JP2000173409A - Key switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key switch device for simultaneously turning on or off a plurality of microswitches. SOLUTION: A switch mounting main plate 2 is fixed to a rear part of a cylinder lock body, a plurality of microswitches 3 layered in the fore and aft direction are fixed by screws 5 to the switch mounting main plate 2 with a switch mounting sub-plate 4 abutting on them, a cam cylinder 6 for switch operation inserted between the switch mounting main plate 2 and the switch mounting sub-plate 4 is coupled to a rotor, and the plurality of microswitches are turned on/off by the cam cylinder 6 for switch operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key switch device comprising a combination of a cylinder lock and a micro switch, which is applied to operation management of various industrial devices.

[0002]

2. Description of the Related Art In a key switch device, a switch mounting plate is fixed to a cylinder-rear portion, and a plurality of micro switches are stacked and fixed on the switch mounting plate in the front-rear direction.
A required number of switch operation cams are laminated and fixed to the rear end of the rotor housed in the cylinder lock body. A predetermined key is inserted into the keyhole of the rotor and the pin tumbler lock mechanism is operated to release the constraint of the rotor on the cylinder lock body,
The micro switch is turned on or off by turning the rotor with the key.

In the key switch device, play present between the inner peripheral surface of the cylinder lock main body and the outer peripheral surface of the rotor is one of the causes of lowering the operation reliability. The displacement angle of the play to make the rotor rotatable is small in design, but is fixed to an extension of the rear end of the rotor having a certain length for the operation of the switch. On the cam, it will appear enlarged. For this reason, the relative positional relationship between the switch operating cam and the micro switch is deviated, and even if the rotor is turned by a predetermined angle, the actuator of the target micro switch or the actuator operating lever is not operated. A situation occurs in which a predetermined amount is not pressed. This tendency is more pronounced in the rear microswitch.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a key switch device which has a high operational reliability because a plurality of microswitches are simultaneously turned on or off when the rotor is turned by a predetermined angle. It is to provide.

[0005]

The key switch device according to the present invention will be described with reference to the accompanying drawings. A plurality of microswitches 3 are fixed to the switch mounting main plate 2 by screws 5 with the switch mounting sub-plate 4 abutting on the rear surface, and a single switch for turning on or off the plurality of microswitches 3 The switch operation cam cylinder 6 is housed between the switch mounting main plate 2 and the switch mounting sub-plate 4 and fixed by a rotor 7 screw 8 of a cylinder lock.

In the key switch device constructed as described above, when the key 10 is inserted into the keyhole 9 of the rotor 7 and the rotor 7 is turned in a predetermined direction by a predetermined angle, a plurality of micro switches are provided at the end of rotation. The switch 3 is simultaneously turned on or off by the switch operation cam cylinder 6.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, four microswitches 3 are stacked in a line in the front-rear direction and incorporated. A joint rod 11 is non-rotatably fitted and connected to the rear end of the rotor 7, the switch operation cam cylinder 6 is non-rotatably fitted to the joint rod 11, and the switch operation cam cylinder 6 is a screw 8. To the joint rod 11. The front and rear ends of the switch operation cam cylinder 6 are rotatably fitted into the guide receiving holes 13 of the switch mounting main plate 2 and the guide receiving holes 14 of the switch mounting sub-plate 4.

A fin-shaped protrusion 15 is provided on the outer peripheral surface of the switch operation cam cylinder 6 in the front-rear direction, so that the actuator operation levers 16 of the four micro switches 3 are simultaneously pressed. The cylinder lock body 1
The switch mounting main plate 2 is non-rotatably fitted into the oval cylindrical portion 17. When the operation screw 8 is turned to pull the slider 19 toward the screw head along the guide groove 21, the inclined cam surface 19 a of the slider 19 pushes the inclined cam surface 20 a of the clamp 20, so that the clamp 20 is inserted into the guide groove 21. Move radially along the flat side 1a of the cylinder lock body
Press. As a result, the switch mounting main plate 2 is tightened and fixed to the cylinder lock main body 1. The cam cylinder 6 for operating the switch can be directly fixed to the rotor 7 with screws of a long neck without using the joint rod 11.

A solenoid unit 12 is fixed to the switch mounting main plate 2, and its plunger 22 is urged forward by a compression coil spring 19.
A control plate 24 is fitted and fixed to the rear part of the rotor 7 in the radial direction. When the rotor 7 is in the locked position, the tip of the plunger 22 is in contact with the back of the control plate 24. When the rotor 7 is rotated 90 degrees by the key 10, the plunger 22, which has been released from the restraint by the control plate 24, advances, and the tip of the plunger 22 engages with the notch 25 on the left edge of the control plate 24. As a result, the reverse rotation of the rotor 7 is prevented, the switch operation cam cylinder 6 is accurately held at the ON / OFF position, and the controlled device is maintained in the operation continuation state or the operation stop state. To release this state, the solenoid unit 12 is energized, and the plunger 22 is retracted from the rotation locus of the control plate 24.

[0010]

As described above, in the key switch device of the present invention, a single switch operation cam cylinder 6 is positioned and arranged between the switch mounting main plate 2 and the switch mounting sub-plate 4 disposed in front and rear. Since the plurality of microswitches 3 are turned on or off by the switch operation cam cylinder 6 connected to the rear end of the rotor 7, the play is affected by the clearance between the cylinder lock body and the rotor. Instead, a plurality of microswitches are accurately operated at the same timing, and a highly reliable keyswitch device can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a key switch device according to an embodiment of the present invention.

FIG. 2 is a rear view of the key switch device.

FIG. 3 is a right side view of the key switch device.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a front view of a switch mounting main plate incorporated in the key switch device.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder lock main body 2 Switch mounting main plate 3 Micro switch 4 Switch mounting sub-plate 6 Cam surface for switch operation 7 Rotor 9 Keyhole 10 Key

Claims (1)

[Claims] 1. A switch mounting main plate 2 is fixed to a rear portion of a cylinder-lock body 1 and stacked in the front-rear direction, and a plurality of microswitches 3 are attached to a switch mounting sub-plate 4 on a rear surface thereof. A single switch operation cam cylinder 6 for fixing the plurality of microswitches 3 on or off is accommodated between the switch mounting main plate 2 and the switch mounting sub plate 4 and fixed to the cylinder lock. Key switch device fixed to the rotor 7 by screws 8.