JPH0533534A - Cylinder lock - Google Patents

Abstract

PURPOSE:To allow a key cylinder of a cylinder lock to completely freely rotate when the lock is unlocked incorrectly. CONSTITUTION:There are provided a latch means 19 provided movably between an engaging position where a key cylinder 16 and a lever 18 are connected and a separation position where said connection is disconnected and a disengaging means 20 which moves the means 19 to the separation position when a sleeve 15 is rotated relative to a housing 12. When a right key is inserted into the key cylinder 16, the cylinder 16 and the sleeve 15 are disengaged and a slider 21 is in engagement with a recess 23 of the cylinder 16, so that the lever 18 is rotated to a lock position or an unlock position following the rotation of the cylinder 16. When a key of different kind is inserted into the cylinder 16, the cylinder 16 and the sleeve 15 are simultaneously turned in the same direction, so that the means 20 is actuated to move the latch means 19 to the separation position.

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 A conventional cylinder lock can rotate a regular key into a locked position or an unlocked position on 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 prevented by the tumbler engaging with the groove in the case, there is a risk that the tumbler is broken and the lock is unlocked. Therefore,
For example, as disclosed in Japanese Unexamined Patent Publication No. 1-315569, a free-wheel cylinder lock has been proposed in which the key cylinder freely rotates in the case of improper unlocking in which a rotational force is applied to the key cylinder. There is. This cylinder lock comprises 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 is rotated relative to the sleeve. be able to. This allows the sliding ring to engage the lock piece actuating member to operate the locking device. Also, when a key of a different type is inserted into the key cylinder, the key cylinder is held in a state of being engaged with the sleeve by the tumbler, so the key cylinder is slid.
Rotate with Bub. 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, the key cylinder freely rotates when different kinds of keys are used. For this reason, it is not possible to apply a rotational force that destroys the tumbler, and thus it is possible to give a large resistance to the destruction.

[0005]

By the way, Japanese Patent Laid-Open No. 1-
The locking 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, the key that is rotated in the lock device.
A torsion spring is provided between the front plate and the key cylinder to automatically return the cylinder to the initial position. When a different kind 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, when the key cylinder rotates more than a certain angle, the torsion spring restricts the rotation of the key cylinder. Therefore, there is a risk that the torsion spring will be damaged or destroyed.
However, if the torsion spring is not provided, the key cylinder does not automatically return to the initial position when the key cylinder is rotated by using a regular key, so that the remote locking or unlocking operation is performed. Has the drawback that it becomes difficult. 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 with the lever. 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, an object of the present invention is to solve the above-mentioned drawbacks and to provide a cylinder lock in which a key cylinder can be completely freely rotated at the time of illegal unlocking.

[0008]

A cylinder lock according to the present invention includes a housing having a first accommodation hole, a second accommodation hole rotatably disposed in the first accommodation hole of the housing, and a locking portion. With a sleeve, a key cylinder rotatably arranged in a second accommodation hole of the sleeve, a tumbler slidably arranged in the key cylinder and engageable with a locking portion of the sleeve, and And a latch device movably provided between an engagement position for connecting the key cylinder and the lever and a separation position for releasing the connection, and a sleeve for the housing. And a disengagement device that moves the latch device to the disengaged position when relatively rotated. The latch device has a slider slidably provided on a key cylinder or a lever, a slider spring for pressing the slider, and a recess formed on the lever or the key cylinder and into which the end of the slider is fitted. The end of the slider,
A taper is formed in the recess into which the end of the slider is fitted. The disengagement device is provided on the sleeve so as to be slidable in the radial direction, and has a follower having an end portion that abuts on the cam surface of the housing, a follower spring that presses the follower outward in the radial direction, and is rotatable. A release lever having one end pivotally attached to the sleeve and connected to the follower and the other end connected to the latch device.
The latch device moves to the engagement position or the separation position in response to the movement of the follower. The slider of the latch device is slidably provided on the lever, and the recess is formed in the key cylinder. The slider of the latch device is slidably provided on the key cylinder, and the recess is formed in the lever. An inner recess is formed on the cam surface of the housing, and the follower is fitted into the recess of the key cylinder when the follower is separated from the inner recess. The disengagement device provides a moderating feel as the sleeve rotates.

A return spring is provided in the housing recess which automatically returns the lever to its initial position when the lever is rotated. One end and the other end of the return spring are respectively locked to the first contact portion and the second contact portion of the lever fitted to the outside of the housing. A first cutout portion and a second cutout portion are formed adjacent to the first contact portion and the second contact portion, and the outer circumference of the housing corresponds to the first cutout portion and the second cutout portion. A first recess and a second recess are formed in the portion, and one end and the other end of the return spring are movable in the first notch and the first recess and the second notch and the second recess, respectively. Housing is first
It has the 1st annular convex part and the 2nd annular convex part in which the concave part and the 2nd concave part were each formed, and a concave part is formed between the 1st annular convex part and the 2nd annular convex part. .

In another embodiment of the invention, the disengagement device is a follower radially slidably mounted on the housing and having an end abutting against the cam surface of the sleeve.
A follower spring that presses the follower outward in the radial direction, and a release lever that is rotatably attached to the housing and has one end connected to the follower and the other end connected to the latch device are provided. . The latch device moves to the engagement position or the separation position in response to the movement of the follower.

[0011]

When the key is not inserted into the key cylinder, the key cylinder and the sleeve are connected by the tumbler, and the latch device is in the engaging position for connecting the key cylinder and the lever. When the regular key is inserted into the key cylinder in this state, the tumbler is retracted into the key cylinder, and the engagement between the key cylinder and the sleeve is released.
The sleeve is held in the initial position by the disengagement device. Therefore, when the key is rotated, the key cylinder is rotated together with the key while the sleeve is fixed. At this time, since the lever is connected to the key cylinder by the latch device, it is rotated to the lock position or the unlock position as the key cylinder rotates. After that, when the rotational force of the key is removed, the lever and the key cylinder are automatically returned to the initial position by the elastic force of the return spring.

When different kinds of keys are inserted into the key cylinder,
The key cylinder is held in engagement with the sleeve via the tumbler. Therefore, when the key is rotated, the key cylinder rotates integrally with the sleeve. At this time, the disengagement device provided between the sleeve and the housing is activated to move the latch device to the separation position where the connection between the key cylinder and the lever is released. Therefore, the lever cannot be rotated to the locked position or the unlocked position.

[0013]

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 12 having a first housing hole 11 and a housing 12.
A sleeve 15 rotatably arranged in the first accommodation hole 11 of the sleeve and having a second accommodation hole 13 and a locking portion 14, and a key rotatably arranged in the second accommodation hole 13 of the sleeve 15. A cylinder 16; a tumbler 17 slidably arranged in the key cylinder 16 and engageable with the locking portion 14 of the sleeve 15; a lever 18 rotatably provided with respect to the housing 12; Lever 18
And a latching device 19 movably provided between an engaging position for connecting and a separating position for releasing the connection, and a latching device 19 when the sleeve 15 is rotated relative to the housing 12. And a disengagement device 20 for moving the A flange portion 15a having a groove 15b formed in the radial direction is formed on the inner end portion of the sleeve 15.

A cap 27 is attached to the front of the housing 20, 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. 5, the latch device 19 includes a lever 18
A slider 21 slidably provided on the key cylinder 16, a slider spring 22 for pressing the slider 21 against the key cylinder 16, and a slider 2 formed on the key cylinder 16
The recess 23 into which the end 21a of the first connector is fitted, and the follower 24
Has a recess 29 into which the inner end of the can fit. Slider 21
A taper is formed in the concave portion 23 into which the end portion 21a of the slider 21 and the end portion 21a of the slider 21 are fitted. The slider 21 has a protrusion 21b movable in the groove 15b of the sleeve 15,
A protrusion 21c that can be fitted into the recess 12h of the housing 12 is formed. The slider 21 of the latch device 19 is slidably provided in the guide groove 18a of the lever 18.

As shown in FIG. 3, the disengagement device 20 is provided on the sleeve 15 so as to be slidable in the radial direction, and has a follower 24 having an end 24a that abuts on the cam surface 12a of the housing 12, and the follower 24. And a follower spring 25 that presses the outer side in the radial direction, and a follower 2 that is rotatably attached to the sleeve 15 by a shaft 28.
4 is provided with a release lever 26 having one end connected to 4 and the other end engageable with the protrusion 21b of the slider 21 forming the latch device 19. The slider 2 of the latch device 19
1 is pressed radially inward by a spring 22. When the follower 24 moves inward in the radial direction, one end of the release lever 26 moves inward in the radial direction, and the other end of the release lever 26 moves outward in the radial direction. Therefore, the slider 21 of the latch device 19 is moved radially outward, and the end 21a of the slider 21 is separated from the recess 23 of the key cylinder 16. At this time, the protrusion 21c of the slider 21 is fitted into the recess 12h of the housing 12 to prevent rotation. Therefore, the engagement between the key cylinder 16 and the lever 18 is released. An inner recess 12b is formed in the cam surface 12a of the housing 12, and when the follower 24 is fitted in the inner recess 12b, the latch device 19 is moved to the engagement position, and the follower 24 is in the cam surface 12a other than the inner recess 12b. The latch device 19 is moved to the separated position. The disengagement device 20 provides a moderation when the sleeve 15 rotates.

When the lever 18 is rotated, the lever 18
Return spring 3 that automatically returns the to the initial position
0 is provided in the outer recess 12c of the housing 12. As shown in FIG. 6, one end 30a of the return spring 30
And the other end 30b are respectively locked to the first contact portion 18c and the second contact portion 18d of the lever 18 fitted to the outside of the housing 12. First contact portion 18c and second contact portion 18d
A first cutout portion 18e and a second cutout portion 18f are formed adjacent to the first cutout portion 18e, and a first outer recess 12d is formed in the outer peripheral portion of the housing 12 corresponding to the first cutout portion 18e and the second cutout portion 18f.
And the second outer recess 12e are formed, and one end 30a and the other end 30b of the return spring 30 move in the first cutout 18c, the first outer recess 12d, the second cutout 18d, and the second outer recess 12e, respectively. It is possible. As shown in FIG. 2, the housing 12 includes a first outer recess 12d and a second outer recess 12d.
First annular protrusions 1 each having an outer recess 12e
2f and 2nd annular convex part 12g, 1st annular convex part 1
An outer recess 12c is formed between 2f and the second annular protrusion 12g.

In the above structure, when the key is not inserted into the key cylinder 16, the key cylinder 16 and the sleeve 1
5 is connected by a tumbler 17,
The latch device 19 is in an engagement position that connects the key cylinder 16 and the lever 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 key cylinder 16 and the sleeve 15
Is disengaged. Sleeve 15 is spring 25
It is held in the initial position by the follower 24, which is pressed radially into the inner recess 12b of the housing 12 toward the outside. Therefore, when the key is rotated, the key cylinder 16 is rotated together with the key with the sleeve 15 fixed while the follower 24 is fitted in the inner recess 12b as shown in FIG. At this time, since the slider 21 that is pressed radially inward by the spring 22 is engaged with the inside of the recess 23 of the key cylinder 16, the lever 18 is rotated to the lock position or the unlock position as the key cylinder 16 rotates. It After that, when the rotational force of the key is removed, the lever 18 and the key cylinder 16 are automatically returned to the initial position by the elastic force of the return spring 30.

When a different type of key is inserted into the key cylinder 16, the key cylinder 16 is held in a state of being engaged with the sleeve 15 via the tumbler 17. Therefore, when the key is rotated, the key cylinder 16 rotates together with the sleeve 15. At this time, the follower 24 is separated from the inner concave portion 12b and slides on the cam surface 12a, and the inner end of the follower 24 is fitted into the concave portion 29 of the key cylinder 16. Therefore, one end of the release lever 26 is radially inward. Be moved to. For this reason,
The other end of the release lever 26 is moved radially outward, and the slider 21 is moved radially outward via the protrusion 21b of the slider 21. Therefore, the protrusion 21b of the slider 21 is separated from the recess 23 of the key cylinder 16, and the slider 2
The first projection 21b is locked to the outer peripheral portion of the flange portion 15a of the sleeve 13. Therefore, as shown in FIG. 8, the slider 21 is disengaged from the key cylinder 16, and is moved and held at the separation position. When the key cylinder 16 is further rotated, the protrusion 21b of the slider 21 will move to the key cylinder 16
Is fitted into the recess 23 next to the
The engagement between the protrusion 21b and the concave portion 23 is released when is separated from the outer concave portion 12b again. Therefore, as shown in FIG. 9, when using different keys, the lever 18 cannot be continuously rotated to the lock position or the unlock position. That is, when the key cylinder 16 and the sleeve 15 are simultaneously rotated in the same direction, the disengagement device 20 operates and the latch device 19 is moved to the separated position. The embodiments of the present invention are not limited to the above-mentioned embodiments, and various modifications can be made. The above embodiment shows an example in which the latch device 19 is provided on the lever 18 and the disengagement device 20 is provided on the sleeve 15.

However, as shown in FIGS. 10 to 12, the latch device 19 may be attached to the key cylinder 16 instead of the lever 18. That is, the slider 21 slidably provided on the key cylinder 16 and having the recess 21c.
The latch device 19 may be configured by a slider spring 22 that biases the slider 21 to the outside, and a semi-annular convex portion 18b formed on the lever 18. Slider 21
The shoulder portion 21d of the lever abuts on the other end of the release lever 26.
When using a regular key, the slider 21 has a convex portion 18b.
When the different types of keys are used, the follower 24 is moved inward in the radial direction and the other end of the release lever 26 is moved outward, so that the slider 21 is also moved outward. It For this reason, since the convex portion 18b penetrates the concave portion 21c, the slider 21 does not rotate the lever 18 to the lock position or the unlock position.

Further, as shown in FIGS. 13 to 15, the follower 24 and the follower spring 25 of the disengagement device 20.
Instead of being provided on the sleeve 15, the housing 12 may be provided and the cam surface 24 a may be formed on the sleeve 15. That is, the end 24a provided on the housing 12 so as to be slidable in the radial direction and abutting against the cam surface 15c of the sleeve 15.
A follower 24 having the following, a follower spring 25 for pressing the follower 24 radially outward, a slider 21 constituting the latch device 19 and one end rotatably attached to the housing 12 and connected to the follower 24. The engagement release device 20 may be configured by the release lever 26 having the other end connected thereto. Also in this case, the lever 1
A semi-annular convex portion 18b is formed on the slider 8, and a concave portion 21c is formed on the slider 21. When a regular key is used, the slider 21 contacts the convex portion 18b to rotate the lever 18 as shown in FIG. 15, but when a different type of key is used, the follower 24 is moved radially outward and released. Since the other end of the lever 26 is moved inward, the slider 21 is also moved radially inward. For this reason, since the convex portion 18b penetrates the concave portion 21c, the slider 21 does not rotate the lever 18 to the lock position or the unlock position.

Further, in the above embodiment, the example in which the disk tumbler is used as the tumbler 17 is shown, but it is also possible to use the pin tumbler. Further, the concave portion 23 may be formed not in the key cylinder 16 but in a rotating member which rotates integrally with the key cylinder 16.

[0023]

As described above, according to the present invention, since a cylinder lock having a great resistance to breakage can be obtained, it is possible to effectively prevent a crime such as illegal 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 lever are always connected, and therefore the preliminary rotation required for connecting the lever is not required. Therefore, the rotation of the key cylinder is directly converted into the rotation of the lever, and no extra operation is required. 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 it does not require axially moving parts,
The overall length of the cylinder lock can be shortened.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a cylinder lock according to the present invention.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

5 is a sectional view taken along the line CC of FIG.

FIG. 6 is a partial side view of the lever.

FIG. 7 is a cross-sectional view showing a state in which a key cylinder is rotated with a regular key.

FIG. 8 is a cross-sectional view showing a state immediately after rotation of the key cylinder by the different keys.

FIG. 9 is a cross-sectional view showing a state in which the key cylinder is further rotated with a different key.

FIG. 10 is a sectional view showing another embodiment of the present invention.

11 is a sectional view taken along the line AA of FIG.

12 is a sectional view taken along the line BB of FIG.

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

14 is a sectional view taken along the line AA of FIG.

FIG. 15 is a sectional view taken along the line BB of FIG.

[Explanation of Codes] 10. ． Cylinder lock, 11. ． 1st accommodation hole, 12. ．
Housing, 12a. ． Cam surface, 13. ． Second accommodation hole, 14. ． Locking part, 15. ． Sleeve, 16. ． Key cylinder, 17. ． Tumbler, 18 ... Lever, 1
9. ． Latch device, 20. ． Disengagement device, 21. ． Slider, 21a. ． End, 22. ． Slider spring, 23. ． Recess, 24. ． Follower, 24a. ． Edge, 25. ． Follower spring, 26. ． Release lever,

Claims (11)

[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, a lever rotatably provided with respect to the housing, and a key The latch device is movably provided between an engagement position for connecting the cylinder and the lever and a separation position for releasing the connection, and a latch device when the sleeve is rotated relative to the housing. A cylinder lock provided with an engagement releasing device for moving to a separation position. 2. The latch device comprises a slider slidably provided on a key cylinder or a lever, a slider spring for pressing the slider, and a recess formed in the lever or the key cylinder and into which the end of the slider is fitted. The cylinder lock according to claim 1, which has. 3. The cylinder lock according to claim 1, wherein a taper is formed in an end portion of the slider and a concave portion into which the end portion of the slider is fitted. 4. The disengagement device includes a follower, which is provided on the sleeve so as to be slidable in the radial direction, and has an end portion that abuts on the cam surface of the housing, and a follower spring that presses the follower outward in the radial direction. A release lever having one end pivotally mounted on the sleeve and connected to the follower and the other end connected to the latch device,
The cylinder lock according to claim 1, wherein the latch device moves to the engagement position or the separation position in response to the movement of the follower. 5. The cylinder lock according to claim 1 or 2, wherein the slider of the latch device is slidably provided on the lever, and the recess is formed in the key cylinder. 6. The cylinder lock according to claim 1, wherein the slider of the latch device is slidably provided on the key cylinder, and the recess is formed on the lever. 7. The cylinder lock according to claim 4, wherein an inner recess is formed on the cam surface of the housing, and the follower is fitted into the recess of the key cylinder when the follower is separated from the inner recess. 8. The cylinder lock according to claim 4, wherein the disengagement device provides a moderation sensation when the sleeve rotates. 9. A lever in which a return spring that automatically returns the lever to an initial position when the lever is rotated is provided in a recess of the housing, and one end and the other end of the return spring are fitted to the outside of the housing. Of the first contact portion and the second contact portion, respectively, the first notch portion and the second notch portion are formed adjacent to the first contact portion and the second contact portion, respectively. The first recess and the second recess are formed in the outer peripheral portion of the housing in correspondence with the first cutout and the second cutout.
The cylinder lock according to claim 1, wherein a recess is formed, and one end and the other end of the return spring are movable in the first notch and the first recess, and the second notch and the second recess, respectively. 10. The housing has a first annular projection and a second annular projection having a first recess and a second recess, respectively, and the first annular projection and the second annular projection. The cylinder lock according to claim 9, wherein a recess is formed between the cylinder lock and the lock. 11. The disengagement device includes a follower provided in a housing slidably in a radial direction and having an end portion abutting against a cam surface of a sleeve, and a follower spring for pressing the follower radially outward. A release lever rotatably pivotally mounted on the housing and connected to the follower and having another end connected to the latch device, the latch device corresponding to the movement of the follower at the engagement position or The cylinder lock according to claim 1, which moves to the separation position.