JP2015125971A - Socket for electrical component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for an electrical component whose upper side contact part is hard to be deviated in the direction due to rotation of a contact pin and lower side contact part is hard to be inclined and suspended.SOLUTION: In an upper side contact member 16 of a contact pin 14, an upper side contact part 16a is provided whose horizontal cross-section has a substantially rectangular shape. Moreover, when the contact pin 14 is rotated in a state where the upper side contact part 16a is inserted through, an opening recess 21c of the upper side plate is formed so that rotation is prevented by abutting this upper side contact part 16a on the opening recess 21c. Then, in a lower side contact member 17 of the contact pin 14, an engaging part 17b is formed which is engaged with a peripheral edge part 20c of an insertion hole 20b while a lower surface part 16c of a cylinder part 16b of the upper side contact member 16 is separated upward from a bottom surface part 20a by a predetermined amount L1 and floated up, in a state before a socket body 13 is arranged and installed on a wiring board.

Description

  The present invention relates to a socket for an electrical component that is disposed on a wiring board and accommodates the electrical component in order to conduct a continuity test of the electrical component such as a semiconductor device (hereinafter referred to as “IC package”).

  Conventionally, as this type of electrical component socket, there is an IC socket for conducting a continuity test of an IC package.

  The IC socket has a socket body disposed on the wiring board, and an IC package is accommodated in the socket body. The IC socket is provided with a plurality of contact pins in order to contact the terminals of the IC package and the electrodes of the wiring board to electrically connect them (for example, see Patent Document 1).

  The IC socket of Patent Document 1 uses a so-called one-end sliding contact pin as shown in FIG. The one-end sliding contact pin has a cylindrical main body part integrally formed with the upper contact part, and the lower contact part is telescopically inserted into the cylindrical main body part, and a coil spring is arranged in the main body part. Thus, the contact pin is urged in the direction of separating the upper contact portion and the lower contact portion. By using the one-end sliding contact pin, the electrical resistance can be stabilized and a highly reliable test can be performed.

  Further, in the IC socket of Patent Document 1, as shown in FIG. 1 and the like, the tip portion of the upper contact portion provided on the contact pin is formed in a mountain shape having a ridge line, and the apex is used as a terminal of the IC package. Make contact. Then, as shown in FIG. 5 and the like, the horizontal cross-sectional shape of the central portion of the upper contact portion and the horizontal cross-sectional shape of the upper insertion hole that passes through the upper contact portion are both formed into a rectangular shape, thereby forming a contact pin. The rotation of the is regulated. With such a configuration, it is possible to prevent the contact pin from being misaligned and to contact the terminals of the IC package correctly.

JP 2010-38837 A

  In the one-end sliding contact pin as described above, it is desirable to make the coil spring as long as possible in order to ensure sufficient contact pressure with respect to the terminal of the IC package and the electrode of the wiring board.

  And in order to lengthen a coil spring, it is desirable to make an upper side contact part as short as possible.

  However, if the coil spring is lengthened to improve the contact pressure, it is necessary to lengthen the lower contact member. For this reason, when this IC socket is disposed on the wiring board, the lower contact member hangs down and tilts, and may not contact the electrodes of the wiring board correctly. Further, if the IC socket is forcibly arranged on the wiring board with the lower contact member tilted, the lower contact member may be bent. Such inconvenience tends to occur particularly when the contact pins are arranged at a narrow pitch.

  If the upper contact portion is shortened, when the IC socket is disposed on the wiring board, the upper contact portion may be lowered and fall out of the upper insertion hole. In such a case, it is not easy to insert the upper contact portion through the plunger insertion hole again in a state where the direction is set correctly.

  Therefore, an object of the present invention is to provide an electrical component socket in which the upper contact portion is unlikely to fall out of the upper insertion hole or the lower contact portion is inclined and hangs down.

  In order to achieve this object, the invention of claim 1 is provided on a wiring board, and a socket body in which an electrical component on which a terminal is formed is accommodated on the upper surface side, and the socket body. A contact pin that contacts the terminal of the electrical component and the electrode of the wiring board and electrically connects the terminal of the electrical component and the electrode of the wiring board, and the contact pin is formed at an upper portion. And an upper contact member having an upper contact portion that contacts a terminal of the electrical component, a cylindrical portion formed on a lower side of the upper contact portion, and a lower side of the cylindrical portion of the upper contact member. A lower contact member having a lower contact portion in contact with an electrode of the wiring board at a lower end, and a lower contact member disposed in a cylindrical portion of the upper contact member, the upper contact member and the lower contact member For urging them in directions away from each other The socket body includes an upper plate provided with an upper insertion hole through which the upper contact portion of the upper contact member is inserted so as to freely move up and down, and the lower contact member moves up and down from the upper side. A lower plate having a lower insertion hole that is freely inserted, and the upper insertion hole is formed with a rotation blocking portion that prevents rotation of the contact pin in a state where the upper contact portion is inserted. And the lower contact member is configured to prevent the upper contact member from slipping downward from the rotation preventing portion in a state before the socket body is disposed on the wiring board. An engaging portion that engages with a peripheral edge portion of the lower insertion hole is formed.

  According to a second aspect of the present invention, in addition to the configuration according to the first aspect, the lower contact member has a cylindrical shaft portion, and the shaft portion includes a large-diameter portion and a lower portion formed in an upper portion. The locking portion is configured by a step portion between the large diameter portion and the small diameter portion.

  According to a third aspect of the present invention, in addition to the structure of the first or second aspect, the biasing means is a coil spring provided in an elastic manner in the cylindrical portion of the upper contact member, One end is in contact with the upper contact portion, and the other end is in contact with the lower contact member.

  According to the present invention, since the locking portion is provided, the lower surface portion of the cylindrical portion is spaced apart from the upper opening of the lower through hole by a predetermined amount before the socket body is disposed on the wiring board. It can be lifted and locked. For this reason, according to this invention, it can prevent that the upper side contact part of a contact pin falls and falls out from an upper side insertion hole, and the direction of this upper side contact part shifts | deviates. Furthermore, by providing this locking portion, it is possible to reduce the amount of downward protrusion of the lower contact member from the socket body, and as a result, the tip of the lower contact member comes off the electrode of the wiring board, It is possible to prevent the lower contact member from being bent.

It is a top view which shows the socket main body of the IC socket which concerns on Embodiment 1 of this invention. It is a perspective view which shows the AA cross section of FIG. It is a fragmentary sectional view of the IC socket which concerns on Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the contact pin which concerns on Embodiment 1 of this invention, Comprising: (a) is a front view which shows the state extended to the maximum, (b) is a left view which shows a contracted state, (c) is The arrow B view of the upper contact part of the upper contact member of (a), (d) is the arrow C view of the lower contact part and shaft part of the lower contact member of (a). It is sectional drawing which shows the attachment procedure of IC socket shown in FIG. 1, (a) is a figure which shows the state before an IC socket is arrange | positioned on a wiring board, (b) is an IC socket on a wiring board. The figure which shows the state arrange | positioned, (c) is a figure which shows the state in which the IC package was accommodated in the IC socket further.

  1 to 5 show a first embodiment of the present invention.

  First, the configuration will be described. Reference numeral 11 denotes an IC socket as an “electrical component socket”, and this IC socket 11 is arranged on the wiring board 15 (see FIG. 5B). In order to perform a burn-in test and test by Kelvin connection (4-terminal connection) such as an IC package 12 (see FIG. 5C) which is an “electrical component”, a plurality of terminals 12b of the IC package 12 and its The electrical connection with a plurality of pairs of electrodes 15a of the wiring board 15 is intended. When performing a burn-in test and a test using Kelvin connection, one electrode 15a of each pair of electrodes 15a serves as a sense terminal and the other electrode 15a serves as a force terminal.

  As shown in FIG. 5C, the IC package 12 has a flat package body 12a, and a plurality of terminals 12b are formed on the lower surface of the package body 12a. FIG. 5C shows only one terminal 12b among these terminals 12b.

  On the other hand, as shown in FIGS. 3 and 5C, the IC socket 11 is disposed on the wiring board 15, and the socket body 13 in which the IC package 12 is accommodated on the upper surface portion 13d side. Contact pins 14 disposed on the main body 13 and in contact with a plurality of terminals 12b of the IC package 12 and a plurality of pairs of electrodes 15a of the wiring board 15 to electrically connect the terminals 12b and the electrodes 15a. And have.

  As shown in FIGS. 1 to 3, the socket main body 13 includes a flat plate-like upper plate 19 and a lower plate 20 attached to the lower portion of the upper plate 19 at a predetermined interval.

  The upper plate 19 includes a plurality of first and second upper insertion portions 21 and 22.

  Each of the first upper insertion portions 21 includes a pair of upper insertion holes 21a and 21b, and an opening recess 21c as a “rotation prevention portion” that communicates with the upper ends of the insertion holes 21a and 21b. ing. Here, the insertion holes 21a and 21b are formed so that the horizontal cross section is substantially circular. On the other hand, as shown in FIGS. 1 and 2, the opening recess 21c is formed so that the horizontal cross section is substantially rectangular. In such a configuration, for example, by forming the upper insertion holes 21 a and 21 b from the lower surface side of the upper plate 19 by cutting using a drill or the like, the opening recess 21 c is formed from the upper surface side of the upper plate 19. Good. A cylindrical portion 16b (described later) of the upper contact member 16 provided in the contact pin 14 is inserted into the upper insertion holes 21a and 21b so as to be vertically movable from the lower side to the upper side. And the upper side contact part 16a (after-mentioned) of these upper side contact members 16 protrudes in the opening recessed part 21c.

  Moreover, the 2nd upper side insertion part 22 is respectively comprised by one insertion hole, as shown in FIG. These second upper insertion portions 22 are formed so that the horizontal cross section is substantially circular. The upper contact members 16 of the contact pins 14 are also inserted into the second upper insertion portions 22 so as to be movable up and down from the lower side to the upper side, respectively.

  As shown in FIGS. 2 and 3, the lower plate 20 is formed with first and second lower insertion portions 23 and 24. The first lower insertion portion 23 includes lower insertion holes 23a and 23b formed at positions corresponding to the upper insertion holes 21a and 21b of the upper plate 19, respectively. Through these lower insertion holes 23a and 23b, the upper contact member 16 and the lower contact member 17 of the corresponding contact pin 14 are inserted so as to be vertically movable from the upper side to the lower side.

  Further, each of the second lower insertion portions 24 is constituted by one insertion hole. These second lower insertion portions 24 are formed at positions corresponding to the second upper insertion portions 22 of the upper plate 19, and the upper contact member 16 and the lower contact member 17 of the corresponding contact pins 14 are formed from the upper side. It is inserted so that it can move up and down downward.

  The lower insertion holes 23a and 23b and the second lower insertion part 24 of the first lower insertion part 23 are large-diameter holes formed to have a large diameter so that the cylindrical part 16b of the contact pin 14 can be inserted. A small diameter hole portion 20d formed so that a small diameter portion 17e (described later) of a shaft portion 17c (described later) provided on the lower contact member 17 can be inserted but a large diameter portion 17d (described later) cannot be inserted. Have

  As shown in FIGS. 3 and 4, each contact pin 14 is formed at an upper portion, and is formed at an upper contact portion 16 a that contacts each terminal 12 b of the IC package 12 and below the upper contact portion 16 a. An upper contact member 16 having a tubular portion 16b, and a lower contact portion 17a that is disposed on the lower side of the tubular portion 16b of the upper contact member 16 so as to be movable up and down, and that contacts the respective electrodes 15a of the wiring board 15 at the lower end portion. The upper contact member 16 and the lower contact member 17 are arranged to be extendable and retractable within the cylinder portion 16b of the upper contact member 16 and urge the upper contact member 16 and the lower contact member 17 upward and downward. And a coil spring 18 as a biasing means.

  Here, as shown in FIG. 3, the upper contact portion 16a is fixed to the cylindrical portion 16b by inserting and caulking its base portion 16e into the cylindrical portion 16b.

  As shown in FIG. 4C, the upper contact portion 16a is formed so that the horizontal cross section is substantially rectangular. On the other hand, the cylinder part 16b is formed so that a horizontal cross section may be substantially circular.

  As shown in FIG. 3, a large-diameter annular stopper 16d is formed at a substantially central portion of the cylindrical portion 16b. Therefore, the upper contact member 16 is urged upward by the urging force of the coil spring 18, and the stopper 16 d comes into contact with and locks the lower surface 19 a of the upper plate 19. The upper contact portion 16a protrudes upward from the upper surface portion 13d of the socket body 13 by a predetermined amount L3.

  Moreover, as shown in FIG.3 and FIG.4, the lower side contact member 17 has the cylindrical axial part 17c, and the axial part 17c is formed in the large diameter part 17d formed in the upper part, and the lower part. The small-diameter portion 17e and the step portion 17b between the large-diameter portion 17d and the small-diameter portion 17e.

  The lower contact member 17 of each contact pin 14 has a lower surface portion 16c of the cylindrical portion 16b from the bottom surface portion 13a side of the socket body 13 in a state before the socket body 13 is disposed on the wiring board 15. A stepped portion 17b is formed as a locking portion that contacts and locks the entire circumference of the peripheral edge portion 20e of the insertion hole 20d while being lifted apart by a predetermined amount L1. Therefore, the protrusion amount L2 of the lower contact member 17 is reduced by an amount corresponding to the predetermined amount L1 as compared with the conventional product in which the step portion 17b is not formed on the lower contact member 17. The predetermined amount L1 is larger than the predetermined amount L3.

  As described above, in the first upper insertion portion 21, the upper contact portion 16a of the contact pin 14 and the opening recess 21c of the upper plate 19 are formed so that the horizontal cross section is substantially rectangular. And the length W (refer FIG. 1) of the short side of these opening recessed parts 21c is set sufficiently long compared with the length H (refer FIG. 4A) of the long side of the upper side contact part 16a. Yes. For this reason, even if the contact pin 14 tries to rotate in a state where the upper contact portion 16 is inserted into the opening recess 21c, the upper contact portion 16 contacts the opening recess 21c and cannot rotate. With such a configuration, normal contact with the terminal 12a of the IC package 12 can be ensured. Note that the horizontal cross-sectional shape of the upper contact portion 16 and the opening recess 21c is rectangular as long as the upper contact portion 16 contacts the opening recess 21c and prevents rotation when the contact pin 14 is about to rotate. It may be other than. Further, rotation of the contact pin may be prevented by a method different from the first embodiment.

  On the other hand, the second upper insertion portion 22 is configured so that the contact pin 14 can rotate. However, since the terminals (not shown) corresponding to the contact pins 14 of the second upper insertion portion 22 among the terminals of the IC package 12 are formed in a large area, regardless of the orientation of the contact pins 14, Normal contact is obtained.

  Next, a method of using the IC socket 11 will be described with reference to FIG.

  First, the IC socket 11 is disposed on the wiring board 15 from the state shown in FIG. Then, the contact pins 14 of the first and second upper insertion portions 21 and 22 rise against the urging force of the coil spring 18 in such a manner that the lower contact member 17 is pushed up to the wiring board 15. As a result, as shown in FIG. 5B, the lower contact portions 17 a of the two lower contact members 17 and the wiring board 15 in the contact pins 14 of the first and second upper insertion portions 21 and 22. The pair of electrodes 15a come into contact with each other with a predetermined contact pressure, and the two are electrically connected. Note that the upper contact member 16 of each contact pin 14 remains protruding from the upper surface portion 13d of the socket body 13 upward by a predetermined amount L3.

  At this time, the protruding amount L2 (see FIG. 5A) of the lower contact member 17 immediately before the IC socket 11 is disposed on the wiring board 15 is smaller than the conventional product as described above. The inclination angle of the lower contact member 17 is reduced. Therefore, even when a plurality of pairs of contact pins 14 are arranged at a narrow pitch, the tip end portion (lower contact portion 17a) of the lower contact member 17 is detached from the electrode 15a of the wiring board 15, or It is possible to suppress the side contact member 17 from being bent.

  Further, since the stepped portion 17b is provided, the contact pin 14 does not descend and the upper contact portion 16 does not fall out of the opening recess 21c before the IC socket 11 is disposed on the wiring board 15. Therefore, the upper contact portion 16a is not rotated and accurate contact with the terminal 12a of the IC package 12 is not impaired.

  Next, the IC package 12 is accommodated on the upper surface portion 13d side of the socket body 13 of the IC socket 11, and the IC package 12 is pressed downward by a pressing mechanism (not shown). Then, each contact pin 14 descends against the urging force of the coil spring 18 in such a manner that the upper contact member 16 is pushed down by the IC package 12. As a result, as shown in FIG. 5C, in each contact pin 14, the upper contact portion 16a of the two upper contact members 16 and one terminal 12b of the IC package 12 contact each other with a predetermined contact pressure. Thus, the two are electrically connected. As described above, in the first embodiment, since the upper contact member 16 does not fall out of the opening recess 21c before the IC socket 11 is disposed on the wiring board 15, the first upper insertion portion The upper contact member 16 of each contact pin 14 inserted into the terminal 21 is always set in a normal direction. Therefore, the upper contact portion 16a of the upper contact portion 16 can be correctly brought into contact with the terminal 12b of the IC package 12. it can. Note that all the lower contact members 17 of the contact pins 14 remain in the raised state.

  Further, at this time, the length that the coil spring 18 contracts with the accommodation of the IC package 12 can be made sufficiently large. Therefore, the urging force of the coil spring 18 at this time can be made sufficiently large. Therefore, a predetermined contact pressure is secured between the upper contact portion 16a of the upper contact member 16 and the terminal 12a of the IC package 12, and the lower contact portion 17a of the lower contact member 17 and the electrode 15a of the wiring board 15 A predetermined contact pressure can be ensured between the two.

  As described above, since the predetermined amount L1 of the IC socket 11 is larger than the predetermined amount L3, the lower surface portion 16c of the cylindrical portion 16b of the upper contact member 16 even if the IC package 12 is accommodated in the IC socket 11. There is no fear that the upper contact member 16 is prevented from descending by hitting the bottom surface portion 13a of the socket body 13.

  As a result, as shown in FIG. 3C, each terminal 12 a of the IC package 12 and each pair of electrodes 15 a of the wiring substrate 15 are brought into conduction with each other via each pair of contact pins 14.

  In this state, a current is passed through the IC package 12 to perform a burn-in test and a test using Kelvin connection.

  In such a case, the stepped portion 17b is used as the locking portion, and the stepped portion 17b contacts and locks the entire periphery of the peripheral edge portion 20e of the insertion hole 20d, so that the locking portion has a simple structure. Can be configured. Therefore, it becomes possible to manufacture the electrical component socket 11 having the above-described effects at a low cost.

Moreover, since the coil spring 18 provided in the cylinder part 16b of the upper side contact member 16 so that expansion-contraction is possible is used as a biasing means, a special structure is not requested | required of a biasing member. Therefore, it becomes possible to manufacture the electrical component socket 11 having the above-described effects at a lower cost.
[Other Embodiments of the Invention]
In the first embodiment, when the stepped portion 17b of the lower contact member 17 is used as a locking portion, that is, in a state before the socket body 13 is disposed on the wiring board 15, the lower contact member. A case has been described in which the 17 stepped portions 17b come into contact with and engage with the entire circumference of the peripheral edge portion 20e of the insertion hole 20d to lift the cylindrical portion 16b of the upper contact member 16. However, it is conceivable to form a locking portion other than the stepped portion 17b. For example, a part of the shaft portion 17c of the lower contact member 17 may be crushed to be larger than the insertion hole 20d, and this portion may be used as a locking portion.

  In the first embodiment, the case of performing the burn-in test and test by Kelvin connection has been described. However, the present invention can also be applied to the case of performing a burn-in test and test by an electrical connection method other than Kelvin connection. .

  Furthermore, in the first embodiment, the present invention is applied to the IC socket 11 as an “electrical component socket”. However, the present invention is not limited to this and can be applied to other devices.

11 IC socket (socket for electrical parts)
12 IC package (electrical parts)
12b terminal
13 Socket body
13a Bottom part
14 Contact pin
15 Wiring board
16 Upper contact member
16a Upper contact part
16b Tube
16c bottom surface
17 Lower contact member
17a Lower contact part
17b Stepped part (locking part)
17c Shaft
17d Large diameter part
17e Small diameter part
18 Spring (biasing means)
19 Upper plate
20 Lower plate
21 First upper insert
22 Second upper insert
23 First lower insert
24 Second lower insert

Claims (3)

A socket body that is disposed on the wiring board and in which an electrical component on which a terminal is formed is accommodated on the upper surface side;
A contact pin disposed in the socket body, in contact with the terminal of the electrical component and the electrode of the wiring board, and electrically connecting the terminal of the electrical component and the electrode of the wiring board;
The contact pin is
An upper contact member that is formed on the upper part and that contacts the terminal of the electrical component; and an upper contact member that has a cylindrical part formed on the lower side of the upper contact part;
A lower contact member, which is disposed on the lower side of the cylindrical portion of the upper contact member so as to be movable up and down, and has a lower contact portion in contact with an electrode of the wiring board at a lower end portion;
A biasing means disposed in the cylindrical portion of the upper contact member and biasing the upper contact member and the lower contact member away from each other;
The socket body is
An upper plate provided with an upper insertion hole through which the upper contact portion of the upper contact member is inserted so as to be movable up and down from below;
A lower plate having a lower insertion hole through which the lower contact member is inserted so as to be movable up and down from the upper side;
The upper insertion hole is formed with a rotation blocking portion for blocking rotation of the contact pin in a state where the upper contact portion is inserted, and
The lower contact member is inserted into the lower contact member so as to prevent the upper contact member from coming out downward from the rotation preventing portion before the socket body is disposed on the wiring board. A socket for an electrical component, characterized in that a locking portion for locking to the peripheral edge of the hole is formed.   The lower contact member has a cylindrical shaft portion, and the shaft portion has a large diameter portion formed in an upper portion and a small diameter portion formed in a lower portion, and the large diameter portion and the small diameter portion The socket for an electrical component according to claim 1, wherein the locking portion is configured by a step portion therebetween.   The urging means is a coil spring provided in a cylinder portion of the upper contact member so as to be extendable and contracted. One end of the coil spring contacts the upper contact portion, and the other end contacts the lower contact member. The socket for electrical parts according to claim 1 or 2, wherein the socket is for electrical parts.

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