JP2003213992A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock capable of being miniaturized in addition to the ensuring of the number of different keys set. <P>SOLUTION: A rotor 13 is housed rotatably to a cylinder 14a for a rotor case 14. The first to fifth housing chambers 31 to 35 are formed so as to be arranged in the axial direction in the rotor 13. Two of the first to third plate tumblers 21 to 23 are housed so as to be arranged in the axial direction of the rotor 13 in each first to fifth housing chamber 31 to 35. Large-diametral recessed sections 43 and small-diametral recessed sections 44 capable of being engaged with unlocking projecting sections 72 for the first to third plate tumblers 21 to 23 are formed on the first straight line L1 and the second straight line L2 on each of the first surface 41 and the second surface 42 of a dimple key 12 in the dimple key 12. The recessed sections 43 and the recessed sections 44 on the first straight line L1 and the recessed sections 43 and the recessed sections 44 on the second straight line L2 are displaced and arranged in the longitudinal direction of the dimple key 12. Parts of the recessed sections 43 are disposed so as to cross over the center line M of the key 12 in the recessed sections 43. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock, and more particularly to a cylinder lock that is unlocked by a dimple key.

[0002]

2. Description of the Related Art Some cylinder locks are configured to be unlocked by a dimple key having an unlocking recess (unlocking recess) formed on the key surface. A tumbler that can be engaged with the unlocking recess of the dimple key is housed in the rotor. When the dimple key is not inserted into the rotor, the tumbler is pushed outward from the peripheral surface of the rotor by the urging force of the spring and engages with the rotor case, so that the rotor cannot rotate. Further, when the correct key is inserted into the rotor, the tumbler engages with the unlocking concave portion of the dimple key and is retracted inward from the peripheral surface of the rotor, so that the rotor can rotate. Also, if an incorrect key is inserted in the rotor,
This incorrect key pushes the tumbler out of the rotor and engages the rotor case, rendering the rotor immobile.

Some cylinder locks provided with such dimple keys have been developed for residential use, and as the structure thereof, for example, a pin tumbler system is used.

[0004]

However, the pin tumbler type cylinder lock has a large number of parts and is required to have high accuracy. Further, the pin tumbler type cylinder lock is relatively weak against rust and dust, and has a problem that its operability is deteriorated in a relatively harsh environment such as when it is attached to an automobile.

A cylinder lock having a plate-like tumbler is conceivable as a cylinder lock having a smaller number of parts than the pin tumbler system and less strict accuracy, and relatively strong against rust and dust. But,
Since the tumbler has a plate shape instead of a pin, the tumbler itself becomes large. Therefore, there is a problem that the rotor that accommodates the tumbler becomes longer in the axial direction and the dimple key also becomes longer, which hinders downsizing of the cylinder lock.

Further, if the number of tumblers and the unlocking recesses are increased in order to secure the number of different keys, the dimple key and the rotor are further lengthened, which further hinders downsizing of the cylinder lock.
The present invention has been made in view of the above problems,
It is to provide a cylinder lock that can be downsized while ensuring the number of key differences.

[0007]

In order to achieve the above object, in the invention according to claim 1, a predetermined key is inserted into a rotor provided with a plurality of plate tumblers,
The plate tumbler is a cylinder lock that is moved to a rotation permitting position that allows the rotor to rotate, and the key is
An unlocking recess engageable with the plate tumbler is a dimple key formed on a key surface, and each plate tumbler is in a state of being engaged with the unlocking recess or in a state of being engaged with the key surface, It is formed so as to be located in the rotation allowance position,
On the at least one surface of the dimple key, the unlocking recesses are formed so as to be lined up in a row along the center line of the dimple key, and at least a part of the unlocking recesses exceeds the center line. The point is that it is formed in this way.

According to the present invention, the unlocking recesses are formed in two or more rows on at least one side of the dimple key, the number of key differences is secured, and the length of the dimple key is shortened. The width of the dimple key can be narrowed as compared with the case where the unlocking recess is formed so as not to exceed the center line. Further, since the diameter of the rotor can be reduced corresponding to the dimple key, the number of key differences can be secured and the cylinder lock can be downsized.

According to a second aspect of the invention, in the first aspect of the invention, the rotor is formed with a storage chamber capable of storing the plate tumbler, and the storage chamber is a shaft of the rotor. In the direction, the gist is that the two plate tumblers are formed so as to be accommodated in one chamber.

According to the present invention, in the rotor, two plate tumblers are accommodated in each accommodation chamber. For this reason, compared with the case where the plate tumblers are housed one by one in one housing chamber,
Since the number of walls is small, the axial length of the rotor and the dimple key length can be shortened, and the cylinder lock can be made smaller.

According to a third aspect of the present invention, in the first aspect of the present invention, the rotor is provided with an accommodating chamber capable of accommodating the plate tumbler. The gist is that the plate tumblers can be accommodated in one room and arranged in a staggered pattern.

According to the present invention, in the rotor, since the storage chambers are arranged in a staggered manner, it is necessary to form all the storage chambers with one plate tumbler accommodated in each storage chamber. The axial length of the rotor can be shortened to the total thickness of the plate tumblers without adding the thickness of the wall between the storage chambers. Therefore, the axial length of the rotor and the dimple key length can be further shortened. Further, even when a biasing means such as a spring for biasing the plate tumbler toward the dimple key is provided, it is not necessary to increase the axial length of the rotor, and a space for accommodating the biasing means can be secured.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a schematic exploded perspective view of a cylinder lock, and FIG. 2 (a) shows a schematic partial side view of a dimple key. 2B is a schematic sectional view taken along the line IIB-IIB of FIG. 2A, and FIG. 2C is a schematic partial side view showing the relationship between the rotor and the plate tumbler.

As shown in FIG. 1, the cylinder lock 11 includes a dimple key 12, a rotor 13, and a rotor case 14. The rotor case 14 is fixed to a support portion (not shown). The rotor case 14 is provided with a cylinder 14a, and the cylindrical rotor 13 is attached to the cylinder 14a.
Is rotatably housed. A key insertion hole 16 for inserting the dimple key 12 is formed in the rotor 13.

A cover 17 covers the rotor 13 housed in the cylinder 14a. A key insertion hole 18 is formed in the cover 17 so as to be opposed to the key insertion hole 16. The rotor 13 is formed so as to be able to penetrate the cylinder 14a. In the rotor 13, the cylinder 14a
The end on the side that penetrates through and is referred to as the first end 19,
The end portion on the side covered with the cover 17 is referred to as a second end portion 20. An action member (not shown) capable of switching the ignition of the vehicle can be attached to the first end 19 of the rotor 13.

The rotor 13 houses a first plate tumbler 21, a second plate tumbler 22, and a third plate tumbler 23. The first to third plate tumblers 21 to 23 are housed in the plural rotors 13, respectively. In addition, the rotor 13 has
A spring 24 as a biasing means for biasing the first to third plate tumblers 21 to 23 to the outside of the rotor 13, a first side bar 25, and a second side bar 26 are housed.

In the rotor 13, when the dimple key 12 is inserted into the key insertion hole 16, the first to third plate tumblers 21 to 23 and the first and second side bars 25 and 26 are arranged on the peripheral surface of the rotor 13. Retract more inward, cylinder 14a
It is configured to be rotatable with respect to. Also,
In a state where the dimple key 12 is not inserted in the key insertion hole 16 or a key whose key difference from the dimple key 12 is incorrect is inserted, the first to third plate tumblers 2
1 to 23 and the first and second side bars 25 and 26 project outside the peripheral surface of the rotor 13 and engage with the cylinder 14a. In this state, the rotor 13 is configured so as not to rotate with respect to the cylinder 14a.

As shown in FIGS. 1 and 2C, with the dimple key 12 inserted into the rotor 13,
At the position facing the tip of the dimple key 12, the first to
A first housing chamber 31 for housing the third plate tumblers 21 to 23 is formed. The first storage chamber 31 is formed so as to be able to store two plate tumblers, and one of the first to third plate tumblers 21 to 23 is a plate tumbler.
In addition to being able to accommodate two sheets, it is also possible to accommodate two different types of plate tumblers. In the rotor 13, from the first storage chamber 31 toward the base side of the dimple key 12,
A second storage chamber 32 and a third storage chamber 3 similar to the first storage chamber 31.
The third, fourth accommodation chamber 34, and fifth accommodation chamber 35 are formed. Each of the second to fifth storage chambers 32 to 35 is also capable of storing two plate tumblers.

In this embodiment, the first to fifth storage chambers 31
To 35 are formed at equal intervals. The first to fifth storage chambers 31 to 35 are in communication with the key insertion hole 16.
The width of each of the first to fifth storage chambers 31 to 35 is formed to be twice the thickness of the plate tumbler. First to third plate tumbler 21
No. 23 to No. 23 are formed in substantially the same shape, and two of them are arranged in the axial direction of the rotor 13, and
1 to 35 are housed.

The dimple key 12 has a first surface 41 as one surface of the dimple key and a second surface 42 as the other surface on the opposite side thereof. A plurality of small-diameter recesses 44 as unlocking recesses are formed. The depth of the small diameter recess 44 is
The large-diameter recess 43 is formed to have a depth almost half that of the large-diameter recess 43. 1 and 2A, the first surface 41 is shown, and the second surface 42 is hidden behind.

In the dimple key 12, the large diameter recess 43 is formed.
And the small-diameter concave portion 44 and a portion where the concave portion is not formed constitute a key code. The tip of the dimple key 12 has the first surface 41.
Side guide slope 45 and the second side 42 side guide slope 46
And has a thin tip.

FIG. 3 shows a schematic sectional view taken along the line III-III of FIG. 2C, FIG. 4A shows a schematic sectional view taken along the line IVA-IVA of FIG. 2C, and FIG. Similarly, the IVB-IVB line schematic sectional view is shown.

As shown in FIG. 3, a first engaging groove 51 is formed on the inner peripheral surface of the cylinder 14a, with which the first to third plate tumblers 21 to 23 can be engaged. The first engagement groove 51 is
It is formed so as to extend in the axial direction. In FIG. 3, the first
The engagement groove 51 is located on the right side. In addition, the cylinder 14
A second engagement groove 52 and a third engagement groove 53 with which the first and second side bars 25 and 26 can be engaged are formed on the inner peripheral surface of a. The second and third engagement grooves 52 and 53 extend in the axial direction corresponding to the lengths of the first and second side bars 25 and 26, face each other with the central axis interposed therebetween, and are opposed to the central axis. It is formed at a position where the angle with the first engagement groove 51 is 90 °. In FIG. 3, the second engagement groove 52 is located on the lower side,
The engagement groove 53 is located on the upper side.

Each of the first to fifth storage chambers 31 to 35 has a first
A large opening 55 for allowing the third plate tumblers 21 to 23 to come in and out is provided. In addition, a spring 24 is provided on the rotor 13 on the side opposite to the large opening 55 with the central axis interposed therebetween.
An accommodation groove 56 for accommodating the is formed. Four of the storage grooves 56 are formed in each of the first to fifth storage chambers 31 to 35. In each storage chamber, two storage grooves 56 are provided on the side corresponding to one plate tumbler, and a side corresponding to the other plate tumbler. Two of them are formed. Further, the spring 24 is housed in two housing grooves 56 of the four housing grooves 56 for each housing chamber so that one spring 24 biases one plate tumbler. The springs 24 are arranged in a zigzag manner and are housed in the housing grooves 56, and a total of 10 springs 24 are housed. In addition, in FIG. 1, the second storage chamber 32 to the fourth storage chamber
Illustration of the spring 24 corresponding to the accommodation chamber 34 is omitted.

The rotor 13 has a first accommodation hole 58 for accommodating the first side bar 25 and a second accommodation hole 59 for accommodating the second side bar 26. First
And the 2nd accommodation holes 58 and 59 are the 1st-5th accommodation chambers 31-.
It is in communication with 35. In addition, the first and second side bars 25, 26 have compression springs 60 (see FIG.
Installed). The compression spring 60 is supported by the rotor 13 on the radially outer side by the support portion 60 a, and the first and second side bars 25 and 26 are biased toward the central axis of the rotor 13 by the compression spring 60. There is.

The first plate tumbler 21 is housed in some of the first to fifth housing chambers 31 to 35 so as to correspond to the large-diameter recess 43. Further, the second plate tumbler 22 corresponds to the small-diameter recess 44, and the third plate tumbler 23 corresponds to the place where the recess is not formed on the key surface of the dimple key 12 so as to correspond to the first to fifth storage chambers 31 to 31. It is housed in 35.

In this embodiment, as shown in FIG. 1, the first accommodating chamber 31 accommodates two first plate tumblers 21. Further, as shown in FIGS. 1 and 3, in the second storage chamber 32, the second plate tumbler 22 is stored on the first end 19 side and the first plate tumbler 21 is stored on the second end 20 side. Has been done. Further, as shown in FIG. 1, the first plate tumbler 21 is housed in the third storage chamber 33 on the first end 19 side,
A third plate tumbler 23 is housed on the second end 20 side. Two second plate tumblers 22 are accommodated in the fourth accommodating chamber 34, and as shown in FIGS. 1 and 4, the fifth accommodating chamber 35 includes a third plate tumbler on the first end 19 side. 23 is accommodated, and the first plate tumbler 21 is accommodated on the second end 20 side.

In the first surface 41 and the second surface 42, the centers of the large-diameter recesses 43 and the small-diameter recesses 44 are on the first straight line L1 and the second straight line L2 extending in the length direction of the dimple key 12. It is formed so that it may be located in one side. The first straight line L1 is located on the lower side in FIGS. 1 and 2A on the first surface 41, and the second straight line L2 is located on the upper side in the drawings.

In this embodiment, two large diameters are provided on the tip side of the dimple key 12 so as to correspond to the plate tumblers of the first storage chamber 31 when the dimple key 12 is inserted into the rotor 13. The recesses 43 are arranged offset in the length direction of the key. The large-diameter recess 43 formed on the second straight line L2 is arranged closer to the tip side of the dimple key 12 than the large-diameter recess 43 formed on the first straight line L1. Further, in the dimple key 12, a large-diameter concave portion 43 and a small-diameter concave portion 44 are arranged so as to be opposed to the second accommodation chamber 32, shifted in the length direction of the key, and are formed on the second straight line L2. The small-diameter recess 44 is located closer to the tip of the dimple key 12 than the large-diameter recess 43 formed on the first straight line L1.

A large-diameter recess 43 is formed on the second straight line L2 so as to be located on the tip side of the dimple key 12 at a position facing the third storage chamber 33 in the dimple key 12, and the first straight line is formed. No recess is formed on L1. Further, in the dimple key 12, the fourth storage chamber 34
Two small-diameter recesses 44 are arranged so as to be offset from each other in the key length direction, and the small-diameter recess 44 on the second straight line L2 is dimpled more than the small-diameter recess 44 on the first straight line L1. It is on the tip side of the key 12. Further, in the position facing the fifth storage chamber 35 in the dimple key 12,
No recess is formed on the second straight line L2, and a large-diameter recess 43 is formed on the first straight line L1 so as to be located on the base side of the dimple key 12.

The large-diameter recess 43 and the small-diameter recess 44 are formed so as to extend beyond the center line M of the dimple key 12, and are formed so as to be in point contact with each other or partially overlap each other. The two large-diameter recesses 43 corresponding to the first storage chamber 31 partially overlap each other. In addition, the second storage chamber 3
The large diameter recess 43 and the small diameter recess 44 corresponding to 2 partially overlap. Further, the large-diameter recess 43 corresponding to the second storage chamber 32 and the large-diameter recess 43 corresponding to the third storage chamber 33 are substantially in point contact with each other, and the two small-diameter recesses 44 corresponding to the fourth storage chamber 34. The two are almost in point contact with each other.

The dimple key 12 has a first surface 41 and a second surface 41.
It is formed so that it can be inserted into the key insertion hole 16 without having to distinguish the surface 42 (reversible specification). Specifically, the large diameter recess 43 and the small diameter recess 44 of the first surface 41, and the large diameter recess 43 and the small diameter recess 4 of the second surface 42.
4 is formed so as to overlap when the dimple key 12 is rotated by 180 ° around the central axis. Therefore, as shown in FIG. 2B, in the second surface 42, on the side opposite to the first straight line L1 of the first surface 41, the same as the large-diameter recess 43 and the small-diameter recess 44 on the second straight line L2. Large-diameter recesses 43 and small-diameter recesses 44 are formed in an array. Similarly, the second
On the surface 42, on the side opposite to the second straight line L2 of the first surface 41, the large-diameter concave portions 43 and the small-diameter concave portions 44 are formed in the same arrangement as the large-diameter concave portions 43 and the small-diameter concave portions 44 on the first straight line L1. .

As shown in FIGS. 3 and 4, each of the first to third
The plate tumblers 21 to 23 are formed in substantially the same shape, and a through hole 70 through which the dimple key 12 can pass is formed.
And an engaging protrusion 71 that can engage with the first engaging groove 51, and an unlocking protrusion 72 that engages with the large-diameter recess 43 and the small-diameter recess 44. .

The unlocking protrusion 72 is formed so as to protrude into the through hole 70 on the side opposite to the engaging protrusion 71. The height of the unlocking protrusion 72 is formed to be substantially the same as the depth of the large diameter recess 43. Through hole 70 and unlocking protrusion 72
Are formed to have a common size and a common shape in the first to third plate tumblers 21 to 23. The width of the engaging protrusion 71 is formed to be substantially the same as the width of the first engaging groove 51.

The first plate tumbler 21 is engaged when the dimple key 12 is inserted into the rotor 13 so that the dimple key 12 penetrates the through hole 70 and the entire unlocking protrusion 72 engages with the large diameter recess 43. The projecting portion 71 is formed so as to be retracted inside the rotor 13. In this state, the first plate tumbler 21 is located at the rotation permitting position that allows the rotor 13 to rotate.

Further, the first and second side bars 25 and 26 are formed with engaging portions 75 having a substantially triangular cross section, and the first to third plate tumblers 21 to 23 are engaged with each other. Part 7
An engaging recess 76 is formed that can engage with 5. The cross-sectional shape of the engaging recess 76 is formed in a substantially triangular shape similar to the cross-sectional shape of the engaging portion 75. The engaging recesses 76 are first
The third plate tumblers 21 to 23 are formed at positions where the third plate tumblers 21 to 23 can face the first and second accommodation holes 58 and 59 in a state where the third plate tumblers 21 to 23 are positioned at the rotation permitting position.

The first and second side bars 25, 26 are arranged such that the rotor 13 is engaged with the engagement portion 75 in engagement with the engagement recess 76.
It is formed to retract inside. In addition, each of the first to third plate tumblers 21 to 23 moves from the rotation permitting position,
When the engaging concave portion 76 no longer faces the engaging portion 75, the first,
The second side bars 25 and 26 are pushed out of the rotor 13 and engage with the second and third engagement grooves 52 and 53, and the rotor 1
It is designed so that 3 cannot be rotated.

The first plate tumbler 21 is a dimple key 1
2 is pulled out from the rotor 13, and the dimple key 12
When is no longer engaged with the first plate tumbler 21, the urging force of the spring 24 moves to the first engagement groove 51 side, and the engagement protrusion 71 is formed to be pushed out of the rotor 13. Then, the engagement protrusion 71 engages with the first engagement groove 51, whereby the rotation of the rotor 13 is restricted. In addition, the movement of the first plate tumbler 21 pushes the first and second side bars 25 and 26 out of the rotor 13 to engage with the second and third engagement grooves. Movements are being regulated.

When an incorrect key is inserted into the rotor 13, the unlocking protrusion 72 of the first plate tumbler 21 is
The tip end thereof may engage with a recess shallower than the large-diameter recess 43, for example, a small-diameter recess 44, or may come into contact with a portion of the key surface where no recess is formed. In such a case, the first plate tumbler 21 is formed so as to move to the spring 24 side. Due to this movement, the first and second side bars 25 and 26 are pushed out of the rotor 13 and engage with the second and third engagement grooves, whereby the rotor 1
The rotation of 3 is restricted. Further, in this embodiment, since the through hole 70 is formed so that the first to third plate tumblers 21 to 23 can sufficiently move to the spring 24 side, the key insertion hole 16 is slightly close to the large opening 55 side. It is formed on the rotor 13 so as to be eccentric.

As shown in FIG. 4A, in the second plate tumbler 22, the dimple key 12 is inserted into the rotor 13 so that the dimple key 12 penetrates the through hole 70, and the tip of the unlocking projection 72 is formed. The engagement protrusion 71 is formed so as to be retracted inside the rotor 13 while being engaged with the small-diameter recess 44. In this state, the second plate tumbler 22 is located at the rotation permitting position.

The second plate tumbler 22 is a dimple key 1
When 2 is pulled out from the rotor 13, the engaging protrusion 71 is pushed out of the rotor 13 by the urging force of the spring 24, engages with the first engaging groove 51, and the rotation of the rotor 13 is restricted. Is formed in. Further, in this case, the rotation of the rotor 13 is also restricted by the first and second side bars 25 and 26 being pushed out of the rotor 13 and engaging with the second and third engaging grooves. It has become.

Further, in the second plate tumbler 22, when an incorrect key is inserted into the rotor 13 and engages with a recess shallower than the small-diameter recess 44, or comes into contact with a portion of the key surface where the recess is not formed, It is formed so as to move to the spring 24 side. By this movement, the first and second side bars 25, 26 are pushed out of the rotor 13 and engage with the second and third engaging grooves, so that the rotation of the rotor 13 is restricted. .

Further, as shown in FIG. 4B, in the third plate tumbler 23, the dimple key 12 is inserted into the rotor 13, and the tip end of the unlocking protrusion 72 is formed with a recess on the key surface. The engaging protrusion 71 is formed so as to be retracted to the inside of the rotor 13 in a state in which the engaging protrusion 71 abuts on a non-engaged portion. In this state, the third plate tumbler 23 is located at the rotation permitting position.

The third plate tumbler 23 is a dimple key 1
When 2 is pulled out from the rotor 13, the engaging protrusion 71 is pushed out of the rotor 13 by the urging force of the spring 24, engages with the first engaging groove 51, and the rotation of the rotor 13 is restricted. Is formed in. Further, in this case, the rotation of the rotor 13 is also restricted by the first and second side bars 25 and 26 being pushed out of the rotor 13 and engaging with the second and third engaging grooves. It has become.

The third plate tumbler 23 is located on the side of the spring 24 when an incorrect key is inserted into the rotor 13 and the unlocking protrusion 72 engages with the recesses such as the large diameter recess 43 and the small diameter recess 44. Formed to move. By this movement, the first and second side bars 25, 26 are pushed out of the rotor 13 and engage with the second and third engagement grooves,
Rotation of the rotor 13 is restricted.

Next, the operation of the cylinder lock constructed as described above will be described. Dimple key 12 is key insertion hole 1
6 is not inserted, the first to third plate tumblers 21 to 23 are moved to the first position by the urging force of each spring 24.
It moves to the engagement groove 51 side, the engagement protrusion 71 is pushed out of the rotor 13 and engages with the first engagement groove 51. Therefore, the rotor 13 is in a state in which it cannot rotate with respect to the cylinder 14a. Also, the first and second side bars 2
5, 26 are no longer engaged with the engaging recesses 76, and the rotor 13
The rotor 13 cannot be rotated by being pushed out to the outside and engaging with the second and third engaging grooves 52 and 53.

When the dimple key 12 is inserted into the rotor 13, the unlocking projection 72 of the first plate tumbler 21 engages with the large-diameter recess 43, as shown in FIGS. The unlocking protrusion 72 engages with the small diameter recess 44.
Further, the unlocking protrusion 72 of the third plate tumbler 23 comes into contact with a portion of the surface of the dimple key 12 where no recess is formed. Therefore, the first to third plate tumblers 21 to 2
3 moves to the rotation permitting position, the engaging protrusions 71 retract inside the rotor 13, and the first and second side bars 25 and 26 retract inside the rotor 13.
3 becomes rotatable with respect to the cylinder 14a.

In this state, when the dimple key 12 is rotated and the rotor 13 is rotated together with the dimple key 12, the action member attached to the first end 19 of the rotor 13 is rotated and the ignition of the vehicle is performed. Turns on.

Further, an incorrect key 78 is inserted into the rotor 13, and the tip of the unlocking protrusion 72 of the first plate tumbler 21 is shallower than the large diameter recess 43, for example, the small diameter recess 44.
The first plate tumbler 21 moves toward the spring 24 when engaging with or contacting a portion of the key surface where no recess is formed (see FIG. 5). Due to this movement, the engaging portion 75 no longer engages with the engaging recessed portion 76, and the first
Since the second side bars 25 and 26 are pushed out of the rotor 13 and engaged with the second and third engagement grooves 52 and 53, the rotor 13 cannot rotate.

Further, an incorrect key is inserted into the rotor 13, the tip of the unlocking projection 72 of the second plate tumbler 22 engages with a shallower recess than the small diameter recess 44, or a recess is formed on the key surface. When it comes into contact with a place that is not open, the first and second side bars 25 and 26 are
It engages with the engagement grooves 52, 53. Therefore, the rotor 13 cannot rotate.

Further, the unlocking protrusion 72 of the second plate tumbler 22.
However, when engaging with a recess deeper than the small-diameter recess 44, for example, the large-diameter recess 43, the engagement protrusion 71 is pushed out of the rotor 13 by the urging force of the spring 24 and engages with the first engagement groove 51. Therefore, the rotor 13 cannot rotate.
In addition, the rotor 13 cannot rotate due to the first and second side bars 25 and 26.

Further, the unlocking projection 72 of the third plate tumbler 23
However, when engaging with the large-diameter concave portion 43, the small-diameter concave portion 44, or the like, the engaging protrusion 71 is pushed out of the rotor 13 by the urging force of the spring 24 and engages with the first engaging groove 51. Therefore, the rotor 13 cannot rotate. Also, the first
Also, the rotor 13 cannot rotate due to the second side bars 25 and 26.

As described above, since at least one plate tumbler out of a total of 10 first to third plate tumblers 21 to 23 is present at an incorrect position, the rotor 13
Cannot be rotated.

This embodiment has the following effects. (1) In the dimple key 12, a large-diameter recess 43 and a small-diameter recess 44 arranged in two rows are formed so as to cross the center line M of the dimple key 12 and partially overlap or make point contact. ing. For this reason, the width of the dimple key 12 can be narrowed and the diameters of the rotor 13 and the rotor case 14 can be reduced while securing the number of key differences, and the cylinder lock 11 can be made compact.

(2) In each of the first to fifth storage chambers 31 to 35, two first to third plate tumblers 21 to 23 are stored side by side in the axial direction. Therefore, one in one storage chamber
Compared with the case where a single plate tumbler is accommodated, the number of key differences is secured, the rotor 13 can be shortened in the axial length, and the dimple key 12 can be shortened. Can be downsized.

(3) The rotor 13 houses the first to third plate tumblers 21 to 23, and the number of parts can be reduced as compared with the pin tumbler system. Further, the height of the requirement for accuracy can be reduced. Further, as compared with the pin tumbler method, it is possible to reduce deterioration in operability due to rust or dust.
For this reason, the cylinder lock can be attached even to an automobile with a relatively severe environment.

(4) The first to third plate tumblers 21 to 23 are combined with the first and second side bars 25 and 26, which cannot be combined with the pin tumbler. First
Since the second side bars 25 and 26 are mounted at positions not visible from the key insertion hole 18, the cylinder lock 11
The picking resistance can be improved.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In this embodiment,
The plate tumbler is divided into two parts, the size of the storage chamber for storing the plate tumbler is halved, and the storage chambers are arranged in a staggered manner, which is the main difference from the above embodiment. The same parts as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 6 (a) is a schematic partial side view of the dimple key of the second embodiment, and FIG. 6 (b) is a schematic partial side view showing the relationship between the rotor and the plate tumbler. Figure 7
6A is a schematic sectional view taken along line VIIA-VIIA in FIG. 6B, and FIG. 7B is a schematic sectional view taken along line VIIB-VIIB.

As shown in FIG. 7 (a), the first plate tumbler 81 of this embodiment is formed in a shape obtained by dividing the first plate tumbler 21 of the first embodiment into two, and the through hole is formed. 70, an engaging projection 83 that divides the engaging projection 71 into two, and an unlocking projection 8 corresponding to the unlocking projection 72.
4 and. In addition, the first plate tumbler 81 is provided with one engagement recess 76 corresponding to one of the first and second side bars 25, 26.

Further, as shown in FIG. 7B, the second plate tumbler 85 of this embodiment is also formed in a shape obtained by dividing the second plate tumbler 22 of the first embodiment into two, A recess 82, an engaging projection 83, an unlocking projection 84, and an engaging recess 76 are provided.

Similarly, the third plate tumbler 86 (FIG. 6B)
Also, the third plate tumbler 23 of the first embodiment is formed into a shape that is divided into two parts, and includes a recess 82, an engaging projection 83, an unlocking projection 84, and an engaging recess 76. There is.

As shown in FIG. 6 (b), the rotor 90 of this embodiment includes first to third plate tumblers 81, 85, and 8.
A plurality of storage chambers 91 for storing 6 are formed. Each of the accommodation chambers 91 is formed so that one plate tumbler can be accommodated therein, and each of the first to fifth accommodation chambers 31 to 3 of the first embodiment.
The width and the length are formed in half as compared with No. 5. A total of 10 storage chambers 91 are formed.

Further, the housing groove 9 for housing the spring 24
2 is formed such that one accommodation groove 92 corresponds to one accommodation chamber 91 and is arranged in a staggered manner corresponding to the accommodation chamber 91. Further, each spring 24 is connected to each of the first to third plate tumblers 81, 85, 86.
In order to facilitate the urging of the unlocking protrusion 84 of each
2 are formed close to each other corresponding to the unlocking protrusion 84.

The accommodating chamber 91 is formed so that the space between the accommodating chamber 91 and the adjacent accommodating chamber 91 in the axial direction of the rotor 90 is substantially the same as the width of the accommodating chamber 91, that is, the thickness of the plate tumbler. And all the accommodating chambers 91 are formed at equal pitch intervals. Therefore, in the accommodation chamber 91, ten accommodation chambers 91 are arranged in a zigzag manner in the range of the same length as the thickness of ten plate tumblers in the axial direction of the rotor 90.

Further, in the rotor 13 of the first embodiment,
The axial length of the portion required to accommodate the first to third plate tumblers 21 to 23 in total is 10 by the thickness of the wall between the first to fifth storage chambers 31 to 35. It is longer than the thickness of the first to third plate tumblers 21 to 23. Therefore, in the rotor 90, the axial length of the portion required to form the accommodation chamber 91 is the first to fifth accommodation chambers 3
The thickness of the wall between 1 to 35 corresponds to the rotor 1 of the first embodiment.
It is shorter than 3. Therefore, the rotor 90 and the rotor case 93 of this embodiment are formed shorter than the rotor 13 and the rotor case 14 of the first embodiment, respectively.

As shown in FIG. 6A, the large diameter recess 43 and the small diameter recess 44 formed in the dimple key 94 of this embodiment are arranged so as to correspond to the accommodation chamber 91. Therefore, in the dimple key 12 of the first embodiment, the large-diameter concave portion 43 and the small-diameter concave portion 44, which are separated from each other in the length direction of the key, are also formed close to each other, and are formed so as to partially overlap or make point contact. Has been done. Therefore, the dimple key 94 is the dimple key 1 of the first embodiment.
It is formed shorter than 2.

Also in the cylinder lock of this embodiment, when the dimple key 94 is not inserted in the rotor 90, the engaging projection 83 is engaged with the first engaging groove 51 by the urging force of the spring 24, Rotation of the rotor 90 is restricted. Further, the first and second side bars 25, 26 project to the outside of the rotor 13 and engage with the second, third engaging grooves 52, 53, so that the rotor 90 cannot rotate.

When a key different from the dimple key 94 is inserted into the rotor 90, the first and second sidebars 25 and 26 engage with the second and third engaging grooves 52 and 53, so that the rotor 90 moves. It cannot rotate.

According to this embodiment, in addition to the effects (1), (3) and (4) of the above embodiment, the following effects are obtained. (5) The rotor 90 includes the first to third plate tumblers 81, 8
The accommodating chambers 91 of 5,86 are arranged in a staggered manner and are formed at equal pitches. Therefore, the number of key differences can be secured, the width of the dimple key can be reduced, the diameter of the rotor can be reduced, and the axial length of the rotor can be further shortened. As a result, the length of the dimple key can be shortened, and the axial length of the cylinder lock can be shortened.
It can be made more compact than the above embodiment.

(6) Since the accommodating chambers 91 are arranged in a zigzag manner, the axial length of the rotor 90 and the dimple key 94 are shortened, and the diameter of the spring 24 is ensured. The accommodation groove 92 can be formed.

The embodiment is not limited to the above, but may be modified as follows. -Dimple key 1 in the first and second embodiments
The combination of the large-diameter concave portion 43, the small-diameter concave portion 44, and the portion in which the concave portions are not formed in 2, 94 are not limited to the above case, and may be formed in other combinations. First to
The third plate tumbler corresponds to the combination,
It accommodates in each accommodation chamber 31-35,91.

The rotors 13 and 90 of the accommodating chambers 31 to 35 and 91 are arranged such that the large opening 55 is on the side of the first engaging groove 51.
It is not limited to being formed into. For example, the rotor 13,
In 90, a similar engagement groove is formed on the opposite side of the first engagement groove 51 with the central axis interposed therebetween, and the accommodation chambers 31 to 35, 35 are arranged so that the large opening 55 is on the engagement groove side. 91 may be formed. For example, the accommodation chambers in which the large openings 55 are located on the first engagement groove 51 side and the accommodation chambers in which the large openings 55 are located on the engagement groove side are formed alternately in the axial direction of the rotor. Good.

In the first embodiment, the two plate tumblers in one accommodation chamber are not limited to be arranged in the same direction, but may be arranged so as to face opposite sides. . For example, the accommodation chamber is formed so that two plate tumblers can be taken in and out from opposite sides,
The springs 24 are arranged on opposite sides, and one plate tumbler is housed in the housing chamber so that the engaging protrusion 71 faces the side opposite to the first engaging groove 51. In this case, the spring 24 urging one plate tumbler is arranged so as to be displaced from the position corresponding to the unlocking protrusion 72 so that the spring 24 does not hinder the movement of the engaging protrusion 71 of the other plate tumbler. To do. Then, a similar engagement groove is formed on the inner peripheral surface of the cylinder 14a on the side opposite to the first engagement groove 51, so that the engagement protrusion 71 of one plate tumbler can be engaged.

In the first embodiment, the first to fifth storage chambers 31 to 35 may be arranged so that the space between adjacent storage chambers becomes narrower. In the first embodiment, the accommodation chamber is not limited to be formed so as to accommodate two plate tumblers, and for example, one accommodation chamber may accommodate three or more plate tumblers. The thickness of the storage chamber may be increased.

The unlocking recesses formed on the dimple keys 12 and 94 are not limited to the two types of the large-diameter recess 43 and the small-diameter recess 44, and may be three or more types. Further, the number of engaging projections of the plate tumbler is also formed corresponding to the number of types of unlocking recesses. The size of the unlocking recess may be one.

In the first embodiment, the first and second
The sidebars 25 and 26 are not limited to being provided with both, and for example, either one may not be provided. In the first and second embodiments, the first and second sidebars 25 and 26 are not limited to engaging the second and third engaging grooves 52 and 53 to make the rotor non-rotatable, An engaging protrusion that is engageable with the cylinder 14a may be formed on the opposite side of the plate tumbler from the engaging protrusion 71. For example, in a plate tumbler, an engaging protrusion is formed next to the spring 24,
The rotor is formed with a through hole through which the engaging protrusion can be inserted, and the inner peripheral surface of the cylinder 14a is formed with an engaging groove at a position corresponding to the through hole. With this configuration, when the plate tumbler moves in the direction opposite to the biasing direction of the spring from the rotation permitting position, the engaging protrusion projects to the outside of the rotor and engages with the engaging groove to rotate the rotor. Since it becomes immovable, both the first sidebar 25 and the second sidebar 26 may not be provided.

In the first and second embodiments, the number of plate tumblers is not limited to 10 and may be 11 or more. Also, nine or less plate tumblers may be provided. -In 1st Embodiment, the 1st-5th accommodation chambers 31-3 are provided.
5 is not limited to being formed so that the intervals between the adjacent storage chambers are equal to each other, for example, the intervals are different, and the dimples are formed in correspondence with the intervals of the first to fifth storage chambers. You may determine the space | interval of the unlocking recessed part of the key 12.

In the second embodiment, the accommodating chambers 91 are not limited to be formed at equal pitches, but may be formed at different intervals, for example. In this case, the interval is the second
It is formed so as to be larger than that in the above embodiment. Further, the gap may be formed so as to be smaller than that in the second embodiment.

The cylinder lock may be formed so as to include both the accommodation chamber and the plate tumbler of the first embodiment and the accommodation chamber and the plate tumbler of the second embodiment. In the first embodiment, the accommodation chamber is not limited to one chamber capable of accommodating two plate tumblers. For example, one chamber may be configured to accommodate one plate tumbler. Good.

The large-diameter recesses 43 and the small-diameter recesses 44 are not limited to being formed in two rows along the center line M of the key on one side of the dimple key, but may be formed in three or more rows. The dimple keys 12 and 94 are not limited to being reversibly formed, and may be, for example, the first surface 41 and the second surface 4.
It is not necessary to form the large-diameter recess 43 and the small-diameter recess 44 on only one of the two surfaces, and not form the recess on the other surface.

The key insertion hole 16 is not limited to be formed in the rotor 13 so as to be eccentric, and may be formed so as not to be eccentric. The cylinder lock is not limited to being attached to the ignition device of the vehicle, but may be attached to, for example, the door lock device of the vehicle, and the action member attached to the rotor may be connected to the door lock device.

The cylinder lock is not limited to being attached to the vehicle, such as the vehicle ignition device and door, and may be used for other purposes. For example, it may be attached to a door of a house or the like.

Next, the technical ideas that can be understood from the above-mentioned embodiment will be added below. (1) In the invention according to claim 3, the accommodation chambers are formed at an equal pitch by the thickness of the plate tumbler.

(2) In the invention according to any one of claims 1 to 3 and (1), when the plate tumbler is located at a position other than the rotation permitting position, A side bar is attached to make the rotor non-rotatable by protruding to the outside of the rotor and engaging with the rotor case.

[0087]

As described above in detail, according to the inventions of claims 1 to 3, the size can be reduced while securing the number of key differences.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a cylinder lock.

FIG. 2A is a schematic partial side view of a dimple key,
(B) is a schematic cross-sectional view taken along line IIB-IIB of (a), and (c) is a schematic partial side view showing the relationship between the rotor and the plate tumbler.

FIG. 3 is a schematic cross-sectional view taken along the line III-III of FIG.

4A is a schematic cross-sectional view taken along the line IVA-IVA in FIG. 2C, and FIG. 4B is a schematic cross-sectional view taken along the line IVB-IVB.

FIG. 5 is a schematic cross-sectional view of the cylinder lock with an incorrect key inserted.

FIG. 6A is a schematic partial side view of the dimple key according to the second embodiment, and FIG. 6B is a schematic partial side view showing the relationship between the rotor and the plate tumbler.

7A is a schematic sectional view taken along the line VIIA-VIIA in FIG. 6B, and FIG. 7B is a schematic sectional view taken along the line VIIB-VIIB.

[Explanation of symbols]

11 ... Cylinder lock, 12, 94 ... Dimple key, 1
3, 90 ... Rotor, 21-23 ... 1st-3rd plate tumblers, 81, 85, 86 ... 1st-3rd plate tumblers, 31-
35 ... 1st-5th accommodation chamber, 41 ... 1st surface as one side of a dimple key, 42 ... 2nd surface, 91 ... accommodation chamber,
43 ... Large-diameter recess as unlocking recess, 44 ... Small-diameter recess, L1, L2 ... First and second straight lines, M ... Center line.

Claims (3)

[Claims] 1. A plate tumbler is formed by inserting a predetermined key into a rotor having a plurality of plate tumblers.
A cylinder lock that is moved to a rotation permitting position that allows the rotor to rotate, wherein the key is a dimple key in which an unlocking concave portion that can be engaged with the plate tumbler is formed on a key surface, Each plate tumbler is formed so as to be located at the rotation permitting position in a state of being engaged with the unlocking concave portion or a state of being engaged with the key surface, and the dimple key is provided with at least one surface thereof as described above. A cylinder lock characterized in that unlocking recesses are formed so as to be arranged in a row along a center line of the dimple key, and at least some of the unlocking recesses are formed so as to cross the center line. 2. The rotor is formed with an accommodating chamber capable of accommodating the plate tumbler, and the accommodating chamber is capable of accommodating two plate tumblers in one chamber in the axial direction of the rotor. The cylinder lock according to claim 1, wherein the cylinder lock is formed. 3. A storage chamber capable of accommodating the plate tumblers is formed in the rotor, and the storage chamber is capable of accommodating one plate tumbler in one chamber and is arranged in a staggered manner. The cylinder lock according to claim 1, wherein the cylinder lock is used.