JP3330728B2 - Cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device, and more particularly to a cylinder lock having a high resistance to breaking.

[0002]

2. Description of the Related Art In a conventional cylinder lock, a regular key can be rotated to a locked position or an unlocked position on a key cylinder provided with a tumbler which engages a groove formed in a case. In the conventional cylinder lock in which the rotation of the key cylinder is prevented by the tumbler that engages with the groove in the case, there is a risk that the tumbler may be unlocked due to breakage. Therefore,
For example, as disclosed in Japanese Patent Application Laid-Open No. 1-315569, a free-turn type cylinder lock in which a key cylinder freely rotates in a case where a rotational force is applied to a key cylinder to unlock the key cylinder has been proposed. The cylinder lock includes a sleeve rotatably disposed in a case, and a key cylinder rotatably supported in the sleeve.

When a regular key is inserted into a key cylinder, a tumbler in the key cylinder is separated from a groove formed in the sleeve, and the key cylinder can be rotated relative to the sleeve. Thereby, the sliding ring can be engaged with the lock piece operating member to operate the lock device. When a different key is inserted into the key cylinder, the key cylinder is held in a state of being engaged with the sleeve by the tumbler, so that the key cylinder rotates together with the sleeve. As a result, the lock piece operating member cannot be rotated, so that the lock device cannot be operated.

[0004] In such a free-turn type cylinder lock, the key cylinder rotates freely when different types of keys are used. For this reason, since a rotational force for breaking the tumbler cannot be applied, a large resistance to breaking can be given.

[0005]

SUMMARY OF THE INVENTION Incidentally, Japanese Patent Application Laid-Open No. Hei.
The lock device disclosed in Japanese Patent Publication No. 315569 has a disadvantage that the key cylinder cannot be operated smoothly after a different kind of key is used. That is, a torsion spring is provided between the front plate and the key cylinder in order to automatically return the rotated key cylinder to the initial position in the lock device. When a different type of key is inserted into the key cylinder and the sleeve and the key cylinder are freely rotated together, the torsion spring generates a reaction force. However, if the torsion spring is not provided,
When the key cylinder is rotated by using a regular key, the key cylinder does not automatically return to the initial position, so that there is a disadvantage that a smooth locking or unlocking operation becomes difficult. Also,
In the lock device disclosed in the above publication, since the torsion spring is provided at the front of the lock device, there is a risk of freezing in a cold region.

Further, in the lock device disclosed in Japanese Patent Application Laid-Open No. 1-315569, the key cylinder and the lever are normally disconnected from each other. The lever is connected to allow the locking device to be operated.
Thus, it is necessary to rotate the key cylinder for a certain range of play angle until the key cylinder and the lever are connected, during which the lever is not rotated. In the lock device disclosed in the above publication, the lever is fixed to the case by a slide member that holds the lever in a non-rotating state. Become. Such an angle of play prevents quick and smooth operation of the locking device. Also, to move the slide member in the axial direction,
There is a disadvantage that the cylinder lock becomes large in the length direction.

[0007] Therefore, the present invention provides good durability and operability because the drive member can be rotated simultaneously with the rotation of the key cylinder when a regular key is used, and there is no component that moves in the axial direction. It is an object of the present invention to provide a cylinder lock in which a key cylinder can be completely freely rotated at times.

[0008]

A cylinder lock according to the present invention includes a housing (11) having a first receiving hole (12) and a rotatable housing in the first receiving hole (12) of the housing (11). A sleeve (13) arranged and having a second accommodation hole (14) and a locking portion (15); and a key cylinder (14) rotatably arranged in the second accommodation hole (14) of the sleeve (13). 16) and key cylinder (16)
Locking part (15) of a sleeve (13) slidably disposed within
A tumbler (17) engageable with the housing and a drive member rotatably provided with the key cylinder (16) with respect to the housing (11).
(18), the key cylinder (16) is provided on the key cylinder (16) so as to be movable in the radial direction between an engagement position for connecting the key cylinder (16) and the driving member (18) and a separation position for releasing the connection. Latch member (19), and a projection (26) engaged in a recess (31) formed in the housing (11), and the sleeve (13) rotates relative to the housing (11). When the protrusion (26) moves from the recess (31) of the housing (11), the protrusion (26) moves inward in the radial direction within the sleeve (13) to move the latch member (19) to the separation position in the radial direction. Release member (20) that moves to the
Release spring (2) pressing release member (20) against (11)
8) and locking projections (56, 64) are provided, and the locking projections (56, 64) are interlocked with the latch member (19) that moves between the engagement position and the separation position. ) In which the engaging protrusion (56, 64) is radially moved between a locking position fitted in the fitting groove (11a) and a release position separated from the fitting groove (11a). Joint material
(55, 61).

In an embodiment of the present invention, there is provided an engagement spring (60) for urging the engagement member (55) toward the locking position,
The engagement member (55) is held at the release position by the latch member (19) at the engagement position against the elasticity of the engagement spring (60), and when the latch member (19) is moved to the separation position. Is moved to the locking position by the elastic force of the engagement spring (60). The engaging member (55) includes a hook portion (58) that contacts the lug (22a) of the latch member (19), and the latch spring (27) generates a greater elastic force than the engaging spring (60), Member (19)
Is the latch spring located in the key cylinder (16)
It is urged against the drive member (18) by (27). Engagement member
(55) is slidably disposed in a slit (52) formed in the driving member (18), and is released by the releasing member (20).
When the key cylinder (16) is moved to the separation position and the key cylinder (16) is rotated, the engaging member (55) in the locked position fixes the driving member (18) to the housing (11), and the key cylinder (16) is rotated. ), The sleeve (13) and the latch member (19) are rotated without rotating the drive member (18). Spring receiving part (22) of latch member (19)
Is the latch spring located in the key cylinder (16)
(27) is urged against the drive member (18), and the release member (2
0) protrudes in the axial direction and latches when using different types of keys.
A projection (25) is provided to abut the (19).

In another embodiment of the present invention, the engaging member (55)
Is connected to the latch member (19) and slidably disposed in a radial groove (52) formed in the drive member (18). When the protrusion (26) of the release member (20) moves from the recess (31) of the housing (11), the locking portion (20a) of the release member (20) engages with the key cylinder (16), Due to the rotation of the key cylinder (16), the projection (26) of the release member (20) is fitted into the recess (31) of the housing (11), and is always positioned at the proper position. Engaging member (6
1) is a connection hole (65) for receiving the lug (22a) of the latch member (19).
When the engaging member (61) is in the locking position, the lug (22a) of the latch member (19) and the connecting hole (65) are connected to the lug (22a) by the connecting hole.
It is arranged on the center axis of the key cylinder (16) so as to be relatively rotatable in (65).

[0011]

[Operation] When the key is not inserted into the key cylinder (16), the key cylinder (16) and the sleeve (13) are connected by the tumbler (17), and the latch member (19) is connected to the key cylinder (1).
6) and the driving member (18) are in the engagement position for coupling. When a regular key is inserted into the key cylinder (16) in this state, the tumbler (17) retracts into the key cylinder (16), and the engagement between the key cylinder (16) and the sleeve (13) is released. When the key is rotated, the key cylinder (16) is rotated together with the key while the sleeve (13) is fixed to the housing (11) together with the release member (20). At this time, the driving member (20) connected to the key cylinder (16) by the latch member (19) is rotated to the lock position or the unlock position with the rotation of the key cylinder (16). Thereafter, when the rotational force of the key is removed, the drive member (20) and the key cylinder (16) are automatically returned to the initial position by the elasticity of the return spring (32).

When a different key is inserted into the key cylinder (16), the key cylinder (16) is inserted into the sleeve via the tumbler (17).
(13) is held in a state of engagement. When you rotate the key,
The key cylinder (16) rotates integrally with the sleeve (13). At this time, the release member (20) moves in the radial direction with respect to the housing (11), the connection between the latch member (19) and the drive member (18) is released, and the engagement member (55) is released. It moves radially from the separation position to the engagement position, and the locking projections (56, 64)
The driving member (18) is fixed to the housing (11) by being engaged with the fitting groove (11a) of (11). Therefore, the driving member (18)
Cannot be rotated to the locked or unlocked position. As described above, since the driving member (18) is normally connected to the key cylinder (16) via the latch member (19), when a regular key is used, the key cylinder (16) is provided without a play angle. The drive member (18) can be immediately rotated by the rotation of ()). Further, since the latch member (19), the release member (20), and the engagement member (55) all move in the radial direction, the present invention does not significantly increase the axial length of the cylinder lock (10). The cylinder lock (10) can be manufactured to have substantially the same size as a conventional cylinder lock.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cylinder lock according to the present invention will be described below with reference to FIGS.

A cylinder lock 10 according to the present invention includes a housing 11 having a first accommodation hole 12,
A sleeve 13 rotatably arranged in the first accommodation hole 12 and having a second accommodation hole 14 and a locking portion 15; and a plurality of sleeves rotatably arranged in the second accommodation hole 14 of the sleeve 13. A key cylinder 16 having a slot 16a,
A tumbler 17 slidably disposed within the key cylinder 16 and engageable with the locking portion 15 of the sleeve 13, and a driving member 18 rotatably provided with respect to the housing 11.
And a latch member 19 movably provided between an engagement position for connecting the key cylinder 16 and the drive member 18 and a separation position for releasing the connection. And a release member 20 for moving the latch member 19 to the separation position when rotated. As shown in FIG. 7, the release member 20 disposed in the groove 13 a of the sleeve 13 has a pair of legs 2 formed in a groove shape.
4, a projection 25 projecting in the axial direction of the key cylinder 16 and abutting on the latch member 19 when a different key is used, a projection 26 projecting in the radial direction, and a pair of notches 16c of the key cylinder 16 provided opposite to each other. And a pair of engaging portions 20a provided. A release member 20 is disposed slidably in the radial direction in a groove 13a formed in the inner end portion of the sleeve 13 in the radial direction.

A cap 40 is attached to a front portion of the housing 11, and an E-ring 2 is attached to a rear portion of the key cylinder 16.
9 prevents the key cylinder 16 from falling off. As shown in FIG. 1, the latch member 19 is formed in a cylindrical portion 16 b of the key cylinder 16 with a latch hole 2 formed in a radial direction.
1, the spring receiving portion 22 of the latch member 19 is always urged radially outward with respect to the drive member 18 by the latch spring 27 arranged in the key cylinder 16. The latch member 19 has a spring receiving portion 22 with which a latch spring 27 abuts, a connecting portion 23 engaged with a groove 30 formed in the driving member 18, and protrudes from the spring receiving portion 22 on the side opposite to the connecting portion 23. And a lug 22a. The latch hole 21 has a receiving surface 21a on which the latch spring 27 is arranged, and an enlarged portion 21b of the entrance where the latch member 19 is arranged. Latch hole 21
As shown in FIG. 8, the latch member 19 disposed in the inside normally protrudes from the latch hole 21 and is engaged with the groove 30 formed in the drive member 18, and the latch member 19 is disposed at the engagement position. As described above, the connecting portion 23 of the latch member 19 connects the key cylinder 16 and the driving member 18 in the rotation direction.

Since the projection 25 of the release member 20 does not normally come into contact with the connecting portion 23 of the latch member 19 which receives the elastic force of the latch spring 27, the key cylinder 16 can be smoothly rotated when a proper key is used. However, when a different type of key is used, the protrusion 25
The projection 25 of the release member 20 engages with the key cylinder 16. Further, the release member 20 is pressed by the release spring 28 and the first
Abuts on the inner wall forming the receiving hole 12. When the key cylinder 16 is rotated using a regular key, the key cylinder 16 and the release member 20 rotate integrally, so that the projection 26 of the release member 20 is fitted into the recess 31 of the housing 11 and Always positioned in state. As shown in FIG. 1, the recess 31 extends lengthwise toward the front of the housing 11 and communicates with the opening 11 b.
The water that has entered the inside is drained to the outside through the recess 31 and the opening 11b. When the sleeve 13 is rotated with respect to the housing 11, the convex portion 26 is pushed out from the concave portion 31, and
Since the latch member 19 moves inward in the radial direction, the latch member 19 moves inward in the radial direction against the elasticity of the latch spring 27, and the connecting portion 23 of the latch member 19 becomes the enlarged portion 21 b of the latch hole 21.
And the connection with the driving member 18 is released. The key cylinder 1 is inserted into a through hole 33a formed in the lever 33.
Six cylindrical portions 16 b are arranged, and the cylindrical portion 16 b of the key cylinder 16 can freely rotate relative to the lever 33. Further, a pair of protrusions 5 formed on the driving member 18 are provided.
3 is fitted in a pair of engagement holes 37 formed in the lever 33, and the lever 33 is rotated integrally with the drive member 18. The lever 33 is rotatably attached to the cylindrical portion 16b of the key cylinder 16 by an E-ring 29, and is operatively connected to a lock device (not shown). The end of the lever 33 is bent to form a locking portion 34. A return spring 32 that automatically returns the driving member 18 to the initial position when the driving member 18 is rotated is provided outside the housing 11. One end 32a and the other end 3 of the return spring 32
2b is a projection 36 formed on the outside of the housing 11,
The lever 33 is disposed so as to sandwich the locking portion 34.

The driving member 18 has a cylindrical hole 51 formed in the axial direction and receiving the cylindrical portion 16b of the key cylinder 16,
Slit 52 formed radially in communication with cylindrical hole 51
And a projection 53 protruding in the axial direction. The cylindrical hole 51 communicates with a radial groove 30 formed in the driving member 18. An engagement member 55 is slidably disposed in the slit 52. As shown in FIG. 9, the engaging member 55 formed in a substantially C shape is provided with a fitting groove 11 a formed in the housing 11.
The lug 22a of the latch member 19 and a pair of guide protrusions 57 slidably disposed in a guide recess 52a formed in communication with the slit 52 of the drive member 18 A hook portion 58 provided so as to be abuttable on the opposite side in diameter from the locking projection 56. One guide projection 57 is constantly urged outward by an engagement spring 60 disposed in the drive member 18, and the lug 22 a is attached to the cylindrical portion 16 b of the key cylinder 16 by the lug 22 a.
As long as it does not move into the latch hole 21 formed in the
2a. The engagement member 55 moves between the engagement position shown in FIG. 8 and the separation position shown in FIG.
In conjunction with the movement of the movement, it is moved between the release position shown in FIG. 9 and the locking position shown in FIG. Therefore, at the release position shown in FIG. 9, the locking projection 56 is separated from the fitting groove, and at the locking position shown in FIG. 12, the locking projection 56 fits into the fitting groove 11a. The engagement spring 60 urges the engagement member 55 toward the locking position. As shown in FIG. 9, the engaging member 55 is held at the release position of FIG. 9 by the lug 22a of the latch member 19 in the engaged position against the elasticity of the engagement spring 60, and the latch member 19 is released. When it is moved to the separation position in FIG. 12 by the radial inward movement of FIG. 12, it is moved to the locking position by the elastic force of the engagement spring 60, and the locking projection 56 is fitted into the fitting groove 11a. Therefore, the latch spring 27 generates a larger elastic force than the engagement spring 60,
The latch member 19 is urged against the groove 30 of the drive member 18 by a latch spring 27 arranged in the latch hole 21 of the key cylinder 16.

In the above configuration, when the key is not inserted into the key cylinder 16, the key cylinder 16 and the sleeve 1
3 is connected by a tumbler 17, and as shown in FIG. 8, the latch member 19 is at an engagement position for connecting the key cylinder 16 and the driving member 18. When a regular key is inserted into the key cylinder 16 in this state, the tumbler 1
7 is retracted into the key cylinder 16 and the key cylinder 16
And the sleeve 13 is released from engagement. When the key is rotated, the key cylinder 16 is rotated together with the key while the sleeve 13 is fixed together with the release member 20. At this time, since the driving member 18 is connected to the key cylinder 16 by the latch member 19, the driving member 18 and the lever 33 are rotated to the lock position or the unlock position with the rotation of the key cylinder 16. Thereafter, when the rotational force of the key is removed, the lever 33, the driving member 18 and the key cylinder 16 are automatically returned to the initial position by the elasticity of the return spring 32.

When a different type of key is inserted into the key cylinder 16, the key cylinder 16 is kept engaged with the sleeve 13 via the tumbler 17. When you rotate the key,
The key cylinder 16 rotates integrally with the sleeve 13. When the key cylinder 16 is rotated, the release member 20 moves from the non-rotation position shown in FIG. 7 to the rotation preparation position shown in FIG.
As a result, the latch member 19 is moved from the engagement position shown in FIGS. 1 and 8 to the separation position shown in FIG. 10 inward in the radial direction, and the locking portion 20a of the release member 20 is moved to the notch 1 of the key cylinder 16.
6c. As a result, the connection between the latch member 19 and the groove 30 of the driving member 18 is released, and the engaging member 55 moves in the radial direction from the separation position in FIG. 9 to the engagement position in FIG. 56 is the fitting groove 11 of the housing 11
a, and the driving member 18 is fixed to the housing 11. Therefore, the key cylinder 16 and the driving member 18
Is released, the driving member 18 cannot be rotated to the locked position or the unlocked position. Thus, the key cylinder 16, the sleeve 13, and the latch member 19 are rotated without rotating the driving member 18. Since the driving member 18 is usually connected to the key cylinder 16 via the latch member 19, when the regular key is used, the driving member 18 is immediately rotated by the rotation of the key cylinder 16 without providing a play angle. Can be. Further, since the latch member 19, the release member 20, and the engagement member 55 all move in the radial direction, the cylinder lock of the present invention can be replaced with a conventional cylinder lock without significantly increasing the axial length of the cylinder lock. It can be manufactured to almost the same size.

The embodiment of the present invention is not limited to the above-described embodiment, and various changes can be made. For example, FIG.
As shown in FIG. 18 to FIG. 18, in another embodiment of the present invention, the engaging member 61 is slidably disposed in the radial groove 30 formed in the driving member 18. The end 63 of the driving member 18 is inserted and fixed in the through hole 33 a of the lever 33. The engagement member 61 includes a connection hole 65 that receives the lug 22 a of the latch member 19, and a locking projection 64 that can be fitted into the fitting groove 11 a of the housing 11. The locking projection 64 is the fitting groove 1
When the engaging member 61 is moved to the locking position fitted to 1a, as shown in FIG.
The connection hole 65 a and the lug 22 a are arranged on the center axis of the key cylinder 16 so that the lug 22 a can rotate inside the connection hole 65.

The drive member 1 is provided without the lever 33.
A switch for generating an electric signal by the rotation of 8 may be operated. Further, in the above embodiment, an example in which a disk tumbler is used as the tumbler 17 has been described, but a pin tumbler can be used. Release spring 28
May be omitted and the release member 20 may be pressed by the latch spring 27 that presses the latch member 19.

[0022]

As described above, according to the present invention, a cylinder lock having a large resistance to destruction can be obtained, so that crimes such as unauthorized intrusion or theft can be effectively prevented. Further, in the cylinder lock of the present invention, the key cylinder and the drive member are always connected, and no component that moves in the axial direction is provided in the cylinder lock, and a preliminary rotation required for connection with the drive member is required. do not do. Therefore, when a regular key is inserted into the key cylinder and rotated, the drive member can be rotated immediately, and a cylinder lock excellent in durability and operability can be obtained. For this reason, the number of sliding parts is smaller than that of the related art, so that the failure of the cylinder lock can be reduced and the life can be extended. Further, since no component that moves in the axial direction is required, the overall length of the cylinder lock can be reduced, and the front surface does not need to be firmly formed.

[Brief description of the drawings]

1 is a sectional view of the cylinder lock according to the present invention, taken along the line AA in FIG. 2;

FIG. 2 is a front view of a cylinder lock according to the present invention.

FIG. 3 is a side view of a cylinder lock according to the present invention.

FIG. 4 is a rear view of the cylinder lock according to the present invention.

FIG. 5 is an exploded perspective view of the cylinder lock according to the present invention shown in FIG. 1;

FIG. 6 is a sectional view taken along the line BB of FIG. 1 with the key cylinder removed;

FIG. 7 is a sectional view taken along the line CC of FIG. 1;

FIG. 8 is a sectional view taken along the line DD in FIG. 1;

FIG. 9 is a sectional view taken along the line EE in FIG. 1;

FIG. 10 is a cross-sectional view taken along line DD of FIG. 1 when a different type of key is used.

FIG. 11 is a cross-sectional view taken along line CC of FIG. 1 when a different type of key is used.

FIG. 12 is a sectional view taken along the line EE in FIG. 1 when a different key is used;

FIG. 13 is a sectional view of a cylinder lock showing another embodiment of the present invention.

FIG. 14 is an exploded perspective view of a cylinder lock showing another embodiment of the present invention.

FIG. 15 is a sectional view taken along the line DD in FIG. 13;

FIG. 16 is a sectional view taken along the line EE in FIG. 13;

FIG. 17 is a diagram showing DD in FIG. 13 when a different key is used;
Sectional view along the line

FIG. 18 shows EE in FIG. 13 when different types of keys are used.
Sectional view along the line

[Explanation of symbols]

10. . 10. cylinder lock; . Housing, 11a. .
11. fitting groove; . 12. first receiving hole; . Sleeve, 1
4. . Second receiving hole, 15. . Locking part, 16. . Key cylinder, 17. . Tumbler, 18. . Drive member, 1
9. . Latch member, 20. . Release member, 21. . Latch holes, 55, 61. . Engagement member, 56, 64. . Locking projection, 60. . Engagement spring,

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-189534 (JP, A) JP-A-5-33534 (JP, A) JP-A-5-59850 (JP, A) JP-A-7-189534 259400 (JP, A) Hira 1-67267 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05B 29/04 E05B 17/20 E05B 27/04

Claims (8)

(57) [Claims] 1. A housing having a first receiving hole, a sleeve rotatably disposed in the first receiving hole of the housing and having a second receiving hole and a locking portion, and a second receiving portion of the sleeve. A key cylinder rotatably disposed within the hole, a tumbler slidably disposed within the key cylinder and engageable with the locking portion of the sleeve, and a drive rotatably provided with the key cylinder relative to the housing. A latch member provided on the key cylinder movably in a radial direction between an engagement position for connecting the key cylinder and the driving member and a separation position for releasing the connection, A protrusion engaged with a recess formed in the housing, wherein the protrusion moves from the recess of the housing when the sleeve is rotated relative to the housing, whereby A release member for moving the latch member radially inwardly to move the latch member to the separation position, a release spring for pressing the release member against the housing, Interlocking with the latch member that moves between the separation position, the locking projection is between the locking position where the locking projection is fitted into the fitting groove formed in the housing and the release position where the locking projection is separated from the fitting groove. And an engaging member that is moved in the radial direction. 2. An engaging spring for urging the engaging member toward the locking position, wherein the engaging member is held at the release position by a latch member at the engaging position against the elasticity of the engaging spring. The cylinder lock according to claim 1, wherein when the latch member is moved to the separation position, the latch member is moved to the locking position by the elastic force of the engagement spring. 3. The engaging member includes a hook portion that abuts a lug of the latch member. The latch spring generates a greater elasticity than the engaging spring, and the latch member is formed by a latch spring disposed in the key cylinder. The cylinder lock according to claim 2, which is biased against the driving member. 4. The engaging member is slidably disposed in a slit formed in the driving member, and is in the locking position when the release member moves the latch member to the separation position and rotates the key cylinder. The cylinder lock according to any one of claims 1 to 3, wherein the engagement member fixes the drive member to the housing, and the key cylinder, the sleeve, and the latch member are rotated without rotating the drive member. 5. The spring receiving portion of the latch member is urged against the drive member by a latch spring disposed in the key cylinder, and the release member projects in the axial direction and comes into contact with the latch member when a different key is used. 2. The method according to claim 1, further comprising:
The cylinder lock according to the above. 6. The cylinder lock according to claim 1, wherein the engagement member is connected to the latch member and slidably disposed in a radial groove formed in the drive member. 7. When the projection of the release member moves from the recess of the housing, the locking portion of the release member engages with the key cylinder, and the projection of the release member fits into the recess of the housing by rotation of the key cylinder. The cylinder lock according to claim 1, wherein the cylinder lock is engaged and is always positioned at a regular position. 8. The engagement member includes a connection hole for receiving a lug of the latch member. When the engagement member is in the locking position, the lug and the connection hole of the latch member rotate relatively within the connection hole. 7. The cylinder lock according to claim 6, wherein the cylinder lock is disposed on the center axis of the key cylinder as much as possible.