JPH07207995A - Cylinder lock of lever tumbler type - Google Patents

Abstract

PURPOSE:To enable key code change to be carried out freely by providing a plurality of tumblers in an inner cylinder, and changing a key unlocking position through change of mating position between first and second tumblers. CONSTITUTION:In changing a key code, a proper key to a present key code is inserted and an inner cylinder 12 is turned to the change position. A first tumbler shaft 15 moves along a guide groove and moves in a long hole of a partitioning board 11 to cancel engagement between a tooth part 14b and a tooth part 16a for tumblers 14, 16. A new key code key is inserted and then the second tumbler 16 is moved backwards in the opposite direction in correspondence with the depth of cut by means of a first leaf spring 17. The inner cylinder 12 is thereafter returned to the original position and the respective tooth parts of the tumblers 14, 16 are engaged and thus a new key code is set. It is thus possible to improve a burglar proof characteristic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lever tumbler type cylinder lock capable of converting a key code only by a key conversion operation without disassembling the lock.

[0002]

2. Description of the Related Art Generally, when building a new house, it is a problem from the viewpoint of crime prevention that the landlord uses the key that a carpenter or a person involved in the construction process used during the construction period, even after the construction work is completed. Also, in a rental condominium or apartment, when the resident is replaced, the old resident may have a copy of the key, and it was necessary to exchange the lock for security reasons. However, if the locks were changed each time, there was a drawback that the cost would be high. Therefore, various pin tumbler locks that can change the key code by key operation have been conventionally proposed. For example, a code conversion pin is provided between the tumbler pin and the driver pin, and when the key code is converted, the code conversion pin is transferred to a pin hole provided at a position different from the normal locking / unlocking position. Things exist.

[0003]

By the way, in the above-mentioned conventional pin tumbler lock, the realistic tumbler diameter dimension must be larger than the plate thickness of the lever tumbler in terms of strength, and the depth dimension of the cylinder lock is There was a drawback that it had to be taken big. Also, as compared to the lever tumbler lock in which the key cutout amount is enlarged in the lever tumbler part to fit with the lock member, the movement amount of the tumbler of the pin tumbler lock is equal to the key cutout amount, so the same number of key differences are used. There was also a drawback in that the lock had to have a larger diameter than the lever tumbler lock in order to obtain it. Further, most of the lever tumbler locks capable of converting the key code are box-shaped locks, and even if they are cylinder locks, they are considerably large-sized with a circular gear incorporated therein.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cylinder lock of a lever tumbler system, which has been made in view of the above-mentioned drawbacks and which can convert a key code without disassembling a lock.

[0005]

A lever tumbler type cylinder lock according to the present invention comprises an outer cylinder, a plurality of tumblers rotatably inserted in the outer cylinder, and a partition plate for partitioning the tumblers. A lever tumbler type cylinder lock comprising a cylinder and a locking bar that is disposed in a part of the inner cylinder and is spring-biased so as to project in the outer cylinder direction, and includes a cutout recess for retracting the locking bar. A first tumbler having engaging teeth and rotatably supported by a first tumbler shaft, a tooth that can be engaged with and disengaged from the first tumbler, a first leaf spring, and a recess that abuts against a key mountain. A second tumbler rotatably supported on a second tumbler shaft, and a first tumbler and a second tumbler that support the rocking bar and are arranged adjacent to each other. A plurality of partition plates for partitioning the first tumbler shaft are arranged in the key insertion direction, and a tumbler shaft guide plate for supporting the first tumbler shaft at both ends is provided, and the outer cylinder houses a locking bar on its inner peripheral surface. It is provided with a plurality of concave portions. Further, the tumbler shaft guide plate has a tumbler shaft guide groove for guiding the end portion of the first tumbler shaft, and the tumbler shaft guide groove is provided with a meandering portion at a position facing the concave portion of the outer cylinder. is there.

[0006]

As described above, according to the lever tumbler type cylinder lock of the present invention, even if the lever tumbler type cylinder lock is used, the key code can be freely converted without disassembling the lock and the conventional key can be used. The size can be made almost the same as the cylinder lock that cannot convert the code.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical cross-sectional view of a lever tumbler type cylinder lock according to an embodiment of the present invention, FIG. 2 is a plan view showing a first tumbler used in the lever tumbler type cylinder lock, and FIG. FIG. 6 is a plan view showing a second tumbler used for the lever tumbler type cylinder lock. Here, the lever tumbler type cylinder lock includes an outer cylinder 10, a plurality of tumblers rotatably inserted in the outer cylinder 10, and a partition plate 11 for partitioning each tumbler, and supports a key insertion side. Inner cylinder 12 including an inner cylinder cap 30 and a second inner cylinder cap 32 that is formed integrally with the output shaft 31 and that supports the inner side thereof.
And a first tumbler shaft 15 penetrating through a locking bar 13 which is disposed in a part of the inner cylinder 12 and spring-biased so as to project toward the outer cylinder 10 and a shaft hole 14d of the plurality of first tumblers 14. And a second tumbler shaft 19 penetrating the shaft hole 16c of the second tumbler 16.

The outer cylinder 10 has a locking bar 13 on its inner peripheral surface.
It is provided with recesses 10a and 10b for accommodating. In the present embodiment, the recesses 10a and 10b are arranged at the position of 180 degrees, but they may be arranged at other positions. Also, the outer cylinder 1
0 on the front surface of the first inner cylinder cap 30.
Is formed with a hole 10c rotatably supported by
A tumbler shaft guide groove 22-1 is formed on the inner wall. Furthermore, a C-ring groove 10d for rotatably supporting and preventing the inner cylinder 12 from coming off is formed on the inner peripheral wall of the outer cylinder 10 (see FIG. 7B).

In the substantially central portion of the first inner cylinder cap 30,
A key hole 30b is formed, and a large diameter portion has a spring hole 30c for holding a spring 33 for urging the locking bar 13. Further, it has a hole 30c with which the second tumbler shaft 19 is engaged. Second inner cylinder cap 3
2 has a hole 32a formed symmetrically with the hole 30c formed in the first inner cylinder cap 30, and a spring hole 32b for holding a spring 33 for urging the locking bar 13. Further, an output shaft 31 is integrally formed at the rear end of the second inner cylinder cap 32.

As shown in FIG. 2, the first tumbler 14 is provided with a notch recess 14a for retracting the locking bar 13, an engaging tooth 14b and an engaging protrusion 14c, and a shaft hole 14d.
Is rotatably supported by the first tumbler shaft 15. Further, the engaging tooth portion 14b is formed as a part of the internal gear centering on the shaft hole 14d. As shown in FIG. 3, the second tumbler 16 includes the first tumbler 14
It has a tooth portion 16a which can be engaged and disengaged with, a first leaf spring 17, a concave portion 16b which comes into contact with a key ridge, and a shaft hole 16c which is rotatably supported by a second tumbler shaft 19. Therefore, when arranged in the outer cylinder 10, the first leaf spring 17 comes into contact with the inner circumference of the inner cylinder cover 20, and the second tumbler 16
Is urged to rotate counterclockwise. Further, the tooth portion 16a is an external gear having the shaft hole 16c as the center. Therefore, the first tumbler 14 and the second tumbler 16 mesh with each other by the engagement tooth portion 14b and the tooth portion 16a in the relationship of the internal gear and the external gear, and rotate about their respective axes. .

As shown in FIG. 4, the partition plate 11 has a cutout recess 11a for supporting the locking bar 13, a key hole 11b, and an elongated hole 1 into which the first tumbler shaft 15 is inserted.
1c and shaft hole 11d through which the second tumbler shaft 19 is inserted
A notch 11e with which the inner cylinder cover 20 engages is formed on the periphery of the first tumbler 1 and the first tumbler 1 adjacently arranged.
4 and the second tumbler 16 are each partitioned.

The tumbler shaft guide plate 21 is arranged at the rear end of the outer cylinder and is prevented from coming off by a C ring 34.
A tumbler shaft guide groove 22-2 that supports the inner end of the first tumbler shaft 15 is provided. The tumbler shaft guide groove 22-2 has a meandering portion 22a at a position facing the recess 10b of the outer cylinder 10. Therefore, the inside of the tumbler shaft guide groove 22-2 is set in the first tumbler shaft 15
When is rotated, the meandering portion 22a moves to the right in the figure (see FIG. 5).

As shown in FIGS. 6A and 6B, the inner cylinder cover 20 is an arc-shaped plate and has a plurality of cutout grooves 20a. A part of the outer periphery of the partition plate 11 fits into the notch groove 20a. In addition, before and after the inner cylinder cover 20, the eaves 20b are provided.
Are formed and are engaged with a part of the first inner cylinder cap 30 and the second inner cylinder cap 32.

FIG. 9 is a vertical cross-sectional view showing a state in which a key with a key mountain of No. 2 is inserted in a lever tumbler type cylinder lock. In this state, the cutout recess 14a of the first tumbler 14 is in the fitting position and can be unlocked. If the key is rotated as it is, the locking bar 13 is resisted by a spring force (not shown) as shown in FIG.
The inner cylinder 12 is rotated by retracting into a.

Further, in the present embodiment, when the key is rotated 180 degrees, the locking bar 13 is moved to the outer cylinder 1 as shown in FIG.
The first tumbler shaft 15 sliding in the tumbler shaft guide groove 22 at the same time when the first tumbler shaft 15 enters the 0 recessed portion 10b,
It rides on the meandering portion 22a and moves in the elongated hole 11c of the partition plate 11 to the right in the figure. When the first tumbler shaft 15 moves, the first tumbler 14 also moves to the right in the figure, and the engagement between the engaging tooth portion 14b and the tooth portion 16a is released. When the key is removed in this state, as shown in FIG. 12, the second tumbler 16 is moved in the direction of arrow A by the urging force of the first leaf spring 17.
In the direction of rotation about the second tumbler shaft 19.

FIG. 13 is a longitudinal sectional view showing the relationship between the first tumbler 14, the second tumbler 16 and the key groove when a blank key with no key ridges is inserted into a lever tumbler type cylinder lock. Is. Here, the notch recess 14a of the first tumbler 14 is at the position of the locking bar 13, and the locking bar 13 retracts here and can be unlocked.

FIG. 14 is a longitudinal section showing the relationship between the first tumbler 14, the second tumbler 16 and the key groove when a key with a dent depth of NO.1 is inserted in a lever tumbler type cylinder lock. It is a side view. The relationship between the first tumbler 14 and the second tumbler 16 here is combined so as to be unlocked with the No. 1 key.

FIG. 15 shows a lever tumbler type cylinder lock into which a key with a depth of 4 is inserted.
It is a longitudinal cross-sectional view which shows the relationship between the 1st tumbler 14, the 2nd tumbler 16, and a keyway. The relationship between the first tumbler 14 and the second tumbler 16 here is combined so as to be unlocked with the No. 4 key. As described above, in the lever tumbler type cylinder lock of the present invention, the key mountain can be freely set by changing the meshing position of the first tumbler 14 and the second tumbler 16. Therefore, by using the same component, the key mountain can be freely set.

Next, a method of using the lever tumbler type cylinder lock configured as described above will be described. First, when performing key code conversion, a key suitable for the current key code is inserted (see FIG. 10) and the inner cylinder 12 is rotated to the conversion position (FIG. 13). When the inner cylinder 12 is rotated to the conversion position, the first tumbler shaft 15 moves to the right in the drawing along the meandering portion 22a of the tumbler shaft guide grooves 22-1 and -2, as shown in FIGS. When the first tumbler shaft 15 moves in the elongated hole 11c of the partition plate 11 to the right in the figure, the second tumbler 16 remains as it is, and as shown in FIG. 13, the engaging teeth of the first tumbler 14 are engaged. The engagement between the portion 14b and the tooth portion 16a of the second tumbler 16 is released.

In this state, when a key with a new key code is inserted, the second tumbler 16, which was biased by the first leaf spring 17 in the direction of arrow A, corresponds to the depth of the notch. And retreat in the opposite direction. In this way, the positions of the plurality of second tumblers 16 move backward in accordance with the new key code depth.

When the inner cylinder 12 is returned to the original position in this state, the engaging tooth portion 14b of the first tumbler 14 and the tooth portion 16a of the second tumbler 16 are engaged, and a new key code is determined. To do. Tooth portion 14 for engagement of the first tumbler 14
The engagement between b and the tooth portion 16a of the second tumbler 16 is not released unless the key code conversion position is reached.

The present invention is not limited to the above embodiments, and various design changes can be made based on the technical idea of the present invention.

[0023]

As described in detail above, according to the lever tumbler type cylinder lock of the present invention, an outer cylinder, a plurality of tumblers rotatably inserted in the outer cylinder, and a partition for partitioning each tumbler. An inner cylinder with a plate,
A lever tumbler type cylinder lock comprising a locking bar which is disposed in a part of the inner cylinder and is biased by a spring so as to project in the outer cylinder direction, comprising a notch concave portion for retracting the locking bar and engaging teeth. A first tumbler rotatably supported by a first tumbler shaft, a tooth portion that can be engaged with and disengaged from the first tumbler, a first leaf spring, and a recess that abuts against the key ridge. A second tumbler rotatably supported by a second tumbler shaft, and a partition plate that supports the locking bar and divides the first tumbler and the second tumbler that are adjacently arranged. A plurality of keys are arranged in the key insertion direction, and a tumbler shaft guide plate that supports the first tumbler shaft at both ends is provided, and the outer cylinder has a plurality of recesses for accommodating the locking bars on its inner peripheral surface. Since a point, it is possible to carry out the conversion of the key code freely.

The tumbler shaft guide plate is the first
Has a tumbler shaft guide groove for guiding the end of the tumbler shaft, and a meandering portion is provided in the tumbler shaft guide groove at a position facing the concave portion of the outer cylinder, so that the engaging tooth portion 14b of the first tumbler 14 is provided. The engagement between the tooth portion 16a of the second tumbler 16 and the tooth portion 16a of the second tumbler 16 cannot be released unless the key code conversion position is reached.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a lever tumbler type cylinder lock that is an embodiment of the present invention.

FIG. 2 is a plan view showing a first tumbler used for the cylinder lock of the lever tumbler system.

FIG. 3 is a plan view showing a second tumbler used for the cylinder lock of the lever tumbler system.

FIG. 4 is a plan view showing a partition plate used in the lever tumbler type cylinder lock.

FIG. 5 is a plan view showing a tumbler shaft guide plate used for the cylinder lock of the lever tumbler system.

6A is a plan view showing an inner cylinder cover used for a lever tumbler type cylinder lock, FIG.
(B) is a front view of the inner cylinder cover.

FIG. 7 (A) is a cross sectional view in which a part of a lever tumbler type cylinder lock according to an embodiment of the present invention is omitted, and FIG. 7 (B) is a cross sectional view of an outer cylinder. .

FIG. 8 is a rear view of an outer cylinder used for the cylinder lock.

FIG. 9 is a longitudinal sectional view showing a key inserted state of the lever tumbler type cylinder lock.

FIG. 10 is a vertical cross-sectional view showing a state in which a key is inserted into the cylinder lock of the lever tumbler system and rotated by 90 degrees.

FIG. 11 is a vertical cross-sectional view showing a state (key code conversion position) in which a key is inserted into the lever lock tumbler type cylinder lock and rotated by 180 degrees.

FIG. 12 is a vertical cross-sectional view showing a state where a key is removed at a key code conversion position of the lever tumbler type cylinder lock.

FIG. 13 is a longitudinal sectional view showing a state in which a blank key is inserted in the lever tumbler type cylinder lock.

FIG. 14 is a vertical cross-sectional view showing a state in which a key with a dent depth of NO.1 is inserted in the lever lock tumbler type cylinder lock.

FIG. 15 is a vertical cross-sectional view showing a state in which a key having a dent depth of NO.4 is inserted into the lever lock tumbler type cylinder lock.

[Explanation of symbols]

 10 Outer Tube 10a, b Recess 10c Hole 10d C Ring Groove 11 Partition Plate 11a Notch Recess 11b Key Hole 11c Slot 11d Shaft Hole 11e Notch 12 Inner Tube 13 Locking Bar 14 First Tumbler 14a Notch Recess 14b Tooth for engagement 14c Engagement protrusion 14d Shaft hole 15 First tumbler shaft 16 Second tumbler 16a Tooth portion 16b Recess 16c Shaft hole 17 First leaf spring 19 Second tumbler shaft 20 Inner cylinder cover 20a Notch groove 20b eaves 21 tumbler shaft guide plate 22-1, -2 tumbler shaft guide groove 22a meandering portion 30 first inner cylinder cap 31 output shaft 32 second inner cylinder cap 33 spring 34 C ring

Claims (5)

[Claims] 1. An inner cylinder provided with an outer cylinder, a plurality of tumblers rotatably inserted in the outer cylinder, and a partition plate for partitioning the tumblers, and an outer cylinder provided in a part of the inner cylinder. In a lever tumbler type cylinder lock including a locking bar that is spring-biased so as to project in the cylinder direction, the tumbler is configured by combining a first tumbler and a second tumbler, and the first tumbler and the second tumbler are combined. A lever tumbler type cylinder lock, wherein the unlocking position of the tumbler is changed by changing the engaging position of the tumbler. 2. The lever tumbler type cylinder lock according to claim 1, wherein the inner cylinder is held by front and rear portions by first and second inner cylinder caps. 3. The lever tumbler type cylinder lock according to claim 1, wherein the inner cylinder is held at its periphery by an inner cylinder cover. 4. An inner cylinder having an outer cylinder, a plurality of tumblers rotatably inserted therein, and a partition plate for partitioning the tumblers, and an outer cylinder direction disposed in a part of the inner cylinder. In a lever tumbler type cylinder lock consisting of a locking bar that is spring-biased so as to project to, a locking dent recess for retracting the locking bar is provided, and an engaging tooth portion is provided so that the first tumbler shaft is rotatable. It has a first tumbler supported, a tooth part which can be engaged with and disengaged from the first tumbler, a first leaf spring, and a recess which abuts against the key ridge, and is rotatably supported by a second tumbler shaft. Supporting the second tumbler and the locking bar,
A plurality of partition plates that partition the first tumbler and the second tumbler that are adjacently arranged are arranged in the key insertion direction, and a tumbler shaft guide plate that supports the first tumbler shaft at both ends is provided. The lever tumbler type cylinder lock according to claim 1, wherein the outer cylinder is provided with a plurality of recesses on the inner peripheral surface thereof for accommodating the locking bars. 5. The tumbler shaft guide plate has a tumbler shaft guide groove for guiding the end of the first tumbler shaft, and the tumbler shaft guide groove is meandered inward at a position opposite to the recess of the outer cylinder. The lever tumbler type cylinder lock according to claim 2.