JPS6017801Y2 - contact - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to improvements in contacts provided in connectors.

Conventional contacts of this type generally have the following structure, as shown in Figure 1:
It is integrally formed by arranging in series a pin contact part 1 into which a pin (not shown) is inserted and removed, and a fixing part 2 into which a lead wire (not shown) is connected and fixed by caulking. A pair of pin contact pieces 1b, l extend forward from the front end of the rising portion 1a, la of the U-shaped fixed wall in the direction of removal of the pin.
The pin contact pieces 1b, 1b are configured to extend in opposite directions with a tapering interval, and the pin can be inserted and removed between the pin contact pieces 1b and 1b using its own elasticity.

Each of the fixing parts 2 is composed of a U-shaped crimping part 2a and a support part 2b connected in series, and the exposed wire part of the lead wire is caulked and crimped to the crimping part 2a to make an electrical connection. At the same time, the covering portion of the lead wire is similarly crimped and supported by the support portion 2b.

However, in the conventional contact having such a configuration, the total length 1□ of the pin contact portion 1 is not enough to properly elastically deform the pin contact pieces 1b, lb in response to the insertion and removal of the pin. Although it cannot be made smaller than a certain level, and the total length of the fixed portion 2 is 1°, which is not the case in the case of the pin contact pieces 1b and lb, it should not be made too extreme in order to ensure a sufficient connection of the lead wire. It cannot be made smaller.

In particular, if the total length 1□ of the pin contact portion 1 (especially the length of the pin contact piece 1b) is made too small, sufficient pin holding force may not be obtained, or the pin may be inserted or removed due to variations in the pin diameter due to machining accuracy. Functional problems are likely to occur, such as the force required to change widely.

Therefore, this, combined with the fact that the pin contact part 1 and the fixing part 2 are arranged in series, makes the contact extremely heavy by making the total length (11-)-1°) as small as possible. Therefore, it cannot be used for ultra-small connectors, which are in strong demand these days.

Moreover, since both pin contact pieces 1b and lb are in a free state in the direction in which the opposing distance is widened and are not supported in any way, the structure is weak against so-called stiffness that occurs when the pin is inserted and removed. be.

The present invention was developed in view of the above circumstances, and it solves the functional problem of conventional contacts, such as their weakness in terms of rigidity, while making it possible to form a raised shape, and without any support for mass production. It provides contact that does not result in

Next, one embodiment will be described with reference to FIGS. 2 to 8.

This embodiment is an example in which a female connector 12 is equipped with a contact 11 according to the present invention, and a pin 14 of a female connector 13 is inserted into and removed from the female connector 12.

The contact 11 is a pin contact portion 1 into which the pin 14 is inserted and removed.
5 and a fixing part 17 for connecting and fixing the lead wire 16 are arranged in parallel and integrally molded.

The pin contact portion 15 includes a pair of support portions 18a+18a that are directly opposed to each other with a predetermined interval apart, and both support portions 18a, 18a.
A fixed wall 18 that is U-shaped in rear view and includes a supporting wall portion 18b that is continuous between one side edge and extends rearward from the rear end of the supporting portions 18a, 18a, and a front end of each supporting portion 18a. It consists of a pair of pin contact pieces 19 and 19 that are arranged in a row opposite to each other in the insertion direction of the pin 14 which is rearward.

Each pin contact piece 19 extends from the front end of each support portion 18a of the fixed wall 18 by folding the portion of the fixed wall 18 at an acute angle rearward so that the opposing distance between the two pin contact pieces 19, 19 is sequentially narrowed rearward. It is formed by bending, and its front-to-back length is set to be approximately the same as that of the support portion 18a.

Further, at the front end of the support wall portion 18b, a locking tongue piece 20 is provided on the side.
is installed protrudingly.

Then, a first extension part 21 is provided continuously from the lower side surface of the rear end of the support wall part 18b to face the one support part 18a, and further extends from the side edge of the first extension part 21 to the side of the pin contact part 15. A second extension part 22 is provided which is slightly inclined in the direction, and a fixing part 17 is provided in succession to the extending end of this second extension part 22 .

The fixing part 17 is formed by a U-shaped support part 23 connected to the side end of the second extension part 22, and a U-shaped crimp part 24 connected to the front end of the support part 23, The pin contact portion 15 is disposed directly opposite to the pin contact portion 15, and the end portion of the lead wire 16 is brought to the crimping portion 24 with its exposed wire portion 16a and its rising portions inward. The covering part 1 is caulked and crimped to make it conductive (Fig. 6).
6b is fixedly supported by caulking the rising portion of the support portion 23 inward (FIG. 7), so that it can be firmly connected and fixed in an electrified state.

Note that the crimp portion 24 has an appropriate number of protrusions 24a, 24b...
* is formed in order to improve adhesion of the exposed wire portion 16a of the lead wire 16.

By the way, it goes without saying that the contact 11 having the above structure can be easily formed by pressing a highly conductive metal plate cut into the developed shape, but the pin contact portion 15 and the fixed portion 17 are are arranged in parallel, a large number of contacts 11.11 are arranged in parallel as follows.
... can be manufactured satisfactorily while improving manufacturing efficiency.

That is, as shown in FIG.
The contacts 11 are formed by cutting the original plate into a shape in which they are arranged in parallel in the longitudinal direction via the contact plates 5a, and pressing each contact development shape portion of this original plate into the above-described shape.

Then, after connecting and fixing the lead wires 16 to the fixed portions 17 of each contact 11, the contact 11, that is, the first
Each connection line 26 portion between the extension portion 21 and the narrow width portion 25a is cut.

According to such a molding method, a large number of contacts) 11,
11... can be manufactured satisfactorily while improving manufacturing efficiency. Furthermore, the work of connecting and fixing lead wires, which is difficult with small contacts, can be carried out with each contact 11...
This can be done easily and favorably in a state where the connecting portion 25 is connected and supported.

Next, the connector case 27 that houses a predetermined number of contacts 11 configured as described above and constitutes the female connector 12 will be described.

The connector case 27 is partitioned in the left and right direction by a predetermined number of partition walls 28, 28, and each space surrounded by the opposing partition walls 28, 28 is partitioned by a support wall 29, and the upper Contact 11 for each chamber parallel to the side.
A rectangular box shape with an open rear is formed in a first storage chamber 30 for storing the pin contact portion 15 and a second storage chamber 31 for storing the fixed portion 17 in parallel chambers on the lower side. Molded.

A pin hole 32a for inserting the pin 14 is formed in the front wall 32 portion of each first storage chamber 30, and the earthen wall portion that is the upper surface of each first storage chamber 30 is Each of the locking walls 33 has a substantially U-shaped opening formed therein and has a slight distance from the front wall 32.

A groove 33a extending forward from the rear end is formed on the inner surface of each locking wall 33.

Furthermore, a notch-shaped engagement groove 19a extending forward from the rear end is formed in one side end portion of each support wall 29 that partitions each first storage chamber 30 and second storage chamber 31.

Therefore, the female connector 12 has a predetermined number of contacts 11, 11, . ing.

) are respectively fitted into the second storage chambers 31 and housed in the connector case 27.

Each pin contact portion 15 is fitted into the first storage chamber 30 with its locking tongue piece 20 engaged with the recess 133a of the locking wall 33, and finally the locking tongue piece 20 is recessed. It comes off from the groove 33a and is engaged with the front end of the locking wall 33, thereby being housed in the first storage chamber 30 in a non-removable manner (FIG. 5).

At this time, each locking wall 33 is elastically deformed upward,
The locking tongue piece 20 can be smoothly moved from the groove 33a to the front end of the locking wall 33.

When the pin contact portion 15 is stored in the first storage chamber 30, the support portion 18a and the supporting wall portion 18b of the fixed wall 18 are supported in contact with the partition wall 28 and the locking wall 33, respectively. Both pin contact pieces 19.19 are properly connected to the pin hole 32a.

Furthermore, the first and second extensions 21.22 that connect the pin contact portion 15 and the fixed portion 17 are connected to the engagement groove 29a of the support wall 29.
is engaged with.

In this way, each contact 11 is connected to the connector case 2.
It is securely stored in the first and second storage chambers 30 and 31 of No. 7.

Further, the female connector 13 has pins 14, 14, . 14 is inserted between the pin contact pieces 19, 19 of each contact 11 through the pin hole 32a, so that it can be removably connected to the female connector 12.

In this connected state, the semi-cylindrical locking pieces 34.34 protruding from both side walls of the female connector 12 are attached to the retaining parts 35.35 formed on both side walls of the female connector 13. are engaged using the elasticity of both connectors 12 and 13.
This is to prevent the connection from being unexpectedly canceled (Figure 8).
.

With the above configuration, the pin contact portion 15 and the fixed portion 1
7 are arranged in parallel, the total length of the contact 11 can be greatly reduced compared to the case where both parts 15 and 17 are arranged in series.

By the way, the fixing part 17 that connects and fixes the lead wire 16 is
Although it can be reduced to some extent within the range where the lead wire 16 can be connected and fixed, the pin contact portion 1 where the pin 14 is inserted and removed.
5. In particular, the pin contact piece 19 cannot be extremely reduced in size in order to properly maintain the holding force of the pin 14.

However, in the contact 11 according to the present invention,
Each pin contact piece 19 does not protrude forward from the fixed wall 18 as in the conventional case, but is bent rearward from the front end of the fixed wall 18, that is, each support portion 18a, and overlaps with the fixed wall 18 in the front-rear direction. Pin 14 because it's important
Even if the length of the pin contact portion 15 is increased beyond a certain level to ensure sufficient holding force, the total length of the pin contact portion 15 is greatly reduced compared to the conventional one.

Therefore, as can be understood from the above, in the contact 11 according to the present invention, the entire length of the pin contact piece 19.19 can be set to such an extent that the holding force of the pin 14 can be maintained properly. , the total length of the contact 11 as a whole, that is, the length in the front-rear direction, can be greatly reduced, making ultra-miniaturization possible.

Therefore, it can be adopted as an ultra-miniaturized female connector 12, and the total size of both connectors 12 and 13 in the connected state can be reduced, so that a so-called low profile can be achieved.

Furthermore, in the connected state of both connectors 12.13, the interval between both pin contact pieces 19.19 is elastically widened by insertion of pin 14 (Fig. 8), but at this time,
Each pin contact piece 19 is received and supported by the fixed wall 18, that is, each support portion 18a, in order to restrict its expansion within a certain range, so that it can be prevented from being easily damaged by the sharpness that is likely to occur when the pin 14 is inserted or removed. There is no fear that each pin contact piece 19 will unexpectedly be plastically deformed beyond its elastic limit due to this supporting force.

Further, both pin contact pieces 19.19 are connected to each support portion 18a, 1
The pin 8a is bent backward from the front end, and the distance between the pins 8a and 8a is gradually narrowed toward the rear, so even if the diameter of the pin 14 varies due to processing accuracy problems,
Regardless of this variation, changes in the force required to insert and remove the pin 14 are extremely small.

Note that the structure of the contact according to the present invention is not limited to the above-mentioned embodiment. For example, the pin contact portion 15 may be structured as shown in FIGS. 9 and 10, and The same effects as in the embodiment can be achieved.

That is, in FIGS. 9 and 10, the fixed wall 18
The pin contact portion 15 is formed by bending four pin contact pieces 19, 19, . . . radially inward from the front end of the fixed wall 18.

In this way, due to the configuration of the pin contact portion 15, the pin contact piece 19
The number of pin contact pieces 19, 19 can be set arbitrarily, and the point is that the spacing between at least one pair of pin contact pieces 19, 19 is tapered in the insertion direction of the pin 14 in order to hold the pin 14 well. It is sufficient that the deformation of the pin contact piece 19 is restricted within a certain range by at least a portion of the fixed wall 18q').

In any case, as is clear from the above description, the contact of the present invention includes a pair of support parts facing each other with a predetermined interval apart, and a pair of support parts facing each other with a predetermined interval apart, in forming a pin contact part into which a pin is inserted and removed. a supporting wall extending rearward from the rear ends of the support parts; and a support wall part extending rearward from the rear ends of the support parts; at least one pair of pin contact pieces attached to the support wall, and an extending portion extending in a direction perpendicular to the support wall on the lower side surface of the rear end of the support wall of the pin contact portion. Since the extension end of the extension part has a fixed part for connecting and fixing the lead wire parallel to the pin contact part, the pin contact part and the fixed part are arranged in series as in the conventional case. The total length can be greatly reduced compared to the conventional one, and it is possible to achieve ultra-miniaturization.

Moreover, since each pin contact piece does not protrude forward from the support part and is arranged in an overlapping manner inside the support part, the entire length of each pin contact piece can be used to reduce the holding force of the pin while making the contact ultra-small. It can be set to a level that can be maintained properly, and therefore there is no risk that the function of the contact will be impaired by making the contact ultra-small.

Furthermore, since the expansion of each pin contact piece due to the insertion of the pin is regulated by the fixed wall, the structure is strong against the damage caused by the insertion and removal of the pin, which is extremely advantageous in terms of the function of the contact. .

In addition, the structure of the contact of the present invention includes a support part, a support wall part,
In order not to hinder mass production in forming the pin contact piece, extension part, and fixed part, in other words, to automate the production of contacts, the production rate of contacts can be increased. It is practically extremely effective in that it does not cause any deterioration at all.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional contact, FIGS. 2 to 8 show an embodiment of the contact according to the present invention, FIG. 2 is a perspective view showing the state of the contact immediately after molding, and FIG.
The figure is a vertical perspective view of the connector case, Figure 4 is a cross-sectional plan view of a female connector configured by housing contacts in the connector case (the cross section is taken along line IV-IV in Figure 5), and Figure 5 is Figure 4 is a cross-sectional view taken along the ■-V line, Figure 6 is VI in Figure 5.
-VI line sectional view, FIG. 7 is a sectional view taken along ■-■ line in FIG. 5, and FIG. 8 is a cross-sectional plan view corresponding to FIG. FIG. 9 is a partially cutaway vertical side view showing another embodiment of the contact, and FIG. 10 is a cross-sectional view taken along the line X--X in FIG. 9. 11...Contact, 14...Pin,
15...Pin contact part, 16...Lead wire, 17...Fixed part, 18...Fixed wall, 19...Zen contact piece .

Claims (1)

[Scope of utility model registration request] In forming a pin contact portion through which a pin is inserted and removed, a pair of supporting portions facing each other at a predetermined interval, and a portion extending between one side edge of both supporting portions and extending from the rear end of both said supporting portions are formed. a support wall portion extending rearward; and at least a pair of pin contact pieces each bent rearward from the front end of each of the support portions and successively narrowing toward the rear; Forming an extension part extending in a direction perpendicular to the support wall part on the lower side surface of the rear end of the part, and connecting and fixing a lead wire parallel to the pin contact part to the extension end of the extension part. A contact characterized by forming a fixed portion of.