JPH0218946Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an IC socket that is attached to a printed wiring board and used for mounting an IC.

Conventional structure and its problems Conventionally, this type of IC socket is as shown in Figures 1 and 2.
As shown in the figure, an IC holding cover 2 is attached to one end of the IC socket base 1 so that it can be opened and closed using a spindle 3.
A lock lever 4 is rotatably attached to the other end of the IC socket base 1 by a support shaft 5 parallel to the support shaft 3.

Then, the IC is placed on the vertically elastic contacts of the IC socket base 1, and the IC is placed above it.
Rotate the presser foot cover 2, and then turn the lock lever 4.
Rotate the protrusion 8 protruding from the lock piece 7.
Groove 9 formed on the outer surface of the free end side of the IC holding cover 2
By engaging with, the IC holding cover 2 is kept closed and the IC is pressed against the elasticity of the contact 6.
It is designed to obtain the contact pressure between the IC and the contact.

In this conventional lock device, the lock lever 4 is rotatably supported by the support shaft 5 parallel to the support shaft 3 of the IC holding cover 2, as described above.
When attaching or removing an IC to or from the IC socket board 1, the lock lever 4 is extended to the side of the IC socket board 1, so a large dead space is formed behind the lock lever, and there is a disadvantage that there are many opportunities for interference with adjacent IC sockets. It was hot.

Also, when the protrusion 8 of the locking piece 8 crosses over the edge of the groove 9 and engages with the groove 9, the presser cover 2 is removed by the depth of the groove 9.
This causes the free end of the cover to float harmfully in the opening direction, making the contact pressure between the contact and the IC uneven between the free end of the cover and the pivot side, and causing poor contact. Also, due to the pushing force of contact 6
The IC holding cover 2 is constantly subjected to rotational force in the disengagement direction, and in order to resist this and ensure engagement, the groove 9
It is necessary to engage the protrusion 8 with a large pushing force, which not only causes poor operability but also tends to cause backlash due to wear.

Purpose of the invention The present invention enables the dead space when the lock lever is opened to be narrowed to the necessary minimum, contributing to the miniaturization of the socket base and the holding cover, and also makes it possible to make the lock lever engage with the IC holding cover. This effectively solves the problem of harmful floating and poor contact caused when the presser cover is pressed.In addition, the push-up force from the contact does not act as a push-up force in the direction of disengaging the presser cover, but rather ensures engagement. It is an object of the present invention to provide a locking device for an IC socket that has good operability and is designed to effectively act as a force for locking the IC socket.

Structure of the Invention In order to achieve the above object, the present invention pivots the lock lever in a direction perpendicular to the rotating direction of the IC holding cover, and connects the hook-shaped portion of the lock lever to the free end of the IC holding cover. The locking protrusion provided near the center of the lock lever is latched from the lateral direction, and the engaging surface of the hook-shaped portion is shaped like an arc around the rotational fulcrum of the lock lever. Both arcuate surfaces are arranged so that they slide into contact with each other as surfaces, and the arcuate surfaces are arranged at a position intersecting a vertical line passing through the rotation fulcrum of the lock lever. is made to act as a force to ensure engagement by the arcuate surface.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 3 to 5, a plurality of contacts 12 are planted on an IC socket base 11. As shown in FIGS.

The contact 12 has an IC mounting portion that is elastically displaced in the vertical direction.
Connecting portions 13 are provided on both sides of one end of this IC socket base 11, and an IC is inserted between these connecting portions 13.
A connecting portion 15 provided in the middle portion of the presser cover 14
is inserted, both connecting parts 13 and 15 are rotatably connected and supported by a support shaft 16, and the IC holding cover 14
can be opened and closed from the top surface of the IC socket board 11. A locking protrusion 17 is provided at the center of the free end side of this IC holding cover 14 so as to project forward, and the base of a locking lever 18 is attached to the center of the other side of the IC socket base 11.
It is pivoted by a support shaft 19 in a direction perpendicular to the support shaft 16 of the IC socket base 11, and is rotatable along the end surface of the IC socket base 11 in a direction perpendicular to the rotation direction of the IC holding cover using the support shaft 19 as a fulcrum. establish.

An arcuate engagement surface 20 that projects upward is formed on the upper surface of the locking protrusion 17. It is formed into an arc shape drawn along the rotation direction of the lock lever 18.

Also, on the inner surface of the leg, which is the shaft support of the lock lever 18, there is a stop surface 2 that engages with the side surface of the above-mentioned latching protrusion 17.
1 is formed, and an arc-shaped engagement surface 23 is recessed on the inner surface of the hook-shaped portion 22 at the upper portion thereof. This engagement surface 23 is similar to the engagement surface 20 described above, and is similar to the engagement surface 20 described above.
The lock lever 18 is formed into an arc shape with a radius centered on a support shaft 19 which is a rotation fulcrum of the lock lever 18 and drawn along the rotation direction of the lock lever 18. In other words, the engaging surfaces 20 and 23 are both arcuate surfaces having the same radius, and engage while slidingly touching each other.

In addition, both the engaging surfaces 20 and 23 are in sliding contact with each other and are engaged on a vertical line They intersect and are formed so that the lengths on both sides bordering on the vertical line XX are approximately equal. Also, the hook-shaped portion 2 in the lock lever 18
An operating part 24 is provided on the upper part of the hook-shaped part 22, and a guide piece 25 is provided on the tip of the hook-shaped part 22. Guide surfaces 26 are formed that are inclined forward and upward so as to gradually move away from each other.

Therefore, in order to lock the IC retainer cover 14 using the locking device of the above embodiment, first the elastic contacts 12 on the IC socket base 11 are locked.
Place the IC. Although not shown, this contact 1
2 has an IC mounting part that is elastically displaced in the vertical direction in the IC mounting part as described above. Then IC
Rotate the presser cover 14 about the support shaft 16.
It is closed onto the IC socket base 11. Before locking, the IC holding cover 14 is supported by the elastic force of the contacts 12.

After that, the IC socket base 11 and the IC holding cover 14 are moved around the lock lever 18 using the support shaft 19 as the starting point.
The cover 14 is rotated in a direction perpendicular to the direction of rotation of the cover 14 along the end face of the cover 14 . This lock lever 18
As the lock lever 18 rotates to an upright position, its inclined guide surface 26 first rides on the locking protrusion 17 on the free end side of the IC holding cover 14 from the side, and as the lock lever 18 rotates, the lock lever 18 is rotated. Engagement surface 23
The arcuate surface forming the engaging surface 2 of the latching protrusion 17
The locking surface 21 rotates while sliding in contact with the arcuate surface forming the 0, and the blocking surface 21 abuts against the side surface of the protruding piece 17 to complete the latching. IC is formed by sliding contact between both arcuate surfaces.
Press down the holding cover 14 and the IC against the elasticity of the contact 12 to obtain contact pressure between the IC and the contact,
During this time, the IC holding cover only rotates in the closing direction and does not float in the opening direction.

Effects of the invention As explained above, this invention has a contact 12
Under the action of the pushing up force, the arcuate surfaces of both the engagement surfaces 20 and 23 are engaged while sliding in contact with each other, and there is no floating. Therefore, the IC holding cover 14 can uniformly press the IC against the contacts 12 and obtain uniform contact pressure. In addition, when both the engaging surfaces 20 and 23 are engaged by sliding contact between the circular arc surfaces, the engaging surfaces 20 and 23 form a vertical line passing through the axis of the support shaft 19, which is the center of rotation of the lock lever 18. X-
Since the contact 12 is located on the X-axis, even if a force in the opening direction is applied to the IC holding cover 14 due to the repulsive elasticity of the contact 12, that force acts as a pushing force on the line X-X of the engaging surface 23 of the lock lever 18. Therefore, since no force is applied to the lock lever 18 in the opening direction, there is no fear of it coming off, and the IC holding cover 14 can be reliably locked to the IC socket base 11.

Also, an IC holding cover 1 is pivotably supported at one end of the IC socket board 11 so as to be openable and closable from the top surface of the socket board.
4, a lock lever 18 having a horizontal hook-shaped portion 22 is arranged at the other end of the IC socket board 11, and the lock lever 18 is aligned along the other end surface of the socket board in the direction of rotation of the IC holding cover 14. A latching protrusion 1 is rotatably supported in orthogonal directions and protrudes from the center of the free end of the IC holding cover 14.
The lock lever 18 is laterally rotated and latched onto the upper surface of the IC socket base 11, and the lock lever 18 can be rotated along the end surface of the IC socket base 11 to achieve engagement. There is an advantage that dead space can be kept to a minimum, and therefore miniaturization can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an IC socket with a conventional locking device, Fig. 2 is a partially cutaway front view thereof, and Fig. 3 is a perspective view of an IC socket with a conventional locking device.
5 to 5 show an IC socket equipped with a locking device according to an embodiment of the present invention, and FIG. 3 is a perspective view thereof,
FIG. 4 is a side view of the same, and FIG. 5 is a front view of the same. 11...IC socket base, 12...elastic contact, 14...IC holding cover, 16...support shaft,
17...Latching protrusion, 18...Lock lever, 1
9... Support shaft, 22... Hook-shaped portion, 20, 23...
...A circular arc-shaped engagement surface.

Claims (1)

[Scope of utility model registration request] At one end of the IC socket board, an IC holding cover that opens and closes to the top surface of the socket board is rotatably supported.
A lock lever is rotatably supported on the other end of the IC socket board, and the lock lever is engaged with the free end of the IC holding cover to keep the holding cover closed. The IC mounted on the contact shape was pressed against the elasticity of the contact to obtain contact pressure.
In the IC socket, the lock lever is pivotally supported along the other end surface of the IC socket base so as to rotate in a direction perpendicular to the rotation direction of the IC holding cover;
The lock lever is disposed approximately at the center of the other end of the socket base, and a locking protrusion is provided at approximately the center of the free end of the IC holding cover, and the lock lever is attached to the lock lever by rotation from the orthogonal direction of the lock lever. The hook-shaped portion is laterally latched onto the upper surface of the above-mentioned latching protrusion of the free end of the IC presser cover in the closed state, and the latching protrusion of the IC holder cover and the latching protrusion are The engagement surface with the hook-shaped portion of the lock lever that is latched on the protrusion is an arcuate surface that engages with the lock lever around the rotational fulcrum of the lock lever;
A locking device for an IC socket, characterized in that the arc-shaped engagement surface is arranged at a position intersecting a vertical line passing through a pivot point of the lock lever.