KR102057240B1 - Spring contact terminal on the board with improved durability - Google Patents

Abstract

The present invention relates to a surface mount connection terminal having improved durability, and more particularly, a support portion soldered to a PCB substrate, an elastic portion and an elastic portion extending upward while being bent in multiple directions from the end of the support portion. It relates to a surface-mounted connection terminal with improved durability including a contact portion extending from the portion, the object to be contacted for electrical connection.
According to the present invention, the bending structure of the elastic part in multiple directions reduces the space occupied by the connection terminal while minimizing the overall height of the connection terminal, and at the same time stress is distributed to each bending part, thereby preventing deformation of the connection terminal And there is an effect that can sufficiently improve the durability.

Description

Spring contact terminal on the board with improved durability

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to surface mount connection terminals, and more particularly, to a surface mount connection terminal having improved durability capable of preventing deformation of the connection terminal from external forces while maintaining electrical connection between electronic components mounted on a PCB substrate. .

In general, the surface-mount connection terminal is used for electrical contact or signal transmission between two or more electronic components, and connects an antenna connection terminal of a communication device, a charging terminal of a battery charger, and a deck and a speaker of an audio device. This part is applied to contact terminals.

Recently, the importance of connection terminals is increasing for excellent performance in electrical contact or signal transmission between electronic components, and thus, a great deal of efforts are being made to develop and improve various types of connection terminals.

The type of connection terminal is broadly classified into a pin type and a plate spring type in which an elastic portion is formed by bending a metal plate, and the present invention relates to a connection terminal of a leaf spring type.

Such a leaf spring type connection terminal generally includes a support portion soldered to a substrate in the form of a C-clip, a connection portion directly connected to an external terminal such as an antenna, and a connection or impact of an external terminal to the connection portion. It consists of an elastic part (bending part) which gives elasticity to a connection part.

By the way, the conventional C-clip connection terminal is composed of only one elastic portion, there is a problem that the deformation load due to the connection or impact is concentrated on one elastic portion. That is, there is a problem that the elastic portion is easily damaged when repeated loads are applied.

To this end, Korean Patent Publication No. 10-1517840 discloses an 'S' shaped connection terminal consisting of two elastic parts. However, such a connection terminal also has a limit that the elastic portion is formed only in the direction facing each other, that is, left, right direction or front, rear direction, it can not evenly distribute the deformation load by the external force in the whole direction.

On the other hand, Korean Patent Publication No. 10-1644119 discloses "surface mounted type elastic electrical contact terminal". The prior art is a rolling structure in which the plate constituting the spring portion is rolled up in a spiral shape, which has the advantage of providing reliable elastic restoring force. This bending part has a disadvantage that is broken.

Korean Unexamined Patent Publication No. 10-2018-0002478 (published Jan 08, 2018)

An object of the present invention devised to solve the above problems is to provide a surface-mounted connection terminal with improved durability that can uniformly distribute the stress through a multi-directional bending structure.

In order to achieve the above object, the present invention provides a surface mount type connection terminal having improved durability, a support portion soldered to a PCB substrate, an elastic portion extended upward while being bent in multiple directions from an end of the support portion; The contact part extends from the elastic part and is in contact with an object to be electrically connected.

The elastic part may include a first bending part which is bent upwardly from the rear end of the supporting part toward the front, a second bending part which is extended from the first bending part and is bent upward toward the other side from the upper one side of the supporting part, and the second bending part. And a third bending portion extending from the upper portion to be bent upwardly from one side of the upper portion to the one side, and a fourth bending portion extending from the third bending portion to be bent upwardly from the upper rear side of the supporting portion.

A first elastic piece extending from the end of the first bending part toward the front of the supporting part, a second elastic piece bent from the end of the first elastic piece toward the second bending part and extending from the end of the second bending part; A third elastic piece extending toward a third bending portion, a fourth elastic piece extending toward one side of the support portion from the end of the third bending portion, and a fifth bending portion extending from the end of the fourth elastic piece toward the fourth bending portion; It includes an elastic piece.

The third elastic piece is formed to be bent toward the rear of the supporting portion, and consists of a pair of horizontal members facing each other and the arch member having a radius of constant curvature while connecting the ends of the horizontal member to restore elasticity It characterized in that it comprises a horizontal bending portion made of a possible leaf spring shape.

The arch member is characterized in that the expansion groove is concave inwardly formed.

The third elastic piece is characterized in that formed in the form inclined upward toward the third bending portion.

Grooves dug inwards on one side and the other side in the longitudinal direction of the first elastic piece and the fifth elastic piece, respectively.

The elastic part may include a first bending part which is bent upwardly from the rear end of the supporting part toward the front, a second bending part which is extended from the first bending part and is bent upward toward the other side from the upper one side of the supporting part, and the second bending part. A third bending portion extending from the upper portion to be bent upwardly from one side of the upper portion to the one side, a fourth bending portion extending from the third bending portion to bend upwardly from the upper portion of the supporting portion to the other side, the fourth bending portion And a fifth bending portion extending from the upper portion to be bent upwardly from the upper rear side of the support portion toward the front side.

A first elastic piece extending from the end of the first bending part toward the front of the supporting part, a second elastic piece bent from the end of the first elastic piece toward the second bending part and extending from the end of the second bending part; A third elastic piece extending toward a third bending part, a fourth elastic piece extending from the end of the third bending part toward the fourth bending part, and a fifth elastic piece extending from the end of the fourth elastic piece toward the other side of the support part; And a sixth elastic piece bent and extended from the end of the fifth elastic piece toward the fifth bending part.

The third elastic piece and the fourth elastic piece are formed to be bent toward the rear of the supporting portion, a pair of horizontal members facing each other and the arch member having a radius of constant curvature while connecting the ends of the horizontal member It characterized in that it comprises a first horizontal bending portion and the second horizontal bending portion made of a leaf spring shape capable of elastic recovery.

The arch member is characterized in that the expansion groove is concave inwardly formed.

The third elastic piece is formed in a form inclined upward toward the third bending portion, the fourth elastic piece is characterized in that it is made in a form inclined upward toward the fourth bending portion.

Grooves dug inwards on one side and the other side in the longitudinal direction of the first elastic piece and the sixth elastic piece, respectively.

It extends vertically upward from both ends of the supporting portion, a lower sidewall having a locking jaw bent toward the inside of the supporting portion at the top and extending downward from both ends of the contact portion, the lower end to be caught inside the locking jaw It characterized in that it comprises an upper side wall provided with a engaging piece bent toward the outside of the base portion.

According to the present invention, the bending structure in multiple directions of the elastic part minimizes the overall height of the connecting terminal while minimizing the space occupied by the connecting terminal, and at the same time, stress is distributed to each bending part, thereby preventing deformation of the connecting terminal. There is an effect that can sufficiently improve the durability.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention, and therefore, the present invention is limited only to the matters described in the drawings. It should not be interpreted.
1 to 3 are perspective views showing the surface-mounted connection terminal with improved durability according to an embodiment of the present invention,
4 and 5 are cross-sectional views showing a surface-mounted connection terminal with improved durability according to an embodiment of the present invention,
6 and 7 are perspective views showing the surface-mounted connection terminal with improved durability according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the surface-mounted connection terminal with improved durability according to the present invention.

1 to 3 are perspective views showing surface mount connection terminals having improved durability according to an embodiment of the present invention, and FIGS. 4 and 5 are cross-sectional views showing surface mount connection terminals having improved durability according to an embodiment of the present invention. to be.

1 to 5, the surface-mounted connection terminal having improved durability according to a preferred embodiment of the present invention is a component including a support part 100, an elastic part 200, and a contact part 300. This is made in detail as follows.

First, the connection terminal of the present invention, the support portion 100 and the contact portion 300 and the elastic portion 200 for connecting the support portion 100 and the contact portion 300 has an integrated structure.

The supporting part 100 is formed in a flat shape, and the lower surface is soldered to the PCB substrate for electrical connection with the PCB substrate (not shown). At this time, the support portion 100, while being fixed on the PCB serves to support the entire connection terminal.

The elastic part 200 serves to hold the horizontal state of the contact part 300 while elastically flowing when the object E and the contact part 300 for electrical connection are in contact with each other.

Here, the elastic portion 200 is formed in a form extending upward while bending in a multi direction from the end of the support portion 100.

Due to the bending structure of the elastic portion 200 in the multi direction, the stress is distributed to each bending portion, thereby minimizing the overall height of the connection terminal and sufficiently improving the durability of the connection terminal. Therefore, the space occupied by the connection terminal can be saved.

The contact part 300 extends from the elastic part 200 and contacts the object E for electrical connection while maintaining a horizontal posture at all times.

Meanwhile, the elastic part 200 will be described in more detail. The elastic part 200 includes a first bending part 210, a second bending part 220, a third bending part 230, and a fourth bending part. 240.

The first bending part 210 is formed to be bent upward from the rear end of the supporting part 100 toward the front. The second bending part 220 extends from the first bending part 210 to be bent upwardly toward the other side from the upper one side of the supporting part 100.

Here, the first elastic piece 211 and the second elastic piece connecting the first bending part 210 and the second bending part 220 between the first bending part 210 and the second bending part 220. 212 is provided.

In other words, the first elastic piece 211 extends from the end of the first bending part 210 toward the front of the support part 100, and the second bending part 220 at the end of the first elastic piece 211. It is bent toward the second elastic piece 212 is formed to extend.

In this case, grooves 211a and 211b which are dug inwards may be further formed in one side and the other side in the longitudinal direction of the first elastic piece 211. Due to the grooves 211a and 211b, the width of the first elastic piece 211 is locally reduced, so that the stress can be uniformly dispersed in the elastic piece. In other words, the stress distribution can be made uniform.

That is, when the length of the elastic piece is generally lengthened by the formation of the grooves 211a and 211b, when a force is applied to the increasingly elastic part, the stress due to the dispersion of the force decreases as the length of the elastic piece becomes longer, thereby preventing deformation of the connection terminal. Will be.

The third bending part 230 extends from the second bending part 220 to be bent upwardly toward the opposite side from the other side of the upper part of the base 100.

Here, a third elastic piece 221 connecting the second bending part 220 and the third bending part 230 is provided between the second bending part 220 and the third bending part 230. The three elastic pieces 221 may be formed to extend upwardly inclined toward the third bending portion 230 at the end of the second bending portion 220.

In this case, the third elastic piece 221 may include a horizontal bending part 260 composed of a horizontal member 261 and an arch member 262. The horizontal member 261 is formed integrally bent toward the rear of the support portion 100 in the third elastic piece 221, the pair is made of a non-contact with each other while facing each other.

The arch member 262 is formed in a shape having a radius of constant curvature while connecting the ends of each horizontal member 261.

In this case, the arch member 262 may be further formed with an inwardly recessed expansion groove 262a.

That is, in the horizontal bending part 260, the distance between the horizontal members 261 that are not in contact with each other increases the distance that the force is transmitted, thereby reducing the stress due to the dispersion of the force, thereby preventing deformation of the connection terminal. .

In addition, due to the expansion groove 262a formed inside the arch member 262, it is possible to prevent concentration of stress.

In other words, it is possible to disperse the stress by lengthening the third elastic piece 221 formed at the center of the elastic part 200 to one side and increasing the distance by which the force is transmitted by dividing the middle part.

The fourth bending part 240 extends from the third bending part 230 and is bent upwardly from the upper rear of the support part 100 toward the front.

Here, the fourth elastic piece 231 and the fifth elastic piece connecting the third bending portion 230 and the fourth bending portion 240 between the third bending portion 230 and the fourth bending portion 240. 241 is provided.

In other words, a fourth elastic piece 231 extends from one end of the third bending part 230 toward one side of the support part 100, and the fourth bending part at the end of the fourth elastic piece 231. The fifth elastic piece 241 is formed to be bent toward 240 to extend.

In this case, grooves 241a and 241b which are dug inwards may be further formed on one side and the other side in the longitudinal direction of the fifth elastic piece 241. Because of the grooves 241a and 241b, the width of the fifth elastic piece 241 is locally reduced, so that the stress can be uniformly distributed to the elastic piece. In other words, the stress distribution can be made uniform.

That is, when the length of the elastic piece is totally lengthened by the formation of the grooves 241a and 241b, when the force is applied to the gradually extending portion 300, the length of the elastic piece is increased, so that the stress due to the dispersion of the force is lowered, thereby deforming the connection terminal. It can be prevented.

On the other hand, the connection terminal of the present invention is composed of a component including a lower side wall 110 and an upper side wall 310.

The lower side wall 110 extends vertically upward from both ends of the base 100, and has a locking step 111 bent toward the inside of the base 100 at an upper end thereof.

In addition, the upper sidewall 310 extends downward from both ends of the contact portion 300, and the locking piece 311 bent toward the outside of the support portion 100 at the lower end thereof so as to be caught inside the locking step 111. ) Is provided.

The lower sidewall 110 has a locking jaw 111 formed by bending the upper side of the lower sidewall 110 even when the object E presses the contact portion 300 downward to contract the elastic portion 200. The object E may be seated on the upper surface to prevent the elastic portion 200 from being compressed anymore. That is, in FIG. 5, the movable distance L of the elastic part 200 by the pressurization of the to-be-tested object E is shown.

In addition, since the locking piece 311 formed at the lower end of the upper side wall 310 is caught inside the locking step 111 of the lower side wall 110 to prevent separation, the contact part 300 is deformed upward by an external force. Can be prevented.

6 and 7 are perspective views showing the surface-mounted connection terminal with improved durability according to another embodiment of the present invention.

6 and 7, the surface mount type connection terminal having improved durability according to another exemplary embodiment of the present invention may include a component including a support part 100, an elastic part 200, and a contact part 300. Is made of.

Here, a detailed description of the configuration of the base portion 100 and the contact portion 300 will be omitted as the same components as the embodiment of the present invention described above with reference to FIGS.

The elastic part 200 includes a first bending part 210, a second bending part 220, a third bending part 230, a fourth bending part 240, and a fifth bending part 250.

The first bending part 210 is formed to be bent upward from the rear end of the supporting part 100 toward the front. The second bending part 220 extends from the first bending part 210 to be bent upwardly toward the other side from the upper one side of the supporting part 100.

Here, the first elastic piece 211 and the second elastic piece connecting the first bending part 210 and the second bending part 220 between the first bending part 210 and the second bending part 220. 212 is provided.

In other words, the first elastic piece 211 extends from the end of the first bending part 210 toward the front of the support part 100, and the second bending part 220 at the end of the first elastic piece 211. It is bent toward the second elastic piece 212 is formed to extend.

In this case, grooves 211a and 211b which are dug inwards may be further formed in one side and the other side in the longitudinal direction of the first elastic piece 211. Due to the grooves 211a and 211b, the width of the first elastic piece 211 is locally reduced, so that the stress can be uniformly dispersed in the elastic piece. In other words, the stress distribution can be made uniform.

That is, when the length of the elastic piece is generally lengthened by the formation of the grooves 211a and 211b, when a force is applied to the increasingly elastic part, the stress due to the dispersion of the force decreases as the length of the elastic piece becomes longer, thereby preventing deformation of the connection terminal. Will be.

The third bending part 230 extends from the second bending part 220 to be bent upwardly toward the opposite side from the other side of the upper part of the base 100.

Here, a third elastic piece 221 connecting the second bending part 220 and the third bending part 230 is provided between the second bending part 220 and the third bending part 230. The three elastic pieces 221 may be formed to extend upwardly inclined toward the third bending portion 230 at the end of the second bending portion 220.

In this case, the third elastic piece 221 may include a first horizontal bending part 270 including the horizontal member 271 and the arch member 272. The horizontal member 271 is formed integrally bent toward the rear of the base portion 100 in the third elastic piece 221, the pair is in contact with each other, made of a form facing each other.

The arch member 272 is formed in a shape having a radius of a constant curvature while connecting the ends of each horizontal member 271.

In this case, the arch member 272 may be further formed with an inwardly recessed expansion groove 272a.

That is, the first horizontal bending portion 270, the distance between the force transmission due to the space between the horizontal member 271, which is in non-contact with each other increases the stress due to the dispersion of the force can be reduced to prevent deformation of the connection terminal Will be.

In addition, it is possible to prevent the concentration of stress due to the expansion groove 272a formed inside the arch member 272.

The fourth bending part 240 extends from the third bending part 230 and is bent upwardly toward the other side from the upper one side of the supporting part 100.

Here, a fourth elastic piece 231 connecting the third bending part 230 and the fourth bending part 240 is provided between the third bending part 230 and the fourth bending part 240. The four elastic pieces 231 may be formed to extend in an inclined upward direction from the end of the third bending part 230 toward the fourth bending part 240.

In this case, the fourth elastic piece 231 may include a second horizontal bending part 280 composed of a horizontal member 281 and an arch member 282. The horizontal member 281 is formed integrally bent toward the rear of the base portion 100 in the fourth elastic piece 231, the pair is in contact with each other, made of a form facing each other.

The arch member 282 is formed in a shape having a radius of a constant curvature while connecting the ends of each horizontal member 281.

At this time, the arch member 282 may be further formed with an inwardly recessed expansion groove 282a.

That is, the second horizontal bending portion 280, because the distance between the force is increased due to the space between the horizontal members 281 which are in non-contact with each other, the stress due to the dispersion of the force is lowered to prevent deformation of the connection terminal Will be.

In addition, the expansion groove 282a formed inside the arch member 282 may prevent concentration of stress.

In other words, while extending the third elastic piece 221 and the fourth elastic piece 231 formed at the center of the elastic portion 200 to one side and dividing the middle portion to increase the distance that the force is transmitted to distribute the stress It can be.

The fifth bending part 250 extends from the fourth bending part 240 to be bent upwardly upward from the rear of the base 100 to the front.

Here, between the fourth bending part 240 and the fifth bending part 250, the fifth elastic piece 241 and the sixth elastic piece connecting the fourth bending part 240 and the fifth bending part 250. 251 is provided.

In other words, the fifth elastic piece 241 extends from the end of the fourth bending part 240 toward the other side of the support part 100, and the fifth bending part at the end of the fifth elastic piece 241. The sixth elastic piece 251 is formed to be bent toward 250.

In this case, grooves 251a and 251b which are dug inwards may be further formed on one side and the other side in the longitudinal direction of the sixth elastic piece 251. Due to the grooves 251a and 251b, the width of the sixth elastic piece 251 is locally reduced, so that the stress can be uniformly dispersed in the elastic piece. In other words, the stress distribution can be made uniform.

That is, when the length of the elastic piece is totally lengthened by the formation of the grooves 251a and 251b, when the force is applied to the gradually extending portion 300, the length of the elastic piece becomes longer and the stress due to the dispersion of the force is lowered, thereby deforming the connection terminal. It can be prevented.

In the above, the present invention has been described based on the preferred embodiments, but the technical idea of the present invention is not limited thereto, and modifications or changes can be made within the scope of the claims. It will be apparent to those skilled in the art, and such modifications and variations will belong to the appended claims.

100: base 110: lower side wall
111: engaging jaw 200: elastic portion
210: first bending part 211: first elastic piece
211a, 211b, 241a, 241b, 251a, 251b: groove
212: second elastic piece 220: second bending part
221: third elastic piece 230: third bending portion
231: fourth elastic piece 240: fourth bending portion
241: fifth elastic piece 250: fifth bending part
251: sixth elastic piece 260: horizontal bending portion
261, 271, 281: horizontal member 262, 272, 282: arch member
262a, 272a, and 282a: expansion groove 270: first horizontal bending portion
280: second horizontal bending portion 300: contact portion
310: upper sidewall 311: locking piece

Claims (14)

Support portion 100 is soldered to the PCB substrate; An elastic part 200 extending upward while being bent in a multi direction from an end of the supporting part 100; And a contact portion 300 extending from the elastic portion 200 and to which an object to be contacted for electrical connection is contacted.
The elastic part 200 may include a first bending part 210 that is bent upwardly from the rear end of the support part 100 toward the front; A second bending part 220 extending from the first bending part 210 and bent upwardly from the upper one side of the support part 100 toward the other side; A third bending part 230 extending from the second bending part 220 and bent upwardly from one side of the upper part of the support part 100 toward one side; And a fourth bending part 240 extended from the third bending part 230 and bent upwardly from the upper rear of the support part 100 toward the front.
A first elastic piece 211 extending from the end of the first bending part 210 toward the front of the support part 100; A second elastic piece 212 extending from the end of the first elastic piece 211 toward the second bending part 220; A third elastic piece 221 extending from the end of the second bending part 220 toward the third bending part 230; A fourth elastic piece 231 extending from one end of the third bending part 230 toward one side of the support part 100; And a fifth elastic piece 241 that is bent and extended toward the fourth bending part 240 at the end of the fourth elastic piece 231. Including;
The third elastic piece (221) is a surface-mounted connection terminal with improved durability, characterized in that formed in the form inclined upward toward the third bending portion 230. delete delete The method of claim 1, wherein the third elastic piece 221,
The arch member 262 which is formed to be bent toward the rear of the supporting part 100 and has a radius of constant curvature while connecting a pair of horizontal members 261 facing each other and corresponding ends of the horizontal members 261. A horizontal bending part 260 having a leaf spring shape configured to be elastically restored;
Durable surface-mounted connection terminal characterized in that it further comprises. The method of claim 4, wherein the arch member 262,
Expansion grooves 262a recessed inwardly; The surface-mounted connection terminal with improved durability, characterized in that further formed. delete The method of claim 1,
Grooves 211a, 211b, 241a, and 241b which are recessed inward in one side and the other in the longitudinal direction of the first elastic piece 211 and the fifth elastic piece 241, respectively; Surface-mounted connection terminal with improved durability, characterized in that further formed. Support portion 100 is soldered to the PCB substrate; An elastic part 200 extending upward while being bent in a multi direction from an end of the supporting part 100; And a contact portion 300 extending from the elastic portion 200 and to which an object to be contacted for electrical connection is contacted.
The elastic part 200 may include a first bending part 210 that is bent upwardly from the rear end of the support part 100 toward the front; A second bending part 220 extending from the first bending part 210 and bent upwardly from the upper one side of the support part 100 toward the other side; A third bending part 230 extending from the second bending part 220 and bent upwardly from one side of the upper part of the support part 100 toward one side; A fourth bending part 240 extended from the third bending part 230 and bent upwardly from the upper one side of the support part 100 toward the other side; And a fifth bending part 250 extending from the fourth bending part 240 to be bent upwardly from the upper rear of the support part 100 toward the front.
A first elastic piece 211 extending from the end of the first bending part 210 toward the front of the support part 100; A second elastic piece 212 extending from the end of the first elastic piece 211 toward the second bending part 220; A third elastic piece 221 extending from the end of the second bending part 220 toward the third bending part 230; A fourth elastic piece 231 extending from the end of the third bending part 230 toward the fourth bending part 240; A fifth elastic piece 241 extending from the end of the fourth elastic piece 231 toward the other side of the support part 100; And a sixth elastic piece 251 that is bent and extended from the end of the fifth elastic piece 241 toward the fifth bending part 250.
The third elastic piece 221 is formed in the form inclined upward toward the third bending portion 230, the fourth elastic piece 231 is in the form inclined upward toward the fourth bending portion 240. Durable surface-mount connection terminal characterized in that made. delete The method of claim 8,
The third elastic piece 221 and the fourth elastic piece 231 are bent toward the rear of the base portion 100, and a pair of horizontal members 271 and 281 facing each other and the, The first horizontal bending portion 270 and the second horizontal bending, which are formed of arch members 272 and 282 having a constant radius of curvature and connected to the ends of the horizontal members 271 and 281, have a leaf spring shape that can be elastically restored. Part 280;
Durable surface-mounted connection terminal characterized in that it further comprises. The method of claim 10, wherein the arch members (272, 282),
Expansion grooves 272a and 282a which are concave inwardly; The surface-mounted connection terminal with improved durability, characterized in that further formed. delete The method of claim 8,
Grooves 211a, 211b, 251a, and 251b which are recessed inward in one side and the other in the longitudinal direction of the first elastic piece 211 and the sixth elastic piece 251, respectively; Surface-mounted connection terminal with improved durability, characterized in that further formed. The method of claim 1,
A lower sidewall 110 extending vertically from both ends of the supporting part 100 and having a locking step 111 bent toward the inside of the supporting part 100 at an upper end thereof; And
An upper sidewall extending downward from both ends of the contact part 300, and having a locking piece 311 bent toward the outside of the support part 100 at a lower end thereof so as to be caught inside the locking step 111; 310);
Surface-mounted connection terminal with improved durability, comprising a.

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