JP3380611B2 - 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 locking device, and more particularly to a cylinder lock having a large resistance to breakage.

[0002]

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

When a regular key is inserted into the key cylinder, the tumbler in the key cylinder is disengaged from the groove formed in the sleeve and the key cylinder can be rotated relative to the sleeve. This allows the sliding ring to engage the lock piece actuating member to operate the locking device. Further, when a different type of key is inserted into the key cylinder, the key cylinder is held in the state of being engaged with the sleeve by the tumbler, so that the key cylinder rotates together with the sleeve. As a result, the locking piece actuating member cannot be rotated, and the locking device cannot be operated.

In such a free-turn type cylinder lock, when different kinds of keys are used, the key cylinder freely rotates, so that it is not possible to apply a rotational force that destroys the tumbler, and therefore a large resistance force against the destruction. Can be given.

[0005]

By the way, Japanese Patent Laid-Open No. 1-
The lock device disclosed in Japanese Patent No. 315569 has a drawback that the key cylinder cannot be operated smoothly after a different type of key is used. That is, in order to automatically return the rotated key cylinder to the initial position, a torsion spring is provided in the lock device between the front plate and the key cylinder. When a dissimilar 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 key spring rotates more than a certain angle, the torsion spring restricts the rotation of the key cylinder, and there is a risk that the torsion spring is damaged or destroyed. Without a torsion spring, the key cylinder does not automatically return to its initial position when the key cylinder is rotated using a regular key, making remote locking or unlocking difficult. is there. Further, in the lock device disclosed in the above publication, since the torsion spring is provided in the front part of the lock device, there is a risk of freezing in a cold region.

Further, in the conventional free-turn type cylinder lock, it is necessary to insert a regular key and rotate the key cylinder at a constant angle to connect the key cylinder. Since the lever does not rotate at all during this rotation, a large rotation angle is required to rotate the lever to a predetermined lock position or unlock position, including a connection operation with the lever. Further, since the sliding parts are interposed between the connecting operations, the parts are worn. Further, since the sliding parts have to be moved in the axial direction of the key cylinder, there is a problem that the total length of the cylinder lock cannot be shortened.

Therefore, the present invention provides a cylinder lock which has no parts to be moved when a regular key is used, has good durability and operability, and is capable of completely freely rotating the key cylinder at the time of illegal unlocking. To aim.

[0008]

A cylinder lock according to the present invention has a housing (11) having a first accommodating hole (12), and is rotatable within the first accommodating 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 (rotatably disposed in the second accommodation hole (14) of the sleeve (13) ( 16) and key cylinder (16)
Is arranged slidably within and the locking portion (15) of the sleeve (13)
A tumbler (17) engageable with the drive member (18) rotatably provided with respect to the housing (11) by rotation of the key cylinder (16), the key cylinder (16) and the drive member (18) And a latch member (19) provided on the key cylinder (16) so as to be movable between an engagement position for connecting and the separation position for releasing the connection, and movable in a radial direction within the sleeve (13). And a release member (20) for moving the latch member (19) to the separated position when the sleeve (13) is rotated relative to the housing (11) and the release member (20). And a spring (28) that presses against (11). The release member (20) has a protrusion (26) which is engaged with a recess (31) formed in the housing (11). When the sleeve (13) is rotated with respect to the housing (11), the protrusion (26) of the release member (20)
Moves from the recess (31) of the housing (11), and the release member (2
(0) moves inward in the radial direction and is pressed by the moving release member (20) .The latch member (19) moves in the radial direction to release the connection between the latch member (19) and the drive member (18). It In the embodiment of the present invention, the latch member (19) is formed in a substantially L shape by the spring receiving portion (22) and the connecting portion (23).
(22) is biased against the drive member (18) by the latch spring (27) arranged in the key cylinder (16), and the release member
The (20) is provided with a projection (25) which projects in the axial direction and does not normally abut the latch member (19). However, when the different key is used, the projection (25) of the release member (20) contacts the latch member (19).

When using a different key, the protrusion of the release member (20)
When the key cylinder (16) is engaged with the key cylinder (16) and then the key cylinder (16) is rotated using a regular key, the protrusion (26) of the release member (20) causes the housing (11) to move. It is fitted in the concave portion (31) and is always positioned in the regular position. housing
The recess (31) of (11) extends in the length direction toward the front of the housing (11), and the opening (11b) formed in the housing (11).
The water that has entered the housing (11) and has entered the housing (11) is drained to the outside through the recess (31) and the opening (11b). When the key cylinder (16) is rotated with the key to the locked or unlocked position and the rotational force of the key is removed, the drive member (18)
Also, the key cylinder (16) is automatically returned to the initial position by the elasticity of the return spring (32).

[0010]

[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) moves to the key cylinder (1
It is in the engagement position for connecting 6) and the drive member (18). 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 by the release member (20).
At this time, since the drive member (18) is connected to the key cylinder (16) by the latch member (19), it is rotated to the lock position or the unlock position as the key cylinder (16) rotates. After that, when the rotational force of the key is removed, the driving member (1
8) and the key cylinder 16 are automatically returned to the initial position by the elastic force of the return spring 32.

When a different type of key is inserted into the key cylinder (16), the key cylinder (16) is inserted through the tumbler (17) into the sleeve.
It is held in the state of being engaged with (13). When you rotate the key,
The key cylinder (16) rotates integrally with the sleeve (13). At this time, the release member (20) moves radially inward with respect to the housing (11), and the latch member (19) pressed by the moving release member (20) moves radially to cause the latch member ( Since the connection between the drive member (18) and the drive member (18) is released, the drive member (18)
Cannot be rotated to the locked or unlocked position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 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 and a housing 11.
A sleeve 13 that is rotatably arranged in the first accommodation hole 12 and has a second accommodation hole 14 and a locking portion 15, and a key that is rotatably arranged in the second accommodation hole 14 of the sleeve 13. A cylinder 16; a tumbler 17 slidably arranged in the key cylinder 16 and engageable with the locking portion 15 of the sleeve 13; a drive member 18 rotatably provided with respect to the housing 11; And a latch member 19 movably provided between an engagement position for connecting the drive member 18 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 separated position when the sleeve 13 is rotated relative to the housing 11. The inner end of the sleeve 13 is provided with a groove 13a formed in the radial direction.

A cap 38 is attached to the front of the housing 11, and an E ring 2 is attached to the rear of the key cylinder 16.
9 is attached to prevent the key cylinder 16 from falling off. As shown in FIG. 1, the latch member 19 is disposed together with a spring 27 in a latch hole 21 formed in the key cylinder 16 in the radial direction, and is constantly urged outward by the spring 27 toward the outside in the radial direction. The latch member 19 is formed in a substantially L shape by the spring receiving portion 22 and the connecting portion 23. The latch hole 21 has a deep cylindrical portion 21a in which the spring 27 is arranged and an enlarged portion 21b in the inlet portion in which the latch member 19 is arranged. As shown in FIG.
The latch member 19 arranged in the latch hole 21 normally projects from the latch hole 21 and is formed in the groove 3 formed in the driving member 18.
It is in the engagement position for engaging 0. Therefore, the latch member 1
The connecting portion 23 of 9 connects the key cylinder 16 and the drive member 18 in the rotational direction.

The release member 20 arranged in the groove 13a of the sleeve 13 has a pair of groove-shaped legs 24, a projection 25 projecting in the axial direction of the key cylinder 16, and a projection projecting in the radial direction. 26 and. The protrusion 25 is the spring 2
Since it does not normally come into contact with the connecting portion 23 of the latch member 19 which receives the elastic force of 7, the key cylinder 16 can be smoothly rotated when a regular key is used. However, when the dissimilar key is used, the protrusion 25 abuts on the connecting portion 23 of the latch member 19. Further, the release member 20 is pressed by the spring 28 and comes into contact with the inner wall of the housing 11 forming the accommodation hole 12. When the sleeve 13 does not rotate, the convex portion 26 of the release member 20 is fitted into the concave portion 31 formed in the accommodation hole 12. As shown in FIG. 1, since the recess 31 extends in the length direction toward the front of the housing 11 and communicates with the opening 11b, the water that has entered the housing 11 passes through the recess 31 and the opening 11b to the outside. Be drained. When the sleeve 13 is rotated with respect to the housing 11, the convex portion 26 is pushed out of the concave portion 31 and moves inward in the radial direction, so that the latch member 19 moves inward in the radial direction against the elasticity of the spring 27. The connecting portion 23 of the latch member 19 is disposed inside the enlarged portion 21b of the latch hole 21, and the connection with the driving member 18 is released. The pair of protrusions 35 formed on the drive member 18 are fitted into the pair of engagement holes 37 formed on the lever 33, and the lever 33 is rotated integrally with the drive member 18, but the lever 33 is moved by the E ring 29. It is rotatably attached to the end of the key cylinder 16 and is operatively connected to a lock device (not shown). The end portion of the lever 33 is bent to form the locking portion 34. Drive member 18
A return spring 32 is provided outside the housing 11 that automatically returns the drive member 18 to the initial position when the is rotated. One end 32 of the return spring 32
The a and the other end 32b are arranged so as to sandwich the protrusion 36 formed on the outside of the housing 11 and the locking portion 34 of the lever 33.

In the above configuration, when the key is not inserted in the key cylinder 16, the key cylinder 16 and the sleeve 1
3 is in a state of being connected by a tumbler 17, and as shown in FIG. 3, the latch member 19 is in an engaging position for connecting the key cylinder 16 and the drive member 18. If you insert a regular key into the key cylinder 16 in this state, the tumbler 1
7 retracts into the key cylinder 16,
Is disengaged from the sleeve 13. When the key is rotated, the key cylinder 16 is rotated together with the key while the sleeve 13 is fixed by the release member 20. At this time, since the latch member 19 connects the key cylinder 16 to the drive member 18 by the spring 27 as shown in FIG. 3, the drive member 18 and the lever 33 are locked or unlocked as the key cylinder 16 rotates. Is rotated into position. After that, when the rotational force of the key is removed, the lever 3
3, the drive member 18 and the key cylinder 16 are automatically returned to the initial position by the elastic force of the return spring 32.

When a different type of key is inserted into the key cylinder 16, the key cylinder 16 is inserted into the tumbler 1 as shown in FIG.
It remains held in engagement with the sleeve 13 via 7. Therefore, when the key is rotated, the key cylinder 1
6 rotates together with the sleeve 13. At this time, as shown in FIG. 6, the release member 20 rotates together with the sleeve 13 and is pushed out of the recess 31 formed in the housing 11 against the elastic force of the spring 28 and moved inward in the radial direction. Therefore, as shown in FIGS.
The latch member 19 is also pressed to the inner separation position by the protrusion 25 of 0, and is disposed in the latch hole 21.
The engagement between 9 and the drive member 18 is released. Therefore, the key cylinder 16 rotates together with the sleeve 13, but the drive member 18 is held stationary, and the lever 33 cannot rotate to the locked position or the unlocked position. When the dissimilar key is used, the protrusion 25 of the releasing member 20 engages with the key cylinder 16, and when the key cylinder 16 is rotated by using a regular key thereafter, the protrusion 26 of the releasing member 20.
Is fitted into the concave portion 31 of the housing 11 and is always positioned in the regular position.

[0018]

As described above, according to the present invention, since the driving member is held stationary and the key cylinder rotates when a different type of key is used, a cylinder lock having a large resistance against breakage can be obtained, which is illegal. It is possible to effectively prevent crime such as intrusion or theft. Further, in the cylinder lock of the present invention, when the regular key is inserted into the key cylinder and rotated, the key cylinder and the drive member are always connected, so that preliminary rotation necessary for connecting the drive member is not necessary. That is, since a component that moves in the axial direction when a regular key is used is not provided in the cylinder lock, a cylinder lock excellent in durability and operability can be obtained. For this reason, the number of sliding parts is smaller than in the conventional case, and the failure of the cylinder lock can be reduced and the life can be extended. Furthermore, since there is no need for a component that moves in the axial direction, the total length of the cylinder lock can be shortened, and it is not necessary to form the front surface firmly.

[Brief description of drawings]

FIG. 1 is a sectional view of a cylinder lock according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an exploded perspective view of the cylinder lock according to the present invention shown in FIG.

FIG. 5 is a cross-sectional view of a cylinder lock according to the present invention when using dissimilar keys.

6 is a sectional view taken along line AA of FIG.

7 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

10. ． Cylinder lock, 11. ． Housing, 11
b. ． Opening, 12. ． First accommodation hole, 13. ． Sleeve, 14. ． Second accommodation hole, 15. ． Locking part,
16. ． Key cylinder, 17. ． Tumbler, 1
8. ． Drive member, 19. ． Latch member, 20. ． Release member, 21. ． Latch hole, 22. ． Spring receiving part,
23. ． Connection part, 25. ． Protrusion, 26. ． Convex part,
27. ． Latch spring, 28. ． spring,
31. ． Recess,

Claims (6)

(57) [Claims] 1. A housing having a first accommodation hole, a sleeve rotatably disposed in the first accommodation hole of the housing and having a second accommodation hole and a locking portion, and a second accommodation of the sleeve. A key cylinder rotatably arranged in the hole, a tumbler slidably arranged in the key cylinder and engageable with a locking portion of the sleeve, and rotatably provided with respect to the housing by rotation of the key cylinder. In a cylinder lock provided with a drive member, a latch member movably provided on the key cylinder between an engagement position for connecting the key cylinder and the drive member and a separation position for releasing the connection, and a sleeve. A release member that is radially displaceable within and that moves the latch member to a separated position when the sleeve is rotated relative to the housing; A release member having a spring that presses against the housing, and a protrusion that engages in a recess formed in the housing is formed on the release member, and when the sleeve is rotated with respect to the housing, the protrusion of the release member The release member moves inward in the radial direction, the latch member pressed by the moving release member moves in the radial direction, and the connection between the latch member and the drive member is released. Cylinder lock. 2. The latch member is formed into a substantially L-shape by the spring receiving portion and the connecting portion, and the spring receiving portion is biased against the drive member by a latch spring arranged in the key cylinder. The cylinder lock according to claim 1, wherein the release member includes a protrusion that protrudes in the axial direction and does not normally contact the latch member. 3. The cylinder lock according to claim 2, wherein the projection of the release member projects in the axial direction and abuts on the latch member when the dissimilar key is used. 4. When the dissimilar key is used, the projection of the release member engages with the key cylinder, and when the key cylinder is subsequently rotated using the regular key, the projection of the release member becomes the recess of the housing. The cylinder lock according to claim 1, wherein the cylinder lock is fitted and is always positioned in a regular position. 5. The recess of the housing extends in the lengthwise direction toward the front of the housing, communicates with an opening formed in the housing, and water that has entered the housing drains outside through the recess and the opening. The cylinder lock according to claim 1. 6. The driving member and the key cylinder are automatically moved to the initial position by the elastic force of the return spring when the rotational force of the key is removed after the key cylinder is rotated to the locked position or the unlocked position together with the key. The cylinder lock according to any one of claims 1 to 5, which is returned.