JP2018200821A - Electric contactor and socket for electrical component - Google Patents

Abstract

To provide an electric contactor and a socket for electrical components capable of preventing a coil spring from bending and electrically connecting the electric components in a normal state.SOLUTION: An electric contactor 20 which is disposed between electric components and electrically connects the electric components has: a first contact part 30 in contact with one of the electric components; a second contact part 40 in contact with the other electric component; and a coil spring 50 energizing the first contact part 30 and the second contact part 40 in a direction in which they are separated from each other. The coil spring 50 is composed of an effective winding part 54 which has energizing force energizing the first contact part 30 and the second contact part 40 in the direction in which they are separated from each other and a tightly wound part 53 which has no energizing force. Between a part with which the coil spring 50 of the first contact part 30 is in contact and a part with which the coil spring 50 of the second contact part 40 is in contact, the electric contactor 20 has a tightly wound part 53 which has a large space part 43 of a larger diameter than a diameter of the coil spring 50 at a part where the large space part 43 of the coil spring 50 exists.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electrical contact that is electrically connected to an electrical component such as a semiconductor device (hereinafter referred to as an “IC package”), and an electrical component socket in which the electrical contact is disposed.

  Conventionally, as this type of electrical contact, a contact pin provided in an IC socket as an electrical component socket is known. The IC socket is arranged on the wiring board and accommodates the IC package to be inspected. The terminals of the IC package and the electrodes of the wiring board are connected via the contact pins. It is electrically connected to perform tests such as a continuity test.

  Among such contact pins, there is one in which a coil spring is disposed between contact portions that are in contact with the wiring board and the IC package so as to bias the contact portions in a direction in which the contact portions are separated from each other (for example, patents). Reference 1).

JP 2005-172581 A

  Here, in the IC socket having the contact pin provided with the coil spring as described in Patent Document 1, the contact pin is pressed in the direction in which both the wiring board and the IC package approach against the biasing force of the coil spring. The wiring board and the IC package are electrically connected in a state where a predetermined contact pressure is secured via the contact pins.

  However, in such a contact pin, the coil spring is bent by the pressing force of the wiring board and the IC package, which may cause a problem that a normal connection cannot be made.

  Therefore, the present invention prevents the bending of the coil spring and can electrically connect the electrical components (wiring board and IC package) in a normal state and the electrical component socket ( It is an object to provide an IC socket.

  In order to achieve such a subject, the invention according to claim 1 is an electrical contact that is disposed between two electrical components and electrically connects the two electrical components to each other. A first contact portion that contacts, a second contact portion that contacts the other electrical component, and a coil spring that biases the first contact portion and the second contact portion in a direction away from each other. An effective winding portion having an urging force for urging the first contact portion and the second contact portion in a direction away from each other, and a tightly wound portion not having the urging force, Between the location where the coil spring contacts and the location where the coil spring of the second contact portion contacts, there is a large space portion having a diameter larger than the diameter of the coil spring, and exists in the large space portion of the coil spring. Electrical contact with the tightly wound portion It is characterized in that as a child.

  According to a second aspect of the present invention, in addition to the configuration according to the first aspect, the first contact portion and the second contact portion are formed when the tightly wound portion does not have the tightly wound portion in the coil spring. When the coil spring is pressed in a direction approaching against the urging force of the coil spring, the electrical contact is provided in a location where the coil spring starts to bend in the large space.

  According to a third aspect of the present invention, in addition to the configuration according to the first or second aspect, the first contact portion has an insertion portion having substantially the same diameter as the coil spring and into which the coil spring is inserted. The second contact portion has a cylindrical portion into which the insertion portion and the coil spring inserted into the insertion portion are inserted, and the coil spring extends from the insertion portion in the cylindrical portion. Between the protruding part and the part where the coil spring of the second contact part contacts, there is a large space part having a diameter larger than the diameter of the coil spring, and the first contact part and the second contact part The electric contactor is configured to be expanded and contracted.

  According to a fourth aspect of the present invention, in addition to the configuration according to the first or second aspect, the first contact portion has a first insertion portion having substantially the same diameter as the coil spring and into which the coil spring is inserted. The second contact portion has a second insertion portion that is substantially the same diameter as the coil spring and into which the coil spring is inserted. The second contact portion has a cylindrical shape, and the first insertion portion starts from one end. Is inserted inside, and the second insertion portion is inserted into the inside from the other end, and the coil spring is inserted into the first insertion portion at one end in the cylindrical portion. And the other end portion is inserted into the second insertion portion, and the coil spring protrudes from both the first insertion portion and the second insertion portion in the cylindrical portion. A large space portion having a diameter larger than the diameter, and the first contact portion and the second contact portion, It has an electrical contact that is configured to be stretchable and said.

  According to a fifth aspect of the present invention, there is provided a socket main body disposed on one electrical component and having a receiving portion for accommodating another electrical component, and the one electrical component and the other disposed on the socket main body. It is set as the socket for electrical components which has the electrical contactor as described in any one of Claim 1 thru | or 4 which contacts the terminals provided in this electrical component.

  According to invention of Claim 1, it has a large space part with a larger diameter than the diameter of a coil spring between the location where the coil spring of a 1st contact part contacts, and the location where the coil spring of a 2nd contact part contacts. The tightly wound portion is formed at the location of the coil spring so that the tightly wound portion is provided at an appropriate position to prevent the coil spring from being bent and the electrical components are electrically connected in a normal state. can do.

  According to the second aspect of the present invention, since the tightly wound portion is provided at a position where the coil spring in the large space portion starts to bend, the tightly wound portion is provided at a more appropriate position so that the coil spring can be bent. It can prevent reliably and can electrically connect electrical components in a more normal state. In addition, if the tightly wound part is provided at the location where the coil spring begins to bend, it is possible to prevent the coil spring from being bent, so there is no need to provide an extra tightly wound part at other locations, which is effective for the length of the coil spring. The ratio of the winding portion can be increased, and the coil spring can be efficiently expanded and contracted.

  According to invention of Claim 3, it is comprised with the 1st contact part which has an insertion part, the 2nd contact part which has a cylindrical part in which an insertion part is inserted, and a coil spring inserted in these. In the electrical contact, the tightly wound portion is provided at an appropriate position to prevent the coil spring from being bent, and the electrical components can be electrically connected in a normal state.

  According to invention of Claim 4, the cylinder into which the 1st contact part which has a 1st insertion part, the 2nd contact part which has a 2nd insertion part, and a 1st insertion part and a 2nd insertion part are inserted. In an electrical contact composed of a coil-shaped part and a coil spring inserted into these, a tightly wound part is provided at an appropriate position to prevent the coil spring from being bent and to electrically connect electrical components in a normal state. can do.

  According to the fifth aspect of the present invention, since the electric contactor according to any one of the first to fourth aspects is provided, the tightly wound portion is provided at an appropriate position to prevent the coil spring from being bent. And it can be set as the socket for electrical components which can electrically connect electrical components in a normal state.

It is a top view of the IC socket which concerns on Embodiment 1 of this invention. It is AA sectional drawing of FIG. 1 in the IC socket which concerns on the same Embodiment 1. FIG. It is a figure which shows the state of the contact pin arrange | positioned at the IC socket which concerns on the same Embodiment 1, Comprising: (a) The state before arrangement | positioning of an IC socket, (b) An IC socket is a wiring board from the state of (a) It is a figure which shows the state which accommodated the IC package in the state arrange | positioned in (c) and the state of (b). It is an expanded sectional view which shows the state before the press of the contact pin which concerns on the same Embodiment 1. FIG. It is an expanded sectional view which shows the state after the press of the contact pin which concerns on the same Embodiment 1. FIG. It is a transmission photograph which shows the state before the press of the contact pin which concerns on the same Embodiment 1. FIG. It is a transmission photograph which shows the state after the press of the contact pin which concerns on the same Embodiment 1. FIG. It is a permeation | transmission photograph of the comparative example which shows the state before the press of the contact pin which does not have a contact | adherence winding part in a large space part. It is a permeation | transmission photograph of the comparative example which shows the state after the press of the contact pin which does not have a contact | adherence winding part in a large space part. It is the (a) front view and the (b) back view which show the IC package used in the first embodiment. It is an expanded sectional view which shows the state before the press of the contact pin which concerns on Embodiment 2 of this invention. It is an expanded sectional view which shows the state after the contact pin which concerns on the same Embodiment 2 is pressed.

Embodiments of the present invention will be described below.
Embodiment 1 of the Invention
1 to 10 show a first embodiment of the present invention.

  As shown in FIG. 2, an IC socket 10 as an “electrical component socket” of this embodiment is fixed on a wiring board 1 as an “electrical component”, and an IC package 2 as an “electrical component” at the top. Is configured to electrically connect electrodes (not shown) as “terminals” of the wiring substrate 1 and solder balls 4 as “terminals” of the IC package 2, for example, the IC package 2. It is used in a test apparatus for continuity tests such as burn-in test and reliability test for the above.

  First, the IC package 2 of this embodiment will be described with reference to FIG. As shown in FIG. 10, the IC package 2 of this embodiment has a package body 3 having a substantially square shape in plan view. A plurality of spherical solder balls 4 are arranged in a matrix on the lower surface 5 of the package body 3. Is provided.

  Next, the IC socket 10 of this embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the IC socket 10 of this embodiment has a plate-shaped socket body 11, and the IC package 2 is accommodated in a substantially central portion of the upper surface of the socket body 11. The container 12 has a substantially rectangular shape.

  Further, as shown in FIGS. 1 and 2, the socket body 11 is provided with a plurality of contact pins 20 as “electrical contacts” arranged penetrating in the vertical direction. The pins 20 are arranged in a matrix in the accommodating portion 12 of the socket body 11. In addition, a guide portion 13 formed in a protruding shape is provided at a corner portion around the housing portion 12 in order to guide the IC package 2 to the housing portion 12.

  In this embodiment, the arrangement pitch of the solder balls 4 of the IC package 2 and the arrangement pitch of the electrodes of the wiring board 1 electrically connected to the solder balls 4 are the same, and the arrangement pitch of the contact pins 20. Are the same as these arrangement pitches.

  As shown in FIGS. 3 to 5, each contact pin 20 has a substantially crown-shaped first upper end portion 31 in electrical contact with the solder ball 4 of the IC package 2 at the upper end along the longitudinal axis L. A first plunger 30 as a “first contact portion” and a second plunger 40 as a “second contact portion” having a projecting-shaped second lower end portion 41 in electrical contact with the electrode of the wiring board 1 at the lower end. And a coil spring 50 which is continuous between the first plunger 30 and the second plunger 40 and biases the first plunger 30 and the second plunger 40 along the axis L in a direction away from each other. Yes.

  Further, as shown in FIGS. 4 and 5, the first plunger 30 is formed with a hollow insertion portion 33 into which the one end 51 side of the coil spring 50 is inserted. The insertion portion 33 has an insertion port 33 a in the first lower end portion 32 opposite to the first upper end portion 31, and the one end portion 51 side of the coil spring 50 is inserted into the first plunger 30 from the insertion port 33 a. It is configured to be inserted and held. The inner diameter of the insertion portion 33 is substantially the same as the diameter of the coil spring 50, and the coil spring 50 is slid and inserted.

  As shown in FIGS. 4 and 5, the first lower end portion 32 is formed larger than the outer diameter of the other portion of the insertion portion 33. Further, the innermost portion of the insertion portion 33 on the first upper end portion 31 side has a coil spring locking portion 34 having a substantially conical shape, and the coil spring 50 is easily locked by this shape.

  As shown in FIGS. 4 and 5, the second plunger 40 has two large hollow portions 43, which are a large-diameter large-diameter cylindrical portion 43 and a small-diameter small-diameter portion 44 as “cylindrical portions”. 44 is provided to be continuous along the axis L. Among these, the large-diameter cylindrical portion 43 has an insertion port 43 a in the second upper end portion 42 opposite to the second lower end portion 41, and the coil spring 50 and the insertion portion 33 of the first plunger 30 are connected from the insertion port 43 a. The second plunger 40 is configured to be inserted and held.

  The large-diameter cylindrical portion 43 is formed in a size and shape that allows the insertion portion 33 to slide and be inserted. Therefore, the outer diameter S of the coil spring 50 is smaller than the inner diameter T of the large diameter cylindrical portion 43 by a predetermined amount with the coil spring 50 inserted.

  As shown in FIGS. 4 and 5, the second upper end portion 42 is processed to have a smaller diameter than the other large-diameter cylindrical portion 43, and the first diameter that is the larger diameter of the first plunger 30. The lower end portion 32 is locked at this position so that the first plunger 30 does not come off the second plunger 40.

  Further, a small diameter portion 44 is formed on the second lower end portion 41 side of the large diameter cylindrical portion 43. The small-diameter portion 44 is formed to have the same diameter as that of a coil spring 50 described later, and is configured to insert the other end portion 52 side of a predetermined amount of the coil spring 50. Further, the innermost part of the small diameter portion 44 on the second lower end portion 41 side has a substantially conical coil spring locking portion 45, which is configured so that the coil spring 50 can be easily locked.

  As shown in FIGS. 4 and 5, the coil spring 50 includes an effective winding portion 54 having a biasing force that biases the first plunger 30 and the second plunger 40 away from each other, and 2 that does not have the biasing force. It is composed of two tightly wound portions 53.

  Further, as shown in FIG. 4, the coil spring 50 has one end on the insertion portion 33 of the first plunger 30 so as to bias the first plunger 30 and the second plunger 40 along the axis L in a direction away from each other. The portion 51 side is inserted, and the other end 52 side is inserted and held in the small diameter portion 44 through the large diameter cylindrical portion 43 of the second plunger 40.

  In addition, as shown in FIG. 3A, in a state where no pressing force is applied to the contact pin 20 from the wiring board 1 or the IC package 2, the location where the coil spring 50 of the first plunger 30 contacts and 2 between the portion of the plunger 40 where the coil spring 50 contacts, that is, between the insertion port 33a of the insertion portion 33 of the first plunger 30 and the entrance of the small diameter portion 44 of the second plunger 40. A large space portion 49 having a predetermined space is formed between the inner wall portion 43 b of the large-diameter cylindrical portion 43 and the coil spring 50 in the enclosed space. And it forms so that one of the close_contact | adherence winding parts 53 may be located in this large space part 49. FIG.

  In particular, in this embodiment, when it is assumed that the tightly wound portion 53 does not have the tightly wound portion 53 in the coil spring 50 in addition to the inside of the insertion portion 33, the first plunger 30 and the second plunger 40 are When the coil spring 50 is pressed in a direction approaching against the urging force of the coil spring 50, the coil spring 50 is provided at a position P where the coil spring 50 starts to bend in the large space portion 43. Specifically, the two tightly wound portions 53 are formed at a position P where the coil spring 50 that is not biased is spaced a predetermined amount from the position where the coil spring 50 protrudes from the insertion port 33 a of the insertion portion 33.

  Note that two tightly wound portions 53 may be provided as shown in FIG. 4, or one or three or more may be provided to the extent that the urging force can be maintained. Further, the number of tightly wound portions 53 located in the large space 49 is not limited to one as shown in FIG. 4, and a plurality of closely wound portions 53 may be provided.

  Next, the operation of the IC socket 10 including the contact pin 20 provided with such a coil spring 50 will be described.

  When the IC socket 10 is used, as shown in FIGS. 1 and 2, a plurality of contact pins 20 are respectively attached to the socket body 11, and the first socket as shown in FIGS. The first upper end portion 31 of the plunger 30 is protruded upward, and the second lower end portion 41 of the second plunger 40 is protruded downward. Then, the IC socket 10 is positioned and fixed to the wiring board 1, and the second lower end portion 41 of the second plunger 20 is brought into contact with the electrode of the wiring board 1 as shown in FIG. At this time, the entire contact pin 20 slides upward.

  Thereafter, as shown in FIG. 3C, the IC package 2 is accommodated in the accommodating portion 12, and the solder ball 4 is brought into contact with the first upper end portion 31. In this state, when a pressing jig (not shown) or the like is lowered to press the IC package 2 downward, the first upper end portion 31 of the first plunger 30 is pressed by the solder ball 4, and FIGS. As shown, the first plunger 30 is pushed downward.

  Then, by compressing the coil spring 50 by the first plunger 30 and the second plunger 40 in this way, the effective winding portion 54 of the coil spring 50 contracts, and the first plunger 30 is urged by the urging force of the effective winding portion 54 of the coil spring 50. The first upper end portion 31 and the second lower end portion 41 of the second plunger 40 are urged away from each other. As a result, the contact pins 20 are brought into contact with the electrodes of the wiring board 1 and the solder balls 4 of the IC package 2 with an appropriate contact pressure so that both are electrically connected. Conduct a continuity test.

  At this time, when it is assumed that the tightly wound portion 53 of the coil spring 50 does not have the tightly wound portion 53 on the coil spring 50, the first plunger 30 and the second plunger 40 approach against the biasing force of the coil spring 50. The coil spring 50 is provided at a location P where the coil spring 50 starts to bend in the large space 49 when pressed in the direction (specifically, the coil spring 50 that is not biased is inserted through the insertion port 33a of the insertion portion 33). (Two close winding portions 53 are provided at a position P spaced apart from the protruding portion by a predetermined amount).

  As a result, the movement of the coil spring 50 can be reduced by the tightly wound portion 53 at the place where the coil spring 50 compresses and acts to be bent. As a result, the coil spring 50 is prevented from being bent, and the wiring board 1 can be prevented from bending. And the IC package 2 can be electrically connected in a normal state.

  For example, as shown in FIGS. 8 and 9, the conventional contact pin 220 without the tightly wound portion 53 is pressed from both above and below with respect to the state where the pressing force shown in FIG. 8 is not applied. When the coil spring 250 is compressed, as shown in FIG. 9, the coil spring 250 is bent starting from a specific position P (a position where the coil spring 250 starts to bend) P of the large space portion 49, and the inner wall portion 43 b of the large space portion 49 is bent. It will bend until it touches.

  On the other hand, in the contact pin 20 of this embodiment shown in FIGS. 6 and 7, the coil spring 50 is compressed by pressing similarly from both above and below against the state where the pressure shown in FIG. 6 is not applied. Then, as shown in FIG. 7, since the tightly wound portion 53 is provided at a specific position P of the large space portion 49, the bending is reduced until the bending is reduced and the inner wall portion 43 b of the large space portion 49 is contacted. There is no such thing.

  Thus, according to the contact pin 20 of this embodiment, the diameter is larger than the diameter S of the coil spring 50 between the portion where the coil spring 50 of the first plunger 30 contacts and the portion where the coil spring 50 of the second plunger 40 contacts. It has a large space portion 49 of T, and the tightly wound portion 53 is formed at a location where the coil spring 50 exists, so that the tightly wound portion 53 is provided at an appropriate position to prevent the coil spring from being bent. In addition, the wiring board 1 and the IC package 2 can be electrically connected in a normal state.

  Further, according to the contact pin 20 of this embodiment, the tightly wound portion 53 is provided at a more appropriate position by providing the tightly wound portion 53 at the position P where the coil spring 50 in the large space 49 starts to bend. Is provided to reliably prevent the coil spring 50 from being bent, and the wiring board 1 and the IC package 2 can be electrically connected in a more normal state. In addition, if the tightly wound portion 53 is provided at the location P where the coil spring 50 starts to bend, the coil spring 50 can be prevented from being bent, so that it is not necessary to provide the tightly wound portion 53 at other locations. The ratio of the effective winding portion 54 to the length can be increased, and the coil spring 50 can be efficiently expanded and contracted.

  Further, according to the contact pin 20 of this embodiment, the first plunger 30 having the insertion portion 33, the second plunger 40 having the large-diameter cylindrical portion 43 into which the insertion portion 33 is inserted, and the insertion into these. In the contact pin 20 composed of the coil spring 50 that is formed, the tightly wound portion 53 is provided at an appropriate position P to prevent the coil spring 50 from being bent, and the wiring board 1 and the IC package 2 are electrically connected in a normal state. Can be connected.

In addition, according to the IC socket 10 of this embodiment, since the contact pin 20 as described above is provided, the tightly wound portion 53 is provided at an appropriate position P to prevent the coil spring 50 from being bent and wiring. The IC socket 10 can be electrically connected to the substrate 1 and the IC package 2 in a normal state.
[Embodiment 2 of the Invention]
11 and 12 show a second embodiment of the present invention. The embodiment of the present invention is the same as that of the above-described first embodiment except for the matters described below. Therefore, the same reference numerals are given to the matters other than the matters different from the above-described first embodiment, and the description is omitted. To do.

  In this embodiment, the contact pin 20 in the first embodiment described above is changed to a contact pin 120 having a different configuration as shown in FIGS. Hereinafter, the contact pin 120 in this embodiment will be described.

  As shown in FIGS. 11 and 12, the contact pin 120 of this embodiment has a substantially crown-shaped first contact that is in electrical contact with the solder ball 4 of the IC package 2 at the upper end along the axis L in the longitudinal direction. As a “second contact portion” having a first plunger 130 as a “first contact portion” having an upper end portion 131 and a projecting second lower end portion 141 in electrical contact with the electrode of the wiring board 1 at the lower end. The second plunger 140, the cylindrical member 160 for inserting the first plunger 130 from one direction (upward) and the second plunger 140 from the opposite direction (downward), the first plunger 130 and the second plunger 140 and a coil spring 150 that urges the first plunger 130 and the second plunger 140 along the axis L in a direction away from each other.

  The first plunger 130 of this embodiment is composed of two members, a first upper end portion 131 and a first insertion portion 133. Among these, the first upper end portion 131 includes a substantially crown-shaped contact portion 131 a that contacts the solder ball 4 of the IC package 2, a bowl-shaped enlarged diameter portion 131 b, and an insertion portion 131 c that is inserted into the first insertion portion 133. have. The insertion portion 131c has a recess 131d having a small diameter at a part thereof.

  The first insertion portion 133 is a cylindrical member, and is formed so that the one end 151 side of the coil spring 150 is inserted and the first upper end 131 is inserted. The first insertion portion 133 has a first insertion port 133a at the first lower end 132 and a second insertion port 133b at the first upper end 131 on the opposite side.

  Then, the insertion portion 131c of the first upper end portion 131 is inserted into the second insertion port 133b, and the expanded diameter portion 131b is in contact with the edge portion 133d of the second insertion port 133b of the first insertion portion 133. The first upper end 131 is fixed to the first insertion portion 133 by caulking the first insertion portion 133 at the position of the recess 131d to form the recess 133c.

  Further, one end 151 side of the coil spring 150 from the first insertion port 133 a is inserted into the hollow portion 133 e of the first insertion portion 133 and held. The hollow portion 133e has an inner diameter that is substantially the same as the diameter of the coil spring 150, and the coil spring 150 is slid and inserted.

  Further, the first lower end 132 side is formed larger than the outer diameter of the other part of the first insertion part 133. Further, the innermost part of the first insertion part 133 on the first upper end part 131 side (the lower end part of the insertion part 131c of the first upper end part 131) has a substantially conical coil spring locking part 134. The coil spring 150 is configured to be easily locked depending on the shape.

  The second plunger 140 has a hollow second insertion portion 143 into which the other end 152 side of the coil spring 150 is inserted. The second insertion portion 143 has an insertion port 143a in the second upper end portion 142 opposite to the second lower end portion 141, and the other end 152 side of the coil spring 150 is connected to the second plunger from the insertion port 143a. It is configured to be inserted and held inside 140. The second insertion portion 143 has an inner diameter substantially the same as the diameter of the coil spring 150, and the coil spring 150 is slid and inserted.

  Further, the second upper end portion 142 side is formed larger than the outer diameter of the other portion of the second insertion portion 143. In addition, the innermost portion of the second insertion portion 143 on the second lower end portion 141 side has a substantially conical coil spring locking portion 145, and this shape is configured so that the coil spring 150 can be easily locked. Yes.

  The cylindrical member 160 is provided with a large-diameter cylindrical portion 163 as a large-diameter “cylindrical portion” that penetrates the upper-end-side insertion port 163a and the lower-end-side insertion port 163b. The coil spring 150 and the first insertion portion 133 of the first plunger 130 are inserted into the large diameter cylindrical portion 163 from the upper end side insertion port 163a, and the second insertion portion 143 of the second plunger 140 is inserted into the large diameter cylinder from the lower end side insertion port 163b. When the coil spring 150 is inserted into the portion 163 and is engaged with the coil spring engagement portion 134 of the first insertion portion 133 and the coil spring engagement portion 145 of the second insertion portion 143, these members are held. It is comprised so that.

  Moreover, the upper end side insertion port 163a and the lower end side insertion port 163b are processed so as to have a smaller diameter than the other cylindrical members 160, and the first lower end portion 132 having a larger diameter of the first plunger 130 is the upper end. The second upper end portion 142 that is locked by the side insertion port 163a and has a large diameter of the second plunger 140 is locked by the lower end side insertion port 163b, and the first plunger 30 and the second plunger 40 are tubular members. It is configured not to deviate from 160.

  The large-diameter cylindrical portion 163 is formed in a size and shape that allows the first insertion portion 133 and the second insertion portion 143 to slide and be inserted. Therefore, with the coil spring 150 inserted, the outer diameter V of the coil spring 50 is smaller than the inner diameter W of the large diameter cylindrical portion 163 by a predetermined amount.

  Further, as shown in FIG. 11, the coil spring 150 includes an effective winding portion 154 having a biasing force that biases the first plunger 130 and the second plunger 140 in a direction away from each other along the axis L, and the biasing force. It is comprised with the two close_contact | adherence winding parts 153 which do not have.

  Further, as shown in FIG. 11, the coil spring 150 urges the first plunger 130 and the second plunger 140 along the axis L in a direction away from each other, so that the first insertion portion 133 of the first plunger 130 is urged. The one end 151 side is inserted into the second plunger 140 and the other end 152 side is inserted and held in the second insertion portion 143 of the second plunger 140.

  In addition, as shown in FIG. 11, the position where the coil spring 150 of the first plunger 130 contacts with the second plunger 140 in a state where neither the wiring board 1 nor the IC package 2 is pressed against the contact pin 120. Of the large-diameter cylindrical portion 163 between the portions where the coil spring 150 contacts, that is, between the insertion port 133a of the first insertion portion 133 of the first plunger 130 and the insertion port 143a of the second insertion portion 143 of the second plunger 140. A large space portion 169 having a predetermined space is formed between the inner wall portion 164 of the large diameter cylindrical portion 163 and the coil spring 150 in the space surrounded by the inner wall portion 164. And it forms so that both the close_contact | adherence winding parts 153 may be located in this large space part 169. FIG.

  In particular, in this embodiment, when it is assumed that the tightly wound portion 153 does not have the tightly wound portion 153 in the coil spring 150, the first plunger 130 and the second plunger 140 resist the biasing force of the coil spring 150. The coil spring 150 is provided at the locations Q and R where the coil spring 150 starts to bend in the large space 169 when pressed in the direction approaching. Specifically, the positions Q and R where the coil springs 150 that are not urged are spaced apart from the first protrusions 133 a of the first insertion part 133 and the second insertion openings 143 a of the second insertion part 143 by a predetermined amount. Have two tightly wound portions 153.

  Note that two close winding portions 153 may be provided as shown in FIG. 11, or one or three or more may be provided to the extent that the urging force can be maintained. Further, the number of tightly wound portions 153 located in the large space portion 169 is not limited to two as shown in FIG. 11, and one or three or more may be provided.

  Next, an operation of the IC socket 10 including the contact pin 120 provided with such a coil spring 150 will be described. Note that description of the same description as in the first embodiment is omitted.

  When the IC socket 10 is used, a plurality of contact pins 120 are respectively attached to the socket body 11 as shown in FIGS. 1 and 2 in the first embodiment, and as shown in FIG. The first upper end portion 131 of the first plunger 130 protrudes upward from the upper end side insertion port 163a of the cylindrical member 160, and the second lower end portion 141 of the second plunger 140 extends from the lower end side insertion port 163b of the cylindrical member 160. Is arranged in a state of protruding downward.

  Then, the IC socket 10 provided with such contact pins 120 is positioned and fixed to the wiring board 1, the second lower end portion 141 of the second plunger 140 is brought into contact with the electrode of the wiring board 1, and the IC package 2 is accommodated in the housing portion. 12, the solder ball 4 is brought into contact with the first upper end 131. In this state, a pressing jig (not shown) is lowered to press the IC package 2 downward.

  Then, the first upper end portion 131 of the first plunger 130 is pressed by the solder ball 4, and the second lower end portion 141 of the second plunger 140 is pressed by the terminal of the wiring board 1, and as shown in FIG. 130 is pushed downward and the second plunger 140 is pushed upward.

  Then, by compressing the coil spring 150 by the first plunger 130 and the second plunger 140 in this way, the effective winding portion 154 of the coil spring 150 contracts, and the first plunger 130 is urged by the urging force of the effective winding portion 154 of the coil spring 150. The first upper end portion 131 and the second lower end portion 141 of the second plunger 140 are urged away from each other. As a result, the contact pins 120 are brought into contact with the electrodes of the wiring board 1 and the solder balls 4 of the IC package 2 with appropriate contact pressure, and both are electrically connected. Conduct a continuity test.

  At this time, when it is assumed that the tightly wound portion 153 of the coil spring 150 does not have the tightly wound portion 153 in the coil spring 150, the first plunger 130 and the second plunger 140 approach against the biasing force of the coil spring 150. When the coil spring 150 is pressed in the direction, it is provided at locations Q and R where the coil spring 150 starts to bend in the large space portion 169 (specifically, the coil spring 150 which is not biased is provided in the first insertion portion 133). The coil spring 150 that has two tightly wound winding portions 153 at a position Q spaced apart from a portion protruding from the first insertion port 133a by a predetermined amount and that is not biased protrudes from the second insertion port 143a of the second insertion portion 143. The position R separated by a predetermined amount from the location also has two tightly wound portions 153).

  As a result, the movement of the coil spring 150 can be reduced by the tightly wound portion 153 where the coil spring 150 compresses and acts to be bent. As a result, the coil spring 150 is prevented from bending and the wiring board 1 And the IC package 2 can be electrically connected in a normal state.

  Thus, according to the contact pin 120 of this embodiment, the diameter is larger than the diameter V of the coil spring 150 between the location where the coil spring 150 of the first plunger 130 contacts and the location where the coil spring 150 of the second plunger 140 contacts. By having the large space portion 169 of W and the tightly wound portion 153 formed at the location where the coil spring 150 is present, the tightly wound portion 153 is provided at appropriate positions Q and R, and the coil spring 150. Therefore, the wiring board 1 and the IC package 2 can be electrically connected in a normal state.

  Further, according to the contact pin 120 of this embodiment, the tightly wound portions 153 are provided at the locations Q and R where the coil spring 150 in the large space portion 163 starts to bend, so that the tightly wound portions are more appropriately positioned. The portion 153 is provided to reliably prevent the coil spring 150 from being bent, and the wiring board 1 and the IC package 2 can be electrically connected in a more normal state. Further, if the tightly wound portion 153 is provided at the locations Q and R where the coil spring 150 starts to bend, the coil spring 150 can be prevented from being bent, so that it is not necessary to additionally provide the tightly wound portion 153 at other locations. The ratio of the effective winding portion 154 to the length of 150 can be increased, and the coil spring 150 can be efficiently expanded and contracted.

  Further, according to the contact pin 120 of this embodiment, the first plunger 130 having the first insertion portion 133, the second plunger 140 having the second insertion portion 143, the first insertion portion 133, and the second insertion portion. In the contact pin 120 composed of the large-diameter cylindrical portion 163 into which the coil spring 143 is inserted and the coil spring 150 inserted into these, the tightly wound portions 153 are provided at appropriate positions Q and R so that the coil spring 150 is bent. Therefore, the wiring board 1 and the IC package 2 can be electrically connected in a normal state.

  Further, according to the IC socket 10 of this embodiment, since the contact pin 120 as described above is provided, the tightly wound portions 153 are provided at appropriate positions Q and R to prevent the coil spring 150 from being bent. The IC socket 10 can be electrically connected to the wiring board 1 and the IC package 2 in a normal state.

  The “electric contactor” of the present invention is not limited to the contact pin having the structure as in the first and second embodiments, but can be applied to other structures. In the first and second embodiments described above, the “electrical component socket” of the present invention is applied to an IC socket having no cover or the like and having an open upper surface. However, the present invention is not limited to this. The present invention can also be applied to IC sockets having other devices than the IC socket.

1 Wiring board (electric parts)
2 IC package (electrical parts)
4 Solder balls (terminals)
10 IC socket (socket for electrical parts)
11 Socket body
20,120 Contact pin (Electric contact)
30,130 1st plunger (1st contact part)
33 Insertion section
40,140 2nd plunger (2nd contact part)
43,163 Large diameter cylindrical part (cylindrical part)
49,169 Large space
50,150 coil spring
51,151 One end
52,152 other end
53,153 Tightly wound part
54,154 Effective winding part
133 First insert
143 Second insert
P, Q, R where to start bending

Claims (5)

In an electrical contact disposed between two electrical components and electrically connecting the two electrical components,
A first contact portion that contacts one of the electrical components; a second contact portion that contacts the other electrical component; and a coil spring that biases the first contact portion and the second contact portion in a direction away from each other. ,
The coil spring is composed of an effective winding portion having a biasing force that biases the first contact portion and the second contact portion in a direction away from each other, and a tightly wound portion that does not have the biasing force.
Between the location where the coil spring of the first contact portion contacts and the location where the coil spring of the second contact portion contacts, there is a large space portion having a diameter larger than the diameter of the coil spring,
An electrical contact having the tightly wound portion at a location in the large space of the coil spring.   When the close contact winding portion is pressed in a direction in which the first contact portion and the second contact portion approach against the biasing force of the coil spring when the coil spring does not have the close contact winding portion, The electrical contact according to claim 1, wherein the coil spring is provided at a position where the coil spring starts to be bent in the large space. The first contact portion has an insertion portion that is substantially the same diameter as the coil spring and into which the coil spring is inserted.
The second contact portion has a cylindrical portion into which the insertion portion and the coil spring inserted into the insertion portion are inserted,
Between the portion where the coil spring protrudes from the insertion portion in the tubular portion and the portion where the coil spring contacts the second contact portion, a large space portion having a diameter larger than the diameter of the coil spring is provided.
The electric contact according to claim 1, wherein the first contact portion and the second contact portion are configured to be expanded and contracted. The first contact portion has a first insertion portion having substantially the same diameter as the coil spring and into which the coil spring is inserted.
The second contact portion has a second insertion portion that is substantially the same diameter as the coil spring and into which the coil spring is inserted.
Presenting a cylindrical shape, the first insertion portion is inserted into the inside from one end, and the second insertion portion is inserted into the inside from the other end,
The coil spring has one end inserted into the first insertion portion and the other end inserted into the second insertion portion within the cylindrical portion,
The cylindrical portion has a large space portion having a diameter larger than the diameter of the coil spring at a location where the coil spring protrudes from both the first insertion portion and the second insertion portion.
The electric contact according to claim 1, wherein the first contact portion and the second contact portion are configured to be expanded and contracted. A socket body that is disposed on one electrical component and has a housing portion that houses another electrical component;
The electrical contact according to any one of claims 1 to 4, wherein the electrical contact is disposed on the socket body and contacts terminals provided on the one electrical component and the other electrical component. A socket for electrical components.