JPH0719092Y2 - High density plug and jack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a high-density plug and a combination of the plug and a mating jack, and particularly, simplifies assembly and improves productivity.

"Problems to be solved by conventional techniques and devices" The conventional work of connecting a multi-core cable and a plug has not been easy. That is, as shown in FIG. 6, first, the outer jacket of the end of the cable 1 is peeled off by a predetermined length to expose a large number of cords 1a, and the tip of each cord 1a is peeled off by a predetermined length. , Exposing the core wire (aggregate of many metal wires) 1b,
The pin contacts 2 are crimped to each, and each pin contact 2 is inserted into the pin accommodating hole of the body 3 of the plug. The management points that you should be aware of in this connection work are
(A) Do not scratch the core wire 1b when separating the coating of the cord 1a, (b) the peeling length of the coating (Fig. 7A), and (c) a part of the coating to be peeled on the edge of the coating. Do not leave it (Fig. 7B), (d) Position where the pin contact 2 is crimped to the core wire 1b (Fig. 7C), (e) Clip height h and width w after crimping the pin contact 2 (FIG. 7D), and so on. If any one of these points is wrong, the product is considered defective, and therefore, although the work of connecting the cord and the pin contact may seem simple at first glance, it is actually a very troublesome work for the worker and the inspector.

Speaking of the other end jack to which the plug should be connected,
Since the shape of the socket contact that fits with the pin contact 2 is generally a complicated shape that wraps around the pin contact, the number of steps in the press working increases, the productivity is not sufficient, and There was a problem that the number of types increased and the investment related to production equipment became relatively large.

An object of the present invention is to solve these conventional drawbacks and to provide a plug in which connection work between a pin contact and a cord is easy, or a combination of a simple jack having the shape of the plug and the socket contact.

"Means for Solving the Problem" (1) In the high-density plug according to the invention of claim (1), a stepped portion that is raised one step at a time from the front to the rear of a rectangular parallelepiped body made of synthetic resin is formed. Corresponding to the step portion, a plurality of cord insertion holes are formed in a line in the width direction of the body at a predetermined pitch, and are formed in the front-rear direction from the rear surface of the body to the vicinity of the front surface of each step portion. A plurality of contact grooves are formed side by side in the width direction of the body at the predetermined pitch at the corners of the portion, and contact insertion holes are formed on the bottom surface of each of the contact grooves.
The cord is inserted into each of the cord insertion holes, the cord is inserted into each of the cord insertion holes of the body, and the arrow-shaped contacts having a pair of sharp projections at the tips are press-fitted into the contact insertion holes and the arrow-shaped contacts are formed. The top portion of the contact is housed in the contact groove, and the sharp projections of the arrow-shaped contact project into the cord and are electrically connected to each other, and the cord is pressed into the cord insertion hole.

(2) The high-density plug and the jack according to claim (2) are a combination of the high-density plug according to the above (1) and the following high-density jack.

In the high-density jack that fits into the above-mentioned high-density plug, the height of the opening is gradually reduced as it goes deeper on the front surface of the rectangular parallelepiped body made of synthetic resin, and the plug insertion hole is formed. Corresponding to each step above or below the plug insertion hole,
A plurality of contact insertion holes are arranged at a predetermined pitch in the width direction of the body and formed so as to penetrate from the front surface of each of the step portions to the rear surface of the body, and the front surface of each of the step portions and an inner surface perpendicular to the front surface thereof. Across
A plurality of contact grooves are arranged in the width direction of the body at the predetermined pitch and communicate with the contact insertion holes, respectively, and are formed along the front-rear direction. The contact insertion holes have a wire shape made of a metal elastic body. The contact is inserted, and the portion of the wire-like contact that protrudes forward from the contact insertion hole is folded back along the contact groove.

When the above-mentioned high-density plug is inserted into the plug insertion hole of the above-mentioned high-density jack, the contact grooves of each step of the plug and the jack are closely opposed to each other, and the folded end portions of the wire-like contacts are the plugs. Engaging with the contact groove of the above and elastically contacting the top portion of the arrow-shaped contact.

[Embodiment] High Density Plug A high density plug 100 of the present invention will be described with reference to FIGS. 1 and 2. A step portion 4a, which rises one step at a time from the vertical center of the front end of the rectangular parallelepiped body 4 made of synthetic resin to the rear of the upper surface and the lower surface of the body, forms a horizontal plane (hereinafter referred to as a reference horizontal plane) that bisects the upper and lower sides of the body. It is formed substantially vertically symmetrical with respect to the reference. Corresponding to each step 4a, a plurality of cord insertion holes 4b are formed in a row in the width direction of the body at a predetermined pitch, and are formed in the front-back direction from the rear surface of the body 4 to a position near the front surface of each step 4a. . A plurality of contact grooves 4c are provided at the corners of each step 4a.
Are formed in the width direction of the body 4 along the front-rear direction at the same pitch as the cord insertion holes 4b and at a predetermined pitch.

A contact insertion hole 4d is formed on the bottom of each contact groove 4c.
Are formed in communication with the cord insertion hole 4b. Guide grooves 4e are formed on both side surfaces of the body 4 in the front-rear direction from the front surface to the rear surface of the body 4 with the guide grooves 4e slightly displaced upward from the vertical center of the body 4. Jettys 4f are formed at the centers of the upper surface and the lower surface of the body 4 so as to project symmetrically along the width direction of the body 4. A pair of left and right locking holes 4g are formed at the rear ends of the upper surface and the lower surface of the body 4, respectively.

A shield case 5 is provided to cover a portion of the body 4 behind the step 4a. The shield case 5 is formed into a box shape having an opening on the front surface by punching out and bending a metal plate. Small holes 5a are formed on the rear surface so as to face the respective cord insertion holes of the body 4.

A pair of left and right lances 5b are provided near the rear edges of the upper and lower surfaces.
It is cut and raised inside. Further, a T-shaped cable retainer 5c is formed to project from the rear edge of the lower surface. A square hole 5d is formed at a position facing the guide groove 4e of the body at a position slightly above the center near the front edges of both side faces.

When the shield case 5 is press-fitted around the rear half of the body, the front edge of the shield case 5 abuts the jetty 4f of the body, and the lance 5b engages with the locking hole 4g to prevent it from coming off.

The outer jacket of the end of the cable 1 is peeled off for a predetermined length, the shield 1f is turned over to expose the cord 1a, and the tip of the shield 1c is gathered in one place and soldered near the base of the cable retainer 5c. . Insert each cord 1a through the small hole 5a of the shield case into a predetermined cord insertion hole 4b until the tip of the cord comes into contact with the end of the hole, and the arrow-shaped contact 6
Through the contact groove 4c to the contact insertion hole 4d (first
(Fig.)

The arrow-shaped contact 6 is a plate-shaped terminal, and a top 6a whose upper edge is curved in a convex shape and a body 6b which is lowered almost vertically downward from the center of the top to form a body 6b, and the tip of the body 6b is bifurcated. Is
A sharp projection 6c is formed at the tip of each branch piece. When the arrow-shaped contact 6 is press-fitted into the contact insertion hole 4d, the pair of sharp protrusions 6c pierce the coating of the cord 1a and bite deeply into the core to be electrically connected to each other, and the cord 1a is inserted into the cord insertion hole 4b. It is pressed against the peripheral surface. A constricted portion is formed by both side edges of the body portion 6b of the arrow-shaped contact 6 and the lower edge of the top portion 1a connected thereto and the shoulder portion of the sharp protrusion 6c, and the peripheral wall of the contact insertion hole 4d engages with the constricted portion, and The contact 6 is prevented from coming off easily. Top 6a
Are accommodated in the contact groove 4c. The top edge of the top portion 6a slightly sinks into the groove.

Place both arms of the cable retainer 5c along the outer peripheral surface of the cable 1,
Bend the tip so that it cuts into the jacket and crimp it to the cable.

Assembling is completed by covering the shield case 5 and the connecting portion between the cable 1 and the body 4 with the cover 7. An engaging protrusion (not shown) formed on the inner surface of the cover 7 engages with a hole formed by cutting and raising the lance 5b of the shield case 5 to prevent it from coming off.

High Density Jack A high density jack 200 that fits in the above high density plug will be described with reference to FIGS. 1, 3 and 4. On the front surface of the rectangular parallelepiped body 8 made of synthetic resin, the height of the opening is gradually reduced as it goes deeper, and a plug insertion hole is formed.
8a is formed. Each step above or below the plug insertion hole
Corresponding to 8b, a plurality of contact insertion holes 8c are formed on the body 8
Are formed in the front-rear direction by penetrating from the front surface of each step portion to the rear surface of the body 8 side by side with a predetermined pitch in the width direction. A plurality of contact grooves 8d are arranged in the width direction of the body 8 at the above-mentioned predetermined pitch over the front surface of each stepped portion 8b and the inner surface perpendicular to the front surface, communicate with the contact insertion holes 8c, and form the front and rear of the body. It is formed along the direction. Jettys 8e (Fig. 3) are formed on the inner surfaces of both side walls of the body 8 so as to face each other in the front-rear direction.

In this example, the wall portion of the rear surface of the body 8 is deeply shaved step by step as it goes downward from above at the position of the contact insertion hole 8c in each step to form a step 8f. The length of the contact insertion hole 8c in the front-rear direction becomes shorter step by step as it gets closer to the contact surface of the plug insertion hole 8a than the upper step or the lower step of the step portion 8b.

The wire-shaped contacts 9 to be inserted into the contact insertion holes 8c of each step are made of a metal elastic body, and these contacts are arranged in parallel at the same pitch as the pitch of the contact insertion holes, and one end thereof is welded to the connecting bar 9a, for example. It The contact 9 is bent at a substantially right angle in the middle portion, and the lengths in the vertical direction and the front-back direction are determined for each step.

The wire-shaped contacts 9 are inserted into the contact insertion holes 8c from the rear surface of the body 8 for each step. That is, the vertical portion of the contact that is connected to the bending point of the contact 9 is inserted until it comes into contact with the rear surface of the step portion 8f provided at the rear of the body 8. The tip of each contact 9 projects forward from the contact insertion hole 8c by a predetermined length. The protruding portion is folded back along the contact groove 8d. The tip of the contact 9 projects from the contact groove 8d into the plug insertion hole 8a.

A box-shaped shield case (10) made of metal and having an open front and bottom is provided, and a pair of left and right claws (10a) are formed on the front edge of the shield case (10) so as to project forward and then bent inward into the case. Mounting feet 10 on the lower edges of both sides of the case
b is formed to project downward, a square hole 10c is formed at the rear end, and a pair of lances 10d is formed at the upper end.

The shield case 10 is press-fitted from above the body 8 to lock the lance 10d in the locking hole 8f.

A box-shaped cover (11) made of synthetic resin and having an open front and bottom is provided, and is attached to the shield case (10) from above. Although not shown, engaging projections are formed on the inner surfaces of both side plates of the cover 11, and for example, the lance 10 of the shield case 10 is formed.
Engage with the recess created by cutting and raising d.

The tip of the contact 9 formed by cutting off the connecting bar 9a projects downward from the lower surfaces of the shield case 10 and the cover 11 to form a terminal portion 9b.

A contact holder 12 is provided as needed so that the contact 9 extending downward at the rear of the body 8 can be safely held and the terminals 9b can be accurately positioned. The contact holder 12 is made of synthetic resin and has a stepped portion 12a formed on the front surface so as to engage with the stepped portion 8f on the rear surface of the body. On the front surface of each stepped portion 12a, contact grooves 12b that engage with the contacts 9 are formed in a row at a predetermined pitch in the width direction and along the up-down direction. The contact grooves 12b are extended downward to form contact insertion holes 12c is formed by vertically penetrating the holding body 12. Protrusions 12 on the rear end of both sides of the holder 12.
d is formed protruding. A predetermined contact 9 is inserted into each contact insertion hole 12c, and the step portion 12a of the contact holder 12 is inserted.
While engaging the stepped portion 8f of the body 8 with the left and right protrusions 12
The d is locked in the square hole 10c of the shield case 10. As a result, the assembly of the jack 200 is completed.

High Density Plug and Jack When the plug 100 of FIG. 2 and the jack 200 of FIG. 3 are combined, the guide groove 4e of the plug is engaged with the jetty 8e of the jack so that the positions of the two plugs are aligned. The step portion 4a of the plug is fitted into the plug insertion hole 8a of the jack, and the left and right claws 10a of the jack are engaged with the square hole 5d of the plug. Guide groove 4
Since the e and the jetty 8e are displaced upward from the vertical center of the body 4 or the plug insertion hole 8a, respectively.
Incorrect insertion of 100 up and down is not possible.

When the plug and the jack are combined, the contact groove 4c of the plug and the contact groove 8d of the jack closely face each other, and the folded end of the wire-shaped contact 9 engages with the contact groove 4c of the plug and the arrowhead of the plug. Elastic contact with the upper edge of the top portion 6a of the circular contact. The contact groove 4c of the plug also serves as a guide groove for the end portion of the wire-shaped contact 9, and the end portion of the wire-shaped contact 9 does not come off from the contact groove 4c even when subjected to vibration or shock. Vibration resistance is improved.

Modifications In the above-described embodiments, the step portion 4a of the plug and the step portion 8b of the jack are vertically symmetrical, but the present invention is not limited to this case, and may be vertically asymmetrical, or the upper half or the lower half. Only half is required.

In the embodiment of the jack shown in FIG. 3, the step portion 8f is provided on the rear surface, but it is not always necessary. If there is no step 8f, in most cases the wire-shaped contact 9 is not bent in an inverted L shape and is projected rearward from the rear surface.

In the embodiment of FIG. 3, the contact holder 12 can be omitted.

"Effect of device" With the plug of this device, the cord 1a is directly inserted into the cord insertion hole 4b without peeling off the coating, and the arrow-shaped contact 6 is inserted.
By simply press-fitting into the contact insertion hole 4d through the contact groove 4c, the contact and the cord can be connected very easily, and a large number of control points at the time of connection work unlike the conventional case are unnecessary.

Further, in the jack to be fitted with the plug of the present invention, an extremely simple wire-shaped contact 9 can be used instead of the complicated socket contact having the conventional shape. Therefore, in any case, the productivity can be dramatically improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing a fitted state of a plug and a jack of the present invention, FIG. 2 is a view showing a process of assembling the plug of the present invention, and FIG. FIG. 4 is a vertical sectional view of the body 8 of FIG. 3 with the wire-shaped contacts 9 attached, and FIG. 5 is a state in which the plug 100 of FIG. 2 is fitted to the jack 200 of FIG. FIG. 6 is a perspective view showing a conventional plug assembly process, and FIG.
The figure is a view for explaining a management point to be noted in the work of connecting the pin contact and the cord of the conventional plug.

Claims (2)

[Scope of utility model registration request] 1. A rectangular parallelepiped body made of a synthetic resin is formed with a step portion which rises one step at a time from the front to the rear, and a plurality of cord insertion holes are formed at a predetermined pitch corresponding to each step portion. Are formed in the front-rear direction from the rear surface of the body to the vicinity of the front surface of each step, and a plurality of contact grooves are formed at the corners of each step at the predetermined pitch. Contact holes are formed on the bottom surface of each contact groove.
The cord is inserted into each of the cord insertion holes, the cord is inserted into each of the cord insertion holes of the body, and the arrow-shaped contacts having a pair of sharp projections at the tips are press-fitted into the contact insertion holes and the arrow-shaped contacts are formed. A high density plug in which the tops of the contacts are housed in the contact grooves, and the sharp projections of the arrow-shaped contacts project into the cords and are electrically connected to each other, and the cords are pressed into the cord insertion holes. 2. A high-density plug according to claim 1 and a high-density jack (combination) fitted to the plug, wherein the high-density jack is formed on a front surface of a rectangular parallelepiped body made of synthetic resin, The height of the opening is gradually reduced as it goes deeper to form a plug insertion hole, which corresponds to each step above or below the plug insertion hole.
A plurality of contact insertion holes are arranged at a predetermined pitch in the width direction of the body and are formed so as to penetrate from the front surface of each of the step portions to the rear surface of the body, and on the front surface of each of the step portions and the inner surface perpendicular to the front surface. Across
A plurality of contact grooves are arranged in the width direction of the body at the predetermined pitch and communicate with the contact insertion holes, respectively, and are formed along the front-rear direction. The contact insertion holes have a wire shape made of a metal elastic body. The contact is inserted, and a portion of the wire-like contact that protrudes forward from the contact insertion hole is folded back along the contact groove, and the high-density plug according to claim (1) is plugged into the high-density jack. When inserted into the insertion hole, the contact grooves of each step of the plug and the jack closely oppose each other, and the folded end of the wire-shaped contact engages with the contact groove of the plug and the arrow-shaped contact of the contact. High density plugs and jacks that make elastic contact with the top.