JPH086389Y2 - connector - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector attached to a main body of a machine or a control box, and more particularly to a connector such as a plug in which a contact connected to an electric wire can be inserted into and removed from an insertion hole of an insulator.

[0002]

2. Description of the Related Art Conventionally, in order to ground a receptacle-side connector attached to a main body of a machine or a control box or the like, it is necessary to connect a ground circuit to a ground-circuit terminal provided separately from a signal terminal on the receptacle-side connector. One end of the lead wire is connected, and the other end of the lead wire is connected to a main body of a machine or a control box using a connector mounting screw or the like.

[0003]

However, in the above-mentioned conventional technique, a lead wire for connecting a ground circuit is specially prepared for grounding, and the lead wire is connected to the main body of a machine or a control box. It was necessary to attach it together with the connector, and the structure was complicated and workability was poor. Further, since the ground circuit is configured only in the receptacle-side connector, when the work to support the plug-side connector and connect the plug-side connector to the receptacle-side connector, a current flows to the worker, the so-called There is a risk of electric shock and problems have been pointed out in terms of protecting the human body.

Therefore, an object of the present invention is to provide a connector which can easily construct a ground circuit without using a special lead wire for connecting the ground circuit.

[0005]

According to the present invention, a cylindrical shell having conductivity, an insulating front insulator having an insertion hole and arranged in the shell, and facing the insertion hole. And an insulating rear insulator having a substantially tubular insulator leaf having elasticity formed in the shell so as to face the front insulator, and the insertion hole and the insulator leaf. In a connector including a contact locked to an insulator leaf, at least one of the insertion hole and the insulator leaf is provided with a ground lug, and the ground lug has a spring piece and a strip-shaped piece extending from the spring piece. However, the spring piece makes electrical contact with the contact, and the end of the strip-shaped piece is the flap. Connector is obtained, wherein also the outer peripheral surface of the cement insulator and the rear insulator protrudes outwardly is for electrical contact with the shell.

[0006]

1 is an exploded perspective view of a receptacle as an embodiment of the connector of the present invention, FIG. 2 is a perspective view of the receptacle, FIG. 3 is a partial sectional side view of the receptacle, and FIG. 4 is a perspective view of the receptacle. FIG. 5 is a cross-sectional view of a main part, FIG. 5 is a side view of a contact used in the receptacle, FIG.
7B is a perspective view of the ground lug used in the receptacle, and FIG. 7 is a side view of another contact.

Referring to FIGS. 1 to 6, a receptacle 1 is a cylindrical receptacle shell 2 having conductivity.
An insulating front insulator 4 having an insertion hole 3 arranged in the receptacle shell 2; and an elastic substantially cylindrical insulator leaf 5 formed facing the insertion hole 3 and having a front surface. It has an insulating rear insulator 6 arranged inside the receptacle shell 2 so as to face the insulator 4, and a pin contact 7 that is inserted into the insertion hole 3 and the insulator leaf 5 and is locked to the insulator leaf 5.

A press pin contact is used as the pin contact 7. This pin contact 7 is generally known, and as is apparent from FIGS. 1 and 5, a large diameter cylindrical portion 10 and A pin portion 11 formed at the tip of the large-diameter cylindrical portion 10, an electric wire grip portion 12 that is continuously provided at the rear end of the large-diameter cylindrical portion 10, and a flange portion formed on the outer periphery of the large-diameter cylindrical portion 10. 13 and 13. Besides this pin contact 7, it is of course possible to use the solder type pin contact 8 shown in FIG.

The receptacle shell 2 has a cylindrical body 20.
And a collar 21 formed in the middle of the outer periphery of the cylindrical body 20.
Have and. The cylindrical body 20 has a plug 101 on the tip side.
And an attachment hole 23 for attaching the front insulator 4 and the rear insulator 6 to the rear end side.

A locking groove 25 for locking the plug 101 is spirally formed on the outer periphery of the tip side portion 24 of the cylindrical body 20. Further, a plurality of axial splines 27 for fitting the projections 123 (see FIG. 8) of the plug 101 are formed on the inner circumference 26 of the distal end side portion 24 at intervals in the circumferential direction. Furthermore, a groove 29 into which a sealing O-ring 28 is fitted is formed along the inner circumference 26 of the distal end side portion 24 at the inner side of the insertion hole 22.

A fitting groove 31 for fitting the retaining ring 30 and a front insulator 4 and a rear insulator 6 are formed in a mounting hole 23 formed in a rear end portion of the cylindrical body 20. A ridge (not shown) that fits into the grooves 32, 33 is formed.

The front insulator 4 has a large number of insertion holes 3 for inserting the pin contacts 7. A groove 32 is formed on the outer circumference of the front insulator 4.
Are formed. Further, on the inner surface of the insertion hole 3, a fitting portion 40 for fitting a ground lug 50, which is a conductive component described later, is formed.

A ground lug 50 is attached to the front insulator 4 in a state of being fitted to a fitting portion 40 formed on the inner circumference of the insertion hole 3. The fitting portion 40 is provided only in the insertion hole 3 in which the ground lug 50 is provided.

Further, when a strip-shaped piece 52, which will be described later, is bent on the outer peripheral surfaces of the front insulator 4 and the rear insulator 6 to the outer peripheral surface of the rear insulator 6, two points (about 120) spaced from this bent portion are provided. ° intervals),
Ribs 41 and 42 are provided. These ribs 41,
When the front insulator 4 and the rear insulator 6 are fitted into the receptacle shell 2 by 42, the front insulator 4 and the rear insulator 6 are held concentrically and stably with respect to the receptacle shell 2, respectively. A locking step 43 is formed at one end of the front insulator 4.

As shown in FIGS. 6A and 6B, the earth lug 50 has two semi-cylindrical spring pieces 51 and a strip piece 52 extending from the end surface of one spring piece 51. There is.

The spring piece 51 contacts the pin contact 7 inserted through the ground lug 50 and is electrically connected to the pin contact 7. Further, the strip-shaped piece 52 is inserted through a gap formed in the abutting surfaces of the front insulator 4 and the rear insulator 6, and the tip end portion 53 thereof projects from the outer peripheral surfaces of the front insulator 4 and the rear insulator 6,
The tip portion 53 is bent as shown in FIG. 6 and attached to the outer peripheral surface of the rear insulator 6. When the front insulator 4 and the rear insulator 6 are fitted into the receptacle shell 2 in this state, the tip end portion 53 of the strip-shaped piece 52 comes into contact with the receptacle shell 2 and breaks the zinc chromate coating on the zinc plating of the receptacle shell 2 to form the receptacle shell. 2 electrically connected.

When the front insulator 4 and the rear insulator 6 are press-fitted into the mounting hole 23 of the receptacle shell 2, the locking step portion 43 of the front insulator 4 abuts on the step portion 60 formed on the inner wall of the receptacle shell 2, and the rear The rear end of the insulator 6 is pressed by the retaining ring 30. In this way, the front insulator 4 and the rear insulator 6 are press-fitted and held in the mounting holes 23 of the cylindrical main body 20 of the receptacle shell 2.

FIG. 8 is an exploded perspective view of a plug as another embodiment of the connector of the present invention, FIG. 9 is a perspective view of the plug, FIG. 10 is a partial sectional side view of the plug, and FIG. 12 is a side view of a contact used in the plug, and FIG. 13 is a side view of another contact.

Referring to FIGS. 8 to 12, this plug 1
01 is a cylindrical barrel shell 102 having conductivity,
An insulating front insulator 104 having an insertion hole 103 and arranged in the barrel shell 102, and the insertion hole 1
03, which has a substantially cylindrical insulator leaf 105 having elasticity and is opposed to the front insulator 104, the insulating rear insulator 106 disposed in the barrel shell 102 and the insertion hole 103.
And a socket contact 7 that is inserted into the insulator leaf 105 and locked to the insulator leaf 105.

A press socket contact is used as the socket contact 107, and this socket contact 107 is a generally known one.
As is clear from FIG. 12 and FIG.
The electric wire gripping portion 1 connected to the rear end of the socket portion 110
11 and a flange portion 112 formed on the outer periphery of the socket portion 110. This socket contact 10
Other than 7, it is also possible to use the solder type socket contact 108 shown in FIG.

The barrel shell 102 has a cylindrical body 120.
Have. A coupling nut 121 is attached to the cylindrical body 120. A plurality of keys 122 that fit into the splines 27 formed on the receptacle shell 2 are formed on the outer periphery of the tip side portion of the cylindrical body 120. Further, on the inner circumference of the coupling nut 121, a locking projection 123 that fits into a locking groove 25 formed in the receptacle shell 2 is formed. An O-ring 128 is provided between the cylindrical body 120 and the coupling nut 121. Further, the inner wall of the rear end of the cylindrical body 120 has a fitting groove 131 for fitting the retaining ring 130, and projections for fitting in the grooves 132, 133 formed in the front insulator 104 and the rear insulator 106, respectively. And a strip (not shown) are formed.

A large number of insertion holes 103 for inserting the socket contacts 107 are formed in the front insulator 104. Also, the front insulator 1
A groove 132 is formed on the outer periphery of 04. Further, on the inner surface of the insertion hole 103, a fitting portion 140 for fitting a ground lug 150, which is a conductive component described later, is formed.

A ground lug 150 is attached to the front insulator 104 in a state of being fitted to a fitting portion 140 formed on the inner circumference of the insertion hole 103. The fitting portion 140 has the insertion hole 10 in which the ground lug 150 is provided.
It is provided only in 3.

Further, when a strip-shaped piece 152, which will be described later, is bent on the outer peripheral surfaces of the front insulator 104 and the rear insulator 106 to the outer peripheral surface of the rear insulator 106, two points (about 120) spaced from this bent portion are provided. Ribs 141 and 142 are provided at intervals (° intervals), respectively.
When the front insulator 104 and the rear insulator 106 are fitted into the barrel shell 102 by these ribs 141 and 142, the front insulator 10
4 and the rear insulator 106 are held concentrically and stably with respect to the barrel shell 102, respectively.

The ground lug 150 has two semi-cylindrical spring pieces 151 and a strip-shaped piece 152 extending from the end surface of one spring piece 151.

The spring piece 151 contacts the socket contact 107 inserted through the ground lug 150 and is electrically connected to the socket contact 107. Also, the strip 1
52 is inserted through a gap formed in the abutting surfaces of the front insulator 104 and the rear insulator 106, and the tip portion 153 thereof projects from the outer peripheral surfaces of the front insulator 104 and the rear insulator 106, and the tip portion 153 of the rear insulator 106. It is attached to the outer peripheral surface. When the front insulator 104 and the rear insulator 106 are fitted into the barrel shell 102 in this state, the tip end portion 153 of the strip 152 contacts the barrel shell 102 and breaks the chromate coating on the zinc plating of the barrel shell 102, Electrically connected to 102.

The front insulator 104 and the rear insulator 106 are press-fitted into the barrel shell 102, and the rear end of the rear insulator 106 is pressed by the retaining ring 130. In this way, the front insulator 104 and the rear insulator 106 are held in the barrel shell 102.

As is apparent from FIG. 10, the ground lug 1
Since the socket contact 107 in contact with 50 is located in front of the other socket contacts 107, the ground circuit is formed before the contact of the other socket contact 107 when connecting to the receptacle 1.

[0029]

As described above, in the connector according to the present invention, when a plurality of contacts are inserted in the front insulator and the rear insulator, at least one of these contacts is electrically connected to the shell via the ground lug. Since they are connected, it becomes possible to easily configure the earth circuit without using a special lead wire for connecting the earth circuit.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a receptacle as an embodiment of the connector of the present invention.

FIG. 2 is a perspective view of the receptacle shown in FIG.

3 is a partial cross-sectional side view of the receptacle shown in FIG.

4 is a cross-sectional view of a main part of the receptacle shown in FIG.

5 is a side view of a contact used in the receptacle shown in FIG. 1. FIG.

6 (a) and 6 (b) are perspective views of an earth lug used in the receptacle shown in FIG.

FIG. 7 is a side view of another contact.

FIG. 8 is an exploded perspective view of a plug as another embodiment of the connector of the present invention.

FIG. 9 is a perspective view of the plug shown in FIG.

10 is a partial cross-sectional side view of the plug shown in FIG.

11 is a sectional view of a main part of the plug shown in FIG.

FIG. 12 is a side view of a contact used in the plug shown in FIG.

FIG. 13 is a side view of another contact.

[Explanation of symbols]

 1 Receptacle 2 Receptacle Shell 3 Insertion Hole 4 Front Insulator 5 Insulator Leaf 6 Rear Insulator 7 Pin Contact 50 Earth Lug 51 Spring Piece 52 Strip-shaped Piece 101 Plug 102 Barrel Shell 103 Insertion Hole 104 Front Insulator 105 Insulator Leaf 106 Rear Insulator 107 Lug Socket Contact 151 spring piece 152 band piece

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Nobuo Ishijima 2-7-12 Yoyogi, Shibuya-ku, Tokyo Inside Daiichi Denki Kogyo (72) Inventor Kunio Watanabe 2-7-12 Yoyogi, Shibuya-ku, Tokyo Inside Daiichi Denshi Kogyo Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical shell having conductivity, an insulating front insulator having an insertion hole and arranged in the shell, and a substantially elastic cylinder formed so as to face the insertion hole. An insulating rear insulator having a shaped insulator leaf and facing the front insulator and arranged in the shell, and a contact inserted into the insertion hole and the insulator leaf and locked to the insulator leaf. In the connector including, of the insertion hole and the insulator leaf,
At least one is provided with an earth lug, the earth lug has a spring piece and a strip-shaped piece extending from the spring piece, the spring piece is to make electrical contact with the contact, the strip-shaped piece, The connector is characterized in that its tip portion projects outwardly from the outer peripheral surfaces of the front insulator and the rear insulator and makes electrical contact with the shell.