JPS6226925Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press-contact type contact that has high reliability when mating with a mating terminal and can be simultaneously assembled into a housing when assembling a connector.

Conventionally, there are soldering or crimping methods for connecting electrical wires to contacts for connectors, but in both of these methods, the insulation coating at the end of the electrical wire is pre-coated to a certain level. It is necessary to remove only the dimensions, and the work is complicated. Therefore, recently, a press-fitting groove with a width slightly smaller than the conductor diameter of the electric wire is provided in the contact, and by press-fitting the electric wire with the insulation coating attached to the groove, the insulation coating that is in contact with the end surface on both ends of the groove is broken. A so-called press-contact type contact is used, which has a structure in which the conductor is exposed and the end face and the conductor are pressed into contact with each other, so that an electrical connection can be obtained more easily and reliably than in conventional methods. Press-type contacts are usually made by continuously punching and forming a strip-shaped metal plate material using a press, and FIGS. 1 and 2 show a perspective view of the finished product and a developed view of the shape before forming. Contact 10 in Figure 1
are two substantially rectangular plate pieces 11 and 12 facing each other.
are connected together by a connecting piece 13, and press-fit grooves 14 are provided in parallel at one end of each plate piece to form a pressure-welding part for the electric wire, while the plate piece 12 connects the plate piece 11 from near the middle thereof. After being bent in the direction approaching the tip 15, the tip 15 is again bent slightly outward to form a bevel, forming a contact spring for the mating mating terminal. After the contact 10 is punched into the shape shown in FIG. 1b, the connecting piece 13 and the plate pieces 11 and 12 are bent at continuous locations to form the finished product shown in FIG. 1a.
The contact 20 shown in FIG. 2 consists of a substantially rectangular base piece 21 and a pair of contact springs 22, 22' extending parallel to and continuous with the base piece 21 near the middle thereof. In the middle of the base piece 21, as shown in FIG.
24' is punched out, and this part is made into grooves 24 and 2.
By bending and forming the wire in one direction so that the wires 4' are parallel to each other, a wire pressure welding portion similar to that shown in FIG. 1a is formed. After the contact springs 22 and 22' are bent toward each other in the completed state, the tip end 2
5 and 25' are bent slightly outward to form a slope, and the mating terminal to be fitted is introduced between the contact springs 22 and 22' by the slope. Among the contacts described above, in the contact 10 shown in FIG. 1, if the mating pin terminal is inserted at a slight angle, the tip of the pin terminal will hit the slope of the tip 15 of the plate piece 12 forming the contact spring. If this is pressed, the plate piece 12 may be deformed away from the plate piece 11, and the contact 10 will lose its contact function with the mating terminal since it has only one contact spring. On the other hand, the second
In the contact 20 shown in the figure, the contact springs are composed of two opposing contact springs, so the reliability is increased compared to the contact 10. In such a case, the entire contact spring will shift upward or be bent and deformed, and as a result, the contact function will also be impaired. Next, each of the above contacts is punched out from a long strip of material.
A completed product as shown in Figure 1 or Figure 2 a is created with the small part still connected to the band-shaped carrier part that is part of the material, but this contact is assembled into the contact hole of the housing to assemble the connector. In some cases, instead of separating the contacts from the carrier in advance and assembling them individually, it is possible to use a method in which multiple contacts are attached to the carrier and assembled into the housing at the same time, which would greatly speed up the assembly process and reduce costs. preferable. However, in order to carry out this simultaneous integration, the arrangement pitch of the completed contact products connected to the carrier mentioned above,
In other words, the arrangement pitch of the contacts in the punched state must match the arrangement pitch of the contact holes in the connector housing to be assembled. However, recently, due to the miniaturization of devices, the shape of connectors has become smaller and the arrangement pitch of the contacts has also become smaller, but the contacts of the shape shown in Fig. 1 or 2 are all The width A cannot be made very small, and therefore it is difficult to make the arrangement pitch of the finished product after molding the same as the contact arrangement pitch of the above-mentioned miniaturized connector, and it is difficult to Simultaneous installation of contacts is not possible. Furthermore, due to the shape of the contact shown in FIG. 1 or 2, more material is cut off when the contact is punched out than the raw material, which increases the consumption of material and causes a rise in price.

The present invention was devised to solve the above-mentioned drawbacks of conventional contacts, and consists of two contact springs to improve the reliability of the contact. By disposing a restraining part on each side, even when pressed by the pin terminal when mating with the mating pin terminal, the contact spring is restrained by the restraining part and does not shift upward, and moreover, the contact spring can be kept in its deployed state. By configuring the shape of the contact in the form of a long strip, the overall width can be reduced, reducing the amount of material to be cut off, and the arrangement pitch in the carrier when the contact is completed can be made to match the pitch of the contact hole in the housing. An object of the present invention is to provide a press-contact type contact that can be simultaneously assembled into a housing.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a perspective view of the completed state of the pressure contact type contact (hereinafter referred to as the present contact) according to the present invention, and FIG. c, and FIG. 5 is a developed view showing the state punched out from the material. As shown in FIG. 5, this contact 30 has a narrow strip shape in the unfolded state, and a connecting piece 31 is located approximately at the center of the strip.
31', tapered parts 32, 32' and press-fit grooves 33, 3
A cavity 34 formed by 3' is provided transparently. Contact springs 35, 35' are formed at both ends of the strip, and a presser piece 36 is provided that extends continuously from the base end 35b of the contact spring 35 toward the center of the strip. There is a base portion 37, and a lance 38 connected to the base portion 37 on only one side is formed by a notch near the middle of the base portion 37. The base portion 37 has a narrow bridge 51 at one end opposite to the center of the strip to form a band-shaped carrier 5 that is a part of the material.
It is connected to 0. Next, the contact spring 35' has a notch 39 at its base on the center side of the strip, and parallel to the contact spring 35' there is a notch 39 in the base of the contact spring 35'.
A restraining piece 40 shorter than 5' is provided. Furthermore, there are two pairs of press-fitting protrusions 41, 41', 42, 42' on each side end surface of the strip, of which 41, 41' are the press-fitting protrusions 41', 41' of the adjacent contact strip, respectively. After being punched out in a connected state, it is cut and separated as appropriate during the molding process. This contact is formed by bending the lance 38 with an appropriate bending radius at the hatched areas in FIG. Can be bent. However, the contact springs 35 and 35' are first bent outward at an obtuse angle at the hatched portions d and d', then slightly bent in a direction toward each other, and further bent outward again as they approach the tips. Contact 30 formed in this way
are connected to the carrier 50 by bridges 51, as shown in FIG. 3, to form a completed product. As shown in FIGS. 3 and 4, in the completed state, the tapered portions 32, 32' and the press-fit grooves 33, 33' are formed parallel to each other and on the same line by the connecting pieces 31, 31'. Configures the wire pressure welding section. Below the press-fit grooves 33, 33', the contact springs 35, 35' have their bases 35a, 3
5a' are opposed to each other and are brought into close contact with each other, then curved away from each other, then bent in a direction toward each other, and then curved slightly outward again near the tip to form the protrusions 43, 4.
3' and receiving slopes 44, 44' are formed. In this case, the protrusions 43 and 43' must be positioned closely or very close to each other. Next, since the holding piece 36 and the restraining piece 40 are bent at almost right angles as described above, the holding piece 36 is bent at the proximal end 35b' (the 5), and the restraining piece 40 is in close contact with the bent portion 35c of the contact spring 35 (the area indicated by the diagonal line d in FIG. 5). contact spring 3
The contact spring 35 is held between the contact spring 5' and the contact spring 35. Furthermore, Lance 3
8 is bent obliquely so as to slightly protrude from the base portion 37 toward the side opposite to the contact springs 35, 35'.
The procedure for assembling this contact 30 into a connector housing is as follows. First, the contacts 30 are connected to the carrier 50 and arranged as shown in FIG.
The magazine 6 has a contact holding structure inside.
Hold the required number of contacts 30 by overlaying 0,
When the magazine 60 is swung, the bridge 51 that connects the contacts 30 and the carrier 50 is easily cut at the notch 52 because the bridge 51 connects the contacts 30 and the carrier 50, and each contact is removed from the carrier 50 while remaining arranged at the original pitch. separated. Next, as shown in FIG. 6, the magazine 60 is moved above the connector housing 70 to be assembled, and while the contacts held in the magazine are correctly aligned with the positions of the respective contact holes 71 of the housing 70, the magazine is lowered, and each contact is assembled. The contact 30 is inserted into the contact hole 71 and further pressed downward by an internal mechanism (not shown) of the magazine 60. Then, the contact 30 is first pressed by the lance 38 on the inner wall surface of the contact hole 71 and is slightly elastically deformed inward, and the press-fit protrusions 41, 41', 42, 42' protruding from each end surface of the contact 30 are pressed. similarly descends while coming into pressure contact with the inner wall surface of the contact hole. As shown in FIG. 6 as a cross section of the housing including the contact 30, the base portion 37 of the contact 30
The contact stops at the position where the tip of the lance 38 contacts the bottom of the contact hole 71, and at the same time, the lance 38 reaches the locking window 72 provided externally in the lower part of the housing, and the tip of the lance 38 enters the locking window 72. Since the contact 30 is elastically restored and protrudes, the contact 30 is locked in the contact hole 71 in cooperation with the pressure contact with the inner wall surface of the press-fit projections 41 to 42'. Also contact springs 35, 3
Each receiving slope 44, 44' of 5' is located so as to face the terminal hole 73 formed in the bottom surface of the contact hole 71. When this connector is fitted with a mating pin terminal, the pin terminal (not shown) introduced from the terminal hole 73 is connected to the contact springs 35, 3.
The contact spring or contact 30 is fitted between the protrusions 43 and 43' of the contact spring 5', and electrical contact is made between the contact spring or the contact 30 and the pin terminal. In this case, the relative position of the receiving slopes 44, 44' and the terminal hole 73 may be slightly deviated, or the pin terminal may be introduced at a slight inclination, so that the tip of the pin terminal may end up on one of the receiving slopes 44 or 44 of the contact 30. When pressed at an angle close to perpendicular to ', the contact spring integral with the receiving slope tends to be pushed upward. However, the contact spring 35 has a restraining piece 40 closely positioned directly above the bent portion 35c, and the proximal end 35 of the contact spring 35'
b' has a holding piece 36 to stop the upward movement of each contact spring, so each contact spring sufficiently maintains its position even when pressed by the mating pin, moves upward and becomes permanently deformed. However, this does not result in poor contact function with the mating pin terminal. In addition, when connecting electric wires to each contact 30 disposed in the connector, pressing an electric wire having an insulating coating against the tapered portions 32, 32' on the upper part of the contact individually or simultaneously on each contact causes the tapered portion 32 to , 32' and the press-fit grooves 33, 33', the insulation coating is broken at the shoulder part, and the internal conductor at that part is exposed and press-fitted into the press-fit grooves 33, 33', and both end surfaces of the conductor and the press-fit grooves are exposed. This is exactly the same as a conventional pressure contact in that the contacts are in pressure contact and a sufficient electrical connection is obtained.

As explained above, according to the present invention, in a pressure contact type contact, one of a pair of contact springs is provided with a presser piece that abuts the base end of the other contact spring, and the other contact spring is provided with a presser piece that abuts the base end of the other contact spring, and the other contact spring is provided with a presser piece that abuts the base end of the other contact spring. Since the restraining pieces are each provided in close contact with each other to primarily restrain the upward movement of the contact spring, when the mating pin terminal is inserted, the pin terminal hits the receiving slope of the contact spring and the contact spring is pushed upward. Even if something happens, it does not move easily, and therefore, it is possible to always maintain high reliability by preventing the contact spring from being permanently deformed and causing poor contact with the mating terminal. In addition, since the shape of the contact in its unfolded state before molding is configured as a long strip, the amount of material cut off during processing is reduced, and the arrangement pitch of the contact in its molded state can be made to match the pitch of the contact hole. Therefore, it is possible to assemble the contacts into the housing at the same time, which is extremely effective in speeding up the assembly of the connector and reducing costs. Many excellent effects can be obtained. It goes without saying that the shape of the contact can be modified in many ways without departing from the spirit of the present invention.

[Brief explanation of the drawing]

1 and 2 are a perspective view and a developed view of a conventional example of a pressure contact, FIG. 3 is a perspective view of a completed product of a pressure contact according to the present invention, and FIG. 4 is an external view and a developed view of a completed product. 5 is a developed view showing a punched state, and FIG. 6 is a partially sectional perspective view of the connector housing and the assembled contacts. 30...Contact, 35, 35'...Contact spring, 35b, 35b'...Base end, 35c, 35
c'...Bent part, 36...Pressing piece, 40...Suppressing piece.

Claims (1)

[Scope of utility model registration request] In a press-fit type contact that has opposing press-fit grooves with tapered parts at one end and a pair of contact springs at the other end, the contact spring is formed integrally with the base end of one contact spring and the base end of the other contact spring is formed integrally with the base end of the other contact spring. It is characterized by providing a presser piece that is bent so as to come into contact with the other contact spring, and a restraining piece that is formed integrally with the other contact spring, is closely positioned directly above the bent portion of one of the contact springs, and is held between the other contact spring. Press-fit type contact.