JPH0725576U - Fork type contacts and connectors - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a fork-type contact and a connector that can hold a cable stably and can be downsized. A slot portion 1d includes a flat plate portion 1e having a slot portion 1d and a pair of opposing spring portions 1a which are electrically connected to the flat plate portion 1e and have a contact portion 1b at a tip thereof.
In the fork-shaped contact that opens at the upper edge of the flat plate portion 1e and extends from the upper edge to the lower edge of the flat plate portion 1e, the pair of spring portions 1a are independently connected to the side edge portions of the flat plate portion 1e. The contact portion 1b is provided via the portion 1f, and is located below the lower end of the slot 1d. The insulator 3 includes a contact 1 and an insulator 3, and the insulator 3 includes an accommodating recess 3a for accommodating an upper portion of the spring portion 1a, a connecting portion 1f, and a flat plate portion 1e, an accommodating portion 3b for accommodating a lower portion of the spring portion 1a and a mating contact, and a slot. It has a cable housing portion 3c for inserting the cable 5 in the portion 1d.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fork type contact and a connector using the fork type contact.

[0002]

[Prior art]

 As shown in FIGS. 7 and 8, the conventional fork-type contact has a substantially plate-shaped flat plate portion 8e in which a bifurcated spring portion 8a is continuously provided at a lower end portion of the plate portion 8e. A contact portion 8b is formed in the contact portion 8b for contacting a contact of a mating connector (not shown). Further, the flat plate portion 8e has a slot portion 8d formed therein. The slot portion 8d is open at the upper edge of the flat plate portion 8e, and extends from the upper edge of the flat plate portion 8e toward the lower edge.

A guide portion 8c is formed above the slot portion 8d. The guide portion 8c guides a cable (not shown) into the slot portion 8d and, at this time, breaks the sheath of the cable. For this reason, the guide portion 8c has a tapered shape, and its edge portion has a blade shape. Therefore, the cable that has passed through the guide portion 8c and is press-fitted into the slot portion 8d has its outer cover torn by the guide portion 8c, the core wire thereof is exposed, and the cable is electrically connected to the slot portion 8d.

On the other hand, as shown in FIGS. 7 and 9, a conventional connector using a fork-type contact has an insulator 9 for accommodating and holding the contact 8. The insulator 9 has a flat plate portion 8e. The slit 9a to be inserted, the spring portion 8a and the contact portion 8b are arranged, and the slit-shaped accommodation hole 9b for accommodating the contact (not shown) of the mating connector and the slot portion 8d of the contact 8 are provided with a cable. A cable accommodating portion 9c for insertion is formed.

[0005]

However, in the case of the conventional fork type contact as described above, the spring portion 8a having the contact portion 8b only connects with the mating contact, and the slot portion 8d has the cable portion. They only connected to each other, and each of them only performed independent functions, and they did not complement each other. For this reason, in the case of a conventional connector using a fork-type contact, when the contact 8 is connected to the mating contact, the holding force of the slot 8d for the cable becomes loose and the connection between the cable and the contact becomes unstable. Or, in the worst case, the cable may come off the slot portion 8d. For this reason, a pressing member for preventing the cable from coming off and means for changing the shape of the contact have been required.

Further, in the conventional fork-type contact, the spring portion 8a which is a fork portion and the slot portion 8d for holding the cable are formed on the same surface, so that in order for each of them to exert a sufficient function, These shapes had to be increased, and the overall shape of the contact was inevitably increased, making it difficult to achieve low profile and miniaturization.

The present invention has been proposed in view of the above-described problems of the prior art, and is structurally simple and does not require a cable pressing member, and can stably hold a cable, Moreover, it is an object of the present invention to provide a fork-type contact in which the overall shape of the contact can be reduced to realize miniaturization of the connector, and also to provide a connector using this fork-type contact.

[0008]

[Means for Solving the Problems]

 According to the present invention, it includes a flat plate portion having a slot portion, and a pair of spring portions that are electrically connected to the flat plate portion and have a contact portion at a tip thereof and face each other, and the slot is an upper edge of the flat plate portion. In the fork-shaped contact that is open at, and extends from the upper edge to the lower edge of the flat plate portion, the pair of spring portions are independently connected to the side edge portion of the flat plate portion via a connecting portion. A fork-type contact is obtained in which the contact portion is provided and is located below the lower end of the slot.

Further, according to the present invention, the fork-shaped contact according to claim 1 and an insulator are provided, wherein the insulator includes an accommodating recess for accommodating the upper part of the spring part, the connecting part, and the flat plate part. A connector is obtained which has a housing portion for receiving the lower part of the spring portion and the counterpart contact, and a cable housing portion for inserting a cable into the slot portion.

[0010]

[Action]

 In the case of the fork type contact of the present invention, since the pair of spring portions are independently provided on the side edge portions of the flat plate portion through the connecting portion, when the cable is press-fitted into the slot portion, the upper portion of the flat plate portion is pressed. Is expanded and deformed, and the spring part is also displaced along with this deformation. Since the contact portion of the spring portion is located below the lower end of the slot portion, when the upper portion of the flat plate portion is expanded, the distance between the contact portions narrows. As a result, the clamping force of the spring portion against the contact on the other side is strengthened.

On the contrary, when the mating contact is inserted into the spring portion, the gap between the contact portions widens, and the spring portion is displaced accordingly. With this displacement, the flat plate portion is deformed and the slot portion is narrowed. As a result, the holding force of the slot portion with respect to the cable is increased.

As described above, in the case of the fork-type contact of the present invention, the slot portion and the spring portion are related to and complement each other.

[0013]

【Example】

 Embodiments of the present invention will be described with reference to the accompanying drawings.

First, a contact according to an embodiment of the present invention will be described.

As shown in FIGS. 1 and 3, the fork-type contact 1 of the present embodiment has a pair of spring portions 1 a that are spaced apart and arranged in parallel. Contact points 1b projecting inward are formed on inner surfaces of the lower end of the spring section 1a, which face each other. The contact portion 1b is a portion that makes conductive contact with a mating contact (not shown), and the dimension between the contact points 1b is set smaller than the outer dimension of the mating contact. Therefore, when the mating contact is inserted between the contact parts 1b, the mating contact is sandwiched by the spring parts 1a, and the contact part 1b is pressed against the mating contact part of the mating contact. Becomes

On the other hand, the slot portion 1d for pressing and holding the cable 5 has a central portion of the flat plate portion 1e (a position corresponding to an intermediate position between the pair of spring portions 1a) arranged in parallel with the spring portion 1a. In addition, it is formed so as to open at the upper edge of the flat plate portion 1e. The width dimension of the slot portion 1 d is set smaller than the diameter of the core wire 5 a inside the cable 5. A tapered guide portion 1c is formed on the upper portion of the slot portion 1d so as to spread upward, and serves as a guide for pushing the cable 5 into the slot portion 1d.

The upper portions of the pair of spring portions 1a are integrated with the upper portions of the side surfaces of the flat plate portion 1e, respectively. The connecting portion 1f, which integrally connects the spring portion 1a and the flat plate portion 1e, is folded back 180 degrees inward, and the folded surface is formed so as to draw an arc. The connecting portion 1f is a portion to be held when the contact 1 is inserted into the insulator 3.

Next, a connector according to an embodiment of the present invention will be described.

As shown in FIG. 3, the connector of this embodiment is composed of the fork-shaped contact 1 shown in FIG. 1 and an insulator 3 for accommodating and holding it.

As shown in FIGS. 2 and 3, the insulator 3 has a box shape as a whole, and inside the upper part thereof, the upper part of the spring 1a of the contact 1, the connecting part 1f, and the flat plate part 1 are provided. The accommodating recess 3a for accommodating and holding e is formed to be open. An accommodating portion 3b for accommodating the spring portion 1a of the contact 1 and accommodating the mating contact is formed on the bottom surface of the accommodating recess 3a so as to communicate with the accommodating recess 3a. The receiving portion 3b serves as a receiving port for allowing the contact portion 1b formed on the spring portion 1a located there to come into contact with the mating contact, and is opened at the bottom surface of the insulator 3 for inserting the mating contact. is doing. On the back side (the side connected to the cable 5) of the housing recess 3a, a cable housing 3c is formed which opens at the upper surface of the insulator 3 and communicates with this housing recess 3a.

Next, the assembling of the contact 1 into the insulator 3 will be described. The upper portion of the spring portion 1a of the contact 1, the connecting portion 1f, and the flat plate portion 1e are inserted into the accommodation recess 3a of the insulator 3. At this time, the spring portion 1a is pressed against the front side wall surface of the accommodating recessed portion 3a to be fitted therein, and the spring portion 1a is positioned inside the accommodating portion 3b. At this time, the slot portion 1d formed in the flat plate portion 1e is located at the center of the cable housing portion 3c.

Next, a procedure of assembling the contact 1 into the insulator 3 and connecting the cable 5 to the completed connector will be described.

First, as shown in FIG. 4A, the tip portion of the cable 5 is positioned above the guide portion 1 c of the contact 1 accommodated and held in the insulator 3. Then, as shown in FIG. 4 (b), the cable 5 is placed on the guide portion 1c, and then the cable 5 is pushed into the slot portion 1d by the jig 7 as shown in FIG. 4 (c). Then, as shown in FIGS. 5 (a), (b), and (c), the outer cover of the cable 5 is torn, the core wire 5a of the cable 5 directly contacts the contact 1, and both are in an electrically conductive state. Becomes By the way, when the cable 5 is pushed into the slot portion 1d, as shown in FIG. 5B, the portion defining the slot portion 1d is pushed and expanded in the arrow A direction. At this time, a force is applied to the spring portion 1a through the flat plate portion 1e and the connecting portion 1f in the direction B, which is the direction in which the contact portion 1b relatively approaches, as shown in FIG. 5 (c). .

Next, the connection with the mating contact 6 will be described. As shown in FIGS. 6A and 6B, the housing 3b of the insulator 3 is inserted and fitted. Then, the mating contact 6 contacts the contact portion 1b and pushes the spring portion 1a in the C direction. At this time, since the upper part of the spring part 1a and the upper part of the flat plate part 1e are connected via the connecting part 1f, the flat plate part 1e is in the direction in which the part defining the slot part 1d approaches via the connecting part 1f. A force acts in the direction D, which acts as a force to further sandwich the core wire 5a of the cable 5. That is, the clamping force of the cable 5 is strengthened by applying this force.

[0025]

[Effect of device]

 As described above, according to the present invention, the flat plate portion in which the slot portion is formed and the pair of blade portions are arranged on the parallel planes separated from each other, and the flat plate portion and the spring portion are connected via the connecting portion. Therefore, when the mating contact is inserted between the pair of spring parts, the spring part is expanded and the force of expanding the spring part is transmitted to the flat plate part, and the slot is inserted. The groove width of the section is reduced, and the holding force of the cable held in the slot section is enhanced. Therefore, the contact does not need to have a shape for increasing the clamping force of the cable, and it is not necessary to perform processing for that purpose, and the cost can be reduced.

Further, according to the present invention, since the state in which the cable is clamped in the slot portion is reliably maintained, a pressing member for preventing the cable from falling off is not required, and the number of parts can be reduced. It is possible to reduce the cost and processing man-hours, and also from this point, cost down can be achieved.

Further, according to the present invention, even if the holding force of the cable is increased, the structure can be extremely simplified, so that the connector can be downsized and the profile can be reduced.

[Brief description of drawings]

1 shows a fork-type contact according to an embodiment of the present invention, (a) is a plan view, (b) is a front view, FIG.
(C) is a side view.

2A and 2B show an insulator used in a connector according to an embodiment of the present invention, wherein FIG. 2A is a plan view, FIG. 2B is a sectional view taken along line AA of FIG. 2A, and FIG. ) Is a cross-sectional view taken along line BB of FIG.

FIG. 3 is an exploded perspective view of a connector including the contacts shown in FIG. 1 and the insulator shown in FIG.

FIG. 4 is an explanatory view showing a cable connection process of the connector shown in FIG.

5 shows the operation of the connector shown in FIG.
(A) is a plan view, (b) is a sectional view taken along line AA of (a),
(C) is a BB line sectional view of (a).

6 shows a state when the connector shown in FIG. 3 and a mating contact are connected, (a) is a cross-sectional view of the same portion as (c) of FIG. 5, and (b) is (b) of FIG. It is sectional drawing in the same site as.

FIG. 7 is an exploded perspective view of a connector using a conventional fork-type contact.

8 shows the fork-type contact shown in FIG. 7, (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 9 shows the insulator shown in FIG.
(A) is a plan view, (b) is a sectional view taken along line AA of (a),
(C) is a BB line sectional view of (a).

[Explanation of symbols]

 1 contact 1a spring part 1b contact part 1c guide part 1d slot part 1e flat plate part 1f connecting part 3 insulator 3a accommodating recess 3b accommodating part 3c cable accommodating part 5 cable 5a core wire

Claims (2)

[Scope of utility model registration request] 1. A flat plate part having a slot part, and a pair of spring parts that are electrically connected to the flat plate part, have a contact part at the tip, and are opposed to each other, and the slot is opened at an upper edge of the flat plate part. In the fork-shaped contact extending from the upper edge to the lower edge of the flat plate portion, the pair of spring portions are independently provided at the side edge portions of the flat plate portion via the connecting portion. A fork-type contact, wherein the contact portion is located below a lower end of the slot. 2. The fork-shaped contact according to claim 1, and an insulator, wherein the insulator includes a housing recess for housing the upper portion of the spring portion, the connecting portion, and the flat plate portion, and a lower portion of the spring portion and a mating member. A connector having an accommodating portion for receiving a side contact and a cable accommodating portion for inserting a cable into the slot portion.