JPH033992Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a locking mechanism for an IC retainer cover in an IC socket, and relates to the locking mechanism suitably used, for example, in a measurement IC socket where ICs are frequently attached and detached.

Prior Art The IC retainer cover of an IC socket is used to bring contacts provided on the socket base into pressure contact with the contact elements of the IC and to hold the IC mounted. A locking mechanism to maintain the state is essential.

As this locking mechanism, for example, as shown in FIG. 7, an IC holding cover 2 which can be opened and closed on the socket base 1 is rotatably pivoted to one end of the socket base 1 via a shaft 4a. A lock lever 3 is pivotally attached to the other end of 1 via a shaft 4b,
After closing the IC presser cover 2, lock lever 3
The locking protrusion 3a provided on the free end of the lever 3 slides over the surface of the locking protrusion 2a provided on the free end of the IC holding cover 2, and the protrusion The IC is inserted into the groove 2b formed on one side of 2a.
Holding the presser cover 2 closed and connecting it to the contact 6 above.
It maintains contact with the main part of the IC contact.

As another conventional example, the IC retaining cover 2 is formed separately from the socket base 1 without being pivotally connected to it, and after closing the IC retaining cover 2 to the socket base 1, the lock lever 3 pivotally attached to the socket base 1 is attached to the upper surface of the IC retaining cover 2. There is one that is designed to be engaged in a proper position to maintain its closure. Further, the lock lever 3 is rotatably connected to the socket base 1, or alternatively, the lock lever 3 is pivotally connected to the IC holding cover 2 so as to engage with the socket base 1.

Problems to be Solved by the Invention However, in the conventional example shown as a representative example in FIG. Since the locking protrusions 2a and 3a are configured to engage with each other in a short period of time, when an IC such as an IC measurement socket is frequently attached and detached, and therefore when the lock lever 3 is frequently engaged and detached, the locking protrusions 2a and 3a will wear out in a short period of time. In this case, play or floating occurs in the IC holding cover 2, making the IC holding and holding unstable, resulting in poor contact, which significantly reduces reliability, and even if the value is sound, the entire socket board must be discarded. This resulted in a significant reduction in the product life cycle.

The above problem also occurs when the lock lever is provided on the IC holding cover.

Means for Solving the Problems The present invention provides a means for solving the above-mentioned problems, in which, in an IC socket equipped with the IC holding cover and the lock lever, the lock lever locking protrusion formed on the IC holding cover or the lock lever is provided. The IC presser cover locking protrusion formed in the above is formed of a wear-resistant member having a smooth surface, and the surface of the wear-resistant member is used as an engagement surface to obtain the above-mentioned engagement and disengagement by the above-mentioned rotating lock lever. As a result of this structure, the problem of early wear of the locking protrusion due to repeated engagement and disengagement of the lock lever, as well as the above-mentioned problems caused by this, are very effectively eliminated, and the socket can be used for a long time.

Further, the locking protrusion made of the wear-resistant member is provided so as to be freely rotatable to reduce frictional resistance during engagement, thereby improving the above-mentioned effect.

Further, the locking protrusion is constructed of a shaft member or a ball made of a wear-resistant material, and is also intended to reduce frictional resistance.

According to the present invention, the above-mentioned configuration allows the locking protrusion to rotate when the lock lever is engaged and disengaged, and also exhibits wear resistance to reduce wear at the sliding portion of the locking protrusion. It is possible to maintain the engaged area in good condition even after repeated engagement and disengagement, and eliminates the problems caused by the play and floating of the IC retainer cover caused by conventional wear. It is possible to effectively solve the problem and extend the life of the IC socket, and at the same time maintain the locking part of the lock lever with high precision to retain the IC.
To maintain contact safely and soundly, and to provide highly reliable IC sockets.

Embodiments Each embodiment of the present invention will be described below with reference to the drawings.

FIRST EMBODIMENT (See FIGS. 1A to 1D) In the figure, reference numeral 1 indicates a socket base having a large number of contacts 6 arranged to make contact with contact elements 5a of an IC 5. An IC holding cover 2 that can be opened and closed on the socket board 1 is rotatably provided via a shaft 4a, and the IC holding cover 2 is closed to close the IC holding part 1a of the socket base 1.
The IC 5 mounted on the IC 5 is held between the socket base 1 and a pressing force is applied to maintain contact between the contact element 5a of the IC and the contact 6, and a lock lever 3 is attached to the other end of the socket base 1. axis 4b
The lock lever 3 is rotatably provided through the
It is configured to engage with the upper surface of the IC holding cover 2 to hold and maintain contact with the IC.

As the engaging means, a locking protrusion 2 is provided at the free end of the IC holding cover 2 and the lock lever 3.
a and 3a are provided respectively.

The locking protrusion 2a of the IC holding cover 2 is formed of a wear-resistant shaft member having a smooth surface, for example, a metal shaft with an elastic surface plated, and the shaft member is connected to the IC. A guide extending from one side of the free end of the presser cover 2 to the other side, and adjacent to one side along the longitudinal direction of the shaft member serving as the locking protrusion 2a, with an upward slope toward the protrusion 2a. Surface 2c
will be established. The upper end of the guide surface 2c extends from the dead center on one side of the shaft member, which is the locking protrusion 2a, to the top dead center _P2.
Place it at position _P1 close to the center.

Further, on the other side of the locking projection 2a, there is provided a groove 2b for receiving the locking projection 3a of the lock lever 3, which has a bottom surface at a position past the top dead center of the locking projection 2a. The locking protrusion 3a of the lock lever 3 slides over the surface of the locking protrusion 2a made of the wear-resistant shaft member and is received in the groove 2b.
It slides into engagement with the IC holding cover 2 and becomes locked, thereby holding the IC and maintaining the contact between the contact 6 and the IC contact element 5a.

The contact 6 has bending elasticity in the vertical direction, the contact element 5a of the IC 5 is placed on the contact, and the locking protrusion 3a of the lock lever 3 is attached to the contact 6 as shown in FIG. While bending it downward against the elasticity of the IC holding cover 2, it overcomes the locking protrusion 2a of the IC holding cover 2 and achieves the above-mentioned engagement. That is, the locking protrusion 2a of the IC holding cover 2
initially hits the guide surface 2c, and while pushing down the guide surface 2c against the elasticity of the contact 6, the guide surface 2c guides the shaft member to a position past the side dead center of the locking protrusion 2a. P ₁ is reached, and from the same position, while sliding on the surface of the locking protrusion 2a, it is further pushed down against the elasticity of the contact 6, and then it crosses the top dead center P ₂ and engages the above engagement. fulfill. The engaged state is maintained without play by the upward restoring force of the contact 6.

Alternatively, bending elasticity is imparted to the shaft member serving as the locking protrusion 2a, and depending on the bending elasticity, the locking protrusions 2a and 3a are allowed to cross over each other and slide into engagement with each other.

Second embodiment (see Figure 2) This embodiment is closed to the socket base 1 described above.
An IC holding cover 2 is provided separately without being pivotally connected to the socket board 1, and the IC holding cover 2 applies holding force to the IC 5 mounted on the socket board 1 to connect the contact element 5a of the IC to the contact 6. In addition to maintaining contact, locking protrusions 2a are provided at both ends of the IC holding cover 2, and each of the locking protrusions 2a is formed of a wear-resistant shaft member. Lock levers 3 are rotatably attached to both ends of the socket base 1 via shafts 4b, and as the lock levers 3 rotate, the engagement protrusions 3a provided on the levers 3 are attached to the socket base 1 at both ends thereof. It slides and engages with the locking protrusion 2a of the IC holding cover 2 as shown in the figure.
Holding the IC holding cover 2 closed and contact 6
A case is shown in which the IC contact element 5a is configured to maintain contact.

Third Embodiment (See Figure 3) In this embodiment, a locking protrusion 2a' is provided at one end of the socket base 1, and an IC holding cover 2 is provided at the other end.
A lock lever 3 is rotatably attached to the free end of the IC presser cover 2 via a shaft 4b, and after the IC presser cover 2 is closed. The lock lever 3 is configured to rotate and engage with a locking protrusion 2a' provided on the socket base 1, and the locking protrusion 2a' is formed of a wear-resistant shaft member. A case is shown in which the surface of the shaft member is used as the engagement surface and the engagement is achieved while sliding.

Fourth Embodiment (See Figure 4) While each of the above embodiments shows the case where the locking protrusion 2a provided on the IC holding cover 2 is formed of a wear-resistant material, this embodiment 1 shows a case where the engaging protrusion 3a of the lock lever 3 is formed of a wear-resistant shaft member.

As in each of the above embodiments, the locking protrusions 2a, 3
(a) In the case of mutual engagement, one or both of the locking protrusions is formed of a wear-resistant shaft member. If the locking state is formed by providing a locking protrusion 2a or 3a on only one side as shown in FIG. 3, only the protrusion is made of a wear-resistant material.

Fifth Embodiment (See FIGS. 5A and 5B) In this embodiment, the locking protrusion 2a provided on the IC holding cover is formed of a shaft member, and the shaft member is connected to the support shaft 9b. It has a compound shaft structure with a cylindrical shaft 9a that is loosely inserted into the support shaft 9b, and both ends of the support shaft 9b are connected to the IC holding cover 2.
When the cylinder shaft 9a is configured to be rotatably supported by the cylinder shaft 9a, and the locking protrusion 3a of the lock lever 3 climbs over the cylinder shaft 9a while rotating it to achieve the engagement. It shows.

Sixth embodiment (see Figures 6A, B, and C) In this embodiment, the locking protrusion 2a provided on the IC holding cover 2 (or the locking protrusion 3a provided on the lock lever 3) has a wear-resistant structure. A case is shown in which the structure is made up of a sex ball 10. For example, as shown in FIG. 6B, the wear-resistant balls 10 are formed by providing a groove 11 on the surface of the IC holding cover 2, and inserting a plurality of the balls 10 from one end of the groove 11 so as to arrange them in a row. , retainer 12
to prevent it from falling off from the introduction part, and to hold it rotatably within the groove 11. To ensure smooth rotation, a gap 13 is provided between the inner surface of the groove 11 and the ball 10.
form.

In this embodiment as well, a guide surface 2c is provided and the upper end of the guide surface 2c is positioned before the top dead center of the ball 10.

In the first to fifth embodiments described above, the locking protrusions 2a, 2a', and 3a formed of a wear-resistant member are rotatably provided as in the sixth embodiment.

Effects of the Invention As explained above, according to the present invention, the locking protrusion made of a slippery wear-resistant member rotates when the lock lever is engaged and disengaged due to the above structure. By fundamentally solving the problem of wear and deterioration in the parts, it is possible to keep the engaged parts healthy for a long time, even if they are repeatedly engaged and disengaged in IC measurements, for example, and eliminate the harmful effects caused by wear as in the past. This effectively solves problems such as play and floating of the IC retainer cover, poor IC retention, and poor contact caused by this, and extends the life of the IC socket. maintains high accuracy to ensure stable and healthy IC retention and contact retention, resulting in highly reliable
It is possible to provide IC sockets. Therefore, it is possible to significantly reduce the financial burden on users who are forced to replace lock levers in a short period of time due to defects, and also to improve the reliability of measurement, thereby effectively solving problems with a simple configuration. was completed.

[Brief explanation of the drawing]

Fig. 1 shows the first embodiment of the present invention, and Fig. 1A shows the first embodiment of the present invention.
Figure B is a perspective view showing the IC socket in the unlocked state, Figure B is a perspective view showing the IC holding cover in the closed state, Figure C is the same perspective view showing the IC socket in the locked state by the lock lever, Figure D is the same perspective view. 2 is an enlarged side view showing the process of the locking protrusion reaching the engaged state, FIG. 2 is a partially cutaway side view of the IC socket showing the second embodiment in the unlocked state, and FIG. FIG. 4 is a partially cutaway side view of the IC socket showing the third embodiment in the locked state, FIG. 4 is a partially cutaway side view of the IC socket showing the fourth embodiment in the unlocked state, and FIG. 5 is the fifth embodiment. Figure A is a partial perspective view of the IC holding cover with the shaft member disassembled, Figure B is a partially sectional side view showing the lock lever in the locked state, and Figure 6 shows the sixth embodiment. Figure A is a perspective view of the IC socket shown in the unlocked state;
Figure B is a partial perspective view of the IC retainer cover illustrating the ball sliding state, Figure C is a sectional view of the IC retainer cover showing the state after the ball has slid in, and Figure 7 is a conventional IC retainer cover.
FIG. 3 is a side view showing a socket partially in section. 1...Socket base, 2...IC presser cover,
2a, 3a...Locking protrusions made of wear-resistant material;
3... Lock lever, 5... IC, 5a... IC contact element, 6... Contact.

Claims (1)

[Scope of claims for utility model registration] (1) IC that is closed to a socket base and holds the IC
It comprises a holding cover, and a lock cover which is rotatably attached to either the socket base or the IC holding cover and engages and disengages from the other to maintain and release the IC holding cover.
In the IC socket, the lock lever locking protrusion formed on the IC presser cover or the IC presser cover locking protrusion formed on the lock lever,
Made of a wear-resistant material with a smooth surface,
An IC socket, characterized in that the surface of the wear-resistant member is used as an engagement surface to achieve the engagement and disengagement by the rotation lock lever, and the locking protrusion is provided so as to freely rotate.
IC presser cover locking mechanism. (2) A locking mechanism for an IC presser cover in an IC socket according to claim 1, wherein the freely rotating locking protrusion comprises a shaft member. (3) A locking mechanism for an IC presser cover in an IC socket according to claim 1, wherein the freely rotating locking protrusion is comprised of a ball.