JP2007109453A - Contact and connector using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact 10 having a simple structure without causing a connection defect nor causing cost increase. <P>SOLUTION: This tubular contact 10 includes a contact part 12 contacting a mating article, a fixing part 14 held to an insulating material 2 and a connection part 16 connected to a cable or a board, and used for integral molding. In the contact, a prevention wall 20 bent toward the undersurface thereof between the contact part 12 and the connection part 14 is formed, and a lock part 18 having a size allowing a tip of the prevention wall 20 to be entered therein is formed on the upper surface side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a contact structure for preventing resin leakage to a contact portion of a contact when integral molding is used as a method for holding a contact on an insulator.

A conventional contact structure will be described. A conventional contact has a substantially cylindrical body, and mainly includes a contact portion that comes into contact with an object, a fixed portion held by an insulator, and a connection portion connected to a cable or a substrate. Conventionally, as a method of holding a contact on an insulator, generally press-fitting, hooking (lance structure), integral molding, welding, and the like are conceivable.
According to the summary of Japanese Utility Model Laid-Open No. 6-73874, in the case of a conventional socket contact composed of two contact pieces 42 that are fixed on one side and the open end side faces in parallel, the pin contact 20 of the mating connector is inserted obliquely, In some cases, the back surface of the piece may enter, causing the socket contact to be deformed, resulting in poor contact. In order to solve this problem, two plate-like tongue pieces 41 that are curved inward are provided above the open end of the contact piece 42, so that even if the pin contact 20 is inserted obliquely, The tongue piece 41 is guided toward the inner side of the contact piece 42 so that the socket contact 40 is not deformed or damaged, and there is a gap 43 between the tongue piece 41 and the contact piece 42. A socket contact having a structure in which the displacement of the contact piece 42 can be sufficiently taken and stable performance can be obtained is disclosed. By the way, according to the claim of utility model registration of Japanese Utility Model Publication No. Hei 6-73874, as claimed in claim 1, it has a fixed portion for fixing to the housing and a curved portion to have contact with the pin contact of the mating connector. In a socket contact having two parallel plate-like contact pieces fixed on the side, two plate-like tongues curved inward to guide the pin contact to the contact piece above the open end of the contact piece A socket contact characterized by providing a strip is disclosed.

In the conventional structure in which the shape of the socket contact structure as described in Patent Document 1 has a cylindrical shape, as a method of holding the contact on the insulator, integral molding is not suitable, and When integral molding is performed with the contact having the conventional structure, there is a problem to be solved that the resin enters the contact portion side and leads to poor connection.
Further, in order to prevent the resin from entering the contact portion at the time of molding, the mold structure is complicated and accuracy is required, leading to an increase in cost.

  The present invention has been made in view of such conventional problems, and is intended to provide a contact with a simple structure that does not lead to poor connection and does not lead to an increase in cost. .

  The object is to provide a cylindrical contact 10 used for integral molding, including a contact portion 12 that contacts an object, a fixing portion 14 that is held by the insulator 2, and a connection portion 16 that is connected to a cable or a substrate. In addition, a bent prevention wall 20 is provided on the lower surface side between the contact portion 12 and the connection portion 14, and a locking portion 18 having a size that allows the tip of the prevention wall 20 to enter is provided on the upper surface side. Can be achieved.

When the cylindrical contact 10 is integrally formed with the insulator 2, the prevention wall 20 prevents the resin from going to the contact portion 12 side.
The clearance between the prevention wall 20 of the cylindrical contact 10 and the side walls 24 on both sides is set to 0.03 to 0.05 mm, and the engagement size between the prevention wall 20 and the locking portion 18 is 0.05. -0.1 mm. If the clearance between the prevention wall 20 and the side walls 24 on both sides is 0.03 mm or less, dimensional accuracy at the time of the contact processing is required, which may lead to an increase in cost, and there is a gap between the prevention wall 20 and the side walls 24 on both sides. If it is 0.05 mm or more, the resin cannot be prevented from entering the contact portion 12 side. If the size of engagement between the prevention wall 20 and the locking portion 18 is 0.05 mm or less, the resin pressure during integral molding cannot be withstood, and the engagement between the prevention wall 20 and the locking portion 18 is not possible. If the size of the through hole is 0.1 mm or more, there is a possibility that a through hole may be formed.

The connector 1 using the contact structure of the present invention includes a plurality of cylindrical contacts 10 and an insulator 2 on which the contacts 10 are held and arranged, and the insulator 2 is formed by integral molding. 1, the cylindrical contact 10 includes a contact portion 12 that comes into contact with an object, a fixing portion 14 that is held by the insulator 2, and a connection portion 16 that is connected to a cable or a board, and the cylindrical contact A bent prevention wall 20 is provided on the lower surface side between the contact portion 12 and the connection portion 16, and a locking portion 18 is provided on the upper surface side so that the tip of the prevention wall 20 can enter. When the shaped contact 10 is integrally formed with the insulator 2, the prevention wall 20 prevents the resin from going to the contact portion 12 side.
The clearance between the prevention wall 20 of the cylindrical contact 10 and the side walls 24 on both sides is set to 0.03 to 0.05 mm, and the engagement size between the prevention wall 20 and the locking portion 18 is 0.05. -0.1 mm. If the clearance between the prevention wall 20 and the side walls 24 on both sides is 0.03 mm or less, dimensional accuracy at the time of the contact processing is required, which may lead to an increase in cost, and there is a gap between the prevention wall 20 and the side walls 24 on both sides. If it is 0.05 mm or more, the resin cannot be prevented from entering the contact portion 12 side. If the size of engagement between the prevention wall 20 and the locking portion 18 is 0.05 mm or less, the resin pressure during integral molding cannot be withstood, and the engagement between the prevention wall 20 and the locking portion 18 is not possible. If the size of the through hole is 0.1 mm or more, there is a possibility that it becomes a through hole.

As is clear from the above description, according to the contact of the present invention and the connector using the contact, the following excellent effects can be obtained.
(1) In a cylindrical contact 10 that includes a contact portion 12 that comes into contact with a counterpart, a fixing portion 14 that is held by an insulator 2, and a connection portion 16 that is connected to a cable or a substrate, and is used for integral molding. Since the bent prevention wall 20 is provided on the lower surface side between the contact portion 12 and the connection portion 16, and the locking portion 18 is provided on the upper surface side so that the tip of the prevention wall 20 enters. Since the resin can be prevented from entering the contact portion 12 during integral molding with a simple structure, it does not lead to poor connection and does not lead to an increase in cost.
(2) When the cylindrical contact 10 is integrally formed with the insulator 2, the prevention wall 20 prevents the resin from going to the contact portion 12 side, leading to poor connection. Neither does it lead to cost increase.
(3) The clearance between the prevention wall 20 of the cylindrical contact 10 and the side walls 24 on both sides is set to 0.03 to 0.05 mm, and the size of the engagement between the prevention wall 20 and the locking portion 18 is set. Since it is 0.05 to 0.1 mm, it can withstand a resin pressure at the time of integral molding with a simple structure, and the resin can be prevented from entering the contact portion 12 side at the time of integral molding, leading to poor connection. And there is no cost increase.
(4) In the connector 1 including a plurality of cylindrical contacts 10 and an insulator 2 on which the contacts 10 are held and arranged, and the insulator 2 is formed by integral molding, the cylindrical contacts 10 are It has the contact part 12 which contacts a counterpart, the fixing part 14 held by the insulator 2, and the connection part 16 connected to a cable or a board, and the contact part 12 and the connection part of the cylindrical contact 10 16, a bent prevention wall 20 is provided on the lower surface side, and a locking portion 18 is provided on the upper surface side so that the distal end of the prevention wall 20 can be inserted. Since the resin is prevented from going to the contact portion 12 side by the prevention wall 20 when it is integrally molded, the connection failure is not caused and the cost is not increased.
(5) The clearance between the prevention wall 20 of the cylindrical contact 10 used in the connector 1 and the side walls 24 on both sides is set to 0.03 to 0.05 mm, and the engagement between the prevention wall 20 and the locking portion 18 is established. Since the size to be combined is 0.05 to 0.1 mm, it can withstand a resin pressure at the time of integral molding with a simple structure, and can prevent the resin from entering the contact portion 12 side at the time of integral molding. Therefore, it does not lead to poor connection, does not lead to an increase in cost, and does not hinder the downsizing of the connector because the size of the contact is not increased.

  An embodiment of a contact according to the present invention and an embodiment of a connector using the contact will be described with reference to FIGS. FIG. 1A is a perspective view of a contact of the present invention in which the contact portion is a male type, and FIG. 1B is a perspective view of a contact of the present invention in which the contact portion is a female type. 2A is a cross-sectional view of the contact of the present invention in which the contact portion is a male type, and FIG. 2B is a cross-sectional view of the contact of the present invention in which the contact portion is a female type. 3A is an enlarged cross-sectional view of the M portion of FIG. 2A of the contact of the present invention in which the contact portion is a male type, and FIG. 3B is FIG. 2B of the contact of the present invention in which the contact portion is a female type. FIG. FIG. 4 is a cross-sectional view of a connector using the contact of the present invention having a female contact portion.

The structure of the contact according to the present invention will be described with reference to the drawings.
Next, the contact 10 will be described. The contact 10 includes a male contact 101 and a female contact 102. If these differences are demonstrated, only the shape of the contact part 12 which contacts a partner will be different like FIG. A contact portion 12 having a pin shape as shown in FIG. 1A is a male contact 101, and a socket shape is provided so that the contact portion 12 is opposed by two contact pieces as shown in FIG. 2B. One is the female contact 102. Both of the two types of contacts 10 have a substantially cylindrical shape. The two types of contacts 101 and 102 are fitted to each other, and the other portions are the same, so that the male contact 101 will be described as an example in the following description.

  The two types of contacts 10 are made of metal and are manufactured by a known press working. As the materials of the two types of the contacts 10, dimensional stability, conductivity, and the like are required, and examples thereof include brass, beryllium copper, and phosphor bronze. The main components of the two types of contacts 10 include a contact portion 12 that comes into contact with a counterpart, a fixing portion 14 that is fixed to the insulator 2, a connection portion 16 that is connected to a substrate, a cable, and the like, and a locking portion 18. And a prevention wall 20.

  The contact portion 12 is as described above, and there are a male type and a female type. The contact portion 12 is appropriately designed so that the male contact 101 and the female contact 102 can be fitted and a stable contact can be obtained. The fixing portion 14 is a portion fixed to the insulator 16, and is fixed by integral molding in the present invention. The fixing portion 14 may be provided with an arrowhead as in this embodiment in consideration of the holding force when integrally molded. The connecting portion 16 is appropriately designed in consideration of customer specifications, connected items, connection methods, and the like. In this embodiment, the cable is connected to a cable (not shown). The cable is placed on the connection portion 16 having a substantially U shape, and then connected by crimping with a jig or the like (so-called crimping). is doing.

  In the contact 10 of the present invention, a bent prevention wall 20 is provided on the lower surface side between the contact portion 12 and the connection portion 14. The prevention wall 20 prevents the resin from entering the contact portion 12 side during integral molding. In addition, a locking portion 18 having a size that allows the tip of the prevention wall 20 to enter is provided on the upper surface side so that the prevention wall 20 can withstand the resin pressure at the time of integral molding. The shape and size of the prevention wall 20 and the locking portion 18 are appropriately designed so as to satisfy the above role. The shape of the locking portion 18 is a concave shape in this embodiment. The positions of the prevention wall 20 and the locking portion 18 are appropriately designed in consideration of the above-mentioned role and the pressing position of the mold. The pressing position is a portion where the contact 10 is pressed by a mold, that is, a portion fixed to the insulator 2.

The clearance between the prevention wall 20 of the cylindrical contact 10 and the side walls 24 on both sides is set to 0.03 to 0.05 mm, and the engagement size between the prevention wall 20 and the locking portion 18 is 0.05. -0.1 mm. If the clearance between the prevention wall 20 and the side walls 24 on both sides is 0.03 mm or less, dimensional accuracy at the time of the contact processing is required, which may lead to an increase in cost, and there is a gap between the prevention wall 20 and the side walls 24 on both sides. If it is 0.05 mm or more, the resin cannot be prevented from entering the contact portion 12 side. If the size of engagement between the prevention wall 20 and the locking portion 18 is 0.05 mm or less, the resin pressure during integral molding cannot be withstood, and the engagement between the prevention wall 20 and the locking portion 18 is not possible. If the size of the through hole is 0.1 mm or more, there is a possibility that it becomes a through hole.
In other words, the gap between the prevention wall 20 and the side walls 24 on both sides is an important part that prevents the resin from entering the contact portion 12 side during integral molding, and the engagement between the prevention wall 20 and the locking portion 18. The size that can be combined is an important part that can withstand the resin pressure during integral molding and that prevents the resin from entering the contact portion 12 side during integral molding. The gap between the prevention wall 20 and the side walls 24 on both sides is ideally about 0.03 to 0.05 mm, and the size of the engagement between the prevention wall 20 and the locking portion 18 is ideal. It is about 0.05 to 0.1 mm.

Next, the connector 1 using the contact 10 will be described. The connector 1 includes a contact 10 and an insulator 2 according to the present invention. The contact 10 is as described above, and the description thereof is omitted here.
The insulator 2 will be described. This insulator 2 is an electrically insulating plastic, and is manufactured by a known technique of injection molding. This material is appropriately selected in consideration of dimensional stability, workability, cost, etc. In general, polybutylene is used. Examples thereof include terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof. The insulator 2 is manufactured by integral molding in which the contact 10 is set in a mold and then molded.

  As an application example of the present invention, it is used for a connector used in electrical equipment, electronic equipment, industrial equipment, communication equipment, etc., and especially a contact that prevents resin leakage to the contact portion of the contact when using integral molding. Concerning structure.

(A) It is a perspective view of the contact of this invention whose contact part is a male type. (B) It is a perspective view of the contact of this invention whose contact part is a female type. (A) It is sectional drawing of the contact of this invention whose contact part is a male type. (B) It is sectional drawing of the contact of this invention whose contact part is a female type. (A) It is an M section expanded sectional view of Drawing 2 (A) of a contact of the present invention in which a contact portion is a male type. (B) It is an N section expanded sectional view of Drawing 2 (B) of a contact of the present invention whose contact portion is a female type. It is sectional drawing of the connector using the contact of this invention whose contact part is a female type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connector 2 Insulator 10 Contact 101 Male contact 102 Female contact 12 Contact part 14 Fixing part 16 Connection part 18 Locking part 20 Prevention wall 22 Hole 24 Side wall

Claims (5)

In a cylindrical contact used for integral molding, including a contact portion that comes into contact with a counterpart, a fixed portion held by an insulator, and a connection portion connected to a cable or a board,
A cylindrical contact characterized in that a bent prevention wall is provided on the lower surface side between the contact portion and the connection portion, and a locking portion is provided on the upper surface side so that the tip of the prevention wall can enter. . The cylindrical contact according to claim 1, wherein when the cylindrical contact is integrally formed with the insulator, the prevention wall prevents the resin from going to the contact portion side. The gap between the prevention wall of the cylindrical contact and the side walls on both sides is set to 0.03 to 0.05 mm, and the size of engagement between the prevention wall and the locking portion is set to 0.05 to 0.1 mm. The cylindrical contact according to claim 1. In a connector comprising a plurality of cylindrical contacts and an insulator in which the contacts are held and arranged, and the insulator is formed by integral molding,
The cylindrical contact has a contact portion that contacts an object, a fixed portion held by an insulator, and a connection portion connected to a cable or a board, and the contact portion and the connection portion of the cylindrical contact When a bent prevention wall is provided on the lower surface side and a locking portion large enough to fit the tip of the prevention wall is provided on the upper surface side, and the cylindrical contact is integrally formed with the insulator And the prevention wall prevents the resin from going to the contact portion side. The gap between the prevention wall of the cylindrical contact and the side walls on both sides is set to 0.03 to 0.05 mm, and the size of engagement between the prevention wall and the locking portion is set to 0.05 to 0.1 mm. The connector according to claim 4.

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