JPH062767U - Printed circuit board attachment / detachment mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a mechanism for attaching and detaching a printed circuit board, which has an inexpensive and simple lock lever and can securely mount the printed circuit board in a box-shaped housing. [Structure] Since the printed circuit board 1 is sandwiched, the lock lever 9 is bifurcated into a thick piece portion 9a on one surface side of the printed circuit board 1 and a thin piece portion 9b on the other surface side of the printed circuit board 1. The thick piece portion 9a and the thin piece portion 9b are connected by a connecting portion 9c in a U-shape having a groove 9d.
The lock lever 9 is rotatably supported with respect to the printed board 1 by a rotary shaft 11 having an axis perpendicular to the surface of the printed board 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mechanism for attaching and detaching a printed circuit board.

[0002]

[Prior art]

 FIG. 3 is an overall perspective view showing a conventional printed circuit board attaching / detaching mechanism. In the figure, reference numeral 1 is a printed circuit board, and 2 is a box-shaped housing in which a plurality of the printed circuit boards 1 are arranged side by side and can be inserted and removed in a direction along the surface of the printed circuit board 1. 3 is a package connector provided on the front end side of the printed circuit board 1 in the insertion direction into the box-shaped housing 2; and 4 is a box type which is the back side of the box-shaped housing 2 in the direction in which the printed circuit board 1 is inserted. It is a backboard connector provided on the back side of the housing 2 and connected to the package connector 3.

Reference numeral 5 denotes an insertion / removal lever, and the insertion / removal lever 5 is rotatably provided on both end sides of the rear end side of the printed circuit board 1 having an axis line perpendicular to the surface of the printed circuit board 1. Reference numeral 6 denotes a lock lever. The lock lever 6 is rotatably provided on the rear end side of the printed circuit board, inside each of the insertion / removal levers 5 and having an axis line perpendicular to the surface of the printed circuit board 1.

FIG. 4 is an explanatory view showing the essential parts of the insertion / extraction lever and the lock lever, which are the conventional mechanism for attaching / detaching a printed circuit board, and FIG. 5 is a side view of the conventional lock lever. Reference numeral 5a is a fulcrum that serves as a rotation center of the insertion / extraction lever 5, and 5b is a locking portion provided on the insertion / removal lever 5. The locking portion 5b is provided after the printed circuit board 1 is inserted into the box-shaped housing 2 Is rotated in the direction of arrow A about the fulcrum 5a as the center of rotation to engage with the inner surface 2a of the open end of the box-shaped housing 2. Reference numeral 5c denotes a push-out portion provided on the insertion / extraction lever 5 facing the locking portion 5b at a predetermined distance. The push-out portion 5c is inserted / removed in order to take out the printed circuit board inserted in the box-shaped casing 2. By rotating the lever 5 in the direction of the arrow B about the fulcrum 5a as the center of rotation, the lever 5 abuts against the outer surface 2b at the open end of the box-shaped housing 2.

Reference numeral 5 d denotes a locking portion provided on the insertion / extraction lever 5, and this locking portion 5 d engages with a locking portion, which will be described later, provided on the lock lever 6. Reference numeral 5e denotes a push-in portion provided on the insertion / removal lever 5 in a pair with the locking portion 5d, and the push-in portion 5e contacts a push-out portion provided on the lock lever 6 which will be described later. Reference numeral 5f is a knob portion provided on the insertion / extraction lever 5.

Reference numeral 6a is a fulcrum which is the center of rotation of the lock lever 6, and this fulcrum 6a has a rotary shaft 7 having an axis perpendicular to the surface of the printed board 1 on one side of the printed board 1, as shown in FIG. The lock lever 6 is provided so as to be rotatably supported by the rotary shaft 7 with respect to the printed circuit board 1. Reference numeral 6b denotes a push-out portion provided on the lock lever 6, and the push-out portion 6b comes into contact with the push-in portion 5e of the insertion / extraction lever 5 as described above. Reference numeral 6c is a locking portion provided on the lock lever 6 so as to face the push-out portion 6b, and the locking portion 6c engages with the locking portion 5d of the insertion / extraction lever 5 as described above. 6d is a finger hook portion provided on the lock lever 6.

When the printed board 1 is inserted into the box-shaped housing 2 to connect the package connector 3 and the backboard connector 4, the printed board 1 is inserted to a predetermined position of the box-shaped housing 2 and the insertion / extraction lever is inserted. When 5 is rotated in the direction of arrow A, the push-out portion 6b of the lock lever 6 and the push-in portion 5e of the insertion / extraction lever 5 come into contact with each other (state shown in FIG. 4 (a)). By further rotating the insertion / removal lever 5 in the direction of arrow A, the push-out portion 6b of the lock lever 6 is pushed by the pushing-in portion 5e of the insertion / removal lever 5 and rotated in the direction of arrow C. As a result, the locking portion 5d of the insertion / removal lever 5 and the locking portion 6c of the lock lever 6 are engaged, and the rotation of the insertion / removal lever 5 is fixed (the state shown in FIG. 4B). At this time, the locking portion 5b of the insertion / removal lever 5 and the inner surface 2a of the opening end portion of the box-shaped housing 2 are engaged with each other, and the rotation of the insertion / removal lever 5 is fixed, so that the printed circuit board 1 is boxed. It cannot be removed from the mold housing 2.

Here, 8 is a stopper provided on the printed circuit board 1, which locks when the print circuit board 1 is inserted into the box-shaped housing 2 and the insertion / extraction lever 5 is rotated in the direction of arrow A. The rotation amount of the lock lever 6 is regulated so that the push-out portion 6b of the lever 6, the push-in portion 5e of the insertion / removal lever 5, the locking portion 6c of the lock lever 6 and the locking portion 5d of the insertion / removal lever 5 can always engage with each other. There is.

Next, a procedure for taking out the printed board 1 from the box-shaped housing 2 will be described. First, in order to release the engagement between the locking portion 6c of the lock lever 6 that fixes the rotation of the insertion / removal lever 5 and the locking portion 5d of the insertion / removal lever 5, push the finger hook 6d in the direction of arrow E to lock the lever. 6 is rotated in the direction of arrow D with the fulcrum 6a as the center of rotation. When the lock lever 6 rotates in the direction of the arrow D, the engagement between the locking portion 6c of the lock lever 6 and the locking portion 5d of the insertion / extraction lever 5 is released. At this time, the push-out portion 6b of the lock lever 6 pushes the push-in portion 5e of the insertion / extraction lever 5, the insertion / extraction lever 5 slightly rotates in the direction of arrow B about the fulcrum 5a, and the knob portion 5f of the insertion / extraction lever 5 and the print A gap is formed between the board end of the board 1 and an operating finger. As a result, the knob portion 5e is lifted and the insertion / extraction lever 5 is further rotated in the direction of the arrow B, so that the push-out portion 5c of the insertion / extraction lever 5 pushes the outer surface 2b of the opening end of the box-shaped housing 2 and the printed circuit board 1 Are taken out from the box-shaped housing 2.

[0010]

[Problems to be solved by the device]

 However, the conventional printed circuit board attachment / detachment mechanism described above has the following problems. FIG. 6 is a side view showing a problem of the conventional lock lever. That is, in the lock lever 6, as shown in FIG. 5, the rotating shaft 7 is provided perpendicularly to the printed board 1, and the lock lever 6 rotates in parallel with the surface of the printed board 1.

However, since the lock lever 6 is supported by the printed circuit board 1 only on one side of the rotary shaft 7, the state shown in FIG. When the printed circuit board 1 is repeatedly attached and detached, the force may be concentrated on the side of the rotary shaft 7 supported by the printed circuit board 1, and the rotary shaft 7 may be loosened or deformed. Therefore, as shown in FIG. 6, there is a problem that the lock lever 6 is tilted to make it difficult to engage with the insertion / removal lever 5, or rattling occurs even if it is engaged. Further, in order to reliably and easily obtain the engagement between the insertion lever 5 and the lock lever 6, the stopper 7 for controlling the rotation amount of the lock lever 6 is required as a separate component.

The present invention has been made to solve such a problem. Even when force is applied to the lock lever, the rotation shaft supporting the lock lever does not tilt or deform with respect to the printed circuit board. Provided is a printed circuit board attachment / detachment mechanism that keeps this lock lever rotatable parallel to the surface of the printed circuit board at all times and can regulate the amount of rotation within a certain range without using a stopper as a separate component. The purpose is to do.

[0013]

[Means for Solving the Problems]

 In order to achieve this object, the present invention accommodates a printed circuit board so that the printed circuit board can be inserted and removed in the direction along the surface, and electrically connects to a package connector provided on the front end side of the accommodated printed circuit board. A box-shaped casing having a backboard connector, and an opening of the box-shaped casing rotatably supported on at least one end side of the rear end side of the printed circuit board with an axis line perpendicular to the surface of the printed circuit board. It has an insertion / extraction lever that engages with the end part and attaches / detaches the printed circuit board to / from the box-shaped housing by rotating, and an axis line that is perpendicular to the surface of the printed circuit board. Lock lever that is supported as much as possible, rotates by being pushed by the insertion / ejection lever, engages with this insertion / ejection lever, and fixes the rotation of the insertion / ejection lever at a position where the printed circuit board cannot be taken out from the box-shaped housing. In the provided printed circuit board attachment / detachment mechanism, the lock lever is formed with a bifurcated U-shaped groove for sandwiching the printed circuit board, and is rotatably supported via shafts on both sides of the printed circuit board. At the same time, the rotation amount of the lock lever is restricted by the contact between the bottom of the U-shaped groove and the plate end of the printed circuit board.

[0014]

[Action]

 According to the present invention having the above-described configuration, when the printed circuit board is inserted, the insertion / extraction lever is rotated to engage the insertion / extraction lever with the opening end of the box-shaped casing, and the lock lever is rotated by being pushed by the insertion / extraction lever. Then, the insertion / extraction lever and the lock lever are engaged with each other to fix the rotation of the insertion / extraction lever, so that the printed circuit board cannot be taken out from the box-shaped housing.

Here, when the lock lever is pushed by the insertion / extraction lever to rotate, the lock lever holds the printed circuit board in between and is supported on both sides of the printed circuit board via the rotary shaft, so that the force applied to the lock lever is increased. Even if the lock lever is applied, the rotating shaft does not loosen, deform, or tilt, which causes the lock lever to tilt and cannot engage with the insertion / removal lever, or the lock lever rattles to make sure that it is securely connected to the insertion / removal lever. It is possible to prevent the impossible engagement. Further, since the rotation amount of the lock lever is regulated by the contact between the bottom of the U-shaped groove and the plate end of the printed circuit board, a stopper as a separate component is unnecessary.

[0016]

【Example】

 Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a printed circuit board attaching / detaching mechanism according to the present invention. In the present embodiment, the parts having the same configurations as the conventional ones are denoted by the same reference numerals as the conventional ones, and detailed description thereof will be omitted. Reference numeral 1 denotes a printed circuit board, which is not shown here, but as described in the related art FIG. 3, the front end side of the printed circuit board 1 is a package connected to a backboard connector provided on the back side of the box-shaped housing. A connector is provided.

Reference numeral 9 denotes a lock lever, and the lock lever 9 is rotatably provided on the rear end side of the printed circuit board 1 at least on one end side thereof and having an axis line perpendicular to the surface of the printed circuit board 1. There is. Reference numeral 10 denotes an insertion / removal lever. The insertion / removal lever 10 is rotatably provided outside the lock lever 9 on at least one end side of the rear end side of the printed circuit board 1 and having an axis line perpendicular to the surface of the printed circuit board 1. Has been.

2A and 2B are explanatory views showing the lock lever in this embodiment, FIG. 2A is a front view, and FIG. 2B is a side view. Since the lock lever 9 sandwiches the printed circuit board 1, the thick piece portion 9a that constitutes the lock lever 9 on one side of the printed circuit board 1 and the lock lever 9 on the other side of the printed circuit board 1 are sandwiched. And a thin piece portion 9b constituting a fork, and has a connecting portion 9c for connecting the thick piece portion 9a and the thin piece portion 9b. The thick piece portion 9a and the thin piece portion 9b are connected by the connecting portion 9c to form a printed circuit board. It is connected in a U shape having a groove 9d having a width substantially equal to the thickness of 1.

Reference numeral 11 denotes a rotary shaft that rotatably supports the lock lever 9 sandwiching the printed circuit board 1 with respect to the printed circuit board 1. The axis of the rotary shaft 11 is on the surface of the printed circuit board 1 as described above. It is perpendicular to it. Reference numeral 12 is a first extruding portion provided on the thick piece portion 9a side of the lock lever 9, and 13 is a second extruding portion provided on the thin piece portion 9b side of the lock lever 9. Reference numeral 14 is a locking portion provided on the thick piece portion 9a side of the lock lever 9, and 15 is a finger hook portion provided on the thick piece portion 9a side of the lock lever 9.

Reference numeral 16 denotes a first pushing portion provided on the insertion / extraction lever 10, and the first pushing portion 16 contacts the first pushing portion 12 provided on the thick piece portion 9a side of the lock lever 9 described above. Reference numeral 17 denotes a second pushing portion provided on the insertion / extraction lever 10 side by side with the first pushing portion 16, and the second pushing portion 17 is the second pushing portion 13 provided on the thin piece portion 9b side of the lock lever 9 described above. Abut. Reference numeral 18 denotes a locking portion, which is not shown here, but engages with the inner surface of the box-shaped casing to insert the printed circuit board 1 into the box-shaped casing, as described in the prior art. Used as a step. Reference numeral 19 denotes a push-out portion, and this push-out portion 19 is also used as a means for taking out the printed circuit board 1 from the box-shaped housing by coming into contact with the outer surface of the box-shaped housing, which is not shown here.

The locking portion 18 and the push-out portion 19 are also provided on the first push-in portion 16 side of the insertion / extraction lever 10 with the printed circuit board 1 sandwiched therebetween although not shown. Further, although not shown, similarly to the prior art, the insertion / removal lever 10 is provided with a locking portion that engages with the locking portion 14 of the lock lever 9. Reference numeral 20 denotes a rotary shaft that rotatably supports the insertion / extraction lever 10 with the printed circuit board 1 sandwiched therebetween, and the axis of the rotary shaft 20 is relative to the surface of the printed circuit board 1 as described above. Vertical.

When the printed circuit board 1 is inserted into the box-shaped casing, the printed circuit board 1 is inserted to a predetermined position of the box-shaped casing, and the insertion / extraction lever 10 is rotated in the arrow F direction. The first push-out portion 12 and the first push-in portion 16 of the insertion / extraction lever 10 come into contact with each other, and the second push-out portion 13 of the lock lever 9 comes into contact with the second push-in portion 17 of the insertion / extraction lever 10.

Further, by rotating the insertion / removal lever 10 in the direction of arrow F, the first push-out portion 12 of the lock lever 9 is pushed by the first push-in portion 16 of the insertion / removal lever 5, and at the same time the second push-out portion 13 is moved to the first push-out portion 13. 2 Pushed by the push-in portion 17 to rotate in the direction of arrow G. As a result, similarly to the conventional technique, the locking portion (not shown) of the insertion / removal lever 10 and the locking portion 14 of the lock lever 9 are engaged with each other to fix the rotation of the insertion / removal lever 10.

When the printed circuit board 1 is taken out from the box-shaped case, the engagement between the locking portion 14 of the lock lever 9 that fixes the rotation of the insertion / removal lever 10 and the locking portion (not shown) of the insertion / removal lever 10 is released. In order to do so, the finger hook 15 is pushed in the direction of arrow H to rotate the lock lever 9 in the direction of arrow I with the shaft 11 as the center of rotation. When the lock lever 9 rotates in the direction of arrow I, the engagement between the locking portion 14 of the lock lever 9 and the locking portion (not shown) of the insertion / extraction lever 10 is released. At this time, the first push-out portion 12 of the lock lever 9 pushes the first push-in portion 16 of the insertion / extraction lever 10, and the second push-out portion 13 of the lock lever 9 pushes the second push-in portion 17 of the insert / extract lever 10. Then, the insertion / removal lever 10 slightly rotates in the direction of the arrow J, and a gap is formed between the knob portion 21 of the insertion / removal lever 10 and the plate end portion of the printed circuit board 1 to the extent that a finger for operation can be inserted. As a result, the knob portion 21 is lifted and the insertion / extraction lever 10 is further rotated in the direction of the arrow J, so that the push-out portion 19 of the insertion / extraction lever 10 pushes the outer surface of the opening end of the box-shaped housing, and the printed circuit board 1 becomes box-shaped. It is taken out from the case.

Here, when the printed circuit board 1 is inserted into the box-shaped housing, the insertion / extraction lever 10 pushes the lock lever 9 to rotate it, so that the insertion / extraction lever 10 and the lock lever 9 are engaged with each other. At this time, as described above, the first push-in portion 16 of the insertion / extraction lever 10 pushes in the first push-out portion 12 of the lock lever 9 and the second push-in portion 17 of the insert / extract lever 10 is placed on both sides with the printed circuit board 1 interposed therebetween. The second push-out portion 13 of the lock lever 9 is pushed in, the force is evenly applied to the rotary shaft 11, and the rotary shaft 11 tilts with respect to the printed circuit board 1 or the rotary shaft 11 tilts to lock the lever lever. It does not happen that the lock lever 9 and the insertion / extraction lever 10 cannot engage with each other due to backlash in the -9.

The rotation amount of the lock lever 9 is determined by the bottom of the groove 9d surrounded by the thick piece portion 9a, the thin piece portion 9b and the connecting portion 9c in a U-shape and the plate end of the printed circuit board 1. The amount of rotation of the lock lever 9 can be adjusted by changing the distance between the bottom of the groove 9d and the plate end of the printed circuit board 1.

[0027]

[Effect of device]

 As described above, the present invention has an axis perpendicular to the surface of the printed circuit board and is rotatably supported by the printed circuit board, and is pushed by the insertion / extraction lever to rotate to engage with the insertion / extraction lever. , The lock lever for fixing the rotation of the insertion / extraction lever is formed with a U-shaped groove that is bifurcated to sandwich the printed circuit board, and is rotatably supported on both sides of the printed circuit board via a shaft. The rotation amount of the lock lever is regulated by the contact between the bottom of the U-shaped groove and the plate edge of the printed circuit board.

Therefore, even if a force is applied to the lock lever by being pushed by the insertion / extraction lever, the lock lever holds the printed circuit board in between and is supported on both sides of the printed circuit board via the rotary shaft, so that the rotary shaft is supported. Does not loosen, deform or tilt, which may cause the lock lever to tilt so that it cannot engage with the insertion / removal lever, or the lock lever rattles to prevent reliable engagement with the insertion / removal lever. Has the effect of being prevented. Further, since the rotation amount of the lock lever is regulated by the contact between the bottom of the U-shaped groove of the lock lever and the plate end of the printed board, a stopper as a separate component is not required. In addition to the effects, it has an effect that it has a lock lever that is inexpensive and simple, and that it can realize a mechanism for attaching and detaching a printed circuit board that can be surely inserted into and removed from the box-shaped housing and mounted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a mechanism for attaching and detaching a printed circuit board according to the present invention.

FIG. 2 is an explanatory diagram showing a lock lever in the present embodiment.

FIG. 3 is an overall perspective view showing a conventional printed circuit board attachment / detachment mechanism.

FIG. 4 is an explanatory view of a main part of a conventional printed circuit board attachment / detachment mechanism.

FIG. 5 is a side view of a conventional lock lever.

FIG. 6 is a side view showing a problem of a conventional lock lever.

[Explanation of symbols]

 1 Printed Circuit Board 9 Lock Lever 9a Thick Piece 9b Thin Piece 9c Connection 9d Groove 11 Rotating Shaft 12 First Extrusion 13 Second Extrusion

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Osamu Ibaraki 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Tomoji Nunokawa 6-18-12, Megurohonmachi, Meguro-ku, Tokyo No. Honda Telecommunication Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A box-shaped casing having a backboard connector that accommodates a printed circuit board so that the printed circuit board can be inserted and removed in a direction along a surface of the printed circuit board, and that is electrically connected to a package connector provided on a front end side of the accommodated printed circuit board. A body and at least one end side of the rear end side of the printed circuit board, which is rotatably supported with an axis perpendicular to the surface of the printed circuit board, engages with the open end of the box-shaped housing, and rotates. By doing so, it has an insertion / extraction lever for attaching / detaching the printed circuit board to / from the box-shaped housing, and has an axis line perpendicular to the surface of the printed circuit board. Detachment of the printed circuit board provided with a lock lever that pushes and rotates to engage this insertion / extraction lever and lock the rotation of the insertion / extraction lever at a position where the printed circuit board cannot be taken out from the box-shaped housing. In the structure, the lock lever is formed with a bifurcated U-shaped groove for sandwiching the printed circuit board, and is rotatably supported via a shaft on both sides of the printed circuit board. A mechanism for attaching and detaching a printed circuit board, wherein the rotation amount of the lock lever is regulated by the contact between the bottom of the groove and the plate edge of the printed circuit board.