Sockets for electrical components

Abstract

To improve the efficiency of contact unit replacement work. [Solution] The electrical component socket is detachably provided on the upper surface of a base member and comprises a contact unit having a unit body whose lower end is inserted into a through hole in the base member, and a pin-shaped first contact held by the unit body, and a second contact having an arm portion that protrudes toward the set area so as to overlap with the unit body in a plan view. The base member and / or the unit body are provided with recesses to avoid interference with the arm portion when removing the contact unit from the base member.

Description

Technical Field

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[0001] The present invention relates to a socket for electrical components.

Background Art

[0002] Conventionally, when performing an electrical test on an electrical component such as a power semiconductor, it is known to electrically connect the electrical component and a test wiring board by means of pin-shaped contacts (see Patent Document 1 etc.). The tip of the pin-shaped contact (referred to as a contact probe in Patent Document 1) can contact the terminal of the electrical component.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A contact unit in which a plurality of pin-shaped contacts are unitized may be used in a socket for electrical components. The contact unit is detachably provided on the upper surface of the base member of the socket for electrical components. The tip of the pin-shaped contact can contact the terminal of the electrical component set in the set region above the upper surface of the base member from below.

[0005] When measuring the current between the terminals of an electrical component in an electrical test of the electrical component, a second contact for applying a large current larger than the signal current to the electrical component may be used in the socket for electrical components. The second contact is detachable from the upper surface of the base member and has an arm portion that protrudes toward the set region so as to overlap the unit body of the contact unit in plan view. The tip of the arm portion of the second contact can contact the terminal of the electrical component set in the set region from below.

[0006] In an electrical component socket equipped with a contact unit and a second contact, as described above, the arm portion of the second contact overlaps with the unit body of the contact unit in a plan view. Therefore, when replacing the contact unit with a base member, it is necessary to remove the second contact from the base member before removing the used contact unit from the base member in order to avoid interference with the arm portion of the second contact. After attaching the contact unit to be used to the base member, the second contact must be attached to the base member. As a result, the contact unit replacement process takes a lot of time and effort, making it difficult to improve the efficiency of the replacement process.

[0007] Therefore, the object of the present invention is to provide an electrical component socket that can shorten the time required for replacing contact units and improve the efficiency of such replacement work. [Means for solving the problem]

[0008] One embodiment of the electrical component socket of the present invention is: A base member having a through hole, A contact unit comprising a unit body detachably provided on the upper surface of the base member, with its lower end inserted into the through hole, and a pin-shaped first contact held by the unit body, wherein the tip of the first contact can contact the terminals of an electrical component set in the upper set area of ​​the upper surface of the base member from below, The unit comprises an arm portion that protrudes toward the set area so as to overlap with the unit body in a plan view, and a second contact whose tip is capable of contacting the terminals of an electrical component set in the set area from below, The base member and / or the unit body are provided with recesses to avoid interference with the arm portion when removing the contact unit from the base member. [Effects of the Invention]

[0009] According to the present invention, the time required for replacing the contact unit can be reduced, thereby improving the efficiency of the replacement process. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic front view of an electrical component socket according to the first embodiment, showing a cross-sectional view of a part of the base member. [Figure 2] Figure 2 is a schematic plan view of an electrical component socket according to the first embodiment. [Figure 3] Figure 3 is a schematic perspective view of an electrical component socket according to the first embodiment. [Figure 4] Figure 4 is a schematic front view of an electrical component socket according to the second embodiment, showing a cross-sectional view of a part of the base member. [Figure 5] Figure 5 is a schematic plan view of an electrical component socket according to the second embodiment. [Figure 6] Figure 6 is a schematic perspective view of an electrical component socket according to the second embodiment. [Figure 7] Figure 7 is a schematic front view of an electrical component socket according to the third embodiment, showing a cross-sectional view of a part of the base member. [Figure 8] Figure 8 is a schematic plan view of an electrical component socket according to the third embodiment. [Figure 9] Figure 9 is a schematic perspective view of an electrical component socket according to the third embodiment. [Figure 10] Figure 10 is a schematic front view of an electrical component socket according to the fourth embodiment, showing a cross-sectional view of a part of the base member. [Figure 11] Figure 11 is a schematic plan view of an electrical component socket according to the fourth embodiment. [Figure 12] Figure 12 is a schematic perspective view of an electrical component socket according to the fourth embodiment. [Figure 13] Figure 13 is a schematic perspective view of an electrical component socket according to the fourth embodiment, and is a perspective view taken from a different direction than that shown in Figure 12.

Best Mode for Carrying Out the Invention

[0011] Hereinafter, this embodiment will be described with reference to the drawings. In the drawings, "LD" indicates the left direction, "RD" indicates the right direction, "FD" indicates the front direction, "BD" indicates the rear direction, "UD" indicates the upward direction, and "DD" indicates the downward direction, respectively.

[0012] [First Embodiment] Referring to FIGS. 1 to 3, the configuration of the socket 10 for electrical components according to the first embodiment will be described. FIG. 1 is a schematic front view of the socket 10 for electrical components according to the first embodiment, and a part of the base member 12 is shown in cross section. FIG. 2 is a schematic plan view of the socket 10 for electrical components according to the first embodiment. FIG. 3 is a schematic perspective view of the socket 10 for electrical components according to the first embodiment.

[0013] As shown in FIG. 1, the socket 10 for electrical components according to the first embodiment is a device used for electrical inspections such as burn-in inspections of the electrical component P. The electrical component P is, as an example, a power semiconductor to which a high voltage (for example, a voltage of 500 V or more) or a high current (for example, a current of 1000 A or more) is supplied, and has a plurality of power terminals Pt and a plurality of signal terminals Pe.

[0014] The socket 10 for electrical components is disposed on an inspection wiring board (not shown) connected to an inspection device (not shown). The socket 10 for electrical components electrically connects the power terminal Pt of the electrical component P to the power electrode (not shown) of the inspection wiring board, and also electrically connects the power terminal Pt of the electrical component P to the signal electrode (not shown) of the inspection wiring board. The socket 10 for electrical components electrically connects the signal terminal Pe of the electrical component P to the signal electrode (not shown) of the inspection wiring board.

[0015] As shown in Figures 1 to 3, the electrical component socket 10 includes a base member 12, which has a pair of through holes 14. The pair of through holes 14 are spaced apart in the left-right direction, and each through hole 14 extends in the front-rear direction. Above the upper surface of the base member 12 is a set area SA for setting electrical components P. The electrical component socket 10 also includes a support member (not shown) for supporting the electrical components P in the set area SA, and a pressing member (not shown) for pressing the electrical components P set in the set area SA towards the upper surface of the base member 12.

[0016] The electrical component socket 10 includes a pair of contact units 18 that are detachably mounted on the upper surface of a base member 12 via a plurality of set screws 16. The pair of contact units 18 are spaced apart in the left-right direction, and each contact unit 18 is positioned to correspond to each through hole 14 of the base member 12. By loosening each set screw 16, the fixed state of each contact unit 18 to the base member 12 can be released.

[0017] Each contact unit 18 has a unit body 20 that extends in the front-rear direction, and the lower end of the unit body 20 is inserted into each through hole 14 of the base member 12. The lower end of the unit body 20 may also be inserted in a fitted state into each through hole 14 of the base member 12. Each contact unit 18 also has a mounting base 22 provided on the side closer to the lower end of the unit body 20, and each mounting base 22 is detachably attached to the upper surface of the base member 12 via a plurality of set screws 16. Each mounting base 22 extends in the front-rear direction, and the height position of the upper surface of each mounting base 22 is located at a lower height position than the height position of the upper surface of each unit body 20. By providing the mounting base 22 on the side closer to the lower end of the unit body 20, the contact unit 18 can be stably attached to the base member 12.

[0018] Each contact unit 18 has a plurality of pin-shaped first contacts 24 (24A, 24B) provided on each unit body 20. Each first contact 24 (24A, 24B) is held in an upward biased state by a biasing member (not shown), such as a coil spring, on the unit body 20.

[0019] The tip (upper end) of each first contact 24 (24A, 24B) protrudes upward from the upper surface of the unit body 20. The tip of each first contact 24A can contact the power terminal Pt of the electrical component P set in the set area SA from below. The base (lower end) of each first contact 24A protrudes downward from the lower surface of the unit body 20 and can contact the power electrode of the test wiring board. Each first contact 24A is used when measuring the voltage between the power terminal Pt of the electrical component P. In addition, the tip of each first contact 24B can contact the signal terminal Pe of the electrical component P set in the set area SA from below. The base of each first contact 24B protrudes downward from the lower surface of the unit body 20 and can contact the signal electrode of the test wiring board.

[0020] As shown in Figures 1 to 3, the electrical component socket 10 is equipped with a pair of support blocks 26 provided on both the left and right ends of the upper surface of the base member 12, and each pair of support blocks 26 is spaced apart in the front-to-back direction. Each support block 26 is made of a highly conductive metal such as a copper alloy and may be configured to be detachably attached to the upper surface of the base member 12 via set screws (not shown). The height of the upper surface of each support block 26 is higher than the height of the upper surface of each mounting base 22 and lower than the height of the upper surface of each unit body 20. Each support block 26 is electrically connected to the power electrodes of the wiring board.

[0021] The electrical component socket 10 is equipped with second contacts 30 that are detachably mounted on the upper surface of each support block 26 via mounting fixtures 28. In other words, a pair of second contacts 30 are detachably mounted on both ends in the left-right direction on the upper surface of the base member 12 via the support blocks 26 and mounting fixtures 28. Each second contact 30 is used to measure the current between the power terminals Pt of the electrical component P, and is a contact for applying a large current greater than the signal current to the electrical component P. Each second contact 30 is detachably mounted to the upper surface of the base member 12 via the support blocks 26 and mounting fixtures 28.

[0022] Each second contact 30 has a contact base 32 provided on the upper surface of each support block 26 and a horizontal L-shaped arm portion 34 provided on the contact base 32. The arm portion 34 of each second contact 30 protrudes toward the set area SA so as to overlap with the contact unit 18 in a plan view. The arm portion 34 of each second contact 30 is also formed in a comb-like shape. The tip of the arm portion 34 of each second contact 30 can contact the power terminal Pt of the electrical component P set in the set area SA from below. The tip of the first contact 24 corresponding to the tip of the arm portion 34 of each second contact 30 contacts the common power terminal Pt of the electrical component P from below. Each second contact 30 is electrically connected to the power electrode of the wiring board via each support block 26.

[0023] In this embodiment, the direction parallel to the protruding direction of the arm portion 34 of each second contact 30 is the left-right direction. The direction perpendicular to the protruding direction of the arm portion 34 of each second contact 30 is the front-rear direction. Each mounting fixture 28 has a Z-shaped (crank-shaped) clamper 36 that grips the contact base 32 of each second contact 30 in cooperation with the upper surface of each support block 26, and a fixing screw 38 that fixes the clamper 36 to the upper surface of each support block 26. The electrical component socket 10 may also include a metal shielding plate (not shown) disposed between adjacent support blocks 26 in the front-rear direction.

[0024] As shown in Figures 1 to 3, the base member 12 has a pair of bottomed recesses 40 that are continuous with the through hole 14, and the pair of recesses 40 are spaced apart in the left-right direction. Each recess 40 of the base member 12 is a space to avoid interference with the arm portion 34 of the second contact 30 when removing the contact unit 18 from the base member 12. Each recess 40 of the base member 12 extends in the front-rear direction and is located on the left-right edge side of the through hole 14, on the side farther from the second contact 30. The inner wall 44f of each recess 40 of the base member 12 on the side farther from the through hole 14 is inclined with respect to the thickness direction of the base member 12 so as to gradually move away from the through hole 14 in the upward direction.

[0025] The length of each recess 40 of the base member 12 in the front-to-back direction is longer than the length of the unit body 20 in the front-to-back direction. The length of each recess 40 of the base member 12 in the left-to-right direction is longer than the length corresponding to the length by which the arm portion 34 of the second contact 30 overlaps with the contact unit 18 in a plan view. The length corresponding to the length by which the arm portion 34 of the second contact 30 overlaps with the contact unit 18 in a plan view is the left-to-right length necessary to avoid interference between the unit body 20 and the arm portion 34 of the second contact 30.

[0026] Next, the operation of the electrical component socket 10 according to the first embodiment will be described.

[0027] As shown in Figure 1, the electrical component P is set in the set area SA by supporting it with a support member. Then, the tip of each first contact 24A contacts the corresponding power terminal Pt of the electrical component P, and the tip of each first contact 24B contacts the corresponding signal terminal Pe of the electrical component P. The tip of the arm portion 34 of each second contact 30 contacts the corresponding power terminal Pt of the electrical component P.

[0028] Subsequently, the pressing member presses the electrical component P against the upper surface of the base member 12. As a result, the base end of each first contact 24A makes stable contact with the corresponding power electrode of the test wiring board, and the base end of each first contact 24B makes stable contact with the corresponding signal electrode of the test wiring board. In addition, the contact state between the tip of each first contact 24A and the corresponding power terminal Pt of the electrical component P, and the contact state between the tip of each first contact 24B and the corresponding signal terminal Pe of the electrical component P are stabilized. The contact state between the tip of the arm portion 34 of each second contact 30 and the corresponding power terminal Pt of the electrical component P is also stabilized.

[0029] This electrically connects each power terminal Pt of the electrical component P to the corresponding power electrode of the test wiring board via each first contact 24A. Electrically connects each power terminal Pe of the electrical component P to the corresponding signal electrode of the test wiring board via each first contact 24B. Electrically connects each power terminal Pt of the electrical component P to the corresponding power electrode of the test wiring board via each second contact 30. As a result, the test device can perform electrical tests such as burn-in tests on the electrical component P.

[0030] According to the configuration of the electrical component socket 10 according to the first embodiment, as described above, the base member 12 has a recess 40 that is continuous with the through hole 14. The recess 40 of the base member 12 is located on the left-right edge side of the through hole 14, on the side farther from the second contact 30. The length of each recess 40 of the base member 12 in the front-rear direction and the length in the left-right direction are appropriately defined as described above. Therefore, by releasing the fixing state of the contact unit 18 to the base member 12 and moving the contact unit 18 towards the recess 40 side (see Figure 1), it is possible to prevent it from overlapping with the arm portion 34 of the second contact 30. Specifically, the fixing state of one (right) contact unit 18 to the base member 12 is released, and the one contact unit 18 is moved to the left, towards the recess 40 side. The fixing state of the other (left) contact unit 18 to the base member 12 is released, and the other contact unit 18 is moved to the right, towards the recess 40 side.

[0031] In other words, by moving the contact unit 18 towards the recess 40 and lifting it, the contact unit 18 can be removed from the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. Conversely, by performing the reverse operation, the contact unit 18 can be attached to the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. This allows the contact unit 18 to be replaced while the second contact 30 is attached to the upper surface of the base member 12 via the support block 26.

[0032] Therefore, according to the electrical component socket 10 of the first embodiment, the time required for replacing the contact unit 18 can be shortened, and the work efficiency of the replacement work can be improved.

[0033] Furthermore, according to the configuration of the electrical component socket 10 according to the first embodiment, as described above, the inner wall 44f on the side of each recess 40 of the base member 12 that is farther from the through hole 14 is inclined with respect to the thickness direction of the base member 12. Therefore, the contact unit 18 can be moved toward the recess 40 while tilted toward the inner wall 44f side of the recess 40.

[0034] Therefore, according to the electrical component socket 10 of the first embodiment, the contact unit 18 becomes easier to lift, and the workability of replacing the contact unit 18 can be further improved.

[0035] [Second Embodiment] The configuration of the electrical component socket 42 according to the second embodiment will be described with reference to Figures 4 to 6. Figure 4 is a schematic front view of the electrical component socket 42 according to the second embodiment, showing a cross-sectional view of a part of the base member 12. Figure 5 is a schematic plan view of the electrical component socket 42 according to the second embodiment. Figure 6 is a schematic perspective view of the electrical component socket 42 according to the second embodiment.

[0036] As shown in Figures 4 to 6, the electrical component socket 42 according to the third embodiment is a device used for electrical testing such as burn-in testing of electrical components P, and has the same configuration as the electrical component socket 10 according to the first embodiment (see Figures 1 to 3). The differences in the configuration of the electrical component socket 42 according to the second embodiment compared to the configuration of the electrical component socket 10 according to the first embodiment will be explained below. For the sake of convenience, components having the same function as those described in the first embodiment will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0037] The base member 12 has a pair of bottomless recesses 44 that are continuous with the through hole 14, instead of a pair of bottomed recesses 40 (see Figures 1 and 2), and the pair of recesses 44 are spaced apart in the left-right direction. Each recess 44 of the base member 12 is a space to avoid interference with the arm portion 34 of the second contact 30 when removing the contact unit 18 from the base member 12. Each recess 44 of the base member 12 extends in the front-rear direction and is located on the left-right edge side of the through hole 14, on the side farther from the second contact 30.

[0038] The length of each recess 44 of the base member 12 in the front-to-back direction is longer than the length of the unit body 20 in the front-to-back direction. The length of each recess 44 of the base member 12 in the left-to-right direction is longer than the length corresponding to the length by which the arm portion 34 of the second contact 30 overlaps with the contact unit 18 in a plan view.

[0039] The operation of the electrical component socket 42 according to the second embodiment is performed in the same manner as the operation of the electrical component socket 10 according to the first embodiment described above.

[0040] According to the configuration of the electrical component socket 42 according to the second embodiment, as described above, the base member 12 has a recess 44 that is continuous with the through hole 14. The recess 44 of the base member 12 is located on the left-right edge side of the through hole 14, on the side farther from the second contact 30. The length of the recess 44 of the base member 12 in the front-rear direction and the length in the left-right direction are appropriately defined as described above. Therefore, by releasing the fixing state of the contact unit 18 to the base member 12 and moving the contact unit 18 towards the recess 44 side (see Figure 4), it is possible to prevent it from overlapping with the arm portion 34 of the second contact 30 in a plan view. Specifically, the fixing state of one contact unit 18 to the base member 12 is released, and the one contact unit 18 is moved to the left, towards the recess 44 side. The fixing state of the other contact unit 18 to the base member 12 is released, and the other contact unit 18 is moved to the right, towards the recess 44 side.

[0041] In other words, by moving the contact unit 18 towards the recess 44 and lifting it, the contact unit 18 can be removed from the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. Conversely, by performing the reverse operation, the contact unit 18 can be attached to the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. This allows the contact unit 18 to be replaced while the second contact 30 is attached to the upper surface of the base member 12 via the support block 26.

[0042] Therefore, according to the electrical component socket 42 of the second embodiment, the time required for replacing the contact unit 18 can be shortened, and the work efficiency of the replacement work can be improved.

[0043] [Third Embodiment] The configuration of the electrical component socket 46 according to the third embodiment will be described with reference to Figures 7 to 9. Figure 7 is a schematic front view of the electrical component socket 46 according to the third embodiment, showing a cross-sectional view of a part of the base member 12. Figure 8 is a schematic plan view of the electrical component socket 46 according to the third embodiment. Figure 9 is a schematic perspective view of the electrical component socket 46 according to the third embodiment.

[0044] As shown in Figures 7 to 9, the electrical component socket 46 according to the third embodiment is a device used for electrical testing such as burn-in testing of electrical components P, and has the same configuration as the electrical component socket 42 according to the second embodiment (see Figures 4 to 6). The differences in the configuration of the electrical component socket 46 according to the third embodiment compared to the configuration of the electrical component socket 42 according to the second embodiment will be explained below. For the sake of convenience of explanation, the same reference numerals are used for components that have the same function as those described in the first embodiment, and their descriptions will not be repeated.

[0045] A pair of second contacts 30 are detachably provided on the right end of the upper surface of the base member 12 via a support block 26 and a mounting fixture 28. A single second contact 30 is detachably provided on the left end of the upper surface of the base member 12 via a support block 26 and a mounting fixture 28.

[0046] A bottomless recess 44 is provided on the right side of the base member 12 (the part to the right of the center) and is continuous with one of the through holes 14. The recess 44 of the base member 12 is a space to avoid interference with the arm portion 34 of the second contact 30 when removing one of the contact units 18 from the base member 12. The recess 44 of the base member 12 extends in the front-rear direction and is located on the left-right edge side of one of the through holes 14, on the side farther from the second contact 30. The length of the recess 44 of the base member 12 in the front-rear direction and the length in the left-right direction are defined in the same way as in the second embodiment.

[0047] On the left side of the base member 12 (the part to the left of the center), instead of the recess 44, a bottomless recess 48 is provided, which is continuous with the other through hole 14. The recess 48 of the base member 12 is a space to avoid interference with the arm portion 34 of the second contact 30 when removing the other contact unit 18 from the base member 12. The recess 48 of the base member 12 is located on the front-rear edge side of the other through hole 14.

[0048] The length of the recess 48 of the base member 12 in the left-right direction is longer than the length of the unit body 20 in the left-right direction. The length of the recess 48 of the base member 12 in the front-rear direction is longer than the length (width) of the arm portion 34 of the second contact 30 in the front-rear direction.

[0049] The operation of the electrical component socket 46 according to the third embodiment is the same as the operation of the electrical component socket 10 according to the first embodiment (see Figures 1 to 3).

[0050] According to the configuration of the electrical component socket 46 according to the third embodiment, as described above, a recess 48 is provided on the right side of the base member 12, continuous with one of the through holes 14. The recess 44 of the base member 12 is located on the left-right edge side of one of the through holes 14, on the side farther from the second contact 30. The length of the recess 44 of the base member 12 in the front-rear direction and the length in the left-right direction are appropriately defined as described above. Therefore, by releasing the fixing state of the contact unit 18 to the base member 12 and moving one of the contact units 18 toward the recess 44 side (see Figure 7), it is possible to prevent it from overlapping with the arm portion 34 of the second contact 30 in a plan view. Specifically, the fixing state of one of the contact units 18 to the base member 12 is released, and one of the contact units 18 is moved to the left, toward the recess 44 side.

[0051] In other words, by moving one contact unit 18 towards the recess 44 and lifting it up, one contact unit 18 can be removed from the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. Conversely, by performing the reverse operation, one contact unit 18 can be attached to the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. This allows the replacement of one contact unit 18 to be performed with the second contact 30 attached to the upper surface of the base member 12 via the support block 26.

[0052] Furthermore, as mentioned above, a recess 48 is provided on the left side of the base member 12, continuous with the other through hole 14. The recess 48 of the base member 12 is located on the front-rear edge side of the other through hole 14. The length of the recess 48 of the base member 12 in the left-right direction and the length in the front-rear direction are appropriately defined as described above. Therefore, by releasing the fixing state of the other contact unit 18 to the base member 12 and moving the other contact unit 18 toward the recess 44 side (see Figure 8), it is possible to prevent it from overlapping with the arm portion 34 of the second contact 30 in a plan view. Specifically, the fixing state of the other contact unit 18 to the base member 12 is released, and the other contact unit 18 is moved toward the rear, toward the recess 44 side.

[0053] In other words, by moving the other contact unit 18 towards the recess 48 and lifting it up, the other contact unit 18 can be removed from the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. Conversely, by performing the reverse operation, the other contact unit 18 can be attached to the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. This allows the other contact unit 18 to be replaced while the second contact 30 is attached to the upper surface of the base member 12 via the support block 26.

[0054] Therefore, according to the electrical component socket 46 of the third embodiment, the time required for replacing the contact unit 18 can be shortened, and the work efficiency of the replacement work can be improved.

[0055] [Fourth Embodiment] The configuration of the electrical component socket 50 according to the fourth embodiment will be described with reference to Figures 10 to 13. Figure 10 is a schematic front view of the electrical component socket 50 according to the fourth embodiment, showing a cross-sectional view of a part of the base member 12. Figure 11 is a schematic plan view of the electrical component socket 50 according to the fourth embodiment. Figures 12 and 13 are schematic perspective views of the electrical component socket 50 according to the fourth embodiment. Figure 13 is a perspective view taken from a different direction than that shown in Figure 12.

[0056] As shown in Figures 10 to 13, the electrical component socket 50 according to the fourth embodiment is a device used for electrical testing such as burn-in testing of electrical components P, and has the same configuration as the electrical component socket 10 according to the first embodiment (see Figures 1 to 3). The differences in the configuration of the electrical component socket 50 according to the fourth embodiment compared to the configuration of the electrical component socket 42 according to the first embodiment will be explained below. For the sake of convenience of explanation, components having the same function as those described in the first embodiment will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0057] Instead of having a recess 40 (see Figures 1 to 3) in the base member 12, each unit body 20 is provided with multiple recesses 52. Each recess 52 in each unit body 20 is a space to avoid interference with the arm portion 34 of the second contact 30 when removing the contact unit 18 from the base member 12. In a plan view, each recess 52 in each unit body 20 overlaps with the arm portion 34 of the second contact 30.

[0058] The length of each recess 52 in the front-to-back direction of each unit body 20 is longer than the length of the arm portion 34 of the second contact 30 in the front-to-back direction. The amount of recess in each recess 52 of each unit body 20 corresponds to the height position of the arm portion 34 of the second contact 30. The amount of recess corresponding to the height position of the arm portion 34 of the second contact 30 is the amount of recess necessary to avoid interference between the unit body 20 and the arm portion 34 of the second contact 30.

[0059] According to the configuration of the electrical component socket 50 according to the fourth embodiment, as described above, each unit body 20 is provided with a recess 52 that overlaps with the arm portion 34 of the second contact 30 in a plan view. The length in the front-rear direction and the amount of recess of the recess 52 of each unit body 20 are appropriately set as described above. Therefore, the contact unit 18 can be removed from the base member 12 by releasing the fixing state of the contact unit 18 to the base member 12 and lifting the contact unit 18 with the recess 52 overlapping with the arm portion 34 in a plan view. After that, one (right) contact unit 18 is moved to the left, which is the protruding direction of the arm portion 34 of the right second contact 30. The other (left) contact unit 18 is moved to the right, which is the protruding direction of the arm portion 34 of the left second contact 30.

[0060] In other words, by lifting the contact unit 18 while the recess 52 overlaps with the arm portion 34 of the second contact 30 in a plan view, the contact unit 18 can be removed from the base member 12 while avoiding interference with the arm portion 34. Conversely, by performing the reverse operation, the other contact unit 18 can be attached to the base member 12 while avoiding interference with the arm portion 34 of the second contact 30. This allows the replacement of the other contact unit 18 to be performed while the second contact 30 is attached to the upper surface of the base member 12 via the support block 26.

[0061] Therefore, according to the electrical component socket 50 of the fourth embodiment, the time required for replacing the contact unit 18 can be shortened, and the work efficiency of the replacement work can be improved.

[0062] Although this embodiment has been described in detail above, the present invention is not limited to the specific embodiments described above. Various modifications and changes are possible to the specific examples described in the above embodiments within the scope of the gist of the present invention as described in the claims. [Industrial applicability]

[0063] The present invention is useful as an electrical component socket that can improve the workability of contact unit replacement. [Explanation of Symbols]

[0064] 10. Socket for electrical components (Socket for electrical components according to the first embodiment) 12 Base member 14 Through holes 16 screws 18 Contact Units 20 Unit Body 22 Mounting platform 24 First Contact 24A First Contact 24B First Contact 26 Support Blocks 28 Mounting hardware 30 Second Contact 32 Contact base 34 Arm section 36 Clamper 38 Fixing screws 40 recess 42 Socket for electrical components (Socket for electrical components according to the second embodiment) 44 recess 44f inner wall 46. ​​Socket for electrical components (Socket for electrical components according to the third embodiment) 48 recess 50 Socket for electrical components (Socket for electrical components according to the fourth embodiment) 52 recess P Electrical components Pe signal terminal Pt power terminal SA Set Area

Claims

1. A base member having a through hole, A contact unit comprising a unit body detachably provided on the upper surface of the base member, with its lower end inserted into the through hole, and a pin-shaped first contact held by the unit body, wherein the tip of the first contact can contact the terminals of an electrical component set in the upper set area of ​​the upper surface of the base member from below, The unit comprises an arm portion that protrudes toward the set area so as to overlap with the unit body in a plan view, and a second contact whose tip is capable of contacting the terminals of an electrical component set in the set area from below, The base member and / or the unit body are provided with a recess to avoid interference with the arm portion when removing the contact unit from the base member. Socket for electrical components.

2. The recess is provided in the base member continuously with the through hole, and is located on the edge side of the through hole in a direction parallel to the protruding direction of the arm portion, and on the side farther from the second contact. The length of the recess in the direction perpendicular to the protruding direction of the arm portion is longer than the length of the unit body in the direction perpendicular, and the length of the recess in the direction parallel to the recess is longer than the length corresponding to the length to which the arm portion overlaps with the contact unit in a plan view. The socket for electrical components according to claim 1.

3. The inner wall of the recess on the side furthest from the through hole is inclined with respect to the thickness direction of the base member such that it gradually moves away from the through hole in an upward direction. The socket for electrical components according to claim 2.

4. The recess is provided in the base member continuously with the through hole and is positioned on the edge side in a direction perpendicular to the protruding direction of the arm portion in the through hole. The length of the recess in the direction parallel to the protruding direction of the arm portion is longer than the length of the unit body in the parallel direction, and the length of the recess in the orthogonal direction is longer than the length of the arm portion in the orthogonal direction. The socket for electrical components according to claim 1.

5. The recess is provided in the unit body and overlaps with the second contact in a plan view. The length of the recess in the direction perpendicular to the protruding direction of the arm portion is longer than the length of the arm portion in the direction perpendicular to the recess, and the amount of recess in the recess is the amount of recess corresponding to the height position of the arm portion. The socket for electrical components according to claim 1.

6. The contact unit is provided on the side closer to the lower end of the unit body and has a mounting base that is detachable from the upper surface of the base member. The socket for electrical components according to claim 1.

7. The tip of the first contact and the tip of the arm contact the common terminal of the electrical component. An electrical component socket according to any one of claims 1 to 6.

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