CN109586115B

CN109586115B - Connector for power supply connection

Info

Publication number: CN109586115B
Application number: CN201810172445.6A
Authority: CN
Inventors: 荒井厚; 今村朋洋; 高木哲也
Original assignee: SMK Corp
Current assignee: SMK Corp
Priority date: 2017-09-25
Filing date: 2018-03-01
Publication date: 2021-11-05
Anticipated expiration: 2038-03-01
Also published as: CN109586115A; JP2019061795A; JP6901703B2

Abstract

The present invention relates to a connector for connecting a power supply. The invention aims to provide a connector for power supply connection, which is small in size, can correspond to large current and has excellent connectivity. The power supply connection connector of the invention connects a plug connector and a socket connector in a jogged manner, and is characterized in that a plug part of a plug contact of the plug connector is integrally formed with a cable connection part formed by a cross section concave part shape at the rear end side; the receptacle contact of the receptacle connector has a recessed cross-sectional shape, and is provided with a receptacle section including an insertion groove section on a front end side thereof and a cable connection section on a rear end side thereof, and the receptacle section is provided with a pressing spring member for elastically pressing the plug section inserted into the insertion groove section toward one groove wall section of the insertion groove section.

Description

Connector for power supply connection

Technical Field

The present invention relates to a power supply connection connector through which a relatively large current flows.

Background

In the field of connectors for electrically connecting power cables, since a relatively large current flows, a connecting portion of the connector is liable to generate heat, and it is necessary to suppress a connection resistance to be small.

In general, a multi-point contact structure is adopted in which a socket-side contact of a plug contact inserted into a plug side is formed in a hollow shape having a plurality of contact springs inside.

In this way, not only does it take a lot of man-hours and is expensive to produce the hollow portion for multi-point contact, but also the metal material that can be used for the contact spring is a copper alloy such as beryllium bronze or phosphor bronze, and the resistance is larger than copper.

In addition, since the cable core is conventionally press-welded or soldered to the contact, the connection work in the field is troublesome.

The present applicant has proposed a cable connecting connector which can be connected by merely inserting a cable core and can be switched to a disconnected state, and the present invention relates to a plug and socket connection structure which can respond to a large current.

[ patent document ]

[ patent document 1 ] Japanese patent laid-open No. 2016-201262

Disclosure of Invention

The invention aims to provide a connector for power supply connection, which is small in size, can correspond to large current and has excellent connectivity.

In order to solve the problems of the conventional art and achieve the desired object, a power supply connection connector according to the present invention is a power supply connection connector in which a plug connector is fitted to a receptacle connector, the power supply connection connector including:

a plug portion of the plug contact of the plug connector is integrally formed with a cable connection portion having a recessed cross-sectional shape on a rear end side;

the receptacle contact of the receptacle connector has a recessed cross-sectional shape, and is provided with a receptacle section including an insertion groove section on a front end side thereof and a cable connection section on a rear end side thereof, and the receptacle section is provided with a pressing spring member for elastically pressing the plug section inserted into the insertion groove section toward one groove wall section of the insertion groove section.

Here, the cross-sectional recess shape means that a cross section orthogonal to the cable connection direction is a recess shape, and the cable can be inserted along the recess to be connected.

For example, the cross section is コ shape, U-shape, etc.

In the present invention, the socket portion may have a cross-sectional concave shape including a bottom wall and side walls on both sides, and the pressing spring member may be fitted to the side walls on both sides.

When the plug portion of the plug contact is inserted into the insertion groove portion of the socket contact, the pressing spring member is elastically pressed from one surface of the plug portion, and the plug portion and the socket portion are elastically connected.

In a conventional connector structure in which the pressing spring member is attached to a resin housing or the like, the pressing spring member is directly fitted to the metal receptacle contact, and therefore, the connector structure is resistant to high temperatures compared to resin, and therefore, the connector structure is excellent in connection safety.

In the present invention, the cable connection portions of the plug contact and the receptacle contact may be provided with a plug contact spring member and a receptacle contact spring member, respectively, for connecting cable cores, and the plug contact spring member and the receptacle contact spring member may be shared.

In the present invention, the plug contact and the receptacle contact may be made of substantially pure copper, and have higher conductivity than conventional copper alloys.

Here, the expression "substantially pure copper" is used to include copper materials containing impurities within an allowable range.

The effects of the present invention are explained below:

the power supply connection connector according to the present invention is configured such that only the plug portion of the plug contact is inserted into the insertion groove portion formed in the socket portion of the socket contact, and the plug portion and the socket portion are elastically connected by the urging spring member.

Further, the cable connection can be realized by using the cable connection portion formed by the cross-sectional concave shapes of the plug contact and the receptacle contact, and if the plug contact spring member and the receptacle contact spring member are provided, the electrical connection can be realized only by inserting the cable.

This makes it possible to flow a large current even though it is small, and is excellent in field connection workability.

Drawings

Fig. 1(a) is an external view showing a power supply connection connector according to the present invention, (b) is a state in which a housing is removed, and (c) is a state in which a receptacle contact and a plug contact are separated from each other.

Fig. 2 shows an example of the structure of the receptacle contact and the plug contact, in which (a) shows a state where the pressing spring member and the contact spring member are removed, (b) and (c) are sectional views, and (d) shows a perspective view of the receptacle contact.

Fig. 3(a) and (b) are enlarged views of the contact portion.

Fig. 4(a) shows a sectional view of the inside of the housing, (b) shows the plug housing, and (c) shows the plug contact portion.

Fig. 5 is an external view of a plug and a socket, in which (a) shows a fitted state, (b) shows the socket, and (c) shows the plug.

Fig. 6(a) and (b) show an example of a test finger contact test.

The symbols in the drawings have the following meanings:

1-cable

10-socket

11-socket shell

12-socket contact

12 a-socket part

12 b-cable connection

12 c-insertion groove portion

112 c-groove wall part

12 d-bottom wall

12 e-side wall

12 f-engaging claw

13-urging spring member

13 b-push spring

14-socket contact spring member

14 a-locking piece

14 b-bias spring

14 c-locking spring

20-plug

21-plug shell

22-plug contact

22 a-plug part

22 b-cable connection

23-plug contact spring member

23 b-push spring

23 c-locking spring

Detailed Description

Next, a configuration example of the connector according to the present invention will be described with reference to the drawings.

As shown in fig. 1(a), the connector is composed of a receptacle connector 10 and a plug connector 20.

In the connector in the fitting connection state shown in fig. 1(a), fig. 1(b) and (c) show the receptacle contact 12 and the plug contact 22 of the receptacle housing 11 and the plug housing 21, which are made by removing resin.

As shown in fig. 1 and 2, the receptacle contact 12 is made of pure copper, and includes a bottom wall 12d and

side walls

12e and 12e bent and raised from both sides thereof, and has a cross-sectional concave shape of approximately コ.

The front end of the receptacle contact 12 is a receptacle portion 12a having a fitting-direction slit-shaped insertion groove portion 12c in the side wall 12e on both sides, and the rear end is a cable connection portion 12b to which the core wire 1a of the cable 1 can be inserted and connected.

The pressing spring member 13 is attached, and when a plate-like plug portion 22a of a plug contact 22 described later is inserted into an insertion groove portion 12c provided in the socket portion 12a, the pressing spring member 13 elastically presses the plug portion 22a toward a lower groove wall portion 112 c.

The base portion of the pressing spring member 13 is provided with locking pieces 13a at four positions in the front-rear direction and on both sides, and the pressing spring member 13 includes a pressing spring 13b folded back from the base portion toward the inside of the recessed shape of the socket portion 12 a.

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 22 a.

Hook-shaped engaging claws 12f are formed at two positions in the front-rear direction of the side walls 12e at the upper end portions of the side walls 12e on both sides of the receptacle portion 12a, so that the engaging pieces 13a of the pressing spring member 13 are engaged with the engaging claws 12 f.

Since the metal pressing spring member is directly fitted into the pure copper socket portion 12a in this manner, deformation at high temperature is small compared to mounting the pressing spring member in a resin case, and heat resistance is excellent.

The cable connection portion 12b on the rear end side of the receptacle contact 12 mounts the receptacle contact spring member 14 so that the electrical connection can be made only by inserting the core wire of the cable 1 along the concave shape.

The base portion of the receptacle contact spring member 14 is provided with four locking pieces 14a in the front-rear direction and the left-right direction, and the receptacle contact spring member 14 includes a locking spring 14c and a pressing spring 14b which are folded back from the base portion toward the inside of the recess shape of the receptacle contact 12.

As shown in fig. 2(b) and (c), the engaging spring 14c contacts the core wire 1a at an acute angle with respect to the insertion direction thereof, and the tip end thereof engages with the side portion of the core wire 1a to stop the falling-off.

The contact point of the pressing spring 14b is an elastic piece folded back in a chevron shape so as to be in sliding contact with the side portion of the core wire 1 a.

The four locking pieces of the receptacle contact spring member 14 are fitted and held in fitting claws 12f provided on side walls 12e on both sides of the cable connecting portion 12 b.

As shown in fig. 1 to 3, the plug contact 22 includes a cable connection portion 22b having a cross-sectional recess shape of approximately コ shape, and a plate-like plug portion 22a integrally provided on the distal end side.

The plug contacts 22 are also made of pure copper.

The cable connection portion 22b of the plug contact 22 includes

side walls

22e, 22e bent and raised from both sides of the bottom wall 22d, and hook-shaped engagement claws are provided at four positions on the left and right in the front-rear direction of the upper end portion thereof, and the shape is common to the cable connection portion 12b of the receptacle contact 12.

As shown in fig. 3, the socket contact spring member 14 and the plug contact spring member 23 are provided with blanking

members

14e and 23e engaged with the housing side and

confirmation holes

14d and 23d communicating with the base portion and the

pressing springs

14b and 23b, respectively, and insertion of the core wire 1a of the cable 1 can be confirmed through a confirmation window 27(17) provided in the housing as shown in fig. 5.

The

housings

21, 11 of the plug and the receptacle are provided with slide covers 26(16) for opening and closing the confirmation windows 27(17), and after the connection of the core wires of the cable is confirmed, the confirmation windows 27(17) are closed by the slide covers 26(16), thereby achieving dust prevention.

As shown in fig. 1(c) and 4(a), the socket housing 11 and the plug housing 21 are provided with

pushers

15 and 25 having a substantially コ shape in plan view, and when the

pushers

15 and 25 are pushed in from the rear toward the front end side, the front end sides of the locking springs 14c and 23c are pressed upward, and the locked state of the core wire 1a is released.

Thus, the core wire 1a of the cable 1 can be electrically connected only by inserting the core wire 1a through the connection holes 11b and 21a provided at the rear end sides of the socket housing 11 and the plug housing 21, and the core wire 1a can be detached only by pushing the

pressing members

15 and 25.

As shown in fig. 5 and 6, plug portion 22a is inserted into insertion groove 12c of receptacle portion 12a by fitting convex portion 11a provided in receptacle housing 11 to fitting concave portion 21b provided in plug housing 21.

Here, by forming the protection wall 11c at the distal end portion of the fitting convex portion 11a and forming the protection piece portion from the lower side of the plug portion 22a of the fitting concave portion 21b toward the distal end portion, it is possible to prevent contact of a finger or the like and to cope with a contact test of the test finger 2.

In the connector according to the present invention, the plug portion 22a made of pure copper and the socket portion 12a made of pure copper are electrically connected, and therefore, the electrical conductivity is excellent as compared with the conventional spring material (copper alloy), and further, the connector can be made of a plate material thicker than the spring material, and therefore, can cope with connection with a large current.

The present invention has been described with reference to the embodiments, but the embodiments merely show the principle and application of the present invention, and many modifications and changes in arrangement are possible without departing from the scope of the present invention, and these embodiments are within the scope of the present invention.

Claims

1. A power supply connection connector in which a plug connector is fitted to a receptacle connector, characterized in that:

the receptacle contact of the receptacle connector has a cross-sectional concave shape including a bottom wall and side walls on both sides, and is provided with a receptacle part having an insertion groove part with a slit shape in a fitting direction on the side walls on both sides on a front end side thereof, and a cable connection part on a rear end side thereof, and the receptacle part is provided with a pressing spring member for elastically pressing the plug part inserted into the insertion groove part toward one groove wall part of the insertion groove part.

2. The power supply connection connector according to claim 1, wherein:

the pressing spring member is fitted to the side walls on both sides.

3. The power supply connection connector according to claim 1 or 2, wherein:

the cable connection portions of the plug contact and the receptacle contact are respectively provided with a plug contact spring member and a receptacle contact spring member for connecting cable cores, and the plug contact spring member and the receptacle contact spring member are shared.

4. The power supply connection connector according to any one of claims 1 to 3, wherein:

the header contacts and the receptacle contacts are made of substantially pure copper.