JP6042201B2 - Socket for electrical parts - Google Patents

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. In the IC socket, a plurality of contact pins are arranged at a predetermined pitch in order to contact the terminals of the IC package and the electrodes of the wiring board to electrically connect them.

  The contact pin is a so-called one-end sliding contact pin (that is, an upper contact member such as a barrel that contacts the terminal of the IC package, and the upper contact for reasons such as stabilization of contact resistance during conduction. A contact pin having a lower contact member such as a plunger that is inserted into the cylindrical portion of the member so that the upper side is movable up and down and contacts an electrode of the wiring board is widely used (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2005-9927

  However, in such a conventional device, the lower contact member is inevitably compared to a so-called both-end sliding contact pin in order to ensure contact pressure with respect to the terminal of the IC package and the electrode of the wiring board. The amount of protrusion downward from the socket body increases. Therefore, when the IC socket is attached to the wiring board, the lower contact member of the contact pin may hang down from the socket body and tilt, and if the IC socket is disposed on the wiring board in such a state, the lower contact member The leading edge is a cause of being easily detached from the narrow electrode (pad) of the wiring board. Further, if the IC socket is forcibly arranged on the wiring board while the lower contact member is tilted, the lower contact member may be bent. In particular, in the case where a plurality of contact pins are arranged at a narrow pitch, the above-described inconvenience is likely to occur.

  Therefore, according to the present invention, even when a plurality of contact pins are arranged at a narrow pitch, the tip of the lower contact member is detached from the electrode of the wiring board or the lower contact member is bent. It is an object of the present invention to provide an electrical component socket capable of suppressing the above.

In order to achieve such an object, the present invention 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, is disposed on the socket body, A contact pin that contacts a 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 on an upper portion; An upper contact member that contacts the terminal of the electrical component; an upper contact member that has a cylindrical portion formed below the upper contact portion; and a lower side of the cylindrical portion of the upper contact member that is vertically movable. A lower contact member having a lower contact portion in contact with an electrode of the wiring board at a lower end portion, and a cylinder portion of the upper contact member, the upper contact member and the lower contact member being connected to each other Energize away And a energization means, said socket body, said insertion hole lower contact member is inserted is formed on the bottom surface, the lower contact member includes a small-diameter portion formed in a lower portion, said A large-diameter portion formed on the upper portion of the small-diameter portion, and an insertion portion formed on the upper portion of the large-diameter portion so as to be larger than the outer diameter of the large-diameter portion, and inserted into the cylindrical portion of the upper contact member; A step portion formed between the small-diameter portion and the large-diameter portion, and a lower portion of the cylindrical portion of the upper contact member is provided with a caulking portion that engages with the insertion portion inserted. The cylindrical portion of the upper contact member is provided with a stopper that is configured to abut against the socket main body and restrict upward movement of the upper contact member, and the socket main body is connected to the wiring board. In a state before being disposed on the upper surface, the lower surface portion of the cylindrical portion is a predetermined amount above the bottom surface portion. While lifted apart, configured such that the step portion is engaged with the periphery of the insertion hole, the length of the upper contact portion projecting from said upper surface of said socket body, said tubular portion The electrical component socket is configured such that the lower surface portion is shorter than the length away from the bottom surface portion of the socket body .

  Another feature is that the urging means is a coil spring provided in an elastic manner in the cylindrical portion of the upper contact member, and the coil spring has one end contacting the upper contact portion and the other end being the lower contact. It is in contact with the side contact member.

  According to this invention, before the socket body is disposed on the wiring board, the locking portion is the peripheral portion of the insertion hole while the lower surface portion of the cylindrical portion is spaced apart from the bottom surface by a predetermined amount. Therefore, the downward protrusion amount of the lower contact member from the socket body can be reduced. As a result, when the socket body is disposed on the wiring board, even if a plurality of contact pins are disposed at a narrow pitch, the tip of the lower contact member may come off from the electrode of the wiring board, or the lower contact member Can be prevented from being bent.

  According to another feature, since the locking portion contacts and locks the entire circumference of the peripheral portion of the insertion hole, the locking portion can be configured with a simple structure. Therefore, it is possible to manufacture an electrical component socket that exhibits the above-described effects at a low cost.

  According to another feature, since a special structure is not required for the urging member, a coil spring having a simple structure can be used as the urging member. Therefore, it is possible to manufacture an electrical component socket that exhibits the above-described effects at a lower cost.

It is sectional drawing 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 (A) The A arrow directional view of the upper side contact part of the upper side contact member, (d) is the B arrow directional view of the lower side contact part and axial part of the lower side 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.

Embodiments of the present invention will be described below.
Embodiment 1 of the Invention
1 to 3 show a first embodiment of the present invention.

  First, the configuration will be described. Reference numeral 11 in FIG. 1 denotes an IC socket as an “electrical component socket”, and this IC socket 11 is arranged on a wiring board 15 (see FIG. 3B). In order to perform a burn-in test and a test by Kelvin connection (4-terminal connection) such as the IC package 12 (see FIG. 3C) which is an “electric part”, a plurality of terminals of the IC package 12 12b and a plurality of pairs of electrodes 15a of the wiring board 15 are electrically connected. 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. 3C, 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. 3C shows only one terminal 12b among these terminals 12b.

  On the other hand, as shown in FIGS. 1 and 3C, 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. A plurality of pairs arranged 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. Contact pin 14. 1 and 3 show only one pair of contact pins 14 among these contact pins 14.

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

  As shown in FIGS. 1 and 2, each contact pin 14 is formed at the upper portion, and is formed at the 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. A lower contact member 17 having a plunger and the like, and a cylinder portion 16b of the upper contact member 16 are disposed so as to be extendable and urged to urge the upper contact member 16 and the lower contact member 17 in the vertical direction away from each other. And a coil spring 18 as a biasing means.

  Here, as shown in FIG. 1, the upper contact portion 16a is fixed to the cylindrical portion 16b by inserting and caulking the base portion 16e into the cylindrical portion 16b. Further, as shown in FIG. 1, 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.

  As shown in FIGS. 1 and 2, the lower contact member 17 has a cylindrical shaft portion 17c. The shaft portion 17c is formed at the upper portion with a large diameter portion 17d and at the lower portion. The small-diameter portion 17e and the step portion 17b between the large-diameter portion 17d and the small-diameter portion 17e.

  As shown in FIG. 1, the socket body 13 is formed with an insertion hole 13b through which the lower contact member 17 is inserted into the bottom surface portion 13a. On the other hand, the lower contact member 17 of each contact pin 14 has a bottom surface portion 16c of the cylindrical portion 16b and a bottom surface portion 13a of the socket body 13 in a state before the socket body 13 is disposed on the wiring board 15, respectively. The stepped portion 17b is formed as a locking portion that contacts and locks the entire circumference of the peripheral edge portion 13c of the insertion hole 13b while floating upward by a predetermined amount L1 from the side. 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.

  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, each contact pin 14 rises against the urging force of the coil spring 18 such that the lower contact member 17 is pushed up by the wiring board 15. As a result, as shown in FIG. 3B, in each pair of contact pins 14, the lower contact portions 17 a of the two lower contact members 17 and the pair of electrodes 15 a of the wiring board 15 mutually have a predetermined contact pressure. In contact with each other, 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 protrusion L2 (see FIG. 3A) 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.

  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. 3C, in each pair of contact pins 14, the upper contact portions 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 both are electrically connected. Note that all the lower contact members 17 of the contact pins 14 remain in the raised state.

  At this time, the length by which the coil spring 18 contracts as the IC package 12 is accommodated, that is, the urging force of the coil spring 18 at this time is the same as that of the conventional product. 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 13c of the insertion hole 13b. 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 lock the entire periphery of the peripheral edge portion 13c of the insertion hole 13b to lift the cylindrical portion 16b of the upper contact member 16. However, it is also 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 13b, and this portion may be used as a locking portion.

  Moreover, although the said Embodiment 1 demonstrated the socket main body 13 which has the upper side plate 19 and the lower side plate 20, this invention is applicable also to the socket main body 13 of another structure.

  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 surface portion 13b insertion hole 13c peripheral edge portion 13d upper surface portion 14 contact pin 15 wiring board 16 upper contact member 16a upper contact portion 16b cylindrical portion 16c lower surface portion 17 lower contact member 17a lower contact portion 17b stepped portion
17c Shaft portion 17d Large diameter portion 17e Small diameter portion 18 Spring (biasing means)

Claims (2)

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 having an upper contact part formed on the upper part and in contact with a terminal of the electrical component; and 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;
Said socket body, said insertion hole lower contact member is inserted is formed on the bottom surface, the lower contact member includes a small-diameter portion formed in a lower portion, is formed on the upper portion of the small-diameter portion A large-diameter portion, an upper portion of the large-diameter portion, an insertion portion that is formed to be larger than the outer diameter of the large-diameter portion, and is inserted into the cylindrical portion of the upper contact member, and the small-diameter portion and the large-diameter portion A step portion formed between the diameter portions,
The lower surface portion of the cylindrical portion of the upper contact member is provided with a caulking portion that is locked in a state in which the insertion portion is inserted,
The cylindrical portion of the upper contact member is provided with a stopper that is configured to abut the socket main body and restrict upward movement of the upper contact member,
In a state before the socket body is disposed on the wiring board, the lower surface portion of the cylindrical portion is spaced apart from the bottom surface portion by a predetermined amount and is lifted, and the stepped portion is a peripheral portion of the insertion hole. Configured to be locked to
The length of the upper contact portion protruding from the upper surface portion of the socket body is configured such that the lower surface portion of the cylindrical portion is shorter than the length separating the bottom surface portion of the socket body. Socket for electrical parts. 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 electrical component socket according to claim 1, wherein the electrical component socket is provided.

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