JPH0341015Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electric lock using a reversible rotating motor.

(Prior art and its problems) Conventionally, electric locks using reversible rotary motors have been used, such as the remote control motor device described in Japanese Utility Model Publication No. 54-30316 or the one described in Japanese Utility Model Application Publication No. 58-120353. There are electric locks, but in the case of the former, torque is transmitted using a centrifugal clutch, so if this mechanism is applied to a door lock where the dead bolt is moved in and out by the rotation of the hub, the clutch will not move while the motor is rotating. Since the friction surface is always subject to a large frictional force, it not only wears out quickly and cannot withstand long-term use, but also causes damage to the motor when the dead bolt is not aligned with the fitting hole of the bracket when the door is closed. If the lock is driven, the clutch simply slips and the dead bolt does not protrude, which poses the risk of being mistaken for a locked lock, and has the fatal disadvantage of shortening the life of the clutch.

In the latter case, a torque clutch is interposed between the motor drive section and the manual operation section so that electric operation and manual operation can be performed independently. Not only does it require a large amount of force to do this, but as with the former case, if the locking button is pressed and the motor is driven when the dead bolt is not aligned with the fitting hole in the bracket when the door is closed, the clutch may slip. However, the dead bolt will not protrude and will continue to idle unless the door is pushed so that the dead bolt matches the fitting hole in the bracket, which may cause burnout of the motor or damage to the clutch. When a timer is provided to prevent accidents, the locking button must be pressed again after aligning the dead bolt with the fitting hole of the receiver, which is time consuming and inconvenient.

(Purpose of the invention) In order to solve the above-mentioned problems of the prior art, the present invention has developed a system that uses a clutch in which gears engage and disengage to independently operate a motor drive unit and a manual operation unit that move the dead bolt in and out. In addition, when the dead bolt is made to protrude, a rotational force is applied to the hub via a spring, so that even if the dead bolt is in a state where it cannot be ejected, the motor is not driven until the state is released. It is an object of the present invention to provide an electric lock using a reversible rotary motor, which has excellent durability and high safety, and which automatically projects a dead bolt at the same time as the state is released.

(Structure of the invention) The electric lock according to the invention has a shaft 4 in the lock case 1.
A dead bolt 2 which is moved in and out by the rotation of a hub 3 which is pivotally supported at is fitted, and when the hub 3 is rotated in the direction in which the dead bolt 2 projects, it is rotated via a coil spring 6 wound around a shaft 4.
When the hub 3 is rotated in the direction in which the dead bolt 2 moves backward, a gear 5 to be directly rotated is coaxially supported on the shaft 4, and is slid up and down by the rotation of the operating shaft 7, which is rotated by the operation of a cylinder lock or thumb turn. The lower end of the connecting plate 11 is connected to the gear 5 on the shaft 11.
At _{the same} time, a gear 14 is pivotally supported at a shaft 15 via a gear such as a worm gear 13 by the drive of a reversible rotary motor 12, and two gears mesh with a gear 14 ₁ which is integrally fixed to the gear 14. The gears 17 and 18 are pivotally supported by shafts 17 ₁ and 18 ₁ , respectively, and a clutch plate 16 that is pressed against the end face of the gear 14 ₁ by the restoring force of a spring 19 is coaxially supported on the shaft 15, The rotation of the clutch plate 16 causes the gear 17,
18 is configured to selectively mesh with the gear 5, and is swung by the upward and downward movement of the connecting plate 11 to rotate the clutch plate 16 to a position where the gears 17 and 18 do not mesh with the gear 5. The plate 21 is attached to the shaft 4
It is characterized by being coaxially supported.

Note that the relationship between _the hub 3 and the gear ₅ is as shown in FIG. 5 ₁
When the gear 5 is engaged and rotates clockwise, the hub 3 is directly rotated clockwise, and when the gear 5 is rotated counterclockwise, both ends are engaged with the pin 5 ₁ and the protrusion of the hub 3, respectively. The hub 3 rotates counterclockwise via the coil spring 6 that rotates, and when the dead bolt 2 cannot be ejected, that is, when the hub 3 cannot rotate counterclockwise, the coil spring 6 is twisted by the rotation of the gear 5. Power is stored. Further, the release plate 21 is formed with a protruding piece 21 ₁ that fits into a notch 16 ₁ formed in the clutch plate 16, and the bulging portion 11 ₄ of the pivot portion 11 ₂ is formed by moving the connecting plate 11 up and down. Shoulders 21 ₂ , 21 ₃ are formed to be pressed by. In the figure, 8
is a tooth 7 2 on the outer periphery of an operating shaft 7 which is pivotally supported above the lock case 1 and has a 90 degree play hole 7 in the center through which the operating plate A of a cylinder lock or thumb turn (not shown ₎ is inserted. ...7 An intermediary gear meshing with ₂ ,
A spring 10 is suspended between the lock case and the upper end of the connecting plate ₁₁ , which is pivotally supported by a shaft 9 and clicks when rotated by a certain angle. supported. 20
is fixed to the lock case side plate ₁₁ with a pin that prevents the clutch plate 16 from rotating beyond a certain angle. Reference numerals 22 and 23 indicate micro switches for power supply control that detect the rise and fall of the connecting plate 11 and cut off the power to the motor 12, and are claws that are pushed up by pins ₁₁₃ provided at the lower end of the connecting plate 11. The break contact is opened and closed by upward and downward movement of the sliding plate 24 integrally formed with the piece 24 ₁ or the claw piece 24 ₂ which can be pushed down. In addition, micro switches 25 and 26 are provided in parallel on the back side of the micro switches 22 and 23 for confirming the locking and unlocking, and when the hub 3 rotates, _the upper The make contact is opened and closed by a sliding plate 27 that moves downward. 28 is a reed switch for confirming closing of the door attached to the front plate of the lock case, 29 is a control board, and 30 is a lead wire exit hole.

(Function of the invention) In accordance with the above structure of the invention, the specific usage and operation of the electric lock of the invention will be explained with reference to the illustrated embodiment.

First, a case will be described in which a normal door lock is unlocked by operating a cylinder lock on the outside of the door or a thumb turn on the inside of the door.

That is, in the locked state shown in FIG. 1, when the cylinder lock or thumb turn is operated to rotate the operation plate A to the left, i.e., counterclockwise, the operation shaft 7 rotates as a unit and engages the teeth 7 ₂ . . . 7 ₂ . Since the gear 8 rotates clockwise, the connecting plate 11 descends, and the gear 5 connected thereto rotates clockwise. At this time, the gears 17 and 18 of the clutch plate 16, which is the clutch mechanism,
Gear 14 is in a neutral state where it is not meshing with gear 14.
Even if ₁ is in a fixed state, the gear 5 rotates to the right, that is, clockwise, without any problem, and the hub 3 rotates integrally to move the dead bolt 2 backward, that is, to unlock it as shown in FIG. When the operation plate A is rotated clockwise in the unlocked state shown in FIG. It is rotated counterclockwise via the coil spring 6 interposed between the gear 5 and the dead bolt 2 to protrude, and is locked as shown in FIG.

Thereafter, the above operation is repeated every time the cylinder lock or thumb turn is operated.

Next, a case will be described in which the lock is turned and unlocked by energizing the motor.

That is, in the unlocked state shown in FIG. 4, when the locking switch is pressed and the motor 12 is energized to rotate, the gear 1 meshes with the gear 12 ₁ integrated with the rotating shaft.
3 ₁ causes the worm gear 13 to rotate to the left, and the gear 14 meshing with the worm gear 13 and the gear 14 ₁ integral therewith to rotate to the left, that is, counterclockwise. At this time, since the clutch plate 16 is pressed against the end surface of the gear 14 by the restoring force of the spring 19, it rotates together with the gear ₁₄₁ due to the frictional force until the clutch plate 16 reaches the position where the gear 17 meshes with the gear 5. When rotated, the pin 20 restricts further rotation and stops at this position, and the release plate 21 is rotated clockwise as the protrusion 21 ₁ is pushed by the counterclockwise rotation of the clutch plate 16. (Figure 3).

Due to the rotation of the clutch plate 16, the gear 17 that is always meshing with the gear ₁₄₁ meshes with the gear 5, and the gear 17 transmits the rotational force of the gear ₁₄₁ to the gear 5, so that the gear 5 is connected to the gear 14. The hub ₃ rotates counterclockwise via the coil spring 6 to project or lock the dead bolt 2, but due to the rotation of the gear 5, the connecting plate 11 is rotated at the upper end. The release plate 21 rises while swinging to the right around the shaft 11 ₁ as a fulcrum, and in the raised position, the bulge _{11 4 of} the pivot 11 ₂ pushes the upper shoulder 21 2 of the release plate 21 to the left. The clutch plate 16 is rotated counterclockwise, and the clutch plate 16 is rotated clockwise, that is, in the direction in which the gears 17 and 5 are disengaged, resulting in the locked state shown in FIG. At this time, the sliding plate 24 is pushed up by the rise of the connecting plate 11 and pushes the break contact of the micro switch 22 to open the circuit, thereby cutting off the power to the motor 12 and stopping the rotation of the motor.

During the above locking operation, if the dead bolt 2 cannot be ejected due to mismatch with the fitting hole of the holder, the hub 3 is fixed and cannot rotate, but the gear 5 is rotated by the coil spring 6. The coil spring 6 rotates against the restoring force, and as a result of the rotation, a torsional force is stored in the coil spring 6, so that the rotation of the gear 5 causes the connecting plate 11 and the sliding plate 24 to rise, thereby completing the locking operation. Even if the motor 12 is detected and the motor 12 is de-energized and the motor stops rotating, when the dead bolt cannot be ejected, the hub 3 will rotate due to the accumulated torsional force of the coil spring 6. The dead bolt 2 is then protruded and locked (Fig. 1).

Next, in the locked state shown in FIG. 1, when the unlocking switch is pressed and the motor 12 is energized to rotate to the left, the gear 14 rotates to the right, that is, clockwise, contrary to the above, and the clutch plate 16 also rotates as a unit. When the gear 18 rotates to a position where it meshes with the gear 5, further rotation is restricted by the pin 20 and it stops at this position, and the release plate 21 is released by the clockwise rotation of the clutch plate 16, causing the protrusion 21 ₁ is pressed and rotates counterclockwise.

Due to the rotation of the clutch plate 16, the gear 18, which is always meshed with the gear ₁₄₁ , meshes with the gear 5, and the gear 18 transmits the rotational force of the gear ₁₄₁ to the gear 5, so that the gear 5 is connected to the gear 14. ₁ , that is, in the clockwise direction, and the hub 3 is directly pushed and rotated by engagement with the pin 5 ₁ to unlock the dead bolt 2 at its rear end, that is, the hub 3 rotates in the same direction as the gear 5, that is, in the clockwise direction. is lowered while swinging to the right around the upper end shaft 11 ₁ as a fulcrum, and in the lowered position, the bulging part 11 ₄ pushes the lower shoulder 21 ₃ of the release plate 21 to the left, so the release plate 21 moves clockwise. the clutch plate 16 in the counterclockwise direction, that is, gear 18 and gear 5.
Rotate in the direction in which the mesh is released, and the released state shown in FIG. 4 is achieved.

At this time, due to the lowering of the connecting plate 11, the sliding plate 24
is pushed down and pushes the break contact of the micro switch 23 to open the circuit, cutting off the power to the motor 12 and stopping the rotation of the motor.

Thereafter, the above operation is repeated every time the motor is energized.

In this embodiment, a configuration is shown in which the rotational force of the motor is indirectly transmitted to the gear 14 via the worm gear ₁₃ . It is also possible to adopt a configuration in which the gears 14 are meshed with each other and the rotational force of the motor is directly transmitted to the gears 14, or a well-known gear mechanism other than a worm gear, such as a bevel gear, can be arbitrarily adopted as the transmission gear mechanism. Of course you can.

(Effects of the invention) As described above, according to the electric lock according to the invention, in an electric lock using a reversible rotating motor,
Using a clutch that engages and disengages gears, the motor drive unit that moves the dead bolt in and out can be operated independently, and the manual operation unit can be operated independently. In comparison, the structure is simple, there is almost no wear on the clutch part, and an electric lock with excellent durability can be provided at a low price.Furthermore, when the dead bolt is protruded or locked, rotational force is applied to the hub via a spring. Because of this, the dead bolt may not be able to eject due to misalignment with the fitting hole of the receiving fitting, or if there is side pressure on the door and a large frictional force is applied between the dead bolt and the receiving fitting. After the locking operation by the motor is completed, the deadbolt is automatically extended and locked by simply resolving the state in which the deadbolt cannot be ejected, without having to perform the locking operation from the beginning. It is extremely safe in terms of safety as it does not overload or damage the clutch.

[Brief explanation of the drawing]

The drawings illustrate the embodiments of the present invention.
The figure is a side view of the electric lock of the present invention in the locked state.
The figure is a longitudinal sectional view taken along the line A-A in Figure 1, Figure 3 is a side view of the same in the middle of locking by motor drive, Figure 4 is a side view of the same in the unlocked state, and Figure 5 is a side view of the same in the unlocked state.
FIG. 6 is an exploded perspective view showing the relationship between the hub, the gear, and the release plate, and FIG. 7 is an enlarged cross-sectional view of the hub portion. 1...Lock case, 2...Dead bolt, 3...
Hub, 6... Coil spring, 11... Connection plate, 12... Reversible rotary motor, 16... Clutch plate, 17, 18... Gear, 21... Release plate.

Claims (1)

[Scope of utility model registration request] A dead bolt 2 that is moved in and out by the rotation of a hub 3 pivotally supported by a shaft 4 is fitted into a lock case 1, and when the hub 3 is rotated in the direction in which the dead bolt 2 projects, a coil wound around the shaft 4 is inserted. A gear 5 which is rotated via a spring 6 and directly rotates when the hub 3 is rotated in the direction in which the dead bolt 2 retreats is coaxially supported on the shaft 4, and an operating shaft 7 which is rotated by the operation of a cylinder lock or a thumb turn. One end of the connecting plate 11, which slides up and down with the rotation of , is pivotally supported on the gear 5 by a shaft ₁₁₂ ,
A gear 14, which rotates via a gear 13 by the drive of a reversible motor 12, is pivotally supported by a shaft 15, and two gears ₁ mesh with a gear 141 integral with the gear 14.
A clutch plate 16 which pivotally supports the gears 7 and 18 and is pressed against the end face of the gear ₁₄₁ by the restoring force of a spring 19 is coaxially supported on the shaft 15, and rotation of the clutch plate 16 causes the gears 17 and 18 to be is configured to selectively mesh with the gear 5, and the connecting plate 1
The clutch plate 16 is oscillated by the upward and downward movements of the clutch plate 16.
An electric lock characterized in that a release plate 21 is coaxially supported on the shaft 4 to rotate the gears 17 and 18 to a position where they do not mesh with the gear 5.