JP2010048035A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To combine miniaturization and simplification of structure while preventing a fault of a holding means. <P>SOLUTION: A cylinder lock 10 includes: a switching tumbler hole 12c; a switching tumbler 14 arranged in the switching tumbler hole and constituted to be movable in a direction to intersect a key insertion hole; and the elastic holding member 20 comprising a pair of projecting parts 20a, 20a projected axially forward, and a connecting part 20b arranged in the key insertion hole to connect the projecting parts to each other, and holding the switching tumbler in a position not to interfere with an outer cylinder 11 by engaging at least one of the pair of projecting part with the switching tumbler. The holding member is held in the key insertion hole while the pair of projecting parts being elastically deformed in a mutually approaching direction by at least one of the switching tumbler and the key insertion hole when the projecting part is engaged with the switching tumbler. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder lock, and more particularly to a structure of a cylinder lock suitable for use as a variable code lock used in a construction key system.

  In general, as a cylinder lock for buildings, during construction work, the door is opened and closed by operating the cylinder lock using a short construction key. There is known a configuration in which a door or the like is opened and closed, and once the operation key is used, the construction key cannot be used.

  As a cylinder lock for construction as described above, an engagement hole 13 is formed at a predetermined position of the user tumbler 8b, and the tumbler locking portion 22 of the holding member 20 is engaged with the engagement hole 13 to thereby There is known a configuration in which the user tumbler 8b is configured to be held in an immersive state with respect to the cylinder body 3 (see, for example, Patent Document 1 below). In this cylinder lock, the holding member 20 does not change when a construction key with a short overall length is used, but when the operation key with a long overall length is used, the key tip pushes the holding member 20 rearward in the axial direction. Is detached from the user tumbler 8b, and the user tumbler 8b is configured to be operable. Therefore, after that, even if the construction key is used, the user tumbler 8b prohibits the rotation of the cylinder, so that the locking and unlocking operations cannot be performed.

As another cylinder lock for construction, as described in the following Patent Document 2, when an operation key with a long total length is used, the tip of the key comes into contact with the inclined surface 31 of the key detection operating side 30. Since the key detection operation piece 30 is moved sideways, the slide member 20 that has been held by the key detection operation piece 30 is slid rearward in the axial direction by the elastic force of the spring 23, and the convex portion of the slide member 20. There is also known a configuration in which the user tumbler 8b that has been engaged with the member 21 is disengaged and can be operated.
JP 2003-253931 A JP 2003-293629 A

  As described above, in the cylinder lock described in Patent Document 1 provided with holding means for holding the user tumbler in an immersive state with respect to the cylinder, when vibration or impact is applied to the lock, the holding member 20 moves in the axial direction. There is a possibility that the user tumbler 8b is detached from the holding member 20. In this cylinder lock, the protrusion 22a is provided on the holding member 20 so as to engage with the edge of the engagement hole 13 of the user tumbler 8b. When the catch is small, when the catch is small, the holding member 20 moves easily when subjected to vibration or impact, and when the catch is increased, the operation key is inserted. In addition, there is a dilemma that it becomes difficult to push the holding member 20. On the other hand, the cylinder lock described in Patent Document 2 has few problems as described above, but there is a problem that parts cost and assembly cost increase because it is necessary to combine many parts.

  Further, in any of the above cylinder locks, the holding member 20 or the key detection operation piece 30 and the slide member 20 constituting the holding means are configured to be released by inserting the operation key to release the user tumbler. However, depending on the situation after that, there is a possibility that each member constituting these holding means may interfere with the user's tumbler and interfere with its operation, resulting in malfunction.

  Furthermore, in the cylinder lock described in Patent Document 1, it is necessary to move the holding member 20 to the rear side in the axial direction in order to completely remove the holding member 20 from the user tumbler 8b. Since it is necessary to form it long in the axial direction, there is a problem that it is difficult to make the cylinder lock compact. On the other hand, in the cylinder lock described in Patent Document 2, the key detection operation piece 30 and the slide member 20 can be combined to reduce the length of the cylinder lock in the axial direction. It is necessary to combine the movement of the detection actuating piece 30 to the side and the sliding movement of the slide member 20 associated therewith, and the structure becomes complicated, which increases the risk of malfunction and increases the manufacturing cost. There is a point.

  Accordingly, the present invention solves the above-mentioned problems, and the problem is to provide a cylinder lock that can prevent the problem of the holding means and achieve both compactness of the lock structure and simplification of the structure. There is.

  In view of such circumstances, the cylinder lock of the present invention includes an outer cylinder, a key insertion hole that is rotatably disposed inside the outer cylinder, and extends in the axial direction, and a tumbler that intersects and communicates with the key insertion hole. An inner cylinder having a hole, and a key protrusion that is movably accommodated in the tumbler hole and disposed in the key insertion hole, and whether or not there is interference with the outer cylinder depending on the position in the tumbler hole And a tumbler that switches between a rotatable state and a rotation restricted state of the inner cylinder by a switching tumbler that is arranged on the rear side in the axial direction of the tumbler and intersects and communicates with the key insertion hole. A switching tumbler disposed in the switching tumbler hole and configured to be movable in a direction crossing the key insertion hole, a pair of protrusions protruding forward in the axial direction, and A connecting portion that is disposed in the key insertion hole and connects between the protruding portions, and at least one of the pair of protruding portions engages with the switching tumbler so that the switching tumbler is attached to the outer cylinder. And a holding member having elasticity for holding at a position where it does not interfere, and the holding member has at least one of the switching tumbler and the key insertion hole when the protrusion is engaged with the switching tumbler. On the other hand, the pair of protrusions are held in the key insertion hole in a state of being elastically deformed in a direction approaching each other.

  According to this invention, at least one of the pair of protrusions of the holding member initially held in the adjacent hole is engaged with the switching tumbler, so that the switching tumbler is held in an immersive state with respect to the inner cylinder. As a result, the switching tumbler enters a resting state. At this time, the resting state is maintained if the holding member does not move by the key tip when a key having a short overall length is inserted into the key insertion hole. In this case, the holding member provided with the pair of protrusions and the connection portion has the pair of protrusions approaching each other by at least one of the switching tumbler and the key insertion hole when the protrusion is engaged with the switching tumbler. Since it is held in the key insertion hole in a state of being elastically deformed in the direction to which it is held, the stability of the holding member in the key insertion hole is improved by the elastic restoring force, and the holding member is difficult to move even when subjected to vibration or impact In addition, since this does not use a catch, it does not prevent the holding member from being pushed in when the operation key is inserted. Further, the holding member only needs to include a pair of projecting portions projecting forward in the axial direction, and a connecting portion that connects the pair of projecting portions and is disposed in the key insertion hole. Can be configured easily.

  In one aspect of the present invention, the key insertion hole is provided adjacent to the rear side in the axial direction of the switching tumbler hole, and in an engaged state with at least one of the pair of projecting portions with respect to the switching tumbler. An adjacent hole portion that holds the holding member in the moving direction of the switching tumbler, and a step further provided on the rear side in the axial direction of the adjacent hole portion. And the holding member is configured such that at least one of the pair of protrusions engages with the switching tumbler and is held by the adjacent hole so that the pair of the holding members is held in the adjacent hole. The protrusions of the two are elastically deformed in a direction approaching each other.

  According to the present invention, when the long-length key is inserted into the key insertion hole, the connecting portion of the holding member is pushed by the tip of the key and moves backward in the key insertion hole, so that the protruding portion is detached from the switching tumbler. If the holding member that has been elastically deformed in the direction in which the pair of protrusions approach each other is moved to the inside of the housing hole that is enlarged through the adjacent hole, the pair of protrusions are mutually connected by the elastic restoring force. Spread apart. At this time, even if stress is applied to the holding member in the direction of returning to the front side in the axial direction, the pair of projecting portions are prevented from moving forward by the step between the adjacent hole portion and the receiving hole portion. It is also possible to prevent the pair of protrusions of the holding member separated from the interference from interfering with the switching tumbler and disturbing the operation of the switching tumbler.

  In addition, since the holding member once detached from the switching tumbler as described above is surely prevented from interfering with the switching tumbler due to the step, the pair of protrusions retreat from the switching tumbler hole. In addition, the minimum distance until the step is exceeded can be set. For this reason, a cylinder lock can be comprised short in an axial direction, and compactization can be achieved.

  Further, the holding member that can be simply configured as described above is provided via an adjacent hole portion that holds the switching tumbler in the moving direction of the switching tumbler and a step further on the rear side in the axial direction of the adjacent hole portion. It is only necessary to arrange in the rear part of the key insertion hole provided with the accommodating hole part which expanded in the direction which spaces apart said pair of protrusion part rather than a part. Therefore, the overall configuration is simplified and the assembly work is easy, so that the manufacturing cost can be reduced.

  In another aspect of the present invention, the holding member is made of a U-shaped elastic material integrally provided with the pair of protruding portions and the connecting portion. According to this, since a holding member can be comprised further simply by comprising a holding member with an integral U-shaped elastic material, the effect of reduction of manufacturing cost and compactization can be improved more.

  In another aspect of the present invention, the switching tumbler has an engagement hole in the key protrusion, and the pair of protrusions engage with a pair of opening edge portions opposed to the engagement hole, respectively. According to this, since the switching tumbler must operate by engaging the key after the restriction by the holding member is released, an engagement hole for allowing the key to pass may be provided as a key engaging portion. However, when the pair of projecting portions of the holding member are engaged with the pair of opening edge portions facing each other of the engaging holes, the key projecting portion of the switching tumbler can be used as the engaging structure for the retaining member. This makes it possible to further simplify the structure of the parts.

  In yet another aspect of the present invention, a rear hole into which the holding member can be inserted is provided on the rear side in the axial direction of the housing hole, and at least a part of the rear hole is closed, and the axis of the holding member The stopper provided with the stop surface which prevents the movement to a direction back side is provided, and the said holding member can be accommodated between the said level | step difference and the said stop surface. According to this, the holding member that has moved away from the switching tumbler and moved rearward in the axial direction is prevented from further moving rearward in the axial direction by the stop surface of the stopper. Can be prevented. In addition, since the holding member can be accommodated between the step and the stop surface, a pair of protrusions are disposed in the accommodation hole portion in the accommodated state of the holding member, and the step is prevented from returning backward in the axial direction. It does not interfere with the effect of being done.

  According to the present invention, the holding member engaged with the switching tumbler is vibrated by the elastic restoring force by being held in the key insertion hole in a state in which the pair of protrusions are elastically deformed so as to approach each other. In addition, since the displacement due to the impact is suppressed, it is possible to prevent a problem caused by the holding means. Further, since the holding member is not held in the axial direction by being caught, there is an effect that it can be smoothly detached from the switching tumbler when the operation key is inserted.

  In addition, the adjacent hole portion and the receiving hole portion provided through the step can reliably prevent the holding member from interfering with the switching tumbler after being separated from the switching tumbler, and the holding means can be simply configured. In addition, the manufacturing cost can be reduced, and the distance traveled by the holding member can be shortened, so that it is possible to achieve an excellent effect that it is possible to achieve a compact size.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a schematic exploded perspective view showing an outline of the overall configuration of a cylinder lock 10 according to the present invention, FIG. 2A is a longitudinal sectional view along the axial direction of the assembled state, and FIG. 2B is a rear view of the assembled state. FIG. 2 and FIG. 2C are longitudinal sectional views along a plane perpendicular to the axial direction showing the arrangement portion of the switching tumbler 14.

  In this cylinder lock 10, an accommodating portion 11 a formed in the axial direction is provided inside, a front opening portion 11 b having a reduced diameter is formed on the front side in the axial direction, and the inner diameter of the accommodating portion 11 a is maintained on the rear side in the axial direction. It has an outer cylinder 11 provided with an open rear opening 11c. A side bar groove 11d extending in the axial direction is formed on the inner surface of the side portion of the accommodating portion 11a. In addition, a pair of engagement grooves 11e are provided on the inner surface of the accommodating portion 11a at opposing positions on the rear side in the axial direction.

  The inner cylinder 12 is accommodated in the accommodating portion 11a of the outer cylinder 11 so as to be rotatable around the axis. The inner cylinder 12 has a key insertion hole 12a extending in the axial direction. The key insertion hole 12a communicates with the front opening 11b of the outer cylinder 11 so that a construction key and an operation key described later can be inserted. In the illustrated example, the key insertion hole 12a has a vertically long rectangular opening cross section.

  The inner cylinder 12 is formed such that a plurality of tumbler holes 12b opened on at least one of the outer peripheral surfaces (upper part in the figure) intersect with the key insertion hole 12a (orthogonal in the illustrated example), and the inside communicates with the key insertion hole 12a. Is done. A switching tumbler hole 12c is formed on the rear side in the axial direction of the plurality of tumbler holes 12b. The switching tumbler hole 12c is also configured to intersect (orthogonal) and communicate with the key insertion hole 12a. Further, an outer peripheral portion (left and right side portions) in a direction different from the opening direction of the tumbler hole 12b and the switching tumbler hole 12c of the inner cylinder 12 is a side that extends in the axial direction and communicates with the tumbler hole 12b. Bar housing holes 12d and 12d are formed. Further, a rear end portion 12f provided with a rear hole 12e communicating with the key insertion hole 12a and protruding rearward in the axial direction is provided at the rear portion of the inner cylinder 12.

  A tumbler 13 is accommodated in the tumbler hole 12b. In the illustrated example, the tumbler 13 passes through the inside of the tumbler hole 12b along the guide surface formed inside the engagement hole 13a and the tumbler hole 12b which are key engagement portions provided corresponding to the key insertion holes 12a. A first tumbler piece 13A having side edges 13b, 13b for enabling sliding in the tumbler hole drilling direction (vertical direction) and a coaxial and rotatable fitting with the first tumbler piece 13A And a second tumbler piece 13B having an opening / closing recess 13c on one side outer edge and a plurality of code conversion recesses 13d on the other outer edge.

  The switching tumbler 14 is accommodated in the switching tumbler hole 12c. The switching tumbler 14 has an engagement hole 14a which is a key engagement portion formed corresponding to the key insertion hole 12a, and is arranged along a guide surface formed inside the switching tumbler hole 12c. Side edge portions 14b and 14b are formed to allow the inside to slide in the direction (vertical direction) of the switching tumbler hole 12c. In this embodiment, the engagement hole 14a includes an engagement protrusion 14x that engages with the code groove of the inner groove key. Further, a spring receiving portion 14c projecting laterally is provided on one side edge portion 14b of the switching tumbler 14, and a step portion 12g inside the spring receiving portion 14c and the switching tumbler hole 12c (FIG. 2 ( c), the spring 15 is accommodated in a compressed state.

  An engaging projection 14d is provided at the opening end of the switching tumbler hole 12c of the switching tumbler 14, and the engaging projection 14d is located at a position in the sliding direction in the switching tumbler hole 12c. Accordingly, it is configured so as to protrude from the outer peripheral surface of the inner cylinder 12. When the engaging protrusion 14 d protrudes from the outer peripheral surface of the inner cylinder 12 and is disposed in the engaging groove 11 e provided in the rear portion of the outer cylinder 11, the rotation of the inner cylinder 12 is restricted with respect to the outer cylinder 11.

  Of the side bar accommodating holes 12d, 12d of the inner cylinder 12, one side bar accommodating hole 12d accommodates an opening / closing side bar 16A, and the opening / closing side bar 16A is a spring 17 disposed at both ends in the axial direction. Therefore, it is always biased to the outer peripheral side. The inner edge portion 16a of the opening / closing side bar 16A is configured to be fitted into the opening / closing recess portion 13c of the tumbler 13, and the outer edge portion 16b is configured to be fitted into the side bar groove 11d of the outer cylinder 11.

  The other sidebar accommodating hole 12d accommodates a code conversion sidebar 16B. The code conversion sidebar 16B is always urged to the outer peripheral side by springs 17 disposed at both ends in the axial direction. Is done. The inner edge portion 16c of the code conversion side bar 16A is configured to be fitted into the code conversion recess 13d of the tumbler 13, and the outer edge portion 16d is configured to be fitted into the side bar groove 11d of the outer cylinder 11.

  The inner cylinder 12 is inserted into the housing portion 11a of the outer cylinder 11 from the rear side in the axial direction, a spacer 18 is disposed on the rear side in the axial direction of the inner cylinder 12, and a retaining ring is provided on the rear side in the axial direction of the spacer 18. By fitting 19 with an annular groove (not shown) formed on the inner surface of the outer cylinder 11, the inner cylinder 12 is held in a rotatable state in the outer cylinder 11.

  In the present embodiment, the above-described tumbler 13 accommodated in each of the plurality of tumbler holes 12b rejects the rotation of the inner cylinder 12 relative to the outer cylinder 11 in accordance with the key code of the key inserted into the key insertion hole 12a. Is determined, and whether or not locking and unlocking is possible is determined. For example, when the outer edge portion 16b of the opening / closing side bar 16A is fitted in the side bar groove 11d of the outer cylinder 11, the inner edge portion 16a of the opening / closing side bar 16A is separated from the opening / closing recess portion 13c of the tumbler 13 by the spring 17. Then, the tumbler 13 can be rotated around the position where the inner edge 16c of the code conversion side bar 16B is engaged with one of the code conversion recesses 13d. In this state, when the opening / closing recess 13c is disposed opposite to the sidebar housing hole 12d when the key cord portion is inserted into the engagement hole 13a of the tumbler 13, the opening / closing sidebar 16A is in the radial direction. Since it can move inward, the opening / closing side bar 16A can be removed from the side bar groove 11d, and the inner edge 16a of the opening / closing side bar 16A can be fitted into the opening / closing recess 13c. If the inner cylinder 12 is in a rotatable state and all the tumblers 13 are configured in this way, locking and unlocking are possible.

  When the inner cylinder 12 is rotated to a position where the code conversion side bar 16B is fitted into the side bar groove 11d of the outer cylinder 11, the inner edge 16c of the code conversion side bar 16B is moved by the spring 17 into the code conversion recess 13d. Therefore, the tumbler 13 can rotate around the position where the opening / closing recess 13c is fitted to the inner edge 16a of the opening / closing side bar 16A. In this state, the already inserted key is removed and a new key is removed. Can be inserted. When this new key has a key code corresponding to all the tumblers 13, that is, when one of the code conversion recesses 13d of the tumbler 13 is disposed opposite to the sidebar housing hole 12d when the key is inserted. Since the inner cylinder 12 can be rotated with respect to the outer cylinder 11 in the same manner as described above, if the inner cylinder is rotated with the new key inserted, code conversion corresponding to the key code of the new key will be performed. The inner edge portion 16c of the code conversion side bar 16B is fitted in the recess portion 13d. In this state, when the inner cylinder 12 is rotated back to the position where the outer edge portion 16b of the opening / closing side bar 16A is fitted in the side bar groove 11d of the outer cylinder 11, the opening / closing side bar 16A is moved to the outer side in the same manner as above. Since it fits into the side bar groove 11d of the cylinder 11, the inner edge 13a of the opening / closing side bar 16A is detached from the opening / closing recess 13c in the tumbler 13 by the spring 17, and a new code converting recess 13d is used as the code converting side bar. The tumbler 13 can be rotated around the position fitted to the inner edge 16c of 16B, and a new key can be extracted. At this time, the cylinder lock 10 has been converted into a key code corresponding to a new key.

  As shown in FIG. 2, the key insertion hole 12a of the inner cylinder 12 is formed on the rear side in the axial direction, that is, on both sides in the drilling direction (vertical direction in the figure) of the switching tumbler hole 12c behind the switching tumbler hole 12c. The rear hole 12a ′ is widened, and the holding member 20 is accommodated in the rear hole 12a ′. As shown in FIG. 6, the holding member 20 has a pair of projecting portions 20a and 20a projecting forward in the axial direction, and a connecting portion 20b disposed in the key insertion hole 12a is connected between the projecting portions 20a. It is made of an elastic material having a U-shape. In the case of the illustrated example, the holding member 20 is integrally formed of a metal thin plate material, and in a state where no external stress is applied, the pair of protrusions 20a, 20a are mutually outside (in the illustrated vertical direction, that is, the pair of protrusions 20a). , 20a are arranged so as to extend in directions away from each other.

  The holding member 20 is accommodated in the rear hole portion 12a ′ in a state where the pair of projecting portions 20a and 20a are elastically deformed in a direction approaching each other, and the tip portions of the pair of projecting portions 20a and 20a are switched. It protrudes into the tumbler hole 12c for use, and engages with the upper and lower edges of the engagement hole 14a of the switching tumbler 14 respectively.

  A stopper 21 is attached to the rear end 12f so as to be disposed in the rear hole 12e on the rear side in the axial direction of the holding member 20 to prevent the holding member 20 from falling backward. As shown in FIG. 7, the rear end 12f is provided with the rear hole 12e as described above so as to open the rear hole 12a 'to the rear side in the axial direction as it is, and the holding member from the rear side in the axial direction through the rear hole 12e. 20 is configured to be introduced into the rear hole 12a '. Then, the stopper 21 is installed in the rear hole 12e by press-fitting both sides of the stopper 21 into the rear grooves 12h formed on the left and right inner surfaces of the rear hole 12e after the holding member 20 is introduced. It is comprised so that the holding member 20 may not escape backward by the stop surface 21a comprised by the front end surface. The stopper 21 is formed in a slightly refracted shape as shown in FIG. 7, so that a required press-fitted state with respect to the rear groove 12h can be obtained so as not to be easily detached from the rear groove 12h. ing.

  Next, the holding member 20 and the surrounding structure will be described in more detail. FIG. 3 is a side view and front view (a) and (b) of the construction key 31 and the operation key 32. The construction key 31 and the operation key 32 have code portions 31a and 32a, and key portions 31b and 32b are formed in the code portions 31a and 32a, respectively. In the illustrated example, a so-called inner groove key is shown, but an outer groove key may be used as described later. The length A of the code part 31 a of the construction key 31 is configured to be shorter than the length B of the code part 32 a of the operation key 32.

  FIG. 4 is an enlarged partial longitudinal sectional view showing the rear portion of the cylinder lock 10 in an enlarged manner. In this figure, a state where the cord portion 31a of the construction key 31 is inserted into the key insertion hole 12a of the cylinder lock 10 is shown. In this case, the cord portion 31a has a short length A as described above, so that the key tip of the construction key 31 is a holding member in a normal key insertion state of the construction key 31 (a state where the key is completely inserted into the key insertion hole 12a). 20 does not substantially interfere with the axial direction, and thus the holding member 20 is configured not to move in the axial direction.

  The rear hole portion 12a 'has a shape that is enlarged in the vertical direction in the figure from the front portion of the key insertion hole 12a, and the holding member is in a state where the outer surfaces of the pair of projecting portions 20a are aligned with the rear hole portion 12a'. 20 is arranged. For this reason, the pair of protrusions 20a engages with the switching tumbler 14 at a position deviating vertically from the opening range of the front portion of the key insertion hole 12a.

  In the illustrated example, the tip portions of the pair of projecting portions 20a, 20a are stepped surfaces at the boundary portion between the front portion of the key insertion hole 12a and the rear hole portion 12a '(that is, the axially front side of the switching tumbler hole 12c). The inner surface portion). Thereby, the assembled state of the holding member 20 can be further stabilized.

  The rear hole 12a ′ is adjacent to the switching tumbler hole 12c on the rear side in the axial direction with respect to the switching tumbler hole 12c, and on the rear side in the axial direction with respect to the adjacent hole 12a-1 via the step 12a-3. It has the accommodation hole 12a-2 provided. Here, the adjacent hole portion 12a-1 positions the outer surfaces of the pair of protruding portions 20a of the holding member 20 in the sliding direction (vertical direction in the drawing) of the switching tumbler 14, and holds the holding member 20 in the same sliding direction. Thus, the switching tumbler 14 is held and fixed in the sliding direction. Moreover, said accommodating hole part 12a-2 has the opening range expanded in the direction which a pair of protrusion part 20a, 20a of the holding member 20 mutually spaces apart rather than the said adjacent hole part 12a-1.

  In the state shown in FIG. 4, the holding member 20 configured as shown in FIG. 6 has a pair of projecting portions 20a and 20a in the engagement hole 14a and the rear hole portion 12a ′ of the switching tumbler 14. It is held in a state of undergoing elastic deformation in the approaching direction. Therefore, the upper and lower outer surfaces of the pair of projecting portions 20a and 20a are pressed against the opening edge of the engagement hole 14a and the inner surface of the adjacent hole portion 12a-1 by the elastic restoring force corresponding to the elastic deformation. Since the restriction on the movement of the holding member 20 in the axial direction works, the holding member 20 is positioned and held in a stable state.

  Further, in this state, the pair of protrusions 20 a, 20 a of the holding member 20 are engaged with the opening edge of the engagement hole 14 a of the switching tumbler 14, so that the engagement protrusion 14 d of the switching tumbler 14 is the inner cylinder 12. It is held in an immersive state. Therefore, since the switching tumbler 14 is in a resting state, if the construction key 31 has a key code that matches the other tumblers 13, the inner cylinder 12 can be rotated with respect to the outer cylinder 11, and locked and unlocked. Can be operated.

  FIG. 5 is an enlarged partial longitudinal sectional view showing the rear part of the cylinder lock 10 in an enlarged manner. However, in this figure, the state where the code portion 32a of the operation key 32 is inserted into the key insertion hole 12a of the cylinder lock 10 is shown. In this case, since the cord portion 32a is configured to be longer than the cord portion 31a of the construction key 31 as described above, when the operation key 32 is properly inserted into the key insertion hole 12a, the tip thereof is inside the key insertion hole 12a. The connecting portion 20b of the holding member 20 disposed in the axial direction is pushed rearward in the axial direction, and the movement of the holding member 20 causes the pair of projecting portions 20a and 20a to disengage from the opening edge of the engagement hole 14a of the switching tumbler 14.

  Since the holding member 20 is held in the key insertion hole 12a in an elastically deformed state when engaged with the switching tumbler 14 as described above, the pair of projecting portions 20a and 20a are separated (expanded). ) The elastic restoring force is exerted on the switching tumbler 14 and the key insertion hole 12a in the direction. However, the operation key 32 is only elastically held without any portion having a hook. There is nothing to prevent when the is inserted, and the holding member 20 can be smoothly pushed rearward in the axial direction.

  And if the front-end | tip part of a pair of protrusion part 20a, 20a moves to an axial direction back side from the said level | step difference 12a-3, as shown in FIG. 5, a pair of protrusion part 20a, 20a will mutually space apart by an elastic restoring force. It spreads in the direction and is arranged in the accommodating hole 12a-2 enlarged in the direction. In this case, the pair of projecting portions 20a and 20a is still compressed in the direction in which the pair of projecting portions 20a and 20a approach each other even in the housing hole portion 12a-2, whereby the outer surfaces of the pair of projecting portions 20a and 20a It is preferable to be in a state of being pressed against the inner surface of the accommodation hole 12a-2. If it does in this way, since it will be in the state hold | maintained elastically also in the accommodation hole part 12a-2, the holding member 20 will be positioned and hold | maintained in the stable state.

  Further, in the state shown in FIG. 5, the stop surface 21 a of the stopper 21 is arranged close to or in contact with the rear side in the axial direction of the connecting portion 20 b of the holding member 20, so that the holding member 20 falls out of the cylinder lock 10. Is prevented.

  In this way, when shifting from the state shown in FIG. 4 to the state shown in FIG. 5, the distal end of the cord portion 32a pushes the connecting portion 20b rearward in the axial direction, so that the pair of protruding portions 20a, 20a The elastic restoring force that attempts to spread outward is configured to be small even temporarily. This is because, when the connecting portion 20b is pressed rearward in the axial direction, a force is exerted to deform the pair of protruding portions 20a, 20a in a direction in which the pair of protruding portions 20a, 20a approach each other.

  Once the operation key 32 is used as described above, the pair of projecting portions 20a, 20a of the holding member 20 is detached from the switching tumbler 14, so that the switching tumbler 14 that has been in a dormant state as described above can operate. Thus, if the key code of the operation key 32 is aligned with the switching tumbler 14 together with the other tumblers 13, the inner cylinder 12 can rotate with respect to the outer cylinder 11, and can be locked and unlocked. Then, since the switching tumbler 14 is in an operating state, even if the construction key 31 is used thereafter, the construction key 31 does not have a cord portion corresponding to the switching tumbler 14, so the switching is performed by the spring 15. Since the tumbler 14 moves so that the engaging protrusion 14x is located at a position indicated by a two-dot chain line in FIG. 4, the engaging protrusion 14d protrudes from the outer peripheral surface of the inner cylinder 12. As a result, the engaging projection 14d is fitted into the engaging groove 11e of the outer cylinder 11, so that the inner cylinder 12 is restricted from rotating relative to the outer cylinder 11. Therefore, the construction key 31 can be used to lock and unlock. You can't do it.

  In the present embodiment, the configuration as described above prevents the pair of protrusions 20a and 20a from interfering with the switching tumbler 14 again by the step 12a-3 after being once detached from the switching tumbler 14. Thus, it is possible to reliably prevent the occurrence of malfunction due to the holding member 20.

  Moreover, the transition to the operating state of the switching tumbler 14 and prevention of interference can be achieved only by the pair of protrusions 20a, 20a of the holding member 20 reaching the accommodation hole 12a-2 via the adjacent hole 12a-1. Therefore, it is not necessary to set the moving distance of the holding member 20 to be unnecessarily long, and the length in the axial direction of the rear portion of the cylinder lock 10 can be shortened.

  Furthermore, since the holding member 20 can have a simple shape and structure, and it is sufficient to form the adjacent hole portion 12a-1 and the accommodation hole portion 12a-2 corresponding to the holding member 20, the component processing or Since the assembly becomes easy, the manufacturing cost can be reduced.

  In the present embodiment, the pair of projecting portions 20a, 20a of the holding member 20 are configured to engage with the upper edge portion and the lower edge portion facing each other among the opening edges of the engagement hole 14a of the switching tumbler 14, respectively. Therefore, since it is not necessary to separately provide an engaging structure for the holding member 20 other than the engaging hole 14a originally provided as the key engaging portion, the structure of the switching tumbler 14 can be easily configured.

  In the present embodiment, since the rear end 12f provided with the rear hole 12e is provided in the rear end 12f of the inner cylinder 12, and the rear hole 12e of the rear end 12f is closed by the stopper 21, the cylinder lock 10, the holding member 20 can be mounted in the rear hole 12 a ′ from the rear hole 12 e and the holding surface 20 of the stopper 21 is prevented from dropping from the cylinder lock 10 after the operation key 32 is inserted by the stop surface 21 a of the stopper 21. it can.

  In the above embodiment, the engagement hole 14a provided with the engagement protrusion 14x corresponding to the inner groove key is provided as the key protruding portion, and the engagement hole 14a is enlarged in the vertical direction so that the upper edge portion and the lower edge portion thereof. Is engaged with the pair of protrusions 20a, 20a of the holding member 20, but when an outer groove key is used, for example, as shown in FIG. Since the upper edge portion or lower edge portion 14x, 14x 'of 14a' is a portion that engages with the key crest of the outer groove key, it is not impossible to engage the holding member 20 with the portion, but the operation key Considering the operation mode after the start of use of 32, it is not preferable in design. Accordingly, as shown in the figure, concave engagement grooves 14y and 14y 'are formed in the left and right side edges of the engagement hole 14a', and a pair of protrusions in the left and right direction as shown in FIG. 8B. 20a ', 20a' is provided, and a holding member 20 'having a connecting portion 20b' for connecting them is provided, and a pair of projecting portions 20a ', 20a' are engaged with the engaging grooves 14y, 14y '. The switching tumbler 14 'may be held at In this case, it is needless to say that the accommodation hole 12a-2 provided in the adjacent hole 12-1 via the step 12a-3 needs to be provided in an enlarged manner in the left-right direction.

  The holding member 20 is basically formed in a U shape having a pair of projecting portions 20a, 20a and a connecting portion 20b. For example, as shown in FIG. Of these, only the portion with which the tip of the key abuts (the portion disposed in the key insertion hole 12a) may be a deformed holding member 20 ″ having a concave shape when viewed from the front side in the axial direction. ) As a whole, it is configured in an H shape, and is basically connected to a pair of protrusions such as one having a pair of protrusions 20a ″ and 20a ″ that can be expanded and contracted separately. The holding member itself does not have to be a strict U-shape as long as it has a portion that is substantially U-shaped by the portion.

  Further, as shown in FIG. 9C, the holding member 20 ″ is configured to hold only one of the pair of protrusions 20a ″ and 20a ″ engaged with the switching tumbler 14. However, in this case, as shown in the figure, when one protruding portion 20a ″ protrudes forward in the axial direction from the other, the adjacent hole portion 12a-1 ″ and the accommodating hole portion 12a-2 correspond to this. It is necessary to configure the position of the “step 12a-3” at the boundary of the boundary in the axial direction according to the difference in the amount of protrusion between the pair of protrusions 20a. Of course, as shown in FIGS. Even when the pair of protrusions 20a and 20a has the same protrusion amount, the upper edge of the engagement hole 14a of the switching tumbler 14 happens to be formed above the illustrated example. In addition, the upper protruding portion 20a is Even if it is configured not to engage (interfere) with the replacement tumbler 14, only the protruding portion 20 a in the lower part of the figure engages with the switching tumbler 14, and thereby the switching tumbler 14 is held. Good.

  It should be noted that the cylinder lock of the present invention is not limited to the illustrated examples described above, and it is needless to say that various changes can be made without departing from the scope of the present invention. For example, in the above embodiment, the tumbler 13 has a cord variable type tumbler structure and operates in conjunction with the side bars 16A and 16B. However, the present invention is not limited to the cord variable type cylinder lock, It may be a fixed cord type cylinder lock equipped with a tumbler (plate tumbler or pin tumbler).

  In the above-described embodiment, the tumbler 13 and the switching tumbler 14 are so-called plate tumblers. However, both tumblers can be configured by pin tumblers. For example, conversion of a plurality of tumblers 13 into pin tumblers can be easily realized by a well-known technique, and the switching tumbler 14 is also formed with an engaging groove on the outer peripheral surface of the pin and held in this engaging groove. What is necessary is just to comprise so that a pair of protrusion part of a member may engage.

The schematic exploded perspective view of an embodiment of a cylinder lock. The longitudinal cross-sectional view along the axial direction (a) of the embodiment of a cylinder lock, a rear view (b), and the longitudinal cross-sectional view (c) along the direction orthogonal to an axial direction. The side view and front view (a) of a construction key, and the side view and front view (b) of an operation key. The expanded partial longitudinal cross-sectional view of the rear part of the cylinder lock in an initial state. The expanded partial longitudinal cross-sectional view of the rear part of the cylinder lock after an operation key use start. The front view (a) and side view (b) of a holding member. The top view (a) of the inner cylinder shown with a stopper, the cross-sectional view (b) of an inner cylinder, and the longitudinal cross-sectional view (c) of an inner cylinder. The front view (a) which shows the modification of the tumbler for switching, and the perspective view (b) which shows the modification of a holding member. Explanatory drawing (a) thru | or (c) which show the modification of a holding member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Cylinder lock, 11 ... Outer cylinder, 12 ... Inner cylinder, 12a ... Key insertion hole, 12a '... Back hole part, 12a-1 ... Adjacent hole part, 12a-2 ... Accommodating hole part, 12a-3 ... Level difference, 12b ... Tumbler hole, 12c ... Switching tumbler hole, 12e ... Rear hole, 12f ... Rear end, 13 ... Tumbler, 14 ... Switching tumbler, 14a ... Engagement hole, 14x ... Engagement projection, 15 ... Spring, 20 ... Holding member, 20a ... Projection, 20b ... Connection part, 21 ... Stopper, 21a ... Stop surface

Claims (5)

An outer cylinder, an inner cylinder having a key insertion hole extending in the axial direction and rotatably arranged inside the outer cylinder, and a tumbler hole communicating with the key insertion hole and moving to the tumbler hole A key projecting portion that is accommodated and disposed in the key insertion hole, and that the inner cylinder is rotatable and restricted by the presence or absence of interference with the outer cylinder according to the position in the tumbler hole. In a cylinder lock comprising a tumbler that switches between states,
A switching tumbler hole that is arranged on the rear side in the axial direction of the tumbler, intersects and communicates with the key insertion hole, is arranged in the switching tumbler hole, and is configured to be movable in a direction intersecting the key insertion hole. A switching tumbler, a pair of protrusions protruding forward in the axial direction, and a connecting portion disposed in the key insertion hole and connecting the protrusions, wherein at least one of the pair of protrusions is a switching tumbler. A holding member having elasticity to hold the switching tumbler at a position where the switching tumbler does not interfere with the outer cylinder by being engaged with each other;
The holding member is elastically deformed so that the pair of protrusions approach each other by at least one of the switching tumbler and the key insertion hole when the protrusions are engaged with the switching tumbler. A cylinder lock which is held in the key insertion hole in a state. The key insertion hole is provided adjacent to the rear side in the axial direction of the switching tumbler hole, and the holding member is attached to the switching tumbler in an engaged state with at least one of the pair of projecting portions with respect to the switching tumbler. An adjacent hole portion that is held in the moving direction, and a housing hole that is provided further on the rear side in the axial direction of the adjacent hole portion via a step and expands toward the side of the pair of protruding portions that are separated from each other than the adjacent hole portion. And
The holding member is in a state in which at least one of the pair of projecting portions is engaged with the switching tumbler and is held in the adjacent hole portion so that the pair of projecting portions are elastically deformed so as to approach each other. The cylinder lock according to claim 1, wherein:   3. The cylinder lock according to claim 1, wherein the holding member is made of a U-shaped elastic material integrally provided with the pair of projecting portions and the connecting portion.   4. The switching tumbler has an engagement hole in the key protrusion, and the pair of protrusions engage with a pair of opening edge portions opposed to the engagement hole, respectively. The cylinder lock as described in any one of.   A rear hole into which the holding member can be inserted is provided on the rear side in the axial direction of the housing hole, and at least a part of the rear hole is closed to stop the movement of the holding member in the rear side in the axial direction. The cylinder lock according to any one of claims 1 to 4, wherein a stopper having a surface is provided, and the holding member can be accommodated between the step and the stop surface.

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