JP2003056219A - Protective device for cylinder lock for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability in a protective device for a cylinder lock for a car with a casing with an inserting hole corresponding to a key hole for the cylinder lock, a shutter plate housed in the casing, enabling operation between the place of closing where the inserting hole is closed and the place of opening where the inserting hole is opened and a magnet lock having a fitting recessed section, in which a magnet key can be fitted in a manner that the magnet key can be inserted and detached, while being disposed to the casing so that the operation of the shutter plate from the closing place to the open place is permitted in the case of fitting the magnet key into the fitting recessed section. SOLUTION: An urging spring 48 in the closing direction urging the shutter plate 24A on the closing-place side is installed between the shutter plate 24A and the casing 18A, and an opening-place holding means 52 capable of holding the shutter plate 24A at an open place against the resilient force of the urging spring 48 is secured to the casing 18A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables operation 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 fitting recess into which the magnet key can be removably fitted, and a magnet key to move the shutter plate from the closed position to the open position into the fitting recess. The present invention relates to a vehicle cylinder lock protection device, which is provided with a magnet lock which is disposed in the casing so as to be allowed when the lock is fitted.

[0002]

2. Description of the Related Art Conventionally, such a device is disclosed in, for example, Japanese Unexamined Patent Application Publication No.
It is already known in Japanese Patent Application Laid-Open No. 00-104426.

[0003]

However, in the above-mentioned conventional device, in order to operate the shutter plate between the closed position and the open position, it is necessary to rotate the magnet key fitted in the fitting recess of the magnet lock. However, it is hard to say that it has excellent operability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle cylinder lock protection device having improved operability.

[0005]

In order to achieve the above object, the invention according to claim 1 has a casing having an insertion hole corresponding to a key hole of a cylinder lock, a closed position for closing the insertion hole, and the above. A shutter plate that can be operated between open positions that open the insertion hole and that is housed in the casing, and a fitting recess that allows the magnet key to be removably fitted, and a shutter plate from the closed position to the open position. A protection device for a vehicle cylinder lock, comprising: a magnet lock disposed in the casing so as to allow the operation of the shutter plate when the magnet key is fitted into the fitting recess, wherein the shutter plate and the casing are provided. A closing direction biasing spring for biasing the shutter plate toward the closing position is provided between the shutter plate and the spring force of the closing direction biasing spring. Open position holding means capable of holding at the open position while resisting, characterized in that is provided in the casing.

According to the structure of the invention described in claim 1, the shutter plate is biased toward the closed position by the biasing spring in the closing direction and the shutter plate is in the open position when the open position holding means is used. Since it is held, when the shutter plate is in the open position and the operation of releasing the holding of the shutter plate by the open position holding means is performed, the shutter plate is lightly operated from the open position to the closed position without the need of the magnetic key. It is possible to improve the operability.

Further, in order to achieve the above-mentioned object, claim 2
According to the invention described in the above, a casing having an insertion hole corresponding to a key hole of a cylinder lock, and a housing which is operable between a closed position for closing the insertion hole and an open position for opening the insertion hole are housed in the casing. Shutter plate,
The casing has a fitting recess into which the magnet key can be removably fitted, and allows the operation of the shutter plate from the closed position to the open position when the magnet key is fitted into the fitting recess. In a protection device for a vehicle cylinder lock including a magnet lock disposed on a shutter plate, an opening direction urging spring that urges the shutter plate toward the opening position side is provided between the shutter plate and the casing, and the shutter plate is provided. The casing is provided with a closed position holding means capable of holding at a closed position against the spring force of the opening direction urging spring.

According to the structure of the second aspect, the shutter plate is biased to the open position side by the opening direction biasing spring, and the shutter plate is in the closed position by the closed position holding means. Since the shutter plate is held, the magnet key is fitted into the fitting recess when the shutter plate is in the closed position so that the shutter plate is allowed to operate toward the open position and is held by the closed position holding means. When the release operation is performed, the shutter plate can be lightly operated from the closed position to the open position side, and the operability can be improved.

Further, in addition to the configuration of the invention according to claim 1 or 2, the invention according to claim 3 is such that the magnet lock is formed separately from the shutter plate and the fitting recess is provided. It is characterized in that the shutter plate is interlocked and connected to the rotor. According to such a configuration, the shutter plate can be made of a material different from that of the rotor, and the material of the shutter plate can be selected. The degree of freedom is increased, and it becomes possible to form the shutter plate from an inexpensive and high-strength pressed steel plate or the like.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.

1 to 6 show a first embodiment of the present invention. FIG. 1 shows a cylinder lock protection device in a state where the shutter plate is in the closed position and before the magnet key is fitted. 3 is a vertical side view of FIG. 3 and is a sectional view taken along line 1-1 of FIG.
2 is a vertical sectional side view of the cylinder lock protection device 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 the line 3-3 in FIG. 1, and FIG. 4 is a cover member. 4 is a view taken along the line 4-4 in FIG.
5 is a sectional view taken along line 5-5 of FIG. 6, and FIG. 6 is a view corresponding to FIG. 4 in a state where the shutter plate is at the open position.

First, referring to FIGS. 1 and 2, a cylinder body 16 of a cylinder lock 15 for a vehicle, for example, a motorcycle.
Is provided on a head pipe (not shown) of the vehicle body frame, and the front end portion of the cylinder body 16 is covered with a casing 18A fixed to the vehicle body frame side. The casing 18A includes a case member 19A made of a non-magnetic material attached to the front end portion of the cylinder body 16, and a cover member 20 made of a non-magnetic material attached to the case member 19A.

Referring also to FIG. 3, the casing 18A
The cylinder lock 15 is provided with an insertion hole 21 corresponding to the key hole 17 arranged in the central portion of the front end. This insertion hole 2
1 is composed of through holes 22 and 23 provided coaxially in the case member 19A and the cover member 20, respectively,
The outer end of the through hole 23 is formed in a tapered shape to facilitate insertion of a key (not shown).

Further referring to FIGS. 4 and 5 together,
A shutter plate 24A is housed in the casing 18A and is rotatable between a closed position for closing the insertion hole 21 and an open position for opening the insertion hole 21.

When the shutter plate 24A is rotated, as shown in FIG. 2, the magnet key 28 is inserted into the fitting recess 27 provided in the magnet lock 25 arranged in the casing 18A.
The magnet lock 25 includes a rotor 26 that is formed separately from the shutter plate 24A, and the rotor 26 is provided with the rotor 26.
7 is provided.

The case member 19A of the casing 18A is integrally provided with a supporting projection 29 having a circular cross section and projecting toward the cover member 20. The portion corresponding to the supporting projection 29 is attached to the cover member 20. Is provided with a circular opening 30.

The rotor 26 is formed of a non-magnetic material into a substantially cylindrical shape having an opposed wall portion 26a facing the tip of the support projection 29 at an axially intermediate portion, and an O-ring 33.
The support protrusion 2 by interposing the support protrusion 29 with the base of the support protrusion 29.
The rotor 26 is rotatably supported, and the outer end of the rotor 26 is arranged so as to face the opening 30.

The shutter plate 24A is provided with an insertion hole 34 through which the rotor 26 is inserted. This insertion hole 34
Comprises a large-diameter hole portion 34a on the case member 19A side and a small-diameter hole portion 34b on the cover member 20 side coaxially connected to each other. An annular step is formed between the large-diameter hole portion 34a and the small-diameter hole portion 34b. The part 34c is formed. On the other hand, an annular step portion 26b facing the annular step portion 34c is provided on the outer circumference of the rotor 26, and the case member 19A and the cover member 20 are provided.
The annular stepped portion 34c of the shutter plate 24A, which is rotatably held between the annular stepped portion 34b and the annular stepped portion 26b of the rotor 26, are brought into sliding contact with each other, so that the rotor 26 is prevented from being separated from the casing 18A.

By the way, the fitting recess 27 of the rotor 26
Is formed so as 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 the cross-sectional shape corresponding to the cross-sectional shape of the fitting concave portion 27 and having the concave portion 36 into which the protrusion 35 is fitted can be fitted into the fitting concave portion 27.

A plurality of, for example, four sliding recesses 37 ... Corresponding to the corners of a square, for example, are provided at the tip of the support projection 29 so as to open toward the rotor 26 side. Rod-shaped permanent magnets 38 are slidably fitted in the sliding recesses 37 so that the magnetic pole arrangement on the rotor 26 side is an appropriate combination, and the bottoms of the sliding recesses 37 ... Between the magnets 38, springs 39 that bias the respective permanent magnets 38 ... toward the side where the permanent magnets 38 project from the tips of the support protrusions 29 are interposed.

The facing wall portion 26a of the rotor 26 is provided with engagement recesses 40 ... For engaging a part of each of the permanent magnets 38 ... And a part of each of the permanent magnets 38 ...
In the state where they are respectively engaged with 0 ..., The rotation operation of the rotor 26 is blocked.

On the other hand, in the magnet key 28, a plurality of, for example, four accommodating recesses 41 ... Arranged at positions corresponding to the arrangement of the permanent magnets 38 arranged on the supporting projection 29.
Are provided so as to open toward the facing wall portion 26a of the rotor 26, and the rod-shaped permanent magnets 42 are provided in the respective accommodation recesses 41.
... are housed respectively. Further, the open ends of the accommodation recesses 41 ... Are closed by a closing plate 43 made of a non-magnetic material and fixed to the magnet key 28.

The permanent magnets 42 arranged in the magnet key 28 are arranged such that the same magnetic poles as the magnetic poles on the rotor 26 side of the permanent magnets 38 on the supporting projection 29 side are arranged 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 magnets on the side of the support projection 29 are repulsed by the repulsive force of the same magnetic pole. The magnet 38 ... is a spring 39 ...
Is pushed into the slide recesses 37 so as to be disengaged from the engaging recesses 40 against the spring force of the rotor 26, whereby the rotational movement of the rotor 26 is allowed.

As clearly shown in FIGS. 4 and 5, an engaging protrusion 44 is provided on the outer periphery of the rotor 26, and the engaging protrusion 44 is inserted through the insertion hole 34 in the shutter plate 24A.
It is engaged with a recess 45 provided on the inner circumference of the. Therefore, when the rotor 26 is allowed to rotate, when the rotor 26 rotates, the shutter plate 24A rotates following the rotor 26, and when the shutter plate 24A rotates, it follows the shutter plate 24A. Then rotor 2
6 rotates.

Moreover, the shutter plate 24A is in a closed position for closing the insertion hole 21 of the casing 18A and protects the cylinder lock 15 (states of FIGS. 1 to 5), and FIG.
It is possible to rotate between the open position where the insertion hole 21 of the casing 18A is opened and the insertion of the key into the key hole 17 of the cylinder lock 15 is allowed, as shown in FIG. Then, each of the permanent magnets 38 of the support protrusion 29 ...
Can be engaged with the engaging recesses 40 of the rotor 26, and the permanent magnets 38 of the supporting protrusions 29 cannot engage with the engaging recesses 40 of the rotor 26 in the open position. Further, the rotation range of the shutter plate 24A and the rotor 26 between the closed position and the open position is defined.

The shutter plate 24A includes a case member 19
An operation pin 46 projecting to the side opposite to A is planted, and the operation pin 46 penetrates a guide hole 47 provided in the cover member 20 and is projected outward. Thus, the guide hole 47 is formed in an arc shape with the rotation axis of the rotor 26 and the shutter plate 24A as the center, and the operation pin 46 is formed in a state where the rotation of the rotor 26 and the shutter plate 24A is allowed. The rotor 26 and the shutter plate 24A can be rotated by pinching and rotating.

Shutter plate 24A and casing 18
A closing direction biasing spring 48 that biases the shutter plate 24A toward the closing position is provided between A, and one end of this closing direction biasing spring 48 is a case member 19A of the casing 18A.
It abuts and engages with the protruding portion 49A protruding from. On the surface of the shutter plate 24A facing the case member 19A side, there is provided a spring accommodation groove 50A formed in an arc shape around the rotation axis of the shutter plate 24A, and one end of this spring accommodation groove 50A. Is the protrusion 49A in response to the movement of the shutter plate 24A from the closed position to the open position.
Is opened toward the side of the protrusion 49A so as to be able to accommodate the. The other end of the spring accommodating groove 50A is closed, and the other end of the closing direction biasing spring 48, which is accommodated in the spring accommodating groove 50A, is abutted against the other end closing portion of the spring accommodating groove 50A. . Further, the case member 19A is provided with a stopper 51 protruding to receive the shutter plate 24A biased toward the closing position by the closing direction biasing spring 48 at the closing position.

The case member 19A of the casing 18A is provided with a leaf spring 52 as an open position holding means capable of holding the shutter plate 24A in the open position against the spring force of the closing direction urging spring 48. It is provided by caulking and connecting one end of the. At the other end of the leaf spring 52, a triangular protrusion 5 protruding toward the shutter plate 24A is formed.
2a is provided, and a locking projection 53 that elastically fits the projection 52a in a state where the shutter plate 24A is in the open position is provided on the outer peripheral portion of the shutter plate 24A.
Thus, in the state where the protrusion 52a is elastically engaged with the locking protrusion 53 (the state of FIG. 6), the shutter plate 24A is urged toward the closing position by the closing direction urging spring 48. Can be held in the open position against the spring force of the closing direction biasing spring 48, and in that state, when a manual operation force to the close position side is applied to the shutter plate 24A, the protrusion 52a The leaf spring 52 can be bent so as to release the elastic engagement with the locking protrusion 53, and the shutter plate 24A can be rotated to the closed position side.

The operation of the first embodiment will now be described. The casing 18A is housed in the casing 18A so as to be operable between a closed position for closing the insertion hole 21 and an open position for opening the insertion hole 21. The shutter plate 24A is biased toward the closed position by the closing direction biasing spring 48, and the state where the shutter plate 24A is in the open position is held by the plate spring 52.

Therefore, when an operation force to the shutter plate 24A is applied to the shutter plate 24A by the operation pin 46 so that the holding of the shutter plate 24A by the leaf spring 52 is released in the state where the shutter plate 24A is in the open position, the magnet is moved. The shutter plate 24A can be lightly operated from the open position to the closed position without using the key 28, and the operability can be improved.

Moreover, the rotor 26 included in the magnet lock 25 is formed separately from the shutter plate 24A, and the rotor 26 and the shutter plate 24A are interlocked and connected, so that the shutter plate 24A is made of a material different from that of the rotor 26. Therefore, the degree of freedom in selecting the material of the shutter plate 24A is increased, and it becomes possible to form the shutter plate 24A from an inexpensive pressed steel plate or the like.

7 to 12 show a second embodiment of the present invention. FIG. 7 shows a cylinder lock protection device in a state where the shutter plate is in the closed position and before the magnetic key is fitted. FIG. 7 is a vertical cross-sectional side view taken along line 7-7 of FIG. 9, and FIG. 8 is a vertical cross-sectional side view of the cylinder lock protection device with the shutter plate in the closed position and the magnetic key fitted. 9 is a view taken along the line 9-9 of FIG. 7, FIG. 10 is a view taken along the line 10-10 of FIG. 7 with the cover member removed, and FIG. 11 is a sectional view taken along the line 11-11 of FIG. 12 is a view corresponding to FIG. 10 when the shutter plate is in the open position.

The second embodiment of the present invention will be described below with reference to FIGS. 7 to 12, but the portions corresponding to the first embodiment shown in FIGS. 7 to 6 are the same. The detailed description will be omitted only with reference numerals.

7 and 8, the front end of the cylinder body 16 of the cylinder lock 15 is covered with a casing 18B fixed to the vehicle body frame side, and the casing 18B is attached to the front end of the cylinder body 16. A case member 19B made of a non-magnetic material, and a cover member 20 made of a non-magnetic material attached to the case member 19B.
It consists of and.

Referring also to FIG. 9, the casing 18B
An insertion hole 21 formed of through holes 22 and 23 provided coaxially in the case member 19B and the cover member 20 is provided corresponding to the key hole 17 of the cylinder lock 15.

Further referring to FIGS. 10 and 11, in the casing 18B, a rotational operation can be performed between a closed position for closing the insertion hole 21 and an open position for opening the insertion hole 21. The shutter plate 24B is housed, and the shutter plate 24B is rotated. As shown in FIG. 8, the magnet key 25 is inserted into the fitting recess 27 provided in the rotor 26 included in the magnet lock 25 provided in the casing 18B. It is allowed by fitting 28, and the rotor 26 is formed separately from the shutter plate 24B.

As clearly shown in FIGS. 10 and 11, an engaging protrusion 44 is provided on the outer periphery of the rotor 26,
The engagement protrusion 44 is engaged with the recess 45 provided on the inner circumference of the insertion hole 34 in the shutter plate 24B. Therefore, in the state where the rotation operation of the rotor 26 is allowed,
When the rotor 26 rotates, the shutter plate 24B rotates following the rotor 26, and the shutter plate 24B
When is rotated, the rotor 26 follows the shutter plate 24B.

Moreover, the shutter plate 24B is in a closed position for closing the insertion hole 21 of the casing 18B and protects the cylinder lock 15 (states of FIGS. 7 to 11), and as shown in FIG. It is possible to rotate the cylinder lock 15 between the open position for opening the insertion hole 21 and the insertion of the key into the key hole 17 of the cylinder lock 15, and the support projections 29 in the closed position. Permanent magnet 3
.. can be engaged with the engaging recesses 40 of the rotor 26, and the permanent magnets 38 of the support projection 29 cannot engage with the engaging recesses 40 of the rotor 26 in the open position. Thus, the amount of rotation of the shutter plate 24B and the rotor 26 between the closed position and the open position is determined.

The shutter plate 24B has a cover member 20.
An operating pin 46 is planted so as to penetrate through a guide hole 47 provided in the rear side and project outward, and when the rotor 26 and the shutter plate 24B are allowed to rotate, the operating pin 46 is pinched and rotated. By operating the rotor 2
6 and the shutter plate 24B can be rotated.

Shutter plate 24B and casing 18
An opening direction urging spring 54 for urging the shutter plate 24B toward the opening position side is provided between B, and one end of the opening direction urging spring 54 has a case member 19B of the casing 18B.
It abuts and engages with the protruding portion 49B protrudingly provided. Further, the surface of the shutter plate 24B corresponding to the case member 19B side can accommodate the protrusion 49B regardless of which position the shutter plate 24B is rotated, and the center of the rotation axis of the shutter plate 24B. An arc-shaped spring accommodating groove 50B is provided so that both ends thereof are closed, and the other end of the opening direction biasing spring 54 accommodated in the spring accommodating groove 50B has a spring accommodating groove 50B. One end is brought into contact with the closed portion.

Further, the case member 19 of the casing 18B
To B, a leaf spring 55 as a closed position holding means capable of holding the shutter plate 24B in the closed position against the spring force of the opening direction urging spring 54 is caulked at one end thereof. Is provided. On the other end side of the leaf spring 55, a triangular protrusion 55a protruding toward the shutter plate 24B is provided, and the protrusion 55a is elastically ejected with the shutter plate 24B in the open position. A locking protrusion 56 to be fitted is provided on the outer peripheral portion of the shutter plate 24B. Thus, in the state where the protrusion 55a is elastically engaged with the locking protrusion 56 (the state of FIG. 11), the opening direction biasing spring 5 is inserted.
Shutter plate 2 biased toward the open position by 4
4B can be held in the closed position against the spring force of the opening direction urging spring 54, and in that state, when a manual operation force to the open position side is applied to the shutter plate 24B, The leaf spring 55 can be bent so as to release the resilient engagement of the portion 55a with the locking projection 56, and thereby the shutter plate 24B can be rotated to the open position side.

According to the second embodiment, the shutter plate 2
4B and the casing 18A, the shutter plate 24B
Is provided in the casing 18B so as to hold the shutter plate 24B in the closed position against the spring force of the opening direction urging spring 54. ing.

Therefore, when the shutter plate 24B is in the closed position, the magnet key 28 is fitted into the fitting recess 27 so that the operation of the shutter plate 24 to the open position side is permitted, and the shutter is operated by the operation pin 46. When an operating force is applied to the plate 24B toward the open position, the shutter plate 24B can be lightly operated from the closed position to the open position, and the operability can be improved.

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

For example, in each of the above-mentioned embodiments, the shutter plates 24A and 24B are rotatably operated between the closed position and the open position, but the shutter plates can be slid linearly between the closed position and the open position. It is also possible to

[0046]

As described above, according to the first aspect of the present invention, when the operation for releasing the holding of the shutter plate by the open position holding means is performed in the state where the shutter plate is in the open position, the magnet key is unnecessary. At the same time, the shutter plate can be lightly operated from the open position to the closed position, and the operability can be improved.

According to the second aspect of the present invention, when the shutter plate is in the closed position, the magnet key is fitted into the fitting recess to permit the shutter plate to be operated toward the open position. In addition, when the operation of releasing the holding by the closed position holding means is performed, the shutter plate can be lightly operated from the closed position to the open position side, and the operability can be improved.

Further, according to the third aspect of the invention, the shutter plate can be formed of a material different from that of the rotor, the degree of freedom in selecting a material for the shutter plate is increased, and an inexpensive and high-strength pressed steel plate or the like is provided. It is also possible to form a shutter plate.

[Brief description of drawings]

FIG. 1 is a first protection device for a cylinder lock in a state in which a shutter plate is in a closed position and before a magnetic key is fitted.
FIG. 4 is a vertical cross-sectional side view of the example and is a cross-sectional view taken along line 1-1 of FIG. 3.

FIG. 2 is a vertical cross-sectional side view of a cylinder lock protection device with a shutter plate in a closed position and a magnet key fitted therein.

FIG. 3 is a view taken along the line 3-3 of FIG.

4 is a view of the cover member removed from FIG.
FIG.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a view corresponding to FIG. 4 with the shutter plate in the open position.

FIG. 7 is a second protection device for a cylinder lock in a state where the shutter plate is in the closed position and before the magnetic key is fitted.
It is a vertical side view of an Example, and is sectional drawing which follows the 7-7 line of FIG.

FIG. 8 is a vertical cross-sectional side view of the cylinder lock protection device with the shutter plate in the closed position and the magnet key fitted.

9 is a view taken along the line 9-9 of FIG.

10 is a view of FIG. 7 with the cover member removed.
It is a -10 line arrow line view.

11 is a cross-sectional view taken along line 11-11 of FIG.

FIG. 12: FIG. 1 with the shutter plate in the open position
It is a figure corresponding to 0.

[Explanation of symbols]

15 ... Cylinder lock 17 ... Key hole 21 ... Insertion hole 18A, 18B ... Casing 24A, 24B ... Shutter plate 25 ... Magnet lock 26 ... rotor 27: Fitting recess 28 ... Magnet key 48 ... Closing direction biasing spring 52 ... Leaf spring as opening position holding means 54 ... Opening direction biasing spring 55 ... Leaf spring as closed position holding means

Claims (3)

[Claims] 1. A casing (18A) having an insertion hole (21) corresponding to a key hole (17) of a cylinder lock (15).
A shutter plate (24A) housed in the casing (18A) that is operable between a closed position for closing the insertion hole (21) and an open position for opening the insertion hole (21); and a magnet. The shutter plate (24A) has a fitting recess (27) into which the key (28) can be removably fitted and is moved from the closed position to the open position.
Operation of the magnet key (2) to the fitting recess (27).
8) The casing (1
8A) a magnet lock (25) disposed in a vehicle cylinder lock protection device, wherein the shutter plate (24A) is placed between the shutter plate (24A) and the casing (18A) toward the closed position. A closing direction biasing spring (48) for biasing the shutter plate (24) is provided.
A cylinder for a vehicle, characterized in that the casing (18A) is provided with an open position holding means (52) capable of holding A) in the open position against the spring force of the closing direction biasing spring (48). Lock protector. 2. A casing (18B) having an insertion hole (21) corresponding to a key hole (17) of a cylinder lock (15).
A shutter plate (24B) housed in the casing (18B) that is operable between a closed position for closing the insertion hole (21) and an open position for opening the insertion hole (21), and a magnet. The shutter plate (24B) has a fitting recess (27) into which the key (28) can be removably fitted and is moved from the closed position to the open position.
Operation of the magnet key (2) to the fitting recess (27).
8) The casing (1
8B) a magnet lock (25) disposed in the vehicle cylinder lock protection device, the shutter plate (24B) between the shutter plate (24B) and the casing (18B) to the open position side. An opening direction urging spring (54) for urging is provided, and the shutter plate (24
Cylinder for vehicle, characterized in that the casing (18B) is provided with a closed position holding means (55) capable of holding B) in the closed position against the spring force of the opening direction urging spring (54). Lock protector. 3. The rotor (2), wherein the magnet lock (25) is formed separately from the shutter plates (24A, 24B) and provided with the fitting recess (27).
6. The device for protecting a cylinder lock for a vehicle according to claim 1, further comprising: 6), wherein the shutter plate (24A) is interlocked and connected to the rotor (26).