JPH04188794A - Mechanism for inserting and drawing out printed board - Google Patents

Abstract

PURPOSE:To get a guard lever, whose substantial length increases in operation and which is folded in writing and gets in compact condition by constituting it of the three parties of a main body member, which has a hook part and a pressing part, an arm member, which transmits torque, and a stopper member, with which the arm member can rotate between the extensive position and the retreat position. CONSTITUTION:This comprises a main body member 1, an arm member 10, and a stopper member 20, and in the condition that the mounting part of the arm member 10 is set freely inside the slit of the main body member 1, the arm member 10 is born to the main body member 11 by the pin through pin holes 5 and 14. The card lever being assembled this way is attached, being born by the pin 7 through the pin hole 6, to corner of the front end of the printed board. And the arm member 10 rotates between the curvature position A, where it is folded to the main body member 1, and the extensive position B, where it has rotated in the direction of an arrow. Hereby, the arm member 10 can be shortened, being folded in the curvature position in nonoperation, and can be extended only in operation and can be drawn out effectively.

Description

[Detailed Description of the Invention] [Summary] A card for easily inserting and removing a plurality of printed circuit boards mounted on a shelf when configuring an electronic device by accommodating a plurality of printed circuit boards mounted with electronic components in parallel in a shelf. Regarding the new configuration of the lever, the purpose is to provide a card lever that increases in substantial length when in operation and folds into a compact state when idle, and includes a printed circuit board that is connected to a backboard in the shelf by a connector. The card lever includes a card lever pivotally supported on the upper and lower floors of the front edge of the printed circuit board in order to insert and remove the card from the shelf, and the card lever includes: (a) a main body member having a hook portion and a pressing portion facing each other; (b) an arm member that is pivotally supported by the main body member, is rotatable between an extended position and a bent position, and contacts the main body member in the extended position to transmit rotational force thereto; (C) The arm member is pivotally supported by the arm member, and is rotatable relative to the arm when the arm member is in the extended position, and prevents the arm member from returning to the bent position, and also prevents the arm member from rotating by coming into contact with the main body member. The stopper member is rotatable between a locking position where power is transmitted to the main body member and a retracted position where the arm member is not prevented from returning to the bent position.

[Industrial Application Field] The present invention provides a method for easily inserting and removing a plurality of printed circuit boards with electronic components onto and from the shelf when configuring an electronic device by accommodating a plurality of printed circuit boards with electronic components in parallel in a shelf.
This invention relates to a new configuration of a card lever.

[Conventional technology]

Electronic devices are constructed by accommodating printed circuit boards on which electronic components such as L and SI are mounted in parallel on a shelf, and fitting connectors attached to the rear edge to connector pins on a backboard provided inside the shelf. It is common to have a structure in which the printed circuit board is connected and fixed by frictional fitting force between the two.

In order to overcome this frictional fitting force and insert/remove the printed circuit board from the shelf, card levers 52 are pivotally supported by bins 53 on the upper and lower floors of the front edge of the printed circuit board 51, as shown in FIG. . This card lever 5
2 has a hook portion 54 and an arm portion 55, and when the printed circuit board 51 is inserted into the shelf 56, the hook portion 54 at the tip thereof is hooked into a groove 58 provided at the front edge of the shelf. . Then, by rotating the arm portion 55 in the counterclockwise direction shown by the arrow in the figure with his fingers, the operator pushes the inner wall of the groove 58 with the hook portion 54, and the printed circuit board 51 is further pushed into the shelf 56 by the reaction. , and mate with the connector pins on the backboard. Conversely, when pulling out the printed circuit board, the arm portion 55 is rotated clockwise and the suppressing portion 57 provided facing the hook portion 54 is pulled out in front of the shelf 56 as shown by the chain line. The configuration is such that when the edge is pressed, the frictional fit of the connector is loosened by the reaction, and the printed circuit board 51 is pulled out in the direction of arrow B.

BACKGROUND ART In recent electronic devices, the number of connector pins tends to increase due to the development of high-density packaging, and the force required to insert and remove printed circuit boards has also increased.

As a countermeasure to this problem, the arm portion of the card lever is lengthened to reduce the operating force.

[Problem to be solved by the invention]

However, extending the arm portion of the card lever results in a reduction in the mounting space for display components, switches, etc. installed on the front of the printed circuit board, and a countermeasure is required.

SUMMARY OF THE INVENTION In order to solve the problems of the prior art, it is an object of the present invention to provide a card lever that substantially increases in length when in operation and is folded into a compact state when on standby.

[A means of saving to solve problems]

The purpose of this is to insert and remove a printed circuit board connected to a backboard in the shelf by inserting it into and removing it from the shelf. a) a main body member having a hook portion and a suppressing portion facing each other that are engageable in a groove provided in a front edge of the shelf; (b) pivotally supported by the main body member and pivotable between an extended position and a bent position; (C) an arm member that is pivotally supported by the arm member and that is in contact with the main body member in the extended position and transmits rotational force to the main body member; a locking position in which the arm member is rotatable and prevents the arm member from returning to the bent position and contacts the main body member to transmit rotational force of the arm member to the main body member; and a locking position in which the arm member is in the bent position. This is achieved by a printed circuit board insertion/extraction mechanism that is comprised of three parts, including a stopper member that is rotatable between a retracted position and a retracted position that does not prevent return.

[Effect]

When inserting a printed circuit board, rotate the arm member to the extended position with the hook part of the main body member engaged with the groove on the front edge of the shelf, and continue to rotate the arm member, so that the main body member also rotates. The hook portion presses against the inner wall of the groove. The recoil forces the printed circuit board into the shelf, and its connectors engage the connector bins on the packboard, locking it in place. Thereafter, the arm member is rotated to the bent position and folded into a compact size while maintaining the stopper member at the retracted position.

To remove the printed circuit board, first, the arm member is rotated to the extended position and the stopper member is moved to the locking position. When the arm member is rotated in the opposite direction to the direction of insertion, the main body member also rotates due to the action of the stopper.
The front edge of the shelf is pressed by the suppressing portion, and the reaction loosens the friction fit between the connector of the printed circuit board and the connector pin of the backboard, allowing the printed circuit board to be pulled out.

Hereinafter, the present invention will be explained in more detail based on preferred embodiments shown in the drawings.

〔Example〕

The card lever constituting the present invention consists of three parts shown in FIGS. 1 to 3: a main body member 1. It consists of an arm member 10 and a stopper member 20, each of which is shown in a perspective view in FIG.

As shown in the figure, the main body member 1 has an upper half cut into two to form a slit 2 having an arc-shaped bottom wall, and a lower half with a hook portion 3 protruding downward and facing the slit 2. It consists of a suppressor section 4. A bottle hole 5 is provided at the upper end of the main body member 1 across the slit 2, and a bottle hole 6 is also provided near the hook portion 3.

The arm member 10 has a mounting portion 11 that can be fitted into the slit 2 of the main body member 1 and a handle 1 that hangs downward from the mounting portion 11.
It is composed of 2.

The mounting part 11 is a slit 13 that is cut into two parts except for the base part connected to the handle 12 and has a horizontal ceiling wall.
is formed. A bottle hole 14 corresponding to the bottle hole 5 of the main body member is provided passing through the base, and a bottle hole 15 is further provided across the slit 13.

The stopper member 20 is a small strip-shaped piece having a thickness that allows it to fit into the slit 13 of the arm member 10, and has a bottle hole 21 corresponding to the bottle hole 15 of the arm member 10 at one end thereof.
is provided, and a claw 22 protrudes from the other end.

These three parts are assembled as follows.

First, with the stopper member 20 loosely fitted in the slit 13 of the arm member 10, the stopper member 20 is pivotally supported on the arm member 10 by the pin 23 through the pin holes 15 and 21. At this time, the fitted state between the pin 23 and the bottle hole 15.21 is such that the stopper member does not move under its own weight relative to the arm member, but the position of both can be determined arbitrarily by forcibly moving it with a finger. Satoru.

To attach the arm member 10, the arm member 10 is pivotally supported to the main body member 1 by a pin 16 through the pin holes 5 and 14 with the portion 11 loosely fitted into the slit 2 of the main body member 1.

The card lever of the present invention assembled in this manner is attached to the corner of the front edge of the printed circuit board 51 by being pivotally supported by the pin 7 through the pin hole 6 as usual.

The card lever includes an arm member 10 as shown in FIG.
is folded with respect to the main body member 1, and the sixth
As shown in the figure, it is rotatable between extended positions B rotated in the direction of the arrow.

In the extended position B, the arm member 10 is prevented from being displaced relative to the main body member 1 by the region a of the handle 12 coming into contact with the region b (see No. 4!!l) of the main body member.
Further rotation of the handle 12 in the direction of the arrow causes rotation of the main body member l itself around the bottle 7.

When the arm member 10 is in the extended position B, the stopper member 20 is in the retracted position shown in FIG. 7(d) and in the retracted position shown in FIG.
It is rotatable between locking positions C shown in C).

Next, a method of inserting and removing the printed circuit board 51 from the shelf 56 using this card lever will be explained. This explanation is about the card lever attached to the bottom of the printed circuit board, but the card lever attached to the top is just in the opposite position, and the essential structure remains the same.

Insertion Sequence FIG. 7(a) shows a state in which the printed circuit board 51 is inserted into the shelf 56 and is in a position immediately before being connected to the backboard with a connector. At this time, the card lever is in the folded position, and the hook portion 3 of the main body member 1 is attached to the shelf 56.
It is located just in front of the leading edge of.

(b) shows a state in which the printed circuit board 51 is pushed in a little further, and the hook part 3 goes over the front edge of the shelf and matches the inner wall of the groove 58.

Here, when the arm member 10 is moved to the extended position as shown in (C) and the handle 12 is further rotated in the direction of the arrow as shown in (d), the hook portion 3 is attached to the inner wall of the groove 58. When they come into contact with each other, a forward force is applied to the printed circuit board 51 using this point as a fulcrum, thereby overcoming the frictional force during connector connection and pushing it into the interior of the shelf.

Thereafter, as shown in (e), (f), and (g), the handle 12 is rotated in the direction of the arrow to move the arm member 10 to the bent position A.

Removal sequence To pull out the printed circuit board 51 inserted into the shelf in this way, as shown in FIG. 8(a),
The handle 12 is rotated in the direction of the arrow to move the arm member 10 to the extended position. Next, as shown in (b), the stopper member 20 is rotated in the direction of the arrow to move to the locking position C. At this time, the tip with the claw 22 is directed toward the recess 8 provided at the bottom of the slit 2 of the main body member 1.

Next, as shown in (C), when the handle 12 is rotated in the direction of the arrow, the claw 22 of the stopper member 20 moves into the recess 8 of the main body member 10.
The stopper member 20 is kept in an upright position by contacting the handle member 1 and prevents further rotation of the handle 12 relative to the main body member 1. In this state, when a rotational force is further applied to the handle 12 in the direction of the arrow, the rotational force is transmitted to the main body member 1, as shown in (d), and the main body member 1 rotates around the bottle 7 and grips the handle 1.
2, and the pressing portion 4 is brought into contact with the front edge of the shelf 56. When the handle 12 is further rotated, a pulling force is applied to the printed circuit board 51 using the corresponding contact portion as a fulcrum, loosening the friction fit of the connector connection with the backboard, and pulling it out as shown in (e). It can be done.

9 to 11 show an example in which a part of the above-described embodiment is modified to further strengthen the fixation of the printed circuit board within the shelf.

According to this, the arm member is attached by providing a hook-shaped protrusion 17 as shown in FIG. 9 on the part 11, and correspondingly, an engaging piece 30 as shown in FIG. 10 on the printed circuit board side. Fixed. The hook-shaped projection 17 and the engaging piece 30 move the handle 12 to the bent position A as shown in FIGS. 11(a) and 11(b) when the printed circuit board 51 is fully inserted into the shelf 56. It engages by rotating and locks the position of the printed circuit board 51. It will be obvious that when the printed circuit board is removed, the lock is released by performing the opposite operation.

〔Effect of the invention〕

As described in detail above, according to this embodiment, the arm member of the card lever is folded to the bent position when not in operation to shorten its length, and is extended only when in operation to effectively perform the lever action. This makes it possible to cope with an increase in the frictional fitting force of connector connection due to an increase in the number of connector bins without increasing the installation space.

Furthermore, by providing a locking mechanism on the card lever that can be engaged or released by rotation of the arm member, the printed circuit board can be further prevented from being pulled out.

[Brief explanation of drawings]

1 to 3 are three-sided views of each component constituting the card lever of the present invention, FIG. 4 is a perspective view of each component, and FIG. 5 is a card of the present invention occupying a bent position. FIG. 6 is a side cross-sectional view of the card lever of the present invention in the extended position; FIGS. 7(a) to (g) are illustrations of insertion of a printed circuit board by the card lever of the present invention; FIG. Side view showing the procedure, Figure 8(a) ~
(e) is a side view showing the removal procedure; FIG. 9 is a side view of an arm member according to another embodiment of the present invention; FIG. 10 is a perspective view of the engagement piece; ), (b) are side views showing the locking procedure according to this embodiment, and FIG. 12 is a side view showing the action of the conventional card lever. 1 Main body member, 2 Slit, 3 Hook portion, 4 Pressing portion, 10 Arm member, 11 Mounting portion, 12 Handle, 13 Slit, 17 Hook-shaped projection, 20 Stopper member, 30 Engagement piece, 51 Printed circuit board, 56 Shelf , 58 groove. Figure 2: Three-view view of the arm member; Figure 2: Two-view view of the stopper member; perspective view of each member; Figure 4: side view of the card lever of the present invention occupying the bent position; Side view of the card lever Figure 6 Side view showing the locking procedure Side view showing the locking procedure Answer 12

Claims (2)

[Claims] 1. The card levers are pivotally supported at the upper and lower corners of the front edge of the printed circuit board in order to insert and remove the printed circuit board connected to the backboard in the shelf by the connector, and the card levers are (a) facing each other; a main body member (1) having a hook portion (3) and a pressing portion (4);
b) is pivotally supported by the main body member (1) and is rotatable between an extended position (B) and a bent position (A), and the extended position (B)
an arm member (10) that comes into contact with the main body member (1) and transmits rotational force thereto; (c) the arm member (
10), and the arm member (10) is in the extended position (B
), the arm member (10) can be rotated relative to the arm member (10), and the arm member (10) is prevented from returning to the bent position (A), and the arm member ( 10) between a locking position (C) where the rotational force is transmitted to the main body member (1) and a retracted position (D) where the arm member (10) is not prevented from returning to the bent position (A). A printed circuit board insertion/extraction mechanism comprising a three-piece stopper member that is rotatable. 2. The arm member (10) has a hook-shaped projection (17), and an engagement piece (30) is fixed on the printed circuit board,
When the printed circuit board is completely inserted into the shelf and the arm member (10) returns to the bent position (A), the hook-shaped projection (17) engages with the engagement piece (30) and the main body The printed circuit board insertion/extraction mechanism according to claim 1, wherein the member (1) is configured to be prevented from rotating.