JP2004355983A - Ic socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coming-off prevention means for preventing coming-off of a contact holding plate by providing a protrusion or a recessed part at the contact arrangement plate and by suppressing flexibility of an arm portion capable of elastic displacement. <P>SOLUTION: The IC socket comprises a base substrate, a contact holding plate which is inserted and fitted on the base substrate, a contact arrangement plate which arranges in a row the terminal portion of the contact implanted on this contact holding plate, a locking means arranged at the insertion portion where the contact holding plate is inserted in the base plate so as to be engaged in free locking and separation, and a coming-off prevention means which is provided at the contact arrangement plate and prevents that the contact holding plate comes off by being released of the engagement of the locking means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an IC socket having a base substrate and a contact holding plate, and more particularly, to an IC socket having improved means for fixing the contact holding plate to the base substrate.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a package for an electronic component as an electric component, in particular, an IC socket in which an IC package or the like is mounted, a base substrate is mounted on a test board, and a contact holding plate is mounted on the base substrate. Note that this base substrate is a socket frame via a contact sheet.
[0003]
By the way, an IC package is mounted on this IC socket and fixed by a pusher such as a holding plate to form a high frequency test socket. This high-frequency test socket is used for various tests of an IC package. (For example, refer to Patent Document 1).
[0004]
[Patent Document 1]
JP-A-5-326083 (pages 2-3, FIGS. 1-2)
[0005]
In a conventional IC socket, a contact holding plate on which a number of contacts are implanted is fitted into a base substrate forming a socket body, and a hook claw of the base substrate and a projection of the contact holding plate are engaged and fixed. Do it. That is, in the conventional IC socket, the base substrate and the contact holding plate are fixed by such locking means.
[0006]
One example of such a conventional IC socket is shown in FIGS. 8 and 9 schematically show the entire configuration as a central longitudinal sectional view, FIG. 10 shows an enlarged view of a portion A in FIG. 9, and FIG. The state where the arm portion is elastically deformed is shown.
[0007]
As shown in FIGS. 8 to 11, a conventional IC socket 100 includes a base substrate 101 serving as a fixed socket body, a contact holding plate 102 fitted and attached to the base substrate 101, and a contact alignment plate 103. And a plurality of contacts 104, and a grid-like partition plate (not shown) that opens and closes the tips of the contacts 104 so as to open and close the contacts 104. The base substrate 101 has a substantially quadrangular shape, and a plurality of contacts 104 are implanted in the center. The external terminals such as hemispherical solder balls of an IC package are sandwiched between the tips of the contacts 104. It is configured. Such an IC package is provided so that the corners of the four corners are engaged with a positioning portion such as a corner member to be positioned at a central portion on the partition plate.
[0008]
In such a conventional IC socket 100, a locking means 108 is provided for fitting and attaching the contact holding plate 102 to the base substrate 101. The locking means 108 is mounted by engaging a hook claw 110 at the tip of a latch arm 109 provided on the base substrate 101 with a projection 111 of the contact holding plate 102. .
[0009]
That is, the hook-shaped locking means 108 includes a hook claw 110 formed at the tip of an arm 109 projecting downward from the base substrate 101, and projections 111 provided on both sides of the contact holding plate 102, A hook claw 110 of the fixed-side base substrate 101 is provided as a hook-shaped hook at the tip of an elastically deformable arm portion 109. The protrusion 111 of the contact holding plate 102 is formed from a hook-shaped protrusion formed on the side wall on both sides of the contact holding plate 102. The hook-shaped projection 111 of the contact holding plate 102 is formed so as to be engaged and locked.
[0010]
When such an IC socket 100 is mounted on a board 112 such as a printed board or a mounting board, the terminal portions of the contacts 104 protruding downward from the contact alignment plate 103 are inserted into terminal holes of the board 112 and soldered. Securely fixed.
[0011]
[Problems to be solved by the invention]
However, in such a conventional IC socket 100, a gap S is generated between the board 112 and the IC socket 100 after the socket is mounted, so that the contact 104 varies in the vertical direction. Furthermore, there is a degree of freedom in the arm portion 109 protruding from the base substrate 101, and there is a space 114 or the like behind the arm portion 109. For this reason, as shown in FIG. 10, when an impact or force is applied to the base substrate 101 during use, the hook claw 110 comes off the projection 111 of the contact holding plate 102 due to the elastic deformation of the arm 109. As shown in FIG. 11, there are problems such as the contact holding plate 102 coming off the base substrate 101.
[0012]
Accordingly, an object of the present invention is to provide a contact alignment plate with projections or depressions to suppress the degree of freedom of an elastically displaceable arm in order to solve the above-mentioned conventional problems. An object of the present invention is to provide an IC socket provided with a slip-off preventing means for preventing slip-out.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, an IC socket according to the present invention includes a base substrate, a contact holding plate fitted and mounted on the base substrate, and a terminal portion of a contact implanted in the contact holding plate. A contact alignment plate for aligning and arranging the contact alignment plate, locking means disposed so that the contact holding plate is removably engaged with a fitting portion fitted to the base substrate, and a contact alignment plate. And a stopper for preventing the contact holding plate from coming off due to disengagement of the locking means.
[0014]
Further, in the IC socket of the present invention, the locking means has a hook claw at a tip thereof, and the detachment preventing means has a protrusion or a recess for suppressing elastic displacement of an arm of the locking means. It is characterized by being.
[0015]
Other objects, features and advantages of the present invention will become apparent from the following detailed description of the embodiments of the IC socket of the present invention illustrated in the accompanying drawings.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
(Example 1)
FIGS. 1 to 3 show an IC socket according to a first embodiment of the present invention, and FIGS. 4 and 5 show a second embodiment as a modification of the slip-off preventing means. FIGS. Third Embodiment A third embodiment is shown as still another modification of the slip-off preventing means.
[0017]
FIG. 1 is a longitudinal sectional view at the center of an IC socket according to a first embodiment of the present invention. FIG. 2 is a partial sectional view showing one of means for preventing the IC socket from coming off in FIG. 1, and FIG. FIG. 4 is a partial sectional view showing a state in which the IC socket of the present invention is prevented from coming off.
[0018]
As shown in FIGS. 1 to 3, an IC socket 1 according to a first embodiment of the present invention includes a base board 2 forming a fixed socket body, and a contact holding plate 3 fitted and attached to the base board 2. A contact alignment plate 4 for aligning and arranging the terminals of the contacts 5 implanted in the contact holding plate 3, a plurality of contacts 5, and opening and closing operations of the tips of the contacts 5 so as to open and close the contacts 5 And a grid-shaped partition plate 6. The base substrate 2 has a substantially square shape, and is formed so that a plurality of contacts 5 are arranged at the center. A hemispherical solder ball or the like of an IC package is provided between the tips of the contacts 5. Are arranged so as to be sandwiched.
[0019]
Such an IC package is arranged so that four corners are engaged with a positioning member 8 such as a corner member to be positioned at a central portion on the partition plate 6.
[0020]
Further, in the IC socket 1 of the present invention, locking means are provided on both sides of the contact holding plate 3 for fitting and attaching the contact holding plate 3 on which the plurality of contacts 5 are planted to the base substrate 2. 9 are provided. These locking means 9 are attached by engaging a hook claw 12 at the tip of an arm 11 for latch provided on the base substrate 2 with a projection 14 of the contact holding plate 3. I have.
[0021]
That is, the hook-shaped locking means 9 includes an arm 11 protruding downward from both sides inside the base substrate 2, and a hook claw 12 formed at the tip of the arm 11 so as to protrude inward. And the projections 14 provided on both sides of the contact holding plate 3. Further, a hook claw 12 of the fixed-side base substrate 2 is provided as a hook-shaped hook member at the tip of the elastically deformable arm portion 11. Further, the protrusions 14 of the contact holding plate 3 are formed from hook-shaped protrusion members formed on the side walls on both sides of the contact holding plate 3. The protrusion 14 is formed so as to be engaged with and hooked to the hook claw 12 at the tip of the elastically deformable arm 11.
[0022]
When the IC socket 1 of the present invention is mounted on a printed board, a mounting board, or the like, the terminal portions 5e of the contacts 5 protruding downward from the contact alignment plate 4 are inserted into terminal holes of the board and soldered. It is fixed firmly by doing.
[0023]
In such an IC socket 1 of the present invention, a slip-off preventing means 10 is provided to prevent the contact alignment plate 4 from slipping out. These detachment prevention means 10 have projections 16 protruding upward on both sides of the contact alignment plate 4, and the projections 16 are located in the spaces 15 outside the arm portions 11 of the locking means 9. It is formed to be inserted.
[0024]
Therefore, when assembling the IC socket 1 of the present invention, the contact holding plate 3 on which the plurality of contacts 5 are implanted is placed with the tip of the contact 5 upward from below with respect to the base substrate 2 which is the socket body. Inserted. Further, the projections 14 on both sides of the contact holding plate 3 are attached by being engaged with the hook claws 12 of the arm 11 of the contact board 2. In this manner, when the contact holding plate 3 is fitted and attached to the base substrate 2, the terminal portions 5 e of the contacts 5 projecting downward from the contact holding plate 3 are inserted into the holes 17 of the contact alignment plate 4. Attach. Further, as shown in FIG. 2, the projections 16 on both sides of the contact alignment plate 4 are inserted into the space 15 outside the arm portion 11 of the locking means 9 in the direction of the arrow, and the contact alignment plate 4 is It is firmly fixed to the substrate 2. In this case, the terminal portion 5e of the contact 5 is firmly fitted into the hole 17 of the contact alignment plate 4 and attached. Furthermore, by soldering to the contact alignment plate 4, the terminal portions 5e of the contacts 5 can be firmly fixed to the contact alignment plate 4.
[0025]
In this way, after mounting the contact holding plate 3 on which the many contacts 5 are implanted with respect to the base substrate 2, the projections 16 of the contact alignment plate 4 are moved into the space 15 outside the locking means 9. Insert and attach. Therefore, even if an external force acts on the IC socket 1 due to an impact or the like, the elastic deformation of the arm portion 11 of the locking means 9 is suitably suppressed by the projection 16 as shown in FIG. For this reason, the hook claw 12 of the locking means 9 does not come off from the projection 14 of the contact holding plate 3, and the elastic deformation of the arm 11 can be suppressed well.
[0026]
In this embodiment, the protrusion 16 is formed integrally with the contact alignment plate 4, but another member having a similar shape may be used. In this case, a separate member such as a projection can be attached to the contact alignment plate by screwing, bonding, brazing, welding, or the like. Further, it is preferable that the corner of the tip of the projection 16 be rounded or rounded, so that the projection 16 can be smoothly inserted.
[0027]
As described above, in the IC socket 1 according to the present embodiment, the contact holding plate 3 is fitted to and attached to the base substrate 2, and the locking means provided so as to engage with the fitted portion so as to be detachable from each other. A disengagement prevention means 10 is provided for preventing the contact holding plate 3 from being disengaged from the base substrate 2 and disengaging from the engagement. For this reason, in the present embodiment, the elastic displacement of the arm portion 11 of the locking means 9 can be favorably suppressed by the projections 16 provided on the contact alignment plate 4, and the locking means 9 can be prevented from coming off. The projections 16 of the contact alignment plate 4 can suitably prevent the contact holding plate 3 from falling out of the base substrate 2 and falling off.
[0028]
Therefore, the IC socket of the present invention configured as described above has a problem that, in the conventional IC socket, a gap is formed between the board and the IC socket after the socket is mounted, causing variations in the vertical direction of the contact. Can be solved.
[0029]
(Example 2)
FIGS. 4 and 5 schematically show an IC socket locking means and a detachment preventing means according to a second embodiment of the present invention. In the figure, the same members as those in the first embodiment are denoted by the same reference numerals and used.
[0030]
As shown in the figure, in the IC socket according to the second embodiment of the present invention, the slip-off preventing means 20 includes a recess 21 in which the hook claw 12 at the tip of the arm 11 of the locking means 9 is engaged. What is provided on the alignment plate 4 is different from that of the first embodiment.
[0031]
In this embodiment, the locking means 9 is configured in the same manner as the locking means 9 of the first embodiment, and includes an arm 11 projecting downward from both sides inside the base substrate 2, The hook claw 12 is formed to protrude inward at the tip of the contact holding plate 3, and the protrusions 14 provided on both sides of the contact holding plate 3. Further, a hook claw 12 of the fixed-side base substrate 2 is provided as a hook-shaped hook member at the tip of the elastically deformable arm portion 11. The protrusions 14 of the contact holding plate 3 are formed from hook-shaped protrusion members formed on both side walls of the contact holding plate 3. The projection 14 is formed so as to be engaged and locked with the hook claw 12 at the tip of the elastically deformable arm 11.
[0032]
When such an IC socket of the present invention is mounted on a printed board, a mounting board, or the like, as in the first embodiment, the contact has a terminal portion of the contact protruding downward from the contact alignment plate 4 and a terminal of the board. It is firmly fixed by being inserted into the hole and soldered.
[0033]
In such an IC socket 1 of the present invention, a detachment preventing means 20 is provided to prevent the contact holding plate 3 from coming off. The disengagement prevention means 20 is formed by recesses 21 provided at positions on both sides of the contact alignment plate 4 corresponding to the hook claws 12 at the tip of the arm 9 of the locking means 9. The recess 21 is formed such that the hook claw 12 at the tip of the arm 11 of the locking means 9 is located in the recess 21 at the time of assembly, and the portion outside the hook 12 at the tip of the arm 11 is recessed. Is formed so as to be in contact with the wall portion 22.
[0034]
Therefore, in such an IC socket of the present invention, the contact alignment plate 4 is fitted into the base substrate 2 in the direction of the arrow during assembly. The hook claw 12 at the tip of the arm 11 provided on the base substrate 2 protrudes into the recess 21, and is assembled so that the tip of the arm 11 contacts the wall 22 of the recess 21. . In the IC socket of the present invention assembled in this manner, even if an impact or external force is applied to the IC socket for any reason, the tip of the arm portion 11 of the locking means 9 will not The elastic displacement of the arm 11 is suppressed by hitting the wall 22 of the recess 21. For this reason, the tip of the hook claw 12 of the arm 11 does not come off from the protrusion 14 of the contact holding plate 3. Thereby, the hook claw 12 is formed so as not to be disengaged, and is configured to prevent the contact holding plate 3 from falling out of the base substrate 2 and falling off.
[0035]
(Example 3)
FIGS. 6 and 7 schematically show an IC socket locking means and a detachment preventing means according to a third embodiment of the present invention. In the figure, the same members as those in the first embodiment and the second embodiment are denoted by the same reference numerals and used.
[0036]
As shown in the figure, in the IC socket according to the third embodiment of the present invention, the slip-off preventing means 30 stands upright from the contact alignment plate 3 protruding into the space 15 outside the arm portion 11 of the locking means 9. The projection 31 is formed as described above. This embodiment is different from the first embodiment in that a tapered surface 32 is provided inside the tip of the projection 31.
[0037]
In the present embodiment, the locking means 9 includes an arm 11 protruding downward from both sides inside the base substrate 2, and a hook claw 12 formed at the tip of the arm 11 so as to protrude inward. And the projections 14 provided on both sides of the contact holding plate 3. Further, a hook claw 12 of the fixed-side base substrate 2 is provided as a hook-shaped hook member at the tip of the elastically deformable arm portion 11. The protrusions 14 of the contact holding plate 3 are formed from hook-shaped protrusion members formed on both side walls of the contact holding plate 3. The projection 14 is formed so as to be engaged and locked with the hook claw 12 at the tip of the elastically deformable arm 11.
[0038]
When such an IC socket according to the third embodiment of the present invention is mounted on a printed board, a mounting board, or the like, the terminal portions of the contacts protruding downward from the contact alignment plate 4 are mounted on the board in the same manner as in the first embodiment. It is firmly fixed by being inserted into the terminal hole and soldered.
[0039]
Furthermore, in such an IC socket of the present invention, a slip-off preventing means 30 is provided to prevent the contact holding plate 3 from slipping out. As shown in the figure, the detachment preventing means 30 has projections 31 protruding upward on both sides of the contact alignment plate 4. The projection 31 is formed so as to be inserted into the space 15 outside the arm portion 11 of the locking means 9. Further, a tapered surface 32 is provided inside the distal end portion of such a projection 31.
[0040]
In such an IC socket of the present invention, the contact alignment plate 4 is fitted into the base substrate 2 in the direction of the arrow at the time of assembly, and the protrusion of the contact alignment plate 4 is inserted into the space 15 outside the arm portion 11. 31 is inserted. At this time, the protrusion 31 is suitably guided by the tapered surface 32 slid along the outer surface of the distal end portion of the arm portion 11, and is suitably inserted into the space 15 outside the arm portion 11. Therefore, the contact alignment plate 4 can be easily and satisfactorily attached to the base substrate 2 and assembled, and the projections 31 are firmly inserted into the cavities 15. Therefore, even if an impact, an external force, or the like is applied to the IC socket, the arm portion 11 hits the projection 31 and the elastic displacement of the arm portion 11 is suppressed. Of the hook claw 12 does not come off and the hook claw 12 does not come off.
[0041]
In particular, in the third embodiment, by providing the tapered surface 32 on the projection 31, the introduction of the arm portion 11 of the locking means 9 at the time of assembling can be guided well, and the guiding to the regular position can be ensured. Thereby, the assembling can be simplified and the assembling time can be shortened satisfactorily.
[0042]
As described above, in the IC socket of the present invention, a protrusion or a dent is provided on the contact alignment plate, or a tapered surface is provided at the tip of the protrusion to suppress the degree of freedom of the elastically displaceable arm. Then, a means for preventing the contact holding plate from coming off is provided. Thereby, the elastic displacement of the arm portion of the locking means can be favorably suppressed by the protrusion or the recess provided on the contact alignment plate, and the locking means can be prevented from coming off. Further, the contact holding plate can be suitably prevented from coming off by the contact alignment plate.
[0043]
Furthermore, in such an IC socket of the present invention, a recess in which the hook claw portion at the tip of the arm of the locking means is engaged is provided on the contact alignment plate, so that the tip of the arm can be assembled at the time of assembly. Is hooked into the recess, so that the tip of the arm comes into contact with the wall of the recess. Therefore, even if an impact, an external force, or the like is applied to the IC socket, the distal end portion of the arm portion comes into contact with the wall of the recessed portion, and the elastic displacement of the arm portion of the locking means is suppressed. Of the hook claw does not come off.
[0044]
In addition, since a tapered surface is provided at the tip of the protrusion formed on the contact alignment plate, the guide of the arm portion of the locking means can be surely and easily performed, so that assembly can be performed smoothly and assembly time can be reduced. Can be.
[0045]
【The invention's effect】
As is clear from the above description, according to the IC socket of the present invention, by providing the IC socket with the slip-off preventing means for preventing the contact holding plate fitted and attached to the base substrate from slipping out, the IC socket is subjected to impact or external force. The contact holding plate does not come off even if the above-mentioned operation is performed.
[Brief description of the drawings]
FIG. 1 is a central longitudinal sectional view of an IC socket according to a first embodiment of the present invention.
FIG. 2 is a partial sectional view showing one of slip-out preventing means in the IC socket of the present invention shown in FIG.
FIG. 3 is a partial sectional view showing a state in which the IC socket of FIG. 2 is prevented from coming off.
FIG. 4 is a partial cross-sectional view showing one means for preventing an IC socket from coming off according to a second embodiment of the present invention.
FIG. 5 is a partial sectional view showing a state in which the IC socket of FIG. 4 is prevented from coming off.
FIG. 6 is a partial sectional view showing one of IC socket detachment preventing means according to a third embodiment of the present invention.
FIG. 7 is a partial sectional view showing a state in which the IC socket of FIG. 6 is prevented from coming off.
FIG. 8 is a central longitudinal sectional view schematically showing the entire configuration of a conventional IC socket.
FIG. 9 is a central vertical sectional view when the conventional IC socket of FIG. 8 is mounted on a board.
FIG. 10 is an enlarged partial view of a portion A in FIG. 9;
FIG. 11 is an enlarged partial view showing an elastically deformed state of FIG. 10;
[Explanation of symbols]
1, 100 IC socket 2, 101 Base substrate 3, 102 Contact holding plate 4, 103 Contact alignment plate 5, 104 Contact 6, Partition plate 7 Mounting member 8, Positioning member 9, 108 Locking means 10, Pull-out prevention means 11, 109 Arm part 12, 110 Hook claw 14, 111 Projection 15 Void 16, 31 Projection 17 Hole 20, 30 Dropout prevention means 21 Depression 22 Wall 32 Tapered surface 112 Board 114 Void

Claims (2)

A base substrate,
A contact holding plate fitted and mounted on the base substrate,
A contact alignment plate for aligning and arranging the terminal portions of the contacts implanted in the contact holding plate,
Locking means disposed so that the contact holding plate is removably engaged with a fitting portion fitted to the base substrate;
Detachment preventing means provided on the contact alignment plate to prevent the engagement means from being disengaged and preventing the contact holding plate from slipping out;
An IC socket comprising: The said locking means has a hook claw at the front-end | tip, and the said detachment prevention means is a protrusion or recessed part for suppressing the elastic displacement of the arm part of the said locking means, The Claims characterized by the above-mentioned. 1. The IC socket according to 1.

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