JP2005336885A - Protective device of vehicular cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective device of a vehicular cylinder lock capable of minimizing an operation load of a rotor, while forming a shutter plate of a high strength material. <P>SOLUTION: An interlocking driving means 48 operates the shutter plate 24 by interlocking with rotational operation of the rotor 26 while transmitting operation force to the shutter plate 24 from the rotor 28 only in a predetermined transmission range set in a rotational operation range of the rotor between a closing operation position and an opening operation position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is accommodated in a casing having an insertion hole corresponding to a key hole of a cylinder lock, a closed position for closing the insertion hole, and an open position for opening the insertion hole. The rotor has a shutter plate and a fitting recess in which the magnet key can be removably fitted, and the magnet key is fitted to the fitting recess between the closing operation position and the opening operation position of the rotor. A magnetic lock disposed on the casing so as to allow a rotating operation, and the shutter plate is moved to the closed position and the closed position according to a rotating operation between the closing operation position and the opening operation position of the rotor. The present invention relates to a protection device for a cylinder lock for a vehicle which is operated between open positions.

Conventionally, such a cylinder lock protection device is already known, for example, in Patent Document 1. In this device, the rotor of the magnetic lock is formed separately from the shutter plate, so that the shutter plate material and The degree of freedom in selecting the manufacturing method is increased, the shutter plate can be formed of a high-strength material, and the rotational operation force of the rotor is transmitted to the shutter plate via a link mechanism.
JP 2003-161061 A

  However, in the above-mentioned conventional one, since the rotor and the shutter plate are always connected via the link mechanism, the number of components that operate following the rotation of the rotor when the driver rotates the rotor. Becomes relatively large, and the operation load of the rotor becomes relatively large.

  The present invention has been made in view of such circumstances, and provides a protection device for a cylinder lock for a vehicle that can form a shutter plate with a high-strength material and can keep the operation load of a rotor small. With the goal.

  In order to achieve the above object, an invention according to claim 1 is provided between a casing having an insertion hole corresponding to a key hole of a cylinder lock, a closed position for closing the insertion hole, and an open position for opening the insertion hole. A shutter plate housed in the casing and a rotor provided with a fitting recess into which the magnet key can be removably fitted, and when the magnet key is fitted into the fitting recess. And a magnet lock disposed on the casing so as to allow a rotation operation between the closing operation position and the opening operation position of the rotor, and a rotation operation between the closing operation position and the opening operation position of the rotor. In the vehicular cylinder lock protecting apparatus, the shutter plate is operated between the closed position and the open position in response to the closing operation position. And the rotation operation of the rotor with respect to the shutter plate while enabling the operation force to be transmitted from the rotor to the shutter plate only within a predetermined transmission range set within the rotation operation range of the rotor between the opening operation positions. It is characterized by including interlocking driving means for operating in conjunction with the motor.

  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, the interlocking drive means can transmit the operating force from the rotor to the shutter plate only within the predetermined transmission range. A cam mechanism provided between the shutter plates; and when the shutter plate passes from one of the closed position and the open position to an intermediate position between the closed position and the open position, the shutter plate is attached to the other. It is comprised by the operation assistance mechanism provided between the said shutter board | plate and the said casing so that it may energize.

  According to a third aspect of the invention, in addition to the configuration of the second aspect of the invention, the operation assisting mechanism includes a cam surface provided on one of the shutter plate and the casing, and a spring on a side in contact with the cam surface. And a ball member that is urged and held on the other of the shutter plate and the casing, and the cam surface is located on either side along the operation direction between the closed position and the open position of the shutter plate. It is characterized by having a pair of inclined surfaces that allow the ball member to rise as it goes to the intermediate position.

  According to a fourth aspect of the invention, in addition to the configuration of the second aspect of the invention, the shutter plate is supported by the casing so as to be rotatable about an axis parallel to the rotation axis of the rotor, and the cam mechanism. Is composed of a protrusion provided on the rotor so as to protrude toward the shutter plate, and a recess provided on the shutter plate so that the protrusion can be engaged with the protrusion in the circumferential direction of the shutter plate. The width of the concave portion along is set larger than the width of the protrusion so as to avoid engagement with the protrusion when the rotor is in the closing operation position and the opening operation position. .

  According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the invention, the range of rotation between the closed position and the open position of the shutter plate is between the closed operation position and the open operation position of the rotor. It is characterized by being set smaller than the rotation range at.

  In addition to the configuration of the invention according to claim 4, the invention according to claim 6 is configured such that the rotor is embedded in a rotor main portion made of a synthetic resin, the first metal member provided with the protrusion. The shutter plate is formed by embedding a second metal member disposed in a portion closing the insertion hole and a third metal member provided with the recess in a shutter plate main portion made of a synthetic resin. And

  According to the first aspect of the present invention, when the rotor is rotated between the closing operation position and the opening operation position, the operation force is applied from the rotor to the shutter plate only within a predetermined transmission range within the rotation operation range of the rotor. Since the shutter plate is operated between the closed position and the open position by the interlock driving means, the operation load of the rotor until the operation force is transmitted from the rotor to the shutter plate is reduced, and the rotor When operating force is transmitted to the shutter plate, it is possible to obtain a good operational feeling by making the operation feel firmly, and by forming the rotor separately from the shutter plate, high strength material The shutter plate can be formed with

  According to the second aspect of the invention, since the shutter plate is urged toward the closed position or the open position by the operation assisting mechanism when the rotor is operated, the operation load of the rotor is further reduced in combination with the effect of the cam mechanism. .

  According to the third aspect of the present invention, the shutter plate can be urged toward the closed position or the open position when the rotor is operated by the operation assisting mechanism having a simple configuration.

  According to the fourth aspect of the present invention, when the rotor is rotated between the closing operation position and the opening operation position, the operating force is applied from the rotor to the shutter plate only within a predetermined transmission range within the rotation operation range. It is possible to simply configure a cam mechanism that transmits the above.

  According to the invention described in claim 5, since the rotation operation of the rotor between the closing operation position and the opening operation position becomes easy, and it is advantageous for the setting of the magnet with the magnet lock, the magnet lock has a compact design. Is possible.

  Further, according to the sixth aspect of the invention, the insertion hole can be reliably closed by the shutter plate and the durability of the cam mechanism can be enhanced while reducing the weight and reducing the operation load.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 7 show an embodiment of the present invention, and FIG. 1 is a longitudinal side view of a cylinder lock protection device in a state before a shutter plate is in a closed position and a magnetic key is fitted. FIG. 2 is a sectional view taken along line 1-1 of FIG. 3, FIG. 2 is a longitudinal side view of the protection device for the cylinder lock in a state where the shutter plate is in the closed position and the magnet key is fitted, and FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 1, FIG. 5 is a cross-sectional view corresponding to FIG. 4 in a state where the shutter plate is in the open position, and FIG. 6 is a sectional view taken along line 6-6, and FIG. 7 is a sectional view taken along line 7-7 in FIG.

  1 and 2, a cylinder body 16 of a cylinder lock 15 for a vehicle such as a motorcycle is provided on a head pipe (not shown) of a vehicle body frame. It is covered with a casing 18 fixed to the side. The casing 18 includes a case member 19 made of a nonmagnetic material attached to the front end of the cylinder body 16 and a cover member 20 made of a nonmagnetic material attached to the case member 19.

  Referring also to FIG. 3, the casing 18 is provided with an insertion hole 21 corresponding to the key hole 17 disposed at the center of the front end of the cylinder lock 15. The insertion hole 21 is composed of through holes 22 and 23 provided coaxially in the case member 19 and the cover member 20, respectively, and the outer end portion of the through hole 23 is provided to facilitate insertion of a key (not shown). It is formed in a tapered shape.

  4 and 5 together, the casing 18 has a closed position for closing the insertion hole 21 (position in FIG. 4) and an open position for opening the insertion hole 21 (position in FIG. 5). A shutter plate 24 that can rotate between the two is housed.

  The rotation operation of the shutter plate 24 is permitted by fitting the magnet key 28 as shown in FIG. 2 into the fitting recess 27 provided in the magnet lock 25 disposed in the casing 18. The magnet lock 25 includes a rotor 26 formed separately from the shutter plate 24, and the fitting recess 27 is provided in the rotor 26.

  The case member 19 of the casing 18 is integrally provided with a support protrusion 29 having a circular cross section that protrudes toward the cover member 20, and an opening is formed in the cover member 20 at a portion corresponding to the support protrusion 29. 30 is provided.

  The rotor 26 is formed by embedding a first metal member 32 in a part of a rotor main portion 31 made of a synthetic resin, and the support protrusion 29 is fitted in a central portion of the rotor main portion 31. A support recess 33 is provided, and the rotor 26 is rotatably supported by the support protrusion 29 so that the O-ring 34 is interposed between the support protrusion 29 and the outer end of the rotor 26 is the opening. 30 so as to face 30.

  By the way, the fitting recess 27 of the rotor 26 is formed to have, for example, an irregular octagonal cross-sectional shape, and a protrusion 35 is provided at a substantially central portion of the fitting recess 27. Thus, only the magnet key 28 having a cross-sectional shape corresponding to the cross-sectional shape of the fitting recess 27 and having the recess 36 into which the protrusion 35 is fitted can be fitted into the fitting recess 27.

  Referring also to FIG. 6, a plurality of, for example, four sliding recesses 37 corresponding to, for example, square corners are opened at the tip of the support protrusion 29 so as to open to the rotor 26 side. A rod-like permanent magnet 38 is slidably fitted in each sliding recess 37 so that the magnetic pole arrangement on the rotor 26 side is in an appropriate combination. .. Are interposed between the bottom portions of the... And the permanent magnets 38.

  On the other hand, at the closed end of the support recess 33 in the rotor 26, there are provided engagement recesses 40 for engaging a part of the permanent magnets 38, and a part of the permanent magnets 38 is an engagement recess. In the state of being engaged with 40..., The rotation operation of the rotor 26 is prevented.

  On the other hand, the magnet key 28 has a plurality of, for example, four receiving recesses 41 disposed at positions corresponding to the positions of the permanent magnets 38 disposed on the support protrusion 29. The bar-shaped permanent magnets 42 are accommodated in the accommodating recesses 41, respectively. Moreover, the open end of each accommodation recessed part 41 ... is closed with the obstruction | occlusion board 43 made from a nonmagnetic material fixed to the magnet key 28. FIG.

  Each permanent magnet 42 disposed on the magnet key 28 has a receiving recess 41 such that the same magnetic pole as the magnetic pole on the rotor 26 side of each permanent magnet 38 on the support protrusion 29 side is disposed on the rotor 26 side. When the regular magnet key 28 is fitted in the fitting recess 27, as shown in FIG. 2, the permanent magnet 38 on the support projection 29 side is caused by the repulsive force of the same magnetic pole. Are pushed into the sliding recesses 37 so as to be disengaged from the engaging recesses 40 against the spring force of the springs 39, thereby allowing the rotor 26 to rotate. Thus, the first metal member 32 that constitutes a part of the rotor 26 is integrally provided with a rod-shaped grip 32 a protruding from the casing 18, and the rotor 26 is rotated by gripping the grip 32 a. The opening 30 is formed to allow the grip 32 a to rotate with the rotor 26.

  The shutter plate 24 can be rotated around an axis parallel to the rotation axis of the rotor 26 between the closed position shown in FIG. 4 and the open position shown in FIG. The second and third metal members 45 and 46 are sandwiched between the cover members 20 and embedded in a shutter plate main portion 44 made of synthetic resin.

  The second metal member 45 is embedded in the shutter plate main portion 44 so as to be disposed in a portion that closes the insertion hole 21, and is formed in a disk shape larger than the insertion hole 21. Further, the third metal member 46 is integrally provided with a support shaft portion 46 a for rotatably supporting the shutter plate 24 on the casing 18.

  The rotor 26 can be rotated between a closing operation position shown in FIG. 4 and an opening operation position shown in FIG. 5, and the shutter plate 24 is interlocked with the rotation operation of the rotor 26. Is rotated by the interlocking drive means 48.

  The interlocking drive means 48 transmits the operation force from the rotor 26 to the shutter plate 24 only within a predetermined transmission range set within the rotation operation range of the rotor between the closing operation position and the opening operation position. The shutter plate 24 is operated in conjunction with the rotation operation of the rotor 26 while enabling the operation force to be transmitted from the rotor 26 to the shutter plate 24 only within the predetermined transmission range. And a cam mechanism 49 provided between the shutter plates 24, and the shutter plate 24 from one of the closed position and the open position toward the other when passing through an intermediate position between the closed position and the open position. Provided between the shutter plate 24 and the casing 18 so as to urge the shutter plate 24. Composed of the dynamic auxiliary mechanism 50.

  The cam mechanism 49 protrudes toward the shutter plate 24 and is integrally provided on the first metal member 32 of the rotor 26, and the shutter plate can be engaged with the protrusion 51. 24 and the recess 52 provided in the third metal member 46. The width of the recess 52 along the circumferential direction of the shutter plate 24 is such that the protrusion 26 is in the state where the rotor 26 is in the closing operation position and the opening operation position. It is set to be larger than the width of the protrusion 52 so as to avoid engagement with the protrusion 52. In addition, a rotation range between the closed position and the open position of the shutter plate 24 is set to be smaller than a rotation range between the close operation position and the open operation position of the rotor 26. The rotation range between the closing operation position and the opening operation position is 25 °, for example, whereas the rotation range between the closing position and the opening position of the shutter plate 24 is 45 °, for example.

  Referring also to FIG. 7, the operation assisting mechanism 50 includes a cam surface 53 provided on one of the shutter plate 24 and the casing 18 and a spring biased to a side in contact with the cam surface 53, so that the shutter In this embodiment, the cam surface 53 is provided on the case member 19 of the casing 18, and the ball member 54 is a shutter. It is held on the plate 24.

  The cam surface 53 has a pair of slopes that allow the ball member 54 to be raised from either side along the direction of operation between the closed position and the open position of the shutter plate 24 toward the intermediate position. It has the surface 53a, 53b. The ball member 54 is slidably held in a bottomed holding hole 55 provided in the shutter plate main portion 44 of the shutter plate 24, and a spring 56 is contracted between the closed end of the holding hole 55 and the ball member 54. Is done.

  According to such interlocking drive means 48, when the rotor 26 is rotated counterclockwise in FIG. 4 from the state of FIG. 4 in which the rotor 26 is in the closing operation position toward the opening operation position, the rotor is rotated by a predetermined angle. 26 rotates independently. Thereafter, after the protrusion 51 comes into contact with one side surface of the recess 52, the rotor 26 rotates while rotating the shutter plate 24 from the closed position to the open position in the clockwise direction in FIG. During this time, the ball member 54 moves up the inclined surface 53 a of the cam surface 53 in the operation assisting mechanism 50. Thus, after the ball member 54 reaches the connecting portion of the inclined surfaces 53a and 53b, the shutter plate 24 is urged by the spring force of the spring 56 that has been compressed so that the ball member 54 moves down the inclined surface 53b. As a result, the shutter plate 24 automatically rotates to the open position shown in FIG. Further, when the rotor 26 is rotated in the clockwise direction in FIG. 5 from the state of FIG. 5 in which the rotor 26 is in the opening operation position toward the closing operation position, the rotor 26 is rotated independently by a predetermined angle, and thereafter After the portion 51 comes into contact with the other side surface of the recess 52, the rotor 26 rotates while rotating the shutter plate 24 from the open position to the closed position in the counterclockwise direction of FIG. Then, the ball member 54 goes up the inclined surface 53 b of the cam surface 53. Thus, after the ball member 54 reaches the connecting portion of the inclined surfaces 53b and 53a, the shutter plate 24 is urged by the spring force of the spring 56 that has been compressed so that the ball member 54 moves down the inclined surface 53a. As a result, the shutter plate 24 automatically rotates to the closed position shown in FIG.

  A click mechanism 57 that determines the rotation limit of the rotor 26 is provided between the case member 19 of the casing 18 and the rotor 26, and the click mechanism 57 is integrated with the outer periphery of the rotor main portion 31 in the rotor 26. A bottomed storage hole 59 provided in the case member 19 so as to open facing the flange 31a provided in the ball member, a ball member 60 slidably fitted in the storage hole 59, and the ball A spring 61 accommodated in the accommodation hole 59 so as to exert a spring force that urges the member 60 toward the flange portion 58 side is engaged with the ball member 60 when the rotor 26 is in the closing operation position. An engagement groove 62 provided in the flange 31a, and an engagement groove 63 provided in the flange 31b so as to engage the ball member 60 when the rotor 26 is in the opening operation position. Provided.

  Further, the cover member 20 in the casing 18 is in contact with the grip portion 32 a of the first metal member 32 to regulate the rotation end of the rotor 26 on the closing operation position side, and the flange portion of the rotor main portion 31 in the rotor 26. A stopper 64 that abuts 31 a and restricts the rotational end of the rotor 26 on the opening operation position side is integrally provided, and the structure that restricts the rotational end of the rotor 26 is provided with the cover member 20 of the stopper 64. It is possible to form a compact by integral molding.

  Next, the operation of this embodiment will be described. The shutter plate 24 accommodated in the casing 18 is capable of rotating between a closed position for closing the insertion hole 21 of the casing 18 and an open position for opening the insertion hole 21. However, the operation force from the rotor 26 is transmitted to the shutter plate 24 only within a predetermined transmission range set within the rotation operation range of the rotor 26 between the closing operation position and the opening operation position. Since it is rotated by the interlocking drive means 48 according to the rotation operation, the operation load of the rotor 26 until the operation force is transmitted from the rotor 26 to the shutter plate 24 is reduced, and the rotor 26 is moved from the shutter plate 24 to the shutter plate 24. When the operation force is transmitted, it is possible to obtain a good operation feeling by making the operation feel firmly.

  In addition, the interlocking drive means 48 can transmit the operating force from the rotor 26 to the shutter plate 24 only within the predetermined transmission range, and the cam mechanism 49 provided between the rotor 26 and the shutter plate 24, and the shutter plate 24 is in the closed position and the open position. An operation assist mechanism 50 provided between the shutter plate 24 and the casing 18 so as to urge the shutter plate 24 toward the other when passing through an intermediate position between the closed position and the open position from one of the positions. Therefore, when the rotor 26 is operated, the shutter plate 24 is biased toward the closed position or the open position by the operation assist mechanism 50, and the operation load of the rotor 26 is further reduced in combination with the effect of the cam mechanism 49. Will be.

  In addition, the operation assisting mechanism 50 is spring-biased by a cam surface 53 provided on one of the shutter plate 24 and the casing 18 (in this embodiment, the case member 19 of the casing 18) and a side in contact with the cam surface 53. The plate member 24 and the ball member 54 held by the other of the casing 18 (the shutter plate 24 in this embodiment), and the cam surface 53 extends along the operation direction between the closed position and the open position of the shutter plate 24. It has a simple configuration having a pair of inclined surfaces 53a and 53b so that the ball member 54 can be raised from either side toward the intermediate position. By the operation assisting mechanism 50 having such a simple configuration, When the rotor 26 is operated, the shutter plate 24 can be urged toward the closed position or the open position.

  The shutter plate 24 is supported on the casing 18 so as to be rotatable about an axis parallel to the rotation axis of the rotor 26, and the cam mechanism 49 projects to the rotor 26 so as to protrude toward the shutter plate 24. The protrusion 51 is provided, and the recess 52 is provided in the shutter plate 24 so that the protrusion 51 can be engaged. The width of the recess 52 along the circumferential direction of the shutter plate 24 is such that the rotor 26 is in the closing operation position. Since it is set to be larger than the width of the protrusion 51 so as to avoid the engagement with the protrusion 51 in the open operation position, the rotor 26 is rotated between the close operation position and the open operation position. Sometimes, the cam mechanism 49 that allows the operation force to be transmitted from the rotor 26 to the shutter plate 24 only within a predetermined transmission range within the rotation operation range is simply configured. Rukoto can.

  In addition, the rotation range between the closing position and the opening position of the shutter plate 24 is set to be smaller than the rotation range between the closing operation position and the opening operation position of the rotor 26, and therefore between the closing operation position and the opening operation position. The rotation operation of the rotor 26 becomes easy and is advantageous for the setting of the permanent magnets 38... With the magnet lock 25, so that a compact design of the magnet lock 25 is possible.

  Further, the rotor 26 is formed by embedding a first metal member 32 provided with a projection 51 in a rotor main portion 31 made of a synthetic resin, and the shutter plate 24 is disposed at a portion where the insertion hole 21 is closed. Since the metal member 45 and the third metal member 46 provided with the recess 52 are embedded in the shutter plate main portion 44 made of synthetic resin, the shutter plate can be reduced in weight and reduced in operating load. Thus, the insertion hole 21 can be reliably closed by the 24, and the durability of the cam mechanism 49 can be enhanced.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

FIG. 4 is a longitudinal side view of the cylinder lock protection device in a state before the shutter key is in the closed position and fitted with the magnet key, and is a cross-sectional view taken along line 1-1 of FIG. 3. It is a vertical side view of the protection device of the cylinder lock in a state where the shutter plate is in the closed position and the magnet key is fitted. FIG. 3 is a view taken along line 3-3 in FIG. 1. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a cross-sectional view corresponding to FIG. 4 in a state where the shutter plate is in an open position. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 4.

Explanation of symbols

15 ... cylinder lock 17 ... key hole 18 ... casing 21 ... insertion hole 24 ... shutter plate 25 ... magnet lock 26 ... rotor 27 ... fitting recess 28 ... Magnet key 31 ... rotor main part 32 ... first metal member 44 ... shutter plate main part 45 ... second metal member 46 ... third metal member 48 ... interlocking drive means 49 ... Cam mechanism 50 ... Operation assist mechanism 51 ... Projection 52 ... Recess 53 ... Cam surfaces 53a, 53b ... Inclined surface 54 ... Ball member

Claims (6)

  A casing (18) having an insertion hole (21) corresponding to the key hole (17) of the cylinder lock (15), a closed position for closing the insertion hole (21), and an open position for opening the insertion hole (21) A rotor (26) provided with a fitting recess (27) into which a shutter plate (24) housed in the casing (18) and a magnet key (28) can be removably fitted is provided. ) And the casing () so as to allow the rotor (26) to rotate between the closing operation position and the opening operation position when the magnet key (28) is fitted to the fitting recess (27). 18), and the shutter plate (24) is closed according to the rotation operation between the closing operation position and the opening operation position of the rotor (26). In the vehicular cylinder lock protecting apparatus that operates between the position and the open position, a predetermined transmission set within a rotation operation range of the rotor (26) between the close operation position and the open operation position. Interlocking drive means for operating the shutter plate (24) in conjunction with the rotation operation of the rotor (26) while enabling transmission of the operating force from the rotor (26) to the shutter plate (24) only within a range. 48) a cylinder lock protecting device for a vehicle.   The interlocking drive means (48) is provided between the rotor (26) and the shutter plate (24) so as to be able to transmit an operating force from the rotor (26) to the shutter plate (24) only within the predetermined transmission range. Cam mechanism (49) and the shutter plate (24) from one of the closed position and the open position to the other when passing through an intermediate position between the closed position and the open position. The cylinder lock for a vehicle according to claim 1, comprising an operation assisting mechanism (50) provided between the shutter plate (24) and the casing (18) so as to urge the shutter plate (24). Protective device.   The operation assisting mechanism (50) is spring-biased by a cam surface (53) provided on one of the shutter plate (24) and the casing (18) and a side in contact with the cam surface (53). And a ball member (54) held on the other of the shutter plate (24) and the casing (18), and the cam surface (53) is between the closed position and the open position of the shutter plate (24). 3. A pair of inclined surfaces (53a, 53b) configured to raise the ball member (54) toward an intermediate position from either side along an operation direction at a point. Protection device for cylinder locks for vehicles.   The shutter plate (24) is supported by the casing (18) so as to be rotatable about an axis parallel to the rotation axis of the rotor (26), and the cam mechanism (49) is supported by the shutter plate (24). A protrusion (51) provided on the rotor (26) so as to protrude toward the side, and a recess (52) provided on the shutter plate (24) so that the protrusion (51) can be engaged. And the width of the recess (52) along the circumferential direction of the shutter plate (24) is such that the rotor (26) is engaged with the protrusion (51) in the closed operation position and the open operation position. 3. The vehicular cylinder lock protection device according to claim 2, wherein the protection device is set to be larger than the width of the protrusion (51).   A rotation range between the closed position and the open position of the shutter plate (24) is set to be smaller than a rotation range between the close operation position and the open operation position of the rotor (26). The protection device for a cylinder lock for a vehicle according to claim 4.   The rotor (26) is formed by embedding a first metal member (32) provided with the protrusion (51) in a rotor main part (31) made of synthetic resin, and the shutter plate (24) Shutter plate main portion (44) made of synthetic resin, the second metal member (45) disposed in the portion closing the insertion hole (21) and the third metal member (46) provided with the recess (52). 5. The protection device for a cylinder lock for a vehicle according to claim 4, wherein the protection device is a cylinder lock.

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