JP2012033427A - Connector seal and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector seal with integral molding of a gasket made of a rubber-like elastic material to a metal terminal for connection, capable of exhibiting easy assembly and disassembly and high seal performance by a structure for preventing infiltration of external fluid even when causing peeling at an adhesive interface between the metal terminal for connection and the gasket made of rubber-like elastic material.SOLUTION: The connector seal comprises a metal terminal for connection having an end side connected with the electronic components mounted on an electronic circuit board and the other end side freely detachably connected with an external electronic circuit, and an annular gasket made of a rubber-like elastic material, integrally molded at the metal terminal for connection, and for protecting the electronic components connected to the end side from external fluid. An adhesion enlarged part extended from the gasket is provided on the surface of the metal terminal for connection.

Description

The present invention relates to a connector seal and a manufacturing method thereof.
More specifically, the present invention relates to a connector seal used for a fuel level sensor or the like.

Conventionally, a connector seal used for a fuel level sensor or the like has been proposed in which a circuit board and a connector are integrally covered with a resin. (Patent Document 1)
However, since this type of connector seal is a low-pressure molding by vacuum, the mold structure and manufacturing equipment are complicated, and the working efficiency is poor.
Furthermore, since the circuit board is integrally covered with the resin, the circuit board cannot be replaced after molding.

  Therefore, as shown in FIGS. 6 and 7, one end side 110 is connected to an electronic component mounted on an electronic circuit board (not shown), and the other end side 120 is detachably connected to an external electronic circuit (not shown). A connector seal comprising a connecting metal terminal 100 and an annular rubber-made elastic gasket 200 for protecting an electronic component integrally formed on the connecting metal terminal 100 and connected to one end side 110 from an external fluid. was suggested.

Such a configuration can solve the problem of the prior art in which the circuit board is integrally covered with the resin, but has caused the following new problem.
This type of connector seal has a configuration in which the gasket 200 is sandwiched between planar members (not shown) to prevent the ingress of external fluid. However, when the gasket 200 is sandwiched between planar members, the connecting metal Peeling occurred at the bonding interface between the terminal 100 and the gasket 200, causing the problem of allowing intrusion of external fluid from the peeling portion.
In particular, when the connecting metal terminal 100 is formed of a thin and small conductive metal plate having a thickness of about 0.03 to 1.00 mm and a width of about 2 to 7 mm, the problem of peeling is remarkable.

JP 2004-111435 A

  In view of the above, the present invention is a connector seal in which a rubber elastic material gasket is integrally formed with a connecting metal terminal, and is peeled off at an adhesive interface between the connecting metal terminal and the rubber elastic material gasket. Even if this occurs, an object of the present invention is to provide a connector seal that is easy to assemble and disassemble and that can exhibit good sealing performance by preventing external fluid from entering.

In order to achieve the above object, in the present invention, one end side is connected to an electronic component mounted on an electronic circuit board, and the other end side is detachably connected to an external electronic circuit, and the connection In a connector seal formed of an annular rubber-like elastic gasket for protecting the electronic component integrally formed with the metal terminal and connected to the one end side from an external fluid,
An enlarged bonding portion extending from the gasket is provided on the surface of the connecting metal terminal.

The present invention has the following effects.
According to the connector seal of the first aspect of the present invention, even if peeling occurs at the adhesive interface between the metal terminal for connection and the gasket made of rubber-like elastic material, it is assembled by preventing the intrusion of external fluid. It is easy to disassemble and can exhibit good sealing performance.
According to the connector seal of the invention described in claim 2, good sealing performance is exhibited in a thin and small connecting metal terminal.

Furthermore, according to the connector seal of the invention described in claim 3, since the adhesion between the connecting metal terminal and the adhesion enlarged portion can be further strengthened, a good sealing performance can be exhibited.
Further, according to the connector seal of the invention described in claim 4, since the adhesion area between the connecting metal terminal and the adhesion enlarged portion can be maximized, good sealing performance can be exhibited.

Furthermore, according to the connector seal of the invention described in claim 5, since the deformation when the rubber-like elastic material gasket is sandwiched between the flat members can be suppressed from affecting the adhesion expanding portion, the adhesion expansion The peeling of the part can be effectively prevented.
Furthermore, according to the connector seal of the invention described in claim 6, since the handling of the metal terminal for connection becomes easy, the molding time can be shortened and a molded product with high accuracy can be obtained.

Furthermore, according to the connector seal of the invention described in claim 7, since it is not necessary to remove excess rubber-like elastic material (burrs) adhering to the both side surfaces of the connecting metal terminal generated during molding, In addition to saving labor, it is possible to eliminate the problem of deforming the connecting metal terminal when removing the burr.

The top view of the connector seal of this invention. AA sectional drawing of FIG. The top view which shows the manufacturing process of the connector seal of this invention. The fragmentary top view which shows the manufacturing process of the connector seal of this invention. The top view of the connector seal of this invention created with the manufacturing method shown in FIG. The top view of the connector seal of a prior art figure. BB sectional drawing of FIG.

Hereinafter, modes for carrying out the present invention will be described.
The best mode for carrying out the invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the connector seal of the present invention has one end side 11 connected to an electronic component mounted on an electronic circuit board (not shown) and the other end side 12 detachable from an external electronic circuit (not shown). A metal terminal for connection 1 connected to the metal terminal, and an annular rubber elastic material gasket 2 formed integrally with the metal terminal for connection 1 and connected to the one end side 11 to protect the electronic component from an external fluid. It is configured.

Further, on the surface of the connecting metal terminal 1, an adhesion expanding portion 3 made of a rubber-like elastic material extending integrally from the gasket 2 is provided.
This adhesion expansion part 3 exists in the form which coat | covers except the area | region (location shown with the hatching on the figure) required for the electrical connection of the metal terminal 1 for a connection.
As a result, the adhesion area between the connection metal terminal 1 and the adhesion expansion portion 3 can be maximized, so that a good sealing performance can be exhibited.

In addition, as shown in FIG. 2, the maximum thickness X of the adhesion expanding portion 3 is smaller than the thickness Y of the gasket 2.
More specifically, the maximum thickness X of the adhesion expanding portion 3 is designed to a thickness that does not adversely affect even when the gasket 2 is compressed until it exhibits good sealing performance.
Further, the adhesion expanding portions 3 existing on both the front and back surfaces of the connection metal terminal 1 are connected by a through hole 13 provided in the connection metal terminal 1.
For this reason, since the adhesion | attachment with the metal terminal 1 for a connection and the adhesion expansion part 3 can be strengthened more, favorable sealing performance can be exhibited.

Furthermore, a recess 31 is provided at the boundary between the gasket 2 and the adhesion expanding portion 3.
As a result, it is possible to prevent the deformation when the rubber-like elastic material gasket 2 is sandwiched between the flat members from affecting the adhesion expanding portion 3, so that the adhesion expanding portion 3 is effectively prevented from being peeled off. I can do it.

  As the material of the gasket 2, various rubber-like elastic bodies such as FKM, silicone rubber, EPDM, nitrile rubber, acrylic rubber, and HNBR can be appropriately selected and used.

In addition, various adhesives are appropriately selected and used for the adhesive surfaces of the gasket 2 and the adhesion expanding portion 3 and the connection metal terminal 1, but regions necessary for electrical connection of the connection metal terminal 1 (see FIG. The portion indicated by the hatched area is not coated with an adhesive, or if coated, it is dissolved by a physical method such as shot blasting or polishing, or a solvent and gradually removed.
If the adhesive has electrical conductivity, it is not necessary to remove it.

The connecting metal terminal 1 used in the present invention is composed of a conductive metal plate having a thickness of 0.03 to 1.00 mm and a width of 2 to 7 mm.
Further, on one end side 11 of the connecting metal terminal 1, through holes 111 and 111 are formed for connection to electronic components mounted on an electronic circuit board (not shown).
As the conductive metal material, SUS, SPCC, copper alloy or the like is appropriately selected and used.
In addition, it is preferable that the bonding surface of the connection metal terminal 1 is roughened by shot blasting or polishing for the purpose of improving the adhesion to rubber.

Next, a method for manufacturing the connector seal of the present invention will be described with reference to FIG.
The connecting metal terminal 1 used in the present invention is formed of a thin and small conductive metal plate having a thickness of 0.03 to 1.00 mm and a width of 2 to 7 mm.
For this reason, the handling of the connecting metal terminal 1 is complicated and the working efficiency in the molding stage is lowered.

Therefore, in the present invention, as shown in FIG. 3, after the gasket 2 is integrally formed on the metal fitting 14 in which each of the metal terminals for connection 1 and 1 is integrated, each metal for connection is made from the metal fitting 14. A connector seal is manufactured by cutting and separating the terminals 1 and 1 along the ZZ line.
This facilitates the handling of the connecting metal terminal 1, thereby shortening the molding time and obtaining a molded product with high accuracy.

Furthermore, when cutting and separating the connecting metal terminals 1 and 1 from the metal fitting 14, it is desirable to simultaneously cut both side surfaces 15 and 15 of the connecting metal terminals 1 and 1 as indicated by broken lines in FIG.
This eliminates the need to remove the extra rubber-like elastic material (rubber burrs) 21 adhering to the side surfaces 15 and 15 of the connecting metal terminal 1 that has occurred during molding, thus eliminating the need to remove the rubber burrs 21. Instead, the problem of deforming the connecting metal terminal 1 when the rubber burr 21 is removed can be solved.
FIG. 5 is a plan view of the connector seal of the present invention prepared by the manufacturing method shown in FIG. 4, as in FIG.
That is, the other end side 12 of the metal terminal 1 has a stepped portion formed by cutting the both side surfaces 15 and 15 of the connection metal terminal 1.

  The present invention is not limited to the best mode for carrying out the invention described above, and various other configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Metal terminal 2 Gasket 3 Adhesion expansion part 11 One end side 12 The other end side 11 Liquid crystal side case member 12 Keypad side case member 13 Through-hole 14 Metal fitting 15 Side surface 21 Rubber burr

Claims (7)

One end side (11) is connected to an electronic component mounted on the electronic circuit board, and the other end side (12) is detachably connected to an external electronic circuit, and the connection metal terminal. (1) In a connector seal comprising an annular rubber-like elastic gasket (2) for protecting the electronic component integrally formed in (1) and connected to the one end side (11) from an external fluid,
A connector seal characterized in that an adhesion expansion portion (3) extending from the gasket (2) is provided on the surface of the connecting metal terminal (1).   The connector seal according to claim 1, wherein the connecting metal terminal (1) is formed of a conductive metal plate having a thickness of 0.03 to 1.00 mm and a width of 2 to 7 mm.   The bonding enlarged portions (3) existing on both front and back surfaces of the connection metal terminal (1) are connected by a through hole (13) provided in the connection metal terminal (1). The connector seal according to claim 1 or 2.   The connector according to any one of claims 1 to 3, wherein the adhesion expanding portion (3) covers a region other than a region necessary for electrical connection of the connection metal terminal (1). sticker.   The connector seal according to any one of claims 1 to 4, wherein a recess (31) is provided at a boundary portion between the gasket (2) and the adhesion enlarged portion (3).   After each of the connecting metal terminals (1) and (1) is integrally formed with the gasket (2) in the integrated metal fitting (14), the connecting metal terminal (1) is connected from the metal fitting (14). The method for producing a connector seal according to any one of claims 1 to 4, wherein (1) and (1) are cut and separated.   When cutting and separating the connection metal terminals (1) and (1) from the metal fitting (14), both side surfaces (15) and (15) of the connection metal terminals (1) and (1) are also cut simultaneously. The method of manufacturing a connector seal according to claim 6.

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