JPS589944Y2 - cylinder lock - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cylinder lock, and its purpose is to provide a cylinder lock which has a structure that prevents drill breakage and which is highly convenient in manufacturing and use.

An example of the implementation will be explained below with reference to the drawings. Lock A has a keyhole 5.
This is a locking mechanism in which the inner cylinder 1 is rotated with respect to the outer cylinder 2 by inserting a key to align the desk or pin tumbler, and then turning the key to rotate the inner cylinder 1 relative to the outer cylinder 2. The first half is made of a soft material, whereas the second half bodies 1b and 2b are made of a material harder than a drill, specifically tool steel, such as cemented carbide such as ceramic, which is harder than general high-speed steel, or quenched hardened steel. It is constructed with protectors 1a and 2a made of cemented carbide or other known hard materials.

The rear half 1b of the inner cylinder 1 is provided with engaging protrusions 3, 3 on both sides of the surrounding flange 14 that continues with the surface a where the keyhole 5 opens, and the protective body 1
In a, a key insertion hole 6 communicating with the keyhole 5 is opened and a part of the flange 7 is cut out to form the engaging protrusions 3, 3 and the engaging parts 4, 4.
is provided, and the protective body 1a is integrally rotated along the surface a of the rear part 1b.

The rear half 2b of the outer cylinder 2 has a small diameter around the facing side, and is provided with a fitting step 8 of the protector 2a, and holes 9, 9 for a stop pin 10, which will be described later, are bored in the step 8. The protector 2a to be fixed thereto opens the shaft hole 12 of the trunk 11 of the protector 1a, and this protector 2a is fitted into the fitting step 8 of the rear half 2b, and the stop pin 10 is inserted into the fitting hole 13. The protective body 1a is fitted loosely into the shaft hole 12 and is fitted into the hole 9 to prevent the flange 7 and 14 from slipping out forward at the opening edge of the hole. It is allowed to freely rotate within the stepped portion 15, and is pressed and locked to the rear half body 1b in the integrally rotating manner.

In the present invention, as described above, the inner cylinder and the outer cylinder are constructed with the front half made of a material harder than the drill and the second half made of a softer material, so a locking mechanism such as a tumbler is attached to the second half made of the soft material. It can be easily installed by processing and molding in a specified manner, while the front half, or protector, is harder than a drill and can completely prevent sabotage.

During manufacturing, after attaching the protector to the second half of the inner cylinder, the flange around the joining side of the protector and the second half of the inner cylinder is used in the operation process of fixing the protector to the second half of the outer cylinder As a stopper, it can be assembled integrally with a protective body on the outer cylinder to prevent it from slipping out forward, and can be manufactured in a few simple steps.

Furthermore, when in use, the protector and the rear half of the inner cylinder are integrally rotated, preventing either one from rotating freely, so the front and rear keyholes are always in alignment when inserting and opening the lock. We promise that this will be carried out smoothly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the cylinder lock of the present invention. Figure 2 is a left side view with a portion cut away. FIG. 3 is an exploded, enlarged perspective view of the main parts. In the figure 1 is the inner cylinder, 2 is the outer cylinder, 1a, 2a is the protector, 1b
, 2b is the rear half body, 3, 3 is the engagement protrusion, 4, 4 is the engagement part,
7.14 is a flange, 15 is a step.

Claims (1)

[Scope of utility model registration request] This is a cylinder lock in which the first half of the inner cylinder 1 and the outer cylinder 2 are formed of protectors 1a and 2a that are harder than a drill made of tool steel, and the joint surface of the protector 1a and the second half 1b of the inner cylinder 1 is Flanges 7.14 are provided on the outer periphery, and a retaining portion 4 and a retaining protrusion 3 that engage with the retaining portion 4 are provided relative to each other, and the flanges 7.14 are rotatable within the stepped portion 15 of the rear half body 2b of the outer cylinder 2. This is a cylinder lock in which the protector 2a is inserted into the cylinder and held in place by the protector 2a, and the protector 2a is connected and fixed to the rear half 2b.