JPH0640802Y2 - Electric lock - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is provided in a case such as a thumb turn rose, and a turning shaft that is turned by a thumb turn or a cylinder lock is also turnable by electric power. The present invention relates to an electric lock for advancing and retracting a dead bolt or the like of a lock device by an engagement portion provided on a shaft.

[Conventional technology]

As a conventional technology of an electric lock that drives a door locking device, etc.,
There are electric locks A and the like shown in FIGS. 5 and 6.

In the figure, supporting plates 2 and 3 are fixedly mounted inside a cylindrical case 1 provided on the indoor side of the door, and a rotation shaft 4 is rotatably fitted and inserted into the case 1 and the supporting plates 2 and 3. Be done.

A thumb turn 5 is fixed to one end of the rotating shaft 4, and an engaging portion 6 is formed at the other end.

The engaging portion 6 engages with a cam in a lock device (not shown), and when the rotating shaft 4 rotates in the forward or reverse direction, the cam moves the dead bolt forward and backward.

The motor M is fixed in the case 1, the first gear 7 is fixed to the shaft of the motor M, the first gear 7 meshes with the second gear 8, and the third gear 9 coaxial with the second gear 8 is The fifth gear 11 that meshes with the fourth gear 10 and is coaxial with the fourth gear 10 meshes with the sixth gear 12, and the seventh gear 13 that is coaxial with the sixth gear 12 meshes with the eighth gear 14 to form the eighth gear. The gear 14 meshes with the ninth gear 15, and the ninth gear 15
Engages with the fixed gear 16 of the rotary shaft 4, and the rotation of the motor M is decelerated and transmitted to the rotary shaft 4.

The rotary shaft 4 is provided with a notched flat portion 17, and the rotation limit angle of the rotary shaft 4 is detected by a microswitch 18 arranged at a position facing the flat portion 17.

The electric lock configured as described above can not only lock and unlock the locking device through the engaging portion 6 by rotating the rotary shaft 4 by the thumb turn 5 or the cylinder lock, but also operate the switch provided at the remote portion. Then, when the power is turned on, the motor M rotates normally or reversely, and the rotation shaft 4 can be rotated through the above-mentioned many gear trains to lock and unlock the locking device. Therefore, either thumb turn operation or electric power is applied. There is a convenience that can be selected and used as appropriate.

[Problems to be solved by the present invention]

Such a convenient electric lock also has the following problems.

(A) The rotation torque of the motor is expanded through the reduction gear train, the rotation torque of the rotation shaft increases, and if the timing of the switch operation is incorrect, the dead bolt will be caught before the door is closed and the biting will occur. The motor may be burned out.

(B) When the electric operation becomes unsuccessful or impossible due to the inclusion of dust in the reduction gear train, the manual operation by the thumb turn or the cylinder lock becomes difficult or impossible.

(C) If the above-mentioned (a) and (b) occur while the door is locked, the door or frame must be broken and the door must be opened.

The present invention has been made to solve such a problem.

[Means for solving problems]

The gist of the present invention is to provide a clutch mechanism in the electric transmission mechanism of the motor, and to have a structure in which the rotating shaft can rotate with a light load when the clutch is disengaged. A rotary shaft that is rotatably fitted in the case and has a thumb turn fixed to one end, and an engaging portion formed at the other end that engages with a lock device provided in the door; Between the power disk which is slidably and non-rotatably fitted, the power gear which is slidably and rotatably inserted on the above-mentioned rotating shaft, and whose outer peripheral surface is provided with a worm gear, and between the power disk and the power gear. A spring inserted in
A magnet coil fixed in the case and attracting the power disk and the power gear by energization, and arranged inside the case on the axis orthogonal to the rotation axis and fixed to the output shaft. A motor in which a pinion meshes with the worm gear through a reduction gear is provided.

[Action]

With the above configuration, when the electric lock is energized, the magnet coil is excited to attract the power gear, the power gear presses against the power disc against the biasing force, and the motor rotates forward or backward to decelerate. The power gear rotates via the gears.

The power disc, which comes into pressure contact with the power gear, rotates its rotating shaft due to frictional force, and the dead bolt or the like of the lock case advances or retracts due to forward or reverse rotation of the engaging portion.

When the electric lock is not energized, the power gear receives the urging force of the spring and is separated from the power disk.Therefore, when the rotary shaft is rotated by the thumb turn or the key inserted in the cylinder lock, the rotary shaft is powered by the power. It rotates with the power disc without being restricted by the gear.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

1 shows a vertical cross-sectional view of the electric lock B, and FIG. 2 shows a Y-Y cross-sectional view of FIG.

In the figure, a case C of the electric lock B is formed by a thumb turn rose 19 and a cover 20 attached to the indoor surface of the door, and a rotation shaft 21 is rotatably fitted in the case C.

A square shaft portion 21a is provided at one end of the rotary shaft 21, and a thumb turn 22 is fitted to the square shaft portion 21a.

Samturn 22 is a boss 22 that fits loosely in Samturn Rose 19.
has a snap ring 23 in the groove provided around the boss 22a.
Is fitted.

An engaging portion 24 having a cross-shaped cross section is formed at the other end of the rotating shaft 21, and a cam of a lock device (not shown) is engaged with the engaging portion 24 to rotate the engaging portion 24. As a result, the cam allows the dead bolt to appear and disappear in the door.

A stopper plate is provided on the outer peripheral surface of the rotating shaft 21, around which a collar portion 25 is provided inside the engaging portion 24 and which is attached to the outer surface of the cover 20.
The collar portion 25 is sandwiched between the cover 26 and the cover 20 so that the rotation shaft 21 is prevented from moving in the axial direction.

As shown in the perspective view of FIG. 3, the rotary shaft 21 is provided with a flat surface 27 in which the outer peripheral surface is cut from the intermediate portion toward the angular shaft portion 21a.

A power disk 28 having a hole having the same shape as the outer peripheral surface of the rotating shaft 21 and the flat surface 27 is slidably fitted in the rotating shaft 21 in the axial direction.

As shown in FIG. 3, the power disk 28 is composed of an outer non-magnetic material portion 28a and an inner magnetic material portion 28b.

A magnetic coil 29, which is loosely fitted to the rotating shaft 21 and fixed to the cover 20, is provided near one side of the power disc 28.
On the other side of the power disc 28, a magnetic power gear 30 which is slidably and rotatably inserted into the rotary shaft 21 is arranged.

The power gear 30 has an annular groove 31 on the side surface on the power disk 28 side.
Is surrounded by a spring 32 between the annular groove 31 and the power disk 28.
Is inserted.

Therefore, the power gear 30 is pressed by the spring 32 and abuts on the stopper 33 protruding from the inner wall surface of the thumb turn rose 19, and is slightly separated from the power disk 28.

A supporting member 34 is fixed to the inner wall surface of the thumb turn rose 19, and a motor 35 arranged on an axis perpendicular to the rotating shaft 21 is fixed to the supporting member 34.

A pinion 36 is fixed to the shaft of the motor 35, and a worm wheel 39 provided on the outer peripheral surface of the power gear 30 meshes with a worm 38 that is coaxial with a gear 37 that meshes with the pinion 36 to rotate the motor 35. A reduction gear that transmits the

Reference numeral 40 shown in FIG. 2 is a bearing mounted on the thumb turn rose 19, and supports the shafts of the gear 37 and the worm 38.

The motor 35 and the magnet coil 29 are energized simultaneously by an external switch and the energization is interrupted at the same time.

The operation of the electric lock configured as described above is as follows.

(When not energized) The power gear 30 is pressed by the spring 32 and abuts against the stopper 33, so that a slight gap is generated between the power gear 30 and the power disk 28 (see FIG. 4 (a)).

In this state, when the thumb turn 22 or the key of the cylinder lock is turned, the turning shaft 21 and the power disc 28 turn,
The power gear 30 is stationary.

Therefore, the rotating shaft 21 rotates with an extremely light load, and the cam of the locking device that engages with the engaging portion 24 advances and retracts the dead bolt.

(When energized) When the electric lock is energized by an external switch, the magnet coil 29 is excited and the magnetic body 28b of the power gear 30 and the power disk 28 is excited as shown by the dotted line in FIG.
A magnetic circuit is generated through the power gear 30, the power gear 30 presses and contacts the power disk 28 against the spring 32, and the motor M rotates normally or reversely.
30 rotates, the rotary shaft 21 rotates together with the power disk 28 that presses and contacts the power gear 30, and the dead bolt of the lock device advances and retracts.

In the unlikely event that dead bolts are caught, a slip occurs between the power gear 30 and the power disk 28, so that the motor M is not overloaded and the motor M is not burned.

Further, if the reduction gear is clogged with dust or the like to render the motor M inoperable or the motor M fails, the switch may be turned off and the above-described operation (when not energized) may be performed. .

〔effect〕

The electric lock of the present invention has solved the conventional problems as follows, while taking advantage of the fact that it can be operated by either manual operation or switch operation.

(A) Even if the dead bolt is caught, the motor does not burn.

(B) If the motor becomes inoperable due to dust caught in the reduction gear train, or if the motor fails when the door is locked, turn off the power and turn on the thumb-turn. Since the door can be unlocked easily by manually operating the doors, etc., the door can be opened without breaking the door or the frame.

(C) In the case of manual operation, since the rotating shaft rotates independently of the motor and the reduction gear, it can be operated with an extremely small force.

(D) When a magnet coil, a power disk, etc. are provided on the rotating shaft, the case becomes thicker, and the case protrudes much from the door surface, which causes problems in the appearance of the door and the locking / unlocking operation. By disposing the provided motor on the axial center orthogonal to the rotation axis, it is possible to reduce the thickness of the case and solve the above problem.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a vertical sectional view of an electric lock, FIG. 2 is a sectional view taken along line YY of FIG. 1, and FIG. 3 is a perspective view of main components. Fig. 4 is a sectional view of an essential part for explaining the operation, Fig. 5 is a longitudinal sectional view of an electric lock in a conventional example, and Fig. 6 is a XX sectional view of Fig. 5 B ... Electric lock, 19 ... Sumtern Rose, 20 ... Cover, 21 ...
Rotating shaft, 22 ... Thumb turn, 24 ... Engaging portion, 27 ... Plane, 28 ...
Power disk, 28a ... Non-magnetic material, 28b ... Magnetic material, 29 ... Magnet coil, 30 ... Power gear, 32 ... Spring, 35 ... Motor, 36 ... Pinion, 37 ... Gear, 38 ... Worm, 39
… Worm wheel.

Claims (1)

[Scope of utility model registration request] 1. A case attached to an inner surface of a door,
A turning shaft that is rotatably fitted in the case and has a thumb turn fixed at one end, and an engaging portion formed at the other end that engages with a locking device provided in the door, and slides on the rotating shaft. Between the power disk, which is movably and non-rotatably fitted, the power gear, which is slidably and rotatably inserted through the rotary shaft and has a worm gear on the outer peripheral surface, and between the power disk and the power gear. The spring to be inserted is fixed to the case,
A magnet coil for attracting the power disk and the power gear by energization, and a pinion fixed to the output shaft via a reduction gear are arranged inside the case and on the axis orthogonal to the rotation axis. An electric lock comprising a motor that meshes with the worm gear.