JP4091305B2 - Cylinder lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a rotor is rotatably accommodated in a case, a storage chamber is provided in the rotor, a disk tumbler is rotatably accommodated in the storage chamber, and a key inserted into the case and the disk The present invention relates to a cylinder lock that defines a rotational position of the disk tumbler by engaging with a tumbler, and allows the disk tumbler to be disposed at a position where the rotor can be rotated and a position where the rotor cannot be rotated. is there.
[0002]
[Prior art]
This type of cylinder lock is disclosed in Japanese Utility Model Laid-Open No. 7-14401. In this conventional cylinder lock, the disk tumbler is pushed by the key inserted in the key hole and rotates against the urging force of the spring, and the side bar is fitted in the engaging groove formed in the disk tumbler. It is like that. In a state where the side bar is fitted in the engagement groove, the engagement state between the case and the side bar is released, and the rotor is rotated by an unlocking operation of rotating the key.
[0003]
[Problems to be solved by the invention]
The disk tumbler rotates with the engagement portion between the protrusion engaging portion formed on the rotor and the protrusion formed on the disk tumbler as a fulcrum. Therefore, the entire disc tumbler moves so as to draw an arc. Such movement increases the space required for the rotation of the disc tumbler and increases the size of the cylinder lock.
[0004]
An object of the present invention is to make the cylinder lock compact.
[0005]
[Means for Solving the Problems]
For this purpose, the present invention accommodates a rotor rotatably in a case, and provides a plurality of storage chambers in the rotor, and each storage chamber has a disk tumbler corresponding to the storage chamber per storage chamber. The disk tumbler is housed rotatably one by one, the rotation position of the disk tumbler is defined by the engagement between the key inserted into the case and the disk tumbler, and the rotor can be rotated, and the rotor The cylinder lock in which the disc tumbler can be disposed at a position where the disc tumbler cannot be rotated is an object. In the invention of claim 1, a guided portion is provided on an outer peripheral edge of the disc tumbler, and the guided portion is slidably contacted. A guide portion for guiding the rotation of the disc tumbler is provided in the storage chamber, the rotation center of the disc tumbler is set inside the outer peripheral edge of the disc tumbler, and the key is A dimple key having an unlocking hole recessed in the thickness direction, and the engagement between the disc tumbler and the dimple key through the unlocking hole defines the rotational position of the disc tumbler. I did it.
[0006]
Since the rotational center of the disc tumbler is inside the outer peripheral edge of the disc tumbler, the entire disc tumbler does not move in an arc.
According to a second aspect of the present invention, in the first aspect, the guided portion is an arc-shaped arc-shaped portion, the guide portion is an arc-shaped arc-shaped guide portion, the circle center of the arc-shaped guide portion and the arc-shaped portion The center of the circle was matched.
[0007]
The disc tumbler rotates with respect to the rotor through sliding contact between the arc-shaped portion and the arc-shaped guide portion.
According to a third aspect of the present invention, there is provided a spring that urges the disc tumbler in a direction in which the disc tumbler is rotated, and is an area in which a range of the thickness of the key inserted in the case extends in the width direction of the key. The spring is disposed at a position away from the key, the spring is inclined with respect to the width direction of the key, and the key is a dimple key provided with an unlocking hole recessed in the thickness direction of the key, The engagement between the disc tumbler and the dimple key through the unlocking hole defines the rotational position of the disc tumbler .
[0008]
The configuration in which the spring is inclined with respect to the width direction of the key contributes to the compactness of the space in the case.
According to a fourth aspect of the present invention, in the third aspect, there are a plurality of the same number of the disc tumblers and the springs, and the plurality of springs are divided into at least two different positions when viewed in the key insertion direction. Was arranged.
[0009]
Such an arrangement contributes to making the cylinder lock compact and is effective in preventing unauthorized unlocking.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 6 shows an exploded perspective view of the cylinder lock.
[0011]
As shown in FIG. 1A, a male case 12 is formed in the cylindrical case 11, and a nut 13 is screwed to the male screw 12. The nut 13 is for attaching and fixing the cylinder lock to the attachment target.
[0012]
A rotor 14 is rotatably fitted in the case 11. The rear end portion 141 of the rotor 14 protrudes from the rear end of the case 11, and the rotation amount regulating cam 15 and the action plate 16 are fitted to the rear end portion 141 so as not to be relatively rotatable. A male screw portion 142 is formed at the rear end portion 141. A washer 17 is fitted to the male screw portion 142, and a nut 18 is screwed. The rotation amount regulating cam 15, the action plate 16 and the washer 17 are fixed to the rotor 14 by tightening nuts 18. The rotation amount regulating cam 15 is engaged with the case 11 to regulate the rotation amount of the rotor 14. The action plate 16 engages with a fixing portion other than the cylinder lock to bring about a locking action, or turns an electric switch on and off.
[0013]
A cap 19 is fitted and fixed to the tip of the rotor 14. A keyhole 191 is formed in the cap 19. The key 20 is inserted into the case 11 through the key hole 191.
[0014]
A plurality of storage chambers 21, 22, 23, and 24 are formed in the rotor 14, and annular disk tumblers 25, 26, 27, and 28 are stored in the storage chambers 21 to 24, respectively. A bar insertion hole 29 is formed in the upper part of the rotor 14, and a lock groove 111 is formed in the upper part of the inner peripheral surface of the case 11. Side bars 30 are inserted into the bar insertion holes 29. The side bar 30 is biased toward the rotor 14 by the spring force of the pair of springs 31 and 32.
[0015]
As shown in FIGS. 1B, 2, 3, and 4, a pair of arc-shaped portions 33 and 34 are formed on the outer peripheral edges of the annular disc tumblers 25 to 28. A pair of arcuate guide portions 35 and 36 are formed on the forming wall surfaces of the storage chambers 21 to 24. The circle centers of the arc-shaped portions 33 and 34 and the circle centers of the arc-shaped guide portions 35 and 36 are made to coincide with each other. The circular centers of the arcuate guide portions 35 and 36 are made to coincide with the rotation center C of the rotor 14.
[0016]
The disc tumblers 25 to 28 are accommodated in the accommodating chambers 21 to 24 so that the arc-shaped portions 33 and 34 and the arc-shaped guide portions 35 and 36 are in surface contact. The disc tumblers 25 to 28 are rotatable so that the arc-shaped portions 33 and 34 and the arc-shaped guide portions 35 and 36 are in sliding contact with each other. The rotation centers of the disk tumblers 25 to 28 when the arc-shaped portions 33 and 34 and the arc-shaped guide portions 35 and 36 are in sliding contact are the circle centers of the arc-shaped portions 33 and 34 and the arc-shaped guide portions 35 and 36. .
[0017]
A pair of engaging grooves 39 and 40 are formed on the outer peripheral edges of the disk tumblers 25 to 28. The side bar 30 can be fitted into one of the engagement grooves 39 and 40. A regulation groove 37 is formed between the pair of arcuate guide portions 35 and 36, and a regulation projection 38 is formed between the pair of arcuate portions 33 and 34. The restriction protrusion 38 enters the restriction groove 37, and the restriction groove 37 restricts the movement range of the restriction protrusion 38. That is, the rotation range of the disk tumblers 25 to 28 is restricted by the restriction groove 37 and the restriction protrusion 38.
[0018]
Spring receiving portions 41 are formed on the outer peripheral edges of the disk tumblers 25 to 28. Spring seats 42, 43, 44, 45 are secured to the rotor 14, and coil spring type springs 46, 47, 48, 49 are interposed between the spring seats 42-45 and the spring receiving portion 41. ing. The springs 46 to 49 are arranged at positions opposite to the arcuate guide portion 35 with respect to the rotation center C of the rotor 14. The springs 46 to 49 are shown in the width W of the key 20 [shown by T in FIG. 1B] (shown by T in FIG. 1B). ] Is disposed at a position deviating from the region H [shown in FIG. The springs 46 to 49 are inclined with respect to the direction of the width W of the key 20.
[0019]
FIG. 1 (b) and the spring 46, 49 shown in FIG. 4 is biased to rotate the disc tumbler 25, 28 in a counterclockwise direction. The springs 47 and 48 shown in FIGS. 2 and 3 urge the disc tumblers 26 and 27 to rotate in the clockwise direction.
[0020]
Unlocking protrusions 251, 261, 271, 281 are formed in the vicinity of the spring receiving portion 41 at the inner peripheral edge of the disk tumblers 25-28. The unlocking protrusions 251 to 281 are fitted into the unlocking holes 201, 202, 203, 204 of the inserted dimple key type key 20. The heights of the unlocking protrusions 251 to 281 are slightly different. In accordance with this, the depths of the unlocking holes 201 to 204 are slightly different. If the inserted key 20A (shown in FIG. 5) is not the correct key, for example, as shown in FIG. 5, the disc tumbler 25 rotates from the position shown in FIG. Is pushed into the lock groove 111 on the inner surface of the case 11. This makes the rotor 14 unrotatable and prevents unlocking with an incorrect key. The disc tumblers 25 to 28 are arranged at positions where the rotor 14 can be rotated by inserting the correct key 20, and are arranged at positions where the rotor 14 cannot be rotated by inserting an incorrect key.
[0021]
The following effects can be obtained in the first embodiment.
(1-1) The rotation center C of the disk tumblers 25 to 28 is inside the outer peripheral edge of the disk tumblers 25 to 28. Since the rotation center C of the disk tumblers 25 to 28 is set inside the outer peripheral edge of the disk tumblers 25 to 28, the entire disk tumblers 25 to 28 do not move in an arc. Such rotation of the disk tumblers 25 to 28 can reduce the space for allowing the disk tumbler to move, compared with the cylinder lock disclosed in Japanese Utility Model Laid-Open No. 7-14041, and can make the cylinder lock compact. it can.
[0022]
(1-2) The arc-shaped portions 33 and 34 are guided portions provided on the outer peripheral edges of the disk tumblers 25 to 28. The arcuate guide portions 35 and 36 are guide portions for guiding the rotation of the disk tumblers 25 to 28 by bringing the guided portions into sliding contact with each other. Since the circle centers of the arc-shaped portions 33 and 34 and the circle centers of the arc-shaped guide portions 35 and 36 are matched, the disk tumblers 25 to 28 are in sliding contact with the arc-shaped portions 33 and 34 and the arc-shaped guide portions 35 and 36. Through the rotor 14. Accordingly, the disk tumblers 25 to 28 only rotate around the rotation center C. Such rotation is smooth.
[0023]
(1-3) The springs 46 to 49 that bias the disc tumblers 25 to 28 in a rotating direction are inclined with respect to the direction of the width W of the key 20. Generally, the thickness T of the key is smaller than the width W of the key, and it is easy to secure a space for spring arrangement in the case 11 on the surface side where the unlocking holes 201 to 204 are formed in the key. The structure in which the springs 46 to 49 are inclined with respect to the direction of the width W of the key 20 in such a space for arranging the springs is a structure in which the springs 46 to 49 are disposed at right angles to the direction of the width W of the key 20. Compared with this, a sufficient space is provided for securing the space for the spring arrangement. Therefore, the configuration in which the springs 46 to 49 are inclined with respect to the direction of the width W of the key 20 contributes to the compactness of the space in the case 11.
[0024]
(1-4) Generally, the coil diameters of the springs 46 to 49 are larger than the thickness of the disk tumblers 25 to 28, and when a plurality of coil springs are arranged in the same row (that is, arranged in parallel), a plurality of coil springs are arranged. The space for arrangement becomes longer in the insertion direction of the key 20. In the present embodiment, the plurality of springs 46 to 49 (four in the present embodiment) are all distributed at different positions as viewed in the insertion direction of the key 20. Therefore, all the springs 46 to 49 are not arranged in the same row, and the length of the space for arranging the plurality of coil springs in the insertion direction of the key 20 can be shortened. This contributes to the compactness of the cylinder lock.
[0025]
(1-5) There are a plurality of the same number of the springs 46 to 49 and the disc tumblers 25 to 28, and the plurality of springs 46 to 49 are all arranged at different positions when viewed in the insertion direction of the key 20. . The unlocking protrusions 251 to 281 of the disk tumblers 25 to 28 having substantially the same shape and size are in the vicinity of the spring receiving portion 41 with respect to the springs 46 to 49. And these unlocking protrusions 251 to 281 protrude into the existence area of the key 20 inserted into the case 11 when viewed from the keyhole 191 as shown in FIG. 1B and FIGS. . A configuration in which a plurality of unlocking protrusions 251 to 281 protrude from the region where the key 20 exists is effective in preventing unauthorized unlocking. Therefore, the configuration in which the plurality of springs 46 to 49 that urge the disc tumblers 25 to 28 to rotate is arranged at different positions when viewed in the insertion direction of the key 20 is effective in preventing unauthorized unlocking.
[0026]
In the present invention, the following embodiments are also possible.
(1) Arranging a plurality of springs for urging the disc tumbler in two or three positions.
[0027]
(2) The present invention is applied to a cylinder lock that does not use a side bar.
(3) The inventions of claim 3 and claim 4 are applied to a cylinder lock having a slide type disk tumbler.
[0028]
Inventions other than the claims that can be grasped from the above-described embodiment will be described below.
[1] The range of the thickness of the key according to any one of claims 1 and 2, further comprising a spring that biases the disc tumbler in a rotating direction, and is inserted into the case. A cylinder lock in which the spring is disposed at a position deviated from the region extending in the width direction of the key and the spring is inclined with respect to the width direction of the key.
[0029]
[2] In the above [1], there are a plurality of the same number of the disc tumblers and the springs, and at least two of the plurality of springs are arranged at different positions when viewed in the key insertion direction. Cylinder lock.
[0031]
【The invention's effect】
As described above in detail, a guided portion is provided on the outer peripheral edge of the disc tumbler, and a guide portion for sliding the guided portion to guide the rotation of the disc tumbler is provided in the storage chamber. An invention in which the rotation center of the tumbler is set inside the outer peripheral edge of the disc tumbler, and the range of the thickness of the key inserted in the case is out of the region extending in the width direction of the key. In any of the inventions in which a spring is arranged and the spring is inclined with respect to the width direction of the key, the cylinder lock can be made compact.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a first embodiment. (B) is the sectional view on the AA line of (a).
FIG. 2 is a sectional view taken along line BB in FIG.
FIG. 3 is a cross-sectional view taken along the line CC of FIG.
4 is a cross-sectional view taken along the line DD of FIG.
FIG. 5 is a cross-sectional view showing an unlockable state.
FIG. 6 is an exploded perspective view.
[Explanation of symbols]
11 ... Case. 14 ... Rotor. 20 ... Key. 21, 22, 23, 24... 25, 26, 27, 28: Disc tumbler. 33, 34... Arc portions as guided portions. 35, 36... Arc guide portions as guide portions. 46, 47, 48, 49 ... springs. 201, 202, 203, 204 ... unlocking holes. C: Center of rotation.

Claims (4)

A rotor is rotatably accommodated in the case, and a plurality of storage chambers are provided in the rotor. In each of the storage chambers, one disk tumbler corresponding to the storage chamber can be rotated per storage chamber. A position where the disk tumbler is rotated by engagement between the key inserted in the case and the disk tumbler, a position where the rotor can be rotated, and a position where the rotor cannot be rotated In the cylinder lock in which the disk tumbler can be arranged,
A guided portion is provided on an outer peripheral edge of the disc tumbler, a guide portion for guiding the rotation of the disc tumbler by bringing the guided portion into sliding contact is provided in the storage chamber, and the center of rotation of the disc tumbler is provided. Set inside the outer periphery of the disc tumbler,
The key is a dimple key having an unlocking hole recessed in the thickness direction, and the engagement between the disc tumbler and the dimple key through the unlocking hole is a rotation of the disc tumbler. Cylinder lock that defines the position. 2. The guided portion is an arc-shaped arc-shaped portion, the guide portion is an arc-shaped arc-shaped guide portion, and a circle center of the arc-shaped guide portion is coincident with a circle center of the arc-shaped portion. The cylinder lock described in 1. A rotor is rotatably accommodated in the case, and a plurality of storage chambers are provided in the rotor. In each of the storage chambers, one disk tumbler corresponding to the storage chamber can be rotated per storage chamber. A position where the disk tumbler is rotated by engagement between the key inserted in the case and the disk tumbler, a position where the rotor can be rotated, and a position where the rotor cannot be rotated In the cylinder lock provided with a spring that urges the disk tumbler in a direction to rotate the disk tumbler.
The spring is disposed at a position deviating from a region where the thickness range of the key in the state inserted in the case is extended in the width direction of the key, and the spring is inclined with respect to the width direction of the key. ,
The key is a dimple key having an unlocking hole recessed in the thickness direction, and the engagement between the disc tumbler and the dimple key through the unlocking hole is a rotation of the disc tumbler. Cylinder lock that defines the position. 4. The cylinder according to claim 3, wherein there are a plurality of the disc tumblers and the same number of springs, and the plurality of springs are arranged in at least two different positions as viewed in the insertion direction of the key. Tablets.

Images