JPS6014473B2 - Plug holding mechanism in socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an IC that is openably and closably supported in an IC socket, for example.
This relates to the plug holding mechanism of the holding cover.

Conventionally, when mounting a flat IC package on an IC socket and making a connection, each lead of the IC package is simply pushed onto each contact of the IC socket. While maintaining the overlapping of the socket and IC package, each lead is pressed onto the contact to create a stable bullet saddle.

According to the present invention, a plug holder, which is a plug holder cover provided to maintain contact with a plug such as the above-mentioned IC package, is attached to an IC socket in an openable and closable manner without using a separate component such as a shaft pin. is characterized by a joint connection mechanism that prevents play in the direction of the rotation axis, lateral displacement, etc.

The drawings show an embodiment of the above-mentioned plug holding mechanism implemented for a socket of a flat type IC package.

The present invention will be described in detail below based on the same examples.・In the figure, 1 indicates an IC socket, and the IC socket 1 has a contact group 2a that contacts the lead group of the IC package.
A plug holding cover 3 and a locking lever 4 are attached to the contact holding base 2.
Equipped with.

The plug holding cover 3 is pivotally supported at one end of the base 2 by a joint 3' so that it can be rotated closed and rotated open, and when this is closed onto the base 2, a pad 3a protruding from the inner surface of the base 2 is attached to the base 2. The lock lever 4 has the function of pressing the leads of the IC package mounted on the base body 2 to the contacts 2a of the base body 2, and the lock lever 4 is rotatably attached to the other end of the base body 2 with a joint 4'. By fitting the cover 3 onto the cover 3, it has the function of pressing the cover 3 downward and locking it so that it cannot be opened or rotated.

The lock lever 4 has an engagement finger 4 that engages with the free end of the cover 3.
a and a finger hook part 4b constituted by the free end of the bar, and the engaging finger 4a is provided on the free top surface of the plug holding cover 3 on the other hand.
The contact 2 is formed with a groove 3b that engages with the contact 2 by snapping the protrusion 4c of the engaging finger 4a into the groove 3b while rotating the lock lever 4 to close the cover 3.
The plug holding cover 3, which is slightly floating due to the elastic force of the contact 2a, is forcibly held down from above against the elasticity of the contact 2a, and is in a locked state. The present invention is implemented in the plug holding cover 3 or the lock lever 4 which is supported so as to be openable and closable as described above. The embodiment relates to a presser cover that forms the plug presser, and shows a specific example of its joint mechanism.

As shown in the figure, the contact holding base 2 includes a bearing arm 2b integrally projecting from one end thereof.

Similarly, the plug holding cover 3 includes the bearing arm 2b and a shaft-erecting arm 3c integrally projecting from its base end to form a lotus stripe. A single bearing arm 2b and a single shaft erecting arm 3c constitute a pair of connecting joints, and at least one pair, preferably two pairs of these are arranged side by side at intervals as in the illustrated embodiment. The same effect can be achieved even if the bearing arm 2b is provided on the cover 3 and the shafting arm 3c is provided on the base body 2. A hole 2c is bored in the bearing arm 20 in the direction of the rotating axis of the holding cover 3, and a shaft 3d protrudes on one end surface of the shafting arm 3c in the direction of the turning axis of the holding cover 3. will be established.

Further, the bearing arm 2b is provided with a key groove 2d parallel to the rattle hole 2c and the shaft 3d on the side surface thereof along the koji hole 2c.

The key groove 2d is preferably formed on the bottom side of the base body 2, which is not an opening/closing area in normal use. Further, the ratchet 3d, the shaft hole 2c, and the key groove 2d are located on the distal end side of each of the shafts 3d that protrude from the end face of the shaft erecting arm 3c, and protrude from the base end of the base body 2, respectively. A parallel key 3e is provided.
When two pairs of rutting arms 3c and bearing arms 2b are provided, the koji 3d are coaxial and protrude in the same direction, and the keys 3e are arranged on the side of the tip surface of each shaft 3d. key 3
e is arranged at an interval that allows simultaneous sliding engagement with the keyway 2d of each European receiving arm 2b. That is, the plug holding cover 3 is laterally shifted from the normal opening/closing position, and the key 3e and the keyway 2d are fitted together in a position where the shaft 3d and the bearing arm 2b do not interfere with each other. A state is formed in which the key holes 2c are lined up on the same axis. Under the mating of the key 3e and the key book 2d, the plug holding cover 3 is moved to the normal opening/closing position using the mating as a guide. By moving the key 3e laterally, the shaft 3d is inserted into the hole 2c, and the key 3e is removed from one end of the keyway 2d.

At this detached position, one end surface of the shafting arm 3c is connected to the bearing arm 2b.
comes into surface contact with the corresponding end surface. By turning the plug holding cover 3 toward the upper surface of the base 2 from the detached position of the key 3e, the key 3e can be moved to the bearing arm 2.
It becomes a grandchild state with the other end surface of b.

As a result, the bearing arm 2b is interposed between the key 3e and one end surface of the shafting arm 3c, and the engagement of the key 3e prevents lateral movement in the opposite direction to the lateral movement. become. Therefore, in the normal opening and closing position of the presser cover 3, substantial connection between the arms 2b and 3c is achieved, and a state can be created in which normal insertion of the shaft 3d and the inguinal hole 2c and rotation at a fixed fulcrum are guaranteed. Further, the joint connection between the plug holding cover 3 and the base body 2 can be released by performing the operation opposite to the above. keyway 2
If the position d is provided on the bottom side of the base, in a mounting mode such as mounting the socket on a printed circuit board or the like, the cover 3 will not be opened and rotated toward the bottom surface, and there will be no fear of natural release of the joint connection. The present invention can be very suitably implemented as an opening/closing mechanism for a plug holder of a flat IC package in an IC socket or the like mounted in the above-mentioned usage pattern, and can be made to function effectively as a plug holder.

The plug holding cover 3 and the contact holding base 2 are connected together without any force being applied to the joint.
It can be combined very smoothly and easily with one-touch operation.
IC sockets, etc. are made of relatively thick, hard resin molded products that do not undergo thermal deformation during mounting tests under high temperatures, and therefore have poor elasticity, but the above allows the plug retainer cover to be installed without problems without using elasticity. It is possible. The example is base 2
and its bearing joint 2b, and a cover 3 which is a plug holding body.
A case is shown in which the arm 3c for erecting the shaft and the shaft 3d are each constructed as an integrally molded product, and the present invention eliminates the need to insert and connect a piston (shaft) constructed as a separate part when forming an opening/closing joint. Therefore, joint connection using such an integrally molded product is possible. According to the above, the connection of the plug holding cover and the fixed fulcrum rotation state (lateral slip prevention state) for securing the plug holding position can be achieved by an extremely simple operation by coupling the key 3e and the keyway 2d.

The IC package is mounted on a socket attached to a printed circuit board and subjected to various measurement tests, but when checking for defective products by placing it in a high-temperature oven under electricity for a certain period of time, the IC package is held in place with an IC holding cover. Although it is necessary to
In a measurement test in which the operating performance is checked using an automatic measuring machine, a predetermined measurement is sometimes performed while holding the IC package with a holder provided in the measuring machine, and in this case, an IC holding cover is not necessary. For example, the holding cover 3 can be attached and detached from the socket body with a one-touch operation, and removal and attachment can be done flexibly on site depending on the type of measurement test, and the same socket body can be shared, which is economical. In addition, when a rotary joint is formed by inserting a separate part, the alignment error of the inserted part is amplified, but in the present invention, the shaft 3d can be integrally molded, and both the shaft 3d and the shaft hole 2c can be formed by molding. It can be manufactured with high precision, and the presser cover 3 and the like can be connected, opened and closed without play, and can be suitably put to practical use as an IC presser that requires precision. It also has the advantage that insulation can be maintained at a higher level than when using metal pins or the like.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of an IC socket, FIG. 2 is a side view of the IC socket partially cut away, and FIG. 3 is a plan view showing the joint part of the plug holding cover separated. , 4th
5 is a perspective view of the same, and FIGS. 5A, 5B, and 5C are partially sectional front views of the bearing arm portion for explaining the connection process of the joint in sequence. 1...Socket, 2...Contact holding base,
2b... Bearing arm, 2c... Ball hole, 2d...
...Keyway, 3...Plug holding cover, 3c...Arm for shaft stand, 3d...Shaft, 3e...
...Key, 4...Lock/1. Figure 1 Figure 2 Figure 5 Figure 3 Figure 4

Claims (1)

[Claims] 1. A socket consisting of a contact-holding base that connects to a plug of an IC package or the like as a socket body, and a plug holding cover connected to the end of the contact-holding base by a rotary shaft so as to be openable and closable. has a bearing arm integrally protruding from one end thereof, and the plug retainer cover has an arm for shaft erecting integrally protruding from its base end, and the bearing arm has a rotation axis of the retainer cover. A shaft hole is drilled in the direction, and the shaft erecting arm has a shaft protruding from one end surface thereof in the direction of the rotation axis of the plug holding cover, and the bearing arm further has a shaft formed on its outer surface along the shaft hole. A key groove is provided, and a key is protruded from the base end of the contact holding base and is positioned on the side of the distal end surface of the shaft and slides into the key groove, and when the key and the key groove slide together, the shaft The holes are lined up on the same axis, and the shaft is inserted into the shaft hole and the key is removed from the keyway by lateral movement of the plug holding cover guided by the sliding engagement between the key and the keyway. In addition, the bearing arm is interposed between the key and the end face of the shafting arm when the plug holding cover is reversed in the detached position of the key, and the lateral movement is reversed. A plug holding mechanism characterized in that it is configured to prevent lateral movement in the direction.