WO2020179761A1

WO2020179761A1 - Socket

Info

Publication number: WO2020179761A1
Application number: PCT/JP2020/008811
Authority: WO
Inventors: 一也武藤
Original assignee: 株式会社エンプラス
Priority date: 2019-03-06
Filing date: 2020-03-03
Publication date: 2020-09-10
Also published as: JP2020143988A; TW202046586A

Abstract

Provided is a socket wherein it is possible to easily change the height of a member used to apply pressure on an item subject to inspection. This socket is provided with: a base; a to-be-inspected item pressing member which has a first to-be-pressed surface and a second to-be-pressed surface that is located closer to the base than the first to-be-pressed surface is; and a cam which presses the to-be-inspected item pressing member toward the base. The cam has: a first pressing surface that comes into contact with the first to-be-pressed surface when the cam is rotated about a rotational axis thereof by a first angular degree from a reference position; and a second pressing surface that comes into contact with the second to-be-pressed surface when the cam is rotated about the rotational axis by a second angular degree from the reference position.

Description

socket

The present invention relates to a socket for inspecting electronic components.

In the manufacturing process of electronic components such as integrated circuits (ICs), various inspection devices are used to inspect electronic components. Some of these inspection devices apply a predetermined pressure to each of a plurality of types of objects to be inspected having different thicknesses. For example, Patent Document 1 discloses an inspection device that adjusts the height of a member for applying pressure to an object to be inspected by rotating a handle arm connected to an eccentric cam.

Japanese Unexamined Patent Publication No. 2010-15894

However, when the inspection device of Patent Document 1 is used to inspect an object to be inspected, since the eccentric cam has a circular roll shape, after rotating the handle arm by a specific angle, the handle arm is moved to that position. I had to fix it. For this reason, the inspection device of Patent Document 1 needs to fix the handle arm each time in order to perform the inspection by switching to a plurality of heights, and thus it is difficult to say that the heights can be easily switched.

Therefore, the present invention provides a socket in which the height of a member for applying a pressure to a device under test can be easily switched.

The socket according to the present invention includes a base, a first pressed surface, and an inspected body pressing member having a second pressed surface located closer to the base than the first pressed surface. A cam for pressing the object-pressing member to be inspected toward the base is provided, and the cam comes into contact with the first pressed surface when it is rotated by a first angle around a rotation axis from a reference posture. One pressing surface and a second pressing surface that comes into contact with the second pressed surface when rotated by the second angle about the rotation axis from the reference posture.

According to the present invention, there is provided a socket in which the height of a member for applying a pressure to a device under test can be easily switched.

FIG. 1 is a perspective view of a socket according to an embodiment of the present invention. FIG. 2 is a perspective view of the object pressing member according to the embodiment of the present invention. FIG. 3 is a front view of the cam according to the embodiment of the present invention. FIG. 4 is a perspective view of the pressure plate according to the embodiment of the present invention. FIG. 5 is a diagram showing a part of the cross-sectional view taken along the line AA shown in FIG. FIG. 6 is a cross-sectional view taken along the line BB shown in FIG. FIG. 7 is a cross-sectional view taken along the line CC shown in FIG. FIG. 8 is a cross-sectional view taken along the line DD shown in FIG. FIG. 9 is a diagram showing a part of a vertical cross-sectional view of the socket according to the embodiment of the present invention. FIG. 10 is a schematic view of the socket according to the embodiment of the present invention in a state before pressure is applied to a relatively thick inspection object. FIG. 11 is a schematic view of the socket according to the embodiment of the present invention in a state where pressure is applied to a relatively thick inspection object. FIG. 12 is a schematic view of the socket according to the embodiment of the present invention in a state before pressure is applied to a relatively thin inspection object. FIG. 13 is a schematic view of the socket according to the embodiment of the present invention in a state where pressure is applied to a relatively thin inspection object. FIG. 14 is a schematic view of a socket according to an embodiment of the present invention in a state of being erroneously operated. FIG. 15 is a schematic view of a socket according to an embodiment of the present invention in which the safety device is in a functioning state. FIG. 16 is a front view of a cam according to a modified example of the present invention.

The following will be described with reference to the drawings of the embodiments. In each drawing, for convenience of explanation, a three-dimensional Cartesian coordinate system including an X-axis, a Y-axis, and a Z-axis is drawn. The positive direction of the X axis is defined as the +X direction, the positive direction of the Y axis is defined as the +Y direction, and the positive direction of the Z axis is defined as the +Z direction (upward direction).

FIG. 1 is a perspective view of a socket 1 according to an embodiment of the present invention, and the details of which will be apparent from a later description, show the socket 1 in a pressurized state in which a pressure is applied to a device under test. .. The socket 1 is arranged on the wiring board 100.

The socket 1 includes a base 2, a cover 3, a latch portion 4, an object pressing member 5 (for example, a heat sink that also serves as a heat radiating member), a cam 6, a bail 7, a pressure plate 8, and the like.

The base 2 has a body portion 21 and a mounting portion 22 (see FIG. 5). The body portion 21 supports the cover 3 and the latch portion 4. Further, the body portion 21 is a frame member constituting the main body portion of the base 2.

The placing portion 22 is a member for placing an object to be inspected, and is surrounded by the body portion 21 (see FIG. 5). A plurality of contact pins (not shown) are provided on the mounting portion 22. The contact pin comes into contact with a connection terminal (not shown) arranged on the wiring board 100.

The cover 3 is a member that covers the socket 1 from above. The cover 3 has an accommodation hole 3a (see FIG. 8) in which a second spring 132 described later is accommodated, and an engaged portion 3b (see FIG. 7) with which the latch portion 4 engages. The cover 3 is rotatably fixed to the + Y direction side of the body portion 21 via the shaft 111. The operator of the socket 1 can open and close the cover 3 by rotating the cover 3 around the shaft 111. The cover 3 does not necessarily have to be rotatably fixed to the body portion 21. For example, the cover 3 may be detachably configured with respect to the body portion 21.

The latch portion 4 has an engaging portion 4a, and is rotatably fixed to the −Y direction side of the body portion 21 via a latch shaft 113 (see FIG. 7). The operator of the socket 1 can maintain the closed state of the cover 3 by rotating the latch portion 4 to engage the engaging portion 4a with the engaged portion 3b.

The inspection object pressing member 5 is a member for applying pressure from the +Z direction side to the inspection object placed on the placing part 22 during the inspection. When pressure is applied to the inspection object, the connection terminals provided on the inspection object and the connection terminals of the wiring board 100 are electrically connected via the contact pins of the mounting portion 22. Further, the inspection object pressing member 5 functions as a heat radiating member for removing heat from the inspection object under inspection and releasing the heat to the surroundings to keep the inspection object at a predetermined temperature.

As shown in FIG. 2 which is a perspective view of the object pressing member 5 to be inspected, the object pressing member 5 has a hard stop portion 51, a pressing portion 52 (see FIG. 5), a brim portion 53, and the like. The hard stop portion 51 is a portion pushed by the cam 6 due to the rotation of the cam 6. The hard stop unit 51 will be described in detail later. The pressurizing unit 52 is a portion that comes into contact with the object to be inspected when pressure is applied to the object to be inspected.

Refer to FIG. 1 again. Two cams 6 are arranged on both sides of the object pressing member 5 to be inspected. The cam 6 is a member that rotates around the rotation axis O and presses the inspection object pressing member 5 toward the mounting portion 22. As shown in FIG. 3, which is a front view of the cam 6, the cam 6 has a first pressing surface 61, a second pressing surface 62, a non-pressing surface 63, a flank surface 64, and the like.

The cam 6 has a plurality of side surfaces parallel to the rotation axis O, that is, a first pressing surface 61, a second pressing surface 62, a non-pressing surface 63, a flank surface 64, and the like. The rotation axis O is parallel to the X-axis direction.

The first pressing surface 61 is one side surface of the cam 6, and is located on the −Y direction side with respect to the rotation axis O. The second pressing surface 62 is located on the +Y direction side with respect to the rotation axis O and on the −X direction side with respect to the first pressing surface 61. The first pressing surface 61 and the second pressing surface 62 are parallel to each other.

The non-pressing surface 63 is a side surface (bottom surface of the cam 6 in FIG. 3) different from the first pressing surface 61 and the second pressing surface 62 of the cam 6. The non-pressing surface 63 is perpendicular to the first pressing surface 61 and the second pressing surface 62.

The curved surface 63a connects the first pressing surface 61 and the non-pressing surface 63, and the curved surface 63b connects the second pressing surface 62 and the non-pressing surface 63.

The flank surface 64 is a side surface of the cam 6 located on the +Y direction side with respect to the rotation axis O and on the +X direction side of the second pressing surface 62. Although not shown in FIG. 3, the cam 6 has a flank surface 65 located on the −Y direction side with respect to the rotation axis O and on the −X direction side with respect to the first pressing surface 61 (see FIG. 5). )have.

A shaft hole 66 is formed in the cam 6 along the X axis. The shaft hole 66 is a hole through which the shaft 112 (FIG. 5) is inserted. Here, the distance x1 from the rotation axis O to the first pressing surface 61 and the distance x2 from the rotation axis O to the second pressing surface 62 are equal to each other. On the other hand, the distance x3 from the rotation axis O to the non-pressing surface 63 is shorter than the distance x1 and the distance x2.

As will be described in detail later, when the cam 6 is in the posture shown in FIG. 3, that is, when the non-pressing surface 63 is downward, the cam 6 does not press the object pressing member 5, so that the object to be inspected is pressed. The member 5 does not pressurize the object to be inspected. Therefore, hereinafter, this state will be referred to as a non-pressurized state. In the non-pressurized state, the bail 7 is upright with respect to the mounting portion 22 (see FIGS. 10 and 12).

Refer to FIG. 1 again. The bail 7 is connected to two cams 6 and functions as a knob when rotating the cam 6.

The pressure plate 8 is a member that is supported by the cover 3 and also supports the member to be inspected pressing member 5 and the cam 6. The pressure plate 8 is a member that functions as a safety device for the socket 1.

As shown in FIG. 4, which is a perspective view of the pressure plate 8, the pressure plate 8 has two cam holding portions 81, a plurality of first spring arranging portions 82, a plurality of second spring arranging portions 83, and the like.

Each cam holding portion 81 has two protruding

portions

81a and 81b. The

protrusions

81a and 81b are parallel to each other and protrude from the upper surface 8a of the pressure plate 8 in the +Z direction. A cam 6 is inserted between the

protrusions

81a and 81b. A shaft hole through which the shaft 112 is inserted is formed in the

protrusions

81a and 81b along the X-axis. Further, a hard stop insertion hole 81c through which the hard stop portion 51 is inserted is formed in the cam holding portion 81 along the Z axis.

The first spring 131 is arranged in the first spring arrangement portion 82 (see FIG. 7), and the second spring 132 is arranged in the second spring arrangement portion 83 (see FIG. 8). Guide pin through holes 82a (see FIG. 7) and 83a are formed in the first spring arrangement portion 82 and the second spring arrangement portion 83, respectively, along the Z axis.

FIG. 5 is a diagram showing a part of the cross-sectional view taken along the line AA shown in FIG. Further, FIG. 6 is a cross-sectional view taken along the line BB shown in FIG. 5 and 6 show a state (pressurized state) in which the relatively thick inspected body S1 is placed on the placing portion 22 and pressure is applied to the inspected body S1.

The hard stop portion 51 is inserted into the hard stop insertion hole 81c. The hard stop portion 51 has a first pressed surface 51a and a second pressed surface 51b. The second pressed surface 51b is located closer to the mounting portion 22 than the first pressed surface 51a. In other words, the second pressed surface 51b is located on the −Z direction side of the first pressed surface 51a. Further, a stepped shape is formed by the first pressed surface 51a and the second pressed surface 51b, and the distance from the first pressed surface 51a to the second pressed surface 51b is g1. Both the first pressed surface 51a and the second pressed surface 51b are flat surfaces.

The cam 6 is arranged between the protruding

portions

81 a and 81 b of the cam holding portion 81, and is rotatably attached to the pressure plate 8 by the shaft 112. The first pressing surface 61 contacts the first pressed surface 51a and presses the inspection object pressing member 5 when the cam 6 rotates around the shaft 112 by the first angle from the non-pressurized state. The second pressing surface 62 contacts the second pressed surface 51b and presses the inspection object pressing member 5 when the cam 6 rotates about the shaft 112 by the second angle from the non-pressurized state. In this embodiment, the value of the second angle is a negative value of the first angle.

More specifically, the second pressing surface 62 comes into contact with the second pressed surface 51b when the cam 6 rotates 90 degrees clockwise around the shaft 112 from the non-pressurized state, and contacts the object pressing member 51b. Press 5. The state at this time is shown in FIG. Further, as will be described later with reference to FIG. 9, the first pressing surface 61 is the first pressed surface when the cam 6 rotates 90 degrees around the shaft 112 and counterclockwise from the non-pressurized state. It comes into contact with the surface 51a and presses the object pressing member 5. As described above, when the state of the cam 6 shown in FIG. 3 is set to a rotation angle of 0 degree, the first angle is 90 degrees counterclockwise and the second angle is 90 degrees clockwise (counterclockwise). It is -90 degrees clockwise). Hereinafter, the state in which the cam 6 is rotated 90 degrees counterclockwise around the shaft 112 from the non-pressurized state is referred to as “0 degree state”, and the state of the cam 6 in the non-pressurized state is referred to as “90 degree state”. .. Further, a state in which the cam 6 is rotated 90 degrees clockwise around the shaft 112 from the non-pressurized state is referred to as a "180 degree state".

The flank 64 is adjacent to the second pressing surface 62 and forms a step shape together with the second pressing surface 62. Here, the distance from the second pressing surface 62 to the flank surface 64 is larger than g1. Therefore, when the second pressing surface 62 comes into contact with the second pressed surface 51b, a gap is formed between the flank surface 64 and the second pressed surface 51b. The flank 65 forms a staircase shape together with the first pressing surface 61 adjacent to the first pressing surface 61.

The orthographic projection of the first pressing surface 61 onto the base 2 is located on the upper surface of the portion 21a shown in FIG. The orthographic projection of the second pressing surface 62 onto the base 2 is located on the upper surface of the portion 21b shown in FIG. Here, the first pressing surface 61 and the second pressing surface 62 are displaced in the X-axis direction of the cam 6. That is, the cam 6 has a two-stage structure. Therefore, the orthogonal projections of the first pressing surface 61 and the second pressing surface 62 on the base 2 do not overlap with each other. The orthogonal projection of the first pressing surface 61 appears on the + X direction side with respect to the orthogonal projection of the second pressing surface 62. The relationship in which the orthographic projections of the first pressing surface 61 and the second pressing surface 62 do not overlap each other is maintained regardless of the rotation angle around the rotation axis O.

In the pressurized state, the second pressing surface 62 is in contact with the second pressed surface 51b. This contact is a contact between planes. Therefore, the operator of the socket 1 operates the bail 7 so as to be in the pressurized state shown in FIGS. 5 and 6, and then moves the bail 7 in order to prevent the bail 7 from returning to the non-pressurized state. There is no need to perform the fixing operation. Further, it is not necessary to provide the socket 1 with a mechanism for preventing the cam 6 from rotating.

FIG. 7 is a cross-sectional view taken along the line CC shown in FIG.

A guide pin 121 is fixed to the brim portion 53. The guide pin 121 penetrates a guide pin through hole 82a formed in the pressure plate 8 along the Z-axis direction. A first spring 131, which is a compression spring, is arranged in the first spring arrangement portion 82 so as to surround the guide pin 121. The first spring 131 is arranged in a compressed state between the upper surface of the first spring arrangement portion 82 and the lower surface of the head portion of the guide pin 121. Therefore, the first spring 131 exerts a repulsive force so as to press the upper surface of the flange portion 53 of the inspection object pressing member 5 against the lower surface of the pressure plate 8. In other words, the inspection body pressing member 5 is supported by the pressure plate 8 so as to be lifted up via the first spring 131 and the guide pin 121.

FIG. 8 is a cross-sectional view taken along the line DD shown in FIG.

Guide pins 122 are fixed to the cover 3. The guide pin 122 penetrates the guide pin through hole 83a formed in the pressure plate 8. The pressure plate 8 is supported by the cover 3 so that it can be lifted via the guide pin 122. A second spring 132, which is a compression spring, is arranged between the cover 3 and the pressure plate 8. More specifically, the second spring 132 is arranged in the second spring arrangement portion 83 so as to surround the guide pin 122 and be accommodated in the accommodation hole 3a. The second spring 132 is arranged in a compressed state between the upper surface of the second spring arrangement portion 83 and the upper surface of the accommodation hole 3a. Therefore, the second spring 132 exerts a repulsive force so as to separate the pressure plate 8 from the cover 3. In other words, the second spring 132 urges the pressure plate 8 away from the cover 3. The pressure plate 8 can move relative to the cover 3 in the Z-axis direction.

FIG. 9 is a view showing a part of a vertical cross-sectional view of the socket 1 in another pressurization state different from the pressurization state shown in FIGS. 5 and 6. Specifically, in FIG. 9, the bail 7 is operated so as to tilt to the opposite side (−Y direction side) from the state shown in FIG. 1, and the cam 6 is operated from the non-pressurized state around the shaft 112 and counterclockwise. 2 is a part of a cross-sectional view corresponding to the cross-sectional view taken along the line AA in FIG. 1 in a state where it is rotated 90 degrees around (0-degree state).

FIG. 9 shows a state (pressurized state) in which the inspection target S2 thinner than the inspection target S1 is placed on the mounting portion 22 and pressure is applied to the inspection target S2. .. In the state shown in FIG. 9, the first pressed surface 51a and the first pressing surface 61 are in contact with each other. The first pressed surface 51a is g1 away from the mounting portion 22 than the second pressed surface 51b. When the cam 6 rotates around the shaft 112 and counterclockwise from the non-pressurized state (0 degree state), and when the cam 6 rotates around the shaft 112 and clockwise from the non-pressurized state (180 degrees). Compared to the state), the moving distance of the object pressing member 5 from the non-pressurized state is g1 larger. Therefore, when the bail 7 is tilted from the non-pressurized state to the + Y direction side, the socket 1 can inspect the relatively thick object S1 to be inspected, and the bail 7 can be inspected from the non-pressurized state to the −Y direction side. When it is knocked down, it is possible to inspect the inspected body S2 which is g1 thinner than the inspected body S1.

It is necessary to perform the operation of fixing the bail 7 even in the state shown in FIG. 9, that is, in the state where the cam 6 is rotated 90 degrees counterclockwise around the shaft 112 (0 degree state) from the non-pressurized state. Absent.

CAM 6 has the following shape. That is, the part on the +X direction side with respect to the center in the X axis direction has the same shape as the part on the −X direction side. Therefore, even if the cam 6 is arranged so that the second pressing surface 62 is located on the + X direction side with respect to the first pressing surface 61, the cam 6 has exactly the same posture as shown in FIGS. 1 and 5. Become a posture. Therefore, it is not necessary to pay attention to the direction of the cam 6 when connecting the cam 6 to the bail 7, and the socket 1 can be easily manufactured. Here, the +X direction side portion and the −X rear side portion do not necessarily have to have the same shape, and may satisfy the following (1)-(4). (1) The distance x1 is equal to the distance x2. (2) The orthogonal projections of the first pressing surface 61 and the second pressing surface 62 on the base 2 do not overlap each other. (3) The distance from the first pressing surface 61 to the flank 65 is larger than g1. (4) The distance from the second pressing surface 62 to the flank 64 is larger than g1.

Next, the pressurizing operation of the socket 1 will be described. First, a pressurizing operation for a relatively thick inspection object S1 having a thickness d1 will be described with reference to FIGS. 10 and 11.

FIG. 10 is a schematic view of the socket 1 according to the embodiment of the present invention in a state before pressure is applied to the relatively thick inspection object S1. That is, FIG. 10 shows the socket 1 in the non-pressurized state. In the non-pressurized state, the bail 7 stands upright with respect to the mounting portion 22.

In this state, the non-pressed surface 63 of the cam 6 is in contact with the first pressed surface 51a. Further, the first spring 131 urges the object pressing member 5 to be inspected in a direction approaching the cover 3 (+ Z direction). Further, the second spring 132 urges the pressure plate 8 in a direction away from the cover 3 (−Z direction). Therefore, the pressure plate 8 is positioned with the lower surface of the pressure plate 8 pressed against the lower surface of the head portion of the guide pin 122.

When the operator tilts the bail 7 to the +Y direction side, the cam 6 rotates around the shaft 112 and clockwise. Then, the curved surface 63b comes into contact with the second pressed surface 51b. At this time, the pressure plate 8 does not move. Further, the second pressed surface 51b is pressed by the curved surface 63b, and the pressurizing portion 52 moves in the −Z direction and approaches the placing portion 22. As the pressurizing portion 52 approaches the mounting portion 22, the first spring 131 contracts.

Further, when the bail 7 is tilted toward the + Y direction and the rotation angle of the cam 6 from the non-pressurized state reaches 90 degrees (the cam 6 is in the state of 180 degrees), as shown in FIG. 11, the second The pressing surface 62 comes into contact with the second pressed surface 51b. Further, the pressurizing portion 52 comes into contact with the inspection object S1 and the pressure is applied to the inspection object S1. Therefore, the connection terminal of the inspection object S1 and the connection terminal of the wiring board 100 are electrically connected via the contact pins of the mounting portion 22, and the inspection of the inspection object S1 can be performed.

Subsequently, a pressurizing operation on a relatively thin inspected object S2 having a thickness d2 (d2 <d1) g1 thinner than the inspected object S1 (thickness d1) will be described with reference to FIGS. 12 and 13.

FIG. 12 is a schematic diagram of the socket 1 according to the embodiment of the present invention in a state before pressure is applied to the relatively thin inspection object S2. The only difference from the state shown in FIG. 10 is that the object to be inspected S2 is placed on the mounting portion 22, and the states of the cam 6, bail 7, first spring 131 and second spring 132. There is no difference.

When pressure is applied to the inspected body S2, since the inspected body S2 is thinner than the inspected body S1, it is necessary to move the pressurizing portion 52 closer to the mounting portion 22 (toward the −Z direction). Therefore, the operator tilts the bail 7 in the −Y direction from the non-pressurized state.

When the operator tilts the bail 7 toward the −Y direction, the cam 6 rotates around the shaft 112 and counterclockwise. Then, the curved surface 63a comes into contact with the first pressed surface 51a. At this time, the pressure plate 8 does not move. In addition, the first pressed surface 51 a is pressed by the curved surface 63 a, the pressing portion 52 moves in the −Z direction, and approaches the mounting portion 22. As the pressurizing portion 52 approaches the mounting portion 22, the first spring 131 contracts.

Further, when the bail 7 is tilted toward the −Y direction and the rotation angle of the cam 6 from the non-pressurized state reaches 90 degrees (the cam 6 becomes a state of 0 degrees), as shown in FIG. 13, the first The pressing surface 61 of the above comes into contact with the first pressed surface 51a. Further, when the cam 6 is rotated 90 degrees counterclockwise around the shaft 112 (the cam 6 is in the state of 0 degrees), the position is farther from the mounting portion 22 than the second pressed surface 51b. The first pressed surface 51a to be pressed is pressed by the first pressing surface 61. Therefore, the moving distance of the object pressing member 5 to be inspected is the moving distance of the object pressing member 5 to be inspected when the cam 6 is rotated 90 degrees clockwise around the shaft 112 (the cam 6 is in a state of 180 degrees). It is g1 longer than the travel distance. Therefore, as shown in FIG. 13, the pressurizing unit 52 comes into contact with the inspection object S2 that is thinner than the inspection object S1 by g1 and the pressure is applied to the inspection object S2. Therefore, the connection terminal of the inspection object S2 and the connection terminal of the wiring board 100 are electrically connected via the contact pin of the mounting portion 22, and the inspection of the inspection object S2 can be performed.

As described above, when the operator inspects the object to be inspected S1, it is necessary to tilt the bail 7 toward the + Y direction as described above, but the operator accidentally tilts the bail 7 toward the −Y direction. In that case, the socket 1 operates as follows.

As shown in FIG. 10, when the operator S1 tilts the bail 7 toward the −Y direction from the non-pressurized state in the state where the inspected object S1 is mounted on the mounting portion 22, the cam 6 moves around the shaft 112. And it rotates counterclockwise. Then, the curved surface 63a comes into contact with the first pressed surface 51a. Then, the pressurizing portion 52 moves in the −Z direction and approaches the mounting portion 22. Further, as the pressurizing portion 52 approaches the mounting portion 22, the first spring 131 contracts.

Eventually, as shown in FIG. 14, the pressurizing unit 52 comes into contact with the inspected object S1.

When the bail 7 is further tilted to the −Y direction side, the inspected body pressing member 5 cannot be pushed down, so the cam 6 itself starts moving in the +Z direction. Since the cam 6 is attached to the pressure plate 8, the pressure plate 8 also moves in the +Z direction as the cam 6 moves. At this time, the second spring 132 sandwiched between the pressure plate 8 and the cover 3 shrinks. Such an operation of each part of the socket 1 continues until the bail 7 is tilted 90 degrees toward the −Y direction (until the state shown in FIG. 15 is reached).

During this time, the inspection object pressing member 5 does not move. Further, the force applied to the inspection object S1 is a combined force of the repulsive forces of the plurality of second springs 132 at the maximum. Therefore, by setting the natural length and elastic modulus of the second spring 132 to appropriate values, it is possible to prevent the inspected body S1 from being damaged by applying an excessive force (pressure) to the inspected body S1. .. That is, the pressure plate 8 and the second spring 132 also function as safety devices.

As described above, according to the present embodiment, the distance between the pressurizing portion 52 and the mounting portion 22 can be adjusted by rotating the cam 6 having a plurality of pressing surfaces, so that a plurality of types of thicknesses can be used. The object to be inspected can be inspected with a single device.

Since both the pressing surface of the cam 6 and the pressed surface of the hard stop portion 51 are flat surfaces, the contact state can be stably maintained as compared with the contact between curved surfaces and flat surfaces or curved surfaces. Therefore, the work for fixing the rotation of the cam 6 is not required to maintain the contact state.

Therefore, the height of the member (inspection body pressing member 5) for applying pressure to the inspection body from the mounting portion 22 can be easily switched.

The cam 6 has a two-step structure in which the first pressing surface 61 and the second pressing surface 62 are displaced from each other in the X-axis direction. Further, the distance x1 and the distance x2 are equal to each other. Further, the hard stop portion 51 of the inspection object pressing member 5 has a first pressed surface 51a and a second pressed surface 51b which are different in distance from the mounting portion 22. Therefore, the distance between the first pressed surface 51a and the second pressed surface 51b of the hard stop portion 51 is the moving distance of the inspected body pressing member 5 in the −Z direction according to the rotation direction of the cam 6. Corresponds to the difference. Therefore, if the distance between the first pressed surface 51a and the second pressed surface 51b is set to a predetermined distance, when the cam 6 is manufactured, the distance x1 and the distance x2 are different from each other. It is not necessary to make the length according to the thickness of the product or to perform secondary processing. Therefore, the cam 6 can be easily manufactured and the secondary processing cost can be reduced. Specifically, the cam 6 can be manufactured as a molded product, and the manufacturing cost can be reduced.

Also, the cam 6 has a two-stage structure, and the pressed surface of the hard stop portion 51 contacting the pressing surface of the cam 6 is switched depending on the direction in which the cam 6 is rotated. Therefore, it is possible to prevent early wear of the pressed surface.

Further, since the moving distance of the object pressing member 5 to be inspected can be changed depending on the direction in which the cam 6 is rotated, the operator can change the direction in which the bail 7 is tilted, and the operator has two inspected objects having different thicknesses by a simple operation. The body examination can be carried out in a single socket 1.

Further, when the operator erroneously performs an operation to pressurize the thin inspection object when inspecting the thick inspection object, the cam 6 is pressed after the inspection object pressing member 5 contacts the inspection object. And the pressure plate 8 moves in the direction away from the mounting portion 22 (+ Z direction). Therefore, it is possible to prevent the inspected body and the socket 1 from being damaged by applying excessive pressure to the inspected body.

Although the socket 1 according to the embodiment of the present invention has been described above, the socket 1 may be modified as described below.

The positional relationship among the first pressing surface 61, the second pressing surface 62, and the non-pressing surface 63 of the cam 6 may not be the relationship shown in FIG. 3, for example, the cam 6 is as shown in FIG. It may have a shape. In FIG. 16, the second pressing surface 62 is parallel to the non-pressing surface 63. Further, it is located on the + Z direction side of the rotation axis O and on the −X direction side of the flank surface 64. On the other hand, the first pressing surface 61 is perpendicular to the second pressing surface 62 and the non-pressing surface 63. When the cam 6 has the shape shown in FIG. 16, when the cam 6 rotates around the rotation axis O and in the clockwise direction, the first pressing surface 61 contacts the first pressed surface 51a, and the cam 6 further rotates. When rotated about the axis O and clockwise, the second pressing surface 62 comes into contact with the second pressing surface 62. For the distance x1 from the rotary shaft O to the first pressing surface 61, the distance x2 from the rotary shaft O to the second pressing surface 62, and the distance x3 from the rotary shaft O to the non-pressing surface 63, x3<x1< There is a relationship of x2 and x1 + 2g1 <x2.

In this case, the state in which the bail 7 is tilted toward the −Y direction (here, the cam 6 is in the 0 degree state) is the non-pressurized state, and the bail 7 is upright with respect to the mounting portion 22. Indicates a state for inspecting the inspection object S1, and a state in which the bail 7 is tilted in the +Y direction side is a state for inspecting the inspection object S2. In other words, the inspection object S1 is inspected when the cam 6 is rotated around the rotation axis O and 90 degrees clockwise (the cam 6 is 90 degrees) from the non-pressurized state (the cam 6 is 0 degree). It is a state to do. Further, a state in which the state further rotated by 90 degrees in the clockwise direction around the rotation axis O (the state in which the cam 6 is 180 degrees) is a state for inspecting the inspection object S2. As described above, by making the moving distance of the inspection object pressing member 5 change according to the size of the angle of rotating the cam 6 in one direction, the operator may make a mistaken operation in which the bail 7 is tilted in the wrong direction. There is nothing to do.

Further, in the cam 6, the distance x1 from the rotation axis O to the first pressing surface 61 and the distance x2 from the rotation axis O to the second pressing surface 62 may have different lengths. It suffices that the distance from the second pressing surface 62 to the second pressed surface 51b and the distance from the first pressed surface 51a to the second pressed surface 51b be larger than g1.

Further, the object pressing member 5 to be inspected may have three or more pressed surfaces, and the cam 6 may also have three or more pressing surfaces. For example, the inspected member pressing member 5 further has a third pressed surface located closer to the base 2 (-Z direction) than the second pressed surface 51b, and the cam 6 rotates around the rotation axis O. It may further have a third pressing surface that comes into contact with the third pressed surface when rotated by a predetermined angle. By doing so, it is possible to inspect an object to be inspected having a thickness of more than two types with a single socket 1.

Note that the cam 6 does not necessarily have the shape shown in FIGS. 3, 5, 16 and the like, and for example, the cam 6 does not have to have the flank surface 65. That is, the first pressing surface 61 may be formed from the vicinity of the end of the cam 6 on the +X direction side to the vicinity of the end of the cam 6 on the −X direction side.

Further, the first pressing surface 61 and the second pressing surface 62 are formed on the cam 6 so that the orthogonal projections of the first pressing surface 61 and the second pressing surface 62 on the base 2 overlap each other. May be. For example, the dimension of the flank surface 65 in the X-axis direction is shorter than the dimension of the flank surface 65 in the X-axis direction shown in FIGS. 5 and 10, and the dimension of the first pressing surface 61 in the X-axis direction is It may be longer than the dimension of the first pressing surface 61 shown in FIGS. 5 and 10 in the X-axis direction. In other words, in the vicinity of the center position of the cam 6 in the X-axis direction, the cam 6 is arranged so that the second pressing surface 62 is located on the +Y direction side and the first pressing surface 61 is located on the −Y direction side. It may be configured. When a cam 6 having this shape is used, the object pressing member 5 having the hard stop portion 51 shown in FIGS. 2 and 5 may be used.

<Note>
In addition, each of the above embodiments is merely an example of embodiment in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

This application claims priority based on Japanese Patent Application No. 2019-040391 filed on Mar. 6, 2019. All the contents described in these application specifications and drawings are incorporated herein by reference.

The present invention is suitably used as a socket for inspecting electronic components.

1 Socket 2 Base 3 Cover 3a Accommodating hole 3b Engagement part 4 Latch part 4a Engagement part 5 Inspected object pressing member 6 Cam 7 Vail 8 Pressure plate 8a Top surface 21

Body part

21a, 21b Part 22 Mounting part 51 Hard stop Part 51a First pressed surface 51b Second pressed surface 52 Pressurized part 53 Brim part 61 First pressed surface 62 Second pressed surface 63

Non-pressed surface

63a, 63b

Curved surface

64, 65 Escape surface 66 Shaft hole 81

Cam holding part

81a, 81b Protruding part 81c Hard stop insertion hole 82 1st spring arrangement part 83 2nd

spring arrangement part

82a, 83a Guide pin through hole 100

Wiring board

111, 112 Shaft 113

Latch shaft

121, 122 Guide pin 131 1 spring 132 2nd spring S1, S2 DUT O rotation axis

Claims

With the base
An inspected member pressing member having a first pressed surface and a second pressed surface positioned closer to the base than the first pressed surface;
A cam that presses the inspection object pressing member toward the base,
The cam has a first pressing surface that comes into contact with the first pressed surface when rotated by a first angle around the rotation axis from the reference posture, and a second angle around the rotation axis from the reference posture. A second pressing surface which comes into contact with the second pressed surface when rotated,
socket.
A distance from the rotating shaft to the first pressing surface is equal to a distance from the rotating shaft to the second pressing surface,
The socket according to claim 1.
The socket according to claim 1 or 2, wherein the value of the second angle is a negative value of the value of the first angle.
The orthogonal projection of the first pressing surface onto the base does not overlap the orthogonal projection of the second pressing surface onto the base, regardless of the rotation angle of the cam around the rotation axis.
The socket according to any one of claims 1 to 3.
The cam further has a flank surface adjacent to the second pressing surface and forming a step shape with the second pressing surface,
A distance from the second pressing surface to the flank is larger than a distance from the first pressed surface to the second pressed surface,
The socket according to any one of claims 1 to 4.
The cover fixed to the base and
A pressure plate that can move relative to the cover and
A spring disposed between the cover and the pressure plate and biasing the pressure plate in a direction away from the cover;
The inspection object pressing member and the cam are supported by the pressure plate,
The socket according to any one of claims 1 to 5.
The inspected member pressing member further has a third pressed surface located closer to the base than the second pressed surface,
The cam further has a third pressing surface that comes into contact with the third pressed surface when rotated by a third angle about the rotation axis.
The socket according to any one of claims 1 to 6.