KR20230053386A - Pogo pin - Google Patents

Abstract

The present invention a pogo pin, and more specifically, to a pogo pin, wherein a top plunger located at the top of the pogo pin and a bottom plunger located at the bottom of the pogo pin are relatively displaced to each other, but the relative displacements of the top plunger and bottom plunger are stably guided and coupling of the top plunger and bottom plunger is maintained stably, thereby reducing positional distortion and improving electrical signal transmission efficiency.

Description

POGO PIN {POGO PIN}

The present invention relates to a pogo pin, wherein a top plunger located at the top and a bottom plunger located at the bottom are displaced relative to each other, the relative displacement of the top plunger and the bottom plunger is stably guided and the coupling is stably maintained, so that the position A pogo pin with less distortion and improved electrical signal transmission efficiency.

In order to electrically connect various electrical members, such as semiconductor devices, to each other, press-fit connectors such as pogo pins are used.

In such a pogo pin, electrical contact between plungers constituting the pogo pin is very important. For example, when the pogo pin is operated, the position between the plungers is distorted and the shape collapses, so that the reliability of the electrical contact between the plungers is not maintained, or when the contact area between the plungers is small, the electrical signal transmission efficiency may be very low. .

Therefore, there is a need to develop a pogo pin that solves these problems, prevents displacement, and improves electrical signal transmission efficiency.

Patent Publication No. 10-2011-0048446

The present invention has been made to solve the above problems, and the top plunger located at the top and the bottom plunger located at the bottom relatively displace each other, but the relative displacement of the top plunger and the bottom plunger is stably guided and the coupling is stable. As it is maintained, the object is to provide a pogo pin in which positional displacement is reduced and electrical signal transmission efficiency is improved.

A pogo pin comprising: a top plunger located on an upper portion; Bottom plunger located in the lower part; and a spring positioned between the top plunger and the bottom plunger to apply elasticity in a direction in which the top plunger and the bottom plunger move away from each other, wherein the top plunger includes a first body portion extending in a vertical direction, and the first body portion extending in a vertical direction. A support part protruding in at least one direction of the body part, and a connection protrusion provided on the front surface of the first body part and protruding forward, wherein the bottom plunger includes a second body part having a hollow penetrating in a vertical direction, and a connection line formed in a front part of the second body and extending in an up-and-down direction, wherein the connection line is formed of a through-hole punched in a front-back direction in at least a portion of a front surface of the second body, and the top plunger When the bottom plunger and the bottom plunger are coupled, the spring is located between the top plunger and the bottom plunger, at least a portion of the first body of the top plunger is inserted into the hollow of the bottom plunger, and the connection protrusion is connected to the bottom plunger. Located within the line portion, the top plunger and the bottom plunger slide in a vertical direction to displace each other, and the connecting protrusion is located within the connecting line portion to guide relative displacement of the top plunger and the bottom plunger in a vertical direction.

According to one embodiment, the first body portion is composed of a plate having a predetermined width in the lateral direction and a predetermined thickness in the front-back direction, and the connection protrusion is punched forward on the rear surface of the first body , It is composed of a three-dimensional part that protrudes forward and sinks backward.

According to one embodiment, the connection protrusion includes a flat surface formed on an upper surface, and the flat surface is caught on an upper end of the connection line unit.

According to one embodiment, the connecting protrusion includes a slope surface formed on the front surface, and the width of the slope surface protrudes forward from the bottom to the top increases.

According to one embodiment, the bottom plunger further includes a guide line formed on a front portion of an inner surface of the hollow, positioned above the connection line portion, and extending vertically.

According to one embodiment, the depth of the front-back direction of the guide line, the upper part has a deeper depth than the lower part.

According to one embodiment, the bottom plunger is configured in the form of a cannula in which a plate having a predetermined thickness and area is bent so that both side end portions of the plate come into contact with each other and the hollow is formed inside the plate.

According to one embodiment, the plate, a first hook protruding in the lateral direction at one end in the lateral direction and protruding and sinking in the forward and backward directions, and a first hook recessed in the lateral direction at the other end in the lateral direction and protruding and sinking in the front and rear directions. It includes 2 hooks, and when the plate is bent, the first hook is inserted into the second hook.

According to one embodiment, the first body portion is inserted into the spring, and the spring is located between the support portion and the second body portion.

According to one embodiment, at least a portion of the first body is in close contact with the inner surface of the second body.

According to one embodiment, the front and rear surfaces of the first body are in close contact with the front and rear surfaces of the inner surface of the second body, respectively.

In the pogo pin according to the present invention, the relative displacement between the top plunger and the bottom plunger is guided more stably, and the positional displacement prevention effect can be improved. Also, since the shape of the bottom plunger is maintained and the electrical connection between the top plunger 100 and the bottom plunger 200 is maintained, electrical signal transmission efficiency may be improved.

1 is a diagram showing the structure of a pogo pin according to an embodiment of the present invention.
2 is a view showing a separation structure of a pogo pin according to an embodiment of the present invention.
3 is a view showing a cross-sectional structure of a pogo pin according to an embodiment of the present invention, and is a view showing a cross-section along the AA direction of FIG.
4 and 5 are diagrams showing the structure of the pogo pin according to the embodiment, which are enlarged views of the lower end of the top plunger.
6 is a view showing a cross-sectional structure of a bottom plunger of a pogo pin according to an embodiment of the present invention, and is a view showing a cross-section along the BB direction of FIG. 2 .
7 is a view showing a manufacturing method of a bottom plunger of a pogo pin according to an embodiment of the present invention.
8 and 9 are views showing a bottom plunger of a pogo pin according to an embodiment of the present invention.
10 is a view showing a manufacturing process of a pogo pin according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings.

1 is a view showing the structure of a pogo pin according to an embodiment of the present invention, and FIG. 2 is a view showing a separated structure of a pogo pin according to an embodiment of the present invention. 3 is a view showing a cross-sectional structure of a pogo pin according to an embodiment of the present invention, and is a view showing a cross-section along the A-A direction of FIG. 4 and 5 are diagrams showing the structure of the pogo pin according to the embodiment, which are enlarged views of the lower end of the top plunger 100. FIG. 6 is a view showing a cross-sectional structure of a bottom plunger 200 of a pogo pin according to an embodiment of the present invention, and is a view showing a cross-section along the B-B direction of FIG. 2 .

In the following description, front and rear, left and right, and up and down directions are described based on the direction shown in FIG. 2 . That is, the left-right direction is the X-axis direction, the front-back direction is the Y-axis direction, and the up-down direction is the Z-axis direction.

A pogo pin according to an embodiment of the present invention includes a top plunger 100, a bottom plunger 200, and a spring 300.

<Top Plunger (100)>

The top plunger 100 constitutes an upper part of the pogo pin.

The top plunger 100 includes a first body part 110 , a support part 120 , and a connection protrusion part 130 .

The first body portion 110 is a bar-shaped portion extending in the vertical direction.

According to the embodiment, a solid shape such as, for example, a crown may be formed at the upper end of the first body portion 110 . Accordingly, electrical contact between the upper portion of the first body portion 110 and the terminal portion (not shown) of the semiconductor chip package placed on the pogo pin can be effectively made.

In addition, according to the embodiment, a chamfer portion is formed at the lower end of the first body portion 110 to have a curved edge. Therefore, when the top plunger 100 is put into the hollow 212 of the bottom plunger 200 and the top plunger 100 and the bottom plunger 200 are coupled, the lower end of the first body 110 collides or rubs doing may decrease.

The support part 120 is a part protruding in at least one side direction of the first body part 110 . For example, the support part 120 may protrude in both left and right lateral directions of the first body part 110 .

The connection protrusion 130 may be formed on the front surface of the first body part 110 . However, according to the viewing direction of the pogo pin according to the embodiment of the present invention, the position where the connection protrusion 130 is formed may be not the front surface of the first body part 110 but the side surface or rear surface of the first body part 110 .

5 and 6 are enlarged views of the portion where the connecting protrusion 130 is formed. According to the embodiment, the first body portion 110 may be composed of a plate having a predetermined width in the lateral direction and a predetermined thickness in the front-back direction. At this time, the connecting protrusion 130 is formed by pressing or punching the rear surface of the first body portion 110 forward, and may be configured as a three-dimensional structure in which the front surface protrudes forward and the rear surface is depressed. . That is, in response to the connection protrusion 130 protruding forward, a depression 136 may be formed at the rear of the connection protrusion 130 . Accordingly, the connection protrusion 130 may be formed through simple processing once or multiple times.

According to the embodiment, the connection protrusion 130 may include a flat surface 132 formed on an upper surface. Accordingly, when the top plunger 100 is inserted into the bottom plunger 200, the flat surface 132 may be caught on the upper end of the connection line part 220 to be described later. Accordingly, unintentional separation between the top plunger 100 and the bottom plunger 200 can be prevented.

According to the embodiment, the connection protrusion 130 may include a slope surface 134 formed on the front surface. Describing the specific shape of the slope surface 134 , it can be explained that the protruding width of the connection protrusion 130 in the front-back direction increases from bottom to top. Therefore, when the top plunger 100 is inserted into the bottom plunger 200, the connecting protrusion may not cause excessive friction or damage to the bottom plunger 200, and a smooth coupling may be achieved.

<Bottom Plunger (200)>

The bottom plunger 200 constitutes a lower part of the pogo pin.

The bottom plunger 200 includes a second body part 210 having a hollow 212 penetrating in the vertical direction, and a connection line part 220 formed in the second body part 210 .

The second body portion 210 is configured in a tubular shape having a hollow 212 penetrating in the vertical direction. Preferably, the hollow 212 may have a rectangular shape when viewed from above or below. That is, it may have a front surface and a rear surface having a flat surface shape.

According to the embodiment, the upper portion of the second body portion 210 may be configured as a flat flat surface. Therefore, it is possible to support the lower portion of the spring 300 to be described later. In addition, a contact tip portion 240 protruding downward may be provided at the lower end of the second body portion 210 . As the contact tip 240 is provided, electrical contact between the lower end of the pogo pin and a predetermined terminal (not shown) of a PCB placed under the pogo pin can be effectively made. According to the embodiment, the contact tip portion 240 may have one or more bent portions 242 and 244 and be bent. Accordingly, the lower end of the contact tip 240 may extend vertically from a position close to the center of the bottom plunger 200 . Accordingly, it is possible to prevent twisting or dislocation from occurring when contacting an external electrical terminal (not shown).

The connection line part 220 is formed on the front surface of the second body part 210 and may be configured as a through hole extending in the vertical direction and drilled in the front-rear direction. Here, the front side is a direction in which the connection protrusion 130 is positioned when the top plunger 100 and the bottom plunger 200 are coupled. However, according to the viewing direction of the pogo pin according to the embodiment of the present invention, the position where the connection line part 220 is formed may be not the front surface of the second body part 210, but may be the side surface or the rear surface. A specific shape of the connection line unit 220 may be a rectangular shape having a long width in the vertical direction.

The bottom plunger 200 may further include a guide line 230 . The guide line 230 is formed on the front portion of the inner surface of the hollow 212 and may be formed on the upper portion of the connection line portion 220 . The guide line 230 may be configured as a groove extending vertically, having a predetermined depth in the front-back direction and a predetermined width in the left-right direction. According to the embodiment, the width of the guide line 230 in the left-right direction may be greater than or equal to the width of the connection protrusion 130 in the left-right direction.

Also, according to the embodiment, as shown in FIG. 6 , the depth of the front-back direction of the guide line 230 may have a greater depth in the upper part than in the lower part. For example, as to the depth of the guide line 230, a portion adjacent to the upper end of the second body portion 210 may have the deepest depth, and a portion adjacent to the connection line portion 220 may have the shallowest depth.

7 is a view showing a method of manufacturing a bottom plunger 200 of a pogo pin according to an embodiment of the present invention. 8 is a view showing a bottom plunger 200 of a pogo pin according to an embodiment of the present invention.

Hereinafter, a manufacturing method and configuration of the bottom plunger 200 will be described with reference to FIGS. 7 and 8 .

As shown in FIG. 7 , the bottom plunger 200 may be manufactured using a plate P having a predetermined thickness and area and manufactured by a press process.

The plate P may have a rectangular shape as a whole and may have a protruding tip protruding downward at a lower end thereof. The protruding tip may function as the contact tip portion 240 described above. The connection line part 220 and the guide line 230 may be formed and processed on the plate P. The forming process of the connection line part 220 and the guide line 230 may be performed by punching, pressing process, molding process, etc., and the processing method is not limited.

The bottom plunger 200 may be manufactured by bending the plate P. At this time, according to the embodiment, the plate (P) is provided with a first hook 250 on one side (eg, the left side) with the center line (C) as the center, and a second hook (eg, on the right side) on the opposite side (eg, the right side) 260) may be provided. The first hook 250 is a protrusion that protrudes in the lateral direction, and may have a hook head 252 that protrudes in the forward and backward directions at the lateral end. The second hook 260 is a recessed portion that is recessed in the lateral direction, and may include a hook groove portion 262 that is recessed in the front-rear direction at the inner side in the lateral direction.

As shown in FIG. 8 , the bottom plunger 200 may be manufactured by bending so that the left and right end surfaces of the plate P come into contact with each other. At this time, the first hook 250 is inserted into the second hook 260 . In addition, the hook head 252 is inserted into the hook groove 262 . Accordingly, the first hook 250 and the second hook 260 are engaged with each other.

As shown in FIG. 8 , the bottom plunger 200 is processed in such a way that the plate P is bent so that both end portions of the side surfaces of the plate P come into contact with each other. Therefore, both end portions of the side surfaces of the plate P come into contact, so that the first hook 250 and the second hook 260 are fastened to each other, in the form of a cannula having a rectangular hollow 212 as a whole. may consist of

The effect of providing the first hook 250 and the second hook 260 as described above is as follows. During the coupling process between the top plunger 100 and the bottom plunger 200 and the process of using the pogo pin, the bottom plunger 200 may be prevented from being opened and deformed (ie, the width of the hollow 212 increases). there is. Accordingly, the shape of the bottom plunger 200 may be maintained. Therefore, the top plunger 100 contacting the inner surface of the hollow 212 of the bottom plunger 200 can be maintained in contact with the inner surface of the hollow 212 of the bottom plunger 200, and the bottom plunger 200 and the top plunger 200 can be maintained. Electrical contact and connection between the plungers 100 can be effectively achieved.

In addition, as described above, since the bottom plunger 200 is manufactured by bending the pressed plate P, the manufacturing process of the pogo pin can be simplified and the manufacturing cost can be reduced.

At this time, as described above, the hollow 212 may have a rectangular shape. Therefore, as shown in FIG. 3 , when the top plunger 100 is inserted into the hollow 212, the front and rear inner surfaces of the top plunger 100 are respectively placed on the front and rear inner surfaces of the second body 210. The sides may touch. Also, as described above, displacement between the top plunger 100 and the bottom plunger 200 can be prevented. Accordingly, electrical contact between the top plunger 100 and the bottom plunger 200 can be effectively made, and electrical signal transmission efficiency can be improved.

In addition, according to the embodiment, a pressing portion 214 composed of a coining shape may be provided at a portion where the left end surface and the right end surface of the plate P come into contact with each other. The pressing portion 214 may be formed, for example, at a portion where the first hook 250 and the second hook 260 are fastened to each other. The pressing part 214 is a part in which the left end surface and the right end surface of the plate P are partially plastically deformed due to pressing by pressing the part, so that they come into close contact with each other or one part can be overlapped. . Accordingly, the left end surface and the right end surface of the plate P are strongly fastened to each other, and the shape can be maintained more effectively. In particular, when the top plunger 100 is inserted into the bottom plunger 200, it is possible to effectively prevent the bottom plunger 200 from being opened and deformed.

Also, as shown in FIG. 9 , according to an embodiment, the contact tip portion 240 may have a shape portion 246 having a transition shape. The transition shape is used for terminal molds in connector-related products, and is a shape that can prevent the tip portion from being deformed when external force is applied in the vertical direction, for example. As described above, since the shape portion 246 having the transition shape is provided, the contact tip portion 240 may maintain its shape without being deformed when an external force is applied to the contact tip portion 240 .

<Spring (300)>

The spring 300 may be a coil spring 300 through which the center is penetrated. The spring 300 may have a predetermined height in the vertical direction and a predetermined width (diameter) in the lateral direction.

At least a portion of the top plunger 100 is interpolated within the spring 300 . At this time, the part where the top plunger 100 is inserted into the spring 300 is the lower part of the support part 120 .

<Coupling relationship, operation, and effect of top plunger 100, bottom plunger 200, and spring 300>

10 (a), (b) and (c) are diagrams illustrating a process of coupling a pogo pin according to an embodiment of the present invention.

The top plunger 100 is coupled through the spring 300 . Subsequently, as shown in (b), the lower end of the top plunger 100 is inserted into the hollow 212 of the bottom plunger 200 as shown by arrow P.

When the coupling is completed, the spring 300 is located between the upper end of the bottom plunger 200 and the support 120 of the top plunger 100, and is elastic in a direction in which the top plunger 100 and the bottom plunger 200 move away from each other. can be added. However, it is not necessarily limited thereto, and the bottom plunger 200 may also have a predetermined supporting means, and the spring 300 may be positioned between the supporting means and the supporting part 120 of the top plunger 100.

Accordingly, when an external force is applied in the direction of pressing the pogo pin, the top plunger 100 and the bottom plunger 200 are relatively displaced in a direction in which they come closer to each other, and the spring 300 is compressed, so that the overall length of the pogo pin can be shortened. In addition, when the external force is removed, the top plunger 100 and the bottom plunger 200 are relatively displaced in a direction away from each other by the elastic force of the spring 300, so that the length of the pogo pin can be restored.

As described above, the lower end of the first body 110 of the top plunger 100 is inserted into the hollow 212 of the bottom plunger 200 . At this time, the connection protrusion 130 passes through the guide line 230 and is inserted into the connection line unit 220 . Accordingly, the guide line 230 may guide the connection protrusion 130 to be smoothly inserted into the connection line unit 220 . At this time, according to the embodiment, since the depth of the guide line 230 in the front-back direction is deeper than that of the lower part, the upper part has a guide effect as described above and is connected to the connection protrusion 130 at the same time. The hooking width between the line parts 220 may not decrease.

When the top plunger 100 and the bottom plunger 200 are coupled to each other, the connection protrusion 130 of the top plunger 100 is positioned within the connection line portion 220 of the bottom plunger 200 . Accordingly, the relative displacement between the top plunger 100 and the bottom plunger 200 in the vertical direction can be guided. That is, relative displacement of the top plunger 100 and the bottom plunger 200 may be guided in the vertical direction along the extension direction of the connection line portion 220 . Therefore, when the top plunger 100 and the bottom plunger 200 are relatively displaced from each other, displacement is prevented, and the shape of the pogo pin is prevented from collapsing during operation. Accordingly, the front and rear surfaces of the first body part 110 of the top plunger 100 may come into close contact with the front and rear surfaces of the inner surfaces of the second body part 210 of the bottom plunger 200, respectively.

Also, according to the embodiment, in a state where no external force is applied, the upper end of the connection protrusion 130 may come into contact with the upper end of the connection line part 220 and be caught. At this time, since the flat surface 132 is formed on the upper end of the connection protrusion 130 and the connection line part 220 has a rectangular shape, the upper end of the connection protrusion 130 and the upper end of the connection line part 220 are formed. Abutting each other, the jamming can be maintained.

In addition, according to the embodiment, the bottom plunger 200 includes a first hook 250 and a second hook 260, so that the coupling process between the top plunger 100 and the bottom plunger 200 and the use of a pogo pin In the process, the bottom plunger 200 may be prevented from being opened and deformed (ie, the width of the hollow 212 increases). Accordingly, the shape of the bottom plunger 200 is maintained, and contact between the bottom plunger 200 and the top plunger 100 can be effectively achieved.

Also, according to the embodiment, a portion of the connection line portion 220 and an inner surface of the connection protrusion 130 may maintain contact with each other. According to one embodiment, both side parts of the connection line part 220 may come into contact with inner surfaces in both lateral directions of the connection protrusion part 130 . In this case, the left-right width of the connection line portion 220 may have a size corresponding to that of the connection protrusion 130 in the left-right direction. Thus, a stable electrical connection can be maintained.

According to the present embodiment, the relative displacement between the top plunger 100 and the bottom plunger 200 is guided more stably, and the effect of preventing displacement may be improved. In addition, since the connection line part 220 maintains contact with the connection protrusion 130, the electrical connection between the top plunger 100 and the bottom plunger 200 is maintained, and electrical signal transmission efficiency can be improved. .

Although preferred embodiments have been shown and described above, the present invention is not limited to the specific embodiments described above, and ordinary knowledge in the art to which the present invention belongs without departing from the gist of the present invention claimed in the claims Of course, various modifications are possible by the possessor, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

100: plunger
110: first body part
120: support
130: connection protrusion
132: flat surface
134: slope surface
136: depression
200: plunger
210: second body part
212: hollow
214: pressing unit
220: connection line part
230: guidelines
240: contact tip unit
242, 244: bent portion
246: form part
250: first hook
252: hook head
260: second hook
262: hook groove
300: spring

Claims (11)

In the pogo pin,
Top plunger located at the top;
Bottom plunger located in the lower part; and
A spring located between the top plunger and the bottom plunger to apply elasticity in a direction in which the top plunger and the bottom plunger move away from each other,
The top plunger,
A first body part extending in the vertical direction, a support part protruding in at least one lateral direction of the first body part, and
It is provided on the front surface of the first body and includes a connection protrusion protruding forward,
The bottom plunger,
A second body having a hollow penetrating in the vertical direction, and
A connection line portion formed in the front portion of the second body portion and extending in a vertical direction;
The connecting line part,
At least a portion of the front surface of the second body is composed of a through hole drilled in the front and rear directions,
When the top plunger and the bottom plunger are coupled,
The spring is located between the top plunger and the bottom plunger,
At least a portion of the first body of the top plunger is inserted into the hollow of the bottom plunger;
The connection protrusion is located in the connection line part,
The top plunger and the bottom plunger are relatively displaced by sliding each other in the vertical direction,
The pogo pin is positioned within the connecting line portion to guide relative displacement of the top plunger and the bottom plunger in a vertical direction. According to claim 1,
The first body part,
It is composed of a plate having a predetermined width in the lateral direction and a predetermined thickness in the front-back direction,
The connecting protrusion,
The rear surface of the first body is punched forward,
A pogo pin composed of a three-dimensional part that protrudes forward and sinks backward. According to claim 2,
The connecting protrusion,
Including a flat surface formed on the upper surface,
The flat surface is a pogo pin that is caught on the upper end of the connection line part. According to claim 2,
The connecting protrusion,
Including a slope surface formed on the front,
The slope surface protrudes forward from the bottom to the top, and the width of the pogo pin increases. According to claim 1,
The bottom plunger,
The pogo pin further comprises a guide line formed on a front portion of an inner surface of the hollow, positioned above the connection line portion, and extending in a vertical direction. According to claim 5,
The depth of the guide line in the front-back direction is a pogo pin having a deeper depth than the upper part than the lower part. According to claim 1,
The bottom plunger,
A pogo pin configured in the form of a cannula in which a plate having a predetermined thickness and area is bent so that both side end portions of the plate come into contact with each other and the hollow is formed inside the plate. According to claim 7,
The plate includes a first hook that protrudes in the lateral direction at one end in the lateral direction and protrudes and sinks in the front-back direction;
And a second hook that is recessed laterally at the other end in the lateral direction and protrudes and sinks in the forward and backward directions,
A pogo pin wherein the first hook is inserted into the second hook when the plate is bent. According to claim 1,
The first body portion is interpolated within the spring,
The spring is positioned between the support part and the second body part pogo pin. According to claim 1,
At least a portion of the first body part is in close contact with the inner surface of the second body part. According to claim 1,
The front and rear surfaces of the first body unit are in close contact with the front and rear surfaces of the inner surface of the second body unit, respectively.

Images