CN111048961B

CN111048961B - Connecting plug

Info

Publication number: CN111048961B
Application number: CN201910962029.0A
Authority: CN
Inventors: 坂井祐介
Original assignee: Tokyo Cosmos Electric Co Ltd
Current assignee: Tokyo Cosmos Electric Co Ltd
Priority date: 2018-10-15
Filing date: 2019-10-11
Publication date: 2022-01-14
Anticipated expiration: 2039-10-11
Also published as: JP7163131B2; CN111048961A; JP2020064713A

Abstract

The invention provides a connecting plug. The connecting plug is provided with a sleeve, a shaft, and a biasing member. The sleeve has conductivity, is inserted into the socket, and is capable of being deformed bidirectionally between a contracted state and an expanded state that is expanded more than the contracted state. The shaft is inserted into the sleeve and is bidirectionally displaceable between a first position and a second position. The urging member urges the shaft toward the second position. When the shaft is at the first position, the sleeve is in the contracted state. When the shaft is located at the second position, the sleeve is expanded by the shaft to be in the expanded state.

Description

Connecting plug

Technical Field

The invention relates to a connection plug.

Background

Conventionally, various connectors have been developed which include a receptacle and a plug inserted into the receptacle in order to connect a signal line or a power supply line.

Patent document 1 discloses a banana plug including an expanding sleeve inside a contact pin inserted into a socket, wherein the expanding sleeve is expanded by manually screwing an expanding pin into the expanding sleeve, and the contact pin is pressed against the socket.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5345640

Disclosure of Invention

Problems to be solved by the invention

However, the banana plug disclosed in patent document 1 has a problem that it takes a lot of time to connect to and disconnect from the socket. That is, when the contact pin is connected to the socket, the operation of screwing the expanding pin by a manual operation is required to expand the contact pin, and when the contact pin is disconnected from the socket, the operation of screwing the expanding pin out by a manual operation is required.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a connection plug capable of easily connecting to and disconnecting from a receptacle.

Means for solving the problems

In order to solve the above conventional problems, a connection plug according to the present invention includes: a sleeve, a shaft and a force application member. The sleeve has conductivity, is inserted into the socket, and is capable of being deformed bidirectionally between a contracted state and an expanded state that is expanded more than the contracted state. The shaft is inserted into the sleeve and is bidirectionally displaceable between a first position and a second position. The urging member urges the shaft toward the second position. When the shaft is at the first position, the sleeve is in the contracted state. When the shaft is located at the second position, the sleeve is expanded by the shaft to be in the expanded state.

Effects of the invention

According to the present invention, connection to and disconnection from the receptacle can be easily performed.

Drawings

Fig. 1 is a schematic longitudinal sectional view showing a structure of a connection plug according to a first embodiment of the present invention in a diameter-reduced state of a ferrule.

Fig. 2 is a schematic longitudinal sectional view showing a structure of a connection plug according to a first embodiment of the present invention in a state where a sleeve is expanded in diameter.

Fig. 3A is a front view showing a structure of a connection plug according to a second embodiment of the present invention in a reduced diameter state of a ferrule.

Fig. 3B is a longitudinal sectional view showing a structure of a connection plug according to a second embodiment of the present invention in a diameter-reduced state of the ferrule.

Fig. 4A is a front view showing a structure of a connection plug according to a second embodiment of the present invention in a state where a sleeve is expanded in diameter.

Fig. 4B is a longitudinal sectional view showing a structure of a connection plug according to a second embodiment of the present invention in a state where a sleeve is expanded in diameter.

Description of the reference numerals

1. 5 connecting plug

2. 6 sleeve

3. 7 shaft

4 spiral spring (force application component)

8 torsion spring (force application component)

One end part of 8a

8b another end portion

20. 60 sleeve body

20a sleeve base

21. 61 receiving part

22 board

30 axle main body

31 expanding part

31a diameter-expanding part body

31b stop

31c connecting part

32. 74 operating part

60a hole part

60b edge hole part

60c round hole part

61a mounting hole

61b groove part

70 first prism part

70a anti-drop component

71 first cylindrical portion

72 second cylindrical portion

72a flange part

73 second prism part

74a hole

74b gripping part

100 socket

C cable

B screw

The lengths of the sides of the front surface shape and the cross-sectional shape of the first prism portion 70 La, Lb

The length of the diagonal line of the frontal shape and the cross-sectional shape of the Lx first prism portion 70

Position specified by P1

S slit

Detailed Description

A connection plug according to an embodiment of the present invention will be described below with reference to the drawings. The embodiments described below are merely examples, and various modifications and techniques not explicitly described in the embodiments below are not excluded from application. The configurations of the embodiments may be variously modified and implemented without departing from the scope of the invention. Further, the configurations of the embodiments may be selected as needed, or may be appropriately combined.

In the following, for convenience of explanation, the upper, lower, front, rear, left, and right sides are defined as shown in the respective drawings, but it goes without saying that the use of the connection plug is not limited to the use in such a direction.

In addition, in all the drawings for describing the embodiments, the same elements are denoted by the same reference numerals in principle, and the description thereof may be omitted.

[1. first embodiment ]

[1-1. Structure ]

A connection plug according to a first embodiment of the present invention will be described with reference to fig. 1 and 2. Fig. 1 is a schematic longitudinal sectional view showing a structure of a connection plug according to a first embodiment of the present invention in a diameter-reduced state of a ferrule. Fig. 2 is a schematic longitudinal sectional view showing a structure of a connection plug according to a first embodiment of the present invention in a state where a sleeve is expanded in diameter.

As shown in fig. 1 and 2, the connection plug 1 includes a cylindrical sleeve 2, a shaft 3 inserted into the sleeve 2, and a coil spring 4 (urging member) provided between the sleeve 2 and the shaft 3.

The sleeve 2 is configured to include: a sleeve body 20 having a relatively small inner diameter and outer diameter, and a housing portion 21 having a relatively large inner diameter and outer diameter and connected to a rear portion of the sleeve body 20. The sleeve 2 is made of a material having good conductivity, for example, metal.

The sleeve body 20 is provided with a plurality of slits extending in the circumferential direction from a predetermined position P1 near the base end (i.e., the connection portion with the housing portion 21) to the tip end in the front-rear direction (i.e., the axial direction of the sleeve 2). Hereinafter, a portion of the sleeve main body 20 closer to the housing portion 21 than the position P1, i.e., a portion where no slit is formed, is referred to as a sleeve base portion 20 a. The thickness of the sleeve body 20 is exaggerated and shown thicker in fig. 1 and 2 for the sake of easy understanding, and is actually thinner than that shown in the figure, and the sleeve body 20 is elastically deformed by the presence of the slit in a range from the distal end of the sleeve body 20 to a position P1. Thus, the sleeve body 20 can be deformed from the reduced diameter state (reduced state) shown in fig. 1 to the expanded diameter state shown in fig. 2 in which the distal end is expanded in diameter as compared with the reduced diameter state, and can be deformed from the expanded diameter state to the reduced diameter state. That is, the sleeve body 20 can be deformed bidirectionally between the reduced diameter state and the expanded diameter state.

Further, in the sleeve 2, a plate 22 is provided on a lower surface portion of the housing portion 21. The plate 22 is rectangular and hangs down from the lower surface of the housing portion 21 with its long side directed in the axial direction of the sleeve 2. The plate 22 is made of a conductive material, and the cable C is physically and electrically connected to the plate 22 by a screw B.

The shaft 3 includes a shaft body 30, an enlarged diameter portion 31 fixed to a front end of the shaft body 30, and an operation portion 32 provided at a rear end of the shaft body 30.

The shaft main body 30 is a solid round rod (column), and the operation portion 32 is a solid disk-shaped member having a larger diameter than the shaft main body 30 and a shorter axial length. The shaft main body 30 and the operation portion 32 are formed of an insulating material, and in the present embodiment, are integrally molded of an insulating resin.

The enlarged diameter portion 31 includes an enlarged diameter portion main body 31a, a stopper 31b provided in front of the enlarged diameter portion main body 31a, and a cylindrical connecting portion 31c provided behind the enlarged diameter portion main body 31a, coaxially. In the present embodiment, the enlarged diameter portion body 31a, the stopper 31b, and the connecting portion 31c are integrally molded from a conductive material such as metal. The enlarged diameter portion 31 may be formed of an insulating material.

The enlarged diameter portion main body 31a is formed in a truncated cone shape with an enlarged diameter toward the front. The stopper 31b is formed in a disk shape having a diameter larger than the front surface of the enlarged diameter portion body 31 a. The front end of the shaft main body 30 is inserted into the connecting portion 31c from the rear of the connecting portion 31c, and the connecting portion 31c is fixed to the front end of the shaft main body 30. In the present embodiment, a male screw is formed at the tip of the shaft body 30, a female screw is formed on the inner peripheral surface of the connecting portion 31c, and the tip of the shaft body 30 is screwed into the connecting portion 31 c.

The shaft main body 30 has an outer diameter smaller than an inner diameter of the sleeve main body 20 (see fig. 1) in a reduced diameter state and an inner diameter of the housing portion 21, and is inserted into the sleeve main body 20 and the housing portion 21. The outer diameter of the operation portion 32 is larger than the inner diameter of the sleeve base 20a and smaller than the inner diameter of the housing portion 21.

The connecting portion 31c of the enlarged diameter portion 31 has an outer diameter smaller than the inner diameter of the sleeve body 20 in the reduced diameter state. On the other hand, the outer diameter of the enlarged diameter portion main body 31a is enlarged as going forward as described above. Therefore, in a state where the shaft 3 is drawn in until the rear surface of the stopper 31b abuts against the front end of the sleeve main body 20 as shown in fig. 2, the front end (contact point) of the sleeve main body 20 is enlarged until its outer diameter is larger than the inner diameter of the socket 100 (shown by a single-dot chain line for simplicity).

The coil spring 4 has a spring inner diameter larger than the outer diameter of the shaft main body 30 and smaller than the outer diameter of the operation portion 32. The coil outer diameter of the coil spring 4 is larger than the inner diameter of the sleeve base 20a and smaller than the inner diameter of the housing 21. According to the dimensional relationship, the coil spring 4 is disposed around the shaft main body 30 in the housing portion 21. In a natural state where no external force acts, the coil spring 4 is in an extended state as shown in fig. 2.

According to such a configuration, in a natural state where no pressing force is applied from the operation portion 32, as shown in fig. 2, the shaft 3 is retracted by the biasing force of the coil spring 4 to a position (second position) where the operation portion 32 protrudes rearward from the housing portion 21 of the sleeve 2. As a result, the sleeve 2 becomes in a diameter-expanded state (expanded state). Further, if the operating portion 32 is pushed into the housing portion 21 against the biasing force of the coil spring 4 so as to advance the shaft 3 to the position (first position) shown in fig. 1, most of the body 31a of the enlarged diameter portion 31 is disengaged from the sleeve 2. As a result, the sleeve 2 is in a natural state in which it is not expanded by the expanded diameter portion main body 31a, i.e., in a reduced diameter state.

[1-2. Effect ]

According to the first embodiment of the present invention, the following operational effects can be obtained.

(1) In the diameter-expanded state shown in fig. 2, the operator manually pushes the operation unit 32 against the biasing force of the coil spring 4. As a result, as shown in fig. 1, the sleeve 2 is reduced in diameter so that its outer diameter is smaller than the inner diameter of the insertion port of the socket 100. Thereby, the sleeve 2 can be inserted into the socket 100.

When the operator stops pushing the operation unit 32 in a state where the sleeve 2 is inserted into the insertion port of the socket 100, the shaft 3 is retracted by the biasing force of the coil spring 4, and the sleeve 2 is expanded in diameter. As a result, the sleeve 2 is pressed by the socket 100 and firmly fixed in the socket 100. Since the sleeve 2 has conductivity, the socket 100 is electrically connected to the cable C via the sleeve 2 and the conductive plate 22 attached to the sleeve 2. That is, the connection plug 1 is connected to the socket 100.

When releasing the connection between the connection plug 1 and the receptacle 100, the operator pushes the operation portion 32 to make the sleeve 2 smaller than the inner diameter of the insertion opening of the receptacle 100 as shown in fig. 1, and can pull out the connection plug 1 from the receptacle 100 to release the connection.

As described above, according to the first embodiment of the present invention, the connection between the connection plug 1 and the receptacle 100 and the release of the connection can be easily performed by one-touch (one-touch) operation only by operating the operation unit 32 to displace the shaft 3.

(2) Since the enlarged diameter portion 31 has conductivity in addition to the sleeve 2, the conductivity of the connection plug 1 can be improved.

[2. second embodiment ]

[2-1. Structure ]

A connection plug according to a second embodiment of the present invention will be described with reference to fig. 3A, 3B, and 4A and 4B. Fig. 3A and 3B are schematic views showing a structure of a connection plug according to a second embodiment of the present invention in a reduced diameter state of a ferrule, in which fig. 3A is a front view and fig. 3B is a longitudinal sectional view. Fig. 4A and 4B are schematic views showing a structure of a connection plug according to a second embodiment of the present invention in a state where a sleeve is expanded in diameter, fig. 4A is a front view, and fig. 4B is a longitudinal sectional view.

As shown in fig. 3A to 4B, the connection plug 5 includes a cylindrical sleeve 6, a shaft 7 inserted into the sleeve 6, and a torsion spring 8 (urging member) provided between the sleeve 6 and the shaft 7. A shaft 7 is rotatably inserted into the sleeve 6.

The sleeve 6 includes a sleeve main body 60 having relatively small inner and outer dimensions, and a housing portion 61 connected to a rear portion of the sleeve main body 60 and having relatively large inner and outer dimensions. The sleeve 6 is made of a material having good conductivity, for example, metal.

The sleeve main body 60 is cylindrical and has a hole 60a penetrating from the front end to the rear end. The hole 60a includes a prismatic hole 60b having a substantially square cross section and a circular hole 60c having a circular cross section and provided continuously to the rear of the prismatic hole 60 b.

The sleeve body 60 is provided with a plurality of (four in the present embodiment) slits S extending from a base end portion (i.e., a connecting portion connected to the housing portion 61) to a tip end portion in the front-rear direction (i.e., the axial direction of the sleeve 6) along the circumferential direction. The thickness of the sleeve body 60 is exaggeratedly larger in fig. 3A to 4B for the convenience of understanding, and is actually thinner than that shown in the drawings, and the sleeve body 60 is elastically deformed by the presence of the slit. Thus, the sleeve body 60 can be deformed from the reduced diameter state shown in fig. 3A and 3B to the expanded diameter state shown in fig. 4A and 4B in which the distal end is expanded in diameter as compared with the reduced diameter state, and can be deformed from the expanded diameter state to the reduced diameter state. That is, the sleeve body 60 can be deformed bidirectionally between the reduced diameter state and the expanded diameter state.

The housing 61 has a torsion spring 8 mounted therein. The housing 61 includes a mounting hole 61a and a groove 61b provided in connection with the mounting hole 61 a. The mounting hole 61a is provided in the inner front surface of the housing 61. The groove 61b extends from the mounting hole 61a to the rear end of the inner peripheral surface of the housing 61 in the front-rear direction. According to such a configuration, when the torsion spring 8 is pushed in from behind, the one end portion 8a of the torsion spring 8 can be guided to the mounting hole 61a through the groove portion 61b, and the torsion spring 8 can be easily assembled to the housing portion 61.

The shaft 7 is a solid rod-shaped member. The shaft 7 is integrally molded by arranging a first prism portion 70, a first columnar portion 71, a second columnar portion 72, and a second prism portion 73 in this order from the front.

The shaft 7 includes a flange portion 72a protruding from the outer peripheral front edge of the second cylindrical portion 72. The shaft 7 includes an operation portion 74 that is press-fitted and fixed to the second prism portion 73 by the second prism portion 73. The operation portion 74 includes a triangular prism-shaped grip portion 74b extending in the front-rear direction on a solid disc (cylindrical) member having a short axial length.

The shaft 7 is inserted into the sleeve 6 as described above. Specifically, the first prism portion 70 is positioned in the prism hole portion 60b, the first columnar portion 71 is positioned in the circular hole portion 60c, the second columnar portion 72 is positioned in the housing portion 61, and the second prism portion 73 and the operation portion 74 fixed to the second prism portion 73 are positioned further rearward than the housing portion 61. The first prism portions 70, the first columnar portions 71, the second columnar portions 72, the second prism portions 73, and the operation portions 74 are all formed of an insulating material. In the present embodiment, the first prism portion 70, the first cylindrical portion 71, the second cylindrical portion 72, and the second prism portion 73 are integrally molded, and only the operation portion 74 is molded separately from these members 70 to 73.

As shown in fig. 3A and 4A, each front shape and each cross-sectional shape of the first prism portion 70 and the prism hole portion 60b are substantially square. The lengths of the sides of the front surface shape and the cross-sectional shape of the first prism portion 70 are slightly shorter than the lengths La and Lb of the sides of the front surface shape and the cross-sectional shape of the prism hole portion 60 b. On the other hand, the length Lx of the diagonal line of the front surface shape and the cross-sectional shape of the first prism portion 70 is longer than the lengths La, Lb of the front surface shape and the cross-sectional shape of each side of the prism hole portion 60 b.

Therefore, as shown in fig. 3A, at the rotational phase of the first prism portion 70 such that the sides of the first prism portion 70 face the sides of the prism hole portion 60B, the sleeve 6 is reduced in diameter as shown in fig. 3A and 3B. On the other hand, as shown in fig. 3B, at the rotational phase of the first prism portion 70 such that each corner portion of the first prism portion 70 comes into contact with each side of the prism hole portion 60B, the sleeve 6 is expanded in diameter by being supported by the first prism portion 70 as shown in fig. 4A and 4B.

Further, the front end of the first prism portion 70 protrudes further than the front end of the sleeve 6. A retaining member 70a is fixed to the protruding portion so as not to allow the shaft 7 to come out rearward from the sleeve 6. The retaining member 70a is larger than the opening of the distal end of the sleeve 6 (i.e., the distal end of the ridge hole portion 60 b) in the diameter-expanded state. In fig. 3A and 4A, the retaining member 70a is omitted.

The first cylindrical portion 71 has a diameter larger than each side of the prism hole portion 60b and a diameter slightly smaller than the diameter of the circular hole portion 60 c. Therefore, the first cylindrical portion 71 is prevented from coming out forward by the step portion between the ridge hole portion 60b and the circular hole portion 60c, and is rotatable within the circular hole portion 60 c.

A flange portion 72a is provided on the outer periphery of the second cylindrical portion 72. The outer diameter of the flange portion 72a is larger than the inner diameter of the front circular hole portion 60c, and the outer diameters of the second columnar portion 72 and the flange portion 72a are smaller than the inner diameter of the housing portion 61. Therefore, the second cylindrical portion 72 is prevented from coming out forward and is rotatable within the housing portion 61.

The second prism portion 73 has a square or rectangular cross section and is smaller than the cross section of the second cylindrical portion 72. In operation portion 74, a hole 74a is provided so as to penetrate from the front surface to the rear surface, and the cross-sectional shape of hole 74a is substantially the same as the cross-sectional shape of second prism portion 73. Operation portion 74 is press-fitted into second prism portion 73 through hole portion 74a until operation portion 74 hits a step between second columnar portion 72 and second prism portion 73.

The operation portion 74 further includes a grip portion 74b provided to protrude on the peripheral surface. The grip portion 74b is a triangular prism-shaped member extending in the front-rear direction.

As described above, the one end portion 8a of the torsion spring 8 is fixed to the sleeve 6 (specifically, the inner peripheral surface of the housing portion 61), and the other end portion 8b is fixed to the shaft 7 (specifically, the front surface of the operation portion 74 facing the housing portion 61).

With this configuration, in a natural state where no rotational force is applied to the operation portion 74, the shaft 7 is in the rotational phase (second position) shown in fig. 4A and 4B by the biasing force of the torsion spring 8. As a result, the sleeve 6 is spread by the corners of the first prism portions 70 of the shaft 7, and is expanded in diameter. Further, if the operating portion 74 is rotated by a predetermined amount against the biasing force of the torsion spring 8 so that the shaft 7 is in the rotational phase (first position) shown in fig. 3A and 3B, the sides of the first prism portion 70 face the sides of the prism hole portion 60B. Thereby, the sleeve 6 is in a diameter-reduced state.

Other structures are the same as those of the first embodiment, and therefore, description thereof is omitted.

[2-2. Effect ]

According to the second embodiment of the present invention, the effects as described above can be obtained.

(1) In the state of the diameter expansion shown in fig. 4A and 4B, the operator manually pushes and rotates the grip portion 74B of the operation portion 74 against the biasing force of the coil spring 8. As a result, as shown in fig. 3A and 3B, the sleeve 6 is reduced in diameter so that its outer diameter is smaller than the inner diameter of the insertion port of the receptacle 100. As a result, the sleeve 6 can be inserted into the socket 100.

When the operator stops pushing the grip 74b in a state where the sleeve 6 is inserted into the insertion port of the socket 100, the shaft 7 is rotated to the phase shown in fig. 4A by the biasing force of the torsion spring 8, and the sleeve 6 is expanded in diameter. As a result, the sleeve 6 is pressed by the socket 100 and firmly fixed in the socket 100. Since the sleeve 6 has conductivity, the socket 100 is electrically connected to the cable C via the sleeve 6 and the conductive plate 22 attached to the sleeve 6. That is, the connection plug 5 and the socket 100 are connected together.

When the connection between the connection plug 5 and the receptacle 100 is released, the operator rotates the grip 74B to make the sleeve 6 smaller than the inner diameter of the insertion opening of the receptacle 100 as shown in fig. 3A and 3B. This allows the connection plug 5 to be pulled out from the socket 100, thereby releasing the connection.

As described above, according to the second embodiment of the present invention, similarly to the first embodiment, the connection between the connection plug 5 and the receptacle 100 and the release of the connection can be easily performed in one touch.

[3. modification ]

(1) In the above embodiments, the cable C is attached to the plate 22, but the plate 22 may be omitted and the cable C may be attached to the sleeve

main bodies

20 and 60 or the

housing portions

21 and 61.

(2) The outer peripheral surfaces of the sleeves 2 and 6 may be coated with an insulating paint at a portion that may be touched by a person's hand or at a portion other than a point (contact point) that comes into contact with the socket 100 when the connection plugs 1 and 5 are connected.

Industrial applicability of the invention

The invention can be applied to a connecting plug, and has high industrial applicability.

Claims

1. A connecting plug is characterized by comprising:

a sleeve having conductivity, inserted into the socket, and capable of being deformed bidirectionally between a contracted state and an expanded state expanded from the contracted state;

a shaft inserted into the sleeve and capable of being displaced bidirectionally in an axial direction of the sleeve between a first position and a second position, the first position and the second position being different from each other in the axial direction; and

a biasing member that biases the shaft toward the second position,

the shaft includes a diameter-expanding portion including a diameter-expanding portion main body that expands in diameter as it goes forward, and a stopper that is provided forward of the diameter-expanding portion main body and has a diameter larger than a front surface of the diameter-expanding portion main body,

when the shaft is located at the first position, the sleeve is located at a rear portion side of the enlarged diameter portion, and the sleeve is brought into the contracted state in which an outer wall surface of the sleeve is located more inward than a front portion of the enlarged diameter portion in a radial direction of the enlarged diameter portion, and when the shaft is located at the second position, the sleeve is brought into contact with a front portion side of the enlarged diameter portion in a state of abutting against the stopper, and the outer wall surface of the sleeve is expanded to a radial outer side of the front portion of the enlarged diameter portion, and the sleeve is brought into the expanded state in which the sleeve is electrically contacted with the socket.