JP2799309B2 - Electric 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 electric lock used for doors of various facilities such as lockers, safes, and houses.

[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, there has been a method of mechanically disengaging an electric motor and a reduction gear and forcibly retracting a bar member as disclosed in Japanese Patent Application No. 5-268687.

[0003]

In the above-mentioned conventional emergency unlocking means for an electric lock, for example, the electric motor and the reduction gear can be disengaged and forcibly unlocked. I couldn't do it. This is inconvenient when valuables are stored, and has a drawback of lacking safety.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric lock which can be reliably locked and unlocked by mechanical means even in an emergency, in view of the above-mentioned conventional disadvantages.

[0005]

An electric lock according to the present invention comprises:
An electric lock that projects and retracts a bar member by rotating the drive motor forward and backward, and is integrally fixed to a bar member that is protruded from the lock box body and that is disposed so as to be retractable, and a sliding plate that supports the bar member. A rack gear for driving the bar member and
A speed reduction mechanism and a driving motor fixedly disposed on the rotating board and engaged with the rack gear; a driving cam for rotating the rotating board about a support shaft; and an operating rod for operating the driving cam A locking leaf spring fixed to a part of the operating rod, a locking cam rotatably supported by the lock box main body, and a locking slide that moves in parallel by the locking cam to push out the bar member. A driving cam, the driving rod is driven to rotate the driving cam to release the engagement between the rack gear and the speed reduction mechanism, and the operating piece of the driving cam causes the bar member to be inserted into the lock box main body. The locking sliding cam is driven by the operating arm of the locking cam via a pin erected on the locking cam by a locking plate spring fixed to the operating rod. Locking the bar by projecting the bar member A.

[0006] The locking leaf spring is characterized in that the locking with the pin provided on the locking cam is released when the locking of the bar member is completed. Further, the engagement between the bar member and the locking leaf spring is released by a projection provided upright on the inner surface of the lock box main body.

As described above, according to the electric lock of the present invention, it is possible to securely lock the electric lock even in an emergency such as a power failure.

[0008]

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, FIG. 2 is a plan view showing a drive motor and a speed reduction mechanism used in the electric lock, and FIG. FIG. 4 is a plan view showing a rack gear and a bar member, and FIG. 4 is a plan view showing a drive cam used in the electric lock.
FIG. 2 is a partially cutaway plan view showing an internal configuration of the electric lock.
In this embodiment, the electric lock projects and retracts the bar member 12 through the speed reduction mechanism 11 by rotating the drive motor 10 forward and backward.

The electric lock according to the present invention comprises a bar member 12 protruding from a lock box main body 13 and being retractable.
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 on the support shaft 16 by the lock box body 13.
And is engaged with a cam groove 17a formed in the drive cam 17 by a pin 23 extending to the rear surface. In addition, the speed reduction mechanism 11 and the drive motor 10 are mounted on the rotating board 15. Therefore, when the rotation substrate 15 rotates about the support shaft 16, the drive motor 10
And the speed reduction mechanism 11 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
7b, a drive pin 17c extending on the upper surface, and a shaft hole 17d, and are half-turnably supported by the lock box body 13 by the shaft hole 17d. The drive cam 17 is urged by a spring 29 in the direction of arrow B. The cam groove 17a is engaged with the pin 23 extending from the rotation board 15 and the operating piece 17b is arranged so as to be able to engage with the engaging pin 24 provided on the sliding plate 21. I have. In addition, the drive pin 17
c is loosely fitted in the square hole 18a of the operating rod 18.

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 operating rod 18 has a locking leaf spring 30.
Are fixed with screws 31. The locking leaf spring 30 is warped upward diagonally, and is urged to slide on the inner surface of the cover 32 of the electric lock when the operating rod 18 moves.

A lock cam 33 is rotatably supported by a shaft 34 on the cover 32 of the lock box body 13 as shown in FIG. As shown in FIGS. 8A and 8B, the locking cam 33 has a shaft hole 33a, an engagement protrusion 33b, and an operating arm 33c. The engaging projection 33b of the locking cam 33 rotatably attached to the lock box main body 13 extends downward from the fan-shaped groove 35, and can be engaged with the locking leaf spring 30 described above. Further, protrusions 32 a are formed on the inner surface of the cover 32 on both sides of the fan-shaped groove 35.

On the other hand, a locking sliding cam 38 is supported by the elongated hole 36 and the shaft 37 of the cover 32 so as to be movable in parallel. As shown in FIGS. 9 and 10, the locking sliding cam 38
7 has a long hole 39 loosely fitted therein, a protrusion 40 formed on the upper surface, and a protrusion 41 formed on the lower surface.

The locking cam 33 and the locking sliding cam 38 configured as described above are attached to the cover 32 as shown in FIG. 1, and the right end of the locking sliding cam 38 in the drawing is the bar member 12. , And moves parallel to the direction in which the bar member 12 protrudes.

As shown in FIG. 6, the rotation of the drive motor 10 is controlled by a driver 26 driven by a control signal from a control unit (CPU) 25. Also,
Limit switches 27, 2 arranged in lock box body 13
8, the position of the sliding plate 21 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 or the like, the cylinder lock 19 is rotated by a key in the direction of arrow A (see FIG. 6). When the cylinder rotates, the cylinder cam 19a pushes down the operating rod 18 downward. When the operating rod 18 is pushed down, the driving cam 17 engaged with the driving pin 17c by the square hole 18a rotates around the shaft hole 17d. When the drive cam 17 rotates around the shaft hole 17d, the operation piece 17b comes into contact with the engagement pin 24 of the slide plate 21. When the drive cam 17 rotates,
The rotating board 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 drive 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. 6). When the sliding plate 21 is retracted, the bar member 12 engaged with the sliding plate 21 also retreats into the lock box main body,
It is unlocked. Thus, the speed reduction mechanism 11 and the rack gear 14
In the state where the engagement with is released, the bar member 12 is retracted by the cylinder lock 19, so that emergency unlocking can be performed smoothly.

Next, a case where the door is mechanically locked from the emergency unlocked state will be described. As shown in FIG. 1, a cylinder lock or the like is operated and pulled up from a state where the operating rod 18 is lowered (unlocked state). Then, the distal end 30a of the locking leaf spring 30 sliding on the inner surface of the cover 32 fixed to the operating rod 18 comes into contact with the engaging projection 33b of the locking cam 33,
The locking cam 33 is turned around the shaft 34 in the direction of arrow F.

When the locking cam 33 rotates in the direction of arrow F, the operating arm 33c engages with the projection 40 of the locking sliding cam 38 to move the locking sliding cam 38 in parallel along the elongated hole 36. . When the locking sliding cam 38 moves in parallel, the end 38a of the locking sliding cam 38 pushes out the bar member 12 and locks.

When the operating rod 18 is further raised, the locking leaf spring 30 rides on the projection 32a formed inside the cover 32 and is disengaged from the engagement projection 33b. When the engagement between the engagement projection 33b and the locking leaf spring 30 is released,
The bar member 12 can be protruded or retracted via the rack gear 14 by rotating the drive motor forward or backward.

FIG. 13 is an explanatory view of a principal part showing an operational relationship between the locking cam 33 and the sliding slide cam 38, and FIG. 14 is an explanatory view of a principal part showing an operational relationship between the locking cam 33 and the operating rod 18. It is. During normal operation, the operating rod 18, the locking cam 33,
At this time, the locking sliding cam 38 is at the position P1 and the locking cam 33 is in a free state with respect to the operating rod 18.

Next, by sliding the operating rod 18 to the lower position P1-2, the rack gear 14 separates from the speed reduction mechanism 11 and performs the above-described forced release operation. At this position, the locking leaf spring 30 engages with the engaging projection 33b to prepare for locking. Further, when the operating rod 18 is pushed up, the tip 30a of the locking leaf spring 30 pushes up the engaging projection 33b,
The locking cam 33 is rotated (P2).

Further, when the operating rod 18 is pushed up, it is pushed back by the projection 32a provided on the cover 32 at the position P3, and the engagement between the locking leaf spring 30 and the engagement projection 33b is released. When the operating rod 18 is pushed up to the position P4, the locking cam 33 reaches the rotation limit point, and the locking cam 33 is completely free. Here, the speed reduction mechanism 11
Returns to the original position, and the locking operation ends. in this way,
The electric lock of the present invention can be locked by mechanical means even in an emergency.

The present invention is not limited to the above-described embodiment, and various design changes can be made based on the technical concept of the present invention.

[0029]

As described in detail above, according to the electric lock according to the present invention, in the electric lock in which the bar member is projected and retracted by rotating the drive motor in the normal and reverse directions, it can be projected and retracted from the lock box main body. A bar member provided, a rack gear integrally fixed to a sliding plate supporting the bar member and driving the bar member, and a rack gear fixedly provided on the rotating board and associated with the rack gear. A combined speed reduction mechanism and drive motor, a drive cam for rotating the rotary substrate about a support shaft, an operating rod for operating the drive cam, and a locking leaf spring fixed to a part of the operating rod. A locking cam rotatably supported by the lock box main body, and a locking sliding cam that moves in parallel by the locking cam and pushes out a bar member, and drives the operating rod by driving the operating rod. Rotate the cam to reduce the speed with the rack gear The engagement with the mechanism is released, and the bar is retracted into the lock box body by the operating piece of the drive cam to unlock the lock box. The locking leaf spring fixed to the operating rod stands on the locking cam. By driving the locking sliding cam with the operating arm of the locking cam through the provided pin, the bar member is projected and locked, so that locking can be performed by emergency means.

The locking leaf spring is disengaged from the pin provided on the locking cam at the time when the locking of the bar member is completed, so that the locking spring is mechanically locked and then driven by the drive motor. Can be unlocked electrically. Further, the engagement between the bar member and the locking leaf spring is released by the projection provided on the inner surface of the lock box main body, so that the engagement can be released at the end of the locking operation.

[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 a drive motor and a speed reduction mechanism used in the electric lock.

FIG. 3 is a plan view showing a rack gear and a bar member used in the electric lock.

FIG. 4 is a plan view showing a drive cam used in the electric lock.

FIG. 5 is a partially cutaway plan view showing the internal configuration of the electric lock.

FIG. 6 is a plan view showing a basic configuration of the electric lock.

FIG. 7 is a plan view showing a cover of the electric lock.

FIG. 8A is a plan view of a locking cam used in the electric lock. B is a side view of the locking cam used for the electric lock.

FIG. 9 is a plan view of a locking sliding cam used in the electric lock.

FIG. 10 is a side view of a locking sliding cam used in the electric lock.

FIG. 11 is a plan view of an operating rod used in the electric lock of the present invention.

FIG. 12A is a plan view of a locking leaf spring used in the electric lock of the present invention. B is a side view of the locking leaf spring used in the electric lock of the present invention.

FIG. 13 is an explanatory view of a main part showing an operation state of the electric lock.

FIG. 14 is an explanatory view of a main part showing an operation state of the electric lock.

[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 17c drive pin 17d shaft hole 18 operating rod 18a square hole 19 cylinder lock 19a cylinder cam 19b Pin 20 Long hole 21 Sliding plate 22 Pin 23 Pin 24 Engagement pin 25 Control part 26 Driver 27,28 Limit switch 29 Spring 30 Locking leaf spring 30a Tip 31 Screw 32 Cover 32a Projection 33 Locking cam 33a Shaft hole 33b Engagement projection 33c Operating arm 34 Shaft 35 Fan-shaped groove 36 Slot 37 Shaft 38 Locking sliding cam 38a End 39 Slot 40 Projection 41 Projection

Claims (3)

(57) [Claims] 1. An electric lock for projecting and retracting a bar member by rotating a drive motor forward and backward, wherein a bar member protrudes from a lock box main body and is retractably disposed, and a sliding plate supporting the bar member. A rack gear that is integrally fixed and drives the bar member, a reduction mechanism and a drive motor that is fixedly disposed on the rotating board and engages with the rack gear, and a support shaft that supports the rotating board. A drive cam that rotates as a center,
An operating rod for operating the drive cam, a locking leaf spring fixed to a part of the operating rod, a locking cam rotatably supported by the lock box main body, and a parallel movement by the locking cam. A locking sliding cam for pushing out the bar member, and driving the operating rod to rotate the driving cam to release the engagement between the rack gear and the speed reduction mechanism, and to operate the operating piece of the driving cam. The locking member is retracted into the lock box main body by the locking lever and unlocked, and the locking arm of the locking cam is actuated by a locking plate spring fixed to the operating rod via a pin erected on the locking cam. An electric lock, wherein the locking cam is driven to drive the bar member to protrude for locking. 2. The electric lock according to claim 1, wherein the locking leaf spring is disengaged from a pin erected on the locking cam when the locking of the bar member is completed. . 3. The electric lock according to claim 1, wherein the engagement between the bar member and the locking leaf spring is released by a projection erected on an inner surface of the lock box main body.