CN110690600B

CN110690600B - Leaf spring and electric connector

Info

Publication number: CN110690600B
Application number: CN201910998785.9A
Authority: CN
Inventors: 王建; 侯天逸; 王保升
Original assignee: Nanjing Institute of Technology
Current assignee: Nanjing Institute of Technology
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-11-17
Anticipated expiration: 2039-10-21
Also published as: CN110690600A

Abstract

The invention relates to an electrical connector comprising a socket, a plug and a leaf spring arranged in the socket. The plug left end central point puts and is equipped with the contact post perpendicularly, and the cylindric connecting plate that link up about the leaf spring is including, and cylindric connecting plate right-hand member face is connected with a plurality of shell fragments along circumference uniformly vertically, and the end of each shell fragment is the contact plate, and each contact plate all is to the inboard bending. The contact surfaces of the contact plates together form an enveloping contact surface which is adapted to the contact beam. The flat spring has the advantages of simple structure, low production cost, large contact area and more stable connection by adopting an enveloping surface contact mode, can prevent the socket and the plug from loosening and ensures the stability and the reliability of the electric connector. In addition, the large contact surface area can also increase the overcurrent area, and the shortening and the damage of the service life of the electric connector caused by the temperature rise when the electric power is overlarge are avoided. The electric connector can effectively ensure the safe operation of an electric system.

Description

Leaf spring and electric connector

Technical Field

The invention belongs to the technical field of electric connectors, and particularly relates to a leaf spring and an electric connector.

Background

The existing electric connector mainly comprises a plug, a socket and a leaf spring, wherein the leaf spring is arranged in the socket and plays an important role in contact conduction. According to the knowledge of the inventor, most of the existing leaf springs are in point contact or line contact with the plug, the contact area is small, and the overcurrent capacity is poor. When the electrical power is large, the temperature is easily increased, and the service life of the electrical connector is affected.

On the other hand, the reliability of the connection of an electrical connector, which is a basic component of an electrical system, is an important indicator. Therefore, how to ensure that the plug and the socket are not easy to loosen and further ensure the safe operation of the electrical system is a problem to be solved.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a leaf spring which is large in contact area and not easy to loose in connection. Meanwhile, the invention also provides an electric connector which applies the leaf spring and is stable and reliable in connection.

The technical scheme adopted by the invention is as follows:

a leaf spring comprises a cylindrical connecting plate which is communicated left and right, wherein a plurality of elastic sheets are uniformly and vertically connected to the right end face of the cylindrical connecting plate along the circumferential direction, a contact plate is arranged at the tail end of each elastic sheet, and each contact plate is bent inwards; the contact surfaces of the contact plates are all located on the same circumferential surface, and the circumferential surface and the cylindrical connecting plate are coaxial.

Further, the number of the elastic sheets is three.

An electric connector comprises a socket, a plug and the leaf spring, wherein a first cavity matched with the leaf spring is arranged in the center of the socket, the right end of the first cavity is open, the leaf spring can be inserted into the first cavity from right to left, and the left end face of a cylindrical connecting plate is fixedly connected with the wall surface in the socket and positioned at the left end of the first cavity; the contact column is vertically arranged at the center of the left end of the plug, the circumferential surface is an envelope surface matched with the contact column, and the contact column can be inserted into the leaf spring from right to left.

Furthermore, a second cavity used for accommodating the head of the contact column is further arranged in the socket and at the left side of the first cavity, the second cavity and the first cavity are coaxial and are communicated with each other, and the length of the contact column is equal to the sum of the length of the second cavity and the length of the leaf spring.

Furthermore, the electric connector also comprises a hoop, wherein the hoop is provided with two opposite fastening plates, the two fastening plates are provided with holes, the two holes are right opposite, and the hole far away from the fastening bolt is a screw hole; the hoop is sleeved on the contact plates, and the two fastening plates penetrate through the gap between any two elastic sheets; a third cavity for accommodating the two fastening plates is arranged in the socket, the third cavity is communicated with the first cavity, and the right end of the third cavity is open; the leaf spring and the hoop are inserted into the socket from right to left together, and the two fastening plates are in a horizontal state; a first through hole communicated with the third cavity is formed in the upper end face of the socket, and a fastening bolt can penetrate through the first through hole and the two screw holes from top to bottom to fasten the hoop; the hoop, the two fastening plates and the fastening bolts are made of insulating materials.

Furthermore, a contact column protection cover is further arranged at the left end of the plug, a convex part matched with the contact column protection cover is arranged at the right end of the outer side of the socket, the first through hole is formed in the upper end face of the convex part, a track groove matched with the fastening bolt is formed in the upper end face of the contact column protection cover, and the left end of the track groove is open; the protrusion is fully inserted into the contact post shield when the contact post is fully inserted into the leaf spring and the second cavity.

Furthermore, the front side and the rear side of the plug are respectively provided with a clamping block at the root of the convex part, the front side and the rear side of the contact column protective cover are respectively and correspondingly provided with a buckling hole, and when the convex part is completely inserted into the contact column protective cover, the two clamping blocks are respectively buckled into the corresponding buckling holes from inside to outside.

Furthermore, the two clamping blocks are both positioned in the middle of the socket in the height direction.

Further, the insulating material is plastic.

The invention has the beneficial effects that:

the leaf spring has the advantages of simple structure and low production cost, and the leaf spring and the contact column adopt an enveloping surface contact mode, so that the contact area is large, and the connection is more stable. And, because the contact surface is formed by bending the contact plate, the contact plate has certain elastic restoring force after being pressed by the contact column. Therefore, the leaf spring structure of the invention can prevent the socket and the plug from loosening, and ensure the stability and the reliability of the electric connector. In addition, the large contact surface area can also increase the overcurrent area, thereby avoiding the shortening and the damage of the service life of the electric connector caused by the temperature rise when the electric power is overlarge, and the electric connector can effectively ensure the safe operation of an electric system.

Drawings

FIG. 1 is a schematic view of a leaf spring configuration;

FIG. 2 is a schematic view of the electrical connector in a disconnected state;

FIG. 3 is a half-sectional view of FIG. 2;

FIG. 4 is a schematic view of the contact post being inserted into a leaf spring;

FIG. 5 is a schematic view of the electrical connector in a locked state;

reference numerals: 1-leaf spring, 101-cylindrical connecting plate, 102-elastic sheet, 103-contact plate, 2-socket, 201-fixture block, 202-first through hole, 203-convex part, 3-plug, 301-contact column, 302-contact column protective cover, 303-track groove, 304-buckle hole, 4-hoop, 401-fastening plate and 5-fastening bolt.

Detailed Description

The leaf spring and the electrical connector of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The leaf spring 1 shown in fig. 1 comprises a cylindrical connecting plate 101 which is through from left to right, a plurality of elastic sheets 102 are uniformly and vertically connected to the right end face of the cylindrical connecting plate 101 along the circumferential direction, a contact plate 103 is arranged at the tail end of each elastic sheet 102, and each contact plate 103 is bent inwards. The contact surfaces of the contact plates 103 are all located on the same circumferential surface, and the circumferential surface is coaxial with the cylindrical connecting plate 101. In this embodiment, the number of the elastic pieces 102 is three.

The electrical connector shown in fig. 2 and 3 includes a socket 2, a plug 3 and the leaf spring 1, wherein a first cavity matched with the leaf spring 1 is arranged at the center position in the socket 2, the right end of the first cavity is open, the leaf spring 1 can be inserted into the first cavity from right to left, the left end surface of the cylindrical connecting plate 101 is fixedly connected with the wall surface in the socket 2 and at the left end of the first cavity, and the fixing mode is welding. The central position of the left end of the plug 3 is vertically provided with a contact column 301, the circumferential surface is an envelope surface matched with the contact column 301, and the contact column 301 can be inserted into the leaf spring 1 from right to left, as shown in fig. 4. In addition, a second cavity for accommodating the head of the contact column 301 is further arranged in the socket 2 and at the left side of the first cavity, the second cavity and the first cavity are coaxial and are communicated with each other, and the cross sections of the transition positions of the second cavity and the first cavity are in a step shape, see fig. 3. The length of the contact post 301 is equal to the sum of the length of the second cavity and the length of the leaf spring 1, so that the contact post 301 can be fully inserted into the leaf spring 1 and the second cavity.

As an improvement of the above scheme, the electrical connector further includes an anchor ear 4, two opposite fastening plates 401 are disposed on the anchor ear 4, and screw holes are formed in the two fastening plates 401, and the two screw holes are right opposite. The anchor ear 4 is sleeved on the three contact plates 103, and the two fastening plates 401 penetrate through the gap between any two elastic sheets 102, as shown in fig. 1. A third cavity (not shown in the drawings) for accommodating the two fastening plates 401 is arranged in the socket 2, the third cavity is communicated with the first cavity, and the right end of the third cavity is open. The leaf spring 1 and the anchor ear 4 are inserted into the socket 2 from right to left, and the two fastening plates 401 are in a horizontal state. The upper end face of the socket 2 is provided with a first through hole 202 (see fig. 3) communicated with the third cavity, and the fastening bolt 5 can penetrate through the first through hole 202 and the screw holes on the two fastening plates 401 from top to bottom to fasten the hoop 4. The hoop 4, the two fastening plates 401 and the fastening bolts 5 are made of insulating materials, and in this embodiment, the insulating materials are plastics.

In addition, the left end of the plug 3 is also provided with a contact column protection cover 302, the right end of the outer side of the socket 2 is a convex part 203 matched with the contact column protection cover 302, the first through hole 202 is formed in the upper end face of the convex part 203, the upper end face of the contact column protection cover 302 is provided with a track groove 303 matched with the fastening bolt 5, and the left end of the track groove 303 is opened. The front and rear sides of the plug 3 are respectively provided with a latch 201 at the root of the convex part 203, and the front and rear sides of the contact post protective cover 302 are respectively provided with a corresponding fastening hole 304. When the contact post 301 is fully inserted into the leaf spring 1 and the second cavity, the protrusion 203 is fully inserted into the contact post protective cover 302, and the two latch blocks 201 are respectively latched into the corresponding latching holes 304 from the inside to the outside, as shown in fig. 5, during which the fastening bolt 5 moves along the rail groove 303. In this embodiment, the two latch blocks 201 are located at the middle position of the socket 2 in the height direction.

In the structure of the leaf spring 1, a plurality of contact plates 103 and the contact columns 301 can form stable enveloping contact, the contact area is large, the connection is more stable, and the socket 2 and the plug 3 can be prevented from loosening. Moreover, the large contact area can increase the overcurrent area, and the shortening and the damage of the service life of the electric connector caused by the temperature rise when the electric power is overlarge are avoided. In addition, the invention also ensures the fastening contact between the contact column 301 and the leaf spring 1 by sleeving the hoops 4 on the contact plates 103 and tightening the fastening bolts 5. The connection reliability between the socket 2 and the plug 3 is further ensured by respectively providing the latch 201 and the latching hole 304 on the socket 2 and the plug 3. When the socket 2 and the plug 3 are separated, the fastening bolt 5 is firstly unscrewed, and then the two clamping blocks 201 are respectively pressed to withdraw from the corresponding buckling holes 304, so that the plug 3 can be pulled out from the socket 2.

The foregoing is considered as illustrative of the preferred embodiments of the invention and technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric connector is characterized by comprising a socket (2), a plug (3) and a leaf spring (1), wherein the leaf spring (1) comprises a cylindrical connecting plate (101) which is communicated left and right, a plurality of elastic sheets (102) are uniformly and vertically connected to the right end face of the cylindrical connecting plate (101) along the circumferential direction, a contact plate (103) is arranged at the tail end of each elastic sheet (102), and each contact plate (103) is bent inwards; the contact surfaces of the contact plates (103) are all located on the same circumferential surface, and the circumferential surface and the cylindrical connecting plate (101) are coaxial;

a first cavity matched with the leaf spring (1) is arranged in the central position in the socket (2), the right end of the first cavity is open, the leaf spring (1) can be inserted into the first cavity from right to left, and the left end surface of the cylindrical connecting plate (101) is fixedly connected with the wall surface in the socket (2) and positioned at the left end of the first cavity; a contact column (301) is vertically arranged at the center of the left end of the plug (3), the circumferential surface is an envelope surface matched with the contact column (301), and the contact column (301) can be inserted into the leaf spring (1) from right to left;

the electric connector also comprises an anchor ear (4), wherein the anchor ear (4) is provided with two opposite fastening plates (401), the two fastening plates (401) are respectively provided with a screw hole, and the two screw holes are right opposite; the hoops (4) are sleeved on the contact plates (103), and the two fastening plates (401) penetrate through the gap between any two elastic sheets (102); a third cavity for accommodating the two fastening plates (401) is arranged in the socket (2), the third cavity is communicated with the first cavity, and the right end of the third cavity is open; the leaf spring (1) and the hoop (4) are inserted into the socket (2) from right to left together, and the two fastening plates (401) are in a horizontal state; a first through hole (202) communicated with the third cavity is formed in the upper end face of the socket (2), and a fastening bolt (5) can penetrate through the first through hole (202) and the two screw holes from top to bottom to fasten the hoop (4); the hoop (4), the two fastening plates (401) and the fastening bolts (5) are made of insulating materials.

2. An electrical connector according to claim 1, characterized in that a second cavity for accommodating the head of the contact post (301) is further provided in the receptacle (2) at a position to the left of the first cavity, the second cavity and the first cavity are coaxial and communicate with each other, and the length of the contact post (301) is equal to the sum of the length of the second cavity and the length of the leaf spring (1).

3. The electrical connector according to claim 2, characterized in that the left end of the plug (3) is further provided with a contact column protective cover (302), the right end of the outer side of the socket (2) is provided with a convex part (203) matched with the contact column protective cover (302), the first through hole (202) is formed on the upper end surface of the convex part (203), the upper end surface of the contact column protective cover (302) is provided with a track groove (303) matched with the fastening bolt (5), and the left end of the track groove (303) is open; when the contact post (301) is fully inserted into the leaf spring (1) and the second cavity, the protrusion (203) is fully inserted into the contact post shield (302).

4. The electrical connector of claim 3, wherein a latch (201) is disposed at the root of the protrusion (203) at the front and rear sides of the plug (3), the front and rear sides of the contact post protective cover (302) are respectively and correspondingly provided with a fastening hole (304), and when the protrusion (203) is fully inserted into the contact post protective cover (302), the two latches (201) are respectively fastened into the corresponding fastening holes (304) from inside to outside.

5. The electrical connector according to claim 4, wherein the two latch blocks (201) are located at the middle position of the socket (2) in the height direction.

6. The electrical connector of claim 1, wherein the insulative material is plastic.

7. The electrical connector according to any one of claims 1 to 6, wherein the number of spring blades (102) is three.