JP5797032B2 - Wire connection terminal - Google Patents

Description

  The present invention mainly relates to a wire connecting terminal for connecting a wire to a conductive member such as a battery electrode plate or a distribution plate.

Conventionally, as a power source for various memory backups such as electronic devices, conductive members composed of extremely thin metal plates such as cylindrical, button-shaped, coin-shaped battery electrode plates and integrated circuit terminal pieces have been widely used. Such a conductive member is connected to a terminal to which an end of the electric wire is attached by a method such as spot welding (resistance welding) or laser welding.
The connection terminal includes a connection portion connected to a portion protruding upward of a sealing plate that is sealed to the opening of the battery case via a gasket, a mounting portion for attaching a lead wire, and a connecting portion for connecting them. It is comprised (refer patent document 1).

JP 2010-123363 A

However, in the above conventional connection terminal, although the attachment portion is attached by caulking the core wire of the electric wire, the core wire protruding from the caulking portion extends straight to the tip as shown in FIG. Therefore, the attachment portion is not crimped so that the tip end portion of the core wire rises, and there is a problem that the electric wire is easily pulled out.
In addition, in the conventional connection terminal, it is also shown in FIG. 1 that the caulking height (wire crimp height) of the mounting portion where the core wire is caulked is about half of the diameter of the electric wire. The core wire is AWG (American wire gauge) # 24 (outer diameter of electric wire 1.46mm, outer diameter of core wire 0.62mm) by UL3385 standard by Underwriters Laboratories Inc. When the outer diameter is less than half of the outer diameter of the electric wire, the caulking portion does not substantially crimp the core wire and cannot contribute to the removal of the electric wire.

Furthermore, since the upper surface of the caulking portion of the mounting portion is completely flat (see FIG. 1 of Patent Document), the core wire is rubbed at the edge of the caulking portion, or scratches and cuts caused by being cut into the edge cannot be prevented. As a result, the outer diameter of the core wire is reduced, and the electric wire is easily removed.
In addition to this, the lower surface of the caulking portion of the attachment portion is flat (see FIG. 1), and the attachment portion is not caught by the core wire and the covering portion of the electric wire, so that the removal of the electric wire cannot be suppressed.

  Accordingly, in view of such points, the wire connection terminal according to the present invention forms a wire upright piece having an appropriate height from a metal plate having a predetermined thickness corresponding to the thickness of the wire, and covers the crimping portion and the conductor. It is an object of the present invention to provide an electric wire connection terminal that suppresses disconnection of an electric wire by making the height difference with the crimping portion smaller than the thickness of the electric wire covering portion.

In order to achieve the above object, the present invention employs the following technical means.
The wire connection terminal according to the present invention is a wire connection terminal that firstly connects an electric wire E covered with a covering portion Z having a predetermined thickness T to a conductor portion W made of a core wire to a conductive member B,
A terminal body 2 formed by processing a metal plate K composed of nickel at least on both front and back surfaces is formed on a front end portion of the terminal body 2 and welded to the conductive member B. A conductor pressure-bonding portion 5 which is formed in a longitudinally middle portion of the main body 2 and which is caulked and fixed between a pair of left and right wire upright pieces 4a and 4b, which is exposed by peeling off the covering portion Z at the end of the electric wire E. A covering crimping portion 7 formed at the rear end of the terminal body 2 and crimping and fixing a non-peeling portion of the covering portion Z of the electric wire E between a pair of left and right insulation upright pieces 6a and 6b; A connecting portion 8 formed on the terminal body 2 so as to connect the portion 7 and the conductor crimping portion 5;
The electric wire E has an outer diameter D1 of the conductor portion W of 0.10 mm to 3.10 mm,
The metal plate K has a thickness T ′ of 0.10 mm to 0.30 mm,
The conductor crimping portion 5 has a standing height H1 from the lower end of the conductor crimping portion 5 to the upper end of the wire upright pieces 4a and 4b of 0.20 mm to 6.95 mm.
The connecting part 8 connects the covering crimping part 7 and the conductor crimping part 5 so that the covering crimping part 7 is positioned below the conductor crimping part 5;
The difference H2 in the vertical position from the lower end of the covering crimping portion 7 to the lower end of the conductor pressing portion 5 is smaller than a predetermined thickness T of the covering portion Z of the electric wire E.

Secondly, the conductor crimping portion 5 includes a conductor bent portion 12 that is bent to the side where the upper ends of the pair of left and right wire upright pieces 4a and 4b are crimped ,
The coating crimping portion 7, and the pair of left and right insulation standing piece 6a, characterized that you have provided a cover bent portion 13 bent to the side crimping each upper end of 6b.

Third, the metal plate K is a pure nickel metal plate, a nickel-plated iron plate, or a nickel-plated stainless steel plate .

Due to these features, the terminal body 2 molded from the metal plate K adds a flat weld portion 3 welded to the conductive member B and an exposed conductor portion W between the pair of left and right wire upright pieces 4a and 4b. The conductor crimping portion 5 to be fastened and fixed, the cover crimping portion 7 for crimping and fixing the non-peeled portion of the covering portion Z between the pair of left and right insulation upright pieces 6a and 6b, the sheath crimping portion 7 and the conductor crimping portion 5 The thickness T ′ of the metal plate K is 0.10 mm according to the electric wire E in which the outer diameter D1 of the conductor W is 0.10 mm or more and 3.10 mm or less. When the standing height H1 of the wire upright pieces 4a and 4b is 0.20 mm or more and 6.95 mm or less when the height is 0.30 mm or less, the wire connection terminal 1 is suitable for caulking the wire E having a predetermined thickness. The metal plate K has a thickness T ′ and a standing height H1. It enables retaining of the wire E by reliable crimping fixation of the wire E.
Furthermore, as shown in FIG. 10, the difference H2 in the vertical position from the lower end of the coated crimping portion 7 to the lower end of the conductive crimped portion 5 is made smaller than the thickness T of the coated portion Z of the electric wire E, thereby Since the shaft core J ′ is in an eccentric state closer to the terminal body 2 side than the shaft core J of the electric wire E, even if the electric wire E is pulled, the tensile force F applied to the electric wire E is decomposed and the inner surface of the terminal main body 2 is Since the vertical friction F ′ and the static frictional force M between the serration convex portions 9 proportional to the vertical efficacy F ′ work, the more the wire E is pulled out, the more the force that suppresses the removal of the wire E works. As a result, a further retaining is obtained.

Alternatively, the upper ends of the left and right wire upright pieces 4a and 4b may be bent inward, and the upper ends of the left and right insulation upright pieces 6a and 6b may be bent inward, and this bending (conductor bent portion 12, covering bent portion 13). by, standing pieces 4a wires E, 4b, 6a, when placed between 6b, it is possible to attract the wire E, liable to caulking fixing, production efficiency of the wire connection terminal 1 is above that.

In addition to this, the metal plate K is a pure nickel metal plate, a nickel-plated iron plate, or a nickel-plated stainless steel plate, thereby ensuring conductivity between the electric wire E and the conductive member B (battery or the like) Since it has strength as a terminal, even if the electric wire E is pulled after being welded to the battery B, bending stress acts and the terminal body 2 does not bend easily .

In addition to this, the wire connecting terminal has the wire rising pieces 4a and 4b of the conductor crimping portion 5 formed with an arc portion 10 at the upper front end portion and the upper rear end portion, and the radius R of the arc portion 10 is 0.10 mm or more. It may be 0.40 mm or less.
Further, the conductor crimping part 5 in which the wire connecting terminal is crimped and fixed to the conductor part W exposed at the end of the electric wire E has a crimping height from the lower end of the conductor crimping part 5 to the upper end of the wire upright pieces 4a and 4b. H1 ′ is 0.15 mm or more and 2.65 mm or less, and a bell mouth edge 11 whose diameter increases in an arc shape as it approaches the front end edge and the rear end edge of the wire upright pieces 4a and 4b is the wire upright pieces 4a and 4b. In some cases, the radius R ′ of the arc of the bell mouth edge 11 is 0.05 mm or more and 0.55 mm or less.
Furthermore, as for the electric wire connection terminal, the electric wire E has an outer diameter D2 of the electric wire E of 0.30 mm to 4.90 mm and a thickness T of the covering portion Z of 0.10 mm to 0.90 mm. The covering crimping portion 7 has a standing height H3 from the lower end of the covering crimping portion 7 to the upper end of the insulation standing pieces 6a, 6b of 0.45 mm or more and 7.65 mm or less. In some cases, the crimping height H3 ′ from the lower end of the cover crimping portion 7 with the peeled portion crimped to the upper end of the insulation upright pieces 6a, 6b is 0.35 mm or more and 4.65 mm or less.
And the electric wire connecting terminal includes the serration convex portion 9 bulged to the side crimped in a hook shape along the left-right direction of the terminal body 2, and the raised height of the serration convex portion 9. The height H4 may be 0.02 mm or more and 0.17 mm or less.
In addition, the wire connection terminal has an exposed length L of the conductor portion W exposed at the end of the wire E of 2.0 mm to 3.5 mm, and is installed from the front end of the wire upright pieces 4a and 4b. The longitudinal length L1 to the rear end of the standing pieces 6a, 6b is 3.5 mm or more and 5.0 mm or less, and the longitudinal length L2 of the wire standing pieces 4a, 4b is 1.5 mm or more and 3.0 mm or less, The longitudinal length L3 of the insulation upright pieces 6a and 6b may be 0.5 mm or more and 1.5 mm or less.
In addition, in the wire connection terminal, the welded portion 3 may be formed in a substantially circular shape in plan view and may include a long hole 14 extending along the front-rear axis X of the terminal body 2.
When the radius R of the arc part 10 of the wire upright pieces 4a and 4b is set to an appropriate value of 0.10 mm or more and 0.40 mm or less, the crimped wire upright pieces 4a and 4b are cracked or a bell to be formed is formed. The occurrence of problems such as the mouse (bell mouth edge 11) being too small can be suppressed, and the appropriately shaped bell mouth edge 11 prevents the conductor part W of the electric wire E from being damaged, and the core wire is broken. Therefore, the wire connection terminal 1 can have sufficient wire tensile strength.
In addition to this, when the crimping height H1 ′ of the wire upright pieces 4a and 4b is formed to be 0.15 mm or more and 2.65 mm or less in the conductor crimping portion 5 to which the electric wire E is crimped and fixed, the conductor crimping portion 5 The conductor portion W having a thickness can be securely crimped and fixed, and at the same time, the eccentricity (axial center difference ΔJ) between the shaft core J ′ of the conductor portion W and the shaft core J of the electric wire E is the coated crimp portion. The force (static frictional force M) that suppresses the disconnection of the electric wire E can be adjusted to an appropriate value.
At the same time, when the radius R ′ of the expanding arc of the bell mouth edge portion 11 formed at the front end portion and the rear end portion of the wire standing pieces 4a, 4b is set to 0.05 mm or more and 0.55 mm or less. Even when the conductor portion W of the electric wire E touches the edges of the wire upright pieces 4a and 4b, the core wire is not indented or rubbed and damaged, the conductor portion W becomes more difficult to cut, and the wire tensile strength is further improved. I can plan.
By forming the bell mouth edge 11 in this way, in order to prevent the load applied to the wire upright pieces 4a and 4b during caulking from being concentrated on the bell mouth edge 11 and transmitted to the welding portion 3, 3 is eliminated, and at the same time, the gap between the electrode of the conductive member (dry battery, button battery) B and the welded portion 3 is eliminated, and welding can be reliably performed by spot welding.
Then, depending on the outer diameter D2 of the electric wire E of 0.30 mm or more and 4.90 mm or less and the thickness T of the covering portion Z of 0.10 mm or more and 0.90 mm or less, the insulation upright pieces 6a and 6b are 0.45 mm. With the standing height H3 of 7.65 mm or less, and the crimping portion 7 to which the wire E is crimped and fixed, the crimping height H3 ′ of the insulation standing pieces 6a and 6b is 0.35 mm or more and 4.65 mm or less. In this case, the electric wire E can be pressed down together with the covering portion Z, and external force can be prevented from being applied to the conductor crimping portion 5, and the core wire can be prevented from being damaged or cut.

And also with respect to the electric wire E whose exposed length L of the conductor part W is 2.0 mm or more and 3.5 mm or less, the front-rear length from the wire standing piece 4a, 4b front end to the insulation standing piece 6a, 6b rear end L1 is set to 3.5 mm or more and 5.0 mm or less, the longitudinal length L2 of the wire standing pieces 4a and 4b is set to 1.5 mm or more and 3.0 mm or less, and the longitudinal length L3 of the insulation standing pieces 6a and 6b is 0.5 mm. or in the case of a 1.5mm or less, and the core wire protruding length N1, the coated protruding length N2, can be an appropriate value in accordance with the exposure length L, a retaining effect is enhanced.

Further, the welded portion 3 which is formed in a substantially circular shape, when the long hole 14 extending along the longitudinal axis X of the terminal body 2 Ru provided by the long hole 14, when welding the conductive member B, the spot The reactive current in welding can be reduced, and the wire connection terminal 1 can be reliably welded to the conductive member B, leading to an improvement in productivity .

  According to the electric wire connecting terminal according to the present invention, a metal plate having a thickness corresponding to the thickness of the electric wire is formed to a suitable standing height, and the arc radius of the wire rising piece, the covering crimping portion, the conductor crimping portion, By setting the height difference to an appropriate value, the electric wire can be prevented from being pulled out.

It is a top view which shows the punching process of the wire connection terminal which concerns on this invention. It is a top view which shows the electric wire connection terminal after a bending process. It is a side view which shows the electric wire connection terminal after a bending process. It is an AA arrow directional view of FIG. It is a BB line arrow directional view of FIG. FIG. 3 is a view taken along line CC in FIG. 2. It is a perspective view which shows the electric wire connection terminal which connected the electric wire and the electrically-conductive member (dry battery). It is a top view which shows the electric wire connection terminal which crimped and fixed the electric wire. It is a side view which shows the electric wire connection terminal which crimped and fixed the electric wire. It is side surface sectional drawing which shows the electric wire connection terminal which crimped and fixed the electric wire. FIG. 9 is a view taken along the line D-D in FIG. 8. It is a top view which shows the electric wire connection terminal which concerns on other embodiment. It is a perspective view which shows the electric wire connection terminal which connected the electric wire and the electrically-conductive member (button battery).

Hereinafter, embodiments of the electric wire connection terminal 1 according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 11, the electric wire connection terminal 1 is a terminal for connecting the electric wire E in which the conductor portion W is covered with the covering portion Z to a conductive member B such as a dry cell or a button cell.
The conductor portion W of the electric wire E is formed by twisting a plurality of core wires S made of a conductive metal such as a copper wire or a tinned annealed copper wire, or from a core wire S such as a single core wire S. The outer diameter D1 of the conductor part W is 0.10 mm or more and 3.10 mm or less.

The covering portion Z of the electric wire E is an insulator whose material is an electron beam cross-linked polyolefin, a flame retardant cross-linked polyolefin, or the like, and uniformly covers the conductor portion W with a predetermined thickness T. 10 mm or more and 0.90 mm or less.
The outer diameter D2 of the entire electric wire E including the conductor part W and the covering part Z is set to 0.30 mm or more and 4.90 mm or less.

As shown in FIGS. 1 to 3, each wire connection terminal 1 (terminal body 2) is connected in a chain (chain shape) by a long band-shaped carrier 21 made of a metal plate K, and is transported during transportation. The carrier 21 is rolled up and carried together with each wire connection terminal 1.
The carrier 21 is connected to the rear end of the terminal main body 2 (the cover crimping portion 7) and the carrier connecting portion 22, and in the vicinity of the base end portion of the carrier connecting portion 22, the pilot hole is placed on the front-rear axis X of the terminal main body 2. (Carrier hole) 23 is formed.

The pilot hole 23 is a hole for sending out the terminal body 2 by a certain amount when the terminal body 2 is crimped (clamping of the electric wire E).
The terminal main body 2 of the electric wire connection terminal 1 is formed by processing (punching, bending, cutting, caulking, etc.) a metal plate K having at least both front and back surfaces made of nickel.

The metal plate K is a pure nickel metal plate, a nickel plated iron plate, or a nickel plated stainless steel plate. The pure nickel metal plate is made of nickel, which has high conductivity and corrosion resistance, as well as both front and back surfaces. Nickel-plated iron plate and nickel-plated stainless steel plate are iron plates or stainless steel plates such as SUS304 and SUS316. As materials, nickel plating is applied to both the front and back surfaces of these core materials to improve the corrosion resistance and conductivity.
By processing and forming the metal plate K described above, the electric wire E and the conductive member B (battery or the like) have sufficient strength as a terminal while ensuring the conductivity between the electric wire E and the conductive member B (battery or the like). Even if it is done, bending stress works and the terminal body 2 does not bend easily.

Therefore, the conductor portion W cannot be securely crimped and fixed unless the thickness T ′ of the metal plate K is adapted to the outer diameter D1 (thickness) of the conductor portion W. Therefore, with respect to the outer diameter D1 (thickness) of the conductor portion W of the electric wire E of 0.10 mm to 3.10 mm, the thickness T ′ of the metal plate K is 0.10 mm to 0.30 mm. It is said.
For the thickness T ′, if the outer diameter D1 of the conductor portion W is 0.10 mm or more and 0.45 mm or less, or if the outer diameter D1 of the conductor portion W is 0.25 mm or more and 0.45 mm or less, The thickness T ′ of the metal plate K may be determined separately such as 0.10 mm or more and 0.12 mm or less.

Similarly, if the outer diameter D1 is 0.45 mm or more and 0.85 mm or less, the thickness T ′ is 0.12 mm or more and 0.17 mm or less, and if the outer diameter D1 is 0.85 mm or more and 1.35 mm or less, the thickness T ′ is set. If the thickness T ′ is 0.17 mm or more and 0.22 mm or less and the outer diameter D1 is 1.35 mm or more and 2.00 mm or less, the thickness T ′ is 0.22 mm or more and 0.27 mm or less, and the outer diameter D1 is 2. The thickness T ′ that matches the thickness (outer diameter D1) of the conductor W is 0.10 mm or more so that the thickness T ′ is 0.27 mm or more and 0.30 mm if it is 00 mm or more and 3.10 mm or less. The range is set to 0.30 mm or less.
The terminal body 2 has a welding part 3, a conductor crimping part 5, and a covering crimping part 7 arranged in this order from the front end part to the rear end part of the terminal body 2 along the longitudinal axis X of the terminal body 2, Further, the connecting portion 8 connects the covering crimping portion 7 and the conductor crimping portion 5 so that the covering crimping portion 7 is positioned below the conductor crimping portion 5.

That is, a flat weld portion 3 welded to a conductive member B such as a battery is formed at the front end portion of the terminal body 2, and a covering portion at the end portion of the electric wire E is formed in the middle portion of the terminal body 2 in the front-rear direction. A conductor crimping portion 5 for crimping and fixing the exposed conductor portion W by peeling Z is formed, and a portion of the wire E where the covering portion Z is not peeled off (the covering portion Z of the covering portion Z) is formed. A cover crimping portion 7 for crimping and fixing the non-peeling portion) is formed, and a connecting portion 8 is formed so as to connect the cover crimping portion 7 and the conductor crimping portion 5 in an inclined shape (slope shape).
The welded portion 3 located at the front end portion of the terminal main body 2 has a flat plate shape (tab shape) and is formed in a circular shape in plan view. The left and right edges at the rear end of the welded part 3 are switched from an arc shape to a straight line at a point Q (bending point) where the left and right width is 3w, and the welded part 3 extends backward from the bending point Q, A connecting portion 3 a that connects the rear end portion of the welded portion 3 to the front end of the conductor crimping portion 5 is provided.

The connecting portion 3a is formed in a narrow neck shape narrower in the left-right direction than the left-right width 3w.
In addition, the diameter 3d of the welded portion 3 formed in a circular shape is approximately the same diameter (5.5 mm) as the positive electrode B1 of the AA dry battery that is the conductive member B, for example, and is welded to the conductive member B. Any size that does not cause a short circuit may be used.

The welded portion 3 is welded to the electrode of the battery B by spot welding. Spot welding is also called resistance welding, and the welded portion 3 is connected to the conductive member (at the tip of a pair of rod-shaped welding electrodes (positive electrode and negative electrode)). This is a method in which a molten metal is solidified and welded by pressing a large amount of current (welding current) for a short time while pressing firmly on the upper surface of the electrode of B). At this time, a mark pressed on the welded portion 3 remains in a spot shape (see spot P in FIGS. 7 and 13).
The welding current flowing between the pair of welding electrodes is welded by generating heat at the contact point between the welded portion 3 and the electrode of the dry battery B. At this time, a part of the welding current is welded from one welding electrode. It flows through the portion 3 to the other welding electrode and becomes a reactive current that does not contribute to spot welding.

Therefore, as shown in FIGS. 1, 2, and 7, in the present invention, a slit-like long hole 14 extending along the front-rear axis X of the terminal body 2 is provided at the center of the welded portion 3. If the tip of the pair of welding electrodes is pressed against the welding part 3 so as to straddle 14, the welding current flowing out from one welding electrode will not pass through the long hole 14 to pass through the welding part 3. Since it cannot flow to the welding electrode and flows to the electrode side of the dry battery B which is closer than the detour, the reactive current can be reduced.
The long hole 14 of the welded portion 3 has a length 14n along the longitudinal axis X of the terminal body 2 of 3.0 mm, a width 14w along the left and right axis Y of the terminal body 2 is 0.6 mm, The front end and the rear end are formed in an arc shape having a radius 14r of 0.3 mm.

As long as a pair of welding electrodes can be straddled and the reactive current is reduced, the size, shape, length 14n, left and right width 14w, and arc radius 14r are not limited to those described above, and the shape may be circular or elliptical. Or may be curved in a substantially U shape or the like.
As shown in FIGS. 3 to 5, in the conductor crimping portion 5, in the same manner as when two wire upright pieces 4 a and 4 b (wire barrels) protruding symmetrically are bent face to face to form the groove-like gap 5 a, Two insulation upright pieces (insulation barrels) 6a and 6b of the cover crimping portion 7 are bent face to face, and between the insulation upright pieces 6a and 6b, following the groove-like gap 5a of the conductor crimping portion 5 A groove-like gap 7 a of the coated crimping part 7 that continues in the direction in which the front-rear axis X of the terminal body 2 extends is formed in the same manner as the groove-like gap 5 a of the conductor crimping part 5.

The front sectional view of FIG. 4 includes a pair of left and right wire standing pieces 4a and 4b that rises in an arc shape (substantially U-shaped) from the bottom (groove-shaped gap 5a) of the conductor crimping portion 5, and the left and right wire standing pieces 4a. 4b in the left-right direction (left-right axis Y) of the terminal body 2 across the wire upright pieces 4a, 4b on the inner surface of the arc-shaped portion 10 formed on both the upper front end and upper rear end and the conductor crimping portion 5 The serration convex portion 9 that protrudes upward in a bowl shape (side on which the exposed conductor portion W is caulked) and the upper end portions of the left and right wire upright pieces 4a and 4b are located inside (the exposed conductor portion W is caulked). A conductor bent portion 12 bent to the side) is shown.
The standing height H1 from the lower end of the conductor crimping portion 5 to the upper end of the wire upright pieces 4a and 4b corresponds to the outer diameter D1 (that is, the thickness) of the conductor portion W of the electric wire E to be crimped and fixed. If the standing height H1 is lower than the thickness of the conductor portion W, the wire standing pieces 4a and 4b do not reach the upper end of the conductor portion W, and even after crimping, between the left and right wire standing pieces 4a and 4b. A gap (seam) is formed in the wire, and a part of the core wire S is exposed, and the conductor portion W cannot be firmly crimped and fixed.

Also, if the standing height H1 is higher than the thickness of the conductor portion W, the wire standing pieces 4a and 4b will be left over when crimped, and the wire standing pieces 4a and 4b will bite into the conductor portion W and will be rejected. S may be damaged.
Based on this, for the electric wire E in which the outer diameter D1 of the conductor portion W is 0.10 mm or more and 3.10 mm or less, the standing height H1 of the wire standing pieces 4a and 4b is 0.20 mm or more and 6.95 mm or less. If the value is within the range, the seam (gap) between the left and right wire upright pieces 4a and 4b and the remainder of the wire upright pieces 4a and 4b do not occur, and secure caulking and fixing can be realized.

For example, if the outer diameter D1 of the conductor W is 0.10 mm or more and 0.45 mm or less, the standing height H1 is set to 0.20 mm or more and 1.15 mm or less when the standing height H1 of the wire upright pieces 4a and 4b is set. Alternatively, when the outer diameter D1 of the conductor portion W is 0.25 mm or more and 0.45 mm or less, the standing height H1 of the wire standing pieces 4a and 4b may be 0.45 mm or more and 1.15 mm or less.
Similarly, when the outer diameter D1 is 0.45 mm or more and 0.85 mm or less, the standing height H1 is 1.15 mm or more and 2.00 mm or less, and when the outer diameter D1 is 0.85 mm or more and 1.35 mm or less, the standing height H1 is set. When the outer diameter D1 is 1.35 mm or more and 2.00 mm or less, the standing height H1 is 3.00 mm or more and 4.60 mm or less, and the outer diameter D1 is 2.00 mm or more and 3.10 mm or less. Then, the standing height H1 may be set from the range of 0.20 mm or more and 6.95 mm or less in accordance with the outer diameter D1 of the conductor portion W so that the standing height H1 is 4.60 mm or more and 6.95 mm or less. .

The bottom radius 5r of the groove-like gap 5a of the conductor crimping portion 5 is substantially equal to the outer diameter D1 of the conductor portion W, and the opening distance 5w between the upper ends of the left and right wire upright pieces 4a and 4b (the opening width of the conductor crimping portion 5). ) Is about 1.5 to 2.5 times the outer diameter D1.
The circular arc portion 10 formed on the wire upright pieces 4a and 4b has a bell mouth (bell mouth edge) whose mouth is opened (bell-shaped) when the conductor portion W of the electric wire E is crimped by the conductor crimping portion 5. It becomes a bending allowance (or a part of the bend allowance) for forming the portion 11).

Accordingly, when the radius R of the arc portion 10 which is the bending allowance is too small with respect to the thickness of the conductor portion W or the thickness T ′ of the metal plate K, the front end edge and the rear end of the crimped wire upright pieces 4a and 4b Problems such as the bell mouth edge 11 being formed only on one of the edges, or only a small one being formed even if the bell mouth edge 11 is formed on both the front and rear edges, occur.
On the other hand, when the radius R of the arc portion 10 is too large, when the conductor crimping portion 5 is caulked, the bell mouth bending allowance (the front end portion and the rear end portion of the arc portion 10 and the wire upright pieces 4a and 4b) is excessive. Therefore, the force of tightening cannot be released by forming the bell mouth edge 11, so that the crimped wire upright pieces 4a and 4b are broken.

In order to suppress the occurrence of these problems, the arc portion 10 formed on the wire upright pieces 4a and 4b is set within a radius R range of 0.10 mm to 0.40 mm.
In the case of the arc portion 10 (bending margin) having a radius R within this range, the bell mouth edge portion 11 formed when the wire upright pieces 4a and 4b are caulked becomes appropriate, and the conductor portion W of the electric wire E is obtained. As a result, it is possible to prevent damage to the wire and disconnection of the core wire S (that is, partial cutting of the conductor portion W), thereby preventing a decrease in wire tensile strength.

The radius R of the arc portion 10 may be in the range of 0.10 mm to 0.40 mm, but the outer diameter D1 of the conductor portion W is 0.10 mm to 0.45 mm, or the outer diameter D1 is If it is 0.25 mm or more and 0.45 mm or less, the radius R of the circular arc part 10 may be 0.10 mm or more and 0.17 mm or less.
Similarly, if the outer diameter D1 is 0.45 mm or more and 0.85 mm or less, the radius R is 0.17 mm or more and 0.22 mm or less, and if the outer diameter D1 is 0.88 mm or more and 1.35 mm or less, the radius R is set. If the outer diameter D1 is not less than 0.22 mm and not more than 0.27 mm and the outer diameter D1 is not less than 1.35 mm and not more than 2.00 mm, the radius R is not less than 0.27 mm and not more than 0.32 mm, and the outer diameter D1 is not less than 2.00 mm and not more than 3.10 mm. If so, the radius R may be divided into a value suitable for the thickness (outer diameter D1) of the conductor portion W and the thickness T ′ of the metal plate K from 0.32 mm to 0.40 mm.

Since the serration convex portion 9 bites into the conductor portion W made of the core wire S when the conductor crimping portion 5 is crimped, the raised height H4 of the serration convex portion 9 determines the depth at which the serration convex portion 9 bites.
Further, if the raised height H4 of the serration convex portion 9 is too large even though the conductor portion W of the electric wire E is thin (the outer diameter D1 is small), it leads to damage to the core wire S when crimped, and the raised height If the height H4 is too small, it does not contribute to the removal of the electric wire E, and therefore the raised height H4 of the serration convex portion 9 is also preferably in an appropriate range according to the outer diameter D1 of the conductor portion W (FIG. 6, 10).

That is, when the outer diameter D1 of the conductor part W is 0.10 mm or more and 3.10 mm or less in accordance with the thickness of the conductor part W, the raised height H4 of the serration convex part 9 is 0.02 mm or more and 0.0. 17 mm or less.
If the outer diameter D1 of the conductor part W is 0.10 mm or more and 0.45 mm or less, or the outer diameter D1 of the conductor part W is 0.25 mm or more and 0.45 mm or less, the raised height H4 is set to 0. It is good also as 0.02 mm or more and 0.09 mm or less.

Hereinafter, if the outer diameter D1 is 0.45 mm to 0.85 mm, the raised height H4 is set to 0.04 mm to 0.11 mm, and if the outer diameter D1 is 0.85 mm to 1.35 mm, the raised height is set. If H4 is 0.06 mm or more and 0.13 mm or less and the outer diameter D1 is 1.35 mm or more and 2.00 mm or less, the raised height H4 is 0.08 mm or more and 0.15 mm or less, and the outer diameter D1 is 2.00 mm or more. If it is 3.10 mm or less, the raised height H4 may be 0.10 mm or more and 0.17 mm or less.
The raised width 9w of the serration convex portion 9 is larger than the raised height H4 (about 6 to 8 times the raised height H4), and is determined according to the longitudinal length L2 of the wire upright pieces 4a and 4b. 0.35 mm (see FIG. 6).

The difference in the vertical position from the upper end of the serration convex portion 9 to the lower end of the conductor crimping portion 5, that is, the standing height H5 of the serration convex portion 9 is lower than the standing height H1 of the wire standing pieces 4a and 4b (standing height). This standing height H5 is determined by the left and right lengths 9n of the serration convex portions 9 embossed during punching (see FIG. 1). Further, the above-described conductor bent portion 12 is formed further above the upper end of the serration convex portion 9.
As shown in FIG. 4, the conductor bent portion 12 is angled (bent angle) with respect to the inner surface of the wire upright pieces 4a and 4b from a point of a predetermined distance (bend length) 12n from the upper ends of the wire upright pieces 4a and 4b. It is formed by bending inward by α.

Thereby, at the time of caulking, the conductor portion W of the electric wire E can be easily introduced between the left and right wire upright pieces 4a, 4b (the conductor portion W is called up), and at the same time, the conductor portion W that has been drawn in once becomes the wire upright piece 4a, It is possible to prevent a part of the core wire S of the conductor portion W from protruding outside the wire upright pieces 4a and 4b (wire spillage) by making it difficult to come off between 4b.
The conductor bent portion 12 is formed with a tapered portion 12a having a taper angle α ′, and a distal end surface 12b having a predetermined width 12w is formed at the distal end of the tapered portion 12a. The taper portion 12a makes it easy for the wire standing pieces 4a and 4b that caulk the conductor portion W to bite into the core wire S, and the tip surface 12b prevents the core wire S from being damaged excessively.

The front sectional view of FIG. 5 includes a pair of left and right insulation upright pieces 6a and 6b that rise in an arc shape (substantially U shape) from the bottom (groove-like gap 7a) of the cover crimping portion 7, and these left and right insulation upright pieces. A covering bent portion 13 is shown in which the upper end portions of 6a and 6b are bent inward (side where the exposed conductor portion W is crimped).
The standing height H3 from the lower end of the covering crimping portion 7 to the upper end of the insulation standing pieces 6a, 6b also corresponds to the outer diameter D2 (thickness) of the electric wire E itself to be crimped and fixed, and this standing height H3 If the thickness of the electric wire E is too low or too high, the electric wire E cannot be securely crimped and fixed.

That is, if the pressing is insufficient, the movement of the electric wire E is transmitted to the conductor crimping portion 5 and the conductor portion W is easily removed. At the same time, even if the pressing is excessive, the tips of the insulation upright pieces 6a and 6b The core wire S may be damaged by penetrating Z.
In view of this, in order to prevent secure crimping and damage to the core S, the thickness T of the covering portion Z of the electric wire E is 0.10 mm or more and 0.90 mm or less. For the electric wire E having the entire outer diameter D2 including 0.30 mm or more and 4.90 mm or less, the standing height H3 of the insulation standing pieces 6a and 6b is within the range of 0.45 mm or more and 7.65 mm or less. Value.

In general, in the electric wire E, even if the outer diameter D1 of the conductor portion W made of the core wire S is the same, the thickness T of the covering portion Z varies depending on the rated voltage or the like (for example, if the rated voltage is 150V). For example, the thickness T of the covering portion Z is 0.30 mm or 0.35 mm. However, if the rated voltage is 600 V, the thickness T of the covering portion Z is 0.84 mm or 0.85 mm. Naturally, the outer diameter D2 of the entire electric wire E including the covering portion Z also varies depending on the rated voltage and the like.
Based on this, the standing height H3 of the insulation standing pieces 6a, 6b is divided for each outer diameter D1 of the conductor portion W, and the thickness T of the covering portion Z is also taken into account. The standing height H3 corresponding to the outer diameter D2 of the entire E may be set.

The outer diameter D1 of the conductor part W is 0.10 mm or more and 0.45 mm or less, the thickness T of the covering part Z is 0.10 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 0.30 mm or more and 2.15 mm. If it is below, the standing height H3 of the insulation standing pieces 6a, 6b is set to 0.45 mm or more and 3.35 mm or less.
The outer diameter D1 of the conductor part W is 0.25 mm or more and 0.45 mm or less, the thickness T of the covering part Z is 0.15 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 0.55 mm or more and 2.15 mm. If it is below, the standing height H3 of the insulation standing pieces 6a and 6b is set to 0.85 mm or more and 3.35 mm or less.
The outer diameter D1 of the conductor part W is 0.45 mm or more and 0.85 mm or less, the thickness T of the covering part Z is 0.20 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 085 mm or more and 2.55 mm or less. If so, the standing height H3 of the insulation standing pieces 6a and 6b is set to 1.35 mm or more and 4.00 mm or less.
The outer diameter D1 of the conductor portion W is 0.85 mm to 1.35 mm, the thickness T of the covering portion Z is 0.30 mm to 0.85 mm, and the outer diameter D2 of the electric wire E is 1.45 mm to 3.05 mm. If it is below, the standing height H3 of the insulation standing pieces 6a, 6b is set to 2.25 mm or more and 4.75 mm or less.
The outer diameter D1 of the conductor part W is 1.35 mm or more and 2.00 mm or less, the thickness T of the covering part Z is 0.30 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 1.95 mm or more and 3.70 mm. If it is below, the standing height H3 of the insulation standing pieces 6a and 6b is set to 3.05 mm or more and 5.75 mm or less.
The outer diameter D1 of the conductor part W is 2.00 mm to 3.10 mm, the thickness T of the covering part Z is 0.80 mm to 0.90 mm, and the outer diameter D2 of the electric wire E is 3.60 mm to 4.90 mm. If it is below, the standing height H3 of the insulation standing pieces 6a, 6b is set to 5.60 mm or more and 7.65 mm or less.

The bottom radius 7r of the groove-like gap 7a of the coated crimping portion 7 is substantially equal to the outer diameter D2 of the electric wire E, and the opening distance 7w between the upper ends of the left and right insulation upright pieces 6a, 6b (opening width of the coated crimping portion 7). ) Is about 1.5 to 2.5 times the outer diameter D1. Further, the bottom radius 7r of the coated crimping portion 7 is approximately twice the bottom radius 5r in the groove-like gap 5a of the conductor crimping portion 5.
As shown in FIG. 5, a bent portion 13 is also formed in the cover crimping portion 7. This cover bent portion 13 has a predetermined distance (bend length) 13n from the upper ends of the insulation upright pieces 6a and 6b. It is formed by bending inward from the point by an angle (bending angle) β with respect to the inner surfaces of the insulation upright pieces 6a and 6b.

Therefore, like the conductor bent portion 12, the coated bent portion 13 makes it easy to call the electric wire E between the left and right insulation upright pieces 6a and 6b, and the electric wire E once drawn is difficult to come off between the insulation upright pieces 6a and 6b. Become.
The coating bent portion 13 is also formed with a tapered portion 13a having a taper angle β ′, a distal end surface 13b with a predetermined width 13w is formed at the distal end of the tapered portion 13a, and the insulation upright pieces 6a and 6b are While making it easy to bite into the covering portion Z, the covering portion Z is prevented from penetrating.

In addition to the wire standing pieces 4a and 4b of the conductor crimping portion 5 and the insulation standing pieces 6a and 6b of the covering crimping portion 7, a portion standing from the bottom of the terminal body 2 is formed.
The terminal body 2 includes a front flange portion 24 that rises smoothly (continuously) from the rear end of the welded portion 3 to the front end of the conductor crimp portion 5, and the conductor crimp portion 5 extends from the rear upper end of the front flange portion 24. The standing height H6 to the lower end is substantially the same value as the outer diameter D1 of the conductor portion W of the electric wire E to be crimped, and is, for example, not less than 0.45 mm and not more than 0.85 mm.

Furthermore, the terminal body 2 includes a central flange portion 25 that rises smoothly after falling from the rear end of the conductor crimping portion 5 to the front end of the covering crimping portion 7, and the upper edge of the central flange portion 25 is the lowest. To the lower end of the cover crimping portion 7 is substantially the same as a value obtained by adding the vertical difference H2 between the conductor crimping portion 5 and the coating crimping portion 7 to the standing height H6 of the front flange portion 24, For example, it is 0.60 mm or more and 1.10 mm or less.
The rear end edges of the insulation upright pieces 6a and 6b are inclined by an angle (forward tilt angle) γ from the vertical direction to the front, and the angle γ is, for example, 1 ° to 5 °, preferably 3 °.

The front and rear lengths of the conductor crimping part 5 and the covering crimping part 7 will be described.
The front-rear length L1 (the length in the direction along the front-rear axis X of the terminal body 2) from the front end of the wire upright pieces 4a, 4b to the rear end of the insulation upright pieces 6a, 6b, and the front-back length of the wire upright pieces 4a, 4b L2 and the longitudinal length L3 of the insulation upright pieces 6a and 6b correspond to the exposed length L of the conductor portion W exposed at the end of the electric wire E, and the electric wire connecting terminal 1 securely clamps and fixes the electric wire E. The front and rear lengths L1, L2, and L3 are set so that they can be performed (see FIG. 3).
The exposed length L of the conductor portion W may be a length necessary when caulking and fixing the core wire S exposed from the electric wire E. The outer diameter D1 and material of the conductor portion W of the electric wire E, and the conductor crimping portion 5 are sufficient. However, it is preferably 2.0 mm or more and 3.5 mm or less, more preferably 2.0 mm or more and 3.0 mm or less.

When the exposed length L is 2.0 mm or more and 3.5 mm or less, the longitudinal length L1 from the front end of the wire upright pieces 4a and 4b to the rear end of the insulation upright pieces 6a and 6b is 3.5 mm or more and 5.0 mm. Hereinafter, the longitudinal length L2 of the wire upright pieces 4a and 4b is set to 1.5 mm to 3.0 mm, and the longitudinal length L3 of the insulation upright pieces 6a and 6b is set to 0.5 mm to 1.5 mm. It becomes.
When the exposure length L is 2.0 mm or more and 3.0 mm or less, the front / rear length L1 is 3.5 mm or more and 4.5 mm or less, and the front / rear length L2 is 1.5 mm or more and 2.5 mm or less. The length L3 is 0.8 mm or greater and 1.2 mm or less.

These front and rear lengths L1, L2, and L3 are the core wire protruding length N1 (the length at which the tip of the conductor portion W of the crimped and fixed electric wire E protrudes from the wire upright pieces 4a and 4b and is exposed), It is also related to the covering protrusion length N2 (the length at which the tip end portion of the covering portion Z of the wire E fixed by crimping protrudes from the insulation upright pieces 6a and 6b).
If the core wire protrusion length N1 is short, sufficient fixing is not achieved even if the conductor portion W of the electric wire E is crimped between the wire upright pieces 4a and 4b, and the necessary tensile strength cannot be obtained. When the length N1 is long, the remaining tip portion of the core wire S is spilled from the conductor crimping portion 5, causing a short circuit or the like.

When the covering projection length N2 is short, or when the covering portion Z does not protrude from the insulation upright pieces 6a and 6b, the tip of the non-peeled portion of the covering portion Z is located inside the insulation upright pieces 6a and 6b. It will be located behind.
Here, since the insulation standing pieces 6a and 6b are originally set to a standing height H3 that can crimp both the covering portion Z and the conductor portion W, the covering protrusion length N2 is short, etc. In this case, the insulation upright pieces 6a and 6b are left even if caulking, and naturally the entire electric wire E cannot be securely caulked and fixed.

When the covering protrusion length N2 is long, the covering portion Z bites into the crimped wire upright pieces 4a and 4b, and the exposed conductor portion W is bent sharply as described later.
In addition, the malfunction of the core wire protrusion length N1 and the covering protrusion length N2 occurs even if the exposed length L of the conductor portion W is too short or too long.

1 to 11 also show a process in which the electric wire connecting terminal 1 is formed by punching and bending the metal plate K, and crimping and cutting the electric wire E.
As shown in FIG. 1, in a state where the wire connection terminal 1 (terminal body 2) is punched from the metal plate K, the welded portion 3, the conductor crimping portion 5, the connecting portion 8, and the covering crimping portion 7 are integrated. As a flat punched piece, the terminal body 2 is sequentially arranged on a straight line, and the length 2n of the terminal body 2 is such that the conductor portion W exposed at the end of the electric wire E can secure a sufficient exposed length L. For example, the front-rear length 2n is 10.2 mm.

The terminal body 2 is punched symmetrically with respect to the front-rear axis X, and the left and right width 2w of the flat plate-like conductor crimping portion 5 (wire upright pieces 4a and 4b) is the outer diameter of the conductor portion W to be crimped. Similarly, the left and right width 2w ′ of the cover crimping portion 7 (insulation standing pieces 6a and 6b) formed larger than D1 and formed into a flat plate shape is formed larger than the outer diameter D2 of the wire E itself to be crimped.
Further, the terminal body 2 has two raised serration protrusions 9 extending in the left-right direction, which are arranged in the front-rear direction of the connection terminal 1 and embossed on the conductor crimping portion 5.

A pair of left and right wire upright pieces 4a and 4b and insulation upright pieces 6a and 6b are erected by bending, and a groove-like gap 5a is formed between the wire upright pieces 4a and 4b. A groove-like gap 7a is formed between 6a and 6b (see FIGS. 4 and 5).
In the next crimping process, the electric wire E is drawn into the groove-shaped gap 5a of the conductor crimping portion 5, the wire upright pieces 4a, 4b are crushed toward the groove-shaped gap 5a, and the conductor crimping portion 5 is crimped. It is inserted and crimped (FIGS. 7 to 9).

When the electric wire E is sandwiched in the groove-shaped gap 5a of the conductor crimping portion 5, the positioning is performed by the pilot hole 23 of the carrier 21 so that the covering portion Z of the electric wire E is sandwiched in the groove-shaped gap 7a of the coated crimping portion 7 at the same time. The wire upright pieces 4a and 4b and the insulation upright pieces 6a and 6b are closed, the exposed conductor portion W is crimped and fixed to the conductor crimping portion 5, and the entire wire E is crimped and fixed to the covering crimping portion 7. .
In particular, the caulking of the conductor crimping portion 5 is important because it affects not only the tensile strength of the conductor portion W but also the contact resistance generated on the contact surface due to poor caulking or unevenness of the contact surface.

The crimping degree of the conductor crimping portion 5 is indicated by a crimping height H1 ′ (wire crimp height) from the lower end of the conductor crimping portion 5 to the upper ends of the wire upright pieces 4a and 4b. This crimping height H1 ′ is If the outer diameter D1 of the conductor portion W and the thickness T ′ of the metal plate K are changed, the appropriate heights are naturally different (see FIGS. 9 and 10).
Therefore, in the present invention, for the electric wire E in which the outer diameter D1 of the conductor portion W is 0.10 mm or more and 3.10 mm or less, the crimping height H1 ′ of the wire upright pieces 4a and 4b is 0.15 mm or more and 2 .65 mm or less.

For example, if the outer diameter D1 of the conductor portion W is 0.10 mm or more and 0.45 mm or less, the crimping height H1 ′ is 0.15 mm or more and 0 or more. It is good also as 50 mm or less.
In this case, the right and left width 5w ′ of the crimped conductor crimping portion 5 is not less than 0.15 mm and not more than 1.05 mm.

If the outer diameter D1 of the conductor W is 0.25 mm or more and 0.45 mm or less, the crimping height H1 ′ of the wire upright pieces 4a and 4b is set to 0.20 mm or more and 0.50 mm or less.
In this case, the caulked lateral width 5w ′ is 0.25 mm or more and 1.05 mm or less.

Similarly, when the outer diameter D1 is 0.45 mm or more and 0.85 mm or less, the crimping height H1 ′ is 0.50 mm or more and 0.80 mm or less, and the crimping width 5w ′ is 1.05 mm or more and 1.75 mmmm or less. .
When the outer diameter D1 is 0.85 mm or more and 1.35 mm or less, the crimping height H1 ′ is 0.80 mm or more and 1.20 mm or less, and the crimping width 5w ′ is 1.75 mm or more and 2.60 mm or less.

When the outer diameter D1 is 1.35 mm or more and 2.00 mm or less, the caulking height H1 ′ is 1.20 mm or more and 1.80 mm or less, and the caulking width 5w ′ is 2.60 mm or more and 3.85 mm or less.
When the outer diameter D1 is 2.00 mm or more and 3.10 mm or less, the crimping height H1 ′ is 1.80 mm or more and 2.60 mm or less, and the crimping width 5w ′ is 3.85 mm or more and 5.50 mm or less.

In addition, each of the AWG sizes # 26, # 24, and # 22 of the UL3385 standard electric wires E (electric wires in which the outer diameter D1 of the conductor portion W falls within the range of 0.45 mm to 0.85 mm) are attached to the metal plate K. In the test bodies 1 to 10 which are crimped and fixed with the wire connection terminal 1 having a thickness T ′ of 0.15 mm, the crimping height H1 ′ (wire crimp height) of the wire upright pieces 4a and 4b and the conductor crimping portion 5 The relationship between the tensile strength of the conductor W against the wire and the contact resistance between the crimping height H1 ′ (wire crimp height) of the wire upright pieces 4a and 4b and the inner surface of the conductor crimping portion 5 and the surface of the conductor W The test results are shown in Tables 1 to 6 below.
In the tensile strength test, the test speed for pulling the electric wire E was 25 mm / min. In the contact resistance test, between the electric wire E and the connection terminal 1, the current was 10 mA, the voltage was 20 mV or less, and the frequency was 1 KHz. I have exchanges.

If the tensile strength (wire strength) when only the wire E is pulled and broken is shown, the wire strength of the AWG size # 26 is about 38.66 N, and the wire strength of the AWG size # 24 is about 60.66 N. The wire strength of AWG size # 22 is 67.59N.
The conductor portion W is a stranded wire obtained by twisting the core wire S, which is a tin-plated annealed copper wire, and the outer diameter D1 of the conductor portion W for each AWG size is 0.48 mm for # 26 and 0.00 for # 24. 62mm, # 22 and 0.76mm.

Table 1 is a test result of the tensile strength of the conductor portion W in the AWG size # 26 electric wire E, and Table 2 is a test result of the tensile strength of the conductor portion W in the AWG size # 24 electric wire E. Table 3 shows the test results of the tensile strength of the conductor part W in the AWG size # 22 electric wire E, and the unit of the values in each table is N (Newton).
Table 4 shows the test results of the contact resistance at the contact surface of the AWG size # 26 electric wire E, and Table 5 shows the test results of the contact resistance at the contact surface of the AWG size # 24 electric wire E. Table 6 shows the test results of the contact resistance at the contact surface of the AWG size # 22 electric wire E, and the unit of the value in each table is mΩ.

First, the tensile strength in the test bodies 1-10 is considered.
The tensile strength of the electric wire E with respect to the connection terminal 1 does not exceed the electric wire strength of each AWG size electric wire E itself, and the AWG size is # in consideration of the load applied when welding or installing in an electronic device. The tensile strength when No. 26 is 24.5N (2.5kgf) or more is acceptable, and the AWG size is No. 24 when the tensile strength is 39.2N (4.0kgf) or more, and the AWG size is # The tensile strength at the time of No. 22 is 49.0 N (5.0 kgf) or more, and it is considered acceptable.

Based on this acceptance value (acceptance threshold), looking at the actual measurement value of the tensile strength of each specimen, when the AWG size is # 26, the crimping height H1 ′ of the wire upright pieces 4a and 4b is set to 0. If it is set to .58mm ± 0.02mm, the average value of tensile strength of around 36N is secured, and the wire strength of this size is about 38.66N as well as clearing the acceptable value. From the above, by setting the crimping height H1 ′ to 0.56 mm or more and 0.60 mm or less, the strength of the unconnected portion of the electric wire E and the tensile strength comparable to that of the unconnected portion can be obtained.
This is not limited to the case where the AWG size is # 26. In the case of # 24, the crimp height H1 ′ is set to 0.59 mm or more and 0.63 mm or less. By setting the tightening height H1 ′ to 0.64 mm or more and 0.68 mm or less, the wire strength of each size of the wire E itself and the same tensile strength can be secured by crimping the wire E and the connection terminal 1. .

Next, the contact resistance in the test bodies 1 to 10 will be considered.
As for the contact resistance, 3 mΩ or less is accepted regardless of each AWG size.
For example, the AWG size # 26 electric wire E (the outer diameter D1 of the conductor W is 0.48 mm as described above) has a conductor resistance of about 91.44 Ω / km (= 91.44 mΩ / m). In the case of AWG size # 24, it is about 63.53 mΩ / m, and in the case of AWG size # 22, it is about 35.73 mΩ / m.

Even if the electric wire E is supposed to have no electrical resistance, there is a resistance of at least about 36 mΩ per meter. Therefore, 3 mΩ which is 1/10 or less of this value is set as the acceptable value.
Based on this acceptance value, looking at the actual measurement value of the contact resistance of each specimen, the average value does not exceed 0.57 mΩ regardless of the AWG size and caulking height H1 ′. The value is far below 3mΩ.

As shown in FIG. 11, the core wires S crimped to the conductor crimping portion 5 are in close contact with each other and also in close contact with the inner surface of the conductor crimping portion 5, and the above-described appropriate tensile strength is ensured. In the caulking, there is almost no unevenness on the contact surface between the core wire S, the conductor crimping portion 5, and the contact resistance is very low, and there is no problem in electrical connection.
Accordingly, if the outer diameter D1 of the conductor W is in the range of 0.45 mm or more and 0.85 mm or less (for example, AWG size # 26, # 24, # 22, etc.), the metal plate Even if the thickness T ′ of K is taken into consideration, sufficient tensile strength can be obtained if the crimping height H1 ′ of the wire upright pieces 4a and 4b is set in the range of 0.50 mm to 0.80 mm as described above. And the connection of the electric wire E and the connection terminal 1 which has low contact resistance is realizable.

Then, the stress at the time of crimping the electric wire E with the connection terminal 1 and the bellmouth which arises with the stress are described.
The pressing stress acting on the electric wire E at the conductor crimping portion 5 is concentrated on the serration convex portion 9 raised by the groove-shaped gap 5a, and the concave and convex shapes engaged with the serration convex portion 9 are formed on the core S of the conductor portion W. Since it can be formed on the surface, the electric wire E is firmly crimped to the conductor crimping portion 5 and the covering crimping portion 7 to such an extent that it cannot be pulled out.

In addition to contributing to such a mechanical connection, the serration convex portion 9 can crush and destroy the oxide even if an oxide is attached to the surface of the core wire S, as described above. It is possible to promote reduction of contact resistance and secure electrical connection.
When caulking the electric wire E, that is, when the electric wire E is crushed and deformed to fill and close the groove-like gap 5a and tightly tighten between the wire upright pieces 4a and 4b and the groove bottom, the conductor crimping portion 5, the intermediate part between the front and rear end edges is strongly crushed and indented, and the front and rear end edges are relatively raised with respect to the recess to form a raised edge (bell mouth edge) 11 (FIGS. 7 and 9). 10).

That is, by the crimping process, the bell mouth edge portion 11 whose diameter increases in an arc shape as it approaches the end edge is also formed on both the front end portion and the rear end portion of the wire upright pieces 4a and 4b.
The bell mouth edge portion 11 has a bending margin for the arc portion 10 of the above-mentioned wire upright pieces 4a and 4b (or a portion obtained by combining the arc portion 10 and the front end portion and the rear end portion of the wire upright pieces 4a and 4b). As described above, the radius R of the arc portion 10 is set to 0.10 mm or more and 0.40 or less suitable for the outer diameter D1 of the conductor portion W of the electric wire E and the thickness T ′ of the metal plate K. Because of this, the radius R ′ of the expanding arc can be formed with high accuracy.

As for the specific value of the radius R 'of the bell mouth edge 11, a wire E having an outer diameter D1 of the conductor W of 0.10 mm to 3.10 mm and a thickness T' of 0.10 mm or more is used. In view of caulking with a metal plate K of 0.30 mm or less, the radius R ′ is set to 0.05 mm or more and 0.55 mm or less.
Further, the radius R 'of the bell mouth edge 11 may be divided in the same manner as the caulking height H1'. For example, the outer diameter D1 of the conductor W is 0.10 mm or more and 0.45 mm or less. If the diameter R1 of the bell mouth edge 11 is 0.05 mm or more and 0.15 mm or less, or if the outer diameter D1 of the conductor W is 0.25 mm or more and 0.45 mm or less, the diameter expansion radius R ′. May be 0.10 mm or more and 0.15 mm or less.
Similarly, when the outer diameter D1 is 0.45 mm to 0.85 mm, the expanded radius R ′ is set to 0.15 mm to 0.25 mm, and when the outer diameter D1 is 0.85 mm to 1.35 mm, the expanded radius R is set. 'Is 0.25 mm to 0.35 mm and the outer diameter D1 is 1.35 mm to 2.00 mm, the expanded radius R' is 0.35 mm to 0.45 mm, and the outer diameter D1 is 2.00 mm to 3 When the diameter is 10 mm or less, the diameter-expanding radius R ′ may be classified as 0.45 mm or more and 0.55 mm or less.

Thus, the core wire S is partially cut by forming the bell mouth edge portion 11 having a diameter R ′ corresponding to the conductor portion W or the like at both the front and rear ends of the crimped wire upright pieces 4a and 4b. Or since it is not damaged, the tensile strength does not decrease.
Further, when the conductor portion W is a stranded wire obtained by twisting the core wire S, the bell mouth edge portion 11 is enlarged so as to be away from the core wire S, so that an appropriate distortion on the core wire S is allowed. Can be given a natural twist.

The crimping height H3 ′ of the cover crimping part 7 which is another crimping part is also important for preventing external force from being applied to the conductor crimping part 5.
The crimping height H3 ′ (insulation crimp height) indicating the degree of crimping of the coated crimping part 7 is the height H3 ′ from the lower end of the coated crimping part 7 to the upper end of the insulation upright pieces 6a, 6b, As the crimping portion 5 is set according to the outer diameter D1 and the like of the conductor portion W, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is not only the outer diameter D1 of the conductor portion W but also the electric wire E It is set corresponding to its own outer diameter D2 (including the thickness T of the covering portion Z) and the thickness T ′ of the metal plate K (see FIGS. 9 and 10).

In the present invention based on the above, the outer diameter D1 of the conductor part W is 0.10 mm to 3.10 mm, the thickness T of the covering part Z is 0.10 mm to 0.90 mm, and the outer diameter D2 of the electric wire E Is 0.30 mm or more and 4.90 mm or less, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is set to 0.35 mm or more and 4.65 mm or less.
Note that, as described above, the electric wire E has the same outer diameter D1 of the conductor portion W, but the thickness T of the covering portion Z and the outer diameter D2 of the entire electric wire E differ depending on the rated voltage, etc. Similarly to the height H3, the caulking height H3 ′ of the insulation upright pieces 6a and 6b may be set separately.

That is, the outer diameter D1 of the conductor part W is 0.10 mm to 0.45 mm, the thickness T of the covering part Z is 0.10 mm to 0.85 mm, and the outer diameter D2 of the electric wire E is 0.30 mm to 2 If it is 15 mm or less, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is set to 0.35 mm or more and 2.00 mm or less.
In this case, the right and left width 7w ′ of the crimped cover crimping portion 7 is 0.45 mm or more and 2.50 mm or less.

Further, the outer diameter D1 of the conductor part W is 0.25 mm or more and 0.45 mm or less, the thickness T of the covering part Z is 0.15 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 0.55 mm or more and 2 If it is 15 mm or less, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is set to 0.60 mm or more and 2.00 mm or less.
In this case, the crimped left and right width 7w ′ is 0.70 mm or more and 2.50 mm or less.

Similarly, the outer diameter D1 of the conductor part W is 0.45 mm or more and 0.85 mm or less, the thickness T of the covering part Z is 0.20 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 085 mm or more and 2 If it is 0.55 mm or less, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is 0.90 mm or more and 2.40 mm or less, and the crimping width 7w ′ is 1.10 mm or more and 3.00 mm or less.
The outer diameter D1 of the conductor portion W is 0.85 mm to 1.35 mm, the thickness T of the covering portion Z is 0.30 mm to 0.85 mm, and the outer diameter D2 of the electric wire E is 1.45 mm to 3.05 mm. If it is below, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is 1.45 mm or more and 2.90 mm or less, and the crimping width 7w ′ is 1.85 mm or more and 3.60 mm or less.

The outer diameter D1 of the conductor part W is 1.35 mm or more and 2.00 mm or less, the thickness T of the covering part Z is 0.30 mm or more and 0.85 mm or less, and the outer diameter D2 of the electric wire E is 1.95 mm or more and 3.70 mm. In the following, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is set to 1.95 mm to 3.50 mm, and the crimping width 7w ′ is set to 2.45 mm to 4.40 mm.
The outer diameter D1 of the conductor part W is 2.00 mm to 3.10 mm, the thickness T of the covering part Z is 0.80 mm to 0.90 mm, and the outer diameter D2 of the electric wire E is 3.60 mm to 4.90 mm. In the following, the crimping height H3 ′ of the insulation upright pieces 6a and 6b is set to 3.45 mm to 4.65 mm, and the crimping width 7w ′ is set to 4.35 mm to 5.75 mm.

At the same time as the caulking, the carrier connecting portion 22 of the carrier 21 and the terminal main body 2 are cut. At the time of this cutting, a part 26 ( The cut-off tab) remains, and the length (front-rear length) N3 of the cut-off tab 26 is suppressed to 0.30 mm or less at the longest.
The length N3 of the cut-off tab 26 is suppressed in this way because the position of the terminal body 2 is controlled by the pilot hole 23 formed in the carrier 21, and the position deviation of the terminal body 2 during caulking and cutting is suppressed. Because there is almost no.

Furthermore, at the time of caulking, the welded portion 3 is bent up (bent upward), bent down (folded downward), twisting (left-right direction) with respect to the longitudinal axis X of the terminal body 2. Note that the head swings and rolls (twisting around the longitudinal axis X).
At the same time, attention should be paid to burrs that occur below the base ends of the left and right wire upright pieces 4a and 4b when crimped, the unbalance of the burrs that can be formed on the left and right sides, and the scratches that can be formed on the outer surface of the conductor crimping portion 5.

As shown in FIGS. 3, 9, and 10, the connecting portion 8 connects the covering crimping portion 7 and the conductor crimping portion 5 in an inclined shape (slope shape), and the covering crimping portion 7 is below the conductor crimping portion 5. Is located.
In particular, as shown in FIG. 10, the difference H2 in the vertical position from the lower end of the covering crimping portion 7 to the lower end of the conductor crimping portion 5 is formed smaller than the thickness T of the covering portion Z of the electric wire E.

As a result, the shaft core J ′ of the portion of the exposed conductor W crimped to the conductor crimping portion 5 is positioned below the shaft core J of the electric wire E, that is, the terminal body than the shaft core J of the electric wire E. It is in an eccentric state approaching the second side, and a vertical difference (axial difference) ΔJ occurs between the axial core J ′ of the conductor portion W and the axial core J of the electric wire E.
Since the axis J ′ of the conductor W is eccentric with respect to the axis J of the electric wire E by this axial difference ΔJ, the exposed conductor W is bent and fixed by the conductor crimping part 5 after being bent downward. When the electric wire E is pulled, a tensile force F is applied to the conductor portion W along the direction curved obliquely downward.

This tensile force F is decomposed into a force along the axis J ′ of the conductor portion W and a force F ′ perpendicular to the axis J ′, and this force F ′ is converted into the inner surface of the conductor crimping portion 5 (the inner surface of the serration convex portion 9 or the like). ) Is the vertical effect F ′. If the vertical effect F ′ is applied, naturally, a frictional force (static frictional force) M acts between the surface of the core wire S constituting the conductor part W and the inner surface of the conductor crimping part 5, and this static frictional force M is vertical. It is proportional to the efficacy F ′ (see F, F ′, M in FIG. 10).
Accordingly, as the electric wire E is pulled out, the larger vertical effect F ′ is applied to the inner surface of the conductor crimping portion 5, and the static frictional force M acts in a direction to suppress the removal of the electric wire E in proportion to the vertical effect F ′. Therefore, it is possible to prevent further removal.

The suppression of the disconnection of the electric wire E can be adjusted by the magnitude of the vertical difference H2 between the coated crimping portion 7 and the conductor crimping portion 5, which will be described in detail below.
The above-mentioned vertical effect F ′ is a force obtained by orthogonally projecting the tensile force F in a direction perpendicular to the axis J ′, and when the angle between the axis J ′ and the tensile force F is θ, F ′ = This angle θ increases as the above-described axial center difference ΔJ, which is expressed as Fsinθ, increases. Therefore, the static frictional force M that suppresses the disconnection of the electric wire E is determined by this axial center difference ΔJ.

  The axial difference ΔJ is a length obtained by subtracting the height position J2 of the axis J ′ of the conductor W from the height position J1 of the axis J of the electric wire E. The height position J1 is represented by the following formula (1).

  Next, the height position J2 of the axis J 'of the conductor portion W is expressed by the following formula (2).

  Therefore, the shaft center difference ΔJ obtained by subtracting the height J2 of the shaft core J ′ from the height J1 of the shaft core J is expressed by the following formula (3).

Formula (3) for determining the axial difference ΔJ D1 and T in the lowermost stage are the outer diameter D1 of the conductor part W and the thickness T of the covering part Z in the electric wire E to be crimped, and T ′ and H1 ′ As described above, since it is a value corresponding to the outer diameter D1 of the conductor portion W, naturally, if the electric wire E to be crimped is determined, T ′ and H1 ′ are uniquely determined.
That is, if the electric wire E to be crimped is firmly fixed, the values of D1, T, T ′, and H1 ′ are naturally determined. Only the vertical difference H <b> 2 with the crimping part 5 does not depend on the electric wire E, and the value can be changed.

In other words, if the vertical difference H2 is changed, the value of the shaft center difference ΔJ (that is, the degree of eccentricity) can be adjusted, and further, the static friction force M that suppresses the disconnection of the electric wire E can be adjusted. .
Therefore, when it is desired to increase the axial difference ΔJ between the axis J ′ of the conductor W and the axis J of the electric wire E, the vertical difference H2 between the coated crimp 7 and the conductor crimp 5 is reduced to reduce the axial difference. In order to decrease ΔJ, the vertical difference H2 may be increased. However, it is assumed that the vertical difference H2 is smaller than the thickness T of the covering portion Z of the electric wire E.

If the vertical difference H2 is too small (the axial difference ΔJ is too large), the welded portion 3 warps with respect to the conductor crimping portion 5 when the conductor portion W is crimped with the wire upright pieces 4a and 4b.
When the welded portion 3 is warped in this manner, the spot 3 is warped in such a manner that the welded portion 3 is brought into contact with the electrode surface of the conductive member B at an angle. 3 A gap is formed between the bottom surface and it is impossible to reliably weld.

Furthermore, the conductor portion W is bent sharply after being exposed, and the load concentrates on the bent portion, causing damage to the core wire S or disconnection.
On the other hand, even if the vertical difference H2 is too large (the axial center difference ΔJ is too small), the angle θ between the above-described axial center J ′ and the tensile force F becomes small, and accordingly, the vertical effect F ′ and Since the static frictional force M is also small, the disconnection of the electric wire E cannot be sufficiently suppressed.

In view of this, in order to achieve both the prevention of the removal of the electric wire E and the ease of welding, the outer diameter D1 of the conductor portion W is 0.10 mm to 3.10 mm, and the thickness T of the covering portion Z is 0.1. For the electric wire E having a diameter of 10 mm to 0.90 mm and an overall outer diameter D2 of 0.30 mm to 4.90 mm, the vertical difference H2 between the conductor crimping portion 5 and the coating crimping portion 7 is The thickness is smaller than the thickness T of the portion Z and not less than 0.55 mm and not more than 0.55 mm.
As shown in FIG. 10, the angle θ between the axis J ′ and the tensile force F is the longitudinal length L4 of the connecting portion 8 (from the rear lower end of the bottom of the conductor crimping portion 5 to the covering crimping portion 7). The front-rear length L4 of the connecting portion 8 needs to be fixed by caulking the exposed conductor portion W with the conductor crimping portion 5. The front and rear length L4 is not more than half of the exposed length L of the conductor W, and may be a predetermined length of 0.20 mm or more and 1.00 mm or less, for example.

12 and 13 show another embodiment of the present invention.
In the wire connection terminal 1 according to this embodiment, the elongated hole 14 at the center of the welded portion 3 is not formed, and the shape in plan view is not circular but is a connecting portion 3a that is connected to the conductor crimping portion 5. And has a rear part 3b whose left and right edges are formed in a step shape and a front part 3c having a substantially arc shape, and is long in the front-rear direction, and therefore can be along the longitudinal direction of the welded part 3. , Spot welding can be performed appropriately.

If the shape of the welding part 3 is explained in detail, the connecting part 3a is formed so as to become wider from the front end of the conductor crimping part 5 to the front, and is connected to the rear part 3b with the bending point Q as a boundary.
The rear portion 3b has a stepped right and left width from a portion having the same width as the narrow width 3w of the bending point Q to a wider width 3w ′. The corner of the step is formed in an arc shape with a step radius of 3r.

The front part 3c extending with the left-right width of 3w 'is formed in an arc shape with a left front end part and a right front end part having a front radius 3r'.
The overall length from the bending point Q to the front end of the welded portion 3 is 3n, and the midway length from the step in the rear portion 3b to the front end of the welded portion 3 is represented by 3n ′.

The size of the welded portion 3 may be any size as long as it does not cause a short circuit when it is welded to the conductive member B such as a button battery, but the narrow width 3w is 3.0 mm, and the wide width 3w ′ is 4.5 mm, step radius 3r may be 0.3 mm, front radius 3r ′ may be 2.0 mm, overall length 3n may be 7.1 mm, and midway length 3n ′ may be 6 mm.
Also in this embodiment, the angles of the left and right edges of the connecting portion 3a and the rear portion 3b in the welded portion 3 are changed with the bending point Q as a boundary.

  The present invention is not limited to the embodiment described above. Each structure of the electric wire connection terminal 1 etc. or the whole structure, shape, dimension, etc. can be suitably changed along the meaning of the present invention.

The electric wire E may be anything as long as the outer diameter D1 of the conductor portion W, the thickness T of the covering portion Z, and the outer diameter D2 of the electric wire E as a whole are within the above-described ranges. AWG size # 36, # 32, # 30, # 28, # 29, # 26, # 24, # 22, ## in numbers 3302, 3384, 3385, 3386, 3619, 10368, 10369 No. 20, # 18, # 16, # 14, # 12, and # 10 electric wires E may be used.
In this case, the electric wire E is # 30, # 29, # 28, # 26, # 24, # 22, # 20, # 18, among the UL standard AWG sizes described above. For # 16, # 14, # 12, and # 10, the outer diameter D1 of the conductor W is 0.25 mm to 3.10 mm, and the thickness T of the covering Z is 0.15 mm to 0.00. 90 mm or less, the outer diameter D2 of the entire electric wire E is 0.55 mm or more and 4.99 mm or less, and accordingly, the thickness T ′ of the metal plate K is 0.10 mm or more and 0.30 mm or less, and the wire upright pieces 4a and 4b The standing height H1 is 0.45 mm or more and 6.95 mm or less, the crimping height H1 ′ is 0.20 mm or more and 2.65 mm or less, and the standing height H3 of the insulation standing pieces 6a and 6b is 0.85 mm or more and 7. 3. 65 mm or less, caulking height H3 ′ of 0.60 mm or more 5 mm or less, radius R of arc part 10 of wire upright pieces 4a and 4b is 0.10 mm or more and 0.40 mm or less, diameter expansion radius R ′ of bellmouth edge 11 is 0.05 mm or more and 0.55 mm or less, serration convex part 9 may be 0.02 mm or more and 0.17 mm or less, and the vertical difference H2 between the conductor crimping portion 5 and the coating crimping portion 7 may be 0.10 mm or more and 0.55 mm or less.

Similarly, if the wire E is # 28, # 26, # 24, # 22, # 20, # 18, # 16 among the UL standard AWG sizes, the conductor portion The outer diameter D1 of W is 0.30 mm or more and 1.55 mm or less, the thickness T of the covering portion Z is 0.15 mm or more and 0.85 mm or less, and the outer diameter D2 of the entire electric wire E is 0.75 mm or more and 3.25 mm or less. Accordingly, the thickness T ′ of the metal plate K is 0.10 mm or more and 0.25 mm or less, the standing height H1 of the wire upright pieces 4a and 4b is 0.60 mm or more and 2.75 mm or less, and the crimping height H1 ′. 0.25 mm to 1.15 mm, the standing height H3 of the insulation standing pieces 6a and 6b is 1.20 mm to 5.00 mm, the crimping height H3 ′ is 0.80 mm to 3.10 mm, and the wire is erected The radius R of the circular arc part 10 of the pieces 4a and 4b is set to 0. 15 mm or more and 0.30 mm or less, the diameter radius R ′ of the bell mouth edge 11 is 0.05 mm or more and 0.45 mm or less, the raised height H4 of the serration convex part 9 is 0.02 mm or more and 0.15 mm or less, and the conductor crimping part 5 and the cover crimping portion 7 may have a vertical difference H2 of 0.10 mm to 0.50 mm.
Further, if the electric wire E is # 26, # 24, # 22 among the UL standard AWG sizes described above, the outer diameter D1 of the conductor portion W is 0.45 mm or more and 0.85 mm or less, and the covering portion The thickness T of Z is 0.20 mm or more and 0.85 mm or less, and the outer diameter D2 of the entire electric wire E is 0.85 mm or more and 2.55 mm or less. Accordingly, the thickness T ′ of the metal plate K is 0.15 mm. The standing height H1 of the wire standing pieces 4a and 4b is 1.15 mm or more and 2.20 mm or less, the crimping height H1 ′ is 0.50 mm or more and 0.80 mm or less, and the standing height H3 of the insulation standing pieces 6a and 6b. 1.35 mm or more and 4.00 mm or less, caulking height H3 ′ of 0.90 mm or more and 2.40 mm or less, radius R of arc part 10 of wire upright pieces 4a and 4b is 0.20 mm, Expansion radius R 'is 0.10mm or more 0 .40 mm or less, the raised height H4 of the serration convex part 9 is 0.04 mm or more and 0.11 mm or less, and the vertical difference H2 between the conductor crimping part 5 and the coated crimping part 7 is 0.10 mm or more and 0.50 (or 0.8. It is good also as 10 mm or more and 0.30 mm or less) mm or less.

The welded portion 3 has a circular shape or a shape having a longitudinal direction in plan view. However, if the welded portion 3 can be welded to the electrode of the conductive member B and does not cause a short circuit, any shape such as an ellipse, a spiral shape, or a triangle shape may be used. But it ’s okay.
If the covering crimping part 7 is positioned below the conductor crimping part 5, the connecting part 8 may not be in a slope shape, and the covering crimping part 7 and the conductor crimping part 5 are connected in a step shape. May be.

The number of the serration convex portions 9 may be one, or may be three or more as long as the serration convex portions 9 can be formed within the longitudinal length L2 of the wire upright pieces 4a and 4b (the longitudinal length of the conductor crimping portion 5).
The exposed length L of the conductor portion W in the electric wire E may be peeled off from the covering portion Z at the end of the electric wire E with 2.5 mm as a guideline. When the exposed length L is 2.5 mm, The front / rear length L1 from the front end of the wire upright pieces 4a, 4b to the rear end of the insulation upright pieces 6a, 6b is 4.0 mm, the front / back length L2 of the wire upright pieces 4a, 4b is 2.0 mm, the installation upright pieces 6a, The front-rear length L3 of 6b may be 1.0 mm.
The radius R of the arc portion 10 in the wire upright pieces 4a and 4b of the conductor crimping portion 5 is set to a suitable radius R according to the thickness T ′ of the metal plate K. For example, the thickness of the metal plate K is When T ′ is 0.10 mm, the radius R is 0.15 mm, when the thickness T ′ is 0.15 mm, the radius R is 0.20 mm, and when the thickness T ′ is 0.20 mm. The radius R may be 0.25 mm, the radius R may be 0.30 mm if the thickness T ′ is 0.25 mm, and the radius R may be 0.35 mm if the thickness T ′ is 0.30 mm.

  The present invention mainly connects an electric wire to a dry battery, a button battery, etc., but if it is a terminal composed of an extremely thin metal plate for caulking and fixing an electric wire in an electronic device, it is used for computers and audio devices. It can utilize also when connecting an electric wire also to electrically conductive members other than a battery.

DESCRIPTION OF SYMBOLS 1 Electric wire connection terminal 2 Terminal main body 3 Welding part 4a, 4b A pair of left and right wire standing piece 5 Conductor crimping part 6a, 6b A pair of left and right insulation standing piece 7 Covering crimping part 8 Connection part 9 Serration convex part 10 Arc of wire standing piece Part 11 Bell mouth edge of standing wire 12 Conductor bent part 13 Covered bent part 14 Long hole of welded part E Electric wire W Electric conductor part of electric wire Z Electric wire covering part B Conductive member K Metal plate D1 Outer diameter of electric wire conductor part D2 Outer diameter of the wire T Thickness of the covering portion of the wire T 'Thickness of the metal plate H1 Standing height of the wire standing piece H2 Difference in vertical position from the lower end of the covering crimping portion to the lower end of the conductor crimping portion H3 Standing height H4 Raising height of serration convex part R Radius of arc part of wire standing piece H1 'Clamping height of wire standing piece H3' Clamping height of insulation standing piece R 'Berma Radius of the arc that expands the edge of the wire L L The exposed length of the conductor part of the electric wire L1 The longitudinal length from the front end of the wire standing piece to the rear end of the insulation standing piece L2 The longitudinal length of the wire standing piece L3 The length of the insulation standing piece Longitudinal length X Longitudinal axis of terminal body

Claims (3)

A conductor connecting terminal (W) comprising a core wire is a wire connecting terminal for connecting an electric wire (E) covered with a covering portion (Z) having a predetermined thickness (T) to a conductive member (B),
A terminal body (2) obtained by processing and molding a metal plate (K) having at least both front and back surfaces made of nickel is formed into a flat plate shape formed on the front end of the terminal body (2) and welded to the conductive member (B). A pair of left and right conductors (W) formed on the middle part of the terminal body (2) in the front-rear direction and exposed by peeling off the covering (Z) at the end of the electric wire (E). A conductor crimping portion (5) for crimping and fixing between the wire upright pieces (4a, 4b) of the wire, and a non-finished portion (Z) of the wire (E) formed at the rear end portion of the terminal body (2) The cover crimping part (7) for crimping and fixing the peeled portion between the pair of left and right insulation upright pieces (6a, 6b), and the cover crimping part (7) and the conductor crimping part (5) are connected to each other. A connecting portion (8) formed on the terminal body (2),
The electric wire (E) has an outer diameter (D1) of the conductor portion (W) of 0.10 mm to 3.10 mm,
The metal plate (K) has a thickness (T ′) of 0.10 mm to 0.30 mm,
The conductor crimping part (5) has a standing height (H1) from the lower end of the conductor crimping part (5) to the upper end of the wire upright pieces (4a, 4b) of 0.20 mm or more and 6.95 mm or less,
The connecting part (8) connects the covering crimping part (7) and the conductor crimping part (5) so that the covering crimping part (7) is located below the conductor crimping part (5).
The difference (H2) in the vertical position from the lower end of the covering crimping portion (7) to the lower end of the conductor crimping portion (5) is smaller than the predetermined thickness (T) of the covering portion (Z) of the electric wire (E). Electric wire connection terminal. The conductor crimping part (5) includes a conductor bent part (12) bent to the side for crimping each upper end part of the pair of left and right wire upright pieces (4a, 4b),
The said covering crimping | compression-bonding part (7) is equipped with the coating bending part (13) bent to the side which caulks each upper end part of the said left-right paired insulation standing piece (6a, 6b), It is characterized by the above-mentioned. The electric wire connection terminal according to 1.   The electric wire connection terminal according to claim 1, wherein the metal plate (K) is a pure nickel metal plate, a nickel-plated iron plate, or a nickel-plated stainless steel plate.

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