JP2016079702A - Key for cabinet handle lock, and key for cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key for a cabinet handle lock that prevents coincidental unlocking with an inappropriate key, by changing a key form through a simple process.SOLUTION: A plane handle lock 4 is a cylinder lock having a plurality of tumblers 41 disposed, the tumbler undergoing a degenerating operation when a key 1 is inserted into a key hole. The key 1 has a protrusion 12a formed at a tip on a side with a plurality of key grooves 1a to be engaged with the tumbler 41, at a portion away from a position of the tumbler 41 when the key is inserted in the key hole. The protrusion 12a is formed at a same interval as the key groove 1a, so as to continue with the key groove 1a, with a height almost equivalent to a step of the key groove.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a key for a handle lock provided on a door for locking a cabinet for storing electrical equipment and the like, and more particularly to a key for a cylinder lock.

In a cabinet that houses electrical equipment, a flat handle having a cylinder lock is attached to a door (see, for example, Patent Document 1). The cylinder lock includes a tumbler cylinder lock and a pin cylinder lock. As described in Patent Document 2, a plurality of tumblers urged in one direction by a spring are arranged in a row in the outer cylinder. The tumbler is moved in a direction against the urging force of the spring by the key inserted in the key hole, so that the inner cylinder can be rotated.
A pin cylinder lock has a plurality of pins like a tumbler that are composed of a driver pin arranged on an outer cylinder and a tumbler pin that can be accommodated in the inner cylinder in front of the pin. By being arranged at the boundary, the inner cylinder can be rotated and unlocked.

JP-A-11-210277 JP-A-9-221944

However, the lock of the flat handle used in the conventional cabinet for storing electrical equipment has a problem that it is unlocked depending on conditions even if a key with a different number (incorrect key) is used.
This is because the depth of the cylinder lock incorporated in the flat handle is limited, and the number of tumblers is as small as about 5, and the machining accuracy is low. The processing accuracy of both the cylinder lock and the key used in the cabinet for storing the electric equipment has not been processed as accurately as the cylinder lock used in other applications such as doors and automobiles. As a result, even if the key is not correct, the tumbler of the cylinder lock may be aligned at the unlocked position and opened depending on the inserted state.

Specifically, this will be described with reference to the drawings. FIG. 5 shows a key of a conventional cylinder lock, and FIG. 6 is an explanatory view of a cylinder lock with an incorrect key 20 inserted. The key 20 has a knob portion 21 and a key portion having a key groove 22a as shown in FIG. 22, and the keyway 22 a is formed on one side of the key portion 22. 6 (a) shows a state in which the key 20 is inserted to the deepest position, FIG. 6 (b) shows a state in which the key groove is subtracted from the deepest position by one step, and FIG. 6 (c) shows a state in which the key 20 is subtracted by two steps. Show.
In the state where the key 20 is inserted to the deepest position, the position of the tumbler 41 is naturally not aligned as shown in FIG. 6A, and the tumbler 41 protruding from the inner cylinder 42 to the outer cylinder (not shown) exists and is unlocked. I can't. In the state shown in FIG. 6C, the deepest part of the tumbler 41 moves to the most protruded position, so that the inner cylinder cannot rotate and cannot be unlocked regardless of the position of the other tumblers 41.

  However, as shown in FIG. 6B, in the state where the distance between the tumblers 41 (2.2 mm) is pulled from the inserted state or the state where the tumbler 41 is pulled back and forth, the deepest portion is formed at the tip tapered portion 20a of the key 20. Since the tumblers 41 arranged in contact with each other and the other tumblers 41 are also engaged with the key grooves, the positions of all the tumblers 41 are accidentally aligned and fit in the inner cylinder 42. It may occur. This state matches or is close to the state in which the correct key is inserted, and unlocking becomes possible.

  As a solution to the problem of accidental unlocking due to this incorrect key, it is possible to increase the depth of the cylinder lock and increase the number of tumblers, or to increase the overall processing accuracy. It was not a solution that could be easily implemented.

  Therefore, in view of such problems, the present invention provides a cabinet handle lock that eliminates accidental unlocking by an incorrect key by simply changing the key shape without changing the structure of the conventional cylinder lock. The object is to provide keys and cylinder lock keys.

In order to solve the above-mentioned problem, the invention of claim 1 is a key of a cabinet handle lock incorporated in a handle attached to a door of a cabinet that houses electrical equipment, and locks the door, wherein the handle lock is It has a cylinder lock in which a plurality of tumblers or pins that are retracted by a key inserted from a key hole are arranged, and the key has one side portion in which a plurality of key grooves that engage with the tumblers or pins are formed. The protrusion is provided at a tip portion of the tumbler or a portion that is out of the position of the tumbler or the pin while being inserted into the key hole.
According to this configuration, even if the cylinder lock has a short depth and is incorporated into a flat handle of the cabinet, for example, by providing a protrusion at the extended tip of the key, the operation of keys other than the correct key, Even if the unlocking operation is performed in the state of being pulled, the tumbler or the pin is engaged with the protrusion and enters the outer cylinder of the cylinder lock, so that the unlocking is not performed. Therefore, even a cylinder lock with a small number of tumblers incorporated in the flat handle of the cabinet can be unlocked with an incorrect key at a low cost without changing the structure.

According to a second aspect of the present invention, in the configuration according to the first aspect, the protrusions are formed at the same interval as the key groove so as to be continuous with the key groove, and have a height substantially corresponding to one step of the key groove. And
According to this configuration, since the protrusion provided at the tip of the key is arranged in accordance with the interval of the key groove, the tumbler or pin at the deepest part is surely attached to the protrusion when the key is pulled by one groove. Engage and part enters the outer cylinder of the cylinder lock. Therefore, it cannot be unlocked by a key operation that can be unlocked conventionally.

According to a third aspect of the present invention, there is provided a key for locking and unlocking a cylinder lock in which a plurality of tumblers or pins that are retracted by a key inserted from a key hole are arranged, and a plurality of keys that engage with the tumblers or pins. A protrusion is provided at a tip portion of one side portion where the key groove is formed and at a portion deviated from the position of the tumbler or pin in a state of being inserted into the key hole.
According to this configuration, since the protrusion is provided at the extended tip of the key, even if the operation of a key other than the correct key is performed, for example, the unlocking operation is performed with the key slightly pulled forward, the tumbler at the deepest part Alternatively, since the pin engages with the protrusion and enters the outer cylinder of the cylinder lock, it is not unlocked. Therefore, unauthorized unlocking by an incorrect key can be prevented at low cost without changing the structure of the cylinder lock.

According to a fourth aspect of the present invention, in the configuration according to the third aspect, the protrusions are formed at the same interval as the key groove so as to be continuous with the key groove, and have a height substantially corresponding to one step of the key groove. And
According to this configuration, since the protrusion provided at the tip of the key is arranged in accordance with the interval of the key groove, the tumbler or pin at the deepest part is surely attached to the protrusion when the key is pulled by one groove. Engage and part enters the outer cylinder of the cylinder lock. Therefore, it cannot be unlocked by a key operation that can be unlocked conventionally.

  According to the present invention, even if the cylinder lock has a short depth and is incorporated in, for example, a flat handle of the cabinet, the protrusion is provided at the extended tip of the key, so that the operation of the key other than the correct key, for example, the key Even when the unlocking operation is performed in the state of being pulled, the tumbler or the pin is engaged with the protrusion and enters the outer cylinder of the cylinder lock, so that the unlocking is not performed. Therefore, even a cylinder lock with a small number of tumblers incorporated in the flat handle of the cabinet can be unlocked with an incorrect key at a low cost without changing the structure.

It is explanatory drawing which shows an example of the key of the cabinet handle lock which concerns on this invention. It is explanatory drawing of the handle lock for cabinets which inserted the key of FIG. 1, and the cross-sectional explanatory drawing of the plane handle is shown. It is explanatory drawing of the cylinder lock which inserted the key of FIG. 1, (a) is the correct insertion state inserted to the deepest part, (b) is the state pulled by one step of keyway, (c) is two steps of keyway. The drawn state is shown. It is explanatory drawing of the cylinder lock which inserted the correct key. It is explanatory drawing of the handle lock for the conventional cabinet. It is explanatory drawing which shows the relationship between the conventional key and a tumbler, (a) is the state inserted to the deepest part, (b) is the state pulled by one step of keyway, (c) is the state pulled by two steps of keyway. Is shown.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of a key of a cabinet handle lock according to the present invention, and shows a key of a cylinder lock. The key 1 includes a knob portion 10 and a key portion 11 having a key groove 1a. The key groove 1a is formed on one side of the key portion 11, and a plurality of key grooves 1a are formed in accordance with the position of a tumbler 41 in a cylinder 4 to be described later. Has been. The other side is flat. A groove 1b is formed on the side surface in the front-rear direction in accordance with the shape of the keyhole of the cylinder 4.

As shown in FIG. 1, the key 1 of the present invention has an extended tip as compared with the conventional key 20 shown in FIG. 5, and a protruding portion 12a is formed on the side of the extended portion 12 (FIG. 1). 1 shows the stretched portion 12 by hatching). The protrusion 12a is formed on one side where the key groove 1a is formed.
The specific height H of the protrusion 12a is projected from the reference surface F with a dimension (for example, 0.5 mm) equal to the depth of one step of the key groove 1a.
The key groove 1a is formed in two steps with respect to the reference surface F on which the key groove 1a is not formed. For example, a groove having a depth of 0.5 mm and a groove having a depth of 1.0 mm are formed. It is formed by combination.

  An interval W1 between the protrusion 12a and the adjacent key groove 1a is formed to be equal to an interval W2 between the key grooves 1a (interval of a tumbler 41 described later), and the protrusion 12a is continuous with the key groove 1a. Is formed.

  FIG. 2 is an explanatory view of the cabinet handle lock, and shows a cross-sectional explanatory view of the flat handle. The key 1 is shown inserted into the cylinder lock 4 from the key hole 4a of the flat handle 3 attached to the cabinet door 2, and the flat handle 3 and the handle main body 3a provided with the cylinder lock 4 are opened and closed. It consists of and.

The operation when the key 1 formed as described above is inserted into the cylinder lock 4 will be described below. FIG. 3 shows the relationship between the key 1 and the tumbler 41 of the cylinder lock 4. FIG. 3A shows a state in which the key 1 is inserted to the deepest part, FIG. 3B shows a state in which one key groove is pulled, and FIG. A state in which two grooves are drawn is shown. However, the key 1 and the cylinder lock 4 do not coincide with each other (the incorrect key 1 is inserted).
The cylinder lock 4 shown here is a tumbler cylinder lock 4 and shows a case where five tumblers 41 are arranged. Hereinafter, the five tumblers 41 will be described as a first tumbler 41a, a second tumbler 41b,..., A fifth tumbler 41e in order from the deepest part.

  In the state where the key 1 is inserted to the deepest part, there is no tumbler 41 engaged with the protrusion 12a, and the position of each tumbler 41 is not changed from the state shown in FIG. 6 where the conventional key 20 is inserted. Therefore, it cannot be unlocked. Further, in a state where the key groove is pulled by one step, the first tumbler 41a is engaged with the tip of the projection 12a, so that the first tumbler 41a reliably protrudes from the inner cylinder 42 and engages with the outer cylinder. The cylinder 42 cannot be rotated, that is, cannot be unlocked.

  Similarly, in the state where the key groove is pulled by two steps, the state where the key groove is pulled by three steps is engaged with the second tumbler 41b or the third tumbler 41c sequentially at the tip of the projection 12a, so The tumbler 41 protrudes from the inner cylinder 42 to prevent the inner cylinder 42 from rotating. Therefore, the inner cylinder 41 is not rotatable regardless of the position of the key 1. That is, it is not unlocked.

As described above, even in the case of the cylinder lock 4 with a short depth incorporated in the flat handle 3 of the cabinet, the protrusion 12a is provided at the extended extension portion 12 of the key 1, so that the operation of keys other than the correct key 1 can be performed. For example, even if the unlocking operation is performed with the key 1 slightly pulled forward, the deepest part of the first tumbler 41a engages with the protrusion 12a and enters the outer cylinder of the cylinder lock 4. Absent. Therefore, even with the cylinder lock 4 having a small number of tumblers 41, unlocking by an incorrect key can be prevented at a low cost without changing the structure.
Since the protrusion 12a provided at the tip of the key 1 is arranged in accordance with the interval of the key groove 1a, the first tumbler 41a at the deepest part surely protrudes when the key 1 is pulled by one groove. Part of the cylinder lock 4 enters the outer cylinder by engaging with 12a. Therefore, it cannot be unlocked by a key operation that can be unlocked conventionally.

FIG. 4 shows a cylinder lock in which the correct key 1 is inserted, and even if the key 1 is formed with a protrusion 12a, it can be unlocked as in the conventional case.
In the above embodiment, the key 1 of the tumbler cylinder lock 4 has been described. However, the key 1 can be similarly applied to a pin cylinder lock, and a correct key can be obtained by providing a protruding portion 12a at the extended tip of the key. Other than the key operation, for example, even if the key 1 is pulled by one groove, the pin at the deepest part surely engages the protrusion 12a and a part enters the outer cylinder of the cylinder lock 4. Unable to unlock with the key operation.
Further, the key of the cabinet handle lock has been described, but the structure of the key 1 can be applied to a key for unlocking many other cylinder locks, and can prevent accidental unlocking by an incorrect key.

  1 .. Key, 1a .. Key groove, 3 .. Flat handle (handle lock), 4 .. Cylinder lock, 4a .. Key hole, 12 .. Extension part, 12 a. 42 .. Inner cylinder.

Claims (4)

A key of a cabinet handle lock that is incorporated in a handle attached to a door of a cabinet that houses electrical equipment, and locks the door,
The handle lock has a cylinder lock in which a plurality of tumblers or pins that are retracted by a key inserted from a key hole are arranged,
The key is a tip portion of one side portion in which a plurality of key grooves that engage with the tumbler or pin are formed, and the key is in a portion that is out of the position of the tumbler or pin while being inserted into the key hole. A key for a cabinet handle lock, which is provided with a protrusion. The key of the cabinet handle lock according to claim 1, wherein the protrusions are formed at the same interval as the key groove so as to be continuous with the key groove, and have a height corresponding to one step of the key groove. A key for locking and unlocking a cylinder lock in which a plurality of tumblers or pins that are retracted by a key inserted from a key hole are provided,
Protrusions are provided at the tip portion of one side where a plurality of key grooves engaging with the tumbler or pin are formed, and the portion is out of the position of the tumbler or pin when inserted into the key hole. Cylinder lock key characterized by that. The key of the cylinder lock according to claim 3, wherein the protrusions are formed at the same interval as the key groove so as to be continuous with the key groove, and have a height corresponding to one step of the key groove.

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