JP2006266055A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a key from being rotated in an unlocking operation when the key does not reach a deepest position where the key is hooked to all rotating tumblers and reduce a labor for the unlocking operation by allowing the key to be automatically rotated back to a position where the key can be extracted even if an operation to rotate back to an original position where the key can be extracted when locked in a lock device having a rotating tumbler type cylinder. <P>SOLUTION: This lock device comprises a rotation prevention mechanism to prevent the rotation of the key at the position where the key is not sufficiently inserted at a key blade 1A and the outer tube of the key cylinder or the key insertion hole side movable obstructive element 2B of the rotating tumblers 4 so that the key cannot be rotated when the key 1 is at an incomplete position not positioned in the deepest position when the key 1 is inserted and operated for unlocking. To automatically rotate back the key to the original position where the key can be extracted in locking, a return spring to rotate back the rotating tumbler itself is installed in addition to a return spring mechanism rotating back an inner tube installed generally in the lock device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the rotary tumbler type key cylinder of the present invention, when unlocking, the key is inserted to a position where all the rotary tumblers in the key cylinder can be rotated in order to prevent erroneous operation at a position where the key is not completely inserted. It is equipped with a mechanism that cannot turn the key to unlock it when it is not locked, and when the key is locked, the key that has been turned to the unlocking position during the unlocking operation can be automatically removed. It is related with the locking device provided with the mechanism turned back to position.

In a lock device equipped with a conventional rotary tumbler type key cylinder, when the key is inserted and the unlocking operation is performed, the key blade is inserted halfway, and the key is turned even in an incomplete state that is not on all the rotary tumblers. Therefore, unlocking may not be possible even if the key is turned by mistake. Therefore, when the user inserts the key, he / she has to confirm the state where the key has reached a certain position (the farthest) where all the rotary tumblers can be turned and perform the unlocking operation.
In addition, when locked, the inner cylinder can be rotated back only with the conventional return spring, but the rotating tumbler cannot be rotated back to the original position. To remove the key, the original position where the key can be removed is required. It was necessary to manually turn the key back.

Problems to be solved by the invention

Do not turn the key as an unlocking operation unless the key reaches the innermost position on all the rotating tumblers.
In addition, when locking, there is no need to turn the key back to the original position where the key can be removed, and the key is automatically turned back to the position where the key can be removed, thereby reducing the trouble of the locking operation.

  The present invention solves the above-mentioned problems in a locking device having a rotary tumbler type key cylinder, and when a key is inserted and an unlocking operation is performed, the key cannot be turned at an incomplete insertion position, resulting in an erroneous operation. Furthermore, an object of the present invention is to provide a locking device having a mechanism that, when locked, automatically turns back to the original position where the key can be removed.

Means for solving the problem

  The locking device equipped with the rotary tumbler type key cylinder of the present invention is configured so that when the key is inserted and the unlocking operation is performed, the key cannot be turned at an imperfect position where the insertion has not reached the innermost position. An anti-rotation mechanism at the position where the insertion was incomplete was applied to the movable obstruction on the key insertion hole side of the blade and the key cylinder outer cylinder or the rotary tumbler.

  In addition to the return spring mechanism that rotates the inner cylinder that is generally applied, the key itself is rotated back to the inner cylinder in order to automatically rotate it back to the original position where the key can be removed when locked. A key return spring was installed.

The invention's effect

  When unlocking with the key inserted, the key cannot be rotated at a position where the insertion is incomplete and all the rotary tumblers cannot be rotated. It is no longer necessary to confirm that it has been inserted all the way into the back, making unlocking operations easier.

  When locked, it is automatically turned back to the position where the key can be pulled out, so there is no need to manually turn the key back, reducing the need for locking operation.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the locking device of the present invention will be described in detail with reference to the drawings.
[Embodiment 1]
In the first embodiment, the key blade 1A is notched at a certain position, and only the width of the notch 1B is made narrower than either the vertical width or the lateral width of the key insertion hole 2A of the outer cylinder 2 of the key cylinder, The key blade 1A can be rotated in the range of the key insertion hole 2A, and the portion other than the notch 1B is wider than either the vertical width or the lateral width of the key insertion hole 2A. This is an embodiment of a locking device provided with a rotation tumbler type key cylinder provided with a rotation prevention mechanism that has a shape that cannot rotate, and therefore cannot rotate the key 1 at a portion other than the cutout portion 1B.
FIG. 1 is an exploded view of a rotary tumbler type key cylinder according to the first embodiment. A rotary tumbler 4 is further fitted in the inner cylinder 3 fitted in the outer cylinder 2, and the outer cylinder 2 is provided with a key insertion hole 2A. By the key blade 1A inserted from the key insertion hole 2A, Although the rotary tumbler 4 is rotated, the key 1 can be rotated only when the above-described notch 1B comes to the position of the key insertion hole 2A of the outer cylinder 2.

  FIG. 2 is an explanatory view showing a state in which the key 1 of the first embodiment is inserted halfway, and a cross-sectional view at that position. The key 1 is not inserted to a certain position, and the notch 1B formed on the key blade 1A does not reach the key insertion hole 2A. At this position, the key 1 cannot be turned.

  FIG. 3 is an explanatory view showing a state in which the key 1 of the first embodiment is inserted to a certain position, and a cross-sectional view at that position. The cutout portion 1B of the key blade 1A has reached the key insertion hole 2A, and the key 1 can be turned only at this position.

[Embodiment 2]
In the second embodiment, a rotary tumbler method key is provided with a mechanism in which a notch or groove 1C is provided at a certain position of the key blade 1A, and the movable obstacle 2B can be turned only when the key 1 is inserted up to that position. It is a locking device with a cylinder.
FIG. 4 is an exploded view of the rotary tumbler type key cylinder of the second embodiment. The movable obstruction 2B fitted inside the outer cylinder 2 on the side of the key insertion hole 2A can be rotated only at the position of the notch or groove 1C formed on the key 1. A movable obstruction 2B and an inner cylinder 3 are fitted in the outer cylinder 2, and a rotary tumbler 4 is further fitted in the inner cylinder 3. The key 1 is turned in order to turn the key 1 and turn the rotary tumbler 4. When the movable obstruction 2B is inserted, the fixed state of the movable obstacle 2B is released, and the movable obstacle 2B becomes movable, and the rotary tumbler 4 can be rotated.

  FIG. 5 is an explanatory view showing a state in which the key 1 of the second embodiment is inserted halfway, and a sectional view at that position. The key 1 is not inserted to a certain position, and the notch or the groove C formed on the key blade 1A does not reach the movable obstacle 2B. At this position, the movable obstacle 2B is the outer cylinder 2 In this state, the key 1 cannot be turned.

  FIG. 6 is an explanatory view showing a state in which the key 1 of Embodiment 2 is inserted to a certain position, and a sectional view at that position. The notch or groove C of the key blade 1A has reached the movable obstruction 2B, and the convex portion of the movable obstruction 2B enters the notch or groove 1C and is pressed and fixed to the recess 2D of the outer cylinder 2. When the state is released and the key 1 is turned, the key 1 can be rotated along the outer cylinder 2 and the rotary tumbler 4 can be rotated.

[Additional Mechanism According to Embodiment 1 or 2]
In the first or second embodiment, in addition to the conventional inner cylinder return spring 3B for rotating the inner cylinder 3 when locked, a key return spring 4B for directly rotating the key blade 1A inside the inner cylinder 3 is provided. In this case, there was a drawback that the rotary tumbler 4 could not be automatically turned back to the position where the key 1 could be removed, but the position where the key 1 could be removed by adding the key return spring 4B. A mechanism that can automatically turn the key 1 back completely will be described.
In the rotary tumbler type key cylinder, when the key 1 is inserted and unlocked, in order to make the locking bar 3A movable by inserting the key 1 and aligning the notch of the rotary tumbler 4, another type of key is used. Compared to the cylinder, an extra rotation angle is required for the rotation operation that aligns the cuts of the rotary tumbler 4, and the inner cylinder 3 is rotated for the first time by rotating it further, and the inner cylinder return that is attached to the shaft The spring 3B is rotated, the movement is transmitted to a fixed cam or a fixed plate engaged with one end, the fixed state is released, and unlocking is performed. In the present specification, the description about the engagement between the fixed terminal or the hook and the inner cylinder return spring 3B during the locking / unlocking operation is omitted because it is very common and there are various combinations of members.
FIG. 7 is a structural diagram of an additional mechanism according to the first or second embodiment. When locked, the inner cylinder 3 is rotated back by the action of the inner cylinder return spring 3B that rotates back in conjunction with the fixed cam and the fixed plate to be engaged, and the rotation is transmitted to the key return spring 4B in the inner cylinder 3. When the key blade rotor 4C is rotated back, the inserted key blade 1A is interlocked and rotated, and the action of following and rotating the rotary tumbler 4 works, so that the key 1 can be removed. The key 1 is automatically turned back to the position. The inner cylinder 3 and the rotating tumbler 4 rotate in conjunction with each other up to a certain rotation angle. However, since the rotating tumbler cannot be returned to the original position only by the rotation of the inner cylinder 3, the inner cylinder 3 further has a key return spring. By providing 4B, a force to turn the rotating tumbler 4 back to the original position is applied. Constituent members are as shown in the exploded view of FIG. 1 or FIG.

It is an exploded view of Embodiment 1 of the present invention. It is explanatory drawing which shows the state which inserted the key of Embodiment 1 of this invention halfway, and sectional drawing in the position. It is explanatory drawing which shows the state which inserted the key of Embodiment 1 of this invention to the fixed position, and sectional drawing in the position. It is an exploded view of Embodiment 2 of the present invention. It is explanatory drawing which shows the state which inserted the key of Embodiment 2 of this invention halfway, and sectional drawing in the position. It is explanatory drawing which shows the state which inserted the key of Embodiment 2 of this invention to the fixed position, and sectional drawing in the position. FIG. 3 is a structural diagram of an additional mechanism according to Embodiments 1 and 2 of the present invention.

Explanation of symbols

1 key 1A key blade 1B notch 1C notch or groove 2 outer cylinder 2A key insertion hole 2B movable obstruction 2C movable obstruction pressing spring 2D dent 3 inner cylinder 3A locking bar 3B inner cylinder return spring 3C inner cylinder rotor 4 Rotating tumbler 4A Rotating tumbler partition plate 4B Key return spring 4C Key blade rotor

Claims (2)

  A lock device with a rotary tumbler type key cylinder in which the key cannot be turned unless the key is inserted to a position where all the rotary tumblers in the key cylinder can be turned.   2. A locking device according to claim 1, further comprising a rotary tumbler type key cylinder having a mechanism in which when the key is locked, the key rotated to the unlocking position when unlocked is automatically rotated back to the original position where the key can be removed. .

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