JP2004278015A - Click mechanism of cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structurally simple click mechanism which can be applied even to a small cylinder lock. <P>SOLUTION: A stepped part is formed by reducing a diameter of a front-end opening of an outer cylinder 1 of the cylinder lock; an inner cylinder is separated into a key guide 3 at a front end and a tumbler supporting part 4; a small-diameter part to be fitted into a diameter-reduced part of the outer cylinder and a large-diameter part equal in diameter to the tumbler supporting part are formed in the key guide; at least one click protrusion is protrusively provided on the front-end surface of the large-diameter part of the key guide; a click recess is formed in the stepped part of the outer cylinder, which is brought into sliding contact with the front-end surface of the large-diameter part of the key guide; and the key guide 3 is urged forward by a wave washer 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a click mechanism for a cylinder lock (hereinafter simply referred to as a click mechanism), and more particularly to a click mechanism that can be applied to a small cylinder lock and has a simple structure.
[0002]
[Prior art]
When the cylinder lock is locked and unlocked with a duplicate key, when the click device is operated at the locking angle position of the inner cylinder or at the unlocking angle position to sense an operating feeling of a click, a reliable operation feeling is obtained and the usability is good.
[0003]
On the other hand, there are various types of cylinder locks such as a lever tumbler lock, a pin tumbler lock, and a disk tumbler lock. Must incorporate a separate click mechanism.
[0004]
This click mechanism has, for example, a click hole which penetrates the front end portion of the outer cylinder of the cylinder lock in a radial direction, and a click ball, for example, a click spring and a click hole formed by a compression coil spring are sequentially formed in the click hole from the inside. Is filled with a lid member that closes the opening outside the.
[0005]
Correspondingly, a concave portion into which the click ball drops is formed on the outer peripheral surface of the key guide of the inner cylinder at a predetermined angular position, and the click ball drops into the concave portion at a predetermined angular position of the inner cylinder. This is used to give a click feeling.
[0006]
[Problems to be solved by the invention]
The above-mentioned conventional click mechanism has a relatively complicated structure, and there is still room for improvement, for example, it is difficult to incorporate it into a cylinder lock having a small size such as a lock for a drawer of a desk.
[0007]
Therefore, an object of the present invention is to provide a click mechanism that can be applied to a small cylinder lock and has a simple structure.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is to reduce the diameter of the front end opening of the outer cylinder of the cylinder lock so as to form a step portion, while connecting the inner cylinder to the key guide and the tumbler support portion at the front end. At the same time, the key guide is formed with a small-diameter part that fits the reduced-diameter part of the outer cylinder and a large-diameter part with the same diameter as the tumbler support part, and the key guide has at least one click on the front end face of the large-diameter part. While the projection is provided in a protruding manner, a click recess is formed in the outer cylindrical step portion which is in sliding contact with the front end face of the large diameter portion of the key guide, and the key guide is urged forward by a wave washer.
[0009]
The invention according to claim 2 is characterized in that the wave washer is mounted between the key guide and the tumbler support.
[0010]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an outer cylinder of a cylinder lock. In this case, the cylinder lock may be any type of cylinder lock such as a pin cylinder lock, a lever tumbler cylinder lock, or a disk tumbler cylinder lock.
[0011]
The opening at the front end (the left end in FIG. 1) of the outer cylinder 1 is reduced in diameter, that is, has a smaller diameter, so that a step 2 is formed inside the front end of the outer cylinder 1.
[0012]
On the other hand, in a normal cylinder lock, the key guide of the inner cylinder and the tumbler support are integrally connected. However, in the present invention, the key guide 3 and the tumbler support 4 are separated as shown in FIG. ing.
[0013]
As shown in FIGS. 2 and 3, the key guide 3 has a small-diameter portion 3a fitted to the reduced-diameter portion of the outer cylinder, and a large-diameter portion 3b having the same diameter as the tumbler support portion 4.
[0014]
As shown in FIG. 3, at least one click convex portion 5 is protruded from the front end surface of the large diameter portion 3b.
[0015]
Correspondingly, as shown in FIG. 1, a click concave portion 6 is formed in the outer cylindrical step portion which is in sliding contact with the front end face of the large diameter portion of the key guide.
[0016]
The click projection 5 can be easily formed by injection molding, and the click recess 6 can be easily formed by drilling.
[0017]
Needless to say, the click convex portion 5 and the concave portion 6 are located at the same position in the radial direction of the outer cylinder, and they are mutually reciprocated at the locking angle position and the unlocking angle position of the cylinder lock. It is assumed that the positions where the two are formed are determined so as to engage and generate a click feeling.
[0018]
As shown in FIG. 2, each component of the click mechanism according to the embodiment of the present invention includes a key guide 3, a wave washer 7 known per se, For example, the key guide 3 is supported and guided by a retaining plate 8 of a shallow cup lock and a retaining ring 9 such as a C-ring so that the key guide 3 can rotate independently of the tumbler support 4.
[0019]
In addition, after that, the tumbler support 4 is filled in the outer cylinder, the inner cylinder is prevented from coming off by a retaining ring 9 such as an E-ring, and the cylinder lock is assembled.
[0020]
In the cylinder lock incorporating the click mechanism according to the embodiment of the present invention configured as described above, when the duplicate key 11 (see FIG. 2) is inserted into the keyhole, the key guide 3 and the tumbler are inserted through the duplicate key 11. Since the support portion 4 is integrally connected, the operation as the cylinder lock is no different from the conventional one in which the key guide and the tumbler support portion are integrally connected.
[0021]
On the other hand, the elasticity of the corrugated washer 7 acts between the key guide 3 and the holding plate 8 in the direction of increasing the distance between them. The click protrusion 5 of the key guide 3 falls into the click recess 6 of the outer cylindrical step and engages with the click recess 6 at the locking / unlocking angle position, for example.
[0022]
The present invention is not limited to the illustrated embodiment and can be implemented in various modifications. For example, in the illustrated embodiment, the key guide and the corrugated washer are used while being sandwiched between the fixed outer cylinder step and the holding plate 8. In short, the corrugated washer can exert elasticity on the key guide. If so, it is not necessary to provide a holding plate.
[0023]
【The invention's effect】
As is apparent from the above description, the present invention normally separates the integral key guide and the tumbler support portion in the axial direction, mounts a wave washer therebetween, and provides a large diameter front end of the key guide. Since the click convex portion is formed on the surface and the click concave portion is formed on the outer cylindrical step portion, and the click mechanism is constituted by these, a click mechanism having a completely new structure can be obtained.
[0024]
Also, when the key guide or the tumbler support of the inner cylinder is rotated, the two are always integrally connected via the duplicate key and do not rotate independently of each other. Various effects are exhibited, such as that the operation as a cylinder lock does not have any adverse effect even if separated.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an outer cylinder.
FIG. 2 is a vertical sectional view of a cylinder lock incorporating a click mechanism according to an embodiment of the present invention.
FIG. 3 is a side view of the key guide.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Step part 3 Key guide 4 Tumbler support part 5 Click convex part 6 Click concave part 7 Corrugated washer 8 Holding plate 9 Retaining ring 11 Double key

Claims (2)

The outer cylinder front end opening of the cylinder lock is reduced in diameter to form a step portion, while the inner cylinder is separated into a front end key guide and a tumbler support portion, and the key guide is fitted with the reduced diameter portion of the outer cylinder. A small-diameter portion and a large-diameter portion having the same diameter as the tumbler support portion are formed, and at least one click convex portion is protruded from the large-diameter portion front end surface of the key guide. A click mechanism for a cylinder lock, wherein a click recess is formed in an outer cylindrical step portion that slides, and a key guide is urged forward by a wave washer. 2. The click mechanism for a cylinder lock according to claim 1, wherein the wave washer is mounted between the key guide and the tumbler support.

Images