JP2503983Y2 - Plug-in circuit board extraction mechanism and tool - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in circuit board withdrawal mechanism and tool, and more particularly to a withdrawal mechanism and tool for easily withdrawing a circuit board coupled to a connector integrated with a housing.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional plug-in type circuit board 11. The circuit board 11 that is inserted into the housing 10 has a plug 11a (FIG. 4) integrally formed with the inner edge 11c (FIG. 4C).
The circuit board 11 is detachably held in the housing 11 by coupling the connector 12 fixed to the back of the housing 10 and the plug 11a. Plug with connector 12 to ensure electrical and mechanical coupling
The grip of 11a is made firm so that the circuit board 11 does not easily drop from the housing 10. In order to pull out the circuit board 11 held in the housing 10, the pin 13a attached to the tip of the extraction tool 13 having the handle 14 is inserted into the drawing hole 11b of the circuit board 11 and the rear handle 14 of the housing 10 is pulled out. Pull outwards.

[0003]

[Problems to be Solved by the Invention] In the conventional structure of FIG.
Since the grip of the plug 11a by the connector 12 is strong,
When pulling out the circuit board 11, a considerably large force is required, and when the pulled-out circuit board 11 is splashed or unfamiliar, the extraction tool 13 is disengaged from the circuit board 11 to remove the circuit board 11 or the housing 10. There was inconvenience such as damage.

Further, in order to disperse the pulling force directly applied from the handle 14 to the circuit board 11 to the whole of the plug 11a and avoid the concentration of strain on a part of the circuit board 11, the pulling hole 11b is formed on the circuit board 11. The front end edge 11d (FIG. 4 (A)) is formed substantially at the center. For this reason, the light emitting diode (LED) and other display elements, and accessory devices 15 (Fig. 1) such as adjusting screws are attached to the circuit board.
11 There is also the inconvenience of having to leave the central part open when installing it on the front edge of the upper part. Therefore, it is an object of the present invention to provide a pull-out mechanism and a tool for a plug-in type circuit board which can be easily pulled out.

Referring to the embodiment of FIG. 1, a plug-in type circuit board withdrawal mechanism according to the present invention is provided with a connector 12 fixed at the back of a housing 10 at a rear side edge 11c (FIG. 4C). In the mechanism for pulling out the circuit board 11 inserted into the housing 10 so as to be coupled from the housing 10, a pull-out hole 11b is formed at one end of the circuit board 11 on the front side edge 11d (FIG. 4C) in the vertical direction. , A pivot shaft 3 at one end of the lever member 2
Is provided, and a hook member 4 that can be fitted to the front end edge portion 10a of the housing 10 is pivotally supported by its pivot shaft 3, and an intermediate portion between the other end of the lever member and the pivot shaft 3 on the lever member 2. The action shaft 5 is provided on the
The action shaft 5 is fitted into the round hole at one end of the claw 6 to pivotally support the claw 6 ,
At the free end of the claw 6, a pin 6a that fits into the extraction hole 11b of the circuit board 11 is attached.

Referring to the embodiment of FIGS. 1 and 3, a pulling tool 1 according to the present invention includes a pivot member 3 at one end of a lever member 2.
Is provided to pivotally support a hook member 4 which can be fitted to the front end edge portion 10a of the housing 10 on a pivot shaft 3, and is provided at an intermediate portion between the other end of the lever member on the lever member 2 and the pivot shaft 3. The action shaft 5 is provided, and the action shaft 5
Is inserted into a round hole at one end of the claw 6 to pivotally support the claw 6 , and the claw 6
The pin 6a which can be freely inserted into the extraction hole 11b of the circuit board 10 is attached to the free end of the.

[0007]

The operation will be described with reference to the embodiment shown in FIG. 1. In the mechanism for pulling out the plug-in circuit board 11 of the present invention, the circuit board 11 is used.
Since the pull-out hole 11b is formed at one end in the vertical direction of the front end edge 11d, it is not necessary to open the central portion when attaching the accessory 15 on the front end edge 11d, and the accessory can be efficiently arranged. be able to.

The operation of the extraction tool 1 will be described with reference to FIGS. 4 (A) to 4 (C). In order to pull out the circuit board 11 inserted in the casing 10, first, the hook member 4 of the pulling tool 1 is fitted to the front end edge portion 10a of the casing 10 to determine the position of the pivot shaft 3, and Insert the pin 6a into the extraction hole 11b of the circuit board 11 to be extracted. Alternatively, after inserting the pin 6a into the extraction hole 11b, the hook member 4 is attached to the housing 1
The position of the pivot shaft 3 may be determined by fitting the front end edge portion 10a of 0. In this state, when the force f in the direction away from the housing 10 is applied to the free end of the lever member 2 as shown in FIG. 4 (A), the force F amplified by the lever member 2 is passed through the action shaft 5 and the pin 6a. And acts on the extraction hole 11b of the circuit board 11. If the distance from the point of action of the rotational force f to the lever member 2 to the pivot shaft 3 is L, and the distance from the action shaft 5 to the pivot shaft 3 is D, the force f and the force F are as follows: I have a relationship.

[0009]

## EQU1 ## F = f (L / D)

The plug 11a of the circuit board 11 is pulled out of the connector 12 of the housing 10 by the force F applied from the pin 6a in response to the rotation of the lever member 2 around the pivot shaft 3, as shown in FIG. 4 (B). start. According to the experiment, as shown in the figure, at this time, the upper part of the front edge of the circuit board 11 slightly rises,
Since the action shaft 5 is separated from the pin 6a, that is, the pull-out hole 11b, to the outside of the housing 10, its rise is within a range that does not hinder the housing 10 and the circuit board 11 at all. In the process in which the lever member 2 further rotates to a substantially horizontal position as shown in FIG. 4C, the outward force and the downward force of the housing 10 act on the circuit board 11, so that the circuit board 11 is housed. It is gradually pulled out along the bottom of the body 10 and completely separated from the connector 12. After that, the circuit board 11 remains stationary while being held by the extraction tool 1, so there is no possibility of jumping. By removing the pin 6a from the pull-out hole 11b of the rotary plate 11 and removing the hook member 4 from the front end edge portion 10a of the housing 10, the pull-out tool 1 can be separated, and the circuit board 11 can be taken out from the housing 10 by hand. it can.

In this way, it is possible to achieve the object of the present invention, "to provide a pull-out mechanism and a tool for a plug-in type circuit board which can be easily pulled out".

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the extraction tool 1 of the embodiment shown in FIG. 3, the lever member 2 has a flat plate shape, but it may have an appropriate shape such as a tubular shape, and a gripping portion may be appropriately provided. The hook member 4 is provided with a hook groove 4a so that the bent portion of the front end edge portion 10a of the housing 10 and the hook groove 4a are fitted to each other. However, the hook member 4 of the present invention has a front edge portion of the housing. The hook groove 4a is not always necessary as long as it can be fitted with the hook 10a. Hook member 4
In order to limit the rotation of the lever member 2 with respect to the lever, the stopper 8a
The hook member 4 may be shaped like a cam that cooperates with the stopper 8a. Further, in order to limit the swinging of the claw 6 to a range necessary for pulling out the circuit board 11, the claw 6 may be provided with a guide groove 7 and the lever member 2 may be provided with a stopper 8b cooperating therewith.

[0013]

As described in detail above, the plug-in circuit board withdrawal mechanism and tool according to the present invention uses one withdrawal hole formed at one end in the vertical direction of the front edge of the circuit board. Since the pulling tool is provided with a claw with a pin pivotally supported by the working shaft, and the pin is inserted into the pulling hole of the circuit board to perform the pulling operation, the following remarkable effects are obtained.

(B) The plug-in circuit board can be easily pulled out with a relatively small force. (B) It is possible to safely pull out the plug-in type circuit board and prevent inconveniences such as its splashing. (C) It is possible to prevent an unreasonable force from being exerted on the circuit board when the plug-in type circuit board is pulled out, and to prevent the damage. (D) It is possible to prevent unreasonable force from acting on the housing when pulling out the plug-in type circuit board and prevent damage to the housing. (E) It is possible to efficiently attach accessories such as LEDs over the entire length of the front edge of the plug-in type circuit board.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment of the present invention.

FIG. 2 is a perspective view of a conventional example.

FIG. 3 is a perspective view of a drawing tool.

FIG. 4 is an explanatory diagram of an operation.

[Explanation of symbols]

 1 Extraction tool 2 Lever member 3 Pivot shaft 4 Hook member 5 Working shaft 6 Claw 7 Guide grooves 8a, 8b Stopper 10 Housing 11 Circuit board 12 Connector 14 Handle 15 Attached device.

Claims (2)

(57) [Scope of utility model registration request] 1. A device for pulling out from a housing a circuit board inserted into the housing so as to be coupled to a connector fixed to the inside of the housing at a rear side edge, in a vertical direction of a front side edge of the circuit board. A pulling hole is formed at one end, a pivot shaft is provided at one end of the lever member, and a hook member that can be fitted to the front end edge portion of the housing is pivotally supported by the pivot shaft of the lever member. An action shaft is provided at an intermediate portion between the other end of the lever member and the pivot shaft, and the action shaft is attached to the claw.
A plug-in circuit board withdrawal mechanism in which a pin is inserted into a round hole at one end to pivotally support the pawl, and a pin which is fitted into a withdrawal hole in the circuit board is attached to a free end of the pawl. 2. A tool for pulling out a circuit board with a pull-out hole inserted into a housing, wherein a pivot shaft is fixed to one end of a lever member, and a hook member which can be fitted to a front end edge portion of the housing is provided. and pivotally supported on the pivot shaft, wherein the lever member and the other end of the lever member and provided operating shaft in an intermediate portion between the pivot shaft, the operating shaft of one end of the pawl round
An extraction tool , which is inserted into a hole to pivotally support the pawl, and a free end of the pawl is attached with a pin that can be inserted into an extraction hole of a circuit board.