JPH0344934Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application The invention relates to a key switch used in computers, registers, OA terminals, etc., and more specifically, relates to a locking structure for the inner cylinder of a cylinder lock in a key switch. .

B. Prior Art Conventionally, a structure for preventing the inner cylinder of a cylinder lock from being removed from a key switch has been as shown in FIGS. 4 and 5. That is, in FIG. 4, 40 is an outer cylinder, 41 is an inner cylinder, and the rear end of the inner cylinder 41 is engaged with the inner periphery of the outer cylinder 40 to provide a moderating effect. A rotor 42 for controlling the opening and closing of a switch disposed in the rotor 42 is fixed by a screw 43. Since the rotor 42 is larger in diameter than the inner cylinder 41, the rotor 42 is attached to the circumferential protrusion 4 of the outer cylinder 40.
4 and cannot be removed.

In addition, the key switch illustrated in FIG.
A spring housing hole 52 is provided on the side of the outer cylinder 50 , and an E-ring 54 is mounted therein while being biased outwardly by a coil spring 53 .
This is to prevent the inner cylinder 51 from slipping out by being engaged with the circumferential protrusion 55 of the inner cylinder 51.

Although not shown, the switch shown in FIG. 5 is also provided with a rotor that takes charge of the moderation function, like the switch shown in FIG. 4.

C. Problems to be Solved by the Invention However, the above-mentioned conventional key switch had problems such as a large number of parts used, a large number of assembly steps, and a time-consuming assembly process.

This invention solves the conventional problems,
Reduces the number of parts and assembly man-hours,
It is an object of the present invention to provide a structure for preventing the inner cylinder of a cylinder lock from coming off in a key switch, which is also easy to assemble.

D. Means for Solving the Problems The configuration for achieving the above object will be explained with reference to FIGS. 1 to 3, which correspond to embodiments of the present invention.

In the key switch of the present invention, the inner cylinder of the cylinder lock has a locking structure in which the inner cylinder 10 of the cylinder lock has a fitting part with a smaller diameter at the rear part of the tumbler accommodating part 11. A plurality of arm parts 17, 12 are provided along the fitting part 12 from the rear end of the tumbler accommodating part 11, and with gaps 16, 16 in between.
17, and locking claws 18, 18 are provided at the ends of these arm parts 17, 17, and a rotor 20 is provided with a moderation effect by being attached to the inner cylinder 10 and engaging with the outer cylinder 1 of the cylinder lock. , protrusions 22, 22 are provided corresponding to the gaps 16, 16 of the inner cylinder 10, and the inner cylinder 10 is inserted into the outer cylinder 1, and the locking claws 18, 18 of the inner cylinder 10 are attached to the outer cylinder. 1. A rotor 20 is engaged with a circumferential protrusion 6 on the inner periphery, a rotor 20 is fitted into a fitting part 12 of an inner cylinder 10, and protrusions 22, 22 are fitted into gaps 16, 16. It is.

E. Effect Arm parts 17, 17 are provided in the inner cylinder 10, and the arm parts 17,
By providing locking claws 18, 18 at the tip of 17,
Due to the elasticity of the arm parts 17, 17, the locking claws 18, 18 do not become an obstacle when inserted into the outer cylinder 1, and the inner cylinder 10
When it reaches a predetermined position inside the outer cylinder 1, the locking claws 18,
18 opens outward and is locked to the circumferential protrusion 6 of the outer cylinder 1. Then, the projecting pieces 22, 22 of the rotor 20 that fit into the inner cylinder 10 are inserted into the gaps 16, 16 formed between the arm parts 17, 17 of the inner cylinder 10 and the fitting part 12.
When the arm parts 17, 17 are fitted into the inner cylinder 10, the elasticity of the arms 17, 17 is lost, and the locking claws 18, 18 do not bend in the direction (inward) in which the locking claws 18, 18 are released from the circumferential protrusion 6.
is securely positioned and fixed within the outer cylinder 1 so as to be rotatable only in the circumferential direction. After fixing, arm 1
7 and 17 are reinforced by the projecting pieces 22 and 22, and reliable locking is maintained.

In the present invention, when configuring the retaining structure for the inner cylinder 10, the inner cylinder 10 is
By integrally providing the arm portions 17, 17 and the locking claws 18, 18 on the rotor 20, and integrally providing the projecting pieces 22, 22 on the rotor 20, it is possible to eliminate the need for conventional screws, rings, springs, etc. It can be constructed by simply modifying the structure of the key switch's basic components without using any separate parts.

There is no need for time-consuming assembly using separate parts as in the past, and the inner cylinder 1 is simply inserted into the outer cylinder 1.
0, and the rotor 20 is inserted from the opposite side and fitted into the inner cylinder 10 for assembly.

F. Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical sectional side view of a key switch according to an embodiment of the present invention, and FIGS. 2 a, b, and c are side, top, and bottom views of the inner cylinder of the cylinder lock of the key switch in FIG. 1. 3a, b, and c show a side view, a top view, and a bottom view of the rotor constituting the key switch of FIG. 1.

In these figures, 1 is the outer cylinder of the cylinder lock, 10
2 is an inner cylinder of the cylinder lock, 20 is a rotor, and 30 is a switch portion.

The outer cylinder 1, the inner cylinder 10, and the rotor 20 are molded from a resin material, and the front end of the outer cylinder 1 is provided with a flange 2, and inside the flange 2 there is a large diameter front end of the inner cylinder 10. A recess 3 is formed in which the part 13 is placed, and a male threaded part 4 is formed on the outer periphery near the collar part 2, into which a mounting nut 5 is screwed. Further, a circumferential protrusion 6 is provided at the center of the inner circumference of the outer cylinder 1, and a vertical groove 7, in which a tumbler to be installed in the inner cylinder 10 is fitted, is provided on the inner circumference closer to the front end than the circumferential protrusion 6. 7 is formed, and the following rotor 2 is formed on the inner periphery closer to the rear end than the circumferential protrusion 6.
A vertical groove-shaped recess (not shown) is formed which constitutes a moderation mechanism in combination with 0.

In addition, the inner cylinder 10 is provided with a fitting part 12 at the rear of the tumbler accommodating part 11, and a large diameter part 13 is provided at the front end of the tumbler accommodating part 11 that accommodates a plurality of tumblers 9. 13 and the tumbler accommodating portion 11 are provided with a key insertion hole 14 in the axial direction. Further, a switch operation section 15 is provided at the rear end of the fitting section 12.

The fitting part 12 is for fitting a rotor 20 described below, and has a smaller diameter than the tumbler housing part 11 and an irregular cross-sectional shape.

The inner cylinder 10 includes a tumbler housing section 11.
Along the fitting part 12 from the rear end and the gap part 1
A plurality of arm portions 17, 17 are provided at intervals 6, 16, and locking claws 18, 18 are provided at the tips of these arm portions 17, 17 to protrude toward the outer periphery.

When the inner cylinder 10 is inserted from the front end side of the outer cylinder 1 after the tumbler 9 is attached to the tumbler accommodating part 11 by biasing it with the spring 8, the inner cylinder 10 is bent inward part way through insertion at a predetermined insertion position. The arms 17, 17 that had been locked open outward and the locking claws 18, 18
engages with the circumferential protrusion 6 of the outer cylinder 1.

Note that the locking claws 18, 18 are formed with sharp tips so that they do not get caught during insertion.

In this way, the inner cylinder 10 is locked in the outer cylinder 1 at the front and back by the large diameter portion 13 and the locking claws 18, 18, so that it cannot move in the axial direction and can only rotate.

Further, the rotor 20 has a circular outer periphery, an irregularly shaped hole 21 is bored in the center, and protruding pieces 22, 22 are provided at the upper end corresponding to the gaps 16, 16 of the inner cylinder 10. 2 are convex portions 23 and 2 that fit into concave portions (not shown) of the outer cylinder 1 to constitute a moderation mechanism.
3 is provided. This rotor 20 is inserted from the rear end of the outer cylinder 1, and its irregularly shaped hole 21 is fitted into the fitting part 12 of the inner cylinder 10, and the protruding pieces 22, 22 are inserted into the gap of the inner cylinder 10. 16, 16, the rotor 20 is integrated with the inner cylinder 10 and the outer cylinder 1
It is rotatable inside and provides a moderation effect. Then, by fitting the projecting pieces 22, 22 into the gaps 16, 16, the arm parts 17, 17 are fixed, and the positions of the locking claws 18, 18 are fixed.

Reference numeral 30 designates a switch portion, and the switch operation portion 15 provided at the rear end of the inner cylinder 10 is formed with support grooves 15a, 15a for the contact rod 31 and a spring housing hole 15b. The contact rod 31 is disposed while being biased by a spring 15c.

Terminals 33 and 33 are fixed to a substrate 32 disposed at the rear end of the outer cylinder 1 and are connected to and disconnected from the contact rod 31.

In the above embodiment, the switch operation section 15 is provided at the rear end of the inner cylinder 10 to enable the switch operation, but it is also possible to provide the switch operation section on the rotor 20 without providing the switch operation section on the inner cylinder 10. Alternatively, a separate switch operating member may be provided and linked to the rotor 20.

G. Effects of the invention As stated above, the locking structure for the inner cylinder of the cylinder lock in the key switch of the invention reduces the number of parts and reduces the number of assembly steps by configuring it as claimed in the utility model registration claim. It is now easier to assemble.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view of a key switch according to an embodiment of the present invention, and FIGS. 2 a, b, and c are side, top, and bottom views of the inner cylinder of the cylinder lock of the key switch in FIG. 1. 3a, b, and c show a side view, a top view, and a bottom view of the rotor constituting the key switch of FIG. 1. 4 and 5 are partially cutaway side views of a conventional key switch. 1... Outer cylinder, 6... Circumferential protrusion, 10... Inner cylinder,
11... Tumbler housing part, 12... Fitting part, 1
6... Gap part, 17... Arm part, 18... Locking claw,
20...Rotor, 22...Protruding piece portion.

Claims (1)

[Scope of utility model registration request] In a key switch formed by combining a cylinder lock and a switch, the inner cylinder of the cylinder lock is provided with a fitting part with a smaller diameter at the rear part of the tumbler housing part, and the inner cylinder of the cylinder lock is provided with a fitting part with a smaller diameter at the rear part of the tumbler housing part. By providing a plurality of arms along the fitting part and with gaps, and providing locking claws at the tips of these arms, which are attached to the inner cylinder and engaged with the outer cylinder of the cylinder lock. The rotor to have a moderation effect is provided with a projecting piece corresponding to the gap of the inner cylinder, and the inner cylinder is inserted into the outer cylinder, and the locking claw of the inner cylinder is connected to the inner circumference of the outer cylinder. The inner part of a cylinder lock in a key switch is configured such that the rotor is engaged with a circumferential protrusion, the rotor is fitted into a fitting part of an inner cylinder, and the protrusion piece is fitted into a gap. Structure that prevents the tube from falling out.