Probe pin and socket

Abstract

To achieve a probe pin capable of improving durability while reducing resistance.SOLUTION: A probe pin comprises an elastic portion including at least three elastic pieces, a first contact portion, and a second contact portion. The elastic portion is configured to expand and contract along a first direction. At least three elastic pieces are spaced apart from each other in a width direction intersecting an extending direction in which the elastic portion extends. The elastic portion includes a first curved portion, a second curved portion, and a connection portion. The first curved portion is located on one side with respect to a center line passing through the center of the elastic portion in a second direction and extending in the first direction. The second curved portion is located on the opposite side of the first curved portion with respect to the center line of the elastic portion. The connection portion is located between the first curved portion and the second curved portion in the second direction, and both ends in the width direction are respectively connected to two elastic pieces adjacent to each other in the width direction among at least three elastic pieces. The first curved portion and the second curved portion are alternately located in the first direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to probe pins and sockets. [Background technology]

[0002] Patent Document 1 discloses a probe pin that includes an elastic portion having a through hole, a first contact portion disposed at one end of the elastic portion in the longitudinal direction, and a second contact portion disposed at the other end of the elastic portion in the longitudinal direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-223628 Summary of the Invention [Problem to be solved by the invention]

[0004] The probe pin of Patent Document 1 has room for improvement in terms of reducing resistance and improving durability.

[0005] An object of the present disclosure is to provide a probe pin and a socket that can reduce resistance while improving durability. [Means for solving the problem]

[0006] The probe pin according to one aspect of the present disclosure includes: an elastic portion including at least three elastic pieces and configured to stretch along a first direction; a first contact portion located on one end side of the elastic portion in the first direction; a second contact portion located on the opposite side of the elastic portion from the first contact portion in the first direction; Equipped with the at least three elastic pieces are positioned with gaps between them in a width direction intersecting with the extension direction of the elastic portion, The elastic portion is at least one first curved portion that is located on one side of a center line that passes through a center of the elastic portion in a second direction intersecting the first direction and extends in the first direction, and that protrudes in a direction away from the center line in the second direction; At least one second curved portion located on the opposite side of the first curved portion with respect to the center line of the elastic portion and protruding in the opposite direction to the first curved portion in the second direction; at least one connecting portion located between the first curved portion and the second curved portion in the second direction, the connecting portion having both ends in the width direction connected to two elastic pieces adjacent to each other in the width direction among the at least three elastic pieces; and The first curved portions and the second curved portions are positioned alternately in the first direction.

[0007] A socket according to one aspect of the present disclosure includes: a pair of probe pins; a housing for accommodating the probe pin; Equipped with At least one of the pair of probe pins is the probe pin of the above aspect, When viewed along a third direction intersecting the first direction and the second direction, the pair of probe pins are positioned symmetrically with respect to a second imaginary line extending in the first direction. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to realize a probe pin and a socket that can reduce resistance and improve durability. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a socket having a probe pin according to one embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 2 is a plan view showing the probe pin of FIG. 1; [Figure 4]FIG. 2 is a plan view showing a first modified example of the probe pin of FIG. [Figure 5] FIG. 2 is a plan view showing a second modified example of the probe pin of FIG. [Figure 6] FIG. 2 is a plan view showing a third modified example of the probe pin of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] An example of the present disclosure will be described below with reference to the accompanying drawings. The following description is merely exemplary in nature and does not limit the present disclosure, its applications, or uses. The accompanying drawings are schematic drawings, and the illustrated configurations and actual products may differ in dimensional ratios, etc. In the following description, terms such as "about" or "approximately" mean that the values, shapes, etc. following these terms include an acceptable range of error as determined by a person skilled in the art.

[0011] 1, a probe pin 10 according to an embodiment of the present disclosure constitutes a part of a socket 1. As an example, the socket 1 includes a plurality of pairs of probe pins 10 and a housing 2 that accommodates the plurality of pairs of probe pins 10 in a state in which the probe pins 10 are electrically isolated from each other.

[0012] As shown in FIG. 2, each pair of probe pins 10 includes a first probe pin 11 (an example of a probe pin in the present disclosure) and a second probe pin 12. The first probe pin 11 and the second probe pin 12 are each an elongated thin plate formed, for example, by electroforming using a conductive material, and have substantially the same configuration except for the position of a second contact portion 50 and a connection portion 33, which will be described later. When each pair of probe pins 10 is viewed along the plate thickness direction (e.g., X direction) of the first probe pin 11 and the second probe pin 12, the first probe pin 11 and the second probe pin 12 are positioned symmetrically with respect to an imaginary line L2 (an example of a second imaginary line) extending in a first direction (e.g., Z direction). As shown in FIG. 1, the plurality of pairs of probe pins 10 are housed in the housing 2 so that the first probe pins 11 and the second probe pins 12 are alternately arranged at intervals in the plate thickness direction X in some or all of the pairs of probe pins 10.

[0013] 1, the housing 2 has, as an example, an insulating, substantially rectangular parallelepiped shape and includes a housing body 21 and a lid portion 22, but is not limited to this. The housing 2 may have any configuration that can accommodate the probe pins 10.

[0014] As shown in FIG. 2 , the housing main body 21 has a recessed accommodating portion 23 provided therein for accommodating the probe pin 10, a first opening 24 provided at one end in the first direction Z, and a second opening 25 provided at the other end in the first direction Z. When viewed along the plate thickness direction X, the accommodating portion 23 has a generally rectangular shape with the first direction Z as its longitudinal direction. The first opening 24 and the second opening 25 are connected to the accommodating portion 23. A first contact portion 40 (described later) of the probe pin 10 is located in the first opening 24. The second opening 25 is configured to be able to accommodate the entire probe pin 10 from the first direction Z.

[0015] The lid portion 22 is attached to the end of the housing body 21 on the second opening 25 side by, for example, a fastening member 3 (see FIG. 1 ) to cover the second opening 25. The lid portion 22 has a third opening 26 and a fourth opening 27 provided in a portion facing the second opening 25 when attached to the housing body 21. The third opening 26 is configured to accommodate the second contact portion 50 of the first probe pin 11, and is located at a different position from the first opening 24 in a second direction (e.g., the Y direction) intersecting the first direction Z when the lid portion 22 is attached to the housing body 21. The fourth opening 27 is configured to accommodate the second contact portion 50 of the second probe pin 12, and is located at approximately the same position as the first opening 24 in the second direction Y when the lid portion 22 is attached to the housing body 21. In the pair of probe pins 10, the first contact portion 40 of the first probe pin 11 is located between the second contact portion 50 of the first probe pin 11 and the second contact portion 50 of the second probe pin 12 in the second direction Y.

[0016] 2 , the first probe pin 11 includes an elastic portion 30 that expands and contracts along the first direction Z, a first contact portion 40 located on one end side of the elastic portion 30 in the first direction Z, and a second contact portion 50 located on the opposite side of the elastic portion 30 from the first contact portion 40 in the first direction Z. Of both ends of the first contact portion 40 in the first direction Z, a tip portion 41 that is the end farther from the elastic portion 30 is located outside the housing 2. Of both ends of the second contact portion 50 in the first direction Z, a tip portion 51 that is the end farther from the elastic portion 30 is located outside the housing 2.

[0017] 3, the elastic portion 30 has a shape including a substantial S-shape when viewed in a third direction (e.g., plate thickness direction X) intersecting the first direction Z and the second direction Y, and includes at least three elastic pieces 300. The at least three elastic pieces 300 are positioned with gaps 310 between them in the width direction intersecting the extension direction in which the elastic portion 30 extends (e.g., the first direction Z and a direction following the shape of the elastic portion 30). In this embodiment, the elastic portion 30 includes six elastic pieces 300.

[0018] As shown in FIG. 3 , the elastic portion 30 includes at least one first curved portion 31, at least one second curved portion 32, and at least one connecting portion 33 connecting two adjacent elastic pieces 300. The first curved portions 31 and the second curved portions 32 are positioned alternately in the first direction Z. In this embodiment, the elastic portion 30 includes two first curved portions 31, one second curved portion 32, and four connecting portions 33. The two first curved portions 31 are positioned with an interval in the first direction Z. The second curved portion 32 is positioned between the two first curved portions 31 in the first direction Z. The first curved portions 31 and the second curved portions 32 that are adjacent in the first direction Z are connected.

[0019] Each first curved portion 31 is located on one side of a center line CL that passes through the center of the elastic portion 30 in the second direction Y and extends in the first direction Z, and protrudes in a direction away from the center line CL in the second direction Y. Of the multiple first curved portions 31, the first curved portion 31 located at one end in the first direction Z is connected to the first contact portion 40, and the first curved portion 31 located at the other end in the first direction Z is connected to the second contact portion 50.

[0020] In the first bending portion 31, the elastic piece 300 that is furthest from the center line CL in the second direction Y is referred to as elastic piece 301. In the first bending portion 31, the elastic piece 300 that is second furthest from the center line CL in the second direction Y is referred to as elastic piece 302 (an example of a first elastic piece). In the first bending portion 31, the elastic piece 300 that is third furthest from the center line CL in the second direction Y is referred to as elastic piece 303 (an example of a second elastic piece). In the first bending portion 31, the elastic piece 300 that is fourth furthest from the center line CL in the second direction Y is referred to as elastic piece 304 (an example of a third elastic piece). In the first bending portion 31, the elastic piece 300 that is fifth furthest from the center line CL in the second direction Y is referred to as elastic piece 305. In the first bending portion 31, the elastic piece 300 that is sixth furthest from the center line CL in the second direction Y (i.e., closest to the center line CL in the second direction Y) is referred to as elastic piece 306. In each first curved portion 31, the radius of curvature of the elastic piece 301 is the largest, and the radius of curvature of the elastic piece 306 is the smallest.

[0021] The second curved portion 32 is located on the opposite side of the first curved portion 31 with respect to the center line CL of the elastic portion 30, and protrudes in the opposite direction to the first curved portion 31 in the second direction Y. In the second curved portion 32, the radius of curvature of the elastic piece 306 is the largest, and the radius of curvature of the elastic piece 301 is the smallest.

[0022] Each connection portion 33 is located between the first curved portion 31 and the second curved portion 32 in the second direction Y, and both ends in the width direction are connected to two elastic pieces 300 adjacent in the width direction out of the at least three elastic pieces 300. The connection portion 33 connected to the elastic pieces 301 and 302 is referred to as connection portion 331. The connection portion 33 connected to the elastic pieces 302 and 303 is referred to as connection portion 332 (an example of a first connection portion). The connection portion 33 connected to the elastic pieces 303 and 304 is referred to as connection portion 333 (an example of a second connection portion). The connection portion 33 connected to the elastic pieces 304 and 305 is referred to as connection portion 334.

[0023] In this embodiment, the connecting portions 331 to 334 are located in a first non-bending portion 341 that connects the first bending portion 31 and the second bending portion 32, which are located near the first contact portion 40 in the first direction Z. The first non-bending portion 341 extends linearly along the second direction Y, for example. The connecting portions 331 and 332 are located at approximately the same position in the second direction Y. The connecting portions 333 and 334 are located at approximately the same position in the second direction Y. The connecting portions 331 and 332 and the connecting portions 333 and 334 are located at different positions in the second direction Y. For example, the connecting portions 331 and 332 are located closer to the first bending portion 31 than the center line CL in the second direction Y, and the connecting portions 333 and 334 are located on the center line CL.

[0024] The first probe pin 11 has an elastic portion 30 in which the number of first bending portions 31 is greater than the number of second bending portions 32. In this embodiment, the connecting portions 331 to 334 connect two adjacent elastic pieces 300 of the elastic pieces 301 to 306, excluding the elastic piece 306 that is closest to the center line CL in the first bending portion 31. In other words, none of the connecting portions 331 to 334 is connected to the elastic piece 306. The elastic piece 306 has the largest number of portions with the smallest radius of curvature among the elastic pieces 301 to 306.

[0025] 3, the elastic portion 30 includes a second non-curved portion 342 and a third non-curved portion 343 that each extend linearly along the second direction Y. The second non-curved portion 342 connects the first curved portion 31 located near the first contact portion 40 to the first contact portion 40. The third non-curved portion 343 connects the second curved portion 32 to the first curved portion 31 located near the second contact portion 50.

[0026] As shown in FIG. 3, an imaginary line L1 (an example of a first imaginary line) connects the first ends 320 of the elastic pieces 301-306 that are closer to the first contact point 40 than the other ends in the extension direction. The imaginary line L1 of the elastic pieces 301-306 is inclined with respect to the center line CL. Of the ends of at least three elastic pieces 300 in the extension direction, the first end 320 of the elastic piece 300 (elastic piece 306 in this embodiment) that is closest to the center line CL in the first bending portion 31 is the furthest in the second direction Y from a portion 311 of the first bending portion 31 that is the furthest from the center line CL. The portion 311 constitutes, for example, the vertex of the first bending portion 31.

[0027] In this embodiment, the imaginary line L2 connecting the second ends 330 of the elastic pieces 301 to 306 that are closer to the second contact point 50 in the extension direction is also inclined with respect to the center line CL. The second end 330 of the elastic piece 306 is farthest in the second direction Y from the part 311 of the first curved portion 31 that is farthest from the center line CL. The first end 320 of the elastic pieces 301 to 306 is located between the first curved portion 31 and the second curved portion 32 in the second direction Y and closer to the second curved portion 32 in the second direction Y than the center line CL. The imaginary line L1 of the first end 320 is inclined with respect to the center line CL so as to move away from the center line CL in the second direction Y as it approaches the second contact point 50 in the first direction Z. The second end 330 of each of the elastic pieces 301-306 is located between the first curved portion 31 and the second curved portion 32 in the second direction Y and closer to the first curved portion 31 in the second direction Y than the center line CL. The imaginary straight line L1 of the second end 330 is inclined with respect to the center line CL so as to approach the center line CL in the second direction Y as it approaches the first contact point 40 in the first direction Z.

[0028] As shown in FIG. 3 , the first contact portion 40 has a substantially rectangular shape extending along the first direction Z. The tip portion 41 of the first contact portion 40 has a shape that allows it to contact, for example, a terminal of an inspection device or the shape of an object to be inspected. The first contact portion 40 is located on the same side as the second curved portion 32 with respect to the center line CL in the second direction Y. Of the two ends of the first contact portion 40 in the first direction Z, the base end 42 closer to the elastic portion 30 is connected to a second non-bent portion 342 from the second direction Y. A support portion 43 is provided between the tip portion 41 and the base end 42 of the first contact portion 40, adjacent to the second non-bent portion 342 in the first direction Z. The support portion 43 extends from the first contact portion 40 in the second direction Y toward the center line CL and is configured to contact an inner surface 231 that constitutes the accommodation portion 23 of the housing main body 21 when the first probe pin 11 is accommodated in the housing 2, as shown in FIG. 2 .

[0029] As shown in FIG. 3 , the second contact portion 50 has a first portion 501 extending from the first curved portion 31 of the elastic portion 30 in the first direction Z and a second portion 502 extending from the first curved portion 31 in the second direction Y. The first portion 501 is located on the same side as the first curved portion 31 with respect to the center line CL in the second direction Y. Of the two ends of the first portion 501 in the first direction Z, the end farther from the first curved portion 31 constitutes the tip portion 51 of the second contact portion 50. The tip portion 51 of the second contact portion 50 has a shape that can contact, for example, a terminal of an inspection device or the shape of an object to be inspected. The second portion 502 has a substantially rectangular plate shape and extends from the first curved portion 31 to the second curved portion 32 in the second direction Y. As shown in FIG. 2 , the second portion 502 is configured to contact the inner surface 232 that constitutes the accommodation portion 23 of the cover portion 22 when the first probe pin 11 is accommodated in the housing 2. Of both ends of the second portion 502 in the second direction Y, a convex portion 503 is provided at the end farther from the first curved portion 31. The convex portion 503 protrudes from the second portion 502 in the second direction Y and in a direction away from the first curved portion 31.

[0030] As described above, the second probe pin 12 has substantially the same configuration as the first probe pin 11 except for the position of the second contact portion 50 and the connecting portion 33. As shown in FIG. 2, in the first probe pin 11, the center line CL is located between the first contact portion 40 and the second contact portion 50 in the second direction Y. In the second probe pin 12, the first contact portion 40 and the second contact portion 50 are located on the same side of the center line CL in the second direction Y. In the second probe pin 12, the connecting portion 33 includes a connecting portion 331 connecting the elastic pieces 301 and 302, a connecting portion 332 connecting the elastic pieces 302 and 303, a connecting portion 333 connecting the elastic pieces 303 and 304, a connecting portion 334 connecting the elastic pieces 304 and 305, and a connecting portion 335 connecting the elastic pieces 305 and 306. All of the connecting portions 331 to 335 are located on the center line CL.

[0031] The first probe pin 11 can provide the following effects.

[0032] The first probe pin 11 includes an elastic portion 30, a first contact portion 40, and a second contact portion 50. The elastic portion 30 includes at least three elastic pieces 300 and is configured to expand and contract along the first direction Z. The at least three elastic pieces 300 are positioned with a gap 310 between them in the width direction. The elastic portion 30 has at least one first curved portion 31, at least one second curved portion 32, and at least one connecting portion 33. The first curved portion 31 is located on one side of the center line CL of the elastic portion 30 and protrudes in a direction away from the center line CL in the second direction Y. The second curved portion 32 is located on the opposite side of the first curved portion 31 with respect to the center line CL of the elastic portion 30 and protrudes in the opposite direction from the first curved portion 31 in the second direction Y. The connecting portion 33 is located between the first curved portion 31 and the second curved portion 32 in the second direction Y, and both ends in the width direction are connected to two of the at least three elastic pieces 300 that are adjacent in the width direction. The first curved portions 31 and the second curved portions 32 are alternately located in the first direction Z. By including multiple elastic pieces 300 in the elastic portion 30, the resistance of the elastic portion 30 can be reduced while reducing the plate thickness of the first probe pin 11. By connecting two of the at least three elastic pieces 300 that are adjacent in the width direction with the connecting portion 33, the balance of the stress applied to the elastic portion 30 can be adjusted. As a result, a probe pin that can reduce resistance and improve durability can be realized.

[0033] When the elastic member 30 includes a plurality of first curved portions 31 and the number of first curved portions 31 is greater than the number of second curved portions 32, the connecting portion 33 connects two of the at least three elastic pieces 300, excluding the elastic piece 300 closest to the center line CL in the first curved portion 31. With this configuration, the connecting portion 33 is not connected to the elastic piece 300 that is subjected to the highest stress, so the balance of stress applied to the elastic portion 30 can be adjusted more reliably.

[0034] Of the multiple first curved portions 31, the first curved portion 31 located at one end in the first direction Z is connected to the first contact portion 40. Of the two ends in the extension direction of at least three elastic pieces 300, an imaginary straight line L1 connecting the first end portions 320 closest to the first contact portion 40 is inclined with respect to the center line CL. The first end 320 of the elastic piece 300 located closest to the center line CL in the first curved portion 31 is furthest in the second direction Y from the part of the first curved portion 31 furthest from the center line CL. By configuring in this manner, the balance of stress applied to the elastic portion 30 can be adjusted more reliably.

[0035] At least one connection portion 33 includes a connection portion 332 having both ends in the width direction connected to the elastic piece 302 and the elastic piece 303, respectively, and a connection portion 333 having both ends in the width direction connected to the elastic piece 303 and the elastic piece 304, respectively. The connection portion 332 and the connection portion 333 are located at different positions in the second direction Y. With this configuration, the balance of the stress applied to the elastic portion 30 can be adjusted more reliably.

[0036] When viewed along the third direction X, the center line CL is located between the first contact portion 40 and the second contact portion 50 in the second direction Y. With this configuration, it is possible to more reliably realize a probe pin that can reduce resistance and improve durability.

[0037] The socket 1 includes at least a pair of probe pins 10 and a housing 2 that accommodates the probe pins 10. At least one of the pair of probe pins 10 is a first probe pin 11, and the pair of probe pins 10 are positioned symmetrically with respect to an imaginary line L2 when viewed along the third direction X. With this configuration, it is possible to realize a socket 1 that can reduce resistance and improve durability.

[0038] The first probe pin 11 can be configured as follows.

[0039] The elastic portion 30 may have at least one first bending portion 31 and at least one second bending portion 32. For example, suppose the elastic portion 30 includes at least four elastic pieces 300, and the number of first bending portions 31 is the same as the number of second bending portions 32. In this case, the connection portion 33 is connected to two adjacent elastic pieces 300, excluding the elastic piece 300 closest to the center line CL and the elastic piece 300 farthest from the center line CL in the first bending portion 31. In this manner, the number of first bending portions 31 and second bending portions 32 can be changed depending on the configuration of the object with which the first probe pin 11 comes into contact. The number of first bending portions 31 and second bending portions 32 may be the same, or the number of first bending portions 31 may be one more than the number of second bending portions 32.

[0040] The elastic portion 30 may include three or more elastic pieces 300. Fig. 4 shows an example of a first probe pin 11 having an elastic portion 30 including three elastic pieces 300 (elastic pieces 301, 302, 303). In the first probe pin 11 shown in Fig. 4, the tip portion 41 of the first contact portion 40 has a shape different from the tip portion 41 of the first probe pin 11 shown in Fig. 3.

[0041] FIGS. 5 and 6 show modified examples of the first probe pin 11. In the first probe pin 11 shown in FIG. 5, the tip 41 of the first contact portion 40 has a different shape from the tip 41 of the first contact portion 40 of the first probe pin 11 shown in FIGS. 3 and 4. The tip 51 of the second contact portion 50 has a different shape from the tip 51 of the second contact portion 50 of the first probe pin 11 shown in FIGS. 3 and 4. The shapes of the tip 41 of the first contact portion 40 and the tip 51 of the second contact portion 50 can be changed as desired. In the first probe pin 11 shown in FIG. 6, the connecting portions 331 to 334 are all located on the center line CL. The first connecting portion and the second connecting portion are not limited to being located at different positions in the second direction Y, and may be located at the same position in the second direction Y.

[0042] The widthwise dimensions of the elastic pieces 301 to 306 may all be the same or may be different.

[0043] The elastic pieces 301 to 306 and the gap 310 may or may not have a constant width dimension in the extending direction.

[0044] The elastic portion 30 may have at least one connection portion 33. For example, in the first probe pin 11 shown in Fig. 4, the elastic portion 30 has one connection portion 33. In the second probe pin 12 shown in Fig. 2, the elastic portion 30 has five connection portions 331 to 335.

[0045] The connecting portion 33 is not limited to being located in the first non-bending portion 341 , but may also be located in the second non-bending portion 342 or the third non-bending portion 343 .

[0046] The imaginary straight lines L1 and L2 may not be inclined with respect to the center line CL, or only the imaginary straight line L1 or only the imaginary straight line L2 may be inclined with respect to the center line CL.

[0047] Various aspects of the disclosure are described below with reference to accompanying reference numerals.

[0048] The probe pin of the first aspect of the present disclosure includes: an elastic portion 30 including at least three elastic pieces 300 and configured to stretch along a first direction; a first contact portion 40 located on one end side of the elastic portion 30 in the first direction; a second contact portion 50 located on the opposite side of the elastic portion 30 from the first contact portion 40 in the first direction; Equipped with the at least three elastic pieces 300 are positioned with gaps 310 between them in a width direction intersecting with the extension direction of the elastic portion 30; The elastic portion 30 is at least one first curved portion 31 that is located on one side of a center line CL that passes through a center of the elastic portion 30 in a second direction intersecting the first direction and extends in the first direction, and that protrudes in a direction away from the center line CL in the second direction; At least one second curved portion 32 is located on the opposite side of the elastic portion 30 from the first curved portion 31 with respect to the center line CL, and protrudes in the opposite direction from the first curved portion 31 in the second direction; at least one connecting portion 33 located between the first curved portion 31 and the second curved portion 32 in the second direction, and having both ends in the width direction connected to two adjacent elastic pieces 300 of the at least three elastic pieces 300 in the width direction; and The first curved portions 31 and the second curved portions 32 are positioned alternately in the first direction.

[0049] A probe pin according to a second aspect of the present disclosure is the probe pin according to the first aspect, When the elastic member includes a plurality of the first curved portions 31 and the number of the first curved portions 31 is greater than the number of the second curved portions 32, the at least one connecting portion 33 is connected to two of the at least three elastic pieces 300, excluding the elastic piece 300 closest to the center line CL in the first curved portion 31.

[0050] A probe pin according to a third aspect of the present disclosure is the probe pin according to the second aspect, Among the plurality of first curved portions 31, the first curved portion 31 located at one end in the first direction is connected to the first contact portion 40, a first imaginary line connecting first ends 320 of the at least three elastic pieces 300 that are closer to the first contact portion 40 to each other is inclined with respect to the center line CL; The first end 320 of the elastic piece 300, which is located closest to the center line CL in the first curved portion 31, is the farthest in the second direction from the part of the first curved portion 31 that is farthest from the center line CL.

[0051] A probe pin according to a fourth aspect of the present disclosure is the probe pin according to the first aspect, The at least three elastic pieces 300 include at least four elastic pieces 300, When the number of the first curved portions 31 and the number of the second curved portions 32 are the same, the at least one connecting portion 33 is connected to two adjacent elastic pieces 300 out of the at least four elastic pieces 300, excluding the elastic piece 300 closest to the center line CL in the first curved portion 31 and the elastic piece 300 farthest from the center line CL.

[0052] A probe pin according to a fifth aspect of the present disclosure is the probe pin according to any one of the first to fourth aspects, The at least three elastic pieces 300 include at least four elastic pieces 300, the at least four elastic pieces 300 include a first elastic piece, a second elastic piece adjacent to the first elastic piece in the width direction, and a third elastic piece adjacent to the second elastic piece in the width direction and located on the opposite side of the first elastic piece in the width direction with respect to the second elastic piece, the at least one connection portion 33 includes a first connection portion having both ends in the width direction connected to the first elastic piece and the second elastic piece, and a second connection portion having both ends in the width direction connected to the second elastic piece and the third elastic piece, The first connection portion and the second connection portion are located at different positions in the second direction.

[0053] A probe pin according to a sixth aspect of the present disclosure is the probe pin according to any one of the first to fifth aspects, When viewed along a third direction that intersects the first direction and the second direction, the center line CL is located between the first contact portion 40 and the second contact portion 50 in the second direction.

[0054] The socket 1 according to the seventh aspect of the present disclosure is At least one pair of probe pins 10; a housing for accommodating the probe pin 10; Equipped with At least one of the pair of probe pins 10 is the probe pin according to any one of the first to sixth aspects, When viewed along a third direction intersecting the first and second directions, the pair of probe pins 10 are positioned symmetrically with respect to a second imaginary line extending in the first direction.

[0055] The embodiments and modifications of the present disclosure can be combined with each other, or with modifications, or with each other. Features included in the embodiments and modifications of the present disclosure can also be combined with each other.

[0056] The disclosure of the present disclosure may vary in structural details, and changes in the combination and order of elements in each embodiment may be made without departing from the scope and spirit of the claimed disclosure. [Industrial Applicability]

[0057] The probe pin and socket of the present disclosure can be applied to an inspection jig for a module mounted with a connector such as a display. [Explanation of symbols]

[0058] 1 socket 2. Housing 3 Fastening members 10 probe pins 11 First probe pin 12 Second probe pin 21 Housing body 22 Lid 23 Storage unit 231, 232 inner surface 24 First Opening 25 Second opening 26 Third Opening 27 Fourth Opening 30 Elastic part 300, 301, 302, 303, 304, 305, 306 Elastic pieces 341 First non-curved section 342 Second non-curved section 343 Third non-curved section 310 Gap 320 First end 330 Second end 31 First curved section 32 Second curved section 33, 331, 332, 333, 334, 335 Connections 40 First contact part 41 Tip 42 Proximal end 43 Support part 50 Second contact part 501 Part 1 502 Part 2 503 Convex part 51 Tip

Claims

1. an elastic portion including at least three elastic pieces and configured to stretch along a first direction; a first contact portion located on one end side of the elastic portion in the first direction; a second contact portion located on the opposite side of the elastic portion from the first contact portion in the first direction; Equipped with the at least three elastic pieces are positioned with gaps between them in a width direction intersecting with the extension direction of the elastic portion, The elastic portion is at least one first curved portion located on one side of a center line that passes through a center of the elastic portion in a second direction intersecting the first direction and extends in the first direction, and protruding in a direction away from the center line in the second direction; at least one second curved portion located on an opposite side of the first curved portion with respect to the center line of the elastic portion and protruding in an opposite direction to the first curved portion in the second direction; at least one connecting portion located between the first curved portion and the second curved portion in the second direction, the connecting portion having both ends in the width direction connected to two elastic pieces adjacent to each other in the width direction among the at least three elastic pieces; and The probe pin, wherein the first curved portions and the second curved portions are positioned alternately in the first direction.

2. 2. The probe pin according to claim 1, wherein the probe pin includes a plurality of the first curved portions, and when the number of the first curved portions is greater than the number of the second curved portions, the at least one connection portion is connected to two of the at least three elastic pieces excluding an elastic piece that is closest to the center line in the first curved portion.

3. Among the plurality of first curved portions, the first curved portion located at one end in the first direction is connected to the first contact portion, a first imaginary line connecting first ends of the at least three elastic pieces that are closer to the first contact point among both ends in the extension direction of the at least three elastic pieces is inclined with respect to the center line; 3. The probe pin according to claim 2, wherein the first end of the elastic piece located closest to the center line in the first curved portion is farthest in the second direction from a portion of the first curved portion connected to the first contact portion that is farthest from the center line.

4. the at least three elastic pieces include at least four elastic pieces; 2. The probe pin according to claim 1, wherein, when the number of the first curved portions is the same as the number of the second curved portions, the at least one connection portion is connected to two adjacent elastic pieces among the at least four elastic pieces, excluding the elastic piece closest to the center line and the elastic piece farthest from the center line in the first curved portion.

5. the at least three elastic pieces include at least four elastic pieces; the at least four elastic pieces include a first elastic piece, a second elastic piece adjacent to the first elastic piece in the width direction, and a third elastic piece adjacent to the second elastic piece in the width direction and located on the opposite side of the first elastic piece in the width direction with respect to the second elastic piece, the at least one connection portion includes a first connection portion having both ends in the width direction connected to the first elastic piece and the second elastic piece, respectively, and a second connection portion having both ends in the width direction connected to the second elastic piece and the third elastic piece, respectively, 5. The probe pin according to claim 1, wherein the first connection portion and the second connection portion are located at different positions in the second direction.

6. 5. The probe pin according to claim 1, wherein, when viewed along a third direction intersecting the first direction and the second direction, the center line is located between the first contact portion and the second contact portion in the second direction.

7. at least one pair of probe pins; a housing for accommodating the probe pin; Equipped with At least one of the pair of probe pins is the probe pin according to any one of claims 1 to 4, When viewed along a third direction intersecting the first direction and the second direction, the pair of probe pins are positioned symmetrically with respect to a second imaginary line extending in the first direction.

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