Probe pin and socket
The probe pin design with alternating, inclined curved portions and a supported support structure addresses durability issues, enhancing reliability through stress management.
Patent Information
- Application Number
- JP2024101446
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2026-01-13
AI Technical Summary
The durability of existing probe pins is inadequate.
A probe pin design featuring a first and second contact portion spaced apart in a first direction, with a support portion and elastic portion connecting them, including multiple first and second curved portions that alternate and are inclined relative to a center line, and a support portion supported by a housing, to manage stress balance.
This configuration enhances the durability of the probe pin and the socket by adjusting stress balance and restricting movement, leading to improved reliability.
Smart Images
Figure 2026003476000001_ABST
Abstract
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 a plate-shaped first contact portion, a plate-shaped second contact portion, an intermediate portion disposed between the first contact portion and the second contact portion, a first elastic portion connected to the first contact portion and the intermediate portion, and a second elastic portion connected to the intermediate portion and the second contact portion. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Re-tabled publication 2019 / 138507 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 durability.
[0005] An object of the present disclosure is to provide a probe pin and a socket that can improve durability. [Means for solving the problem]
[0006] The probe pin according to one aspect of the present disclosure includes: a first contact portion and a second contact portion spaced apart in a first direction; a support portion located between the first contact portion and the second contact portion in the first direction and extending in a second direction intersecting the first direction; an elastic portion connected to the first contact portion and the support portion and configured to expand and contract along the first direction; Equipped with The elastic portion is a plurality of first curved portions that are located on one side of a center line that passes through a center in the second direction of the support portion and extends in the first direction, and that protrude 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 and protruding in an opposite direction to the first curved portion in the second direction; Including, the first curved portions and the second curved portions are alternately positioned in the first direction, A first virtual line connecting the points farthest from the center line in the second direction of two of the first curved portions adjacent to each other in the first direction is inclined with respect to the center line.
[0007] A socket according to one aspect of the present disclosure includes: The probe pin of the above aspect; a housing for accommodating the probe pin; Equipped with The dimension of the elastic portion in the second direction is smaller than the dimension of the support portion in the second direction, The support portion is supported by the housing. [Effects of the Invention]
[0008] According to the present disclosure, it is possible to realize a probe pin and a socket that can 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. 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] As shown in Fig. 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 probe pins 10 and a housing 2 that houses the plurality of probe pins 10 in a state in which the probe pins 10 are electrically isolated from one another. As shown in Fig. 2, each of the probe pins 10 has a substantially identical configuration and is in the form of a thin, elongated plate formed by any processing method, including electroforming and press working, using a conductive material.
[0012] As shown in FIG. 1, the housing 2 includes, for example, an insulating housing body 21 and a lid portion 22.
[0013] As shown in FIG. 2, the housing main body 21 has an accommodating section 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. As shown in FIG. 1, the accommodating section 23 is configured to be able to accommodate one probe pin 10, or to accommodate three probe pins 10 arranged in contact with each other along the plate thickness direction (e.g., the Y direction). The accommodating section 23 has a substantially rectangular shape when viewed along the plate thickness direction Y. The first opening 24 and the second opening 25 are connected to the accommodating section 23. The first opening 24 is configured to be able to accommodate a first contact portion 40 of the probe pin 10, which will be described later. The second opening 25 is configured to be able to accommodate the probe pin 10 from the longitudinal direction of the accommodating section 23 (e.g., the Z direction (hereinafter referred to as the first direction Z)).
[0014] The housing body 21 has a through hole 27 provided in a side surface 211 in the thickness direction Y of the probe pin 10 accommodated in the accommodation portion 23. The through hole 27 penetrates the side surface 211 of the housing body 21 along the thickness direction Y of the probe pin 10 accommodated in the accommodation portion 23.
[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 ), and covers the second opening 25. The lid portion 22 has a third opening 26 provided in a portion facing the second opening 25 when attached to the housing body 21. The third opening 26 is configured to be able to accommodate a second contact portion 50 (described later) of the probe pin 10. When the lid portion 22 is attached to the housing body 21, the third opening 26 is located at a position overlapping with the first opening 24 when viewed along the first direction Z.
[0016] As shown in FIG. 3 , the probe pin 10 includes an elastic portion 30, a first contact portion 40, a second contact portion 50, and a support portion 60. The first contact portion 40 and the second contact portion 50 are spaced apart in the first direction Z. The support portion 60 is located between the first contact portion 40 and the second contact portion 50 in the first direction Z and extends in a second direction (e.g., the X direction) that intersects (e.g., is perpendicular to) the first direction Z. The elastic portion 30 is connected to the first contact portion 40 and the support portion 60 and is configured to expand and contract along the first direction Z. As shown in FIG. 2 , of both ends of the first contact portion 40 in the first direction Z, a tip portion 41, which 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, which is the end farther from the elastic portion 30, is located outside the housing 2.
[0017] As shown in FIG. 3 , the elastic portion 30 has a shape that includes a substantial S-shape when viewed in a third direction (e.g., plate thickness direction Y) that intersects (e.g., is perpendicular to) the first direction Z and the second direction X. The elastic portion 30 includes a plurality of first curved portions 31 and at least one second curved portion 32. In this embodiment, the elastic portion 30 includes three first curved portions 31 and two second curved portions 32. The three first curved portions 31 are positioned at intervals in the first direction Z. Each second curved portion 32 is positioned between two first curved portions 31 that are adjacent in the first direction Z. In other words, the first curved portions 31 and the second curved portions 32 are positioned alternately in the first direction Z.
[0018] Each first curved portion 31 is located on one side of a center line CL that passes through the center of the support portion 60 in the second direction X and extends in the first direction Z, and protrudes in a direction away from the center line CL in the second direction X. In this embodiment, each first curved portion 31 is located on the opposite side of the center line CL from the first contact portion 40 and the second contact portion 50. Of the three first curved portions 31, the first curved portion 31 closest to the first contact portion 40 in the first direction Z is referred to as curved portion 311, the second closest first curved portion is referred to as curved portion 312, and the first curved portion 313 closest to the second contact portion 50. When viewed in the third direction Y, the curved portions 311 and 312 have a substantially semicircular shape, and the curved portion 313 has a substantially quarter-circular sector shape. One end of the curved portion 311 in the extension direction of the elastic portion 30 (in other words, the direction along the shape of the elastic portion 30) is connected to the support portion 60. The other end of the curved portion 311 in the extending direction of the elastic portion 30 is connected to a second curved portion 32 located near the second contact portion 50 in the first direction Z.
[0019] Let the point farthest from the center line CL in the second direction X of the first bending portion 31 be "P1". The first distance between the center line CL and the point P1 in the second direction X increases as it moves away from the first contact portion 40 in the first direction Z. If the first distance of the bending portion 311 is "W1", the first distance of the bending portion 312 is "W2", and the first distance of the bending portion 313 is "W3", then they have the relationship of "W1 < W2 < W3". Among the three first bending portions 31, if the virtual straight line connecting the points P1 of the bending portions adjacent in the first direction Z (for example, the bending portions 311 and 312) is the first virtual straight line L1, the first virtual straight line L1 is inclined with respect to the center line CL.
[0020] Each second bending portion 32 is located on the opposite side of the first bending portion 31 with respect to the center line CL and protrudes in the opposite direction to the first bending portion 31 in the second direction X. Let the point farthest from the center line CL in the second direction X of the second bending portion 32 be "P2". In this embodiment, the second distance between the center line CL and the point P2 in the second direction X is substantially the same for all the second bending portions 32.
[0021] In this embodiment, the elastic portion 30 includes a plurality of elastic pieces (in the main body, two elastic pieces 301 and 302) and at least one connecting portion 33 (in this embodiment, five connecting portions 33). The two elastic pieces 301 and 302 are positioned with a gap 310 therebetween in the width direction that intersects (for example, is orthogonal to) the extending direction of the elastic portion 30. Each connecting portion 33 is connected to two adjacent elastic pieces in the width direction (in this embodiment, the elastic pieces 301 and 302) at both ends in the width direction. Each connecting portion 33 is located between the first bending portion 31 and the second bending portion 32 in the second direction X. In this embodiment, each connecting portion 33 is adjacent to the center line CL and extends substantially parallel to the center line CL. The five connecting portions 33 are located at positions where the distances from the center line CL in the second direction X are substantially the same.
[0022] In this embodiment, the elastic portion 30 includes a first portion 34 that is a portion between the first contact portion 40 and the connection portion 33 that is closest to the first contact portion 40, and a second portion 35 that is a portion other than the first portion 34. The elastic portion 30 is configured so that the width dimension of the first portion 34 (for example, the width dimension W3 of the first portion 34 of the elastic piece 301) is larger than the width dimension of the second portion 35 (for example, the width dimension W4 of the second portion 35 of the elastic piece 301).
[0023] As shown in FIG. 3, the elastic portion 30 includes a plurality of non-bent portions 36 (five non-bent portions 36 in this embodiment) each extending linearly along the second direction X. The non-bent portion 36 located closest to the first contact portion 40 in the first direction Z has one end in the second direction X connected to the bent portion 311 and the other end in the second direction X connected to the first contact portion 40. As shown in FIG. 2, when the probe pin 10 is housed in the housing portion 23, the non-bent portion 36 located closest to the first contact portion 40 in the first direction Z (for example, the non-bent portion 361) comes into contact with the inner surface 212 of the housing main body 21 that constitutes the housing portion 23. The non-bent portion 361 has one end in the second direction X connected to the first bent portion 31 and the other end in the second direction X connected to the second bent portion 32.
[0024] 3, the first contact portion 40 and the second contact portion 50 are located on the same side as the second curved portion 32 with respect to the center line CL in the second direction X. The first contact portion 40 and the second contact portion 50 have a shape and size corresponding to, for example, a terminal of an inspection device or an object to be inspected.
[0025] As shown in Fig. 3, for example, the support portion 60 has a substantially rectangular shape, and is configured so that the dimension of the support portion 60 in the second direction X is larger than the dimension of the elastic portion 30 in the second direction X. That is, in this embodiment, the dimension of the elastic portion 30 in the second direction X is smaller than the dimension of the support portion 60 in the second direction X. In this embodiment, as shown in Fig. 2, both ends of the support portion 60 in the second direction X are clamped by the housing main body 21 and the lid portion 22, respectively. As a result, the support portion 60 is supported by the housing 2, and movement of the probe pin 10 in the first direction Z is restricted.
[0026] As shown in Fig. 3, the support portion 60 has a protrusion 61. The protrusion 61 is located on the opposite side of the center line CL from the first curved portion 31, and extends from the support portion 60 toward the first contact portion 40 in the first direction Z. As shown in Fig. 2, the protrusion 61 is configured to face the inner surface 213 of the housing main body 21 that constitutes the accommodating portion 23 in the second direction X. The inner surface 213 extends along the first direction Z and intersects with the inner surface 212.
[0027] In this embodiment, of the first curved portion 31 and the second curved portion 32, the first curved portion 31 is located closest to the support portion 60 in the first direction Z. As shown in FIG. 2 , the first curved portion 31 closest to the support portion 60 in the first direction Z (i.e., the curved portion 313) faces the inner surface 214 of the housing main body 21 that constitutes the accommodating portion 23 in the second direction X. The inner surface 214 extends along the first direction Z, intersects with the inner surface 212, and faces the inner surface 213 in the second direction X. The protrusion 61 and the first curved portion 31 (i.e., the curved portion 313) restrict movement of the probe pin 10 in the second direction X.
[0028] A recess 62 is provided in a portion of the support portion 60 facing the elastic portion 30, recessed from the first contact portion 40 toward the second contact portion 50 in the first direction Z. The recess 62 is adjacent to the curved portion 313 in the second direction X, and is located closer to the center line CL than the curved portion 313.
[0029] In this embodiment, the probe pin 10 includes an elastic portion 70 connecting the second contact portion 50 and the support portion 60. As an example, the elastic portion 70 includes a curved portion 71 located on the first curved portion 31 side with respect to the center line CL and a non-bent portion 72 extending along the second direction X. The curved portion 71 has a substantially quarter-circle sector shape and is located at a position overlapping the curved portion 313 when viewed along the first direction Z. The elastic portion 70 includes two elastic pieces 701 and 702 located with a gap 710 between them. One end of the curved portion 71 in the extension direction of the curved portion 71 (in other words, the direction along the shape of the elastic portion 70) is connected to the support portion 60, and the other end of the curved portion 71 in the extension direction is connected to the non-bent portion 72. One end of the non-bent portion 72 in the second direction X is connected to the curved portion 71, and the other end of the non-bent portion 72 in the second direction X is connected to the second contact portion 50.
[0030] The probe pin 10 can provide the following effects.
[0031] The probe pin 10 includes a first contact portion 40 and a second contact portion 50 spaced apart in the first direction Z, a support portion 60, and an elastic portion 30. The support portion 60 is located between the first contact portion 40 and the second contact portion 50 in the first direction Z and extends in the second direction X. The elastic portion 30 is connected to the first contact portion 40 and the support portion 60 and is configured to expand and contract along the first direction Z. The elastic portion 30 includes a plurality of first curved portions 31 and at least one second curved portion 32. The plurality of first curved portions 31 are located on one side of a center line CL that passes through the center of the support portion 60 in the second direction X and extends in the first direction Z, and each protrudes in a direction away from the center line CL in the second direction X. The at least one second curved portion 32 is located on the opposite side of 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 X. The first curved portions 31 and the second curved portions 32 are positioned alternately in the first direction Z. A first imaginary straight line L1 connecting points P1 of two first curved portions 31 adjacent to each other in the first direction Z that are farthest from the center line CL in the second direction X is inclined with respect to the center line CL. With this configuration, the balance of stress applied to the elastic portion 30 can be adjusted, thereby realizing a probe pin 10 that can improve durability.
[0032] The elastic portion 30 includes a plurality of elastic pieces and at least one connecting portion 33. The plurality of elastic pieces are positioned with gaps 310 between them in the width direction. The connecting portion 33 has both ends in the width direction connected to two adjacent elastic pieces 301, 302 among the plurality of elastic pieces. The connecting portion 33 is positioned between the first curved portion 31 and the second curved portion 32 in the second direction X. This configuration makes it possible to more reliably adjust the balance of stress applied to the elastic portion 30.
[0033] The elastic portion 30 includes a first portion 34 that is a portion between the first contact portion 40 and the connection portion 33 closest to the first contact portion 40, and a second portion 35 other than the first portion 34. The widthwise dimension of the first portion 34 is greater than the widthwise dimension of the second portion 35. With this configuration, the balance of stress applied to the elastic portion 30 can be adjusted more reliably.
[0034] Socket 1 can provide the following benefits:
[0035] The socket 1 includes a probe pin 10 and a housing 2 that accommodates the probe pin 10. The dimension of the elastic portion 30 in the second direction X is smaller than the dimension of the support portion 60 in the second direction X, and the support portion 60 is supported by the housing 2. With this configuration, it is possible to realize a socket 1 that can improve durability.
[0036] Of the first curved portion 31 and the second curved portion 32, the first curved portion 31 is located closest to the support portion 60 in the first direction Z. The support portion 60 has a protrusion 61 located on the opposite side of the center line CL from the first curved portion 31. The protrusion 61 extends from the support portion 60 toward the first contact portion 40 in the first direction Z. The protrusion 61 and the first curved portion 31 are configured to come into contact with the housing 2 in the second direction X, thereby restricting movement of the probe pin 10 in the second direction X. This configuration more reliably realizes a socket 1 that can improve durability.
[0037] The probe pin 10 can be configured as follows.
[0038] 4, the elastic portion 30 may be configured to include a plurality of second curved portions 32, and a second imaginary straight line L2 connecting points P2 of the plurality of second curved portions 32 may be inclined with respect to the center line CL. By configuring in this manner, the balance of stress applied to the elastic portion 30 can be adjusted more reliably.
[0039] In the probe pin 10 shown in Fig. 4, the size of the first contact portion 40 when viewed along the third direction Y and the length of the first portion 34 in the second direction X are smaller than those of the probe pin 10 shown in Fig. 3. The inclination angle of the first virtual straight line L1 with respect to the center line CL is smaller than that of the probe pin 10 shown in Fig. 3.
[0040] The elastic portion 30 may include no more than one elastic piece, or may include three or more elastic pieces. Fig. 5 shows an example of a probe pin 10 having an elastic portion 30 including three elastic pieces 301, 302, and 303. A gap 310 is provided between each two elastic pieces adjacent in the width direction. The connecting portions 33 can be disposed at any position between the first curved portion 31 and the second curved portion 32 in the second direction X. For example, in the probe pin 10 shown in Fig. 5, the elastic portion 30 includes ten connecting portions 33. The ten connecting portions 33 are located closer to the center line CL than the probe pin 10 shown in Fig. 3.
[0041] 3 to 5, the first contact portion 40 and the second contact portion 50 are located on the same side of the center line CL as the second curved portion 32 in the second direction X, but this is not limiting. For example, the first contact portion 40 and the second contact portion 50 may be located on the same side of the center line CL as the first curved portion 31 in the second direction X, or the first contact portion 40 may be located on the same side of the center line CL as the first curved portion 31, and the second contact portion 50 may be located on the same side of the center line CL as the second curved portion 32.
[0042] The elastic pieces 301, 302 and the gap 310 may or may not have a constant width dimension. In other words, the elastic part 30 may or may not have a first portion 34 and a second portion 35.
[0043] In this way, the configuration of each part of the probe pin 10 (for example, the elastic part 30, the first contact part 40, and the second contact part 50) can be changed depending on the design of the probe pin 10, etc.
[0044] Various aspects of the disclosure are described below with reference to accompanying reference numerals.
[0045] The probe pin 10 according to the first aspect of the present disclosure comprises: a first contact portion 40 and a second contact portion 50 spaced apart in a first direction; a support portion (60) located between the first contact portion (40) and the second contact portion (50) in the first direction and extending in a second direction intersecting the first direction; an elastic portion (30) connected to the first contact portion (40) and the support portion (60) and configured to expand and contract along the first direction; Equipped with The elastic portion 30 is a plurality of first curved portions 31 that are located on one side of a center line CL that passes through a center in the second direction of the support portion 60 and extends in the first direction, and that protrude in a direction away from the center line CL in the second direction; at least one second curved portion 32 located on the opposite side of the first curved portion 31 with respect to the center line CL and protruding in the opposite direction to the first curved portion 31 in the second direction; Including, the first curved portions 31 and the second curved portions 32 are alternately positioned in the first direction, Of the multiple first curved portions 31, a first virtual straight line L1 connecting the points P1 farthest from the center line CL in the second direction of two first curved portions 31 adjacent to each other in the first direction is inclined with respect to the center line CL.
[0046] The probe pin 10 of the second aspect of the present disclosure is the probe pin 10 of the first aspect, The elastic portion 30 is a plurality of elastic pieces positioned with gaps between them in a width direction intersecting the extension direction of the elastic portion; At least one connecting portion 33 is provided, in which both ends in the width direction are connected to two adjacent elastic pieces among the plurality of elastic pieces; Including, The connecting portion 33 is located between the first curved portion 31 and the second curved portion 32 in the second direction.
[0047] The probe pin 10 of the third aspect of the present disclosure is the probe pin 10 of the second aspect, the elastic portion 30 includes a first portion 34 that is a portion between the first contact portion 40 and the connecting portion 33 that is closest to the first contact portion 40, and a second portion 35 other than the first portion 34, The dimension of the first portion 34 in the width direction is greater than the dimension of the second portion 35 in the width direction.
[0048] The probe pin 10 of a fourth aspect of the present disclosure is the probe pin 10 according to any one of the first to third aspects, The elastic portion 30 includes a plurality of the second curved portions 32, A second imaginary straight line L2 connecting points P2 of each of the second curved portions 32 that are farthest from the center line CL in the second direction is inclined with respect to the center line CL.
[0049] The socket 1 according to the fifth aspect of the present disclosure includes: The probe pin 10 according to any one of the first to third aspects, a housing 2 for accommodating the probe pin 10; Equipped with The dimension of the elastic portion 30 in the second direction is smaller than the dimension of the support portion 60 in the second direction, The support portion 60 is supported by the housing 2 .
[0050] The socket 1 of the sixth aspect of the present disclosure is the socket 1 of the fifth aspect, Of the first curved portion 31 and the second curved portion 32, the first curved portion 31 is located closest to the support portion 60 in the first direction, the support portion (60) is located on the opposite side of the first curved portion (31) with respect to the center line (CL), and has a protrusion (61) extending from the support portion (60) toward the first contact portion (40) in the first direction; The protrusion 61 and the first curved portion 31 are configured to come into contact with the housing 2 in the second direction to restrict movement of the probe pin 10 in the second direction.
[0051] 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.
[0052] 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]
[0053] The probe pins and sockets of the present disclosure can be used, for example, to test batteries. [Explanation of symbols]
[0054] 1 socket 2. Housing 3 Fastening members 10 probe pins 21 Housing body 211, 212, 213, 214 sides 22 Lid 23 Storage unit 24 First Opening 25 Second opening 26 Third Opening 27 Through hole 30 Elastic part 301, 302, 303 Elastic pieces 310 Gap 31 First curved section 311, 312, 313 curved section 32 Second curved section 33 Connection 34 Part 1 35 Part 2 36 Non-curved section 361 Non-curved section 40 First contact part 41 Tip 50 Second contact part 51 Tip 60 Support part 61 Protrusion 62 recess 70 Elastic part 701, 702 Elastic piece 710 Gap 71 Curved section 72 Non-curved section
Claims
1. a first contact portion and a second contact portion spaced apart in a first direction; a support portion located between the first contact portion and the second contact portion in the first direction and extending in a second direction intersecting the first direction; an elastic portion connected to the first contact portion and the support portion and configured to expand and contract along the first direction; Equipped with The elastic portion is a plurality of first curved portions located on one side of a center line passing through a center in the second direction of the support portion and extending in the first direction, and each 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 and protruding in an opposite direction to the first curved portion in the second direction; Including, the first curved portions and the second curved portions are alternately positioned in the first direction, a first virtual line connecting points of two of the first curved portions adjacent to each other in the first direction that are farthest from the center line in the second direction is inclined with respect to the center line.
2. The elastic portion is a plurality of elastic pieces positioned with gaps between them in a width direction intersecting the extension direction of the elastic portion; At least one connecting portion is provided at both ends in the width direction of two adjacent elastic pieces among the plurality of elastic pieces; Including, The probe pin according to claim 1 , wherein the connection portion is located between the first curved portion and the second curved portion in the second direction.
3. the elastic portion includes a first portion that is a portion between the first contact portion and the connection portion that is closest to the first contact portion, and a second portion other than the first portion, The probe pin according to claim 2 , wherein a dimension of the first portion in a width direction intersecting with an extension direction of the elastic portion is larger than a dimension of the second portion in the width direction.
4. the elastic portion includes a plurality of the second curved portions, 4. The probe pin according to claim 1, wherein a second virtual line connecting points of each of the second curved portions that are farthest from the center line in the second direction is inclined with respect to the center line.
5. The probe pin according to any one of claims 1 to 3, a housing for accommodating the probe pin; Equipped with a dimension of the elastic portion in the second direction being smaller than a dimension of the support portion in the second direction; The socket, wherein the support portion is supported by the housing.
6. Of the first curved portion and the second curved portion, the first curved portion is located closest to the support portion in the first direction, the support portion is located on the opposite side of the first curved portion with respect to the center line and has a protrusion portion extending from the support portion toward the first contact portion in the first direction, The socket according to claim 5 , wherein the protrusion and the first curved portion are configured to contact the housing in the second direction to restrict movement of the probe pin in the second direction.