JP6901703B2 - Power connection connector - Google Patents

Description

The present invention relates to a connector for connecting a power source through which a relatively large current flows.

In the field of connectors used for electrically connecting power cables, it is necessary to keep the connection electrical resistance small because the connection part of the connector tends to generate heat because a relatively large current flows.
Therefore, in general, a multi-point contact structure is adopted in which the contact on the socket side into which the pin contact on the plug side is inserted has a hollow shape having a plurality of contact springs inside.
This requires a large amount of manpower to manufacture a hollow portion with multi-point contact, which is not only expensive, but the metal material that can be used for the contact spring is a copper alloy such as beryllium copper or phosphor bronze. It has a higher electrical resistance than copper.
Further, in the past, since the cable core wire was crimped or soldered to the contact, the connection work at the site was difficult.

The present applicant has proposed a connector for cable connection that can be connected by simply inserting the core wire of the cable and can be switched to the released state, but the present invention has a connection between a plug and a socket that can handle a large current. Regarding the structure.

Japanese Unexamined Patent Publication No. 2016-2012262

An object of the present invention is to provide a power supply connection connector which is compact, can handle a large current, and has excellent connectivity.

The power supply connection connector according to the present invention is a power supply connection connector in which a plug connector is fitted and connected to a socket connector, and the plug contact of the plug connector is a cable connection portion having a plug portion and a recessed cross section on the rear end side. The socket contact of the socket connector has a concave shape in cross section, and has a socket portion formed of an insertion groove portion on the front end side thereof and a cable connection portion on the rear end side thereof. It is characterized by having a pressing spring member that elastically presses the plug portion inserted into the insertion groove portion toward one groove wall portion of the insertion groove portion.
Here, the cross-sectional concave shape means that the cross section orthogonal to the cable connection direction has a concave shape, and the cable can be inserted and connected along the concave portion.
For example, it has a U-shaped cross section, a U-shaped cross section, and the like.

In the present invention, the socket portion has a concave cross-sectional shape including a bottom wall and side walls on both sides, and the presser spring member may be fitted to the walls on both sides.
In this way, when the plug portion of the plug contact is inserted into the insertion groove portion of the socket portion of the socket contact, the presser spring member elastically presses from one surface of the plug portion, and the plug portion is elastically connected to the socket portion.
In contrast to the conventional connector structure in which the presser spring member is attached to a resin housing or the like, if the presser spring member is directly fitted to the metal socket contact, it can withstand higher temperatures than resin, so it is connected. Excellent safety.

In the present invention, the cable connection portion between the plug contact and the socket contact has a plug contact spring member and a socket contact spring member for connecting the core wire of the cable, respectively, and the plug contact spring member and the socket contact. It may be shared with the spring member.

In the present invention, the plug contact and the socket contact can be substantially made of pure copper, and the conductivity is higher than that of a conventional copper alloy.
The term "pure copper" is used here to mean that copper materials containing impurities to the permissible range are also included.

The power connection connector according to the present invention is elastically connected by a presser spring member simply by inserting the plug portion of the plug contact into the insertion groove portion formed in the socket portion of the socket contact.
In addition, cable connection is possible using a cable connection part that has a concave shape in the cross section of the plug contact and socket contact, and if you have a plug contact spring member and a socket contact spring member, you can make an electrical connection just by inserting the cable. is there.
As a result, it is possible to pass a large current in spite of its small size, and it is excellent in connection workability in the field.

(A) is an external view of the power connection connector according to the present invention, (b) is a state in which the housing is removed, and (c) is a state in which the socket contact and the plug contact are separated. An example of the structure of the socket contact and the plug contact is shown. (A) shows a state in which the presser spring member and the contact spring member are removed, (b) and (c) are cross-sectional views, and (d) is a perspective view of the socket contact. (A) and (b) are enlarged views of the contact portion. (A) shows a cross-sectional view of the inside of a housing, (b) shows a plug housing, and (c) shows a plug contact part. The external view of the plug and the socket is shown, (a) shows the fitted state, (b) shows the socket, and (c) shows the plug. (A) and (b) show an example of a contact test using a test finger.

An example of the structure of the connector according to the present invention will be described below with reference to the drawings.
As shown in FIG. 5, the connector includes a socket connector 10 and a plug connector 20.
In the connector in the mated connection state shown in FIG. 1 (a), the socket contact 12 and the plug contact 22 in which the socket housing 11 made of resin and the plug housing 21 are removed are shown in FIGS. 1 (b) and 1 (c).

As shown in FIGS. 1 and 2, the socket contact 12 is made of pure copper and has a substantially U-shaped cross-sectional concave shape composed of a bottom wall 12d and side walls 12e and 12e bent and erected from both sides thereof.
The socket contact 12 has a socket portion 12a having a slit-shaped insertion groove portion 12c in the fitting direction on both side walls 12e on the front end side, and a cable connecting portion 12b on the rear end side into which the core wire 1a of the cable 1 can be inserted and connected. ing.
The plate-shaped plug portion 22a of the plug contact 22 described later is inserted into the insertion groove portion 12c provided in the socket portion 12a, and at that time, the plug portion 22a is elastically pressed toward the lower groove wall portion 112c. A presser spring member 13 is attached.
The pressing spring member 13 has a pressing spring 13b that is folded back from a base portion having four locking pieces 13a in the front-rear direction and on both sides toward the inside of the concave portion shape of the socket portion 12a.
The tip of the pressing spring 13b is formed in a chevron shape so as to be in sliding contact with the upper surface of the plug portion 22a.
Key-shaped fitting claws 12f are formed on the upper ends of the side walls 12e on both sides of the socket portion 12a at two locations in the front-rear direction on each side wall 12e, and the locking pieces 13a of the presser spring member 13 are formed on the fitting claws 12f. It is fitted and locked.
Since the metal presser spring member is directly fitted to the pure copper socket portion 12a in this way, the deformation due to high temperature is smaller and the heat resistance is smaller than when the presser spring member is attached to the resin housing. Excellent for.

The cable connection portion 12b on the rear end side of the socket contact 12 is provided with a socket contact spring member 14 so that the cable connection portion 12b can be electrically connected by simply inserting the core wire of the cable 1 along the concave shape.
The socket contact spring member 14 has a locking spring 14c and a pressing spring 14b that are folded back toward the inside of the concave shape of the socket contact 12 from a base portion having four locking pieces 14a in the front-rear direction and the left-right direction.
As shown in FIGS. 2 (b) and 2 (c), the locking spring 14c comes into contact with the insertion direction of the core wire 1a at an acute angle, and the tip portion is locked to the side portion of the core wire 1a to act as a retainer. To do.
The presser spring 14b is an elastic piece whose contact portion is folded back in a chevron shape so as to be in sliding contact with the side portion of the core wire 1a.
In the socket contact spring member 14, four locking pieces are fitted and held by fitting claws 12f provided on the side walls 12e on both sides of the cable connecting portion 12b.

As shown in FIGS. 1 to 3, the plug contact 22 has a plate-shaped plug portion 22a provided on the tip side integrally with the cable connecting portion 22b having a substantially U-shaped cross-sectional concave shape.
The plug contact 22 is also made of pure copper.
The cable connection portion 22b of the plug contact 22 has side walls 22e and 22e that are bent and erected from both sides of the bottom wall 22d, and has four key-shaped fitting claws in the front-rear direction and left and right at the upper end portion, and has this shape. Is shared with the cable connection portion 12b of the socket contact 12.
Further, the plug contact spring member 23 also has four locking pieces 23a, a pressing spring 23b and a locking spring 23c folded back downward, and is shared with the socket contact spring member 14.

As shown in FIG. 3, the socket contact spring member 14 and the plug contact spring member 23 have lances 14e and 23e that are locked to the housing side, and confirmation holes 14d and 23d that communicate with the base portion and the presser springs 14b and 23b, respectively. As shown in FIG. 5, it is possible to confirm the insertion of the core wire 1a of the cable 1 from the confirmation window 27 (17) provided in the housing.
The plug and socket housings 21 and 11 have slide covers 26 (16) for opening and closing the confirmation windows 27 (17), and after confirming the connection of the core wires of the cables, the slide covers 26 (16) are used for confirmation windows. 27 (17) is blocked to prevent dust.

As shown in FIGS. 1 (c) and 4 (a), the socket housing 11 and the plug housing 21 have pushers 15 and 25 having a substantially U-shape in a plan view, and the pushers 15 and 25 are tipped from the rear. When pushed to the side, the tip ends of the locking springs 14c and 23c are pushed upward, and the locked state of the core wire 1a is reprinted.
As a result, electrical connection can be made by simply inserting the core wire 1a of the cable 1 from the connection holes 11b and 21a provided on the rear end side of the socket housing 11 and the plug housing 21, and the core wire 1a can be removed by simply pushing in the pushers 15 and 25. Can be done.

As shown in FIGS. 5 and 6, by fitting and connecting the fitting convex portion 11a provided on the socket housing 11 to the fitting concave portion 21b provided on the plug housing 21, the plug portion 22a is connected to the insertion groove portion of the socket portion 12a. It is plugged into 12c.
Here, by forming a protective wall 11c at the tip of the fitting convex portion 11a and a protective piece portion 21c formed from the lower side of the plug portion 22a of the fitting concave portion 21b toward the tip portion, contact with fingers or the like is prevented. This makes it possible to support a contact test using the test finger 2.

In the connector according to the present invention, since the pure copper plug portion 22a and the pure copper socket portion 12a are electrically connected, they are more conductive than the conventional spring material (copper alloy) and more than the spring material. Since it can be manufactured from a thick plate material, it can be used for large current connections.

1 Cable 10 Socket 11 Socket housing 12 Socket contact 12a Socket part 12b Cable connection part 12c Insertion groove part 112c Groove wall part 12d Bottom wall 12e Side wall 12f Fitting claw 13 Pressing spring member 13b Pressing spring 14 Socket contact spring member 14a Locking piece 14b Presser spring 14c Locking spring 20 Plug 21 Plug housing 22 Plug contact 22a Plug part 22b Cable connection part 23 Plug contact spring member 23b Presser spring 23c Locking spring

Claims (4)

A power supply connection connector that fits and connects a plug connector to a socket connector.
The plug contact of the plug connector is integrally formed with a plug portion and a cable connection portion having a concave cross-sectional shape on the rear end side.
The socket contact of the socket connector has a concave shape in cross section, has a socket portion formed of an insertion groove portion on the front end side thereof, and a cable connection portion on the rear end side thereof, and the socket portion is inserted into the insertion groove portion. A power connection connector comprising a presser spring member that elastically presses the plug portion toward one groove wall portion of the insertion groove portion. The socket portion has a concave cross-sectional shape composed of a bottom wall and side walls on both sides.
The power supply connection connector according to claim 1, wherein the presser spring member is fitted to the walls on both sides. The cable connection portion between the plug contact and the socket contact has a plug contact spring member and a socket contact spring member for connecting the core wire of the cable, respectively, and the plug contact spring member and the socket contact spring member are common. The power connection connector according to claim 1 or 2, wherein the connector is provided. The power supply connection connector according to any one of claims 1 to 3, wherein the plug contact and the socket contact are substantially made of pure copper.

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