JP3096804B2 - Cable connector contacts, contact assemblies, multi-core cable connectors and crimping tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for increasing the density of connector terminals of a multi-core connector for a cable attached to the end of a multi-core cable, and a technology for connecting a cable wire thereto.

[0002]

2. Description of the Related Art Conventionally, a multi-core connector for a cable is shown in FIG.
As shown in FIG. 5, a plurality of contacts 14 each having a contact portion 15 at one end and an open barrel 16 at the other end for crimping an electric wire are arranged at equal intervals P in a direction orthogonal to the longitudinal direction thereof, and are formed as insulators. A contact assembly which is subjected to insertion molding or press-fitting with the resin body 7 is prepared, the stripped electric wire 2 is placed on the open barrel 16 for crimping the electric wire, and the pressure is sandwiched from above and below with a crimping tool as shown in FIG. In addition, crimping connection of the electric wire to the open barrel 16 is performed.

[0003] The crimping tool of FIG. 19 comprises two parts, the lower side being an anvil assembly 21 and the upper side being a crimper 20. The anvil assembly 21 is provided with a plurality (four in FIG. 19) of anvil portions 19 protruding upward and having a curved concave portion at the upper end. The upper crimper 20 is formed with a concave portion upward so as to correspond to each anvil portion 19, and its shape gradually becomes thinner as it goes up, goes round inward at the upper portion, and it goes down a little, so that it is just bimodal. It has a shape. This is called the crimper part.

At the time of crimping, the lower part of the open barrel 16 on which the wire to be crimped is placed is placed on the anvil part 19 and the crimper 20 is pushed down from above. As a result, the V-shaped both wing tip portions of the open barrel 16 abut each other so as to be rounded in accordance with the curve of the crimper portion 18, and the two right ends of FIG.
The result is to wrap and tighten the wires like a book. Thus, the wire crimping of the open barrel by the number of pairs of the anvil portion and the crimper portion of the crimping tool is simultaneously performed by one crimping operation. FIG. 20 is a perspective view of a state in which five electric wires are crimped and connected to an open barrel for crimping.

[0005]

However, the following problems have arisen in the above prior art. In recent years, with the increase in the number of input / output signals in electronic devices, high-density and multi-core components are being mounted, especially in connectors, and the number of cores is increasing, and the arrangement pitch of contacts is required to be smaller. . As a result, FIG.
The pitch of the anvil part 19 and the crimper part 18 of the crimping tool 9 must also be narrowed according to the pitch between the contacts, but the crimper part 18 is necessary for the open barrel to enter and be crimped and deformed. Since a certain constant width is required, there is a limitation in narrowing the interval.

Further, narrowing the pitch of the crimper portion 18 involves reducing the thickness of the partition wall portion between the adjacent crimper portions 18 and reducing the strength of the crimper itself, so that the interval between the crimper portions is reduced. However, there is a problem in that there is a limit, and therefore, there is a restriction even if an attempt is made to increase the density by reducing the arrangement pitch of the contacts in the contact assembly.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to make the shape of a crimping tool into a tapered deep recess like a conventional crimper by forming the barrel into a cylindrical shape, or to form an anvil assembly. It does not require high protruding parts like the anvil part, and it can be crimped with recesses or grooves that are shallower than conventional crimper recesses. An object of the present invention is to provide a contact for a cable connector, a contact assembly, a multi-core cable connector, and a crimping tool.

[0008]

A contact for a cable connector, a contact assembly, a multi-core cable connector, and a crimping tool according to the present invention have the following means. The first cable connector contact has a barrel formed into a cylindrical shape such that wing portions projecting to the left and right sides with respect to the longitudinal direction of the contact conductor are rounded from the left and right, and both wing tip portions overlap. It is characterized by the following.

The second cable connector contact includes:
The wing part which protrudes to the left and right sides with respect to the longitudinal direction of the contact conductor and whose edges are inclined in the same direction is formed into a cylindrical shape so that both wing ends abut. It has a barrel.

[0010]

[0011] The contact assembly according to the present invention includes the first member.
Or, a plurality of cables arranged in a molded resin insulator in which a plurality of contacts for the second cable connector are inserted and molded at equal intervals and fixedly arranged at high density.
Wire crimp between each barrel of contact for flexible connector
Cable connector is molded resin insulator that separates parts
With respect to the molded resin insulator fixing the contact
Integrally configured through a thin part with a possible hinge function
Contact assembly, characterized in that
You.

[0012]

[0013]

[0014] multi-core cable connector of the present invention is a multi-core cable connector characterized in that it is constituted by a plurality accommodating the contact assembly to the connector housing.

The first crimping tool according to the present invention has a
Upper tooth blocks each having a recess at the same position facing each other
When the lower tooth block and the lower tooth block are
The hollow part formed by the concave part and the concave part of the lower tooth block is an electric wire
Of the first cable connector contact into which
Consists of an upper tooth block and a lower tooth block that are shaped after crimping
It is a crimping tool characterized by being performed.

Furthermore, also configurations of the recess facing the upper and lower teeth have multiple arranged in the arrangement pitch and the same pitch of the cable contact connector of the <br/> contact assembly
Conceivable.

The second crimping tool according to the present invention has a
Width than the diameter of the cylindrical barrel of the respective same position facing the second cable connector contact consists of a lower tooth block and the upper teeth block having a narrow groove in the barrel direction, the upper teeth block with pressure A crimping tool characterized by crimping the electric wire and the cylindrical barrel by descending, pressing the cylindrical barrel with the electric wire inserted in the groove portion of the lower tooth block into which the electric wire has been inserted by four edges at both upper and lower grooves. It is.

Furthermore, consider also configured opposing grooves of the upper and lower teeth are more provided by the arrangement pitch and the same pitch of the cable connector contact of the con <br/> tact assembly
Can be

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, first, as an arrangement of contacts for a cable connector at the time of crimping, a large number of contacts are crimped simultaneously at a fixed pitch as a multi-core connector. A form in which a large number of contacts are inserted into a molded resin insulator at a constant pitch as an insert mold or press-fitted in a fixed arrangement as a contact assembly, and are crimped in a state where the contacts are attached to a contact carrier at a constant pitch. And other forms.

Next, the multi-core connector is configured in such a manner that a large number of contacts are fixed to the connector body in advance as a multi-core connector, and the electric wires are crimped in a state where they are fixed to the contact carrier at a constant pitch. A configuration in which the contact carrier is removed after inserting the contact carrier into each contact receiving portion of the connector housing;
There are various forms of crimping an electric wire in a state of a contact assembly and accommodating a plurality of contact assemblies in a connector housing.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an embodiment of a first contact 1 for a cable connector according to the present invention, in which wing portions projecting to both left and right sides in the longitudinal direction of a contact conductor are formed so as to be rounded from left and right, and both wing tip portions. Are overlapped to form a cylindrical barrel 1a. 1b is a contact portion with a mating connector pin.

FIG. 2 is an enlarged sectional view taken along the line AA in FIG. 1z is an overlapping portion of the blade tip, and 1c is a wire insertion space. Insert the wire into such a cylindrical barrel
When crimped, the overlapping part slides and the diameter of the barrel decreases.
It becomes smaller and tightens the wires. Therefore, crimp
The tool should have a simple recess as shown in FIG.
No. FIG. 3 is a diagram showing a cross-sectional structure of the crimping tool, where 3 is upper teeth, 4 is lower teeth, and a recess 5 is provided in each. At the time of crimping, the cylindrical barrel 1a in which the electric wire is inserted is placed in the concave portion 5 of the lower tooth 4, and the upper tooth 3 is lowered and pressed to crimp the electric wire 2 and the cylindrical barrel 1a.

[0023] in FIGS. 4 (a) is a cross sectional view showing a state of inserting the electric wire 2 that stripped coating cylindrical barrel 1a, (b) is a diagram showing a state after crimping, thus, crimping tool Is on
Simple, in the same position opposite the tooth block and lower tooth block
It may have only a simple concave portion. FIG. 5 is a perspective view in which the electric wire 2 is crimped to one first cable connector contact 1. FIG. 6 shows a state in which a plurality (five in the figure) of first cable connector contacts are attached to the contact carrier 6 at an equal interval P.

FIG. 7 shows a recess 5 facing the upper teeth 3 and the lower teeth 4.
Denotes a plurality of (five in the figure) crimping tools at a pitch P. Accordingly, if the electric wires are respectively inserted into the cylindrical barrels 1a of the contacts 1 for the cable connector shown in FIG. 6 and placed in the respective recesses 5 of the lower teeth 4 of the crimping tool shown in FIG. Crimping becomes possible. When a plurality of electric wires are crimped in this way, the result is as shown in FIG. The multi-core connector is configured by housing and fixing the contact to which the electric wire is crimped in the connector housing.

FIG. 9 is a view showing that the contact of FIG. 8 after the wire is crimped is inserted into the contact insertion hole 8 a of the connector housing 8. In this case, the contact insertion hole 8a
If the pitch is the same as the contact pitch P, it is preferable to insert the five contact carriers together with the contact carrier 6 into the contact insertion hole 8a, and then remove the contact carrier 6. If the pitch does not match, the contacts are first removed from the contact carrier 6 and inserted one by one. When the crimped contact is inserted and fixed in the contact insertion hole 8a and the connector hood 9 is attached, a multi-core connector as shown in FIG. 10 is completed.

In the above, a multi-core connector is formed by inserting the individual contacts to which the electric wires are crimped into the connector housing. The electric wires are connected to a multi-core connector on which a plurality of contacts are mounted in advance as shown in FIG. Crimping with a crimping tool is also possible. However, in this case, there is a limitation that the arrangement of the contacts cannot be multilayered due to the use of the crimping tool as shown in FIG. As a configuration for solving this problem, a configuration for forming a contact assembly is performed.

FIG. 11 is a perspective view of a contact assembly in which the first cable connector contact 1 of the present invention is fixed at a pitch P by insertion molding or press-fitting into a molded resin body 7. An electric wire is inserted into the cylindrical barrel 1a of each contact of the contact assembly, and is collectively crimped by a crimping tool shown in FIG.

FIG. 12 is a perspective view of the contact assembly to which the electric wires are collectively crimped. A resin insulating partition may be provided in the contact assembly of FIG. 12 in order to ensure insulation between the wire crimping portions.

FIG. 13 shows a structure in which five insulating partitions 12 are connected by a thin portion of the same molding resin at the corners of the molding resin body 7 .
And are integrally formed in a rotatably connected state. It can be lowered and raised in the direction of the arrow. When the wire is crimped, the wire is crimped as shown in FIG. 13, and after crimping is completed, the wire is crimped as shown in FIG. 14, so that the wire crimp portions are mutually insulated. Thus, the insulating partition is formed integrally with the molding resin body 7.
And it does not hinder wire crimping.
is there.

FIG. 12 shows a plurality of crimped wires.
Alternatively, the contact assembly shown in FIG.
As shown in FIG. 7, a multi-core connector is obtained by stacking and housing the connector housing 8. By attaching a connector hood to this, a multi-core connector as shown in FIG. 10 is obtained. Further, by arranging the contact assemblies also in the horizontal direction (lateral direction), a multi-core connector can be obtained. in this way,
Since a plurality of crimped wires are accommodated in the connector housing at the stage of contact assembly, an arbitrary multi-core connector can be configured.

The second cable connector contact of the present invention is formed so that the wing portions projecting to the left and right sides with respect to the longitudinal direction of the contact conductor and the edges of which are inclined in the same direction on the left and right sides are rounded from the left and right. A cylindrical barrel is formed such that the wing tips abut.

FIG. 16 shows wings before being formed into a cylindrical shape,
It is a figure which shows the cylindrical barrel formed by rounding this from right and left. When the wing of (a) is rounded, it becomes as shown in (a '), when the wing of (b) is rounded, it becomes as shown in (b'), and when the wing of (c) is rounded, it becomes (c ') Become like This
The contact part is spiral or zigzag like
And the edge of the recess hits the left and right wings and presses it.
Therefore, pressure bonding is ensured. The contact having the cylindrical barrel 1a formed in this way is shown in FIG.
The wires are inserted into the cylindrical barrel 1a at a constant pitch as shown in FIG. 1, and positioned at the position of the concave portion 13 of the crimping tool composed of the upper teeth 10 and the lower teeth 11 in FIG. When sandwiched between the teeth 10 and the lower teeth 11, the electric wire 2 and the cylindrical barrel 1a are crimped by the edge of the groove as shown in (b). Shape of recess 13
The shape can be simple as shown in FIG.
It may be of the same shape. The optimum number of pieces to be collectively crimped is determined from other design conditions. After being crimped, it is the same as in the case of the first cable connector contact.

[0033]

As described above, in the cable connector contact according to the present invention, the barrel for crimping the electric wire is formed in a cylindrical shape, and therefore, compared with the conventional upward V-shaped open barrel 16 as shown in FIG. First, the crimping tool
Conventionally, as shown in FIG. 19, the crimper 20 has a deep recess in which the width is widened downward and the width is reduced as going upward.
While the anvil assembly 21 has an anvil portion 19 protruding long corresponding to the concave portion, the crimping tool of the present invention can perform crimping only in the concave portion which is shallow in both the upper and lower sides as shown in FIG. 7 or FIG. is there. Also, the barrel wings are heavy
Cylindrical shape, or the contact part of both wings is spiral or zigzag
Crimper with a simple recess because it has a cylindrical shape
There is an advantage that a reliable crimping can be obtained with the tool.

As a result, the pitch P
When the crimping is performed with a conventional crimping tool, crimper 2
In contrast, in the crimping tool of the present invention, since the recess itself is shallow, even if the pitch P is reduced, the area between the recesses is reduced. Is hardly weakened. In this regard, when the pitch P is reduced to increase the density, there is an advantage that the restriction of the strength of the crimping tool is extremely reduced. Also, the cost of the tool is low because the crimping tool is simple
Longer life and longer dimensional control.
There is a point.

Second, as shown in FIG. 18, the conventional open barrel 16 has an upward V-shape before the wire is crimped, so that its width is larger than the outer diameter after the wire is crimped. On the other hand, in the case of the contact of the present invention, the outer diameter dimension (particularly the lateral dimension) before and after the wire crimping is performed.
Is almost unchanged. As a result, when the outer diameter dimension after crimping is substantially the same, the width dimension of the barrel before crimping is naturally smaller in the barrel of the contact of the present invention. This has the advantage that the contact for the cable connector of the present invention can realize a smaller pitch, that is, a high-density multi-core connector as compared with the conventional one, even from the dimensions of the barrel.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a first cable connector contact of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of the cylindrical barrel 1a of FIG.

FIG. 3 is a sectional structural view of the crimping tool of the present invention.

FIG. 4 is a sectional view showing a state where an electric wire is inserted into the cylindrical barrel 1a and a sectional view after crimping.

FIG. 5 is a perspective view in which an electric wire is crimped to one first cable connector contact.

FIG. 6 is a perspective view showing a state where a plurality of first cable connector contacts are attached to a contact carrier at a pitch P;

FIG. 7 is a cross-sectional view of the crimping tool of the present invention in which a plurality of opposing concave portions are provided at a pitch P.

8 is a perspective view showing a result of crimping an electric wire to the contact shown in FIG. 6 using the crimping tool shown in FIG. 7;

FIG. 9 is a perspective view in which the contact of FIG. 8 after the wire is crimped is inserted into the contact insertion hole of the connector housing.

FIGS. 10A and 10B are a front view and a plan view of a multi-core connector configured by inserting a wire crimped contact into a contact insertion hole of a connector housing and attaching a connector hood.

FIG. 11 is a perspective view of a contact assembly in which a plurality of first contacts for a cable connector of the present invention are fixed to a molded resin body at a pitch P.

FIG. 12 is a perspective view of the crimping tool of FIG. 7 when the wire crimping is completed on the contact assembly of FIG. 11;

FIG. 13 is a perspective view showing a state in which an insulating partition is rotatably provided in connection with the molded resin body of FIG. 11;

FIG. 14 is a partially cutaway perspective view showing a state where an insulation partition is lowered after wire crimping is performed on the contact assembly of FIG. 13;

FIG. 15 is a side sectional view of a multi-core connector configured by stacking and housing the wire crimp contact assembly of FIG. 12 or 14 in a connector housing.

FIG. 16 is a perspective view of a wing portion before forming a cylindrical barrel of a contact for a second cable connector of the present invention and a cylindrical barrel formed by rolling the wing portion.

FIG. 17 is a cross-sectional view showing a state where the electric wire inserted into the cylindrical barrel of the second cable connector contact of the present invention is crimped by a fourth crimping tool.

FIG. 18 is a perspective view of a conventional connector assembly.

FIG. 19 is a cross-sectional view of a conventional crimping tool for simultaneously crimping electric wires to open barrels of contacts arranged in a line.

20 is a perspective view showing a state after electric wires are crimped to the connector assembly of FIG. 18;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact for 1st cable connector 1a Cylindrical barrel 1b Contact part 1c Electric wire insertion space 1z Overlapping part 2 Electric wire 3 Upper tooth 4 Lower tooth 5 Depression 6 Contact carrier 7 Molded resin body 8 Connector housing 8a Contact insertion hole 9 Connector hood 10 Upper teeth 11 Lower teeth 12 Insulating partition 13 Recess 14 Contact 15 Contact part 16 Open barrel 17 Cavity 18 Crimper part 19 Anvil part 20 Crimper 21 Anvil assembly

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-62380 (JP, A) JP-A-6-208858 (JP, A) JP-A-4-129181 (JP, A) JP-A-3-3 165478 (JP, A) Japanese Utility Model Showa 55-77369 (JP, U) Japanese Utility Model Showa 62-120290 (JP, U) Japanese Patent Publication No. 55-37069 (JP, B1) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01R 4/18 H01R 43/048

Claims (6)

(57) [Claims] The present invention is characterized in that the contact conductor has a barrel formed into a cylindrical shape such that wing portions projecting to both left and right sides in the longitudinal direction of the contact conductor are rounded from the left and right, and both wing tip portions overlap. Contact for cable connector. 2. A cylindrical shape in which the wing portions projecting to both left and right sides with respect to the longitudinal direction of the contact conductor and whose edges are inclined in the same direction in the right and left direction are rounded from the left and right, so that both wing ends come into contact with each other. A contact for a cable connector having a barrel formed in a shape. 3. The cable connector according to claim 1, wherein
Mold for multiple contacts at equal intervals
Or press-fit into molded resin insulators fixedly arranged at high density,
Of the arranged plurality of cable connector contacts.
Molded resin that separates the wire crimping parts between each barrel
Insulation secures contacts for cable connector
Thin with rotatable hinge function with respect to molded resin insulator
Characterized by being integrally formed through a meat portion
Contact assembly. 4. The connector housing according to claim 3, wherein:
Of multiple contact assemblies
And a multi-core cable connector. 5. The method according to claim 1, wherein the two surfaces are located at the same position facing each other.
Press and approach the upper and lower tooth blocks with concave
The upper tooth block and the lower tooth block
The hollow portion formed by inserting an electric wire.
Upper teeth that become the shape after crimping the contact for cable connector
It consists of a block and a lower tooth block
Crimping tool. 6. The same position facing each other on an opposing surface.
3. A cylindrical contact member for a cable connector according to claim 2.
With a narrower groove in the barrel direction than the diameter of the barrel
The upper tooth block consists of a lower tooth block and an upper tooth block.
Of the lower tooth block by lowering with pressure
Up and down the cylindrical barrel with the electric wire inserted
Press the wire and cylindrical barrel at four places with the edge of the groove
A crimping tool characterized by turning.