JP2556226B2 - Locking mechanism of printed circuit board unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for a printed board unit having an operating lever which is inserted into and removed from a storage case by guiding a partition wall.

A back panel is generally provided in a storage case in which a plurality of printed board units are removably housed, and a connector mounted on the printed board unit by housing the printed board unit is used. It is formed so as to be connected to the back panel.

The printed board unit housed in such a housing case may be removed from the housing case by vibration, impact, etc., and may be locked by the operating lever so that the connection between the back panel and the connector is not disconnected. Has been done.

[0004]

2. Description of the Related Art Conventionally, the structure is as shown in a conventional explanatory view (No. 1) of FIG. 5 and a conventional explanatory view (No. 2) of FIG. 5 is a perspective view, FIG. 6 (a) is a side view of a main part, and FIG. 6 (b) is an exploded view.

As shown in FIG. 5, a back panel 21 is provided on the rear surface of the storage case 1 partitioned by the partition wall 2 into a shelf shape, and the printed board unit 4 is guided by the partition wall 2 as shown by an arrow A. Is formed so that it can be inserted and removed freely.

Further, the printed board unit 4 is formed by locking the cover 4B to the printed board 4A, the front plate 24 is provided in front of the insertion / removal, and the connector 22 is provided in the rear thereof. An operation lever 20 that is rotated around the main shaft 20-6 is locked to the.

Therefore, when the printed board unit 4 is inserted into the storage case 1 by the guide of the partition wall 2 as shown by the arrow A, it is formed on the operation lever 20 by rotating the operation lever 20 as shown by the arrow F. The lever action point 20-3e is engaged with the engaging portion 3 formed on the partition wall 2, the printed board unit 4 is mounted, and the lever action point 20-3e is rotated in the direction opposite to the arrow F. 3e is removed from the engaging portion 3.

Such an operating lever 20 is shown in FIG. 6 (b).
As shown in, first, the spring support shaft 20 on the side of the lock cam 20-1
-Incorporate the lock cam drive spring 20-2 in -1d,
-1 and the torque lever 20-3 are docked, and the lock cam
The rotary shaft 20-1a and the eject pin 20-1b of 20-1 are inserted into the rotary shaft engaging hole 20-3d and the pin through hole 20-3c on the torque lever 20-3 side, respectively, and the lock cam 20-1 The torque lever 20-3 combined with the lock cam drive spring 20-2 is attached to the lock mechanism mounting portion 24-1 provided on the front plate 24 of the printed board unit 4 along the rotation center O of the lever.

In this case, the lock pawl 20-1c of the lock cam 20-1 is inserted into the lock pawl engaging portion 24-1c formed in the lock mechanism mounting portion 24-1, and the torque lever 20 is inserted into the lever engaging portion 24-1a. -Install so that -3 is dropped.

Next, the torque lever engaging recess 20-5b of the lever 20-5 is replaced by the lever engaging protrusion 20-3b of the torque lever 20-3.
The lever 20-5 is mounted by engaging with. Finally, the bearing hole 20-5a for lever 20-5 and the bearing hole for torque lever 20-3
Main shaft 20-6
And an operating lever 20 is formed.

In this case, the main shaft 20-6 is the head 20
-6a is fitted into the bearing hole 20-5a of the lever 20-5, and the shaft part 20-6
b is fitted in the bearing hole 20-3a of the torque lever 20-3, and
20-6 is a screw hole 24-1b provided in the lock mechanism mounting part 24-1.
It is locked by being screwed on.

Therefore, as shown in (a), when the printed board unit 4 is inserted, the lever 20-5 locked to the front board 24 by the main shaft 20-6 is rotated in the arrow F direction, The lever action point 3e is engaged with the engaging portion 3, and at the same time, the lock claw 20-1c is projected into the lock claw engaging portion 24-1c by the spring force of the lock cam drive spring 20-2, and the lever 20
-5 rotation is locked, and the printed board unit 4 is
To prevent the printed board unit 4 from being pulled out.
By rotating 20-5 in the direction opposite to the arrow F direction, the lock claw 20-1c projected to the lock claw engaging portion 24-1c retracts,
The lever action point 3e is detached from the engaging portion 3 by applying the lever.

Therefore, when the printed board unit 4 is inserted into the storage case 1, the operation lever 20 is rotated in the direction of arrow F so that the printed board unit 4 is not removed, and When removing the printed board unit 4 from the storage case 1, the printed board unit 4 was rotated in the direction opposite to the arrow F so that the printed board unit 4 could be easily inserted and removed.

[0014]

However, such an operating lever 20 is provided with a lock cam 20-1, a lock cam drive spring 20-.
2, torque lever 20-3, lever 20-5, main shaft 20-
6 is expensive, and two such operating levers 20 are required for each printed circuit board unit 4, so when a large number of printed circuit board units 4 are used. , Had the problem of increasing the price.

Further, in such a storage case 1, in the empty space where the printed board unit 4 is not inserted, the cooling air blown to the storage case 1 does not leak from the empty space. In general, inexpensive spacers formed to have substantially the same outer shape as the printed board unit 4 are mounted. Even with such a spacer, the operating lever 20
Since it is necessary to lock the operating lever 20, which is more expensive than the spacer itself, it is uneconomical to lock the operating lever 20.

Therefore, an object of the present invention is to reduce the cost by simplifying the structure.

[0017]

FIG. 1 is a diagram for explaining the principle of the present invention, and as shown in FIGS. 1 (a) and 1 (b), a storage case 1 having a partition wall 2 partitioned in a shelf shape. And the partition wall
Printed board unit 4 which is inserted and removed by the guide of 2,
An operating lever (5) having a locking claw (6) is rotatably locked to both ends of a front plate (8) of the printed board unit (4) by a rotating shaft (7), and when the printed board unit (4) is inserted and removed, the operating lever (5) is provided. When the lock claw 6 is engaged with the engaging portion 3 formed in the partition wall 2 by rotating the 5 in the predetermined direction F about the rotating shaft 7, the printed board unit 4
Is a lock mechanism of the printed board unit in which the printed board unit 4 is removed by rotating the front board in the direction opposite to the predetermined direction F. By inserting it into the bearing portion 10 formed in the elliptical hole 10A provided in 8, the pivot center of the operating lever 5 is formed to be swingable, and the hook portion for dropping the lock pawl 6 is dropped.
9 is provided on the front plate 8, and when the operation lever 5 is rotated in the predetermined direction F, the rotation shaft 7 is rotated by the spring force P.
Is pressed against one of the elliptical holes 10A, and the locking claw 6 is dropped into the hook portion 9 to lock the rotation of the operation lever 5, and the operation lever 5 in the direction opposite to the predetermined direction F.
When the rotation is performed, the rotation shaft 7 moves from one side of the elliptical hole 10A to the other side by the force against the spring force P, and the lock claw 6 is pulled out from the hook portion 9. In order to release the lock, the tongue piece 11 having elasticity is provided on the front plate 8, and the tongue piece 11 is pressed against the projection 5A formed on the operation lever 5 so that the spring force P is increased. The effect is formed.

The above-mentioned problems can be solved by such a configuration.

[0019]

Operation: That is, the rotating shaft 7 for rotating the operating lever 5 is formed so as to be rocked by being held by the bearing portion 10 formed in the oval hole 10A, and the lock claw is also formed.
Install the hook 9 for dropping the 6 on the front plate 8
When the operation lever 5 is rotated to F, the spring force P presses the rotation shaft 7 against one of the elliptical holes 10A,
The lock claw 6 of 5 is dropped into the hook 9 so that the rotation of the operation lever 5 is locked, and when the operation lever 5 is rotated in the direction opposite to the predetermined direction F, the spring The rotation shaft 7 is moved from one side of the elliptical hole 10A to the other side by a force against the force P, and the lock claw 6 is pulled out from the hook portion 9 to release the lock.

Further, the spring force P in this case is formed by providing the tongue piece 11 having elasticity on the front plate 8 and pressing the tongue piece 11 against the projection 5A formed on the operation lever 5. It is a thing.

Therefore, the conventional lock cam 20-
1, a lock cam drive spring 20-2, a torque lever 20-3, a lever 20-5 and an operating lever 20 composed of a main shaft 20-6.
Is unnecessary, and the cost can be reduced by simplifying the configuration.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIGS. 2 is a side view of an embodiment according to the present invention, FIG. 3 is an explanatory view of the present invention, (a1) is a side view of a front plate, (a2) is a front view of the front plate, and (b1) is an operation lever. A plan view, (b2) is a side view of the operating lever, (c1) is a plan view of the rotating shaft, (c2) is a side view of the rotating shaft, and FIG. 4 is a motion explanatory view of the operating lever of the present invention. a)
~ (D) is a side view of the main part. Throughout the drawings, the same reference numerals denote the same objects.

As shown in FIG. 2, the front plate 8 is provided on the front side of the printed board unit 4 formed by mounting the connector 22, and the bearing 10 held by the bearing portion 10 formed on the front plate 8 is provided. By locking the operation lever 5 on the moving shaft 7,
The operation lever 5 is rotatably formed, and the above-mentioned storage case
When inserting the printed board unit 4 into 1, operate the operation lever 5
The lock claw 6 formed on the above is engaged with the engaging portion 3 of the partition wall 2.

As shown in (a1) and (a2) of FIG. 3, the front plate 8 is formed into a prismatic shape, and the recessed portion 8C formed in a stepped shape at both ends has a bearing with an oval hole 10A. The portion 10, the tongue piece 11, the stopper 8A, and the mounting hole 8B that is locked to the printed circuit board 4A are provided, and the operation lever 5 is formed in a U shape as shown in (b1) and (b2). The through hole 5B is provided at the center, the operating portion 5C is provided at one side, the lock claw 6 is provided at the other side, and the protrusion 5A is provided inside the U-shape.The rotary shaft 7 is shown in (c1) and (c2). It is formed like a split pin.

Therefore, by fitting the projection 5A of the operating lever 5 to the cutout portion 8D formed in the concave portion 8C, the operating lever 5 is attached to the concave portion 8C, and the through hole 5B of the operating lever 5 and the bearing portion 10 are attached. By inserting the rotary shaft 7 so as to communicate with the oblong hole 10A, the operation lever 5 is locked to the front plate 8.

According to this structure, when the operation lever 5 is operated so as to engage the lock claw 6 of the operation lever 5 with the engaging portion 3 as shown by arrow F in FIG. When the tip of 6 slides on the guide wall 8E of the front plate 8, the operation lever 5 is rotated around the rotation shaft 7. in this case,
When the projection 5A of the operation lever 5 presses the tongue piece 11, (d)
As shown in Fig. 4, the spring force indicated by arrow P acts on the operating lever 5, and the rotating shaft 7 moves toward the bearing 10 so that a gap S1 is created between the rotating shaft 7 and the oval hole 10A of the bearing 10. Make sure that it is pulled toward one end of the elliptical hole 10A, the tip of the lock claw 6 is dropped into the hook portion 9, and it will not rotate in the opposite direction even if the force of the arrow F applied to the operation portion 5C is removed. You will be locked.

Therefore, when one surface of the lock claw 6 is engaged with the above-mentioned engaging portion 3, at the same time, the other surface of the lock claw 6 is dropped into the hook portion 9 to move the printed board unit 4 in the A direction. It is possible to prevent removal.

When the printed board unit 4 is taken out, the force of arrow F1 is applied to the operating portion 5C as shown in (c),
By applying a force P2 that is larger than the spring force P, the rotating shaft 7 moves in the elliptical hole 10A of the bearing portion 10, and the rotating shaft 7 and the elliptical hole 10A
As a result of the gap shown at S2, the tip of the lock claw 6 is pulled out from the hook portion 9, and the rotation shown at (b) becomes possible to release the lock. In this case, one surface of the lock claw 6 meshed with the engaging portion 3 is taken out from the engaging portion 3.

Further, the rotation in the direction of arrow F1 in this case is
It can be rotated until the projection 5A contacts the stopper 8A. In this way, the bearing portion 10 and the tongue piece 11 are formed on the front plate 8, and the lock mechanism is configured by the operation lever 5 having the lock claw 6 and the rotating shaft 7, which is much simpler than the conventional configuration. It is clear that the cost reduction can be achieved by the conversion.

[0030]

As described above, according to the present invention,
A rotating shaft that locks the operating lever is formed slidably on the bearing part of the front plate, and the tip of the lock claw of the operating lever is dropped into the hook part of the front plate by sliding the rotating shaft. Alternatively, the operation lever can be locked and unlocked by being pulled out.

Therefore, it can be constructed by locking the operation lever to the front plate by the rotating shaft, and the lock cam 20-1, lock cam drive spring 20-2, torque lever
20-3, the lever 20-5, and the main shaft 20-6, compared with the operating lever 20, the configuration can be simplified, the manufacturing cost can be reduced, and the practical effect is great.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a side view of an embodiment according to the present invention.

FIG. 3 is an explanatory diagram of the present invention.

FIG. 4 is an operation explanatory view of the operation lever of the present invention.

FIG. 5 is a conventional explanatory view (No. 1)

FIG. 6 is a conventional explanatory view (No. 2)

[Explanation of symbols]

1 Storage case 2 Partition wall 3 Engagement part 4 Printed board unit 5 Operating lever 6 Lock claw 7 Rotating shaft 8 Front plate 9 Hook part 10 Bearing part 11 Tongue piece 10A Oval hole

Claims (2)

(57) [Claims] 1. A storage case (1) having a partition wall (2) partitioned into a shelf shape, a printed board unit (4) which is inserted and removed by the guide of the partition wall (2), and the printed board unit.
The front plate (8) of (4) is provided with an operating lever (5) which is rotatably locked by a rotary shaft (7) and has a lock claw (6) at both ends of the printed board unit (4). When the operation lever (5) is inserted and removed, the operation lever (5) is rotated about the rotation shaft (7) in a predetermined direction (F), so that the engaging portion (3) formed on the partition wall (2). The printed board unit (4) is inserted by engaging the lock claw (6) with the lock tab (6), and the printed board unit (4) is rotated by being rotated in the direction opposite to the predetermined direction (F). A lock mechanism for a printed board unit to be removed, wherein the rotary shaft (7) is an elliptical hole (10A) provided in the front plate (8).
The operating lever (5) is pivotally formed by being inserted into the bearing portion (10) formed on the inner surface of the operating lever (5), and the hook portion (9) into which the lock claw (6) is dropped is formed. When the operation lever (5) is provided in the front plate (8) and the operation lever (5) is rotated in the predetermined direction (F), the rotation shaft (7) is moved by the spring force (P) so that the oval hole (7) 10A), the locking claw (6) is dropped into the hook (9) to lock the rotation of the operation lever (5), and the direction opposite to the predetermined direction (F). The operating lever
When the rotation of (5) is performed, the rotation shaft (7) is moved from one side of the oval hole (10A) to the other side by the force against the spring force (P), and the lock claw (6 ) Is pulled out from the hook portion (9) to unlock the lock mechanism of the printed board unit. 2. The front plate (8) according to claim 1 is provided with an elastic tongue (11), and the tongue (11) is the operating lever.
By pressing the protrusion (5A) formed on (5),
A locking mechanism for a printed circuit board unit, characterized in that the action of (P) is formed.