TW201711310A - Electrical connector simplifying the structure, reducing the number of parts, being easy to assemble, and improving the workability and the connection reliability - Google Patents

Abstract

A subject of this invention is to provide a technique for simplifying the structure, reducing the number of parts, being easy to assemble, and improving the workability and the connection reliability to an electrical connector used in an electric cable having an external conductor. A means of solving the subject is an electrical connector, which is characterized by comprising a cylindrical metal housing (10), a latching fastener (20) accommodated in the inner side of the housing (10) and used for riveting and fixing an outer conductor (53) of a cable (50), and an ring-shaped elastic holder (30) mounted in a groove at the inner side of the housing (10) and used for restricting the movement of the latching fastener (20), wherein the latching fastener (20) is provided with a first tongue-like contact piece (22) in contact with the housing (10) and a second tongue-like contact piece (23) located on the opposite side of the first contact piece and being in contact with the elastic holder, and the latching fastener (20) is fixed within the housing (10) by means of an elastic thrust of the elastic holder (30).

Description

Electrical connector

This invention relates to electrical connectors, and more particularly to cable fixing configurations for electrical connectors.

A cable (shield wire, etc.) used as a wire for high-voltage and high-current, in order to block electrical noise such as electromagnetic waves and static electricity, and to cover the core wire insulated with an endothelium by an outer conductor (wire) On the outer side, the outer side is further insulated and covered by a sheath (sheath). In order to connect the outer conductor of such a cable to the metal casing of the machine, a special electrical connector has been used in the past. In addition, as a technique of such an electrical connector, for example, the technique described in the patent document 1 (Japanese Laid-Open Patent Publication No. Hei 11-126656).

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 11-126656

However, in the conventional electrical connectors, due to the large number of components, there are problems such as complicated structure, assembly time, and insufficient shielding. Therefore, an object of the present invention is to provide a technique for simplifying the structure of an electrical connector for a cable having an external conductor, reducing the number of components, and facilitating assembly, thereby improving workability and connection reliability.

The above and other objects and novel features of the present invention will be apparent from the description and appended claims.

In the invention disclosed in the present invention, a representative structure will be briefly described as follows: that is, the electrical connector of the present invention is characterized in that it has a cylindrical metal casing and is housed inside the casing for externally of the cable. a retaining fastener for riveting and fixing the conductor; and a groove mounted on the inner side of the outer casing for limiting the movement of the retaining member, wherein the retaining fastener has a tongue-shaped first contact piece in contact with the outer casing, and is located The tongue-shaped second contact piece on the opposite side of the first contact piece and in contact with the elastic fixture, the holding fastener is fixed in the casing by the elastic thrust of the elastic fixture.

The effects obtained by simply describing the representative structure in the invention disclosed in the present invention are as follows:

(1) The structure is simple, the number of parts is small, and the cost can be reduced.

(2) The structure is simple, the assembly work is easy, and the workability can be improved.

(3) The structure is simple, and the outer conductor of the cable can be shielded reliably, which can improve the connection reliability.

1‧‧‧Electrical connector

10‧‧‧ Shell

11‧‧‧Flange

12‧‧‧ screw holes

13‧‧‧Positioning ditch

14‧‧‧Restricted protrusion

15‧‧‧Trenches (grooves for elastic fixtures)

16‧‧‧ Guide surface (guide surface for insertion of elastic fixtures)

17‧‧‧Waterproof unit installation section

20‧‧‧ Maintain fasteners

21‧‧‧Riveting

22‧‧‧1st contact piece

23‧‧‧2nd contact piece

24‧‧‧Limited

25‧‧‧Flexing Department

30‧‧‧Flexible fixtures

31‧‧‧Apartment

40‧‧‧Waterproof unit

41‧‧‧shims

42‧‧‧Washers

43‧‧‧Lock ring

44‧‧‧Waterproof ring

50‧‧‧ cable

51‧‧‧core

52‧‧‧Endothelial

53‧‧‧External conductor

54‧‧‧ 皮皮

55‧‧‧ Conductive tape

56‧‧‧ terminals

Fig. 1 is a perspective view showing the entire structure (a state after assembly) of an electrical connector according to an embodiment of the present invention.

Fig. 2 is an exploded side view showing the entire structure (state before assembly) of the electrical connector according to the embodiment of the present invention.

Fig. 3 is a perspective view showing the shape of a retaining fastener of the electrical connector according to the embodiment of the present invention, wherein (a) shows a state before the outer conductor of the cable is riveted, and (a) shows a state after the outer conductor of the cable is riveted.

Fig. 4 is a view showing a shape before assembly of the annular elastic fixture of the electrical connector according to the embodiment of the present invention, wherein (a) is a perspective view, (b) is a side view, and (c) is a plan view.

Fig. 5 is a view showing a state in which an annular elastic fixture is mounted in the electrical connector according to the embodiment of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view (a cable not shown).

Fig. 6 is a view showing a state in which an annular elastic fixture is attached to an electrical connector according to an embodiment of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view (a cable not shown).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and the description thereof will not be repeated.

Fig. 1 is a perspective view showing the entire structure (a state after assembly) of an electrical connector according to an embodiment of the present invention. Fig. 2 is an exploded side view showing the entire structure (state before assembly) of the electrical connector according to the embodiment of the present invention.

First, the structure of an electrical connector according to an embodiment of the present invention will be described with reference to Figs. 1 and 2 . The electrical connector 1 of the present embodiment is used to connect a cable such as a high-voltage, high-current power supply line to an electrical connector of a battery (a battery, an inverter, a motor, etc. (not shown)). a casing 10 having a substantially cylindrical metal, a snap fastener 20 housed in the inner cavity of the casing 10, and an annular elastic fixture 30 attached to a groove on the inner side of the casing 10 (the left side in FIGS. 1 and 2), The waterproof unit 40 attached to the outer side of the outer casing 10 (the right side in FIGS. 1 and 2 and the cable extending direction), and the rubber waterproof ring 44 attached to the outer periphery of the casing 10 are configured.

The cable 50 fixed to the electrical connector 1 is, for example, a shielded electric wire, and the core wire 51, the endothelium 52 that insulates the core wire 51, the outer conductor 53 that covers the outer side of the endothelium 52, and the outer conductor 53 are insulated and covered. The outer skin (sheath) 54 or the like is formed. The cable 50 is configured to cover electrical noise such as electromagnetic waves and static electricity, and the outer conductor 53 covers the outer side of the core wire 51 which is insulated and covered with the endothelium 52. The outer side is insulated and covered by the outer skin 54 in one step. The end portion of the cable 50 partially peels the endothelium 52 and the outer skin 54 to expose the core wire 51 and the outer conductor 53.

The exposed linear outer conductor 53 is folded back on the outer skin 54, and a conductive tape 55 such as a copper material for preventing the peeling prevention is wound thereon, and is then caulked and fixed by the holding fastener 20. By using the conductive tape 55, the braid of the outer conductor 53 is bundled, and the grip fastener 20 bites into the conductive tape 55, so that the cable 50 is less likely to be detached from the grip fastener 20. In the present embodiment, the conductive tape 55 is used to bind the outer conductor 53, but the outer conductor 53 may be directly swaged and fixed by the holding fastener 20 without using a conductive tape. The outer conductor 53 is connected to a machine (for example, a battery, a motor, or the like) via a conductive tape 55, a fastener 20, and a casing 10.

A metal terminal 56 is connected to the core wire 51, and the core wire 51 is connected to a power supply terminal or the like (not shown) of the device via the terminal 56. Further, the terminal 56 is illustrated as an example of a round terminal, but is not limited thereto, and any shape of the terminal may be used. Further, the terminal 56 is not limited to a power supply terminal connected to the device, and may be connected to a terminal such as a signal line.

The metal case 10 is made of a metal such as aluminum or zinc, and is integrally molded by die casting or the like. At one of the outer circumferences of the outer casing 10, a flange 11 is formed by integral molding, and a screw hole 12 for mounting the outer casing 10 to the metal casing of the machine is provided in the flange 11. The housing 10 is grounded to the metal casing of the machine by having the screw holes 12 directly connect the flange 11 to the metal casing of the machine. Also, in the circle of the outer casing 10 In the groove on the outer circumference of the tubular portion, a waterproof ring (O-ring) 44 made of waterproof rubber is embedded in a portion in contact with the metal shell.

The waterproof unit 40 is composed of a rubber gasket 41, a resin gasket 42, and a metal lock ring 43. On the outer circumference of the waterproof unit mounting portion 17 of the outer casing 10, a male thread is cut, a female thread is cut at the inner circumference of the lock ring 43, and the lock ring 43 is rotated to lock the gasket 41 and the gasket 42 Into the outer casing 10. Thereby, the waterproofness of the electrical connector is maintained.

Next, an assembly process (harness processing) regarding the electrical connector 1 will be described with reference to FIG. First, the waterproof ring 44 is attached to the outer casing 10. Next, the cable 50 is passed through the lock ring 43, the washer 42, the washer 41, and the outer casing 10. Next, the outer sheath 54 of the cable 50 is removed, and then the outer conductor 53 is folded back, and the conductive tape 55 is wound thereon to bind the outer conductor 53. Next, the endothelium 52 is removed, the core wire 51 is exposed and the terminal 56 is crimped. Next, after the holding fastener 20 is coated on the conductive tape 55, the holding fastener 20 is swaged, whereby the outer conductor 53 is crimped and fixed. At this time, the grip fastener 20 is positioned at a predetermined distance from the terminal 56. Next, the grip fastener 20 to which the outer conductor 53 is crimped and fixed is inserted into the outer casing 10. At this time, the first contact piece 22 of the holding fastener 20 abuts against the inner wall of the outer casing 10. Next, the annular elastic fixture 30 is fitted into the groove in the outer casing 10, and the holding member 20 and the cable 50 are fixed in the outer casing 10. At this time, the second contact piece 23 of the grip fastener 20 abuts against the lower portion (the abutting portion 31) of the elastic fixture 30. Next, in the waterproof unit mounting portion 17, the locking ring 43 is rotated and locked, thereby compressing the gasket 41 and the pad Circle 42.

As described above, the electrical connector of the present embodiment has a simple structure and a small number of components, and is easy to assemble. Therefore, it is possible to achieve low cost and improved workability.

Fig. 3 is a perspective view showing the shape of the retaining fastener of the electrical connector according to the embodiment of the present invention, wherein (a) shows the state before the outer conductor of the cable is riveted, and (a) shows the state after the outer conductor of the cable is riveted. . The retaining fastener 20 is a fastener for riveting and fixing the outer conductor (thread) 53 of the cable 50. As shown in FIG. 3, the grip fastener 20 is a caulking portion 21 at the front end portion, a tongue-shaped first contact piece 22 that is in contact with the inner wall of the outer casing 10, and is located on the opposite side of the first contact piece 22 and is elastically fixed to the elastic member 30. The tongue-shaped second contact piece 23 that is in contact with the tongue restricts the tongue-shaped regulating piece 24 that moves upward (prevents floating), and the bent portion 25 that is bent at the time of caulking.

The structure is formed such that when the caulking is performed, the bent portion 25 between the caulking portion 21 and the restricting piece 24 is bent. Thereby, it is not necessary to deform the grip fastener 20 by the curved surface, and it is deformed in an angular manner to reduce the rebound. Further, the grip fastener 20 is produced by punching a hard plate material such as stainless steel. The retaining fastener 20 is fixed in the outer casing 10 by the elastic thrust of the elastic fixture 30. The grip fastener 20 is electrically connected to the outer casing 10 via the first contact piece 22 or the second contact piece 23 .

Fig. 4 is a view showing a shape before insertion of the annular elastic fixture of the electrical connector according to the embodiment of the present invention, wherein (a) is a perspective view, (b) is a side view, and (c) is a plan view. Figure 5 is an embodiment of the present invention In the form of the electrical connector, a state in which the annular elastic fixture is mounted is shown, (a) is a perspective view, and (b) is a sectional view (a cable not shown). Fig. 6 is a view showing a state in which an annular elastic fixture is attached to an electrical connector according to an embodiment of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view (a cable not shown).

As shown in FIG. 4, the annular elastic fixture 30 has a curved shape before being attached to the outer casing 10. The elastic fixture 30 is a member that restricts the movement of the gripping member 20 in the direction of the cable axis by the elastic thrust when the mounting is performed. The elastic fixing fixture 30 of the curved shape is inserted into the elastic fixture fixing groove 15 in the outer casing 10, so that the abutting portion 31 of the elastic fixture 30 abuts against the second contact piece 23 of the holding fastener 20, The spring force of the contact piece 23 toward the cable extension direction (for example, the right side of Figs. 2, 6(b), and 7(b)) is generated.

The shape of the elastic fixture 30 is not limited thereto, and may be a spring for the spring force to be generated when the mounting is performed, and may be, for example, a spring of a leaf spring, a disc spring, a coil spring or the like. The cross-sectional shape of the elastic fixture 30 is not limited to a circular shape, and may be a rectangular shape, a trapezoidal shape, an elliptical shape or the like. Further, in the present embodiment, the elastic force is formed by bending the shape of the elastic fixture 30 and fitting it into the linear groove of the outer casing 10, but conversely, the outer casing 10 into which the elastic fixture 30 is fitted may be The groove is curved to generate a spring force.

As shown in FIG. 5, on the inner side of the outer casing 10, a positioning groove 13 for positioning the retaining fastener 20 is formed. When the holding fastener 20 is inserted, the first contact piece 22, the second contact piece 23, and the restriction piece 24 are along the positioning groove 13 Moving, the first contact piece 22 comes into contact with the inner wall of the outer casing 10 to stop, whereby the holding fastener 20 is inserted into the regular position.

A restricting projection 14 is provided on the inner side of the outer casing 10, and the restricting piece 24 of the retaining fastener 20 is engaged with the restricting projection 14, thereby restricting the movement of the retaining fastener 20 in a direction perpendicular to the cable extending direction (upward direction of FIG. 5).

As shown in FIG. 5 and FIG. 6, the front side of the elastic fixing device fixing groove 15 on the inner side of the outer casing 10 is provided with a projecting elastic fixing device insertion guide surface 16 having a slanted surface (conical surface). When the elastic fixture 30 is fitted into the groove 15, the elastic fixture 30 is contracted to move along the guide surface 16, and when the mountain portion passing over the guide surface 16 is fitted into the groove 15, it is expanded and fixed. As shown in FIG. 5, the elastic fixture 30 has a curved shape before being embedded in the groove 15. After the elastic fixture 30 is fitted into the groove 15, as shown in FIG. 6, the abutting portion 31 of the elastic fixture 30 abuts against the second contact piece 23 of the holding fastener 20, so that the bending of the elastic fixture 30 is reduced ( It becomes close to a straight line). Therefore, since the elastic fixture 30 is intended to return to the original curved shape, the abutting portion 31 is intended to move toward the right side of FIG. 6(b) so that the spring force is applied to the second contact piece of the holding fastener 20. twenty three. Thereby, the gripping fastener 20 in turn causes the cable 50 to be securely fixed to the outer casing 10.

Further, since the first contact piece 22 of the holding fastener 20 reliably contacts the inner wall of the outer casing 10, the second contact piece 23 reliably contacts the elastic fixture 30, and therefore is fixed via the holding member 20, the outer casing 10, and the elastic member. With 30, the outer conductor 53 of the cable 50 is reliably shielded.

Further, as described above, the electrical connector 1 of the present embodiment has a simple structure and a small number of components. Therefore, assembly work can be easily performed, and workability can be improved at low cost.

The invention that has been developed by the inventors of the present invention has been specifically described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the technical idea. For example, in the above-described embodiment, the elastic fixture 30 is formed into a curved shape to generate a spring force. However, the present invention is not limited thereto, and the second contact piece 23 of the fastener 20 can be extended toward the cable (right side) If you push the pusher, you can also have other forms.

[Industry use possibility]

The present invention can be utilized in various electrical connectors that connect the outer conductor of the cable to the metal casing of the machine.

10‧‧‧ Shell

13‧‧‧Positioning ditch

16‧‧‧ Guide surface (guide surface for insertion of elastic fixtures)

20‧‧‧ Maintain fasteners

22‧‧‧1st contact piece

23‧‧‧2nd contact piece

24‧‧‧Limited

30‧‧‧Flexible fixtures

31‧‧‧Apartment

44‧‧‧Waterproof ring

Claims (6)

An electrical connector characterized by: a cylindrical metal casing; a holding fastener that is received inside the casing for riveting and fixing an outer conductor of the cable; and a ring-shaped An elastic fixture, which is a groove mounted on an inner side of the outer casing for restricting movement of the retaining fastener, the retaining fastener having: a tongue-shaped first contact piece in contact with the outer casing; On the opposite side of the first contact piece, a tongue-shaped second contact piece that is in contact with the elastic fixture, the holding fastener is fixed in the outer casing by the elastic thrust of the elastic fixture. The electrical connector of claim 1, wherein the elastic fixture is configured to apply a spring force to the cable extension direction of the second contact piece. The electrical connector of claim 1 or 2, wherein the elastic fixture has a curved shape before being mounted to the outer casing. The electrical connector of claim 1 or 2, wherein the retaining fastener has a tongue-shaped restricting piece, the outer casing has a restricting protrusion on an inner side thereof, and the restricting piece is engaged with the restricting protrusion to restrict the retaining buckle The piece moves in a direction perpendicular to the direction in which the cable is extended. The electrical connector of claim 1 or 2, wherein the external guiding system of the cable is fixed to the aforementioned retaining buckle via a conductive tape. On the piece. The electrical connector of claim 1 or 2, wherein the retaining fastener is electrically connected to the housing via the first contact piece or the second contact piece.