JP3333168B2 - Electronic lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic lock for an opening / closing door which is locked / unlocked by an input operation such as an IC card, a magnetic card, and a ten-key pad. Regarding few electronic locks.

[0002]

2. Description of the Related Art Conventionally, an electronic lock that locks and unlocks a deadbolt by driving a micromotor out of a door-side end face as shown in FIG. 1 includes a micromotor and a reduction mechanism driven by a gear of the micromotor. An operating gear device connected to the speed reduction mechanism, a locking gear / unlocking gear selectively connected to the planetary gear of the operating gear device, and a dead cam connected to the locking / unlocking gear. There is known an operating plate which is reciprocated linearly by the dead cam and a deadbolt which moves integrally with the operating plate (Japanese Patent Laid-Open No. 7-197708).

The locking gear / release gear is provided with projection teeth for projecting a swing arm rotatably supporting the planetary gear to an intermediate position between the two gears. The planetary gear is provided during locking / release. Is disposed at an intermediate position between the two gears, so that the dead bolt and the micromotor are mechanically separated from each other. Therefore, the load of the micromotor is not applied, and the deadlock can be protruded and retracted from the door side end face by operating the cylinder lock independently.
It can be easily done.

[0004]

However, a disengagement mechanism using the planetary gear to cut off the rotational transmission force between the micromotor and the dead cam swings the planetary gear to reduce the rotational force to the next locking gear or unlocking gear. When transmitting to the gear, it is necessary to apply a strong brake to the planetary gear. There is a problem that the braking force acts as a load on the micromotor and greatly affects the battery life as a power supply. An electronic lock according to the present invention is proposed to solve such a problem.

[0005]

The gist of the present invention for solving the above-mentioned problems of the electronic lock according to the present invention is that an electronic lock in which a deadbolt is locked or unlocked via an output gear driven by a reduction gear mechanism. In the lock, at least one of the gear meshed with the output gear and the output gear in the reduction gear mechanism is required to rotate the output gear to a rotation position where the output gear is locked or unlocked. Missing gears engraved with the correct number of teeth ,
The output gear is a first coaxially formed and integrally formed first gear.
One output gear formed into an output gear and a second output gear;
Is a means for positioning the locking / unlocking position .

[0006] The gear at the last stage comprises a first output gear and a second output gear.
It is provided corresponding to the output gear, and among the gears, the gear meshing with the output gear of the positioning means is provided with teeth for locking / unlocking positioning.

According to the electronic lock of the present invention, the last gear of the reduction gear mechanism rotates the output gear to a desired rotational position by the rotation of the motor. Since at least one of the final stage gear and the output gear is a missing gear, the engagement between the final stage gear and the output gear is broken after the required rotation. Thereafter, the output gear rotates to the locked or unlocked position by the urging force of the open leg spring and stops. Therefore, in the locked state or the unlocked state of the electronic lock, the output gear and the reduction gear mechanism are mechanically disconnected from each other, so that the thumb turn is loaded from the inside of the door and the cylinder lock is loaded from the outside of the door. Can be rotated with less. The motor is only subjected to a normal driving load, and there is no load for applying a braking force for a planetary gear unlike the conventional example. The output gear is divided into a first output gear and a second output gear, and one of the output gears serves as positioning means for setting a locked / unlocked position. The deadbolt can be normally protruded and retracted from the side of the door even when the door is placed in an abnormal position. Further, even when the thumb turn or the cylinder lock is manually rotated, the final stage gear is a missing gear, so that there is no engagement.

[0008]

Next, an electronic lock A according to the present invention will be described with reference to the drawings. The electronic lock A is shown in FIG.
As shown in (a), (b) and (c), a reader 3 which is attached to the opening / closing door 1 and reads a record of a recording section of the IC card 2 on the outside of the door 1, and a door-side end surface 1a It has an emergency unlocking cylinder lock 5 for locking and unlocking the dead bolt 4 protruding and retracting from the outside, and a lever handle 7 for locking and unlocking the latch 6.

On the other hand, as shown in FIG. 1C, a control device 8 for processing the data read by the reader 3 to drive the lock B, a battery case 18, and a deadbolt 4 are provided inside the room. Thumb Turn 9, which locks and unlocks independently,
A lever handle 7a (locked and integrally formed with the lever handle 7) for locking and unlocking the latch 6;

The lock B is shown in FIGS. 2 and 3 (a),
As shown in (b), a DC motor 10 for driving, a reduction gear mechanism 11 rotationally driven by the motor 10,
The final stage pinion gear 11 in the reduction gear mechanism 11
a first output gear 12 which is intermittently driven by the rotation of the first output gear 12, and a second output gear 13 which is rotated integrally with the first output gear 12
A snap spring 15 as an open leg spring locked to the locking portion 12b of the first output gear 12 and the locking portion 14 of the lock box housing; and the rotated first output gear 12 locks and unlocks. Unlock detection switch 16 for detecting that the lock position has been reached by rotation
And a lock detection switch 17.

A pinion gear 11a in the reduction gear mechanism 11, a pinion gear 11b for rotating integrally with the pinion gear 11a and positioning a locking / unlocking position;
The configuration and meshing relationship between the first output gear 12 and the second output gear 13 which is a means for positioning the locking / unlocking position will be described. As shown in FIG. 4, the output gears 12 and 13 and the pinion gear 11 are not used except when driven by the DC motor 10 so that they can be locked and unlocked by the cylinder lock 5 or the thumb turn 9.
It is necessary to release the engagement with a and 11b. Therefore, as shown in FIG. 4 (a), the first output gear 12 and the pinion gear 11a are provided at a plurality of angles within a required range so as to secure a moving amount necessary for locking and unlocking the dead bolt 4. The teeth 12c and 11c are provided, and the others are missing.

As shown in FIG. 4B, the second output gear 13, which is a locking / unlocking position locating means, has locking and unlocking positioning teeth 13a, 13a on its circumference.
b is provided, and a projection 13c is provided at an intermediate portion between the teeth 13a and the teeth 13b so as to match the height of the teeth 13a and 13b. On the other hand, the pinion gear 11b, which is the last gear meshing with the second output gear 13, has positioning teeth that mesh only when the second output gear 13 is in the normal locking position / unlocking position. 11d and 11e are provided at a predetermined angle. The positional relationship shown in FIGS. 4A and 4B shows a normal state, and the teeth 13a and 13b
And the teeth 12c are formed integrally correspondingly, and the teeth 11d and 11e of the pinion gear 11b and the pinion gear 11a
And the corresponding teeth 11c are integrally formed.

The second output gear 13 and the pinion gear 11
b is provided on the first output gear 1 as shown in FIG.
2 is in an abnormal state, the rotation of the pinion gear 11a drives the teeth 12c and 11c.
Are provided to prevent the first output gear 12 from rotating less than the required rotation angle due to the meshing of the first output gear 12 and the amount of protrusion and removal of the deadbolt 4 being excessive or insufficient.

That is, as shown in FIG. 5A, if the first output gear 12 is in an abnormal state (slightly rotating counterclockwise as a locking direction), the first output gear 12 rotates together with this. The second output gear 13 is also in an abnormal state, as shown in FIG. Here, if the pinion gears 11a and 11b rotate simultaneously by the drive of the DC motor 10, the teeth 11e of the pinion gear 11b collide with the projection 13c and cannot mesh.

Therefore, the first and second output gears 12 and 13 stop in a state where they do not rotate, and this is stopped by the control device 8.
Automatically controls the DC motor 10 so that the pinion gears 11a and 11b are rotated in the reverse direction.

The first and second output gears 12, 13 are positioned at normal positions by the reverse rotation of the pinion gears 11a, 11b. Thereafter, the DC motor 10 is again rotated in a predetermined direction by the control device 8, thereby causing the first output gear 1 to rotate.
The second tooth 12c and the tooth 11c of the pinion gear 11a mesh with each other at a normal position, so that the dead bolt 4 is properly protruded and retracted.

The snap spring 15 is connected to the first output gear 1.
After the first output gear 12 is rotated by a predetermined amount by the pinion gear 11a, the first output gear 12 is further rotated in the rotation direction by the urging force of the spring to position the first output gear 12 at a predetermined position. is there.

The unlock detection switch 16 is such that the switch leaf spring 16a is pushed in, for example, by the switch operating portion 12d of the first output gear 12, and the switch is electrically turned ON / OFF. Further, as shown in FIGS. 3A and 7A, the lock detection switch 17
Locking portion 1 of first output gear 12 positioned at a predetermined position
The leaf spring 17a is pushed, for example, by the outer peripheral convex portion 2 so that the switch is electrically turned ON / OFF.

According to the electronic lock A configured as described above,
By rotating the DC motor 10 in a predetermined direction by the control device 8, the first output gear 12 is rotated by a required amount by the pinion gear 11a of the missing gear.
The first output gear 12 is positioned at a predetermined position by the urging force. As a result, the dead bolt 4 is attached to the side end surface 1 of the door 1.
a.

3, 6 and 7, as an example of locking, a reduction gear mechanism 11, a pinion gear 11a, a first output gear 12, a snap spring 15, an unlock detection switch 16, and a lock detection switch 17 are provided. In the transition from the unlocked state to the locked state, each movement is shown so as to be grasped. The operation is reversed from the locked state to the unlocked state. The rotation of the first output gear 12 causes the thumb turn 9 to rotate in the same direction at the same time. The dead bolt 4 is moved by the first output gear 12 and is mechanically connected to the dead bolt 4. Is turned.

The first output gear 12 and the pinion gear 1
By setting 1a as a missing gear, no extra load is applied to the DC motor 10, normal battery driving is enabled, and the battery life is extended. Further, the locking / unlocking operation of the deadbolt 4 can be independently performed manually by the cylinder lock 5 from the outside of the door 1 and the thumb turn 9 from the inside of the door 1.

[0022]

As described above, the electronic lock according to the present invention relates to an electronic lock in which a dead bolt is locked or unlocked via an output gear driven by a reduction gear mechanism. In the mechanism, at least one of the gear meshed with the output gear and the output gear is engraved with the number of teeth necessary to rotate the output gear to a rotation position where the output gear is locked or unlocked. The output gear is formed coaxially with the missing gear.
First and second output gears formed integrally with each other
And one of the output gears is in the locked / unlocked position.
Since a determined unit not only allows manual operation by thumb or the like, Ru is prolonged relief to battery life load of the drive motor. In addition, manual operation
Even if the output gear is in an incorrect position,
It has an excellent effect that it can be locked and unlocked .

Also, the last stage gear is provided corresponding to the first output gear and the second output gear, and among the gears, the gear meshing with the output gear of the positioning means is locked / unlocked. Since the positioning gears are provided, when the output gear is at an abnormal position, the output gear can be rotated in the reverse direction under the control of the control device to position the output gear at the normal position.

[Brief description of the drawings]

FIG. 1 is a front view (a), a side view (b), and a rear view (c) of a state in which an electronic lock according to the present invention is mounted on a door.

FIG. 2 is a partially detailed side view showing the electronic lock according to the present invention in a partially disassembled state.

FIGS. 3 (a) and 3 (b) are mechanism detailed explanatory views of the electronic lock according to the present invention as viewed from a thumb turn side. FIGS.

FIGS. 4A and 4B are explanatory views (A) and (B) showing the meshing relationship between an output gear and a pinion gear in the electronic lock of the present invention.

FIGS. 5A and 5B are explanatory diagrams (a) and (b) showing the meshing relationship between the output gear and the pinion gear in the electronic lock according to the present invention, in a case where the electronic lock is abnormal.

FIGS. 6A and 6B are explanatory diagrams (A) and (B) showing a meshing relationship between an output gear and a pinion gear in the electronic lock according to the present invention, and showing a transition from an unlocked state to a locked state.

FIGS. 7A and 7B are explanatory diagrams (A) and (B) showing a meshing relationship between an output gear and a pinion gear in the electronic lock according to the present invention, showing a state where the state is shifted from an unlocked state to a locked state.

[Explanation of symbols]

1 door, 2 IC card, 3 reader, 4 dead bolt, 5 cylinder lock, 6 latch, 7, 7a lever handle, 8 control device, 9 thumb turn, 10 D
C motor, 11a, 11b Pinion gear, 11c
Teeth, 11d, 11e teeth, 12 first output gear, 12b
Locking portion, 12c teeth, 13 second output gear, 13a,
13b tooth, 13c projection, 14 locking part, 15 snap spring, 16 unlock detection switch, 16a switch leaf spring, 17 lock detection switch, 17a leaf spring, A electronic lock, B lock.

Claims (2)

(57) [Claims] 1. An electronic lock in which a dead bolt is locked or unlocked via an output gear driven by a reduction gear mechanism, wherein a gear meshed with the output gear in the reduction gear mechanism and an output gear. And at least one of the gears is formed as a missing gear engraved with the number of teeth required to rotate the output gear to a rotation position where the output gear is locked or unlocked , and the output gear is , Coaxially installed and integrally formed
One output gear formed on the first output gear and the second output gear;
The gear is used as a means for positioning the locking / unlocking position.
And an electronic lock characterized by the above. 2. The gear of the last stage in the speed reduction mechanism is a first output gear.
A power gear and a second output gear;
Gears that mesh with the output gear of the positioning means in the car
The electronic lock according to claim 1 , further comprising teeth for locking / unlocking positioning .