JP2786988B2 - Electric lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a locker or a safe,
The present invention relates to an electric lock used for a door of various facilities such as a house.

[0002]

2. Description of the Related Art Generally, an electric lock uses an electric motor or a solenoid as a driving source, and mechanically unlocks (emergency unlocking means) assuming a power failure or a failure of an electronic circuit. Is provided. As this emergency unlocking means, for example, conventionally, there has been a method for forcibly retracting the bar member while keeping the engagement between the electric motor and the reduction gear. As another conventional example, a method has been proposed in which the engagement between the electric motor and the reduction gear is disconnected by a clutch mechanism, and then the bar member is retracted mechanically.

[0003]

By the way, in the above-mentioned conventional emergency unlocking means for an electric lock, there is a method for forcibly retracting the bar member while keeping the engagement between the electric motor and the reduction gear, for example. Required a very large force to retract and was not suitable as an emergency unlocking means. Further, the method of mechanically retracting the bar member after the engagement between the electric motor and the reduction gear is disconnected by the clutch mechanism has a disadvantage that the structure is complicated and the device becomes large. Further, there is a problem as to whether or not the force from the drive motor can be reliably transmitted when the clutch is connected.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric lock which has a simple structure, can reliably turn on and off power from a drive source, and can be easily unlocked by mechanical means in an emergency. To provide.

[0005]

An electric lock according to the present invention comprises:
In an electric lock in which a bar member is projected and retracted by rotating the drive motor in the forward and reverse directions, the bar is projected from the lock box main body and integrally fixed to a bar member disposed so as to be retractable and a sliding plate supporting the bar member. a rack gear that drives Rutotomoni the locking bar, and the rack gear is fixed arranged on the rotating substrate
Normally, a drive motor engaged via a speed reduction mechanism and the rack substrate is rotated by rotating the rotation substrate around a support shaft.
Release the engagement between the car and the speed reduction mechanism and
Comprising a retraction causes the drive cam, an actuating rod for operating the drive cam, and a lock cylinder for driving the operating rod, usually at
The bar member is protruded and retracted by the drive motor.
The emergency causes, via a cylinder lock and the actuating lever to release the engagement between the rack gear and the speed reduction mechanism by rotating the drive cam, retracting the locking bar in the lock box body by the operation piece of the drive cam It is characterized by the following.

[0006]

As described above, according to the electric lock of the present invention, by operating the cylinder lock in an emergency, the drive cam is rotated via the operating rod to release the engagement between the rack gear and the speed reduction mechanism. At the same time, the bar member can be retracted into the lock box main body by the operating piece of the drive cam.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing the overall appearance of an electric lock according to one embodiment of the present invention, and FIG. 2 is a plan view showing the overall configuration of the electric lock according to one embodiment of the present invention. Here, the electric lock is driven by rotating the drive motor 10 forward and reverse to reduce the speed of the speed reduction mechanism 1.
The bar member 12 is protruded and retracted via 1.

The electric lock according to the present invention includes a bar member 12 protruding from a lock box main body 13 and retractable, and
A rack gear 14 integrally fixed to a sliding plate 21 supporting the rack gear and driving the bar member 12; a speed reduction mechanism 11 fixedly disposed on a rotating board 15 and engaged with the rack gear 14; A drive motor 10, a drive cam 17 for rotating the rotary board 15 about a support shaft 16, an operating rod 18 for operating the drive cam 17, and an operating rod 18
And a cylinder lock 19 for driving the cylinder lock.

The bar member 12 is a sliding plate 2 having an elongated hole 20.
1 is engaged with the speed reduction mechanism 11 by a rack gear 14 formed on the sliding plate 21. The sliding plate 21 is provided with a pin 2 loosely fitted in the elongated hole 20.
2 slidably supported by the lock box body 13.

The rotating board 15 is supported by the support shaft 16 and the lock box body 13.
And is engaged with a cam groove 17 a formed in the drive cam 17 by a pin 23. Also,
On the rotating board 15, the speed reduction mechanism 11 and the drive motor 10 are mounted. Therefore, the rotation substrate 15 is
6, the drive motor 10 and the speed reduction mechanism 1
1 also rotates integrally. When the reduction mechanism 11 rotates about the support shaft 16, the engagement with the rack gear 14 is released.

The drive cam 17 has a cam groove 17a and an operating piece 1
7b, a drive pin 17c, and a shaft hole 17d, and are supported by the lock box main body 13 by the shaft hole 17d so as to be able to rotate halfway. The drive cam 17 is urged by a spring 29 in a direction opposite to the direction of arrow B. The cam groove 17a engages with the pin 23 of the rotating board 15 and the operating piece 17
“b” is arranged so as to be able to engage with the engaging pin 24 of the sliding plate 21. Further, the drive pin 17c is
a.

The operating rod 18 has engaging holes 18b, 18 at both ends.
square hole 1 which has a driving pin 17c
8a. The square hole 18a is formed with a margin with respect to the diameter of the drive pin 17c. A cylinder cam 19a of a cylinder lock 19 is engaged with an engagement hole 18b of the operating rod 18 by a pin 19b. Therefore,
When the cylinder lock 19 is unlocked, the cylinder cam 19
a rotates to operate the operating rod 18.

The drive motor 10 includes a control unit (CPU) 25
The forward and reverse rotations are controlled by a driver 26 driven by a control signal from the controller 26. Further, the sliding plate 2 is controlled by limit switches 27 and 28 provided in the lock box body 13.
1 is confirmed, and the rotation direction of the drive motor 10 is determined.

Next, a method of using the electric lock configured as described above will be described. First, when locking and unlocking are performed by the drive motor 10, the control unit 25 and the driver 26 are operated by a ten-key (not shown) or the like, and the drive motor is rotated forward and reverse to thereby rotate the bar member 12 via the rack gear 14. Protrude or retract.

Next, regardless of the electric system, the cylinder lock 1
In the case of emergency unlocking by 9, the cylinder lock 19 is rotated by a key in the direction of arrow A (see FIG. 2). When the cylinder rotates, the cylinder cam 19a pushes down the operating rod 18 downward. When the operating rod 18 is pushed down, the square hole 1
The drive cam 17 engaged with the drive pin 17c at 8a
It rotates in the direction of arrow B around 7d (see FIG. 3). When the drive cam 17 rotates in the direction of arrow B about the shaft hole 17d, the operation piece 17b comes into contact with the engagement pin 24 of the slide plate 21. When the driving cam 17 rotates, the rotating substrate 15 engaged with the cam groove 17a by the pin 23 also rotates in the direction of arrow C about the support shaft 16 according to the cam groove 17a.

When the rotation board 15 rotates according to the cam groove 17a, the engagement between the speed reduction mechanism 11 and the rack gear 14 is released, and the rotation mechanism 15 is separated from the rack gear 14. With the engagement between the speed reduction mechanism 11 and the rack gear 14 released, the cylinder lock 19
When the driving cam 17 is further rotated via the operating rod 18 by the operation, the sliding plate 21 is pulled in the direction of arrow D by the operating piece 17b (see FIG. 4). When the sliding plate 21 is retracted, the bar member 12 also retreats into the lock box main body and is unlocked. In this manner, the bar lock member 12 is retracted by the cylinder lock 19 in a state where the engagement between the speed reduction mechanism 11 and the rack gear 14 is released, so that emergency unlocking can be performed smoothly.

When returning from the emergency unlocked state to the normal driving state, as shown in FIG.
Is rotated in the direction of arrow E. Then, the operating rod 18 is raised, and the driving cam 17 is also returned to the original position by the urging force of the spring 29 and the operating rod 18. Drive cam 17
Is returned to the original position, the speed reduction mechanism 11 and the rack gear 1
4 also meshes again. Also, the speed reduction mechanism 11 and the rack gear 1
4 is the cam groove 1 by the drive cam 17 urged by the spring 29.
Since the connection is regulated via the switch 7a, the engagement is not released in a normal driving state. Further, when returning to the normal driving state, the reduction gear mechanism 11 and the rack gear 14 do not mesh well with each other, and even if the peaks are in contact with each other, a square hole is formed with respect to the driving pin 17c. Since 18a is formed with a margin, the cylinder lock 19 can be returned to the key removal / insertion position without any problem. The driving cam 17 is
Since the spring is biased by the spring 29, when the speed reduction mechanism 11 starts rotating, the gear returns to the normal position.

FIG. 10 shows another embodiment of the present invention. Here, the electric lock has a sickle member 30 protruding and retractable from the lock box main body, and a gear formed concentrically with the rotation axis of the sickle member 30 and driving the sickle member 30 to rotate. A speed reduction mechanism 11 and a drive motor 10 fixedly disposed on the rotating board 15 and engaged with the gear 31; a driving cam 17 for rotating the rotating board 15 about the support shaft 16; , An operating rod 18-1 for operating the driving cam 17, and a cylinder lock 19 for driving the operating rod 18-1.

In the above embodiment, when the cylinder lock 19 is rotated in the direction of arrow A at the time of emergency unlocking, the operating rod 18-1 is turned on.
Turns the drive cam 17. When the drive cam 17 rotates, the rotation board 15 rotates about the support shaft 16 and the engagement between the speed reduction mechanism 11 and the gear 31 is released. At the same time, the actuating piece 17b abuts on the pin 32 and rotates the sickle member 30 to retreat the sickle member 30 to mechanically unlock.

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

[0021]

As described in detail above, according to the electric lock according to the present invention, the electric lock in which the bar member is projected and retracted by rotating the drive motor forward and backward can be projected and retracted from the lock box main body. a locking bar disposed in a rack gear which drives the locking bar with is integrally fixed to the sliding plate supporting the該閂member, and the rack gear is fixed arranged on the rotating substrate Normally, the drive motor engaged via the speed reduction mechanism and the rotating substrate are rotated about the support shaft to release the engagement between the rack gear and the speed reduction mechanism.
A driving cam for retreating the bar member, an operating rod for operating the driving cam, and a cylinder lock for driving the operating rod. Normally, the bar member is driven by the driving motor.
The protrusion, the emergency with retracts to release the engagement with the rack gear and the speed reduction mechanism by rotating the drive cam through the cylinder lock and the actuating rod, lock box the locking bar by operating pieces of the drive cam Since it is retracted into the main body, it can be easily mechanically unlocked with a key in an emergency.

Further, since the structure is simple, the entire lock can be made thin. Further, since the drive cam can reliably connect and disconnect the speed reduction mechanism and the rack gear, it is possible to smoothly return from the emergency unlocked state to the normal drive state.

[Brief description of the drawings]

FIG. 1 is a plan view showing the overall appearance of an electric lock according to one embodiment of the present invention.

FIG. 2 is a plan view showing the overall configuration of the electric lock according to one embodiment of the present invention.

FIG. 3 is a plan view showing an operation state of the electric lock according to the embodiment of the present invention.

FIG. 4 is a plan view showing an operation state of the electric lock showing one embodiment of the present invention.

FIG. 5 is a plan view showing an operation state of the electric lock showing one embodiment of the present invention.

FIG. 6 is a plan view showing a drive motor and a speed reduction mechanism used in the electric lock of the present invention.

FIG. 7 is a plan view showing a rack gear and a bar member used in the electric lock of the present invention.

FIG. 8 is a plan view showing a drive cam used in the electric lock of the present invention.

FIG. 9 is a plan view showing an operating rod used in the electric lock of the present invention.

FIG. 10 is a plan view showing another embodiment of the electric lock of the present invention.

[Explanation of symbols]

 Reference Signs List 10 drive motor 11 reduction mechanism 12 bar member 13 lock box body 14 rack gear 15 rotating board 16 support shaft 17 drive cam 17a cam groove 17b operating piece 17d shaft hole 18 operating rod 18a square hole 19 cylinder lock 19a cylinder cam 19b pin 20 Slot 21 Slide plate 22 Pin 23 Pin 24 Engagement pin 25 Control unit 26 Driver 27,28 Limit switch 29 Spring 30 Sickle member 31 Gear 32 Pin

Claims (2)

(57) [Claims] 1. An electric lock for projecting and retracting a bar member by rotating a drive motor forward and reverse, comprising: a bar member protruding from a lock box main body and retractably disposed; and a sliding plate supporting the bar member. a rack gear which drives the locking bar with is integrally fixed, the drive motor the <br/> rack gear and normal engages through a speed reduction mechanism is fixed arranged on the rotating substrate , by rotating the rotating substrate around the supporting shaft
Release the engagement between the rack gear and the reduction mechanism and
Impact and drive cam to retract the serial locking bar, the actuating rod for operating the drive cam, and a lock cylinder for driving the actuating rod, in the normal, the locking bar by the drive motor
Out, the emergency While evacuating, cylinder lock and to release the engagement between the rack gear and the speed reduction mechanism by rotating the drive cam through the operating rod, lock box main body locking bar by operating pieces of the drive cam An electric lock characterized by being retracted inside. 2. The drive cam controls the rotation of the rotary board by means of a cam groove, so that when the drive motor is locked or unlocked, the engagement between the speed reduction mechanism and the rack gear is not disengaged. The electric lock according to claim 1.