JPH1168356A - Structure for preventing extraction of substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the dysfunction of parts mounted on a substrate which occurs when the substrate is erroneously inserted or extracted when power supply is made. SOLUTION: In a structure for preventing extraction of substrate used for a card rack for housing a plurality of printed board 1 having a plurality of recessed sections which are put on connectors 15 provided on a back board 2, a solenoid 7 which moves upward when the power supply is turned on, a lever 8 which is attached to the solenoid 7 with pins 6 and pressed down by means of a coil spring 5, and a stay 9 which is attached to the lever 8 and inserted into the recessed sections 3 of the substrates 1 when the solenoid 7 operates are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a substrate from being pulled out, and more particularly to a structure for preventing a printed circuit board from being pulled out when power is supplied.

[0002]

2. Description of the Related Art Generally, in a card rack accommodating a plurality of boards, the boards can be freely attached and detached. Therefore, even when power is supplied to the card rack, the boards can be attached and detached. The attachment and detachment may destroy the electric circuit on the board. In view of the above, a structure has been considered in which the board cannot be attached or detached when power is supplied to the card rack (for example, see Japanese Patent Application Laid-Open No. Sho 62-62).
249500).

[0003] A conventional substrate pull-out preventing structure will be described in detail with reference to the drawings.

FIGS. 3 (a) to 3 (d) are a perspective view and a partial side view showing an example of the related art. The board pull-out prevention structure shown in FIG. 1A includes a stopper 13 provided with slits 12 at the same interval as the mounting interval of the printed circuit board 1, and a stopper 1.
3 and a rotary solenoid 14 for rotating the rotary member 3.

FIG. 1B shows the position of the slit 12 when the rotary solenoid 14 does not operate. At this time, the surface of the slit 12 is parallel to the direction in which the printed board 1 is taken out. 1 can be pulled out to the front.

FIG. 1C shows the position of the slit 12 when the rotary solenoid 14 is operated. Since the stopper 13 is rotated by the rotary solenoid 14, the surface of the slit 12 is perpendicular to the direction in which the printed circuit board 1 is taken out. Therefore, the printed circuit board 1 cannot be pulled out.

FIG. 1D is a view showing a rotation margin (rotation movable area) for realizing the operation of the stopper 13. The stopper 13 is provided between the printed board 1 and the stopper 13.
Therefore, the printed board 1 may physically move by a distance corresponding to the gap L even when power is supplied (during energization).

[0008]

In the above-mentioned conventional structure for preventing the board from being pulled out, the printed board may physically move by a distance corresponding to the gap L even when power is supplied. If you move,
There is a drawback that the connection between the printed board and the connector provided on the backboard becomes unstable, and there is a risk of causing a functional failure.

[0009]

According to a first aspect of the present invention, there is provided a board pull-out preventing structure for a card rack accommodating a plurality of printed boards having concave portions inserted into a plurality of connectors provided on a backboard. A solenoid that moves upward when the power is turned on, a lever that is attached to the solenoid by a pin and pressed downward by a coil spring, and a lever that is attached to the lever and operates when the solenoid operates. And a stay inserted into the recess.

According to a second aspect of the present invention, in the first aspect, when the power supplied to the printed circuit board is turned on, power is supplied to a solenoid that moves linearly. The substrate pull-out prevention structure described in the above.

[0011]

Next, the present invention will be described in detail with reference to the drawings.

FIGS. 1A to 1C are a perspective view, a side view and a partial sectional view showing an embodiment of the present invention. FIG.
The board pull-out preventing structures shown in (a) to (c) are the board pull-out preventing structures of a card rack that accommodates a plurality of printed circuit boards 1 each having a recess 3 inserted into a plurality of connectors 15 provided on a backboard 2. A solenoid 7 which operates upward when the power is turned on, a lever 8 which is attached to the solenoid 7 by a pin 6 and pressed downward by a coil spring 5, and a printed circuit board which is attached to the lever 8 and which operates when the solenoid 7 operates. And a stay 9 inserted into the one concave portion 3.

FIGS. 2A and 2B are side views showing an example of use of the present invention. FIG. 2A shows a case where the power is not turned on. Since the stay 9 is pressed downward by the force of the coil spring 5, the printed board 1 can be freely inserted and removed. FIG. 2B shows a case in which the power is turned on. The solenoid 9 operates, the stay 9 is pulled up, and the stay 9 is inserted into the concave portion 3 of the printed board 1, so that the printed board 1 cannot be inserted or removed. .

When the power supplied to the printed circuit board 1 is turned on, wiring is performed so that power is also supplied to the solenoid 7 that moves linearly, and a state as shown in FIG. Can be.

[0015]

According to the structure for preventing the board from being pulled out according to the present invention, the gap between the stopper and the printed board can be eliminated by using a linearly operated solenoid instead of the rotary solenoid. There is an effect that it is possible to prevent a functional failure of the board mounted component that occurs when an erroneous insertion and removal is attempted.

[Brief description of the drawings]

FIGS. 1A to 1C are a perspective view, a side view, and a partial sectional view showing an embodiment of the present invention.

FIGS. 2A and 2B are side views showing one usage example of the present invention.

3 (a) to 3 (d) are a perspective view and a partial side view showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 3 Concave part 6 Pin 7 Solenoid 8 Lever 9 Stay 15 Connector

Claims (2)

[Claims] 1. A board pull-out prevention structure for a card rack accommodating a plurality of printed circuit boards having recesses to be inserted into a plurality of connectors provided on a backboard, wherein a solenoid which operates upward when power is turned on is provided. A board attached to the solenoid by a pin and pressed downward by a coil spring; and a stay attached to the lever and inserted into the recess of the printed board when the solenoid operates. Pull-out prevention structure. 2. The board pull-out prevention structure according to claim 1, wherein when the power supplied to the printed circuit board is turned on, the power is supplied to a solenoid that moves linearly.