JP2005163289A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock having a high reliability to which many variable number of codes can be set and which can not be unlocked by other unlocking codes. <P>SOLUTION: The cylinder lock is constituted of a plug 6 provided with tumbler 5 positioned in the insertion hole 4 than a recess 3 forming the unlocking code of the unlocking key 2, an intermediate cylinder 9 where an intermediate pin 8 having the same length as the path length of an intermediate pin inserting hole a case 13 in which a driver pin 11 is urged to the intermediate cylinder side and inserted in the driver pin insertion hole 10 where the intermediate pin can advance/retreat, a case 13 in which a code changing body container 12 which can communicate with the tumbler insertion hole at the contact position with the plug, an appropriate number of code changing body 14 changing the actual length of the tumbler by movably operating between the code changing body container and the tumbler insertion hole, and a mode selection mechanism 15 opening one of rotation boundary cylinder face against the plug or the case of the intermediate cylinder. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cylinder lock.

  As a cylinder lock whose unlocking code is variable, one described in Patent Document 1 is known. In this conventional example, the cylinder lock is inserted into an outer cylinder (cylinder case; hereinafter, the name of the corresponding part in the present invention is shown in parentheses for easy understanding), and an intermediate cylinder is rotatably inserted. Furthermore, an inner peripheral cylinder (plug) is rotatably inserted into the intermediate cylinder.

  A base body (driver pin) is urged and mounted in the center direction on the outer cylinder, a block (intermediate pin) is attached to the intermediate cylinder, a protruding pin (tumbler) and a setting spacer (on the inner cylinder) Code change body). In the normal operation mode, when the intermediate cylinder and the plug are connected together in the rotational direction and integrated, and the unlocking code forming recess of the unlocking key inserted into the plug is planned in advance. The tumbler and the intermediate pin are driven to a position where the boundary between the intermediate pin and the driver pin coincides with the rotation boundary of the intermediate cylinder against the urging force to the driver pin, and the rotation operation to the cylinder lock is allowed.

  Further, the outer cylinder and the intermediate cylinder are provided with a change body accommodating portion that accommodates a cord change body that faces the tumbler insertion hole of the plug when the plug is rotated relative to the intermediate cylinder in the code change mode.

The code change of the cylinder lock is performed by moving an appropriate number of cord changing bodies having a thickness corresponding to the minimum step between the unlocking cord forming recesses between the tumbler insertion hole of the plug and the changing body accommodating portion, When the cord changer moves to the tumbler insertion hole side, it becomes the same state as the tumbler in the plug becomes longer, and the boundary between the intermediate pin and the driver pin is separated from the outer cylinder only when the deeper unlocking cord forming recess corresponds. It becomes possible to be located at the rotation boundary.
Japanese Patent No. 2893614

  However, the above-described conventional example has a problem that a large number of variable codes cannot be set. That is, in the above conventional example, since the intermediate cylinder and the plug are formed concentrically, the radius of the plug cannot be set to a value obtained by subtracting the length of the intermediate pin from the radius of the intermediate cylinder. When the cylinder lock is to be configured with the size of, the outer diameter of the plug is reduced. When the outer diameter of the plug is reduced, the height of the unlocking key that can be inserted is also reduced, and the types of the unlocking cord forming recesses using the height are reduced.

  In order to prevent this, it is possible to reduce the minimum step of the unlocking code forming recess, but in this case, there is a possibility that different unlocking codes can be unlocked due to accumulation of errors, etc. Reliability decreases.

  The present invention has been made to eliminate the above drawbacks, and is a highly reliable cylinder lock that can set a large number of variable codes and is not unlocked with other unlocking codes. For the purpose of provision.

According to the present invention, the object is
A plug 6 having a tumbler 5 whose position in the tumbler insertion hole 4 is determined by the unlocking cord forming recess 3 of the unlocking key 2 inserted in the key insertion hole 1 provided in the longitudinal direction;
An intermediate in which an intermediate pin 8 having the same length as the path length of the intermediate pin insertion hole 7 is inserted into an intermediate pin insertion hole 7 that circumscribes the plug 6 and rotatably holds the plug 6 so that the tumbler 5 can advance and retreat. Cylinder 9;
The intermediate cylinder 9 is rotatably held, and the driver pin 11 is urged and inserted toward the intermediate cylinder 9 into the driver pin insertion hole 10 in which the intermediate pin 8 can advance and retreat, and the tumbler is placed at the contact point with the plug 6. A case 13 in which a cord changing body accommodating portion 12 capable of communicating with the insertion hole 4 is formed;
A cord changing body 14 having a height equal to the minimum step of the unlocking cord forming recess 3 and moving between the cord changing body housing portion 12 and the tumbler insertion hole 4 to change the effective length of the tumbler 5 With the right number of
This is achieved by providing a cylinder lock having a mode selection mechanism 15 that opens only one of the rotational boundary cylindrical surfaces of the intermediate cylinder 9 with respect to the plug 6 or the case 13.

  The cylinder lock includes an intermediate cylinder 9 that can rotate within the case 13 and a plug 6 that can rotate within the intermediate cylinder 9, and selectively closes one of the two rotational boundary cylindrical surfaces. During normal operation, the mode selection mechanism 15 closes the rotational boundary cylindrical surface of the plug 6 and the intermediate cylinder 9 and connects the plug 6 and the intermediate cylinder 9 in the rotational direction. When the unlocking key 2 is inserted into the key insertion hole 1 of the plug 6 in this state, the cord changing body in the tumbler 5, the intermediate pin 8 and the tumbler insertion hole 4 is formed by the unlocking cord forming recess 3 formed in the unlocking key 2. 14 is pushed outward against the urging force of the driver pin 11 on the case 13 side.

  When the unlocking code forming recess 3 is genuine, that is, has a preset type of depth, each member has a boundary between the intermediate pin 8 and the driver pin 11 at the rotation boundary cylinder with respect to the case 13 of the intermediate cylinder 9. As a result, the plug 6 and the intermediate cylinder 9 integrated with the plug 6 can be rotated.

  As described above, whether or not the intermediate cylinder 9 and the plug 6 can rotate with respect to the case 13 depends on the surface of the unlocking cord forming recess 3 of the unlocking key 2 because the length of the intermediate pin 8 is constant. It is uniquely determined by the length to the intermediate pin 8 (tumbler effective length), and the tumbler effective length can be changed by changing the number of cord changing bodies 14 inserted between the intermediate pin 8 and the tumbler 5. it can. The height of the cord changing body 14 matches the minimum step of the unlocking cord forming recess 3, and when one cord changing body 14 is newly introduced into the plug 6, the tumbler effective length is one step. Therefore, in order to hold the intermediate pin 8 in the rotatable position, it is necessary to change the unlocking cord forming recess 3 to one deeper, and the inside of the tumbler insertion hole 4 of the cord changing body 14 The operation of changing the effective tumbler length by introducing and removing the code corresponds to the code change operation.

  The code change is performed by operating the mode selection mechanism 15 to enable the relative rotation operation of the plug 6 with respect to the intermediate cylinder 9 and then rotating the plug 6 using the conventionally used unlocking key 2. . At this time, the intermediate pin 8 having the same length as the path length of the intermediate pin insertion hole 7, when the boundary with the driver pin 11 coincides with the rotational boundary cylindrical surface with the case 13, the other end is at the same time intermediate with the plug 6. In order to coincide with the rotation boundary cylindrical surface with the cylinder 9, relative rotation of the plug 6 with respect to the intermediate cylinder 9 is not restricted.

  At the time of the cord change, the plug 6 is rotated until the tumbler insertion hole 4 faces the cord changing body accommodating portion 12 on the case 13 side. In this state, the unlock key 2 is changed to the new unlock key 2 after the cord change. When the step due to the change of the unlocking cord forming recess 3 is absorbed by the cord changing body 14, the cord change is completed.

  In the present invention in which the rotational boundary cylinder between the plug 6 and the intermediate cylinder 9 is set in a relationship inscribed in the rotational boundary cylinder between the case 13 and the intermediate cylinder 9, the diameter of the plug 6 is the maximum from the diameter of the intermediate cylinder 9. A value obtained by subtracting the length of the intermediate pin 8 can be obtained. As a result, the plug 6 can be made thicker as compared with the conventional configuration in which only the diameter obtained by subtracting twice the length of the intermediate pin 8 from the diameter of the intermediate cylinder 9 can be set. The unlocking key 2 having a sufficiently large step and a large number of types of steps can be used, so that the reliability can be improved and the number of variable codes can be increased.

The mode selection mechanism 15 includes a check pin 16 that is urged outward and is disposed corresponding to the insertion tip 2a of the unlocking key 2.
It is laminated on the check pin 16, and the end surface on the case 13 side is coincident with the rotation boundary cylindrical surface between the intermediate cylinder 9 and the case 13 in a biased state by the check pin 16, and abuts against the insertion tip 2 a of the unlocking key 2. When the cylinder lock having the mode selection pin 17 whose boundary with the check pin 16 coincides with the rotational boundary cylindrical surface between the intermediate cylinder 9 and the plug 6 is formed, the new unlocking key 2 is incompletely inserted. In some cases, since the mode selection pin 17 closes the rotational boundary cylindrical surface of the plug 6, it is possible to completely prevent a code change.

  Further, in the case where the fixed code portion 18 that does not have the code change body 14 and cannot be changed is arranged corresponding to the rear end of the unlocking key 2, the new code at the time of the code change operation is arranged. Since the insertion of the unlock key 2 is checked, an excessive code change operation using a different key or the like is prevented.

  According to the present invention, a highly reliable cylinder lock can be obtained in which a large number of variable codes can be set and unlocking with other unlocking codes is not performed.

  As shown in FIGS. 1 and 2, the cylinder lock is formed by inserting the intermediate cylinder 9 and the plug 6 into the case 13. At the front end of the case 13, a flange portion 13 a that also serves to restrict the rotation angle of the intermediate cylinder 9 is provided so as to partially cover the front end surface of the plug 6. The front end surface of the plug 6 and the flange portion 13 a are provided with FIG. The mark 19 which opposes in the neutral rotation position of the intermediate cylinder 9 shown in FIG.

  Further, a cylindrical cylinder insertion hole 13b into which the intermediate cylinder 9 is inserted is formed in the case 13 in the longitudinal direction, and a plurality of driver pin insertion holes 10, 10,... Are formed toward the center of the cylinder insertion hole 13b. It is formed. The driver pin insertion holes 10 are arranged at predetermined intervals in the longitudinal direction of the case 13 so that the center lines belong to the same plane, and the driver pin insertion holes 10 are inserted in the center direction of the cylinder insertion hole 13b by a compression spring 20a. The driver pin 11 is movably inserted so as to be movable.

  Further, the case 13 is formed with a cord change body accommodating portion 12 that faces each driver pin insertion hole 10, and is attached to each cord change body accommodating portion 12 in the center direction of the cylinder insertion hole 13b by a compression spring 20b. The cord changer driver pins 21 and an appropriate number of cord changers 14 are accommodated.

  The code changing body 14 is formed in a disc shape having a thickness equal to the minimum step of the unlocking code forming recess 3 formed in the unlocking key 2. The cord change body 14 is distributed to the cord change body accommodation portion 12 and a tumbler insertion hole 4 of the plug 6 described later corresponding to the code change body accommodation portion 12. The total number of cord change bodies 14 distributed to the cord change body accommodating portions 12 and the corresponding tumbler insertion holes 4 is the same for each pair (three in this embodiment). , Determined by the type of the unlocking code forming recess 3.

  Of the pair of the cord change body accommodating portion 12 and the corresponding tumbler insertion hole 4 configured as described above, the cord change body 14 is not assigned as the fixed code portion 18 in the front row.

  As shown in FIG. 2B, the intermediate cylinder 9 is provided with a plug insertion hole 9a. The plug insertion hole 9 a has a circular cross-sectional shape inscribed in the intermediate cylinder 9, and the contact corresponds to the cord changing body accommodating portion 12 of the case 13 in the neutral rotation position shown in FIG. In the intermediate cylinder 9, an intermediate pin insertion hole 7 aligned with the driver pin insertion hole 10 on the case 13 side in the neutral rotation position is formed corresponding to each driver pin insertion hole 10. The intermediate pin 8 is inserted into the inside. The intermediate pin 8 is formed to have the same length as the path length of the intermediate pin insertion hole 7, and at least longer than the thickness of the cord changing body 14.

  The plug 6 that is rotatably inserted into the plug insertion hole 9 a is formed with a key insertion hole 1 in the longitudinal direction, and a tumbler insertion hole 4 is formed so as to communicate with the key insertion hole 1. The tumbler insertion holes 4 are formed in positions corresponding to the respective intermediate pin insertion holes 7 at positions that are aligned with the intermediate pin insertion holes 7 of the intermediate cylinder 9 in the neutral rotation position. An appropriate number of the code modification bodies 14 is inserted.

  In the cylinder lock configured as described above, a mode selection mechanism 15 including a mode selection pin 17 and a check pin 16 is formed. In order to accommodate the mode selection pin 17 and the check pin 16, as shown in FIG. 2C, a mode selection pin insertion hole 9b is provided at the end of the intermediate cylinder 9, and a neutral is provided at the end of the plug 6. A check pin insertion hole 6a aligned with the mode selection pin insertion hole 9b at the rotational position is provided. The case 13 has a check pin driver pin insertion hole 13c that is aligned with the mode selection pin insertion hole 9b when the intermediate cylinder 9 is rotated 180 °, and is attached in the direction of the intermediate cylinder 9 by the compression spring 20c. The pressed check pin driver pin 22 is inserted.

  The check pin 16 is urged outward by a compression spring 20d accommodated in the check pin insertion hole 6a. The mode selection pin 17 pushed outward by the check pin 16 has an outer end on the case 13 side. The cylinder is in contact with the inner peripheral wall of the cylinder insertion hole 13b. The case 13 is provided with a pressing portion 15a that presses the mode selection pin 17 against the urging force of the compression spring 20d toward the plug 6 so as to be operable from the outside of the cylinder lock. The mode selection pin 17 is formed shorter than the path length of the mode selection pin insertion hole 9b, and the check pin 16 is inserted into the insertion tip 2a of the unlocking key 2 inserted into the key insertion hole 1 by the pressing portion 15a. When pushed down until it comes into contact, the boundary with the mode selection pin 17 is formed to a dimension that coincides with the rotational boundary cylindrical surface of the plug 6.

  Next, the operation of the cylinder lock configured as described above will be described. First, in the operation mode shown in FIG. 2, as shown in FIG. 2C, the check pin 16 is in a position that closes the rotational boundary cylindrical surface of the plug 6 with respect to the intermediate cylinder 9, and therefore the plug 6 and the intermediate cylinder 9. Are connected in the direction of rotation and operate integrally. In this state, whether or not the rotation operation with respect to the intermediate cylinder 9 is permitted is determined by the position of the intermediate pin 8, and as shown in FIG. 2 (b), the unlock key 2 is not inserted or is authentic. If the unlocking code forming recess 3 does not correspond, the intermediate pin 8 closes the rotation boundary cylindrical surface between the case 13 and the intermediate cylinder 9, so that the cylinder lock cannot be rotated.

  On the other hand, as shown in FIG. 3, when the genuine unlocking key 2 is inserted, all the intermediate pins 8 are completely accommodated in the intermediate pin insertion hole 7 and the rotation boundary cylindrical surface is opened. Therefore, the intermediate cylinder 9 and the plug 6 can be rotated. FIG. 1B shows a state in which the unlocking key 2 is rotated to the end of the rotation stroke regulated by the flange 13a in this state.

  Next, the code change of the cylinder lock will be described. At the time of code change, with the unlock key 2 used conventionally being inserted, first, the pressing portion 15a of the mode selection mechanism 15 is depressed to shift to the code change mode. By pressing down the pressing portion 15a, the boundary between the check pin 16 and the mode selection pin 17 coincides with the rotational boundary surface of the plug 6 with respect to the intermediate cylinder 9 as shown in FIG. 9 can be rotated relatively. When the plug 6 is rotated 180 ° in this state, as shown in FIG. 4B, the tumbler insertion hole 4 in the plug 6 faces the cord changing body housing portion 12 on the case 13 side. FIG. 1C shows a front view in this state.

  Thereafter, when the unlocking key 2 is removed, as shown in FIG. 4C, the cord changing body 14 is pushed up into the tumbler insertion hole 4 by being pushed up by the cord changing body driver pin 21, and the cord changing body is used. The end of the driver pin 21 on the plug 6 side coincides with the rotational boundary cylindrical surface between the plug 6 and the intermediate cylinder 9.

  Next, when the new unlocking key 2 is inserted, the code is changed from the tumbler insertion hole 4 according to the depth of the unlocking code forming recess 3 formed in the new unlocking key 2 as shown in FIG. The body 14 is pushed out into the cord change body accommodating portion 12. FIG. 5A shows a tumbler insertion hole after the code change when the unlocking key 2 having the unlocking cord forming recess 3 that is two steps deeper than the state of FIG. 4 shows a state in which two code changing bodies 14 are introduced corresponding to two steps.

  The code change is completed by rotating the plug 6 to the initial position using the inserted new unlocking key 2 as shown in FIG. In the state where the unlocking key 2 in the code change mode shown in FIG. 4C is removed, the rotation operation to the plug 6 can be performed without using the unlocking key 2, and therefore, for example, a new unlocking key is used. There is a possibility that a code change is made even when 2 is incompletely inserted.

  The above-described fixed cord portion 18 is inserted into the unlocking key 2 that does not have the unlocking cord forming concave portion 3 corresponding to the fixed cord portion 18 at the rear end of the insertion, or the unlocking cord forming concave portion 3 is formed by incomplete insertion. If not, the rotation boundary cylindrical surface between the plug 6 and the intermediate cylinder 9 is closed to prevent the above problem.

  In addition, the check pin 16 opens the rotation boundary cylinder of the plug 6 only in a state where the check pin 16 is in contact with the insertion tip 2a of the completely unlocked new unlocking key 2. Otherwise, as shown in FIG. Since the check pin driver pin 22 closes the rotation boundary cylinder, the above-mentioned problem is similarly prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows this invention, (a) is a neutral rotation position, (b) is the state which rotated the intermediate cylinder full stroke in operation mode, (c) shows the middle of the code change mode. It is a figure which shows the inside of a cylinder lock in the state where the unlocking key is not inserted, (a) is the 2A-2A sectional view taken on the line of Fig.1 (a), (b) is the 2B-2B line of Fig.2 (a) Sectional drawing (c) is a sectional view taken along line 2C-2C in FIG. 2 (a). It is a figure which shows the state which inserted the unlocking key, (a) is sectional drawing corresponding to Fig.2 (a), (b) is the 3B-3B sectional view taken on the line of Fig.3 (a). FIGS. 2A and 2B are diagrams showing a procedure in the first half of the code change mode, where FIG. 2A is a cross-sectional view corresponding to FIG. 2C showing a state where the pressing portion is pushed down and the mode is changed, and FIG. Sectional drawing corresponding to FIG.3 (b) which shows a state, (c) is sectional drawing which shows the state which extracted the unlocking key. The figure which shows the procedure of the latter half of code change mode, (a) is sectional drawing which shows the state which inserted the new unlocking key, (b) is a cross section which shows the state which returned to the neutral rotation position and completed code change operation | movement FIG. 4C is a cross-sectional view showing the operation of the check pin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Key insertion hole 2 Unlocking key 2a Inserting tip 3 Unlocking cord formation recessed part 4 Tumbler insertion hole 5 Tumbler 6 Plug 7 Intermediate pin insertion hole 8 Intermediate pin 9 Intermediate cylinder 10 Driver pin insertion hole 11 Driver pin 12 Code change body accommodating part 13 Case 14 Code change body 15 Mode selection mechanism 16 Check pin 17 Mode selection pin 18 Fixed code part

Claims (3)

A plug having a tumbler whose position in the tumbler insertion hole is determined by an unlocking cord forming recess of an unlocking key inserted in a key insertion hole provided in a longitudinal direction;
An intermediate cylinder that circumscribes the plug and rotatably holds the plug, and an intermediate pin having the same length as the path length of the intermediate pin insertion hole is inserted into the intermediate pin insertion hole in which the tumbler can advance and retreat.
The intermediate cylinder is rotatably held, and the driver pin is urged and inserted into the intermediate cylinder side into the driver pin insertion hole in which the intermediate pin can advance and retreat, and can communicate with the tumbler insertion hole at the contact point with the plug. A case in which a cord change body housing portion is formed;
An appropriate number of cord changing bodies having a height dimension equal to the minimum step of the unlocking cord forming recess and changing the effective length of the tumbler by moving between the cord changing body accommodating portion and the tumbler insertion hole,
A cylinder lock having a mode selection mechanism that opens only one of the rotation boundary cylindrical surfaces with respect to the plug or case of the intermediate cylinder. The mode selection mechanism includes a check pin that is urged outward and is disposed corresponding to the insertion tip of the unlocking key;
It is stacked on the check pin, and when the check pin is biased, the end surface on the case side coincides with the rotation boundary cylindrical surface between the intermediate cylinder and the case, and the boundary with the check pin is in contact with the insertion tip of the unlocking key. The cylinder lock according to claim 1, further comprising a mode selection pin that coincides with a rotational boundary cylindrical surface between the intermediate cylinder and the plug. The cylinder lock according to claim 1 or 2, wherein a fixed code portion that does not have a code change body and cannot be changed is arranged corresponding to the rear end of the unlock key.

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