JP3729752B2 - Cylinder lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylinder lock in various tumbler systems such as a lever and a pin, which is resistant to an unauthorized unlocking operation such as picking.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, in the case of a lever tumbler type cylinder lock, as shown in FIGS. 3 to 4, an outer cylinder 10 and a plurality of tumblers 14 and respective tumblers which are rotatably inserted into the outer cylinder 10 are partitioned. There is an inner cylinder 12 provided with a partition plate 11 and a locking bar 13 which is disposed in a part of the inner cylinder 12 and is urged by a spring 18a so as to protrude in the direction of the outer cylinder.
[0003]
Each of the tumblers 14 is formed in an arcuate shape or a crescent shape, and rotates around a tumbler rotating shaft 15 and is urged to rotate in a predetermined direction by a tumbler spring 16.
[0004]
The tumbler 14 is rotated clockwise around the tumbler shaft 15, and the notch recess 14 a on the outer peripheral portion moves to the position of the locking portion 13 b of the locking bar 13. When the normal key k is inserted into the key hole 11b and rotated, the notch recesses 14a of all of the plurality of tumblers 14 face the position of the locking portion 13b. The head part comes out of the recess 10a of the outer cylinder 10, and the locking part 13b is retracted to the notch recess 14a.
[0005]
By retreating the locking bar 13, the inner cylinder 12 can be rotated and rotated approximately 90 °. Thus, the cylinder lock can be unlocked.
[0006]
[Problems to be solved by the invention]
However, if the notch recesses 14a of the plurality of tumblers 14 are not aligned with the positions of the locking portions 13b of the locking bar 13, they cannot be unlocked and are resistant to picking. Rotate the inner cylinder in the unlocking direction, insert the special tool in order from the front side or the back side of the cylinder lock, and feel that the notch recess 14a is aligned with the locking portion 13b. In some cases, the unlocking may be performed even if it is not a short time. Therefore, the cylinder lock according to the present invention, as a countermeasure against picking, the unlock position of each tumbler is difficult to understand even by the touch of the hand, it becomes a lock that takes a very long time to unlock, resulting in unauthorized unlocking By preventing the problem, such a problem is solved.
[0007]
[Means for Solving the Problems]
The gist for solving the above-described problems of the cylinder lock according to the present invention is as follows: an outer cylinder, an inner cylinder that is rotatably included in the outer cylinder, and a tumbler that is partitioned by a partition plate in the inner cylinder. And a locking bar disposed on the inner cylinder and biased so as to be engaged with the outer cylinder, the portion of the tumbler unlocking means has a radius from the rotation center axis of the tumbler. With respect to the arc-shaped outer peripheral portion formed of R and in sliding contact with the locking bar, a linear portion or a reverse arc-shaped portion that maintains a state orthogonal to the axis passing through the center of the unlocking means satisfies L <R from the rotation center axis. Thus, the shape of the outer peripheral portion is formed by retreating to a radius L.
[0011]
According to the cylinder lock according to the present invention, even when trying to find the unlocking position by sliding the locking bar and the outer peripheral portion of the tumbler, the part of the unlocking means of the tumbler is formed to recede in the radial direction. Thus, the unlocking position cannot be specified, and the tumbler cannot be held in the unlocked position while being in sliding contact with the locking bar, so that unauthorized unlocking becomes extremely difficult.
[0012]
In this way, because the part of the tumbler unlocking means is formed to recede in the radial direction, it is not easy to set a plurality of tumblers to the normal unlocking position, and it is illegal many times. Since the operation must be repeated, unauthorized unlocking in a short time becomes difficult.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, the cylinder lock according to the present invention will be described with reference to the drawings. In order to facilitate understanding of the invention, portions corresponding to the conventional example are denoted by the same reference numerals as those of the conventional example.
[0014]
In the first embodiment of the cylinder lock of the present invention, the unlocking position of one or a plurality of tumblers and the locking bar that engages with the unlocking means of the tumbler is set to the normal position by dummy camouflaging means. It is intended to give the hand that it is in the unlocked position at a position that is not. Therefore, the cylinder lock may be a lever type or pin type tumbler, and the locking / unlocking structure is not particularly limited.
[0015]
Therefore, for example, a lever tumbler type cylinder lock will be described as a first embodiment. As shown in FIG. 1, a dummy camouflage means is provided in the vicinity of the notch recess 1a which is an unlocking means of the tumbler 1. Recesses 1b and 1c are provided.
[0016]
The camouflage means is appropriately provided on both sides of the notch recess 1a or on either one side. The recesses 1b and 1c are formed in the same opening shape as that of the notch recess 1a, and only the notch depth is different. Thereby, also in the camouflage means, the feel at the time of unlocking similar to the unlocking means can be obtained.
[0017]
The arrangement method of the plurality of tumblers in the cylinder lock is to arrange the camouflage means on both sides and the one provided on either one side by arbitrarily changing the arrangement and arranging them in various combinations. is there.
[0018]
The reason why the recesses 1b and 1c, which are the camouflage means, is provided is to effectively act as a countermeasure against picking. That is, a person who intends to unlock the cylinder lock illegally refers to FIG. 3 by inserting a special tool or the like from the key hole 11b and forcibly rotating the inner cylinder 12 in the unlocking direction as much as possible. Rotate in the locking direction.
[0019]
Then, due to the rotational action of the inner cylinder 12, the locking bar 13 is pressed toward the inner cylinder center portion by the withdrawal of the head portion 13 a from the recess 10 a, and the bottom surface 13 c is in sliding contact with the outer peripheral end face 1 g of the tumbler 1. .
[0020]
Therefore, the tumbler 1 is gradually rotated in the unlocking direction, and the state where the bottom surface 13c of the rocking bar 13 is in sliding contact with the outer peripheral end surface 1g is searched for while grasping from the hand feeling. Eventually, when it reaches the recess 1b, the sliding contact state of the bottom surface 13c is lost and the resistance disappears, so that it can be grasped by the touch of the hand.
[0021]
In this state, if the recess 1b of the camouflage means is a notch recess 1a of the unlocking means, an unauthorized unlocking operator is illusioned. Even when such an unauthorized operation is repeated and performed on all the plurality of tumblers, the dummy concave portion 1 b only faces the locking portion 13 b of the locking bar 13. Therefore, even if the inner cylinder 12 is rotated in the unlocking direction, the inner cylinder 12 cannot be rotated because the locking bar 13 does not sufficiently retract and remains engaged with the outer cylinder 10. Therefore, the cylinder lock cannot be unlocked.
[0022]
If the camouflage means (recesses 1b and 1c) are provided on both sides in the vicinity of the notch recess 1a, the unauthorized unlocking can be performed regardless of whether the bottom surface 13c is moved in any of the front and rear (left and right) directions. Can be prevented. For example, there is a case where the tumbler 1 is once lifted up to the top with a special tool and groping while gradually lowering from there.
[0023]
The dummy camouflage means (recesses 1b and 1c) are formed in a shape that gives almost the same unlocking feeling as the notch recess 1a of the unlocking means, so that the person who performs unauthorized unlocking This makes it difficult to distinguish between the camouflage means and the unlocking means, and it takes time for an unauthorized operation, and eventually the unlocking operation must be given up.
[0024]
The camouflage means may be provided in a plurality of places instead of one place on one side of the unlocking means 1a. This further makes it difficult to find the position of the unlocking means 1a.
[0025]
As shown in FIG. 2, the second embodiment of the present invention is a straight portion (or a flat portion) that is a feeling disappearing means that does not allow the unlocking means 2a of the tumbler 2 to recognize the sliding contact state with the locking bar 13. ) Is an example of a cylinder lock provided with 2b.
[0026]
The straight portion 2b of the tumbler 2 is, for example, an axis passing through the center of the rotation center shaft 2c and the notch recess 2a with respect to the arcuate outer peripheral portion 2d formed with a radius R from the rotation center shaft 2c of the tumbler 2. 3 is formed by retreating a straight line that maintains a state orthogonal to 3 to the rotation center axis 2c side (inside) (L <R).
[0027]
According to the second embodiment, when the cylinder lock is illegally unlocked, the inner cylinder 12 is forcibly turned in the unlocking direction as much as possible, and the locking bar 13 is moved from the outer cylinder 10 to the inner cylinder 12. The bottom surface 13c of the locking bar 13 is moved with a special tool while the back surface 13c of the locking bar 13 is moved backward, and the unlocking position is searched for while sliding on the arcuate outer peripheral portion 2d.
[0028]
However, since the outer peripheral end surface of the tumbler 2 has the arc-shaped outer peripheral portion 2d and the linear portion 2b, the sliding contact position with the locking bar 13 reaches the linear portion 2b retracted from the arc-shaped outer peripheral portion 2d. Then, the feeling of sliding contact with the bottom surface 13c disappears.
[0029]
In such a state, the locking bar 13 is in contact with the arcuate outer peripheral portion 2d of the plurality of other tumblers 2, and cannot be moved further back toward the center portion of the inner cylinder. Therefore, the straight portion 2b of the one tumbler 2 is in a suspended state that does not slide in contact with the locking bar 13, and the notch recess 2a cannot be positioned at the unlocking position with respect to the locking bar 13, and the unlocking is performed. The tumbler 2 cannot be held in position.
[0030]
In this way, by searching for the sliding contact state between the locking bar 13 and the outer peripheral portion of the tumbler 1, the outer peripheral portion of the portion of the tumbler unlocking means has retreated in the radial direction, In addition, there is a feeling disappearance means for erasing the feeling in the sliding contact state, thereby preventing unauthorized unlocking. In the second embodiment, the straight portion 2b is used. However, the present invention is not limited to this, and it may be a reverse arc-shaped portion. In short, it is sufficient that the touch in the state of sliding contact is not obtained. .
[0033]
【The invention's effect】
As described above, the cylinder lock of the present invention includes an outer cylinder, an inner cylinder that is rotatably included in the outer cylinder, a tumbler that is partitioned on the inner cylinder by a partition plate, and the inner cylinder. In a cylinder lock comprising a locking bar disposed on a cylinder and biased so as to be engaged with the outer cylinder, a portion of the tumbler unlocking means is formed with a radius R from the rotation center axis of the tumbler. With respect to the arc-shaped outer peripheral portion that is in sliding contact with the locking bar, a straight line portion or a reverse arc-shaped portion that maintains a state orthogonal to the axis passing through the center of the unlocking means has a radius L such that L <R from the rotation center axis. Since the shape of the outer peripheral part is formed by retreating, it is almost impossible to search for the unlocking position, and an excellent effect is obtained that unauthorized unlocking is prevented. .
[Brief description of the drawings]
FIG. 1 is a front view of a tumbler in a cylinder lock according to a first embodiment of the present invention.
FIG. 2 is a front view of a tumbler in a cylinder lock according to a second embodiment of the present invention.
FIG. 3 is a front view (A) and a sectional view (B) of a cylinder lock according to a conventional example.
FIGS. 4A and 4B are a front view and a cross-sectional view of a cylinder lock according to the conventional example in a state where a normal key k is inserted into a key hole. FIGS.
[Explanation of symbols]
1 Tumbler, 1a Notch recess of unlocking means,
1b, 1c Impression means recess, 2 Tumbler,
2a unlocking means, 2b straight part,
2c rotation center axis, 2d arcuate outer periphery,
10 outer cylinder, 11 partition plate,
11b key hole, 12 inner cylinder,
13 rocking bar, 13a head,
13b locking part, 13c bottom surface,
14 tumbler, 14a notch recess,
15 Tumbler shaft.

Claims (1)

An outer cylinder, an inner cylinder that is rotatably included in the outer cylinder, a tumbler that is partitioned by the inner cylinder by a partition plate, and an inner cylinder that engages with the outer cylinder. In a cylinder lock consisting of a locking bar biased by
The part of the unlocking means of the tumbler maintains a state orthogonal to the axis passing through the center of the unlocking means with respect to an arcuate outer peripheral portion formed with a radius R from the rotation center axis of the tumbler and in sliding contact with the locking bar. The rectilinear portion or the reverse arc-shaped portion is retreated with a radius L so that L <R from the rotation center axis, and the shape of the outer peripheral portion is formed,
Cylinder lock characterized by.

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