Pogo pin with adjustable elastic force

Abstract

To disclose a pogo pin capable of elastic force adjustment according to a contact direction.SOLUTION: A pogo pin capable of elastic force adjustment is provided that includes: a housing; a plunger pin attached to an end portion of the housing so as to directly contact a measurement target; and a spring provided in the housing so as to provide elastic force for the plunger pin to contact the measurement target and in which a local fixing portion protruding inward is formed so that a first position of a spring can be pressed and fixed in one side of the housing.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a pogo pin, and more particularly to a pogo pin capable of adjusting an elastic force according to a contact direction.

Background Art

[0002] Generally, a pogo pin is a component in which a spring is installed inside, and a plunger pin provided on both sides or one side is brought into contact with an object by the elastic force of the spring.

[0003] Generally, a spring probe pin, also known as a pogo pin, is a component widely used in inspection devices such as semiconductor wafers, LCD modules, camera modules, image sensors, and semiconductor packages, as well as various sockets and battery connection parts of mobile phones.

[0004] A conventional pogo pin is disclosed in Patent Document 1. A conventional pogo pin includes an upper connection part, a lower connection part, a spring that applies an elastic force to the upper connection part and the lower connection part, a part of the upper connection part and the lower connection part, and a cylindrical body that houses the spring. A part of the upper connection part and the lower connection part of such a conventional pogo pin is applied to the cylindrical body to prevent detachment from the cylindrical body to the outside, and is configured to receive an elastic force by a spring provided between the upper connection part and the lower connection part. In a conventional pogo pin, the spring serves as a buffer so that the object to be inspected is not damaged, and since the spring must enter the barrel such as the cylindrical body and the housing, it is an inspection instrument that requires miniaturization.

[0005] In the pogo pin according to the prior art, since there is one spring inside and the plunger pins at the upper and lower parts receive the elastic force, the elastic force of the spring is evenly transmitted to the upper and lower plunger pins. Therefore, regardless of the situation of the contact objects at the upper and lower parts, there is a problem that the same elastic force is applied.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The present invention is for solving the above-mentioned problems, and the object of the present invention is to provide a pogo pin capable of adjusting elastic force that can provide different elastic forces to the upper and lower connection parts according to the connection parts of the upper and lower parts and the surrounding environment.

[0008] The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description.

Means for Solving the Problems

[0009] According to one aspect of the present invention, there is provided a pogo pin capable of adjusting elastic force, including a housing, a plunger pin attached to an end of the housing so as to directly contact an object to be measured, and a spring provided inside the housing to provide an elastic force for the plunger pin to contact the object to be measured. A local fixing portion protruding inward is formed on one side of the housing so that the first position of the spring can be pushed and fixed.

[0010] At this time, the plunger pin may be provided at the upper and lower parts of the housing, respectively.

[0011] At this time, the local fixing portion may be formed in the form of at least one or more points at the first position of the housing.

[0012] At this time, when a plurality of the local fixing portions are formed, the first position may be formed at the same height in a direction perpendicular to the longitudinal direction of the housing.

[0013] At this time, at least one or more of the local fixing portions may be linearly formed in a direction perpendicular or parallel to the longitudinal direction at the first position.

[0014] At this time, the local fixing portion may be formed over the entire circumference of the housing in a direction perpendicular to the longitudinal direction at the first position.

[0015] At this time, one or more ineffective turns that cannot provide an elastic force are formed in the spring, and one or more selected from among the ineffective turns may have a local fixing portion formed thereon.

[0016] At this time, by forming the local fixing portion, the elastic force of the plunger pin with respect to the measurement object that is in close contact with the upper and lower portions can be set and adjusted.

[0017] At this time, a stepped portion is formed in the housing of the pogo pin, and the stepped portion can be fixed to a pin fixing member for fixing the pogo pin.

[0018] At this time, it further includes a pin fixing member for fixing the housing of the pogo pin, and the stepped portion where the upper and lower end portions of the housing are located may be formed on the pin fixing member.

[0019] At this time, plunger pins are respectively provided on the upper and lower portions of the pogo pin, and one of the upper and lower pins may be provided in a state of always being pressed by the measurement object.

Advantages of the Invention

[0020] According to the above-described configuration, the pogo pin capable of adjusting the elastic force according to the embodiment of the present invention can adjust the elastic force provided to the upper and lower portions as desired by forming a local fixing portion in the casing and fixing the spring based on that portion.

[0021] Also, in an actual field, when there is a lack of stroke where no force is applied to one side of the pogo pin and only the opposite side has a stroke, there is a problem that the force becomes small. However, the present invention can be set to have a force that matches the desired stroke separately from the stroke on the opposite side. That is, when an additional lower stroke is different from normal, problems occur in the lower contact. Even if a normal stroke is applied from the upper part, problems will also occur in the upper part because the force connected to the lower part is applied. Conversely, even when the stroke applied from the upper part is different, it can be set so that the force applied to the board arranged in the lower part changes.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it. The present invention can be implemented in various different forms and is not limited to the embodiments described in this specification. In order to clearly explain the present invention, parts not related to the description in the drawings are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

[0024] Words and terms used in this specification and the claims are not to be construed in a limited sense in accordance with their ordinary or dictionary meanings, but should be construed as meanings and concepts that conform to the technical idea of the present invention in accordance with the principle that the inventor can define the terms and concepts in order to best explain the present invention.

[0025] Therefore, the embodiments described in this specification and the configurations shown in the drawings correspond to a preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention. Therefore, there may be various equivalents and modifications that replace this at the time of filing the present invention for the corresponding configuration.

[0026] In this specification, terms such as "including" or "having" are intended to describe the presence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude in advance the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0027] When a certain component is "in front of", "behind", "above", or "below" another component, unless there are special circumstances, it not only means that it is directly in contact with the other component and is arranged "in front of", "behind", "above", or "below", but also includes the case where other components are arranged in between. Also, when a certain component is "connected" to another component, unless there are special circumstances, it not only means that they are directly connected to each other, but also includes the case where they are indirectly connected to each other.

[0028] Hereinafter, a pogo pin capable of adjusting elastic force according to a first embodiment of the present invention will be described with reference to the drawings.

[0029] As shown in FIGS. 1 and 2, the pogo pin 10 according to an embodiment of the present invention includes a housing 11, plunger pins 12 and 13, and a spring 20.

[0030] The housing 11 is configured in a cylindrical shape extending along the longitudinal direction, and has a shape in which a part of the upper and lower portions is open with reference to FIG. 1.

[0031] At this time, the housing 11 is generally made of a metal material that conducts electricity, and has a plastic property that maintains its shape when stress is applied from the outside and it bends or sinks. Therefore, when a force is applied to form a local fixing portion as described later, it continues to maintain its shape.

[0032] As shown in FIGS. 1 and 2, the plunger pins 12 and 13 can be attached to the ends of the housing 11 so as to directly contact the objects to be measured 1 and 2.

[0033] At this time, a part of the plunger pins 12 and 13 that is the main body part is hidden inside the housing, and the remaining part, the pin part, is exposed outside. In the case of the main body part, it has a shape, diameter or thickness that can support the end of the internal spring 20, and the pin part has a pointed end shape and contacts the objects to be measured 1 and 2. Of course, the plunger pins 12 and 13 can also be made of a metal material that conducts electricity.

[0034] As shown in FIG. 2, the spring 20 can be installed inside the housing 11 so as to provide an elastic force for the plunger pins 12 and 13 to contact the objects to be measured 1 and 2.

[0035] At this time, a local fixing portion 10a protruding inward can be formed on one side of the housing 11 so that the first position of the spring 20 can be pushed and fixed.

[0036] At this time, the elastic force of the spring 20 can be provided such that the elastic force is different vertically with reference to the first position where the local fixing portion 10a is formed. That is, when the local fixing portion 10a is formed at the center of the intermediate height with reference to FIG. 2, the elastic force of the spring 20 can be provided identically in both the upper and lower portions. When the local fixing portion 10a is formed with the first position below the intermediate height biased downward as shown in FIG. 1, the elastic force is applied greater in the upper portion than in the lower portion with reference to the first position, and a greater elastic force acts on the upper plunger pin 12 than on the lower plunger pin 13.

[0037] At this time, the plunger pins 12 and 13 are respectively provided at the upper and lower portions of the housing 11. When provided only on one side, the local fixing portion 10a can be formed.

[0038] At this time, the local fixing portion 10a can be formed in at least one or more dot-like shapes at the first position of the housing 11. Here, when a plurality of the local fixing portions 10a are formed, the first position can be formed at the same height in a direction perpendicular to the longitudinal direction of the housing 11.

[0039] At this time, as another embodiment, the local fixing portions 10b, 10c, and 10d can be formed in at least one or more linear shapes in a direction perpendicular or parallel to the longitudinal direction at the first position.

[0040] At this time, as another embodiment, the local fixing portion 10c can be formed over the entire circumference of the housing in a direction perpendicular to the longitudinal direction at the first position.

[0041] At this time, as another embodiment, the spring 120 has one or more ineffective turns 120a, 120b, and 120c that cannot provide an elastic force, and a local fixing portion can be formed on one or more selected from among the ineffective turns.

[0042] Referring to FIG. 1, a perspective view of the pogo pin 10 capable of adjusting the elastic force according to the first embodiment of the present invention is shown. Referring to FIG. 2, a longitudinal sectional view of the pogo pin 10 capable of adjusting the elastic force according to the first embodiment of the present invention is shown. In FIG. 1, referring to the drawing, a casing 11 is vertically shown in the center. A plunger pin 12 and a plunger pin 13 are respectively coupled to the upper and lower portions of the casing 11 in a protruding state. At this time, a local fixing portion 10a is formed at a height that is one-third of the casing 11. Referring to FIG. 2, the plunger pins 12 and 13 are provided on the upper and lower portions of the casing 11 so as to receive the elastic force of the spring 20 in the outer direction of the casing 11. At this time, the local fixing portion 10a is recessed in the external state and protruded in the internal state. Therefore, by protruding and entering between the spring 20 bodies at that position, the spring 20 is divided into upper and lower portions based on the first position based on the height at that position. Since the upper portion has more turns of the spring 20 than the lower portion, the elastic force provided to the upper plunger pin 12 acts more strongly than the elastic force provided to the lower plunger pin 13 based on the first position. Of course, conversely, when the first position is formed at a height equal to or higher than the middle height of the casing 11, the elastic force of the lower plunger pin 13 can be strongly provided. At this time, in the case of a normal pogo pin 10, it is often used for semiconductor package inspection, etc. A semiconductor package 1 is arranged on the upper portion, and a substrate 2 is arranged on the lower portion. Usually, a very large number of pogo pins 10 are attached to the probe card of a semiconductor inspection device and are arranged between the substrate and the semiconductor package wafer to inspect the wafer.

[0043] FIG. 3 is a longitudinal sectional view of the pogo pin 10 capable of adjusting the elastic force according to the second embodiment of the present invention. Here, it is a case where two local fixing portions 10a are formed at the same height of the first position at an angle of 180 degrees. In addition to this, it goes without saying that a plurality of local fixing portions 10a can be formed. By forming a plurality of the local fixing portions 10a in a dot shape in this way, the elastic force of the spring 20 can be surely divided into upper and lower portions at the first position.

[0044] Referring to FIG. 4, a perspective view of a part of a pogo pin capable of adjusting elastic force according to another embodiment of the present invention is shown. In the case of (a), the local fixing portion 10b takes a shape in which one is recessed in a straight line, which is substantially the same as the local fixing portion 10a shown in FIGS. 1 and 2, but is formed in a straight line in the horizontal direction with reference to the drawing. Therefore, in terms of the local fixing reliability of the spring 20, it is much higher than the case where the local fixing portion 10a is formed at one point. In the case of (b), it is a case where the local fixing portion 10c is formed in a ring shape around the casing 11 in the direction perpendicular to the longitudinal direction of the casing 11, that is, in the horizontal direction with reference to the drawing. In this case, of course, the spring fixing reliability can be higher than that in the case of (a). However, the stability of stress fatigue must be considered. In the case of (c), it is a case where the local fixing portion 10c is formed in two rows to enhance the reliability compared to the case of (a). In the case of (d), it is a case where two or more, a plurality of local fixing portions 10d are formed in a straight line along the longitudinal direction. Even in the case where the local fixing portion is formed along the vertical direction, that is, the longitudinal direction on the drawing, the elastic force provided to the upper and lower portions can be adjusted identically.

[0045] On the one hand, referring to FIG. 5, a longitudinal sectional view of the pogo pin 10 capable of adjusting the elastic force according to the third embodiment of the present invention is shown. In the present invention, it includes a casing 11, and plunger pins 12 and 13 that receive elastic force from springs 120 at the upper and lower parts of the casing 11. However, in the spring 120, so-called one or more ineffective turns 120a, 120b, 120c that cannot provide elastic force are formed, and one or more selected from the ineffective turns 120a, 120b, 120c may have a local fixing portion formed thereon. At this time, so-called ineffective turns 120a, 120b, 120c where a part of the main body of the spring 120 is in close contact and cannot provide elastic force are formed at specific positions A, B, and C according to the height of the casing 11, so that the spring 120 is formed in advance so as to be divisible into a plurality of parts. Based on this, the operator or user assumes the first position at the positions 120a, 120b, 120c of the ineffective turns desired, and a local fixing portion can be formed at that part. At this time, by shipping the product with the ineffective turns 120a, 120b, 120c part assumed in advance corresponding to the consumer's requirements in this way, various forms of local fixing portions can be formed at the ineffective turns 120a, 120b, 120c part desired by the consumer. When a local fixing portion is formed at the ineffective turns 120a, 120b, 120c part, it is possible to reduce the decrease in elastic force or the change in elastic force different from the prediction compared to the case of forming it at a part other than the ineffective turns 120a, 120b, 120c part of the spring 120.

[0046] On the other hand, referring to FIG. 6, a partial sectional view of the pogo pin 10 capable of adjusting the elastic force according to the fourth embodiment of the present invention is shown. A step portion 111a is formed on the housing 111 of the pogo pin 10, and the step portion 111a can be fixed to the step portion 112a of the pin fixing member 112 for fixing the pogo pin 10. In such a manner, the housing 111 of the pogo pin 10 can be fixed to the pin fixing member 112. At this time, by forming the local fixing portion 10a, the elastic force of the plunger pins 12 and 13 with respect to the measurement objects 1 and 2 in close contact with the upper and lower parts can be set and adjusted.

[0047] On the one hand, referring to FIG. 7, a partial cross-sectional view of the pogo pin 10 capable of adjusting the elastic force according to the fifth embodiment of the present invention is shown. Here, it further includes a pin fixing member 112 for fixing the housing 111 of the pogo pin 10, and a step portion 112a on which the upper and lower end portions of the housing 111 are engaged may be formed on the pin fixing member 112. Also, in the case of (a), the plunger pins 12 and 13 at the upper and lower portions are pushed by the movement of the pin fixing member 112 and the object to be measured. In the case of (b), as a general case, plunger pins 12 and 13 are respectively provided at the upper and lower portions of the pogo pin 10, and one of the upper and lower plunger pins 12 and 13 may be provided in a state of being always pushed by the object to be measured 2. Of course, also at this time, by forming the local fixing portion 10a on the housing 111 of the pogo pin 10, the elastic forces of the plunger pins 12 and 13 with respect to the object to be measured in close contact with the upper and lower portions can be set and adjusted.

[0048] Although the embodiments of the present invention have been described, the idea of the present invention is not limited by the embodiments presented in this specification. Those skilled in the art who understand the idea of the present invention can easily propose other embodiments by adding, changing, deleting, adding, etc. of components within the scope of the same idea, and it can be said that this also falls within the scope of the idea of the present invention.

Explanation of Reference Numerals

[0049] 1: Semiconductor package (object to be measured) 2: Substrate (object to be measured) 10: Pogo pin 10a, 10b, 10c, 10d: Local fixing portion 11: Casing (housing) 12, 13: Plunger pin 20, 120: Spring 120a, 120b, 120c: Number of ineffective turns

Claims

1. A housing, an upper plunger pin attached to the upper part of the housing so as to directly contact the object to be measured, a lower plunger pin attached to the lower part of the housing, a spring provided inside the housing to provide an elastic force for the upper plunger pin and the lower plunger pin to contact the object to be measured, and a local fixing part protruding inward is formed on one side of the housing so that the first position of the spring can be pushed and fixed, the spring includes an upper spring disposed between the local fixing part and the upper plunger pin, and a lower spring disposed between the local fixing part and the lower plunger pin, the length from the local fixing part to the upper plunger pin is longer than the length from the local fixing part to the lower plunger pin, the number of turns of the upper spring is more than the number of turns of the lower spring, the elastic force provided by the upper spring to the upper plunger pin can be adjusted to be greater than the elastic force provided by the lower spring to the lower plunger pin, a pogo pin.

2. The pogo pin according to claim 1, wherein the local fixing part is formed in the form of at least one or more points at the first position of the housing.

3. The pogo pin according to claim 2, wherein when a plurality of the local fixing parts are formed, the first position is formed at the same height in a direction perpendicular to the longitudinal direction of the housing.

4. The pogo pin according to claim 1, wherein the local fixing part is formed in at least one or more linear forms in a direction perpendicular to or parallel to the longitudinal direction at the first position.

5. The pogo pin according to claim 1, wherein the local fixing part is formed over the entire circumference of the housing in a direction perpendicular to the longitudinal direction at the first position.

6. The pogo pin according to claim 1, wherein the spring has one or more ineffective turns that cannot provide an elastic force, and a local fixing part is formed on one or more of the ineffective turns selected therefrom.

7. The pogo pin according to claim 1, wherein by forming the local fixing part, the elastic forces of the upper plunger pin and the lower plunger pin with respect to the object to be measured in close contact with the upper and lower parts are set and adjusted.

8. In the housing of the pogo pin, a stepped portion is formed, and the stepped portion is fixed to a pin fixing member for fixing the pogo pin. The pogo pin according to claim 1, capable of adjusting elastic force.

9. The upper or lower part of the housing is fixed to the fixing part of the pin fixing member. The pogo pin according to claim 1, capable of adjusting elastic force.

10. One of the upper plunger pin and the lower plunger pin is provided in a state of always being pushed by the object to be measured. The pogo pin according to claim 1, capable of adjusting elastic force.

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