JP4690236B2 - Key cylinder - Google Patents

Description

  The present invention relates to a key cylinder in which an operation target is operated by inserting a key and rotating the key.

  As a key cylinder, a sleeve and a key rotor case are provided on the outer periphery of the key rotor, and a link member connected to an operation target such as a cable for switching an operating state of an operating part such as a lock mechanism is provided on the inner side of the key rotor and the sleeve. (For example, refer to Patent Document 1).

  In this key cylinder, when a key (regular key) is inserted into the key rotor and rotated, the key rotor is rotated together with the sleeve, so that the link mechanism coupled to the sleeve rotates and the operation target is operated. The

  On the other hand, when an insertion member (such as an irregular key) other than the key is inserted into the key rotor and rotated, the link mechanism is not rotated and the operation target is not operated because the key rotor is rotated independently from the sleeve. .

  As described above, when an insertion member other than the key is inserted into the key rotor and rotated, the rotation of the key rotor is permitted, so that an excessive force does not act on the components of the key cylinder. Thereby, breakage of the component can be suppressed, and the component can be reused.

However, the configuration is complicated and the number of parts is large, for example, the shaft inserted in a hole extending in the radial direction of the key rotor is divided into three parts. Further, since the key rotor and the sleeve cannot be rotated unless the dividing line of the shaft is flush with the circumferential surface of the key rotor or sleeve, the accuracy of parts such as the shaft must be increased. Therefore, there was a problem of high cost.
Japanese Unexamined Patent Publication No. 7-150828

  The present invention has been made in consideration of the above facts, and it is an object of the present invention to reduce the cost while suppressing breakage of components.

  The key cylinder according to claim 1 is a rotor in which an insertion hole into which a key is inserted is formed, a first housing body that rotatably accommodates the rotor, and a housing that rotatably accommodates the first housing body. The second container and the rotor can be rotated relative to the first container in a state where the key is inserted into the insertion hole, and the key is not inserted into the insertion hole. The restricting means for disabling and the rotor are connected to the first container so as to be relatively rotatable, the rotor and the first container are connected to an operation object, and the operation of the operation object is controlled by the rotor. Connecting means that makes it possible if the rotor rotates relative to the first container and makes the rotor impossible unless the rotor rotates relative to the first container.

  In the key cylinder according to claim 1, the rotor is made non-rotatable relative to the first container by the restricting means in a state where the key is not inserted into the insertion hole formed in the rotor, and the insertion hole With the key inserted into the rotor, the rotor can rotate relative to the first container. For this reason, when an insertion member other than the key is inserted into the insertion hole, the rotor rotates together with the first container.

  Further, the rotor and the first container are connected to the operation target by the connecting means, and the rotor is connected to the first container by the connecting means so as to be relatively rotatable. This connecting means enables the operation target to be operated only when the rotor rotates relative to the first container, and operates the operation target unless the rotor rotates relative to the first container. It is impossible.

  For this reason, when a key is inserted into the insertion hole and the rotor rotates independently from the first container, the operation target is operated, while an insertion member other than the key is inserted into the insertion hole, When the rotor rotates together with the first container, the operation target is not operated.

  Here, when the insertion member other than the key is inserted into the insertion hole, the rotor and the first container are configured to rotate integrally, thereby suppressing stress on the components of the key cylinder. it can.

  Further, since the restricting means and the connecting means are not involved in the relative rotation of the first container with respect to the second container, the configuration is simplified as compared with the conventional case, so that the cost can be reduced.

  A key cylinder according to a second aspect is the key cylinder according to the first aspect, wherein the key cylinder is supported by the first container so as to be rotatable about a rotation axis substantially parallel to the rotation axis of the rotor. A first engaging portion provided on the rotor or the link member, and a first engaging portion slidably engaged with the first engaging portion provided on the link member or the rotor. The engaged portion of the link member, the non-support end side of the engaged portion of the link member, and the axis of the rotor in a state where the rotation of the rotor by the key is not performed. And a connection point at which the operation objects are connected to each other.

  In the key cylinder according to claim 2, the link member is supported by the first container so as to be rotatable about a rotation axis substantially parallel to the axis of the rotor, and is provided on the rotor or the link member. One engaging portion is slidably engaged with a first engaged portion provided on the link member or the rotor.

  For this reason, when the rotor rotates together with the first container, the link member rotates about the non-support end side as a fulcrum with respect to the first engaging portion or the second engaged portion. On the other hand, when the rotor rotates independently from the first container, the link member rotates about the supporting end side as a fulcrum with respect to the first engaging portion or the first engaged portion.

  Further, a connection point to which the operation target is connected is provided on the non-support end side of the first engaging portion or the first engaged portion of the link member. This connection point is provided at a position overlapping the rotor shaft center when the rotor is not rotated by the key.

  For this reason, when the key is inserted into the insertion hole and the rotor rotates independently from the first container, the link member rotates about the rotation shaft on the support end side of the link member, so that the connecting point is displaced. Then, the operation target is operated. On the other hand, when an insertion member other than a key is inserted into the insertion hole and the rotor rotates integrally with the first container, the link member rotates about the connection point, so that the connection point is not displaced, The operation target is not operated.

  Here, the link member, etc., which is a component part of the connecting means, only needs to be aligned with the axis of the rotor, and is aligned with the peripheral surface of the rotor or the first container as in the prior art. Compared to the case, the required degree of position accuracy is low. Moreover, since the components other than the link member can be formed integrally with the rotor or the like among the components of the connecting means, the number of parts can be reduced. Therefore, since the required degree of component accuracy of the component parts of the connecting means is reduced, the manufacturing cost of the component parts of the connecting means can be reduced.

  A key cylinder according to a third aspect is the key cylinder according to the second aspect, wherein the first engaging portion is a protrusion, and the first engaged portion is slidably inserted. It is characterized by being a long hole.

  In the key cylinder according to claim 3, the protrusion provided on the rotor or the link member is slidably inserted into the long hole provided on the link member or the rotor, so that the link member can rotate the rotor. It rotates in conjunction.

  A key cylinder according to a fourth aspect is the key cylinder according to any one of the first to third aspects, wherein the second engagement unit is provided in the first container or the second container. And a second engaging portion that is provided on the second housing body or the first housing body, and the second engaging portion is disengaged by relative displacement of the first housing body with respect to the second housing body. And 2 engaged parts.

  In the key cylinder according to claim 4, the second container provided in the first container or the second container when the first container is displaced relative to the second container. The engaging part and the engaged part provided in the second container or the first container are engaged and disengaged. For this reason, when the rotor rotates independently from the first container, the first container can be prevented from rotating following the rotor, and the rotor and the first container are integrated. The rotation of the first container can be prevented from being lowered when rotating.

  Since the present invention has the above-described configuration, it is possible to suppress the breakage of the component parts and to reduce the cost.

  1A and 1B are cross-sectional views of a vehicle key cylinder 10 according to an embodiment of the present invention as viewed from the side (cross-sectional view taken along line 1-1 in FIG. 3). FIG. 3 shows the key cylinder 10 in a front view as seen from the front. In the drawing, the front of the key cylinder 10 is indicated by an arrow FR, and the upper side of the key cylinder 10 is indicated by an arrow UP.

  The key cylinder 10 according to the present embodiment includes a substantially cylindrical rotor case 11 as a second container. A front plate 11A is disposed on the front surface of the rotor case 11, and the front plate 11A is formed in an annular shape so as to open a central portion (other than the peripheral portion) in the rotor case 11 forward.

  A substantially cylindrical sleeve 12 as a first container is provided in the rotor case 11, and the sleeve 12 is rotatable around the central axis. A front plate 12A is disposed on the front surface of the sleeve 12, and the front plate 12A is formed in an annular shape so as to open a central portion (other than the peripheral portion) in the rotor case 11 forward.

  A substantially cylindrical rotor 20 is provided in the sleeve 12, and the rotor 20 is rotatable around the central axis. The front portion of the rotor 20 is a stopper 20A having an enlarged diameter, and the stopper 20A comes into contact with the front plate 12A of the sleeve 12 so that the rotor 20 does not come out of the sleeve 12 forward.

  A concave moderation groove 16 as a second engaged portion is formed at the rear upper end of the inner peripheral surface of the rotor case 11. As shown in FIG. 4, the moderation groove 16 is V-shaped. Yes.

  On the other hand, a columnar arrangement hole 22 is formed in the rear part of the sleeve 12, and the arrangement hole 22 is arranged along the vertical direction (in the radial direction of the sleeve 12) and opened from the upper surface of the sleeve 12. Yes.

  A spherical moderation ball 24 as a second engagement portion is disposed in the arrangement hole 22, and a compression coil spring 26 as an urging member is provided between the moderation ball 24 and the bottom surface of the arrangement hole 22. Is overlaid. Accordingly, as shown in FIGS. 1A and 1B, the moderation ball 24 is urged upward (outward in the sleeve 12 radial direction) by the compression coil spring 26, thereby contacting the moderation groove 16. Thus, the rotation of the moderation ball 24 to both sides in the circumferential direction of the sleeve 12 is suppressed by the pair of inclined surfaces 18, so that the rotational position of the sleeve 12 is positioned at the neutral rotational position via the moderation ball 24.

  In addition, a plurality of concave portions 14 having a rectangular cross section forming a limiting means are formed in the front-rear direction on the inner peripheral surface of the sleeve 12 in the middle portion in the front-rear direction. The recess 14 is formed in a part of the inner peripheral surface of the sleeve 12 in the circumferential direction.

  A plurality of flat plate-like arrangement grooves 28 are formed in the front-rear direction corresponding to the plurality of concave portions 14 of the sleeve 12 at the middle part in the front-rear direction of the rotor 20. It is open.

  As shown in detail in FIG. 5, a flat tumbler 30 constituting a restricting means is inserted and arranged in the arrangement groove 28, and the tumbler 30 can be slid (moved) vertically in the arrangement groove 28. Has been. A coil spring 32 as an urging member is bridged between the tumbler 30 and the rotor 20, and the tumbler 30 protrudes upward from the peripheral surface of the rotor 20 and is inserted into the recess 14. . As a result, the tumbler 30 is engaged with the rear surface of the recess 14 to restrict the sliding of the rotor 20 in the front-rear direction, and the movement of the tumbler 30 in the circumferential direction of the sleeve 12 is restricted. The rotation is limited. A substantially rectangular through hole 34 is formed through the central portion of the tumbler 30, and a protrusion 34 </ b> A is formed on one side of the through hole 34 in the left-right direction (or both sides in the left-right direction). 34 protrudes into the inside.

  A rectangular plate-like key insertion hole 36 is formed in the rotor 20, and the key insertion hole 36 is disposed along the central axis of the rotor 20, and the front surface of the rotor 20 and the center of the front plate 12 </ b> A of the sleeve 12. It opens to the front through the part. As shown in FIG. 1B, a regular key 38 as a key can be inserted into the key insertion hole 36 from the front, and one side surface of the regular key 38 in the left-right direction (both sides in the left-right direction may be used). Is formed with a concave keyway 38A. For this reason, when the regular key 38 is inserted into the key insertion hole 36, the regular key 38 is penetrated into the through hole 34 of each tumbler 30, and the periphery of the key groove 38 </ b> A of the regular key 38 is each through hole 34. Each tumbler 30 is slidable downward against the urging force of the coil spring 32 by pressing the projection 34A downward. Thus, the insertion of each tumbler 30 into each recess 14 is released, and the rotation of the rotor 20 within the sleeve 12 (relative rotation with respect to the sleeve 12) is permitted.

  As shown in FIG. 2, when an insertion member 39 (for example, an unauthorized key) 39 other than the regular key 38 is inserted into the key insertion hole 36, each tumbler 30 remains inserted in the recess 14. Thus, the rotation of the rotor 20 within the sleeve 12 (relative rotation with respect to the sleeve 12) is limited.

  Further, as shown in FIG. 6, an engagement protrusion 20 </ b> B is formed on the stopper portion 20 </ b> A of the rotor 20, and an engagement protrusion 12 </ b> B is formed on the inner periphery of the sleeve 12. The engaging protrusion 20B and the engaging protrusion 12B are disposed in the same plane in the axial direction of the rotor 20 and the sleeve 12.

  A back spring (torsion coil spring) 48 is disposed on the front side in the sleeve 12, and the rotor 20 is inserted through the inner periphery of the back spring 48. Both end portions of the back spring 48 are bent at a substantially right angle outward in the radial direction, and are hooked on the engaging protrusion 20B and the engaging protrusion 12B. As shown in the drawing, the rotational position of the rotor 20 matches the insertion / extraction position of the regular key 38 in a state where the engaging protrusions 20B and the engaging protrusions 12B are aligned in the radial direction.

  Further, as shown in FIG. 7, an operating mechanism 100 such as a door lock mechanism is connected to the rotor 20 and the sleeve 12 via a link mechanism 50 as a connecting means, and the rotor 20 is not rotated without the sleeve 12 rotating. Only the rotation of the operating mechanism 100 is activated (for example, the door is locked or unlocked).

  The link mechanism 50 includes a link plate 52 that is an elongated plate member as a link member, a pivot 54 that rotatably supports one end portion in the longitudinal direction of the link plate 52 on the rear end surface of the sleeve 12, and a rear end surface of the rotor 20. And a boss 56 as a first engagement portion.

  The link plate 52 is formed with a circular hole 52A into which the pipette 54 is inserted at one end in the longitudinal direction, and a long hole 52B as a first engaged portion extending longitudinally in the longitudinal direction at the center in the longitudinal direction. A circular hole 52C is formed at the other end portion in the longitudinal direction as a connection point to which the cable 58 connected to the operation mechanism 100 is attached. A boss 56 is slidably inserted into the long hole 54B. The circular hole 52 </ b> C is disposed so as to coincide with the axis of the rotor 20 in a state where the key 38 is not inserted into the insertion hole 36. The pivot 54 is substantially parallel to the rotation axis of the rotor 20.

  Next, the operation of the present embodiment will be described.

  In the key cylinder 10 configured as described above, as shown in FIG. 1B, when the regular key 38 is inserted into the key insertion hole 36 of the rotor 20 from the front, the insertion of the tumbler 30 into the recess 14 is released. Thus, the rotation of the rotor 20 within the sleeve 12 is permitted.

  Accordingly, when the regular key 38 is rotated, the rotor 20 is rotated and the boss 56 provided on the rotor 20 is also rotated. On the other hand, the sleeve 12 is not rotated, and the pivot 54 provided on the sleeve 12 is not rotated.

  For this reason, as shown in FIG. 8, the link plate 52 rotates clockwise or counterclockwise with the pivot 54 as a fulcrum, so that the connecting point 52C provided at the rotating end of the link plate 52 moves up and down. The cable 58 moves up and down, and the operating state of the operating mechanism 100 is switched. Here, for example, the operating mechanism 100 locks the door in conjunction with the rise of the cable 58 and unlocks the door in conjunction with the lowering of the cable 58.

  On the other hand, when the regular key 38 is not inserted into the key insertion hole 36 of the rotor 20, as shown in FIG. 2, the tumbler 30 is inserted into the recess 14 and the rotation of the rotor 20 within the sleeve 12 is restricted. . For this reason, when the insertion member 39 other than the regular key 38 is inserted into the key insertion hole 36 of the rotor 20 and rotated, the moderation ball 24 resists the urging force of the compression coil spring 26 from the moderation groove 16. It is detached and brought into contact with the inner peripheral surface of the rotor case 11 at a position near the rear side of the moderation groove 16.

  Thus, even when the insertion member 39 other than the regular key 38 is inserted into the key insertion hole 36 of the rotor 20, the rotation of the rotor 20 and the sleeve 12 by the rotation operation of the insertion member 39 is permitted. Unreasonable force does not act on the components. Thereby, it is possible to suppress breakage of the component parts with a simple configuration, and it is possible to reuse the component parts.

  As shown in FIG. 9, when the insertion member 39 inserted into the key insertion hole 36 of the rotor 20 is rotated, the rotor 20 and the sleeve 12 are integrally rotated relative to the rotor case 11. Here, the link plate 52 rotates around the other end in the longitudinal direction and the axis of the rotor 20 as a fulcrum, and a circular hole 52C is disposed at this fulcrum. For this reason, the cable 58 connected to the circular hole 52C and the circular hole 52C is not displaced.

  As described above, when the insertion member 39 other than the regular key 38 is inserted into the key insertion hole 36 of the rotor 20, the operating mechanism 100 is not operated because the cable 58 is not interlocked with the rotation operation of the insertion member 39. For example, the door is not locked or unlocked.

  Further, after the rotor 20 rotates in the sleeve 12, the rotor 20 automatically returns to the neutral rotation position by the urging force of the back spring 48.

  Here, since the link mechanism 50, the tumbler 30, and the like are not involved in the relative rotation of the sleeve 12 with respect to the rotor case 11, the configuration is simplified as compared with the related art. Moreover, since the components other than the link plate 52 are formed integrally with the rotor 20 and the link plate 52 among the components of the link mechanism 50, the number of components is reduced as compared with the related art.

  Furthermore, the positioning of the component parts such as the link plate 52 of the link mechanism 50 as the connecting means may be performed with respect to the axial center of the rotor 20, and the peripheral surface of the rotor 20 and the sleeve 12 and the component parts as in the prior art. Therefore, there is no need for high-precision alignment such as aligning them with each other, so that the degree of required component accuracy of the component parts of the connecting means is reduced as compared with the prior art. Therefore, the cost can be reduced.

  Further, when the sleeve 12 is displaced relative to the rotor case 11, the moderation ball 24 provided in the sleeve 12 and the moderation groove 16 provided in the rotor case 11 are configured to be engaged and disengaged. Thus, when the rotor 20 rotates independently of the sleeve 12, the sleeve 12 can be prevented from rotating following the rotor 20, and the sleeve 20 is rotated integrally with the sleeve 12. A decrease in rotational performance can be suppressed.

  In this embodiment, when the sleeve 12 is displaced rearward, the moderation ball 24 is separated from the moderation groove 16. However, when the sleeve 12 rotates with a predetermined torque, the moderation ball 24 is moved into the moderation groove 16. It is good also as a structure detached | separated from.

  In this embodiment, the moderation ball 24 (second engaging portion) is provided in the sleeve 12 and the moderation groove 16 (second engaged portion) is provided in the rotor case 11. 16 may be provided on the sleeve 12 and the moderation ball 24 may be provided on the rotor case 11.

  Further, in this embodiment, the boss 56 (first engaging portion, protrusion) is provided in the rotor 20 and the long hole 52B (first engaged portion) is provided in the link plate 52. The hole 52B may be provided in the rotor 20 and the boss 56 may be provided in the link plate 52.

(A), (B) is sectional drawing (1-1 line sectional drawing of FIG. 3) seen from the side which shows the key cylinder which concerns on embodiment of this invention. It is sectional drawing seen from the side which shows the state by which insertion members other than a regular key were inserted in the rotor in the key cylinder which concerns on embodiment of this invention. It is the front view seen from the front which shows the key cylinder which concerns on embodiment of this invention. It is sectional drawing (4-4 sectional view taken on the line of FIG. 1) seen from the front which shows the key cylinder which concerns on embodiment of this invention. It is sectional drawing seen from the front which shows the key cylinder which concerns on embodiment of this invention (5-5 sectional drawing of FIG. 1). FIG. 6 is a cross-sectional view (cross-sectional view taken along line 6-6 in FIG. 1) showing the key cylinder according to the embodiment of the present invention from the front. It is the front view seen from the back which shows the key cylinder which concerns on embodiment of this invention. It is the front view seen from the back which shows the key cylinder which concerns on embodiment of this invention. It is the front view seen from the back which shows the key cylinder which concerns on embodiment of this invention.

Explanation of symbols

10 Key cylinder 11 Rotor case (second container)
12 Sleeve (first container)
14 Slit (limitation means)
16 Moderation groove (second engaged part)
20 rotor 24 moderation ball (biasing means, contact part)
26 Compression coil spring (biasing means)
30 tumblers (limitation means)
38 Regular key
50 Link mechanism (connecting means)
52 Link plate (link member)
52B long hole (first engaged portion)
52C circular hole (connection point)
54 Rotating shaft 56 Boss (first engaging portion, protrusion)
58 cable (operation target)

Claims (4)

A rotor formed with an insertion hole into which a key is inserted;
A first housing for rotatably housing the rotor;
A second container for rotatably accommodating the first container;
Limiting means for enabling relative rotation of the rotor with respect to the first container in a state in which the key is inserted into the insertion hole, and disabling in a state in which the key is not inserted in the insertion hole;
The rotor is coupled to the first container so as to be relatively rotatable, and the rotor and the first container are coupled to an operation object, and the operation of the operation object is performed by the rotor. Connecting means that enables if the rotor rotates relative to the rotor, and disables if the rotor does not rotate relative to the first container;
A key cylinder comprising: The connecting means is
A link member supported by the first container so as to be rotatable about a rotation axis substantially parallel to the rotation axis of the rotor;
A first engagement portion provided on the rotor or the link member;
A first engaged portion provided on the link member or the rotor, the first engaging portion being slidably engaged;
The link member is provided at a non-support end side with respect to the engaged portion or the engaging portion, and at a position overlapping the axial center of the rotor in a state where the rotation of the rotor by the key is not performed, A connection point to which the operation target is connected, and
The key cylinder according to claim 1, comprising: The first engaging portion is a protrusion;
The key cylinder according to claim 2, wherein the first engaged portion is a long hole into which the protrusion is slidably inserted. A second engagement portion provided in the first container or the second container;
A second engaged member provided in the second container or the first container, wherein the second engaging portion is engaged and disengaged by relative displacement of the first container with respect to the second container. With the joint,
The key cylinder according to any one of claims 1 to 3, wherein the key cylinder is provided.

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