JPH10207306A - Switch protection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the terminal of a switch from being damaged because it is excessively pushed in by providing the switch with a regulation member regulating the push-in amount of the terminal of the switch. SOLUTION: The switch is fixed on the inside of an equipment being as a first member and a pressing member 7 is fixed to a door being as a second member. Then, the regulation member 10 regulating the push-in amount is fitted to the switch 1 in order to prevent the terminal 1a of the switch 1 from being excessively pushed in when the door is closed. The push-in amount A can be optionally set to be such amount that the switch 1 can be turned on and off and the switch 1 is not damaged. However, it is preferable that the amount A is set within the stroke of the terminal 1a. Thus, since excessive force is not imposed on the switch 1, the safety device mechanism of the equipment is prevented from being damaged. In such a case, it is also good that the regulation member 10 is arranged at a position separated from the switch 1. However, when it is integrally arranged with the switch 1, the error of a fitting position is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch used to detect the opening and closing of a door of equipment, and more particularly to a protection structure for protecting the switch from damage.

[0002]

2. Description of the Related Art Some doors are provided in equipment, for example, a copying machine, for maintenance and jam clearance. In the event of a paper jam or malfunction, open an appropriate object from these doors to remove jammed paper,
Perform repair work, close the door and resume copying. When resuming copying, if the opened door is not completely closed, another trouble may occur. Therefore, a door switch is provided so that the vehicle cannot be operated unless the door is completely closed.

FIG. 4 shows an example of such a door switch conventionally used. In FIG.
Is fixed to the bracket 2, and screws or the like are inserted through mounting holes 2a at both ends of the bracket 2 to be fixed to a body of a copying machine (not shown). The terminal 1a of the switch 1 penetrates the bracket 2 and protrudes to the opposite side. Reference numeral 3 denotes an electric wire connected to the switch 1.

The bracket 1 has a pair of projecting pieces 4, 4 between which one end of a flat plate-shaped arm 5 is rotatably supported. Is turned on and off.

The switch 1 is covered with a cover 6, and an opening 6a is opened at a position corresponding to the tip of the arm 5 of the cover 6. A pressing member 7 is fixed to a door (not shown), and when the door is closed, the pressing member 7
a, the arm 5 is pushed, and the switch 1 is turned on.

[0006]

By the way, the structure of the door switch as described above is based on the mounting position of the pressing member 7,
Errors tend to occur in the length of the pressing member in the moving direction, the distance between the position where the arm 5 contacts the pressing member 7 and the rotation axis, the mounting position of the switch 1, and the like, and these errors are accumulated. . Therefore, the case where a large force is applied to the door switch every time the door is opened and closed increases. In order to prevent this, the mounting positions of the door switch, the pressing member, and the like must be accurately set, and there is a problem that the mounting requires skill and a long time.

The present invention has been made to solve the above problem. In a switch for detecting opening and closing of a door and the like, even if there is a slight mounting error, the switch operates and excessive force is applied to the switch. It is intended to propose a switch protection structure that prevents it from being added.

[0008]

In order to achieve the above object, a switch protection structure according to the present invention comprises a first member and a second member which approach and separate from each other, and the first member and the second member.
A switch attached to one of the members, a pressing member attached to the other of the first member and the second member for turning on and off the switch, and a close distance between the switch and the pressing member being a predetermined distance or less. And a restricting member for preventing the occurrence of stagnation. It is desirable that the regulating member be integrated with the switch.

[0009] Alternatively, a first member and a second member approaching and separating from each other, a switch attached to one of the first member and the second member, and one of the first member and the second member. A pressing member attached to the other side for pressing the terminal of the switch, a case for holding the switch so as to be able to advance and retreat in the pressing direction of the pressing member, and elastic means for urging the switch in the case toward the pressing member And a configuration having:

Further, a regulating member may be provided for preventing the approach distance between the switch and the pressing member from becoming less than a predetermined value. This restricting member preferably has a structure integral with the switch.

A locking claw is formed on the switch, and a check claw is formed on the inner surface of the case to engage with the locking claw. The engagement of these allows the switch to freely move in the pushing direction. , The movement in the reverse direction can be restricted.

One of the first member and the second member may be a device, the other may be a door thereof, and the switch may be a door opening / closing detecting means for detecting opening / closing of the door. It is.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of the present invention. FIG. 3A shows a state where the door is open, and FIG. 3B shows a state where the door is closed. The switch 1 is fixed inside equipment as a first member, and the pressing member 7 is fixed to a door as a second member. In the present invention, when the door is closed as shown in (b), a regulating member 10 for regulating the amount of pushing is attached to the switch 1 in order to prevent the terminal 1a of the switch 1 from being pushed excessively. ing.

The pushing amount A can be arbitrarily set so that the switch can be turned on and off and the switch 1 is not damaged. However, it is desirable that the pushing amount A be set within the stroke of the terminal 1a. With such a configuration, since an excessive force does not act on the switch 1, damage to the safety device mechanism of the equipment can be prevented. The regulating member 10 may be provided at a position separate from the switch 1, but if it is provided integrally with the switch 1 as shown in the figure, an error in the mounting position does not matter.

FIG. 2 shows a second embodiment of the present invention. Although not particularly shown, the pressing member 7 is the same as the embodiment of FIG.
In this embodiment, the switch 11 is housed in the case 12 so as to be movable in the direction of pushing the terminal 11a.
The switch 11 has a flange 11b at the lower end thereof. The flange 11b does not catch on the bent edge 12a formed at the entrance of the case 12, so that the switch does not jump out of the case 12.
Elastic means 13 composed of a coil spring is fitted between the lower surface of the switch and the bottom surface of the case.
Is always urged in a direction away from the bottom surface of the case 12.

With the above configuration, when the door shown in FIG. 2A shifts from the open state to the closed state shown in FIG. 2B, the lever 5 rotates and the terminal 11a is pushed. If the mounting position of the door is not accurate and the lever 5 abuts on the regulating member 10 and continues to press the regulating member 10 with excessive force, the switch 11 moves in the direction of compressing the spring 13. . (B) is shown by a virtual line in (a).
It is the position of the state. B in the drawing is the pushing amount in this case. In the case of this embodiment, a large pushing amount B
Therefore, the mounting accuracy can be made rough, and the mounting work of the switch and the like can be simplified.

FIG. 3 shows a third embodiment of the present invention. In this embodiment, the switch 15 is accommodated in the case 14. Locking claws 15 c, 15 c are formed on both lower ends of the switch 15, and the locking claws 15 c, 1 are formed on the inner surface of the case 14.
A serrated check claw 14a meshing with 5c is formed. The elastic means 13 is fitted between the bottom of the case 14 and the bottom of the switch 15.

FIG. 3 (a) shows an initial state in which it is mounted. When the door is closed from this state, the state shown in FIG. That is, the arm 5 contacts the tip of the regulating member 10, the terminal 15a is pushed in, and the switch 15 is switched. Since the pushing amount C at this time is large, the switch 15 is pushed into the case 14 against the force of the elastic means 13, and the locking claw 15c engages with the adjacent non-return claw 14a. Thereafter, even if the force applied to the arm 5 is removed, the locking claw 15c of the switch 15 and the check claw 14a of the case 14 are removed.
And keep the position. Then, when the door is closed next, the locking claw 15c and the check claw 14a remain at the meshing position of (b), and the arm 5 rotates as shown in (c), and the switch 15 is turned on. The switch 15 is switched, and an appropriate depression amount D of the switch 15 can be obtained.

[0019]

According to the present invention as described above,
Since the regulating member that regulates the pushing amount of the terminal of the switch is provided, it is possible to prevent the terminal of the switch from being pushed too much and damaged. If the regulating member is formed integrally with the switch, it is not necessary to align the switch with the regulating member.

If the switch is housed in a case which holds the switch so as to be able to advance and retreat in the pushing direction of the pressing member, and elastic means for urging the switch toward the pressing member is provided,
Even if an excessive force acts on the switch, the switch can escape in the pushing direction, and damage to the safety device mechanism of the device can be prevented. Also, since the pushing amount can be increased, there is no problem even if the mounting positions of the switch and the pressing member are slightly shifted, and the mounting operation is simplified.

A locking claw is formed on the switch, and a check claw is formed on the inner surface of the case so as to engage with the locking claw. If the movement in the reverse direction is restricted, even if there is a variation in the position between the parts, an appropriate pushed-in position of the switch is obtained and the position is maintained,
An appropriate pushing amount can be secured. Even if the mounting position of the switch or the like is slightly deviated, it does not affect the operation of the switch, and the mounting work becomes easy.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of a switch protection structure according to the present invention;
(A) is a state where the terminal of the switch is not pressed, (b)
Indicates a pressed state.

FIGS. 2A and 2B are views showing a main part of another embodiment of the switch protection structure of the present invention, wherein FIG. 2A shows a state in which a switch terminal is not pressed, and FIG. 2B shows a pressed state.

FIGS. 3A and 3B are diagrams showing a main part of another embodiment of the switch protection structure of the present invention, wherein FIG. 3A is an initial state, FIG. 3B is a state where a switch is pressed, and FIG. Shows a state where it has been moved to an appropriate position.

FIG. 4 is a perspective view showing the structure of a conventional door switch.

[Explanation of symbols]

 1, 11, 15 Switch 7 Pressing member 10 Restricting member 12, 14 Case 13 Elastic member 14a Non-return claw 15c Locking claw

Claims (7)

[Claims] A first member and a second member which approach and move away from each other;
A member, a switch attached to one of the first member and the second member, a pressing member attached to the other of the first member and the second member to turn on and off the switch, A switch protection structure comprising: a regulating member configured to prevent an approach distance between the pressing member and the pressing member from becoming smaller than a predetermined value. 2. The switch protection structure according to claim 1, wherein the regulating member is provided integrally with the switch. 3. A first member and a second member which approach and move away from each other.
A member, a switch attached to one of the first member and the second member, a pressing member attached to the other of the first member and the second member to press a terminal of the switch, and the switch A switch protection structure, comprising: a case for holding the switch in the direction in which the pressing member is pushed back and forth; and elastic means for urging a switch in the case toward the pressing member. 4. The switch protection structure according to claim 3, further comprising a regulating member for preventing an approach distance between the switch and the pressing member from becoming less than a predetermined distance. 5. A locking claw is formed on the switch, and a non-return claw is formed on the inner surface of the case so as to engage with the locking claw. 5. The switch protection structure according to claim 3, wherein the switch protection structure is free and movement in the reverse direction is restricted. 6. The switch protection structure according to claim 4, wherein the regulating member is provided integrally with the switch. 7. One of the first member and the second member is a device, and the other is a door thereof, and the switch is a door opening / closing detecting means for detecting opening / closing of the door. The switch protection structure according to any one of claims 1 to 6.