JPS5831957Y2 - lock - Google Patents

Description

[Detailed description of the invention] This invention is an improvement to prevent unauthorized unlocking by picking in a lock in which the latch of Kamakura etc. is operated by a cylinder lock from the outdoor side and by a legitimate child operation from the indoor side. This is what I did.

In the Congregation and Song Dynasty, the structure shown in Figure 1 was known as a structure to prevent unauthorized unlocking by picking.

That is, grooves 10a are vertically symmetrically provided in the hollow hole of the cylindrical cylinder lock 10, and the plate tumbler 11a of the rotor 11 inserted into the hollow hole of the cylinder lock 10 is connected to the grooves 10a on the upper and lower sides of the cylinder lock 10. It has invaded 10a.

By inserting a key into the lock hole 11bK provided in the rotor 11, the plate tumbler 11a enters the rotor 11, and the rotor 11 can be rotated by the key, so that the lock can be unlocked.

However, if a member other than a normal key is inserted into the lock hole 11b and the rotor 11 is rotated, the plate tumbler 1
Normally, the lock is not unlocked because the plate tumbler 1a comes into contact with the side 10b of the groove 10a, but if you repeatedly try to rotate the rotor 11, the plate tumbler 11a will come off the side 10b of the groove and sink into the rotor 11. It may become unlocked.

The present invention was developed in view of the above-mentioned drawbacks, and aims to prevent unauthorized unlocking by picking by making the rotor inside the cylinder lock rotatable.

An embodiment of the present invention will be explained below along with the drawings.
Reference numeral 1 denotes a container frame body, on which a Kamakura 2 is rotatably provided.

A second child 3 is provided on one side of the container frame 1, and the Kamakura 2 is moved in and out of the container frame 1 by rotation of the second child 3 from the indoor side to perform locking or unlocking operations.

A cylinder lock inner wall is provided on the other side of the container frame body 1, and a rotor 5 is rotatably provided inside the cylinder lock wall.

An engagement hole 6 is provided in the central shaft portion of the Kamakura 2. Further, an engaging protrusion 7 is formed on the rotor 5.

There is a space between the Kamakura 2 and the rotor 5, and a coil spring 8 as a separating means is interposed between the two.

The inner circumferential surface of the cylinder lock 4 has a large diameter portion 4a, which is a large diameter hole having a predetermined length capable of accommodating a plate tumbler 5a, which will be described later, in order in the key insertion direction via a stepped portion 4C, and a roller. A small diameter portion 4b is provided, which is a small diameter hole for guiding the movement of the rotor 5.
It is normally located at a position corresponding to the large-diameter portion 4a, and is freely rotatable, but axial movement is achieved by moving the plate tumbler 5a, which protrudes radially from the rotor, into the stepped portion 4c. Because they collide, movement can be blocked.

In this state, the Kamakura 2 can be rotated by operating the eldest child 3 from the indoor side.

However, in this state, even if an attempt is made to operate the cylinder lock 4 by picking, the rotor 5 cannot rotate freely because there is no part within the large diameter portion 4a that is caught on the plate tumbler 5a, as shown in FIGS. 3 and 5. Therefore, picking operation is impossible.

Next, when the key 9 is inserted, the plate tumbler 5a is recessed into the rotor 5, so the rotor 5 is moved in the axial direction and the engagement protrusion 7 provided at the end of the rotor 5 is inserted into the engagement hole 6 of the Kamakura 20. The key 9 can be used to rotate the Kamakura 2.

Although the object of the present invention can be achieved even if the rotor 5 is provided with a single plate tumbler 5a, by providing a plurality of plate tumblers 5a as in this embodiment, it is possible to achieve the object of the present invention. 5a into the rotor one after another to form the stepped portion 4c.
Since the lock must be passed through this part, the possibility of unauthorized unlocking can be extremely reduced.

Further, by providing a plurality of large diameter portions 4a of the cylinder lock as shown in FIG. 6, the possibility of unauthorized unlocking can be similarly extremely reduced.

Since the present invention is constructed as described above, the latch of the Kamakura etc. can be operated from the indoor side by the child, and it can be rotated from the outdoor side by inserting the key, and the rotor of the cylinder lock is attached to the inner peripheral surface. Since it is located so that it can idle in the large diameter part of the lock, it has the advantage of being able to prevent the lock from being broken by picking.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main part of the cylinder part of a conventional lock, Figures 2 to 6 are related to the present invention, Figure 2 is a perspective view of the lock, Figure 3 is a sectional view of the same as above, Figure 4 is a sectional view with the key inserted, Figure 5 is a sectional view taken along the ■-V line in Figure 3,
FIG. 6 is a sectional view of a lock showing another embodiment.

Claims (1)

[Scope of utility model registration request] A lock is provided with a heir on one side of the container frame and a cylinder lock on the other side, and a latch such as a Kamakura is operated by operating the heir or the cylinder lock, and the lock has no step on the inner peripheral surface. The cylinder lock has a cylinder lock in which the large diameter part and the small diameter part are sequentially formed in the axial direction in which the key is inserted, and a plate tumbler that can be moved in and out in the radial direction, and is movable within the hole of the cylinder lock. The plate tumbler of the rotor is located in the large diameter part of the cylinder lock, and the stepped part makes the rotor immobile in the axial direction and allows it to rotate freely. A lock comprising: inserting a tumbler into the rotor and moving the rotor in the axial direction to engage the rotor with a retaining portion provided in the Kamakura.