JPH0345492Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Purpose of the invention (industrial application field) This invention relates to a cylinder lock, and in particular to its rotor fixing device.

(Prior Art and Problems to be Solved) A cylinder lock usually consists of an outer lock case and a rotor that is housed inside the outer lock case, has a plurality of tumblers, and rotates relative to the lock case. be.

In a cylinder lock having such a structure, the rotor is attached to the lock case, and the stopper tumbler located at the innermost part of the rotor is engaged with an annular recess formed on the lock case side, so that the rotor can be removed and removed. It is designed to prevent

However, the relationship between the rotor stop tumbler and the engaged part on the lock case side cannot be machined with such high precision, and for this reason there is a slight gap between the lock case and the rotor. Even though the existence of backlash cannot be avoided, and since the two rotate relative to each other, it is impossible to prevent this play from gradually increasing and becoming a hindrance to locking/unlocking operations.

The present invention has been developed to deal with this situation, and is designed to eliminate looseness between the lock case and the rotor built into the cylinder lock case, thereby ensuring stability over a long period of time. The object of the present invention is to provide a rotor fixing device for a cylinder lock that can be locked and unlocked with ease.

(2) Structure of the invention (technical means for solving the problem, its effects) (Explanation of embodiments) Figure 1 is a sectional view showing an embodiment of the invention, Figure 2 is a sectional view showing an embodiment of the invention.
The figure is a perspective view of the main part of the same.

The cylinder lock C includes a lock case 1 and a rotor 2 housed in the lock case 1. The rotor 2 includes an appropriate number of tumblers 3, and a stopper tumbler 4 located at the innermost part and always elastically protruding. is provided,
When rotor 2 is attached to lock case 1, rotor 2
The flange 2' of the lock case 1 comes into contact with the front surface of the lock case 1, and the stopper tumbler 4 formed on the back side of the rotor 2 engages with the edge of the recess 1' provided in the lock case 1, thereby closing the lock case. Relative movement between the rotor and the rotor is prevented.

In the illustrated embodiment of such a lock, an annular wave washer 5 is mounted on the rotor shaft 2'', and the washer 5 is disposed between the bottom inner surface of the lock case 1 and the bottom outer surface of the rotor 2. The rotor 2 is configured to always be elastically biased to the left in the first figure.

With this configuration, the rotor 2
The stopper tumbler 4 and the washer 5 work together to maintain the normal position with respect to the lock case 1, and can withstand long-term use and prevent rattling.

FIG. 3 shows another embodiment of the present invention,
FIG. 4 is an exploded perspective view of the main parts.

The basic structure of the lock is the same as that of the device of the embodiment described above, and corresponding parts are denoted by the same reference numerals, and a description thereof will be omitted.

As shown in the figure, in this cylinder lock, an O-ring 6, which is an elastic body, is disposed between the collar 2' of the rotor 2 and the front surface of the lock case 1.
When the rotor 2 is attached to the lock case 1 and the stopper tumbler 4 engages with the lock case 1 side, the O-
The ring 6 is arranged such that a compressed state exists in that position.

Therefore, the stopper tumbler 4 of the rotor 2 is elastically biased to one side with respect to the lock case 1 by the O-ring 6, thereby preventing rattling.

Note that the reference numeral 7 in the figure is a keyhole into which a key is inserted.

(Effect of the invention) As explained above, according to the invention, in a cylinder lock equipped with a lock case in which a rotor is housed, the relationship between the rotor and the lock case is always constant. Since the elastic member is provided, as long as the elasticity of the member acts, it is possible to effectively prevent the two from wobbling over a long period of time, and prevent wear on each part of the lock and the key, making it possible to lock and unlock in a stable state. be.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a cylinder lock showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the same, Fig. 3 is a sectional view showing another embodiment, and Fig. 4 is a main part of the same. It is an exploded slope view. 1... Lock case, 2... Rotor, 4... Stop tumbler, 5... Wave washer, 6... O
-Ring.

Claims (1)

[Scope of utility model registration request] It has a lock case and a rotor installed in the case, and a stopper tumbler, which is disposed on the rotor and always protrudes outward, engages with an engagement portion of the lock case to close the lock case of the rotor. The cylinder lock is provided with a means for elastically biasing the stopper tumbler of the rotor toward the engagement portion of the lock case between the rotor and the lock case. Rotor fixing device.