JPH07201427A - Socket for electronic part - Google Patents

Abstract

PURPOSE:To reduce the cost at the time of using an electronic part, which is provided with multiple contact pins. CONSTITUTION:A cover housing 12 and a base housing 14 are respectively divided into plural parts, and they are fitted in a driving frame 17 and a lever force receiving frame 19. The driving frame 17 is supported freely to be slid in parallel with the lever force receiving frame 19, and connected through a moving mechanism 23 for converting the turning operation of a handle 29 to the operation along the contact pin connecting/disconnecting direction. A mold die for forming the cover housing 12 and the base housing 14 has the structure at a low cost, which is provided with a small number of contact pins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component socket used for mounting an electronic component such as a multi-chip module (hereinafter referred to as a unit MCM) on a substrate.

[0002]

2. Description of the Related Art Conventionally, as a socket used for mounting electronic parts on a board, a ZIF (Zero Intertion F
There are those equipped with a mechanism. This mechanism is configured to move a moving member, which temporarily holds an electronic component, in parallel with a socket body along a substrate surface, and to insert a contact pin of the electronic component into a contact of the socket body. That is, when attaching or detaching the electronic component to or from the socket, frictional force does not act on the contact pin, so that the electronic component can be easily attached and detached. This type of socket will be described with reference to FIGS.

FIG. 8 is a perspective view showing a conventional socket for electronic parts disclosed in Japanese Utility Model Laid-Open No. 63-69496, FIG. 9 is a perspective view showing a driving lever, and FIG. 10 is an enlarged view of a part of the socket. In the cross-sectional view shown in FIG. 6, (a) shows a state where the socket is connected, and (b) shows a state where the socket is not connected.

In these drawings, 1 is an insulating housing as a socket body, and 2 is an insulating cover as a moving member. The socket body 1 has a built-in contactor into which a contact pin of an electronic component (not shown) is inserted, and is mounted on and supported by a substrate (not shown).
The insulating cover 2 is provided with a large number of guide holes 2a for holding the electronic parts by inserting the contact pins, and is attached to the socket body 1 so as to be movable in parallel along the substrate surface.

A lever indicated by reference numeral 3 in the drawing is interposed between the socket body 1 and the insulating cover 2.
The insulating cover 2 is configured to move in parallel with the socket body 1 by rotating the lever 3. The lever 3 is formed of a metal rod in an L shape, and one side of the L shape is inserted between the socket body 1 and the insulating cover 2, and the other side is attached to the outside of the socket.

The moving mechanism using the lever 3 is provided with an oval-shaped portion 4 by flattening a part of the lever 3 as shown in FIG.
As shown in FIG. 10, it is configured to fit into the concave groove 5 of the socket body 1 and the concave groove 6 of the insulating cover 2. That is, by rotating the oval-shaped portion 4 of the lever 3 clockwise from the position shown in FIG.
The inner surface of 6 is biased by the oval-shaped portion 4 so that the insulating cover 2 moves to the right side in the figure with respect to the socket body 1 as shown in FIG. Further, by rotating the oval-shaped portion 4 counterclockwise from the position shown in FIG.
Moves to the left with respect to the socket body 1 and returns to the initial position.

In the conventional socket having the ZIF mechanism, the insulating cover 2 is thus moved in parallel with the socket body 1 by one lever 3 and the contact of the electronic component inserted into the guide hole 2a of the insulating cover 2 is made. Pin the socket body 1
The structure was such that it could be inserted into or removed from the inner contactor.

[0008]

However, the conventional electronic component socket configured as described above has the following configuration when the number of contact pins of the electronic component to be used is extremely large (for example, 500 pins or more). Problem will occur.

That is, since the socket body 1 and the insulating cover 2 are integrally molded, the contact pin insertion holes (contactor accommodating holes) of the socket body 1 and the insulating cover 2 are formed in correspondence with the number of contact pins. Since more guide holes 2a have to be formed, the structure of the molding die for molding these becomes complicated, and it becomes expensive.

Further, since a large number of contact pins are engaged with the contacts of the socket body at a time, a large force is required to move the insulating cover 2 in parallel when the contact pins are engaged (with 500 terminals). About 30 kg). Therefore, the lever 3 configured by bending the metal rod into an L-shape and forming the oval-shaped portion 4 is deformed and the contact pin cannot be engaged.
This is because when the oval shaped portion 4 is rotated, a force can be applied only from one end side thereof. Moreover, the oval-shaped portion 4 is thinner than the other portions, and since force is applied to both the front and back surfaces in addition to this, this portion is easily fatigued.

The present invention has been made in order to solve such a problem, and it aims to reduce the cost when using an electronic component having a very large number of contact pins, and securely engages the contact pins with the contacts. The purpose is to be able to.

[0012]

According to a first aspect of the present invention, there is provided a socket for electronic parts, in which a moving member and a socket body are separately formed into a plurality of pieces and fitted into a frame body. Each socket main body is supported by a frame into which the socket main body is fitted so as to be movable in parallel, and is connected via a moving mechanism that changes the turning operation of the lever into an operation along the contact pin engagement / disengagement direction.

The socket for electronic parts according to the second invention is
In the electronic component socket according to the first aspect of the present invention, a moving mechanism for moving the moving member frame in parallel with the socket body frame is provided in a direction orthogonal to the contact pin engaging / disengaging direction and parallel to the substrate surface. A columnar body that is rotatably supported by the moving member frame body with the axial direction as an axial direction, an engaging notch formed in an axially different portion of the outer peripheral portion of the columnar body, and a notch for removing, Engagements formed in the socket body frame on the rear side and the front side in the contact pin engaging direction with respect to the columnar body, respectively, at positions corresponding to the engaging notch and the notch for removing. The reaction force wall, the removal reaction force wall, and the handles fixed to both ends of the columnar body, and the engagement and removal notches,
The cam is configured as a cam that engages with the engagement reaction force wall and the removal reaction force wall by the rotation of the columnar body and translates the moving member frame body in parallel along the contact pin engagement / disengagement direction.

[0014]

According to the first aspect of the invention, the molding die for molding each moving member and each socket body has a structure with a small number of contact pins. According to the second aspect of the invention, when the handle is swung, the force is applied to both ends of the cylindrical body to rotate the cylindrical body, and when the contact pin is engaged, the engagement notch engages with the engagement reaction force wall. , When the contact pin is removed, the notch for removal engages the reaction wall for removal. That is, a force is applied from the handle to the cylindrical body via two transmission paths passing through both ends thereof,
This columnar body exerts a force on axially different portions when the contact pin is engaged and when the contact pin is removed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 is a plan view of an electronic component socket according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a side view thereof. FIG. 1 (a) shows a state when a contact pin is engaged,
FIG. 2B shows a state when the contact pin is removed. Figure 4
Is a perspective view of the base housing and the cover housing, FIG.
6 is a perspective view showing a moving mechanism according to the present invention, FIG. 6 is a sectional view taken along the line VI-VI in FIG. 1, FIG. 6A shows a state when the contact pin is removed, and FIG. 6B shows a contact pin. The state at the time of entrance is shown. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 1, and FIG. 7A shows a state when the contact pin is removed,
FIG. 3B shows a state when the contact pin is engaged.

In these figures, 11 is a socket for electronic parts according to the present invention. This socket is configured to mount an MCM having an extremely large number of contact pins on a substrate (not shown). Reference numeral 12 designates a cover housing as an individual moving member formed in a divided manner. In this embodiment, 11 cover housings are arranged and mounted as shown in FIG. As shown in FIG. 4, the cover housing 12 is integrally molded of synthetic resin and has a large number of contact pin guide ports 13. In FIG. 4, a member indicated by the reference numeral 14 below the cover housing 12 is a base housing as an individual socket body formed in a divided manner.

The base housing 14 is formed such that its lateral width is the same as that of the cover housing 12, and a large number of contact receiving angular grooves 15 are formed in the cover housing 12 at positions corresponding to the contact pin guide ports 13. Has been done. Inside the contact-accommodating square grooves 15, MCM contacts 16 as contacts according to the present invention are loaded. The MCM contact 16 has a structure in which it is press-fitted and fixed in a through hole of a printed circuit board (not shown) and electrically connected to a circuit pattern. That is, the base housing 14 is the MCM.
The contact 16 fixes the printed circuit board.

The base housing 14 is superposed on the cover housing 12 with its upper part facing the recess 12a of the cover housing 12. The opening width of the recess 12a in the longitudinal direction is formed to be longer than the longitudinal dimension of the base housing 14 by a predetermined dimension. The predetermined size is a moving size in a moving mechanism described later.

The cover housing 12 and the base housing 14 are fitted into the frame body shown in FIG. 5, and the contact pin guide port 13 and the contact receiving angular groove 15 are positioned relative to each other. The eleven cover housings 12 are all fitted into and supported by the drive frame indicated by reference numeral 17 in FIG. The drive frame 17 constitutes the moving member frame body according to the present invention. The fitting portion between the cover housing 12 and the drive frame 17 is designated by reference numeral 18 in FIGS. 6 and 7.

On the other hand, the eleven base housings 14 are
It is fitted in the lever receiving frame indicated by reference numeral 19 in FIG. The lever force receiving frame 19 constitutes the socket body frame body according to the present invention. The lever force receiving frame 19 is screwed to a structure (not shown) with the printed circuit board sandwiched by a fixing screw (not shown) inserted into the fixing screw hole 20. That is, the base housing 14 is the MCM.
The contacts 16 are fixed to the printed circuit board by the contacts 16 and are fitted into the lever force receiving frame 19 so as to be supported thereby. A fitting portion between the base housing 14 and the lever force receiving frame 19 is indicated by reference numeral 21 in FIGS. 6 and 7.

The drive frame 17 is superposed on the lever receiving frame 19 so that the cover housing 12 is superposed on the base housing 14, and is slid along the board surface direction by the locking plate 22 (FIG. 1). It is freely connected.
The locking plate 22 is screwed to the lever force receiving frame 19. The direction in which the drive frame 17 can move is the vertical direction in FIG. That is, when the drive frame 17 is translated in parallel with the lever force receiving frame 19 in the vertical direction of FIG. 1, all the plurality of cover housings 12 are translated in parallel with the respective base housings 14 at the same time. .

The parallel movement is performed by a moving mechanism 23 provided on the drive frame 17 and the lever force receiving frame 19. The moving mechanism 23 includes a columnar body 24 rotatably attached to the drive frame 17, an engaging notch 25 and an ejecting notch 26 formed on an outer peripheral portion of the columnar body 24, and a lever force. It is formed by an engagement reaction force wall 27 and a withdrawal reaction force wall 28 formed on the receiving frame 19, and handles 29 fixed to both ends of the cylindrical body 24.

The cylindrical body 24 is set such that its axial direction is parallel to the substrate surface and is orthogonal to the moving direction of the drive frame 17, and both ends thereof are axially supported by the drive frame 17, respectively. The engagement notch 25 and the removal notch 26 are formed by partially flattening the outer peripheral portion of the columnar body 24, and the engagement notch 25 is formed at the central portion in the longitudinal direction of the columnar body 24. The notch 26 for removal is provided as the notch 2 for engagement.
5 are arranged on both sides. That is, both notches 25,
Numerals 26 are formed at different portions in the axial direction on the outer peripheral portion of the cylindrical body 24.

The engagement reaction force wall 27 and the removal reaction force wall 28
Are formed integrally with the lever force receiving frame 19 and are configured as convex walls projecting toward the drive frame 17 side, respectively. The engagement reaction force wall 27 is shown in FIG.
In the upper part of the columnar body 24, the removal reaction force wall 28 is located below the columnar body 24 and faces the removal notch 26. It is installed in. The engaging reaction force wall 27 is cut out at a portion corresponding to the fixing screw hole 20.

The engaging notch 25 and the removing notch 26 are brought into contact with the engaging reaction force wall 27 and the removing reaction force wall 28 by the rotation of the cylindrical body 24, and the drive frame 17 is driven. Is configured as a cam that moves up and down in parallel in FIG. That is, when the handle 29 is swung in the direction indicated by arrow A in FIG. 5, the drive frame 17 moves in parallel in the direction indicated by arrow C in FIG. This state is the contact pin engaged state. Then, when the handle 29 is swung in the opposite direction (direction of arrow B) from this state, the drive frame 17 is translated in the direction indicated by arrow D and returns to the original position.

In FIG. 1, reference numeral 30 indicates an MCM.
Guide guides for guiding 31 to the proper fitting position, 3
2 is MCM31 when this socket 11 is mounted vertically
It is a fall-prevention spring that prevents the fall-off.

Next, the operation of the socket 11 configured as described above will be described. In order to assemble this socket 11, first, the MCM contact 16 is press-fitted and fixed in the through hole of the printed circuit board for electrical connection, and then
The base housing 14 is attached, and further the cover housing 12 is attached and assembled. That is, the force receiving frame 19 is fitted in the base housing 14 and fixed to the printed circuit board side, and the cover housing 12 is placed on the base housing 14 and the drive frame 17 is fitted in the cover housing 12. Finally, the drive frame 17 is attached to the locking plate 2
It is connected to the lever force receiving frame 19 by 2.

In order to mount the MCM 31 on the printed circuit board via the socket 11, first, the handle 29 is moved to the position shown in FIG.
As shown in FIG. Then, as shown in FIG. 6A, the contact pin 3 of the MCM 31
3 is a contact pin guide port 13 of the cover housing 12
And the MCM 31 is temporarily held by the cover housing 12. In this state, the contact pin 33 is located outside the MCM contact 16 of the base housing 14 and both are not connected.

Next, the handle 29 is swung in the direction of arrow A in FIG. By doing so, the cylindrical body 24 in FIG. 6A rotates counterclockwise, and the flat surface of the engaging cutout 25 comes into contact with the engaging reaction force wall 27. Then, as the columnar body 24 continues to rotate, the engagement notch 25 and the engagement reaction force wall 27 compete with each other, and the drive frame 17, the cover housing 12, and the MCM 31 move to the left side in FIG. 6A. This movement is continued until the engagement notch 25 stops engaging with the engagement reaction force wall 27 as shown in FIG. When the engaging notch 25 is disengaged from the engaging reaction force wall 27 as shown in FIG. 6B, the contact pin 33 of the MCM 31 is engaged in the middle of the MCM contact 16 and is electrically connected thereto. Become.

That is, when the handle is operated, all the cover housings 12 move at the same time and all the contact pins 33 of the MCM 31 are engaged with the MCM contacts 16.

Further, as described above, the MCM 31 mounted on the printed circuit board via the socket 11 is removed by raising the handle 29 from the state shown in FIG. 6B as shown in FIG. At this time, the columnar body 24 shown in FIG. 7B rotates clockwise, and the notch 26 for extraction comes into contact with the reaction wall 28 for extraction, and the two compete with each other, whereby the drive frame 17 and the cover housing 12, The MCM 31 moves to the right in the figure. Then, when the handle 29 reaches the standing position, as shown in FIG.
No longer engages with the extraction / reaction force wall 28, and the movement stops. That is, the dimension S shown in FIG. 7B becomes smaller as shown as the dimension S in FIG. 7A after the movement is completed. As a result, the contact pin 33 of the MCM 31 is positioned outside the MCM contact 16,
The MCM 31 can be removed upward in the drawing.

Therefore, since a plurality of cover housings 12 and base housings 14 are formed and they are positioned by the drive frame 17 and the lever force receiving frame 19, the MCM 31 has a large number of contact pins 33. The mold for molding the cover housing 12 and the base housing 14 has a structure with a small number of contact pins.

When the handle 29 is swung, the force is applied to both ends of the cylindrical body 24 to rotate the cylindrical body 24,
The engagement notch 25 engages with the engagement reaction force wall 27 when the contact pin is engaged, and the removal notch 26 engages with the extraction reaction force wall 28 when the contact pin is removed. That is, a force is applied from the handle 29 to the cylindrical body 24 via two transmission paths passing through both ends thereof, and the cylindrical body 24 exerts a force on a portion axially different when the contact pin is engaged and when the contact pin is removed. I will join you.

[0034]

As described above, in the electronic component socket according to the first aspect of the present invention, the moving member and the socket body are separately formed into a plurality of pieces, which are fitted into the frame body. Since each socket main body is supported by the frame into which it can be moved in parallel, and is connected through a moving mechanism that changes the pivotal movement of the lever into an operation along the contact pin engaging / disengaging direction, each moving member and each socket main body are connected. The molding die to be molded has a structure with a small number of contact pins.

Therefore, the manufacturing cost of the molding die can be reduced, and the socket which can use the electronic parts having a large number of contact pins can be obtained at a low cost.

The electronic component socket according to the second invention is
In the electronic component socket according to the first aspect of the present invention, a moving mechanism for moving the moving member frame in parallel with the socket body frame is provided in a direction orthogonal to the contact pin engaging / disengaging direction and parallel to the substrate surface. A columnar body rotatably supported by the moving member frame body with the axial direction as an axial direction, an engaging notch formed in a different portion in the axial direction in the outer peripheral portion of the columnar body, and a notch for removal. Engagements formed in the socket body frame body on the rear side and the front side in the contact pin engaging direction with respect to the columnar body, respectively, at positions corresponding to the engaging notch and the notch for removing. Formed by a reaction force wall, a withdrawal reaction force wall, and a handle fixed to both ends of the cylindrical body, and the engaging and withdrawing notches,
The handle swings because it is configured as a cam that engages with the engagement reaction force wall and the removal reaction force wall by the rotation of the columnar body and translates the moving member frame body in parallel along the contact pin engagement / disengagement direction. And the force is applied to both ends of the cylinder to rotate the cylinder.When the contact pin is engaged, the engaging notch engages the engaging reaction force wall, and when the contact pin is removed, the removing notch is removed. Engage with the reaction wall. That is, a force is applied from the handle to the columnar body through two transmission paths passing through both ends thereof, and the columnar body is exerted on a portion axially different between when the contact pin is engaged and when the contact pin is removed.

Therefore, the force for rotating the columnar body is applied from two places, and the columnar body is surely rotated.
Further, since force is not applied to the same portion of the cylindrical body when the contact pin is engaged and removed, fatigue is less likely to occur. Therefore,
Even if an electronic component having a large number of contact pins is used, the contact pins can be reliably inserted into and removed from the contactors.

[Brief description of drawings]

FIG. 1 is a plan view of an electronic component socket according to the present invention.

FIG. 2 is a front view of an electronic component socket according to the present invention.

FIG. 3 is a side view of an electronic component socket according to the present invention,
The figure (a) shows the state when the contact pin is engaged, and the figure (b) shows the state when the contact pin is removed.

FIG. 4 is a perspective view of a base housing and a cover housing.

FIG. 5 is a perspective view showing a moving mechanism according to the present invention.

6 is a sectional view taken along the line VI-VI in FIG. 1, where FIG. 6A shows a state when the contact pin is removed, and FIG. 6B shows a state when the contact pin is engaged.

FIG. 7 is a sectional view taken along line VII-VII in FIG.
Shows the state when the contact pin is removed, and FIG. 7B shows the state when the contact pin is engaged.

FIG. 8 is a perspective view showing a conventional electronic component socket.

FIG. 9 is a perspective view showing a driving lever of a conventional socket.

FIG. 10 is a cross-sectional view showing a part of a conventional socket in an enlarged manner, and FIG. 10A shows a state in which the socket is connected,
The same figure (b) has shown the state where the socket is not connected.

[Explanation of symbols]

 11 Socket 12 Cover Housing 14 Base Housing 16 MCM Contact 17 Drive Frame 19 Lever Force Receiving Frame 23 Moving Mechanism 24 Cylindrical Body 25 Notch for Engagement 26 Notch for Detachment 27 Engagement Reaction Force Wall 28 Ejection Reaction Force Wall 29 Handle 31 MCM 33 Contact pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshi Kishimoto 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Shinichi Sasaki 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Mitsuhiko Kawauchi 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A moving member for holding an electronic component, which is penetrated by a large number of contact pins provided upright on the electronic component, is moved in parallel with a socket body fixed to the substrate along a substrate surface by a moving mechanism. In a socket for electronic parts in which the contact pin is engaged with and removed from the contactor of the socket body, the moving member and the socket body are divided into a plurality of parts along a direction parallel to the substrate surface to form a frame. The frame body into which the moving members are fitted is supported by the frame body into which the socket bodies are fitted so as to be movable in parallel along the engagement / disengagement direction of the contact pins, and the pivoting operation of the lever is performed by the contact pin engagements. An electronic component socket, characterized in that the electronic component socket is connected through a moving mechanism that changes the operation along the detaching direction. 2. The electronic component socket according to claim 1, wherein a moving mechanism for moving the moving member frame body in parallel with the socket body frame body is provided in a direction orthogonal to the contact pin engaging / disengaging direction and on the substrate surface. A columnar body that is rotatably supported by the moving member frame with the parallel direction as the axial direction, and a notch for engagement and a notch for removal formed at different portions in the axial direction on the outer peripheral portion of the columnar body. Notches and portions of the frame for the socket body that are the rear side and the front side in the contact pin engaging direction with respect to the columnar body, and are formed at positions corresponding to the engaging notch and the notch for removing, respectively. Formed by the engaging reaction force wall and the withdrawal reaction force wall and the handles fixed to both ends of the cylindrical body, and the cylindrical body rotates the engaging and withdrawing notches. Engagement reaction force wall, removal reaction force An electronic component socket, which is configured as a cam that is brought into contact with a wall to translate a moving member frame in parallel along a contact pin engaging / disengaging direction.