JP2005076267A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock which can positively prevent unexpected change of an unlocking code even if operation that cannot be assumed under normal operating conditions, is performed, to thereby improve the reliability thereof. <P>SOLUTION: The cylinder lock is formed of a case 4, a rotor 7, and a code changing body 8. The case houses driver pins 3 in driver pin housing holes 1 and sub-driver pin housing holes 2 therein, respectively, and the driver pins are energized toward the center of the case. The rotor is rotatably inserted into the case 4, and houses tumbler pins 6 in tumbler housing holes 5 which can be correctly positioned to the driver pin housing holes 1 and the sub-driver pin housing holes 2. The code changing body 8 is movable in both directions at a code changeable rotational location of the rotor 7, at which the sub-driver pin housing holes 2 are correctly positioned to the tumbler housing holes 5. Herein the code changeable rotational location is set outside a normal operational rotational region ranging from a rotational location for locking to a rotational location for unlocking. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cylinder lock.

  As a cylinder lock in which the unlocking code is variable, the one described in Patent Document 1 has been known. In this conventional example, a driver pin housing hole in which a tumbler pin faces directly at both the locking and unlocking rotation positions of the rotor is formed in the case for rotatably holding the rotor.

  The driver pin accommodation hole accommodates a driver pin that is urged toward the rotor side, and the cord change body is accommodated in either the driver pin accommodation hole or the tumbler accommodation hole facing the driver pin in the unlocking rotation position. .

  The code is changed by exchanging the unlocking key at the unlocking rotation position. The incision depth of the cord forming recess of the unlocking key before and after the change used for changing the code is different corresponding to the radial dimension of the code change body, and the incision of the cord forming recess of the unlocking key after the change If the depth is shallower than that before the replacement, the cord change body in the tumbler accommodation hole is pushed into the driver pin accommodation hole. As a result, the rotation boundary is changed from the boundary between the code change body and the driver pin to the boundary between the code change body and the tumbler pin.

If the unlocking key is removed by rotating it to the locking rotation position again in this state, the driver pin will enter the tumbler housing hole and block the rotation boundary with the unlocking key before the change of the depth of cut of the corresponding part. Therefore, the rotation operation to the rotor is prohibited.
Japanese Patent No. 3260724

  However, since the rotor rotation position for changing the code is set to the unlocking rotation position, the conventional example described above completely eliminates the possibility of the code changing operation being performed due to an abnormal operation or the like during normal operation. There is a problem that it cannot be done and is not reliable.

  For example, a cylinder lock cord change body adjusted to operate with an unlocking key having a cord-forming recess having a shallow cutting depth exists in the driver pin accommodation hole. In this state, when the rotor is rotated by an unlocking key having a deep cut for some reason, when reaching the unlocking rotation position, the code change body in the driver pin accommodation hole is pushed out into the tumbler accommodation hole of the rotor. Thereafter, the rotation operation by the unlocking key provided with the cord forming recess having the cut depth is permanently allowed.

  The present invention has been made to eliminate the above drawbacks, and reliably prevents the unlocking code from being accidentally changed even when an unexpected operation is performed in a normal operation state. The purpose is to provide a cylinder lock with improved reliability.

According to the present invention, the object is
A case 4 housing a driver pin 3 biased toward the center in the driver pin housing hole 1 and the sub driver pin housing hole 2;
A rotor 7 which is rotatably inserted into the case 4 and accommodates a tumbler pin 6 in a tumbler accommodation hole 5 which can face the driver pin accommodation hole 1 and the sub driver pin accommodation hole 2;
A cylinder lock having a cord changing body 8 that is movable in both directions at the cord changing rotation position of the rotor 7 in which the sub driver pin accommodation hole 2 and the tumbler accommodation hole 5 face each other.
The code changing rotation position is achieved by providing a cylinder lock that is set outside the normal operation rotation region from the locking rotation position to the unlocking rotation position.

  A driver pin 3 and a tumbler pin 6 that face each other at a predetermined rotational position of the rotor 7 are attached to the case 4 and the rotor 7 that is rotatably inserted into the case 4, and the tumbler pin 6 is connected to the rotor 7 via the driver pin 3. Energized in the center. When the unlocking key 10 having an appropriate unlocking code forming recess 10a is inserted in this state, the tumbler pin 6 is pushed out to the outer peripheral side of the rotor 7 by the unlocking key 10, and the boundary between the tumbler pin 6 and the driver pin 3 Coincides with the rotational boundary surface of the rotor 7, and the unlocked state is established in which the rotational boundary surface is opened.

  The unlocking code is changed by inserting the cord changing body 8 at the boundary between the tumbler pin 6 and the driver pin 3 or removing the cord changing body 8 inserted at the position shown in FIG. As shown in the lower half, in the state where the cord changing body 8 is interposed between the tumbler pin 6 and the driver pin 3, the rotation boundary is changed as shown in FIGS. 4 (a) and 6 (a). Either one of both ends of the body 8 can be opened by an unlocking key 10 provided with an unlocking cord forming recess 10a having two types of cut depths that match the rotation boundary surface.

  When the cord changing body 8 is removed from this state, as shown in FIG. 6B, the unlocking cord forming recess 10a having a depth at which the boundary between the tumbler pin 6 and the driver pin 3 coincides with the rotation boundary can be operated. Limited code.

  In order to supply the cord change body 8 to the boundary between the tumbler pin 6 and the driver pin 3 or to remove and store the cord modification body 8 from the boundary, the case 4 is provided with a sub driver pin accommodation hole 2 that can face the tumbler pin 6. In the code changing operation, the rotor 7 is once rotated to a position where the tumbler pin 6 is directly opposed to the sub driver pin accommodation hole 2, and then the unlocking key 10 is exchanged with the one having a new unlocking code at the position. Is called.

  In the present invention in which the code change position is set to a position that does not pass in the normal operation state, there is no possibility that the code change body 8 moves in the normal operation state, and the reliability can be improved.

  In order to enable the rotor 7 to be rotated to the code change position when the code is changed, for example, a stopper that restricts the rotation position of the rotor 7 during normal operation is operated by releasing it from the outside of the case 4. However, the operability can be further simplified by using the code changing key 10B used only when changing the code.

That is, in this case
The rotor 7 faces the detection pin drive pin 9 on the case 4 side at the end of the code change rotation position side in the normal operation rotation region, and when one end falls into the detection recess 11 recessed in the unlocking key 10. While the detection pin 12 whose other end is located at the rotation boundary with the case 4 is arranged,
A cylinder lock provided with a stroke restricting groove 13 that allows the detection pin 12 to move in the normal operation rotation region with the detection pin 12 projecting toward the case 4 is used on the inner peripheral surface of the case 4. .

  The code changing key 10 </ b> B is provided with a detection recess 11 for driving one end of the detection pin 12 attached to the rotor 7 to the rotational boundary between the case 4 and the rotor 7. The presence or absence of the detection recess 11 distinguishes the normal operation key 10A from the code change key 10B.

  According to the present invention, even when an unexpected operation is performed in a normal operation state, the unlocking code is surely prevented from being changed carelessly, so that reliability can be improved.

  As shown in FIG. 1, the cylinder lock has a case 4 in which an armor cap 4 a formed of a hard metal is fixed at a front end to prevent an attack on the rotor 7, which will be described later, and the case 4 is rotatable in the case 4. And a rotor 7 to be inserted. A key insertion groove 7a is provided in the central portion of the rotor 7 in the longitudinal direction, and a plurality of tumbler housing holes 5 are opened in a radial direction from the key insertion groove 7a.

  Two types of tumbler pins 6 of a cord variable tumbler and a cord fixing tumbler are movably inserted into each tumbler housing hole 5. The cord variable tumbler is a tumbler pin 6 on which a spherical cord changing body 8 is to be stacked, and the cord fixing tumbler has a length other than the length in which the cord changing body 8 is stacked on the code variable tumbler (in this embodiment) Is set to an intermediate length between the code variable tumbler and the code variable body 8 laminated with the code changer 8). Several types of fixed tumblers with different lengths are used.

  On the other hand, on the case 4 side, when the rotor 7 is in the locking rotation position, driver pin accommodation holes 1 that can be directly opposed to the respective tumbler accommodation holes 5 of the rotor 7 are drilled. A driver pin 3 is slidably inserted into the driver pin housing hole 1 and is urged inward of the rotor 7 by a tumbler spring 14 formed of a compression spring.

  Therefore, in this embodiment, as shown in the upper half of FIG. 3A, only the variable cord tumbler is accommodated in the tumbler accommodation hole 5 of the rotor 7 in the locking rotation position, as shown in FIG. As shown in the lower half, in the state in which the cord changing body 8 is stacked on the cord variable tumbler, and further, in the state where only the cord fixing tumbler is inserted, but the unlocking key 10 is not inserted. In any case, since the driver pin 3 enters the rotor 7 and the rotation boundary between the rotor 7 and the case 4 is blocked, the rotor 7 cannot be rotated.

  When the unlocking key 10 having the normal unlocking cord forming recess 10a is inserted from this state as shown in FIG. 4 (a), the tumbler pin 6 has a dimension corresponding to the unlocking cord forming recess 10a on the case 4 side. When the tumbler receiving hole 5 contains only the tumbler pin 6, the boundary between the tumbler pin 6 and the driver pin 3 coincides with the rotational boundary of the rotor 7. Further, when the tumbler pin 6 and the cord change body 8 are accommodated in the tumbler accommodation hole 5, the boundary between the cord change body 8 and the driver pin 3 or the cord change body 8 and the tumbler pin 6 (code variable tumbler). As a result of the boundary being coincident with the rotation boundary of the rotor 7, all the rotation boundaries are opened, and the rotation operation to the rotor 7 is allowed.

  In normal operation, the cylinder lock uses the unlocking key 10 (operation key 10A) provided with the genuine unlocking code forming recess 10a as described above to move between the locking rotation position and the unlocking rotation position. A detection pin 12 is inserted into the rotor 7 in order to determine the rotation stroke between the locking and unlocking rotation positions. As shown in FIG. 4 (b), the detection pin 12 is formed in the same shape as the tumbler pin 6, and on the case 4 side, a detection pin drive pin 9 that faces the detection pin 12 in the locking rotation position is provided by a tumbler spring 14. It is urged in the center direction and inserted.

  Further, as shown in FIG. 4B, the detection pin 12 is formed in such a size that the other end protrudes to the case 4 side while one end is in contact with the operation key 10A inserted to the normal position. 4, the other end of the detection pin 12 can be accommodated even when the detection pin 12 protrudes to the case 4 side, that is, when one end of the detection pin 12 coincides with the side surface of the key insertion groove 7a. The stroke restricting groove 13 is recessed. The stroke restricting groove 13 corresponds to the rotation stroke from the locked position to the unlocked position of the rotor 7, and the end of the rotating stroke on the locked position side is the detection pin 12 in a state where the operation key 10A is used. Due to the end wall of the stroke restricting groove 13, the end of the rotation stroke on the unlocking position side is determined by the lever 15 fixed to the rotor 7 and the stopper projection 4b protruding from the case 4 side (see FIG. 1). .

  When the rotor 7 is rotated clockwise from the locking rotation position shown in FIG. 3A toward the unlocking rotation position side, the detection pin drive pin 9 loses the support of the detection pin 12 and the tip is the outer periphery of the rotor 7. Move until it touches. Thereafter, when the rotor 7 is returned to the unlocking rotation position again, the tip of the detection pin drive pin 9 is positioned so that the detection pin drive pin 9 does not block the movement path of the detection pin 12. It is formed in a conical shape so that a component force to the outside is generated when it hits.

  Further, the case 4 is provided with a sub driver pin accommodation hole 2, and a driver pin 3 that is urged in the central direction by a tumbler pin 6 is accommodated in the sub driver pin accommodation hole 2. The sub-driver pin accommodation hole 2 is set in an area other than the rotation area used in the normal operation, and as shown in FIG. 4B, in this embodiment, from the locking rotation position to the unlocking rotation position side. Is set at a position rotated by a predetermined angle in the opposite direction.

  In order to rotate the rotor 7 to a position where the tumbler pin 6 faces the sub driver pin accommodating hole 2, a code changing key 10B is prepared. The code changing key 10B is provided with a detection recess 11 in addition to the unlocking code forming recess 10a formed at a predetermined location as in the operation key 10A. As shown in FIG. 5A, the detection recess 11 is provided at a position facing the detection pin 12 in a state where the code changing key 10B is inserted to the normal position. The detection concave portion 11 is set to a depth dimension in which the other end of the detection pin 12 coincides with the outer periphery of the rotor 7 when the tip of the detection pin 12 falls, and is formed by the detection pin 12 in this state. Further, the rotation stroke restriction of the rotor 7 is eliminated, and the rotation operation of the rotor 7 in the opposite direction is allowed. As shown in FIG. 1, the rotation angle of the rotor 7 in the opposite direction is regulated by a lever 15 fixed to the rotor 7 and a stopper projection 4b on the case 4 side.

  The code changing operation of the cylinder lock configured as described above will be described. In the code changing operation, first, the code changing key 10B having the same unlocking code forming recess 10a as the operation key 10A used in the past is inserted. As described above, the stroke restriction by the detection pin 12 is released by the insertion of the code changing key 10B, and thereafter, the rotor 7 is rotated in the opposite direction to that during normal operation so that the tumbler housing hole 5 is moved to the sub driver pin. Directly face the receiving hole 2. At this time, in order to prevent problems such as urging and leaving the cord changing body 8, it is desirable to first rotate the unlocking position first before moving to the changing position.

  After rotating the rotor 7 to the change position as described above, then, as shown in FIG. 5B, the change key before the change is removed and replaced with a change key having the unlock code after the change. . As described above, the cord change is performed by moving the cord change body 8 between the tumbler accommodation hole 5 and the auxiliary driver pin accommodation hole 2, and is located above FIGS. 4 (a) and 6 (a). As shown, when the unlocking cord forming recess 10 a is changed to a deeper one, the cord forming body is pushed out of the sub driver pin accommodation hole 2 by the driver pin 3 and moves into the tumbler accommodation hole 5. In contrast, as shown in the lower half of FIGS. 4 (a) and 6 (a), when the unlocking cord forming recess 10a is changed to a shallow one, the cord forming body is inserted by the inserted key. When the rotor 7 is pushed again from the tumbler housing hole 5 into the sub driver pin housing hole 2 and then rotated again to the locking rotation position side, the cord forming body cannot be moved, so the changed state is maintained. Is done.

  When the rotor 7 is returned to the locked rotation position and the change key is removed, thereafter, as shown in FIG. 6 (b), the lower tumbler pin 6 is moved to the rotatable position only by the shallow unlocking cord forming recess 10a. It becomes possible to drive.

It is a figure which shows this invention, (a) is sectional drawing, (b) is a 1A direction arrow directional view of (a). FIG. 2B is a sectional view taken along line 2A-2A in FIG. It is sectional drawing in a locking position, (a) is the 3A-3A sectional view taken on the line of Fig.1 (a), (b) is the 3B-3B sectional view taken on the line. It is a figure which shows the state which inserted the genuine operation key, (a) is a figure corresponding to Fig.3 (a), (b) is a figure corresponding to FIG.3 (b). FIGS. 4A and 4B are diagrams showing a code changing operation, in which FIG. 4A is a diagram showing a state where a code change key is inserted, and FIG. FIG. 5A is a cross-sectional view showing a state in which a new code change key is inserted, and FIG. 5B is a cross-sectional view after the code is changed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Driver pin accommodation hole 2 Subdriver pin accommodation hole 3 Driver pin 4 Case 5 Tumbler accommodation hole 6 Tumbler pin 7 Rotor 8 Code change body 9 Detection pin drive pin 10 Unlocking key 11 Detection recessed part 12 Detection pin 13 Stroke regulation groove

Claims (2)

A case that accommodates a driver pin that is biased toward the center in the driver pin accommodation hole and the sub driver pin accommodation hole;
A rotor that is rotatably inserted into the case and accommodates a tumbler pin in a tumbler accommodation hole that can face the driver pin accommodation hole and the sub driver pin accommodation hole;
A cylinder lock having a cord changer that is movable in both directions at the code change rotation position of the rotor in which the sub driver pin accommodation hole and the tumbler accommodation hole face each other,
A cylinder lock in which the code change rotation position is set outside a normal operation rotation area from a lock rotation position to an unlock rotation position. The rotor faces the case-side detection pin drive pin at the end of the code change rotation position side of the normal operation rotation area, and the other end is in the case when one end falls into a detection recess recessed in the unlocking key. The detection pin located at the rotation boundary with
The cylinder lock according to claim 1, wherein a stroke restricting groove is provided on the inner peripheral surface of the case to allow the detection pin to move in a normal operation rotation region with the detection pin protruding toward the case.

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