JPH0749746Y2 - Electric connector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention comprises a plug used as a connection terminal of a microphone for audio, and a plug receiver such as a jack or a plug adapter to which the plug is connected. Regarding electrical connector.

[Conventional technology]

2. Description of the Related Art Conventionally, as an electrical connector composed of a plug and a plug receiver such as a plug adapter or a jack, those described in JP-B-57-51517 and JP-A-62-44965 are known.

The composite single-head plug described in Japanese Utility Model Publication No. 57-51517 is
It consists of a small single-head plug and a large single-head plug that serves as a plug adapter. The small-sized single-head plug that constitutes this composite single-head plug includes a sleeve portion and a tip portion that are electrically insulated from each other, and a screw portion is provided at the base end portion of the sleeve portion. In addition, the large-sized single-headed plug is inserted into the sleeve of the small-sized single-headed plug, and is electrically insulated from the sleeve having a threaded portion with which the threaded portion of the small-sized single-headed plug is screwed. And a core conductor portion fitted in a closed state. Then, the small-sized single-head plug is inserted into the large-sized single-head plug, and the screw portions of the small-sized single-head plug are screwed together, so that the tip portion of the small-sized single-head plug contacts the core conductor of the large-sized single-head plug. That is, the screw portion of the small single-headed plug and the screw portion of the large single-headed plug contact each other, and at the same time, the tip portion of the small single-headed plug and the core conductor of the large single-headed plug contact each other, so that the electrical Connections are made.

The electrical connector described in Japanese Patent Laid-Open No. 62-44965 has a plug configured similarly to the small single-head plug described in Japanese Utility Model Publication No. 57-51517, and a screw portion and a screw of this plug. It is composed of a jack provided with a threaded portion to be fitted therein and provided with a connecting piece electrically connected to the plug therein. When the plug and the threaded portion of the jack are screwed with each other, the plug comes into contact with the connection piece to establish an electrical connection. The connecting piece presses the contacting portion of the plug by the elastic force.

[Problems to be solved and used by the device]

In the electrical connector described in each of the above-mentioned publications, the plug and the plug adapter or the jack are relatively coupled to each other by screwing the threaded portions together, so that a reliable coupling between the two is realized.

However, a reliable contact may not be made between the tip portion of the plug and the core conductor or the connecting piece, which may make it impossible to achieve a reliable electrical connection.

That is, in the composite single-headed plug described in Japanese Utility Model Publication No. 57-51517, the tip portion and the portion of the core conductor in contact with each other are worn due to repeated detachment and attachment between the small and large-sized single-headed plugs. The shape changes in the direction of separation. At this time, the positional relationship between the small-sized and large-sized single-head plugs is determined by the screwing amount regulated by the length of each screw portion. Therefore, if the portions of the tip portion and the core conductor that contact each other are worn, reliable contact between them will not be realized.

Further, in the electrical connector described in Japanese Patent Laid-Open No. 62-44965, the elastic force of the connecting piece changes due to repeated attachment / detachment between the plug and the jack, and the pressing force against the plug decreases. Therefore, reliable contact between the connection piece and the plug cannot be realized.

Therefore, the present invention solves the problems of the above-described conventional ones, the plug surely contacts the connecting portion of the plug receiving body, and the plug and the plug receiving body can be securely attached and detached repeatedly. An object of the present invention is to provide an electrical connector in which contact is not damaged and reliable electrical connection is guaranteed for a long period of time.

[Means for solving problems]

The electrical connector according to the present invention solves the above-mentioned problems and achieves the above-mentioned object. In order to achieve the above-mentioned object, a first screw part having a knob part on the proximal end side and the first screw part are provided. A plug having a plug portion provided on the tip side of the plug coaxially with the screw portion, the plug portion of the plug is coaxially inserted, and the second screw portion is screwed on the base end side of the first screw portion. The plug receiving body is provided with a threaded portion, and a tip of the plug portion is provided with a connecting member to which the tip of the plug portion abuts and is electrically connected to the tip side facing the inserting direction of the plug portion. When the first screw part is screwed into the second screw part, the screwing of the first screw part into the second screw part is regulated by coming into contact with the tip of the plug part. Is fixed to the plug receiving body and is inserted into the plug receiving body. When the tip of the plug portion contacts the connecting member, the distance from the contact end of the connecting member with which the tip of the plug portion abuts to the base end of the second screw portion is the plug. Is smaller than the distance from the tip of the knob to the tip of the knob, a gap is formed between the proximal end of the second screw portion and the tip of the knob, and the contact member of the connecting member is contacted. The distance from the contact end to the insertion-direction-side end facing the base-end-side end of the second screw part is smaller than the distance to the tip-end part of the first screw part, and the plug and the plug receiver are provided. The plug is capable of being screwed into the plug receiving body by a dimensional amount corresponding to the amount of wear of the contact portion between the plug portion and the connecting member caused by repeated attachment and detachment between the bodies.

[Action]

In the electrical connector according to the present invention, the screwing amount of the first screw portion formed on the base end side of the plug with respect to the second screw portion formed on the base end side of the plug receiver is the tip of the plug and the plug receiver. It is restricted only by the contact with the connecting member provided on the.

Then, when the plug portion or the connecting member wears due to repeated attachment and detachment, this wear amount is absorbed, and further screwing of the first screw portion into the second screw portion side is allowed, and Realizes contact with the connecting member.

〔Example〕

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings.

The example shown in FIG. 1 is composed of a small plug 1 and a plug adapter 2 which is a plug receiving body used when connecting the small plug 1 to a large jack.

The small plug 1 includes a plug portion 3. This plug portion 3 is composed of a tip portion 4 and a sleeve portion 5 which form the tip of the plug 1 and which are made of a conductive material. And the sleeve part 5
Is formed in a hollow tubular shape from a material having conductivity. The base end portion of the sleeve portion 5 is enlarged in diameter, and the first screw portion 6 is formed on the outer peripheral portion of the enlarged diameter portion. Further, the tip portion 4 is continuously provided with a core portion 7 formed so as to be fitted into the hollow portion of the sleeve portion 5.

The tip portion 4 and the sleeve portion 5 are such that the core material portion 7 is fitted in the hollow portion of the sleeve portion 5, and a space between the core material portion 7 and the tip portion 4 and the sleeve portion 5 is made of synthetic resin or the like. The insulating member 8 is focused on and electrically insulated from each other.

Further, at the rear end portion of the core material portion 7 and the first screw portion 6, the first
And the second terminal boards 9 and 10 are connected. To these first and second terminal boards 9 and 10, the ends of the one and the other conductors of the signal cable 11 are connected, respectively. The portion extending from the middle of the first screw portion 6 to the end of each conductor of the signal cable 11 is a knob made of an insulating material such as synthetic resin.
Enclosed in 12.

The plug adapter 2 serving as a plug receiving body includes a circular tube portion 13 made of a conductive material and formed in a hollow circular tube so that the plug portion 3 can be inserted. This circular pipe part 13
The diameter of the rear end side of the right end in FIG. 1 is enlarged, and a second screw portion 14 with which the first screw portion 6 provided on the plug 1 is screwed is formed on the inner peripheral side of the enlarged portion. It is set up.

Further, a terminal body 15 made of a conductive material is attached to the tip end side of the circular pipe portion 13 via an insulating member 17 as a bushing made of synthetic resin or the like. This terminal body 15
The base end side is formed in a substantially conical shape with a tapered tip having the same outer diameter as the circular pipe portion 13, and a shaft-shaped connecting member 16 is integrally provided at the center of the end face on the base end side. There is. This connecting member 16
Is projected into the circular pipe portion 13, and its tip end is opposed to the tip portion 4 at the tip of the plug portion 3 inserted into the circular pipe portion 13.

By the way, since the terminal body 15 is attached to the circular pipe portion 13 via the insulating member 17 as a bushing fitted and arranged on the distal end side of the circular pipe portion 13, it is fixedly arranged on the circular pipe portion 13. It becomes. Therefore, the connecting member 16 formed integrally with the terminal body 15
Also, the mounting position is fixed. Further, since the connecting member 16 is formed in a shaft shape and is arranged so that its axial direction is coaxial with the inserting direction of the plug portion 3, the connecting member 16 does not elastically displace in the inserting direction of the plug 1 into the plug adapter 2. It is in a fixed state.

The circular tube portion 13 and the terminal body 15 are formed in a size and shape corresponding to the plug portion of a large-sized plug.

In the electrical connector configured as described above, in order to connect the plug 1 and the plug adapter 2, the plug portion 3 is inserted into the circular pipe portion 13, and the first screw portion 6 and the second screw portion 14 are connected. Screw together. By doing so, the second terminal board 10 becomes
It is in a state of being electrically connected to the circular pipe portion 13 via the first and second screw portions 6 and 14. Further, the tip portion of the tip portion 4 comes into contact with the protruding end portion of the connecting member 16, so that the first terminal plate 9 is electrically connected to the terminal body 15 via the core material portion 7, the tip portion 4, and the connecting member 16. Connected to.

Then, by connecting the large-sized plug portion including the circular pipe portion 13 and the terminal body 15 to a large-sized jack (not shown),
Electrical connection between the large jack and the plug 1 can be achieved.

By the way, when the tip of the tip portion 4 constituting the plug portion 3 comes into contact with the connecting member 16, as shown in FIG. 1, from the abutting end of the connecting member 16 with which the tip portion 4 comes into contact, the circular pipe portion 13 The base end of the circular tube portion 13, that is, the second end formed on the inner periphery of the base end side
The distance D ₁ to the base end of the screw part 14 of the plug part 3 is
The distance is smaller than the distance D ₂ from the tip of the tip portion 4 which is the tip of the to the tip of the pick portion 12. Therefore, with the tip of the tip portion 4 in contact with the abutting end of the connecting member 16, a gap indicated by an arrow ΔD in FIG. 1 is formed between the tip of the knob portion 12 and the base end of the circular pipe portion 13. Formed. That is, the relative screw-in amount of the first screw portion 6 and the second screw portion 14 is determined by the tip portion 4
It is regulated by the relative contact between No. and the connecting member 16.

In addition, the plug portion 3 that faces the proximal end portion of the second screw portion 14 from the abutting end of the connecting member 16 with which the tip of the tip portion 4 abuts
Is smaller than the distance to the tip of the first screw portion 6 on the plug portion 3 side.
Therefore, if the first screw portion 6 is further screwed into the second screw portion 14 from the state where the tip portion 4 and the connecting member 16 are in relative contact with each other, the tip of the tip portion 4 will be Two
The connecting members 16 are pressed against each other by the screwing force between the screw portions 6 and 14. That is, since the relative screwing amount of the first screw portion 6 and the second screw portion 14 is variable, the contact end with which the tip of the tip portion 4 and the tip portion 4 of the connecting member 16 abut. The pressure contact state between the tip of the tip portion 4 and the connection member 16 can be adjusted according to the state of.

In this way, the tip portion of the tip portion 4 and the projecting end of the connecting member 16 are brought into pressure contact with each other, so that the gap between the first screw portion 6 and the second screw portion 14 and the tip portion 4 The electrical connection between the connection member 16 and the connection member 16 is ensured.

Further, even when the tip portion of the tip portion 4 and the projecting end of the connecting member 16 are worn by repeating the attachment / detachment of the plug 1 and the plug adapter 2, depending on the wear amount, the first
The screwing amount of the screw portion 6 into the second screw portion 14 increases. Therefore, the pressure contact state between the tip portion 4 and the connection member 16 does not change due to wear of these members, and a good connection state can be maintained for a long period of time.

As shown in FIG. 2, a reduced diameter portion 18 is formed by drawing at the tip of the circular pipe portion 13, and a groove portion is formed on the outer periphery of the connection member 16.
By providing 19 and engaging these with each other, the terminal body
It is possible to surely support the circular pipe portion 13 of the 15 and reliably prevent the terminal body 15 from dropping off due to repeated use.

Further, FIG. 3 shows another embodiment of the present invention, and the one shown in FIG. 3 also includes a plug 1 and a jack 20 as a plug receiving body.

The jack 20 in this embodiment is provided with a box body 22 having an insertion hole 21 into which the plug portion 3 of the plug 1 formed of a conductive material is inserted. A second screw portion 23 into which the first screw portion 6 provided on the plug 1 is screwed is formed on the inner peripheral surface of the insertion hole 21. Then, the first screw portion 6 is screwed into the second screw portion 23 so that the tip portion of the tip portion 4 abuts on the connection member 24 provided in the box body 22. That is, the connecting member 24 has the insertion hole 21.
Is fixed to the box body 22 at a position facing the. The connecting member 24 is made of a conductive material and is attached to the box 22 in an electrically insulated state via an insulating member 25 made of an insulating material such as synthetic resin.

In the structure shown in FIG. 3 as well, when the tip portion 4 and the connecting member 24 are in contact with each other, the aforementioned portion between the tip side portion of the knob portion 12 and the outer peripheral edge portion of the insertion hole 21 is described above. A gap similar to that of the embodiment described above is formed. That is, also in this example, the pressure contact state between the tip portion 4 and the connection member 24 does not change due to wear of these members, and a good connection state can be maintained for a long period of time.

[Effect of device]

As described above, in the electrical connector according to the present invention, when the first screw part of the plug is screwed into the second screw part of the plug receiver, the tip of the plug is fixed to the connecting member. Since the screwing of the first screw portion into the second screw portion is regulated by the contact, the tip of the plug and the connecting member are connected by the pressure contact force due to the screwing, and reliable electrical connection is achieved. Electrical continuity can be realized.

Further, even when the plug tip and the connecting member that abut against each other are worn by repeated attachment and detachment of the plug to and from the plug receiving body, the first screw portion is screwed into the second screw portion depending on the wear amount. By varying the regulation position of, the contact state between the plug tip and the connecting member is kept constant.

Further, with the tip of the plug part in contact with the abutting end of the connecting member, a gap is formed between the tip of the knob part and the end part on the insertion direction side facing the base end part of the second screw part. Therefore, after the tip of the plug portion comes into contact with the abutting end of the connecting member, the plug can be further rotated in the insertion direction of the plug receiving body, and the first and the second portions between the plug and the plug receiving body can be rotated. The second screw portion can be screwed more firmly,
Also, it is possible to completely eliminate the play of the second screw portion. And even if a pulling force is applied to the signal cable pulled out from the plug, the force is
It is absorbed by the strong screwing force between the first and second screw parts, and does not affect the pressure contact force of the tip of the plug part against the contact end of the connecting member, and ensures reliable contact of the plug part with the connecting member. Can be maintained.

Therefore, reliable electrical connection can be realized by a simple operation, and a good connection state can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a sectional view showing an electrical connector according to the present invention comprising a plug and a plug adapter, and FIG. 2 is a sectional view showing another example of the electrical connector according to the present invention. FIG. 3 is a sectional view showing an electric connector according to the present invention, which is composed of a plug and a jack. 1 ... Adapter 2,20 ...... Plug adapter and jack that will be the plug receiver 4 ...... Tip that is the tip of the plug 6 ...... First screw part 14,23 ...... Second screw part 16,24 ...... Connecting members

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-44965 (JP, A) Actual development: S62-66190 (JP, U) Actual publication: S57-51517 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A plug having a first screw portion provided with a knob portion on the base end side, and a plug portion provided on the tip end side of the first screw portion coaxially with the screw portion, and the plug. Of the plug part is coaxially inserted, a second screw part into which the first screw part is screwed is formed on the base end side, and the plug part of the plug part is formed on the tip side opposite to the inserting direction of the plug part. And a plug receiver provided with a connecting member whose tip is in contact with and electrically connected to the plug receiving member, when the first screw portion is screwed into the second screw portion. The fixed portion is provided on the plug receiving body so as to restrict the screwing of the first screw portion into the second screw portion by contacting with the tip of the plug receiving portion, and is inserted into the plug receiving body. When the tip of the plug contacts the connecting member, the tip of the plug contacts The distance from the abutting end of the connecting member to the base end side end of the second screw portion is smaller than the distance from the tip of the plug portion to the tip of the knob portion. A gap is formed between the proximal end of the connecting member and the distal end of the knob, and the insertion side end facing the proximal end of the second screw part from the contact end of the connecting member. The distance to the plug portion is made smaller than the distance to the tip portion of the first screw portion, and the amount of wear of the contact portion between the plug portion and the connection member caused by repeated attachment and detachment between the plug and the plug receiver. An electrical connector that allows the plug to be screwed into the plug receiving body by the amount of dimension associated with.