KR0157407B1 - Shutter mechanism of contact in ic socket - Google Patents

Abstract

The present invention simultaneously solves the point where the push-down force becomes excessive and the push-down stroke becomes excessive, and the opening operation of the contact at the limited push-stroke or with the reduced push-down force, that is, the rear displacement In this way, the above-described advantages of the IC socket can be effectively obtained, and thus, a socket body having a plurality of contacts arranged to be in contact with the terminal of the IC package; A contact pressing member for elastically resisting the contact at the time of rearward displacement to release the contact and at the same time releasing the IC mounting portion, and for providing a rearward displacement force to the contact on the contact opening and closing member. An IC socket formed by providing a back displacement force to the contact. And added contact pressure is formed by the inclined surface, the inclined surface is gently pressed by the front end portion side, the rear end is formed as a sharply inclined face pressure.

Description

Contact opening and closing mechanism in IC socket

1 is an IC socket plan view showing an embodiment of the present invention.

2 is a side view showing a partial cross-sectional view of the same IC socket.

3 is a sectional view of an essential part of an IC socket, showing an IC package mounted state.

4a, b, and c are cross-sectional views of the main parts, in order to explain an operation of rearwardly displacing the contact by pushing down the contact opening and closing member,

4A shows a state in which a contact is started to fall from an IC terminal by initiating pushing by acting a light inclined surface.

FIG. 4B is a state in which the contact is rearranged by pushing forward and acting on the rear steep slope.

4c each show a state in which the rear displacement is terminated by completing the pushing down;

5a, b and c are cross-sectional views of the main part showing an embodiment in which the shear mild slope is an arc surface in correspondence with the operation of FIGS. 4a, b and c.

Fig. 6 is a cross-sectional view of the contact pressing portion of the first step inclination, showing an embodiment used in combination with the contact pressing portion of the two step warp.

* Explanation of symbols for main parts of the drawings

1: socket body 2: IC package

3: IC terminal 4: contact

5: Sudanja 6: curved elastic piece

7: fixed end 8: contact piece

9: contact protrusion 10: letter arm

11: pressurized receiving part (押 12) Contact opening and closing member

13: IC receiving window 14: IC mounting part

15: protrusions 16: Terminal Support Seat

21: pressurization portion 21a: mildly inclined surface

21b: steep slope

The present invention relates to a contact opening and closing mechanism in an IC socket, which enables opening and closing of a contact provided in a socket main body by shanghai east of a contact opening and closing member. According to Japanese Patent Laid-Open No. 62-160676, a socket main body is provided with a contact opening and closing member supported at a high position by a contact, and by pushing down the contact opening and closing member, the contact is resisted to elasticity and rearranged to the IC terminal. A contact release state is formed, and the IC mounting portion is released to provide the IC package for loading and extraction, and a pressing portion for applying a rear displacement force to the contact is a right angle plane, and the contact is a right angle plane. The rearward displacement is obtained by pushing the rear projection end of the cylinder vertically.

The contact is forward-displaced by self-resilience elasticity, and the contact surface with the restoring elasticity is pressed against the upper surface of the terminal of the IC package supported by the bedside of the socket body, and the force is pushed into the contact pressing unit to open and close the contact The member is held at a high position to prepare for the next contact release operation.

Since the foregoing prior art pushes the IC terminal from above the contact and holds it in the IC socket body, the means for holding the IC package in the IC socket is simplified, and in addition, the prior art merely pushes the contact back to the rear just by pushing the contact opening and closing member. By changing the position, the IC package can be released, and the IC package can be immediately extracted or reloaded and immediately responded to the automation by the robot. It is easy to use, and it is used a lot because it is safe to touch and reliable.

While the above-described prior art has the above advantages, the pushing force is excessively exerted to displace the contact back in the direction substantially orthogonal to the vertical direction by pushing down in the vertical direction of the contact opening and closing member, which is a major disadvantage. have.

For example, a 40-pin general purpose IC socket requires about 1.6 kg of push-down force, which limits the number of IC sockets that can be pushed down temporarily using a robot, and is effective for IC measurement tasks. This is the cause of lack.

This tendency becomes more remarkable with the increase in the number of poles and the increase in the number of IC sockets, and the improvement is a problem.

By the way, Japanese Patent Laid-Open No. 62-93964 proposes that the above contact pressing portion be inclined in order to deal with the above problems, but according to this proposal, the pushing force is reduced, but the pushing stroke is Compared with the above-described prior art, it is more than doubled according to the inclination angle, and a new problem arises that the contact cannot be moved sensitively and the enlargement and opening are not perfect.

The present invention simultaneously solves the fact that the pushing force in the first preceding example becomes excessive and the pushing stroke in the second leading example becomes excessive, thereby reducing or reducing the limited pushing stroke. The opening operation of the contact, i.e., the rearward displacement, can be performed by the pushed down force, thereby making it possible to effectively obtain the above-mentioned advantages of the IC socket.

According to the present invention, in the IC socket which pushes the contact opening / closing member, the contact is displaced back to release the contact, and the IC mounting part is released. The inclined surface of the contact opening / closing member is used as the inclined surface, and the inclined surface is used as the inclined surface in the front pressing portion, and the inclined surface in the rear pressing portion is used as the inclined surface. In this case, a larger initial displacement (rear displacement) is caused, and in the second half of the contact elasticity is increased, a steep slope is applied to cause residual displacement.

In the initial stage of elastic displacement, the contact formed of the elastic material as described above is weak in elasticity and can be displaced by a small force. As the displacement progresses, the elasticity becomes stronger and requires a large displacement force. The present invention makes use of this property in the early stages of elastic displacement with a small displacement force, so that the mildly inclined surface acts on the contact to secure a larger rearward displacement, and in a region where the displacement force thereafter becomes stronger. The steep slope was applied to reach the target displacement while drastically reducing the pushing force.

As a result, the pushing down force of the contact opening and closing member as a whole is reduced, and the amount of rearward displacement required in the limited pushing stroke is obtained.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

The socket body 1 has a plurality of contacts 4 arranged to contact the plurality of terminals 3 of the IC package 2. As shown in FIG. 3, the terminal 3 of the IC package 2 has a front end that protrudes laterally parallel to each other at two opposite sides thereof, and is bent in two stages to be approximately horizontal.

In addition, the contact 4 has a means 5 protruding below the socket body from the fixed end 7 planted in the socket body 1, as shown in FIG. It has a curved elastic piece 6 provided in succession. The curved elastic piece 6 protrudes toward the front side (on the IC package 2 side), and the contact piece 8 is successively provided on the upper end of the curved elastic piece 6. The contact piece portion 8 protrudes from the protruding side (front side) of the curved elastic piece 6, and a downward contact protrusion 9 is formed at the front end thereof.

In addition, the letter arm 10 is extended from the upper end of the contact, that is, the contact piece 8 to the rear. One end of the letter arm 10 extends to the contact piece 8, the other end is a free end, and the pressure receiving part 11 opened and closed by the contact opening and closing member described later on this free end protrudes upward. do.

The upper end of the upwardly protruding piece forming the pressing receiving part 11 is the pressing point P ₂ by the contact opening and closing member, and the lower end of the contacting protrusion 9 of the contact piece 8 is the lower end of the IC package 2. The contact point P ₁ with the terminal 3 is set so that the pressing point P ₂ is positioned above the horizontal line passing through the contact point P ₁ .

The illustrated letter arm 10 extends from the contact piece 8 to the contact point P ₁ or less and bends back into a hook to form the upwardly protruding piece (pressure receiving part 11). The contact (4) is a terminal (3) in which the contact protrusion (9) of the contact piece (8) is supported on a terminal support seat (16) provided on the bottom surface of the IC package mounting portion (14) of the socket body (1). Pressure contact from the inclined top of the top of the distal end of the.

Thereby, the terminal 3 is clamped by the support seat 16 and the contact which were fixed, and the IC package 2 is hold | maintained.

The terminal support seat 16 is used as an electrical contact surface with the fixed terminal, and the contact terminal 4 is provided with a fixed terminal that manifests the contact surface, so that the upper and lower surfaces of the IC terminal can be double-sided contact. 12 is a contact opening and closing member for applying a force pushing down on the pressure receiving portion 11 of the contact 4, the socket body (1) is coated so as to be movable.

As shown in Figs. 1 and 2, the contact opening and closing member 12 has an IC accommodating window 13 in the center thereof, and an IC mounting part of the socket body 1 directly under the IC accommodating window 13. (14) is formed. The IC mounting portion 14 has a protrusion 15 for supporting the substrate portion of the terminal 3 of the IC package 2, and the IC package 2 supports the terminal 3 in the protrusion 15. Positioning is achieved by regulating the side of the main body or the bent end of the terminal 3. At this time, the distal end of the terminal 3 is supported by the terminal support seat 16 on the outside of the protruding tub 15 and is installed at the correct position.

The contact 4 is arranged along the opposing surface of the IC mounting portion 14, and the contact piece 8 of the contact 4 is formed in the opening 17 formed on the outer side of the terminal support seat 16. It is accommodated, the contact protrusion 9 is brought into contact with the surface of the terminal support seat 16, and the elasticity is stored, and the so-called preload is placed.

As a result, the terminal support seat 16 pushes the contact portion P ₁ in the direction in which the curved elastic piece 6 is stretched.

The contact opening / closing member 12 includes a pair of pushing down operation portions 18 on the left and right outer sides of the IC receiving window 13. Guide groove 20 in which the engagement paper 19 is erected from the opposite side wall of this pushing operation part 18, and this engagement paper 19 is formed in the opposite side wall of the socket main body 1. As shown in FIG. Smoothly inserted into the guide groove 20, and the shanghai-dong is enabled according to the guide groove 20. When the contact opening / closing member 12 rises a certain amount of the engagement click provided at the front end of the engagement paper 19, The rising dead point of the opening / closing member 12 is determined by engaging with the end portion.

The contact opening / closing member 12 is pushed upward by the pressure receiving part 11 of the contact, and forms a waiting state for pushing down.

In addition, the pushing down operation part 18 protrudes and installs the partition 27 which intervenes between the pressure receiving parts 11 of the said contacts downward, and at the valley part between these partitions 27, The pressing part 21 which applies a pressing force to the press receiving part 11 of the contact 4 is formed.

The pressing portion 21 is a downwardly inclined surface that is ascending inclined toward the rear of the contact, and the inclined surface is again a mildly inclined surface 21a in the front pressing portion, and a steeply inclined surface 21b in the rear pressing portion. FIG. 4 shows an embodiment in which both the front mild slope 21a and the rear steep slope 21b are straight surfaces, and FIG. 5 shows an embodiment in which the shear gentle slope 21 is an arc surface.

4a, b, and c, as shown in Figs. 5a, b, and c, in the upper standby state of the contact opening and closing member 12, a pushing force is applied to the pushing down operation unit 18, When the pressing portion 21 descends in the vertical direction, the pressing point P ₂ of the pressing portion 11 of the contact 4 slides the lightly sloped surface 21a of the front end forming the pressing portion 21. While the transition to the steep slope 21b at the rear end is carried out, the lower initial slope displacement of the contact 4 is obtained at a smaller push stroke by the push-down action of the gentle slope 21a at the front end. With the pushing force alleviated by the pushing action of 2b), the remaining rear displacement amount is obtained to achieve the target rear displacement amount.

That is, when the pressing force is applied to the pressure receiving part 11, the shear gentle slope 21a acts on the pressing point P ₂ to elastically resist the curved elastic piece 6 to displace the letter arm while rapidly rearranging the arm. a higher position from the (pressure point), side dead point with the trajectory toward the back, and the initial rearward displacement of the rear end sharply inclined face (21b) back to the same effect through the dead center (上死点) of a circle centered on the contact point p ₁ The target displacement amount is reduced by the reduced force, and the contact contact piece 8 is reliably spaced apart from the terminal 3 to bring it into a contact release state, and the IC mounting portion 14 is released. Preferably, the letter arm 10 and the contact piece 8 are rigid against pressure. )

According to the present invention, the contact 4 formed of the elastic material may be initially displaced by a small force due to its weak elasticity, and may be elastically displaced by a small displacement force by using a property of increasing elasticity as the displacement proceeds. In the above method, the front end gentle slope 21a is applied to the contact 4 to secure a greater rearward displacement, and in the latter half of the elasticity, the rear end steep slope 21b is applied to drastically reduce the pushing force. In doing so, it causes residual displacement to reach the target displacement amount.

This reduces the pushing force of the contact opening / closing member 12 as a whole, and obtains the required amount of rearward displacement with a limited pushing stroke.

In this way, the contact piece 8 is formed in a state sufficiently separated from the interference with the IC package 2, and the IC mounting portion 14 including the terminal support seat 16 is released. In the same state, the IC package 2 is extracted or mounted on the IC mounting portion 14 via the IC accommodation window 13.

In addition, when the pushing force of the contact opening / closing member 12 to the pushing down operation unit 18 is released, the opening / closing member 12 serves as a restoring force of the curved elastic pieces 6 and the letter arm 10 of the contact 4. While being pushed upward, supported at a raised position, and shaped again to push down, the contact 4 displaces the contact piece 8 forward in the restoration, and the contact projection 9 It comes to contact each with a constant contact pressure from the inclined upper side to the upper end of the terminal (3) supported by the terminal support seat (16).

This contact pressure is the sum of the elasticity previously saved by the pushing force of the terminal support seat 16 and the elasticity generated corresponding to the thickness of the terminal 3.

As described above, the IC package 2 is sandwiched between the terminal support seat 16 and the contact protrusion 9 of the contact piece 8 and is held by the socket body 1. When the pushing down operation unit 18 of the contact member 12 is pushed down again from the contact state, the contact 4 is displaced in the same manner as described above, and the contact with the IC package 2 is released to be in an inferior state. In the state, the IC package 2 is attached and detached.

The pushing down operation of the contact opening and closing member 12 can be performed by the vertical movement of the manipulator of the robot. In the above embodiment, the case in which the contact 4 is provided on two sides opposite to the left and right of the IC mounting portion 14 of the socket body 1 is shown. It can also be carried out in the case of a stool.

In this case, the pushing down operation part 18 of the said contact opening-and-closing member 12 can be provided in left and right, front and back of the IC accommodation window 13 correspondingly. As an example, the pressurizing portion (1) may be provided to correspond to each of the entire contacts (4) owning the pressing portion (21) having the shear mild slope (21a) and the trailing edge steep slope (21b) described above, or having a two-stage slope ( 21 is provided in correspondence with each of a limited number of contacts 4 in all the contacts. In the latter case, as shown in FIG. 6, the conventional one-stage inclined surface 21c with respect to the other contacts 4; The pressurization part 21 'which has a 2nd inclined surface and the pressurization part 21' of a 1st inclined surface are used together.

According to the present invention, a contact formed of an elastic material may be elastically displaced with a small displacement force by using a property that the elasticity is weak at the initial stage and may be displaced with a small force, and the elasticity is enhanced as the displacement progresses. In this case, the front loose slope is made to act on the contact so that a larger amount of rearward displacement can be ensured, and in the rear where the elasticity is enhanced, the residual displacement is drastically reduced while acting on the trailing edge steep slope. It is possible to reach the target displacement amount, thereby reducing the pushing force of the contact opening and closing member as a whole, and obtaining the rear displacement amount required in the limited pushing stroke.

In this way, the present invention simultaneously solves the point where the pushing force in the first example is excessive and the point of the pushing stroke in the second example is excessive, and the limited pushing stroke and the reduced The goal of obtaining the rearward displacement of the contact by the pushing force is achieved so that the advantage of the IC socket can be effectively shown.

Claims (3)

A socket main body having a plurality of contacts arranged to contact a terminal of an IC package, and a movable body is installed on the socket main body, and the contact is elastically resisted to be rearranged when pushed down to release the contact, An IC socket provided with a contact opening / closing member for releasing an IC mounting portion and having a contact pressing portion for imparting a rearward displacement force to the contact on the contact opening / closing member, wherein the contact imparting a rearward displacement force to the contact. A contact opening and closing mechanism in an IC socket, wherein the pressing portion is formed by an inclined surface, and the inclined surface is formed by the front pressing portion with a gentle slope and the rear pressing portion with a steep slope. 2. The contact opening and closing mechanism of an IC socket according to claim 1, wherein both the mildly inclined surface of the front end and the steeply inclined surface of the rear end are made into straight surfaces. The contact opening and closing mechanism of an IC socket according to claim 1, wherein the mildly inclined surface of the front end is formed into an arc-shaped surface.