JP5926215B2 - Connector terminal - Google Patents

Description

  The present invention relates to a connector terminal that is held in a connector housing (hereinafter referred to as a housing as appropriate) and relays connections between a plurality of circuits and modules.

  Connector terminals (hereinafter referred to as “terminals” as appropriate) are used by being press-fitted and held in a plurality of holding holes formed in the housing, but the holding accuracy of the terminals is not only the appropriate holding strength but also the electrons relayed by the terminals. The circuit performance is greatly affected, and the load and thread burrs that are generated by press-fitting into the housing also greatly affect the product yield and production efficiency.

Therefore, a method of providing a locking projection at a position where the terminal is to be held (holding position), and a method of enabling stable standing without backlash by providing a plurality of protrusions whose shape is devised at the holding position. (For example, refer to Patent Document 1 and Patent Document 2 below).
Further, as a technique for avoiding the harmful effects caused by the occurrence of thread burrs, by providing a small width part with a step in front of the holding position, the thread burrs generated by the press-fitting of the terminals are interrupted, and the terminals and thread burrs For example, a method of insulating the wire (see, for example, Patent Document 3 below) is employed.

JP 2000-243495 A JP 2005-340068 A JP 2009-16328 A

  However, although the structural features according to each purpose are given to the above method, if the hole diameter up to the holding position is larger than the outer diameter of the terminal, the terminal insertion speed is increased, but the terminal There is a problem that the posture with respect to the housing becomes unstable and the standing state when the holding position is reached (the standing state of a plurality of terminals: hereinafter referred to as straightness) is not stable.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a connector terminal that has a high planting efficiency in a housing, avoids a short circuit between terminals due to thread burrs, and has a stable holding position and holding posture. And

The connector terminal according to the present invention made to solve the above problems is a terminal held in the holding hole of the connector, and is a linear terminal portion in contact with a terminal of a member inserted into the holding hole and phase-connected, The locking part includes a locking part that presses against the inner wall surface of the holding hole, the locking part has a protruding locking piece, and the direction of the terminal part coincides with the direction of the holding hole immediately before the locking part. The correction portion has a cross-sectional portion in contact with the inner surface of the holding hole over a certain length, and the four protrusions forming the cross-sectional portion are connected to the outer edge of the terminal portion. The distance from the center line of the terminal portion of the protrusion in a direction parallel to the protruding direction of the locking piece is longer than the distance of the terminal portion, and has a parallel outer edge. It is characterized by being shorter than the distance .
Here, the connector is a member intended to collectively connect one or a plurality of electronic circuits, such as sockets, plugs, and boards, regardless of the material.

  It is desirable that the locking portion includes a locking piece that protrudes to the opposite side of the terminal where the protrusion does not protrude.

  In addition, the terminal portion has a square cross-section linear shape, the cross-sectional cross-section portion includes four protrusions along a diagonal line of the square cross-section, and the locking portion is a right angle of four sides forming the square cross-section. You may comprise as a connector terminal provided with the latching piece in alignment with a bisector.

According to the connector terminal of the present invention, by providing the linear terminal portion that can be inserted without widening the holding hole, it is possible to increase the efficiency of implantation in the housing, and when the terminal portion is inserted. It is possible to suppress the occurrence of yarn burrs.
Further, the straightness of the terminal immediately before the locking portion when the terminal is implanted in the holding hole by the configuration including the correction portion that aligns the direction of the terminal portion with the direction of the holding hole immediately before the locking portion. Can be made more uniform, and the posture when a plurality of terminals are implanted in an aligned state can be made uniform.

  Furthermore, the holding position and the holding posture can be stabilized by providing the locking portion with a locking piece protruding to the opposite side of the terminal where the protrusion does not protrude. Naturally, it is possible to avoid inconveniences such as deformation of the portion of the inner surface of the holding hole supported by the locking piece due to the protrusion that enters the holding hole prior to the locking piece.

  The terminal portion has a rectangular cross-sectional shape, the cross-sectional portion includes four protrusions along diagonal lines of the rectangular cross-section, and the locking portion has two right-angled four sides forming the rectangular cross-section. By adopting a structure including a locking piece along the bisector, when the correction portion enters the holding hole having a substantially square cross-sectional shape, the protrusion of the correction portion following the terminal portion becomes a diagonal line of the rectangular cross section of the holding hole. It will act to follow. As a result, the rotation at the time of inserting the terminal is restrained in a fixed direction (the direction of the terminal side surface is stable), the friction is reduced, and the entry is facilitated. Deformation can be avoided more reliably (see FIGS. 7 and 8).

It is the perspective view which shows an example of the connector terminal by this invention, and its principal part enlarged view. It is the side view which shows an example of the connector terminal by this invention, and its arrow principal part enlarged view. It is the side view which shows an example of the connector terminal by this invention, and its arrow principal part enlarged view. It is the front view and back view which show an example of the connector terminal by this invention. FIG. 2B shows an example of a connector terminal according to the present invention, (A): AA cross-sectional view, (B): BB cross-sectional view, (C): CC cross-sectional view. (D): DD arrow sectional drawing, (E): EE arrow sectional drawing. It is (A) front view and (B): side view which show an example of the holding state of the connector terminal by this invention. It is a side view which shows an example of the correction process of the approach attitude | position of the connector terminal by this invention. It is explanatory drawing seen from the front which shows an example of the correction process of the approach attitude | position of the connector terminal by this invention.

Embodiments of a connector terminal according to the present invention will be described below with reference to the drawings.
The example shown in FIG. 1 is a terminal held in a holding hole X provided in the connector housing.

The terminal includes a terminal portion 1 that is inserted into the holding hole X and contacts a terminal of a phase-connecting member, a locking portion 2 that is pressed against an inner wall surface of the holding hole X, and a correction that increases straightness with respect to the holding hole X. Part 3 is provided.
Here, the straightness with respect to the holding hole X refers to a property that works so that the insertion direction of the terminal is along the center of the holding hole X.

<Terminal part>
The terminal is made of a series of straight rectangular wires, and has front and rear terminal portions 1a and 1b which are formed in a rectangular shape with a square cross section and tapered at the distal end.
The terminal portion (square wire) 1 and the holding hole X each have a thickness and a shape that allow the terminal portion 1 to be inserted without a large resistance with respect to the holding hole X.
For example, if the holding hole X is □ 0.65 mm, the terminal portion 1 is □ 0.64 mm. The cross section of the terminal portion 1 is smaller than that of the holding hole X so as not to rattle. If it is set, it is possible to avoid the trouble of press-fitting the terminal portion 1 with a strong force (the holding hole X can be inserted without widening), thereby generating yarn burrs caused by interference with the holding hole X. In addition to being able to be suppressed, the efficiency of planting the terminals into the housing (speed) is improved, which contributes to the improvement of product yield and production efficiency (see FIGS. 5 to 8).

<Locking part>
The locking part 2 is stable while maintaining the posture after the improvement of straightness due to the correction part 3 entering the holding hole X in relation to the inner surface of the holding hole X. Any structure can be used.

For example, the locking portion 2 in the example shown in FIG. 1 includes a fixed-length locking piece that protrudes to the opposite side of the terminal, and divides two or more locking pieces 4a and 4b into the front and rear. Prepare.
Each locking piece 4a, 4b has its protruding direction (the direction indicated by the apex of the protruding height; hereinafter referred to as the centrifugal direction) so that its center is along a right-angled bisector of four sides forming the rectangular cross section of the terminal portion 1. (Refer to FIG. 6A).

  The protruding direction of the locking pieces 4a and 4b may be in the same phase (the example shown in FIG. 1 is the same phase) or may be shifted by 90 degrees (here, the phase means The phase is centered on the terminal.) Moreover, even if it is in the length of the said locking pieces 4a and 4b, sufficient length should just be ensured because at least the terminal hold | maintained does not incline largely by the relationship with the inner surface of the said holding hole X. (See FIG. 7C).

Each of the locking pieces 4a and 4b has a uniform cross section as a left-right contrast when viewed from the insertion direction, and has a V-shaped groove (or may be a flat surface or a U-shaped groove) 5a having a width over the entire width at the distal end surface. , 5b are provided over the entire length of the locking pieces 4a, 4b (see FIG. 1).
The pair of claws 6a and 6b formed at the tips of the V-shaped grooves 5a and 5b are pressed against or bite into the inner surface of the holding hole X so that the straightness is improved and the inserted terminal cannot swing. Functions as a supporting anchor.

  In the terminal according to the present invention, the two pairs of the locking pieces 4a and 4b are connected to each other with the intermittent portion 8 therebetween, and the phase in each protruding direction is shifted by 90 degrees, or the two pairs of the engaging pieces are connected. By providing a difference for each pair of the widths of the stop pieces 4a and 4b (or the widths of the V-shaped grooves 5a and 5b), it is possible to shift the press contact portion or the biting portion on the inner surface of the holding hole X.

Further, in order to prompt the entire locking portion 2 to enter with the outer diameter gradually increasing from the correction portion 3, the height of the locking piece 4a at the preceding stage in the approach direction (from the center lines L1 and L2 of the terminal) It is preferable that the distance is the same as the height of the correction portion 3 and slightly lower than the height of the locking piece 4b of the locking portion 2 existing in the subsequent stage.

<Correction unit>
The correction portion 3 is provided immediately before the locking portion 2 and separated from the locking piece 4.
The correction unit 3 has a cross section that contacts the inner surface of the holding hole X over a certain length.
The four ridges 7, 7, 7, 7 forming the cross section have an outer edge parallel to the outer edge of the terminal part 1, and in the centrifugal direction along the diagonal of the rectangular section formed by the terminal part 1, Each of the holding holes X protrudes evenly by a height that touches or slightly bites into the corner (see, for example, FIG. 6A). A taper portion may be provided in front of the correction unit 3.

  As a result of the correction portion 3 being press-fitted, the protrusion 7 follows the diagonal line of the rectangular cross section of the holding hole X or slightly bites into the corner of the holding hole X, and the direction of the terminal side surface and the The approach posture of the terminal is corrected (see FIGS. 7 and 8), and the direction of the terminal portion is made to coincide with the direction of the holding hole X (that is, the straightness is exhibited).

The length of the protrusion 7 is sufficiently longer than the maximum width (diagonal length in this example) of the holding hole X, and at least the inclination of the held terminal is improved in relation to the inner surface of the holding hole X. Length is required.
For example, a practical range for obtaining only the effect of the correction unit 3 is a length that is 1.5 times or more the maximum width of the holding hole X and does not exceed the length of the holding hole X. It is. When both the correction part 3 and the locking part 2 are held inside the holding hole X, the length obtained by subtracting the length of the locking part 2 from the length of the holding hole X is the correction hole. The part 3 is a substantially upper limit of the length at which the practical effect is achieved.

  According to the above configuration, even if a thread burr occurs due to the relationship between the shape of the holding hole X and the protrusion 7 of the cross section, the space between the locking piece 4 and the subsequent locking piece 4 is separated in the longitudinal direction. However, since the separation is caused by the phase shift, the thread burr is divided at the separation point, and the possibility that a short circuit occurs between the terminals after being implanted in the connector is substantially eliminated.

  In addition, the locking piece 4 may be projected at a phase where the adjacent protrusions 7 and 7 of the cross section are not provided, and the protrusion of the cross section on the inner surface of the holding hole X. By pressing and locking at a position different from the position where the strip 7 contacts, there is less possibility that the inner surface of the holding hole X will be damaged before the locking piece 4 is press-fitted. This effect becomes more prominent when the protruding height of the locking piece 4 is higher than the protruding height of the protrusion 7, and the protruding height of the front locking piece 4 a also in the relationship between the front and rear locking pieces 4 a and 4 b. It becomes more prominent when the protruding height of the rear locking piece 4b is higher.

<Intermittent part>
In this example, by providing the intermittent portion 8 in the region sandwiched between the two pairs of the locking pieces 4a and 4b as described above, the yarn burr generated in each of the locking pieces 4a is divided, and two pairs of the locking pieces 4a and 4b are provided. By providing a difference in size between the locking pieces, a lock function is provided for partially holding the mold part of the housing and locking the held state to prevent detachment.

X holding hole,
1 terminal part, 1a terminal part (front), 1b terminal part (rear),
2 locking part, 3 correction part,
4 locking pieces, 4a locking pieces (front), 4b locking pieces (rear),
5 V-shaped groove, 5a V-shaped groove (front), 5b V-shaped groove (rear),
6 nails, 6a nails (front), 6b nails (rear),
7 ridges, 8 intermittent parts,

Claims (3)

A terminal held in a holding hole of the housing,
A linear terminal portion that is in contact with a terminal of a member that is inserted into the holding hole and is connected to each other; and a locking portion that is in pressure contact with the inner wall surface of the holding hole;
The locking part has a protruding locking piece,
Provided with a correction part that makes the direction of the terminal part coincide with the direction of the holding hole immediately before the locking part,
The correction portion has a cross-sectional portion that contacts the inner surface over a certain length of the holding hole,
The four ridges forming the cross section have an outer edge parallel to the outer edge of the terminal part,
The distance from the center line of the terminal portion of the protrusion in a direction parallel to the protruding direction of the locking piece is longer than the distance of the terminal portion and shorter than the distance of the locking piece. Characteristic connector terminal.   2. The connector terminal according to claim 1, wherein the locking portion includes a locking piece that protrudes to the opposite side of the terminal where the protrusion does not protrude. The terminal portion has a rectangular cross-sectional shape,
The cross section includes four ridges along diagonal lines of the square section,
3. The connector terminal according to claim 1, wherein the locking portion includes a locking piece along a right-angled bisector of four sides forming the rectangular cross section.

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