JP3202587B2 - Sub board insertion / extraction structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure suitable for use in an ATM (Asynchronous Transfer Mode) switching system or the like which handles ultra-high-speed signals. The present invention relates to a sub-board insertion / extraction structure between a back board and a sub-board in a combined mounting structure of a planar mounting and a bookshelf mounting configured in combination. More specifically, the present invention provides
ZIF (Zero Inserti), a board-to-board connector using a sub-board insertion / extraction mechanism using parallel links and an insertion / extraction slider
onForce: Zero insertion force) The present invention relates to an insertion / extraction structure that enables batch operation of a mechanism.

[0002]

2. Description of the Related Art As a conventional mounting structure of a combined flat-mounting / bookshelf-mounting type in which a flat-mounting section is combined with a bookshelf-mounting section, the present applicant has disclosed in Japanese Patent Laid-Open No.
Japanese Patent Application No. 02456 (Japanese Patent Application No. 5-351725) proposes a sub board insertion / extraction structure as shown in a schematic perspective view in FIG. FIG. 15 is an enlarged partial perspective view of FIG. 14 from the rear side.

Referring to FIGS. 14 and 15, in this conventional mounting structure, a sub board insertion / extraction structure between a back board 1 and a sub board 2 having a mounting structure combining plane mounting and bookshelf mounting is referred to as a back board. The L-shaped member 6 of the parallel link 4 fixed to the unit frame 3 through 1 is provided with a rotatable projection (not shown in the figure, which is provided at a position hidden on the lower side of the figure), An L-shaped groove 8 with which the rotation protrusion can be engaged is provided at a position facing the rotation protrusion of the sub-board reinforcing frame 7, and a lever force applying member 9 is provided on the parallel link 4.

[0004] When the sub-board reinforcing frame 7 is connected to the parallel link 4, the entrance of the L-shaped groove 8 invites the rotation projection,
When the lever force applying member 9 is turned in a predetermined direction by a jig (not shown), the rotation protrusion rolls on the horizontal portion of the L-shaped groove 8, and the sub board 2 moves in parallel and is mounted on the back board 1. The structure is such that the board-to-board connector 11 is fitted.

Further, the conventional sub-board insertion / extraction mechanism is L
At the position where the entrance of the U-shaped groove 8 induces the rotation protrusion and the rotation protrusion advances to the horizontal portion of the L-shaped groove 8 and stops,
The handle 10 has a mechanism (not shown) for locking the sub-board 2 to the parallel link 4. This locking mechanism has a function of holding the sub-board 2 in the insertion / extraction structure when the sub-board 2 is mounted on the parallel link, and preventing the sub-board 2 from falling off.

[0006]

SUMMARY OF THE INVENTION The conventional planar mounting
If a general ATM switch rotating unit is to be constructed using a sub-board insertion / removal structure of a bookshelf mounting composite type, the signal speed of the ATM switch is set to a very high speed of, for example, 156 to 311 Mbps, and the rising edge of a pulse is increased. Since the time is shortened, the ratio of the number of signal assignments of the connector contacts to the number of earth assignments is set to approximately 1: 1, and the characteristic impedance of the contacts is matched to the characteristic impedance of the transmission line (for example, a printed pattern cable or the like). It is necessary to reduce the waveform distortion of the signal and to reduce the crosstalk in the connector by surrounding the signal contact with the ground.

For this reason, the number of connector terminals required as an ATM switch circuit package is, for example, 1,000 to 5,
000 terminals.

However, in the above-described conventional sub-board insertion / extraction structure, the insertion force per contact of the inter-board connector 11 is set to 40 g, and the warp of the sub-board is small, and the sub-board reinforcing frame 7 can realize stable inter-board connection. Assuming that the allowable load of the sub board 2 is 100 kg, the number of connector terminals of the sub board 2 cannot be more than 2,500.

For this reason, the conventional sub board insertion / extraction structure is
A large-scale ATM in which the number of terminals on the sub-board increases to a level of, for example, 3,000 to 5,000 terminals.
It has been difficult to apply it to switching systems.

When the allowable load of the sub-board reinforcing frame 7 is small, a ZIF (Zer
o There is a method of applying an insertion force (zero insertion force) mechanism, but the operation of the connector ZIF mechanism and the operation of the sub-board insertion / extraction mechanism are required, resulting in a two-step operation. That is, this two-step operation is an operation in which, when the sub-board 2 is inserted, the connector ZIF mechanism (not shown) is confirmed to be inoperative, and then the lever force applying member 9 is turned by attaching a jig (not shown). And, when removing the sub-board, operating a ZIF mechanism (not shown), and then attaching a jig (not shown) to the lever force applying member 9 and turning in the opposite direction.
There is also a problem that the operation involves complicated procedures.

Furthermore, a handle 1 used when attaching or detaching the sub-board reinforcing frame 7 to or from the parallel link 4.
0 is a tied-up type structure, and it is necessary to secure a sufficient space around the handle 10 and arrange it so that it can be easily put in. Therefore, the space where the LSI and the circuit unit cannot be mounted increases. However, there is also a problem that the mounting density of the sub-board is reduced.

Accordingly, the present invention has been made in view of the above-mentioned problems of the prior art, and has been constructed by combining a bookshelf mounting unit with a plane mounting unit when mounting a large-scale ATM switching system. Plane mounting / bookshelf mounting The sub-board insertion / extraction mechanism using a parallel link between the back board and the sub-board of the composite mounting structure is linked to the ZIF mechanism of the board-to-board connection connector using the insertion / extraction slider, and the sub-board and the connector are operated collectively. It is an object of the present invention to provide a sub board insertion / extraction structure that enables the above.

[0013]

In order to achieve the above object, the present invention provides a backboard disposed on the back side of a bookshelf mounting constituted by mounting an electronic circuit package in a bookshelf shape, and the backboard. And a sub-board arranged on the back side of the back board, and an inter-board connector is provided between the back board and the sub-board, and the back board is connected to the back board via the inter-board connector. In the electronic device mounting structure to which the subboard is connected, a backboard-side fixing member and a subboard holding member are provided on the back surface of the backboard, and the backboard-side fixing member and the subboard holding member are provided. A parallel link formed by connecting a flat plate link and a three-point support type link to a member, and a rotatable link rotation is provided on one support portion of the three-point support type link. A pivot groove is provided opposite to the link pivot projection, the pivot groove engaging with the link pivot projection is provided, and the cam shaft is rotatable on the backboard surface via bearing means. The camshaft has an insertion notch for moving the insertion / extraction slider in one direction in the contact direction of the board-to-board connector, and the camshaft has an L-shaped handle in the non-contact direction of the board-to-board connector. A removal notch portion for moving the insertion / extraction slider in a direction opposite to the one direction, wherein the insertion / extraction slider is disposed on the back of the backboard, and a plurality of insertion / extraction sliders are connected by an insertion / extraction slider connecting member. A sub board insertion / extraction structure is provided.

Further, in the subboard insertion / extraction structure according to the present invention, a cut-groove-shaped heart-shaped cam is provided in a reinforcing frame of the subboard, and a locking rod connected by a pin joint is inserted into a groove of the cam. A handle for holding the locking rod in a reinforcing frame of the sub-board in a state where a biasing force of a predetermined elastic member is applied, and further connecting the kerf-shaped heart-shaped cam to a sub-board detachable handle; The elastic member is pressed by the pull-out movement of the sub-board detachable handle locked to the handle connecting shaft, the locking rod is stored in the reinforcing frame of the sub-board, and the sub-board is held. A sub-board mounting / dismounting structure is provided in which a tip end of the locking rod engaged with a locking groove provided in the member is released.

[0015]

According to the present invention, even in a large-scale ATM switching system which requires connection of a large number of terminals, the ZIF mechanism of the connector connected by parallel movement of the parallel link and the board-to-board connector is used. It is possible to arrange and use connector terminals (contacts) by dividing into connectors. Moreover, when operating these connectors, the connectors can be connected sequentially without the connector insertion / extraction forces overlapping, so that the operation force for inserting / extracting the sub-board is small, and the connector insertion / extraction force acting on the sub-board. Are not applied at the same time, a sub-board reinforcement frame structure with a small allowable load can be used, and the sub-board reinforcement frame can be reduced in weight and simplified.

Further, according to the present invention, a sub-board insertion / extraction mechanism using a parallel link between a back board and a sub-board, and a ZIF of an inter-board connector using an insertion / extraction slider.
The mechanism can be linked, and the operation of inserting and removing the sub-board and the operation of inserting and removing the connector can be performed collectively by operating only the handle.

Further, according to the present invention, since the T-shaped handle for attaching and detaching the sub-board is detachable by the handle connecting shaft portion, after the sub-board is attached to the sub-board insertion / extraction structure, the T-handle for attaching and detaching the sub-board can be removed. The handle can be removed. For this reason, the space in which the LSI or the circuit unit cannot be mounted, which is generated for securing the operation space of the handle, can be minimized. When the sub-board is detached, it is possible to release the lock between the sub-board insertion / extraction mechanism and the sub-board reinforcing frame only by pulling out the T-handle. It is possible to lock the sub-board reinforcing frame to the sub-board insertion / extraction mechanism simply by grasping and fitting, thereby simplifying the maintenance work of the sub-board.

[0018]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 show a sub board insertion / extraction structure according to an embodiment of the present invention. FIGS. 1 (A) and 1 (B) are a front view and a front view showing a sub board insertion / extraction structure according to an embodiment of the present invention. It is a top view.

FIG. 2 shows the transition of the fitting operation of the sub-board assembly and the state of the insertion projection of the insertion / extraction slider and the insertion notch of the cam shaft when the sub-board insertion / extraction mechanism of FIG. 1 is viewed from above. It is a schematic partial top view. 2A shows a state in which the sub-board assembly is mounted and mounted, FIG. 2B shows a state in which the sub-board assembly has completed the horizontal movement, and FIG. 2C shows a state in which the insertion / removal slider of the inter-board connector has completed the rightward movement. FIG. 2 (D) to 2 (F)
Corresponding to the position of the L-shaped handle 19 (ie, FIG. 2A)
(Corresponding to FIG. 2 (C)) schematically showing a connection relationship between the insertion / extraction slider and the camshaft. FIG. 2 shows the sub-board insertion / extraction mechanism in which the heat radiation fin group is disposed below the sub-board holding member 14 and the power supply unit is mounted at a predetermined distance from both ends of the heat radiation fin group. .

Referring to FIG. 1, the sub board insertion / extraction structure according to the present embodiment includes a back board side fixing member 13 and a sub board holding member 14 on the back surface of the back board 1. A flat plate link 15 and a triangular link (three-fulcrum link) 16 between the board holding members 14
To form a parallel link, and a rotatable link turning projection 18 (see FIG. 2) is provided as a fulcrum at the apex of the triangular link 16, and the handle L-shape is opposed to the link turning projection. An L-shaped handle 19 provided with a rotation groove 20 (see FIG. 2) is rotatably mounted around a camshaft 23 as a rotation axis. As will be described in detail later, the cam shaft 23 has an insertion notch 27 for horizontally moving the insertion / extraction slider 26 in the contact direction of the board-to-board connector.
And a removal notch 28 for horizontally moving the board-to-board connector in a non-contact direction.
The surface is fixed via a rotary bearing 24 of the camshaft. Further, the insertion / extraction slider 26 of the inter-board connector is arranged on the back of the backboard 1, and the plurality of insertion / extraction sliders 26 are connected to each other by an insertion / extraction slider connecting member 29.

In FIG. 1B, the detachable link 12 shows the entire parallel link mechanism structure for moving the sub-board 2 in parallel with the backboard 1, and this detachable link 12 is mounted on a unit frame (not shown). The boards 1 are sandwiched, overlapped and fixed to the unit frame.

As shown in FIG. 2A, the attachment / detachment link 12 has a backboard-side fixing member 13 and a sub-board holding member 14, and the backboard-side fixing member 13 and the sub-board holding member 14 are flat plates. Link 15 and a triangular link 16, and the backboard-side fixing member 1
3 and the sub board holding member 14, a through pin 17 (FIG. 1)
(Refer to (A)) to limit the movement in the horizontal direction in the figure.

A rotatable link turning projection 18 is provided as a fulcrum at the apex of the triangular link 16, and the L-shaped handle 1 at a position opposed to the link turning projection 18.
9 is provided with an L-shaped handle groove 20 in the body.

FIG. 2A is a plan view showing a state in which the sub-board attaching / detaching structure is detached in one embodiment of the present invention. The state has been moved to the end of the L-shaped groove.

From this state, L is moved in the direction of the arrow in FIG.
When the handle 19 is rotated, the link rotation projection 18 of the triangular link 16 rolls on the handle L-shaped rotation groove 20 to reach the state shown in FIG. It moves to the mouth (open end) of the U-shaped rotation groove 20,
Backboard-side fixing member 13 and sub-board holding member 14
Touches a state where there is almost no gap.

From this state, the L-shaped handle 19 is further moved.
Is rotated, the link rotation projection 18 of the triangular link 16 is rotated.
Is released from the handle L-shaped rotating groove 20, the L-shaped handle 19 is allowed to move without being restricted by the triangular link 16, and finally can be rotated to the state shown in FIG.

Therefore, when a force is applied to the tip of the L-shaped handle 19 to operate the sub-board, the link rotation projection 18 rolls in the handle L-shaped rotation groove 20 and the horizontal movement pin 22 The triangular link 16 slides while rotating around the rotation fulcrum 21 of the triangular link 16, so that the lever operation determined by the positional relationship between the rotation fulcrum 21, the horizontal movement pin 22, and the link rotation projection 18 is performed by an L-shaped handle. It is possible to interlock with the lever motion determined by the rotation shaft 19, the handle L-shaped rotation groove 20, and the application position of the operation force, and the detachable link 12 can be moved in parallel with a small operation force.

On the other hand, as shown in FIG. 1, a camshaft 23 is rotatably fixed to the center of rotation of the L-shaped handle 19 by a rotary bearing 24, and an inter-board connector 25 contacts the camshaft 23. Insertion / extraction slider 26
An insertion notch 27 for horizontally moving the board and a removal notch 28 for horizontally moving the board-to-board connector 25 in a non-contacting direction are provided.

The insertion / extraction slider 26 (shown by hatching) in FIG. 1 (A) shows an example of a configuration in which inter-board connectors are arranged in six stages, and 12 insertion / extraction sliders 2 are provided.
6 is arranged on the back board 1 in a plane, so that the board-to-board connector can be inserted and removed only by rotating the L-shaped handle 19.

These insertion / extraction sliders 26 are shown in FIG.
As shown in the figure, the camshaft 2 is integrally fixed to the insertion / extraction slider connection member 29 by screwing, and when the inter-board connector is inserted into the insertion / extraction slider connection member 29, the camshaft 2
3 and the camshaft 2 when the board-to-board connector is pulled out.
3 is provided on the insertion / extraction slider connecting member 29 at an appropriate angle and position to abut on the extraction notch 28, and the L-shaped handle 19 is rotated until the state shown in FIG. Although the insertion / extraction slider 26 does not move horizontally (the insertion notch 27 of the camshaft 23 does not abut on one end surface of the insertion projection 30), the insertion projection of the insertion / extraction slider connecting member 29 in the state of FIG. When the L-shaped handle 19 is rotated to the state shown in FIG. 2 (C) while the L-shaped handle 19 reaches the position just before the insertion notch 27 of the camshaft 23, as shown in FIG. 2 (E) to FIG. Since the insertion notch 27 of the abutment 23 comes into contact with the insertion projection 30 of the insertion / extraction slider connecting member 29, the insertion / extraction slider 26 moves rightward in the drawing, and the inter-board connector is connected.

FIGS. 3 to 5 show the process of connecting the sub-board 2 and the inter-board connector 11 described above to the L-shaped handle 19, the camshaft 23, the sub board 2, the inter-board connector 11 and the insertion / extraction slider 26. Are schematically shown in combination with partial cross-sectional views to show the positional relationship. 3 to 5 show the back board 1 and the sub-board 2 in their entire cross-sections, from the left side of the area divided by the two-dot chain line, the side cross-section of the insertion / extraction groove portion of the insertion / extraction slider 26, FIG. 4 is a side sectional view in which a side cross section of the board-to-board connector 11, a side cross section of the insertion / extraction groove of the insertion / extraction slider 26, a side cross section of the triangular link 16 and a side cross section of the insertion notch 27 of the cam shaft 23 are combined into one drawing. .

In FIG. 3, the L-shaped handle 19 is in the vertical position, and the insertion notch 27 of the camshaft 23 does not abut on the insertion protrusion 30 of the insertion / extraction slider connecting member 29.

The sub-board side connector 31 and the back board side connector 32 which are components of the inter-board connector 11 assembled on the sub-board 2 are in an unfit state.

Further, since the projection 34 of the backboard connector 32 is provided at the end of the insertion groove 33 of the insertion slider 26, the subboard 2 and the backboard 1 are not connected.

When the L-shaped handle 19 is rotated, the state shown in FIG. 4 is obtained.
The sub-board connector 31 and the back board connector 32 are fitted with each other so that the gap between the sub-board holding member 14 and the sub-board holding member 14 is substantially zero. Since the insertion protrusion 30 has not yet contacted, the insertion / extraction slider 26 has not moved in the horizontal direction.

When the L-shaped handle 19 is further rotated to the state shown in FIG. 5, the link turning projection 18 completes the detachment from the handle L-shaped turning groove 20, and the turning force of the triangular link 16 is not applied. Is the insertion notch 2 of the camshaft 23
7 comes into contact with the insertion protrusion 30 of the insertion / extraction slider connecting member 29, and the insertion / extraction slider 26 is moved rightward in the figure, and the movable housing 35 of the backboard connector 32 is moved downward in the figure. The board-to-board connector 11 is connected using the movement of the movable housing 35.

FIG. 6 to FIG. 8 show a return path in the process of connecting the above-mentioned sub-board and the board-to-board connector, and show the sub-board 2 and the board-to-board connector 11.
Indicates that the sub-board is disconnected and the sub-board is in a detachable state. 6 to 8, like FIGS. 3 to 5, also show partial cross-sectional views in combination, and show a cross section of the camshaft 23 by a cross section of the extraction notch 28.

Here, FIG. 6 shows a state in which the L-shaped handle 19 can be rotated with a predetermined play from the state of FIG. 5, but is substantially similar to FIG.

With the rotation of the L-shaped handle 19, the removal notch 28 of the camshaft 23 comes into contact with the removal convex portion 36 of the insertion and removal slider connecting member 29, and the insertion and removal slider 26 is moved to the left in FIG. To the state.

Prior to the process shown in FIG. 7, the link turning projection 18 is formed without any trouble by the chamfer formed at the corner of the handle L-shaped turning groove 20 of the L-shaped handle 19 without any trouble.
It is guided by the character-shaped rotation groove 20.

When the L-shaped handle 19 is further rotated in the reverse direction, the link rotation projection 18 rolls on the handle L-shaped rotation groove 20 to be in the state shown in FIG. The connection connector 11 is disconnected, and the sub-board 2 becomes detachable in the process of FIGS.

On the other hand, with reference to FIGS. 9 to 11, in one embodiment of the present invention, preferably, the sub-board 2 is mounted on the sub-board reinforcing frame 37, and is attached to and detached from the side of the sub-board reinforcing frame 37. A detachable interlocking member 4
A kerf-shaped heart-shaped cam 38 is provided at one end of 3, and the kerf-shaped heart-shaped cam 38 is formed in a U-shaped portion. Further, a handle connecting shaft 44 is provided at the other end of the detachable interlocking member 43.

The locking rod 40 is inserted into the U-shaped groove 39 (see FIG. 10) from outside the sub-board reinforcing frame 37 while compressing the coil spring 41 (see FIG. 11).
Is slidably engaged in the kerf-shaped heart-shaped cam 38 via a pin joint 42.

As shown in FIG. 10, an L-shaped vertical groove 45 is formed in the handle connecting shaft 44 of the detachable interlocking member 43, and the T-shaped handle 46 for attaching and detaching the sub-board is opposed to the L-shaped vertical groove 45. Since the pin 47 is press-fitted into the inner cylindrical portion, the pin 47 of the T-shaped handle 46 for detaching and attaching the sub-board is positioned and pushed into the L-shaped vertical groove 45 of the handle connecting shaft 44, and the T-shaped handle 46 for detaching and attaching the sub-board. Is rotated, the pin 47 is locked with the horizontal groove of the L-shaped vertical groove 45, and the T-shaped handle 46 for detaching / attaching the sub board is not pulled out unless it is rotated in the reverse direction.

FIG. 11B shows a state in which the sub-board detachable T-shaped handle 46 is locked to the handle connecting shaft 44. In this state, the sub-board detachable T
When the handle 46 is lifted upward in the figure, the pin 47 in the kerf-shaped heart-shaped cam 36 slides along the kerf of the heart-shaped cam, thereby compressing the coil spring 41 and moving the locking rod 40 to the sub-board. It is stored inside the reinforcing frame 37.

By this storing operation, the sub board holding member 14
The distal end of the locking rod 40 engaged with the locking groove 48 is released, and the sub-board 2 becomes detachable from the sub-board holding member 14.

On the other hand, when the sub-board 2 is mounted on the sub-board holding member 14, the T-shaped handle 46 for detaching and mounting the sub-board is grasped, and the guide portion 49 of the sub-board holding member 14 and the notch 50 of the sub-board reinforcing frame 37. (See FIG. 9A)
Is pushed into the locking groove 40 by the restoring force of the coil spring 41, and the end of the locking rod 40 is fitted into the locking groove 48.
The sub-board reinforcing frame 37 is locked to the sub-board holding member 14. Thereafter, the T-shaped handle 46 can be removed by rotating the T-shaped handle 46 for attaching and detaching the sub-board in a predetermined direction.

The sub-board insertion / removal structure and the sub-board attachment / detachment structure according to the above-described embodiment of the present invention are combined with the unit frame 51.
FIG. FIG. 12A is a plan view, and FIG. 12B is a front view.

FIG. 13 shows the unit frame 51 of FIG.
FIG. 2 is a cross-sectional view and a partial structural view showing a structure when the MCM (multi-chip module) 52 is mounted on the sub board 2, and the L-shaped handle 19 is located at a position where the heat dissipation of the MCM 52 is not hindered. Stored, unit frame 5
1 can be compactly stored inside the mounting frame 53 for mounting the same.

FIG. 2 showing the operation of the L-shaped handle 19
2A and 2B, a reaction force corresponding to the insertion force of the inter-board connector 11 acts on the entire surface of the sub-board 2. In the process of FIGS. The sub-board 2 is attached to the sub-board reinforcing frame 37, and the deformation of the sub-board 2 can be at a level that can ensure a stable connector connection.

Further, the sub-board reinforcing frame 37 is locked to the sub-board holding member 14 at four points, and
With the operation of pulling out the character-shaped handle 46, the sub-board holding member 14 and the locking rod 40 of the sub-board reinforcing frame 37
Can release the lock at the point.

The board-to-board connector 25 after the sub-board reinforcing frame 37 is locked to the sub-board holding member 14.
The connection and disconnection operations need only be performed by rotating the L-shaped handle 19, and the parallel movement of the sub-board 2 and the insertion / extraction operation of the inter-board connector 11 by the insertion / extraction slider 26 are continuous operations that do not interfere with each other. Since the insertion / extraction force of the inter-board connection connector 25 does not concentrate at one time, a sub-board reinforcing frame having a simple structure may be used.

The contacts of the board-to-board connector 11 connected by the operation of the detachable link 12 and the insertion / removal slider 2
6, the number of terminals formed on the sub-board 2 can be significantly increased.

It should be noted that the present invention is not limited to the above embodiment, but includes various forms and modifications in accordance with the principle of the present invention.

That is, the present invention is not limited to the above-described sub-board insertion / extraction structure, but can be applied by appropriately modifying the structure of an MCM (multi-chip module) or an electronic circuit package. Various modifications are also conceivable.

Further, in the above-described embodiment, the case where the present invention is applied to an electronic device such as an ATM exchange has been described. However, the present invention is not limited to this, and it is possible to mount an MCM (multi-chip module) or an electronic circuit package. The sub-board insertion / removal structure constituted by the above is suitably applicable and exerts its effects.

[0057]

As described above, in the sub board insertion / extraction structure according to the present invention, a parallel link is formed by connecting the back board side fixing member and the sub board holding member with the flat plate link and the triangular link. When the L-shaped handle is rotated, the link rotation protrusion rolls on the L-shaped rotation groove provided on the handle, and the sub-board moves in the direction of the backboard in parallel. During the rotation, the interval between the back board side link member and the sub board side link member comes in contact with no gap, and furthermore, by rotating the L-shaped handle, the board connection connector can be connected, so that Have various excellent effects.

According to the present invention, even in a large-scale ATM switching system capable of connecting a large number of terminals, the connector connected by the parallel movement of the parallel link and the connector connected by the ZIF mechanism of the board-to-board connector. Since the connector terminals can be arranged and the connector insertion / extraction force does not overlap, the sub board insertion / extraction operation force can be reduced, and a sub board reinforcement frame structure with a small allowable load can be used. , And can be applied to a large-scale ATM switching system.

Further, according to the present invention, a sub-board insertion / extraction mechanism using a parallel link between the back board and the sub-board, and a ZIF of an inter-board connector using an insertion / extraction slider.
Since the mechanism is interlocked with the mechanism, the sub board insertion / extraction operation and the connector insertion / extraction operation can be collectively operated only by operating the L-shaped handle.

Further, according to the present invention, after the sub-board detachable T-shaped handle is mounted on the sub-board insertion / extraction structure, the T-shaped handle is removed.
Since the character handle can be removed, a space in which an LSI or a circuit unit cannot be mounted, which is generated to secure a space for operating the handle, can be minimized.

When the sub-board is attached or detached, the locking of the sub-board insertion / extraction mechanism can be released only by pulling out the T-shaped handle, and when the sub-board is mounted, the sub-board can be reinforced by simply grasping and fitting the T-shaped handle. Since the frame can be locked to the sub board insertion / extraction mechanism, the maintenance work of the sub board is simple.

[Brief description of the drawings]

FIG. 1 shows a configuration of a sub-board insertion / extraction structure according to an embodiment of the present invention, where (A) is a front view and (B) is a plan view.

FIG. 2 shows the transition of the fitting operation of the sub-board assembly and the state of the insertion projection of the insertion / extraction slider and the insertion notch of the cam shaft when the sub-board insertion / extraction structure according to the embodiment of the present invention is viewed from above. FIG. (A) and (D) show the sub-board assembly mounted state, (B) and (E) show that the sub-board assembly has completed horizontal movement, and (C) and (F) show the insertion / removal slider of the inter-board connector to the right. The state in which the movement has been completed is shown.

FIG. 3 is a schematic partial cross-sectional view of a parallel link mechanism and an insertion / extraction slider moving mechanism when the sub-board is mounted in the sub-board insertion / extraction structure according to the embodiment of the present invention.

FIG. 4 is a schematic partial cross-sectional view of the parallel link mechanism and the insertion / extraction slider moving mechanism when sub-board fitting is completed in the sub-board insertion / extraction structure according to one embodiment of the present invention.

FIG. 5 is a schematic partial cross-sectional view showing the completion of the operation of the insertion / extraction slider moving mechanism in the sub-board insertion / extraction structure according to the embodiment of the present invention.

FIG. 6 is a schematic partial cross-sectional view showing a state of a parallel link mechanism and a withdrawal protrusion of an insertion / extraction slider before insertion / extraction of a subboard in a subboard insertion / extraction structure according to an embodiment of the present invention.

FIG. 7 is a schematic partial cross-sectional view showing the state of the extraction protrusion of the insertion / extraction slider when the insertion / extraction slider completes the connector extraction / extraction movement in the sub-board insertion / extraction structure according to the embodiment of the present invention.

FIG. 8 is a schematic partial cross-sectional view of the parallel link mechanism and the insertion / extraction slider moving mechanism when the removal / removal of the sub board is completed in the sub board insertion / extraction structure according to the embodiment of the present invention.

9A and 9B schematically show a sub board assembly in a sub board attaching / detaching structure according to an embodiment of the present invention, wherein FIG. 9A is a front view, FIG. 9B is a partial sectional side view, and FIG.

FIG. 10 is a schematic partial cross-sectional view showing a locking structure of a T-shaped handle in a sub-board attaching / detaching structure according to an embodiment of the present invention, wherein FIG.
Indicates the rotation locked state of the T-shaped handle.

FIGS. 11A and 11B are partial cross-sectional views showing a locked state of sub-board assembly in the sub-board attaching / detaching structure according to the embodiment of the present invention, wherein FIG. 11A shows a locked state and FIG. .

12A and 12B show a configuration example to which a sub board insertion / extraction structure (and a detachable structure) according to an embodiment of the present invention is applied, wherein FIG. 12A is a front view and FIG. 12B is a plan view.

13A is a schematic partial view showing an example of a mounting structure of an electronic device having two sub-board insertion / removal structures shown in FIG. 12 and a multi-chip module mounted on the sub-board;
Is a front view, (B) is a plan view, and (C) is a side view.

FIG. 14 is a schematic perspective view for explaining a conventional sub board insertion / extraction structure.

FIG. 15 is a schematic partial perspective view of a conventional sub-board insertion / extraction structure viewed from the back.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 backboard 2 subboard 3 unit frame 4 parallel link 5 rotating projection 6 L-shaped member 7 subboard reinforcing frame 8 L-shaped groove 9 lever force applying member 10 handle 11 board connection connector 12 detachable link 13 backboard fixed Member 14 Sub-board holding member 15 Flat plate link 16 Triangular link 17 Through pin 18 Link rotation protrusion 19 L-shaped handle 20 Handle L-shaped rotation groove 21 Rotation fulcrum 22 Horizontal movement pin 23 Camshaft 24 Rotation bearing 25 Board Inter-connector 26 Insertion / extraction slider 27 Insertion notch 28 Removal notch 29 Insertion / extraction slider connecting member 30 Insertion protrusion 31 Sub board side connector 32 Backboard side connector 33 Insertion / extraction groove 34 Projection 35 Movable housing 36 Extraction protrusion 37 Subboard reinforcement frame 38 Groove Heart Cam 39 U-shaped groove 40 Locking rod 41 Coil spring 42 Pin joint 43 Detachable interlocking member 44 Handle connecting shaft 45 L-shaped vertical groove 46 Sub-board detachable T-shaped handle 47 Pin 48 Locking groove 49 Guide part 50 Notch 51 Unit frame 52 MCM (Multi-chip module) 53 Mounting frame

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toru Kishimoto Nippon Telegraph and Telephone Corporation 3-9-1-2 Nishishinjuku, Shinjuku-ku, Tokyo (72) Inventor Keiichi Yasuda 3--19 Nishishinjuku, Shinjuku-ku, Tokyo No. 2 Inside Nippon Telegraph and Telephone Corporation (72) Hiroki Oka 3-19-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-7-202456 (JP, A JP-A-4-308000 (JP, A) JP-A-5-327245 (JP, A) JP-A-61-33492 (JP, U) JP-A-64-50483 (JP, U) JP-A-55-50 27901 (JP, U) JP-A 1-132372 (JP, U) JP-A 5-2876 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H05K 7/14

Claims (4)

(57) [Claims] 1. A backboard disposed on a back side of a bookshelf mounting configured by mounting an electronic circuit package in a bookshelf shape, and a sub-board disposed on a back side of the backboard; An inter-board connector is provided between the back board and the sub-board, and the back board and the sub-board are connected via the inter-board connector. A backboard-side fixing member and a sub-board holding member are provided on the back surface of the backboard, and a flat plate link and a three-point support type link are connected between the backboard-side fixing member and the subboard holding member. Forming a parallel link, comprising: a support portion rotatably provided on one support portion of the three-point support type link; An L-shaped groove in which a link rotation protrusion is engaged is provided, and an L-shaped handle rotatably supported on the backboard surface via a bearing means with a camshaft as a rotation axis; The camshaft has an insertion notch for moving the insertion / removal slider in one direction in the contact direction of the inter-board connector, and the insertion / removal slider in the non-contact direction of the inter-board connector in the direction opposite to the one direction. A removal notch portion to be moved, wherein the insertion / extraction slider is disposed on the back of the backboard, and a plurality of insertion / extraction sliders are connected by an insertion / extraction slider connecting member. 2. The insertion / extraction slider connecting member includes a projection which abuts on the insertion notch and the extraction notch of the camshaft in response to turning of the L-shaped handle. Item 2. The sub-board insertion / extraction structure according to item 1. 3. A kerf-shaped heart-shaped cam is provided in a reinforcing frame of the sub-board, and a locking rod connected by a pin joint is inserted into a groove of the cam. A handle connecting shaft for holding the kerf-shaped heart-shaped cam to a sub board detachable handle in a state where the urging force of the sub board is applied, and further comprising: The elastic member is pressed by the movement of the locked handle for attaching and detaching the sub-board in a predetermined direction, so that a locking rod is stored in a reinforcing frame of the sub-board, and a locking groove provided in the sub-board holding member. 2. The sub-board insertion / extraction structure according to claim 1, further comprising a sub-board attachment / detachment structure configured to release an end of said locking rod engaged with said sub-board. 4. The handle for attaching and detaching the sub board includes a locking pin on an inner wall fitted with the handle connecting shaft, and the handle connecting shaft includes a groove for engaging with the locking pin. 4. The sub-board insertion / extraction structure according to claim 3, wherein a handle for detaching and mounting the board is freely engageable with and disengageable from the handle connection shaft.