JP2007297811A - Electric lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric lock which does not lock or unlock carelessly when power supply to a motor is turned off. <P>SOLUTION: This electric lock comprises a casing 1, an ultrasonic motor 2 assembled in the casing 1 and rotating an output shaft 5, a hooking member 3 to which the rotating force of the output shaft 5 is transmitted, and drive control means 13, 14 for drivingly controlling the ultrasonic motor 2. The casing 1 is installed on either of an opening/closing body such as a door or a case cover and an opened/closed body opened and closed by the opening/closing body. The hooking member 3 is so operated as to lock or unlock according to the rotation of the output shaft 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric lock.

Conventionally, electric locks have been used to electrically lock and unlock doors, sliding doors, rotary doors, windows, etc., but electromagnetic motors are used as drive sources for the electric locks. Is almost. For example, an electromagnetic motor is provided in a key case attached to the door side, a dead bolt or a saddle member is linked to an output shaft of the electromagnetic motor, and the dead bolt or the saddle member protrudes from the key case on the wall side. There is a stop to be caught when
In such an electric lock, the electromagnetic motor is driven and controlled so that the dead bolt and the collar member protrude from the key case and are locked, and the dead bolt and the hook member are retracted to be unlocked.
JP 7-026809 A JP-A-8-303077

  In the conventional electric lock as described above, an electromagnetic motor is used to move the dead bolt and the saddle member. Therefore, the electromagnetic motor is in a free-rotation state in a non-energized state, and an external force is applied to the dead bolt and the saddle member. When it worked, it sometimes moved inadvertently. In particular, in most cases, the electromagnetic motor is kept in a non-energized state after the locking or unlocking operation is completed, so that when an external force is applied in the locked state, the electromagnetic motor is unlocked or the external force is not applied in the unlocked state. There was a problem that it locked when it acted.

  In addition, there is a risk that illegal intruders can easily unlock and unlock the function as a key.

  An object of the present invention is to provide an electric lock that is not locked or unlocked carelessly when the power supply to a motor is cut off.

The first invention is a casing, an ultrasonic motor that is incorporated in the casing and that rotates the output shaft, a latch member that transmits the rotational force of the output shaft, and drive control of the ultrasonic motor. Drive control means, and the casing is provided on either an opening / closing body such as a door or a lid of a case or an object to be opened / closed by the opening / closing body, and the latch member is provided for rotating the output shaft. It is characterized in that it is configured to perform locking or unlocking operation accordingly.
In addition to the doors, sliding doors, and windows, the opening / closing body includes doors for lockers, containers, trunks, etc., and the walls, frames, and container bodies that face these rotating bodies are rotated. Let it be the body.

  The second invention is based on the first invention, and is linked to the output shaft of the ultrasonic motor, and a follower that operates integrally with the latching member, and operably supports the follower. It is characterized in that it is configured to include a supporting means, and the driven body receives an external force acting on the driven body, and the supporting means receives the external force on the output shaft of the ultrasonic motor.

The third invention is based on the second invention. The latch member-side gear is fixed to the latch member, the gear is used as a follower, and the latch member-side gear is rotatably supported. A support shaft provided in parallel with the output shaft of the sonic motor is used as the support means, and a motor side gear meshing with the latch member side gear is fixed to the output shaft of the ultrasonic motor. It is characterized in that the rotational force is transmitted to the retaining member.
The fourth invention is based on the third invention and is characterized in that the latching side gear is constituted by a worm wheel and the motor side gear is constituted by a worm gear.

  The fifth invention is based on the second invention, and the cam member connected to the output shaft of the ultrasonic motor is the driven body, and the driven body converts the rotational motion of the output shaft into linear motion. In addition, the guide rail for guiding the linear motion of the follower is fixed to the casing, and the cam member is configured to transmit the rotational force of the ultrasonic motor to the latch member.

  6th invention presupposes 2nd invention, the rotary body provided in the outer periphery of the casing which fixed the ultrasonic motor via the bearing is made into the said driven body, This driven body and the output shaft of the said ultrasonic motor are used. It is characterized in that a connecting member to be connected is provided, and the rotational force of the ultrasonic motor is transmitted to the latch member by this connecting member.

  The seventh invention is based on the second invention, and a rotating body provided via a bearing on the outer periphery of the casing to which the ultrasonic motor is fixed is used as the driven body, and a cover fixed to the driven body is provided. A shaft portion is provided at the center of rotation, the shaft portion is connected to the output shaft of the ultrasonic motor, and the rotational force of the ultrasonic motor is transmitted to the latch member by the cover.

  According to the first to seventh inventions, the output shaft of the ultrasonic motor that drives the latch member does not rotate freely when the motor is de-energized, and the rotation is locked. By turning off the power, the locked state and the unlocked state can be maintained. Further, the latch member linked to the output shaft of the motor cannot be easily moved. Therefore, it becomes difficult to perform locking and unlocking carelessly or illegally.

  According to the second to seventh inventions, for example, when an external force is applied to the latching member in an attempt to forcibly open an opening / closing body such as a door in a locked state, the support member receives the external force. The external force can be prevented from acting on the output shaft of the motor. Therefore, even if the door at the time of locking may be forcibly opened, the motor output shaft can be prevented from being damaged.

1st Embodiment of this invention is described using FIGS. 1-3, This 1st Embodiment presupposes a sliding door.
The electric lock shown in FIGS. 1 to 3 incorporates an ultrasonic motor 2 and a hook-shaped latch member 3 that is rotationally driven by the ultrasonic motor 2 in a casing 1, and the pivot member 3 rotates. It is an electric lock that performs locking and unlocking by. The casing 1 is provided with a lid member 4 having an opening 4a through which the latching member 3 can be put in and out, and the collar part 3c of the latching member 3 projects from the opening 4a, or the collar part 3c is an opening 4a. Can be retracted into the casing 1.
FIG. 1 shows the inside of the casing 1. FIG. 2 is a view of the inside of the casing 1 of FIG. 1 as viewed from above, but shows only a coupling mechanism between the latching member 3 and the ultrasonic motor 2, and other configurations are omitted.

  The ultrasonic motor 2 used in the electric lock of the first embodiment uses the electrostriction phenomenon of a piezoelectric element. The principle will be briefly described with reference to the schematic diagram of FIG. As shown in FIG. 3, the ultrasonic motor 2 includes a rotor 6 fixed to the output shaft 5 and a stator 9 composed of a piezoelectric ceramic 7 and an elastic body 8, and applies pressure to the surface of the rotor 6. The stator 9 is in close contact. The stator 9 is fixed to a housing (not shown).

  The piezoelectric ceramic 7 has a property of being distorted according to an applied voltage when a voltage is applied. Therefore, when a high frequency voltage is applied to the piezoelectric ceramic 7, the piezoelectric ceramic expands and contracts to generate ultrasonic vibrations. This ultrasonic vibration is a traveling wave that is deflected by the elastic body 8 and travels in one direction like a swell. This traveling wave is shown as an enlarged curve w in FIG. Since the surface of the rotor 6 is in pressure contact with the apex of each wave forming the traveling wave, the rotor 6 is pushed against the apex of the wave so as to be opposite to the traveling direction of the traveling wave. Move to. For example, when the traveling wave of the stator 9 travels in the arrow A direction, the rotor 6 rotates in the arrow B direction. The output shaft 5 provided on the rotor 6 also rotates in the arrow B direction.

The direction of the traveling wave generated in the stator 9 can be controlled in accordance with how to apply the voltage. Therefore, the rotation direction of the output shaft 5 can be controlled in accordance with the voltage direction.
The above is the driving principle of the ultrasonic motor. In FIG. 3, the deflection of the surface of the stator 9 is schematically illustrated largely, but the traveling wave due to the actual ultrasonic vibration is not at a level where it can be visually observed.

The gear 10 is fixed to the output shaft 5 of the ultrasonic motor 2 as described above. However, when the output shaft 5 is rotated by driving the ultrasonic motor 2, the output shaft 5 is integrated. The gear 10 also rotates. The casing 1 is rotatably provided with a support shaft 12 parallel to the output shaft 5, and the base end of the latch member 3 is fixed to the support shaft 12, while the support shaft 12 has a gear 11. It is fixed. The gear 11 is meshed with a gear 10 fixed to the output shaft 5 of the ultrasonic motor 2. Therefore, when the ultrasonic motor 2 is driven and the gear 10 is rotated, the gear 11 is also rotated accordingly. When the gear 11 rotates in this way, the support shaft 12 rotates and the latch member 3 fixed to the support shaft 12 also rotates.
That is, in the first embodiment, the gear 11 is the latching member side gear of the present invention and constitutes the driven body of the present invention, and the gear 10 is the motor side gear of the present invention. The support shaft 12 is a support means for supporting the driven body of the present invention.

Further, in the casing 1, a driver 13 for driving the ultrasonic motor 2, a control unit 14, a power source 15, stoppers 16 and 17 for restricting the movement range of the latch member 3, and a position for detecting the position thereof Limit switches 18 and 19 are provided. The limit switch 18 is a limit switch that is turned on by the convex portion 3a when the latching member 3 comes into contact with the stopper 16, and detects the locking state. The limit switch 19 is a limit switch that is turned on by the convex portion 3b when the latch member 3 hits the stopper 17, and detects the unlocked state. These limit switches 18 and 19 are connected to the control unit 14.
However, the driver 13, the control unit 14, the power supply 15, and the like may be provided outside the casing 1 and connected to the ultrasonic motor 2 in the casing 1 by wiring. The driver 13 and the control unit 14 constitute the ultrasonic motor drive control means of the present invention.

  As an example of attaching the electric lock as described above, in the first embodiment, the casing 1 is embedded in the sliding door provided in the frame 20 of the building, and the lid member 4 of the casing 1 is fixed to the frame of the sliding door. Assume that you want to. Moreover, the door frame 20 fixed to the building side is formed with a recess 21 into which the latch member 3 is inserted. A plate member 22 is provided on the opening side of the recess 21, and the hook portion 3 c of the latch member 3 is hooked on the stopper portion 22 a of the plate member 22.

In the electric lock of the first embodiment thus configured, the latching member 3 is rotated by the ultrasonic motor 2, and the hook portion 3c of the latching member 3 protruding from the casing 1 is hooked on the stopper 22a. The hook 3c of the latching member 3 is unlocked by being detached from the stopper 22a and retracting into the casing 1.
Since the rotation direction of the latch member 3 changes according to the rotation direction of the ultrasonic motor 2, the control unit 14 can perform the locking or unlocking operation by controlling the rotation direction of the motor 2. it can.

Next, the operation of the electric lock of the first embodiment will be described.
When unlocked from the locked state shown in FIG. 1, the operation is as follows. First, when an unlock signal is input to the control unit 14, the control unit 14 applies a voltage in the unlocking direction to the ultrasonic motor 2 via the driver 13. When the voltage in the unlocking direction is applied to the ultrasonic motor 2 in this way, the ultrasonic motor 2 rotates in the arrow B direction. When the ultrasonic motor 2 rotates in the arrow B direction, the output shaft 5 and the gear 10 are rotated in the arrow B direction accordingly. When the gear 10 rotates in the direction of arrow B, the gear 11 engaged with the gear 10 rotates in the direction of arrow A in the reverse direction, and the latch member 3 that rotates integrally with the gear 11 rotates in the direction of arrow A and is unlocked. The The position of the latch member 3 in the unlocked state is indicated by a two-dot chain line in FIG.

When the latching member 3 moves to the position of the two-dot chain line, the convex portion 3b formed on the latching member 3 turns on the limit switch 19, so that the control unit 14 stops the collar 3c of the latching member 3. It detects that it has completely retracted from the part 22a and has entered an unlocked state, and energization of the ultrasonic motor 2 is stopped.
When the energization of the ultrasonic motor 2 is stopped, the ultrasonic vibration of the stator 9 shown in FIG. 3 is stopped, so that the rotation of the rotor 6 is stopped and the rotation of the output shaft 5 is stopped. In the ultrasonic motor 2, the rotor 6 and the stator 9 are originally in close contact with each other. Therefore, when the energization is stopped and no traveling wave is generated in the stator 9, the stator 9 fixed to the housing or the like is The rotor 6 is held and the brake function is exhibited (see FIG. 3). Therefore, the state at that time, that is, the unlocked state is maintained in a state where the power supply to the ultrasonic motor 2 is turned off.

When locking from the unlocked state, the control unit 14 controls the ultrasonic motor 2 via the driver 13 to rotate the output shaft 5 in the direction of arrow A. Then, the gear 10 rotates in the direction of arrow A, and the gear 11 and the latch member 3 rotate in the direction of arrow B. The latch member 3 moves to the position indicated by the solid line, and is locked.
In the illustrated locked state, the convex portion 3 a of the latching member 3 turns on the limit switch 18, and accordingly, the control unit 14 turns off the ultrasonic motor 2.
As described above, when the power supply to the ultrasonic motor 2 is turned off, the rotor 6 of the ultrasonic motor 2 is held by the stator 9 as in the unlocked state. Therefore, the locked state is maintained.

As described above, since the ultrasonic motor 2 is used to drive the latch member 3, the locked state and the unlocked state can be maintained even when the motor 2 is de-energized.
Further, since the output shaft 5 of the ultrasonic motor 2 is prevented from rotating in the non-energized state, even if an external force in the direction of the arrow A or B is applied to the latch member 3, the force is applied to the gear 11 and the gear 11. It is transmitted to the output shaft 5 through 10 and the output shaft 5 cannot be rotated. That is, even when an external force is applied, the latch member 3 does not easily move like an electric lock using a conventional electromagnetic motor.

When the electric lock is used for a sliding door, when a force is applied in the direction of opening the door in the locked state, a force F indicated by an arrow in FIG. 1 is applied to the latching member 3 that is hooked on the stopper 22a. It acts on the latch member 3. The force F is a force orthogonal to the axis of the support shaft 12 fixed to the base end of the latch member 3, and all of the force F acts on the support shaft 12. Moreover, the force F is a force in a direction in which the support shaft 12 is pulled away from the output shaft 5 of the motor, and this force F does not act on the output shaft 5 of the motor.
That is, the force F acting on the support shaft 12 which is the support means of the present invention does not reach the output shaft 5. Therefore, the force F does not damage the output shaft 5 of the ultrasonic motor 2.

  FIG. 4 shows a second embodiment of the present invention. In the second embodiment, a worm wheel 23 is used as a follower of the present invention instead of the gear 11 of the first embodiment. A worm gear 24 that meshes with the output shaft 5 of the ultrasonic motor 2 is fixed to the worm gear 24. Other configurations are the same as those in the first embodiment. Therefore, the same reference numerals as those in FIGS. 1 to 3 are used for the same components as those in the first embodiment, and detailed descriptions thereof are omitted. However, in FIG. 4, in order to make the worm gear 24 easy to see, the limit switch 18 positioned on the front side of the sheet with respect to the worm gear 24 is indicated by a two-dot chain line.

In the electric lock of the second embodiment, the rotational force of the ultrasonic motor 2 is transmitted from the worm gear 24 to the worm wheel 23, and the latch member 3 is rotated in the direction of arrow A or B to unlock or lock. To do.
In the second embodiment as well, the stator 9 shown in FIG. 3 holds the rotor 6 and prevents its rotation in a state where the ultrasonic motor 2 is turned off, so that the locked state or the unlocked state is ensured. Can be held in.
Further, when a force F in the direction of pulling the latch member 3 is applied, the force F is received by the support shaft 12 of the worm wheel 23 and the force F does not directly act on the output shaft 5 of the motor. Therefore, the output shaft 5 is not damaged by the action of the force F.

The third embodiment shown in FIGS. 5 and 6 is an electric lock in which the latch member 26 provided in the casing 25 is reciprocated in the direction of the arrow Y by the ultrasonic motor 2.
In FIG. 5, the same reference numerals as those in FIG. 1 are used for the same constituent elements as those in the first embodiment. FIG. 6 is a view of the inside of the casing 25 as viewed from above in FIG. 5, and shows only the portion related to the cooperation between the ultrasonic motor 2 and the latch member 26.

  The casing 25 is provided on the sliding door side, the stop hole member 30 is provided on the building-side frame 20, and the sliding door incorporating the casing 25 is in contact with the building-side frame 20, that is, the door is closed. The flange portion 26 a of the latch member 26 is in a relationship facing the stop hole 30 a formed in the stop hole member 30. And when the collar part 26a of the said latching member 26 is hooked in the retaining hole 30a inserted in the casing 25, it will be in a locked state, and when the collar part 26a escapes from the retaining hole 30a, it will be in an unlocked state. That is, although the electric lock of the third embodiment will be described in detail later, the latch member 26 does not protrude from the casing 25, and is locked and unlocked by sliding in the linear direction within the casing 25. It is configured to perform.

  In the electric lock of the third embodiment, as shown in FIG. 6, a support plate member 27 formed by bending a plate member is fixed to the casing 25. The ultrasonic motor 2 is attached to the back surface of the support plate member 27, and the output shaft 5 protrudes from the surface of the support plate member 27. A plate-like cam arm 28 is fixed to the projecting end of the output shaft 5 projecting from the surface of the support plate member 27, and the support plate member 27 is located near the end of the cam arm 28 opposite to the output shaft 5. A shaft portion 28a protruding toward the side is provided.

On the other hand, a plate cam 29, which is a follower of the present invention, is fixed to the latch member 26. The plate cam 29 has a long end at the end opposite to the latch member 26 as shown in FIG. A hole 29a is formed, and the shaft portion 28a of the cam arm 28 is fitted into the elongated hole 29a to couple them together.
Further, as shown in FIG. 6, a slide member 31 is fixed to the back surface of the plate cam 29, and the guide plate 32 is fixed to the support plate member 27 at a position facing the slide member 31. Yes. A guide rail 32 is fitted into the slide member 31 so that the slide member 31 is movable along the guide rail 32 in the Y direction shown in FIG.

  Accordingly, when the output shaft 5 of the ultrasonic motor 2 rotates, the rotational motion is transmitted to the plate cam 29 via the cam arm 28, and the plate cam 29 performs a linear motion in the Y direction along the guide rail 32. . With the linear movement of the plate cam 29, the latching member 26 also linearly moves up and down in FIG. 5 to perform locking and unlocking. The cam arm 28 and the plate cam 29 constitute a cam member of the present invention, and the guide rail 32 and the slide member 31 correspond to support means for movably supporting the plate cam 29 which is a follower of the present invention. .

  Further, stoppers 27a and 27b formed by bending the support plate member 27 are formed at the upper and lower end portions of the support plate member 27, and the step portions 29b and 29c of the plate cam 29 abut against the stoppers 27a and 27b. The stroke is regulated. At the stroke end of the plate cam 29 in the locking direction, the convex portion 29d formed on the plate cam 29 turns on the limit switch 18, and at the stroke end in the unlocking direction, the convex portion 29e formed on the plate cam 29 is The limit switch 19 is turned on. Therefore, the control unit 14 can detect the locked state and the unlocked state by the limit switches 18 and 19, and can control the ultrasonic motor 2 based on the detected limit switch.

Also in the third embodiment, the stator 9 of the ultrasonic motor 2 holds the rotor 6 in a state where the energization of the ultrasonic motor 2 used for driving the latching member 26 is cut off (see FIG. 3). Therefore, the position of the latching member 26 can be held in a non-energized state of the motor, and the latching member 26 is not easily moved by an external force.
Further, even when a force F in the direction of pulling the sliding door is applied in the locked state, the force F is received by the guide rail 32 and the slide member 31 which are support means of the follower, so that the output shaft of the ultrasonic motor 2 The force F acts on 5 and the output shaft 5 is not damaged.

  Furthermore, the electric lock according to the third embodiment is configured so that the locking hole 30a into which the latching member 26 is inserted is locked and unlocked in a state of being inserted into the casing. Even if locking or unlocking is performed, it is difficult to apply a force directly to the latching member 26, and the security is improved accordingly.

The fourth embodiment shown in FIGS. 7 and 8 is an electric lock that rotates a hook-shaped latching member 34 with an ultrasonic motor 2 incorporated in a cylindrical casing 33. 7 is a front view, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG.
In the electric lock of the fourth embodiment, the casing 33 is provided in a door that moves in the direction of arrow U in FIG. As shown in FIG. 8, the casing 33 includes a casing main body 33a and a lid portion 33b that covers the casing main body 33a. The sonic motor 2 is incorporated, and its output shaft 5 is projected outward from the lid portion 33b in a rotatable state. A driver 13 is connected to the ultrasonic motor 2 provided in the casing 33 as described above, and a controller and a power source (not shown) are connected to the driver 13.

A ring-shaped rotating body 36 is attached to the outer periphery of the casing body 33 a via a bearing 35, and the rotating body 36 is rotatably supported with respect to the casing 33.
Further, the latching member 34 protruding outward in the diameter direction is fixed to the outer periphery of the rotating body 36, and the latching member 34 rotates integrally with the rotating body 36. Further, one end of a plate cam 37 having a long hole 37a is fixed to the side surface of the rotating body 36 on the side facing the latch member 34.
The rotating body 36 is a driven body of the present invention, and the bearing 35 is a support means for supporting the driven body.

On the other hand, a cam arm 39 is fixed to the output shaft 5 of the ultrasonic motor 2 via a connecting member 38. The cam arm 39 includes a shaft portion 39 a on the outer side in the diameter direction. The shaft portion 39 a is fitted into the long hole 37 a of the plate cam 37 to connect the cam arm 39 and the plate cam 37. As a result, the output shaft 5 of the ultrasonic motor 2 and the rotating body 36 are connected. That is, the cam arm 39 and the plate cam 37 constitute a connecting member of the present invention.
The reason why the long hole 37a is used to fit the shaft portion 39a of the cam arm 39 is to allow the displacement of the position of the long hole 37a and the shaft portion 39a to be absorbed. However, if the position of the hole into which the shaft portion 39a is fitted can be accurately determined, the hole does not need to be a long hole. Further, the cam arm 39 and the plate cam 37 can be configured as a single member to be a connecting member.

  As described above, since the output shaft 5 of the ultrasonic motor 2 and the rotating body 36 are connected, when the ultrasonic motor 2 is driven and controlled, the rotational force is transmitted via the cam arm 39 and the plate cam 37 to the rotating body 36. Is transmitted to. As a result, the latch member 34 is rotated together with the rotating body 36, and can be locked and unlocked.

  In addition, the latching member 34 shown by the continuous line in FIG. 7 has shown the locking position, and the latching member 34 shown by the dashed-two dotted line has shown the unlocking position. Reference numeral 40 in the figure denotes a convex portion provided on the rotating body 36, which moves together with the rotating body 36 and the latching member 34, turns on the limit switch 18 in the illustrated locked state, and holds the latching member. The limit switch 19 is turned on when 34 is in the unlocked state moved to the position of the two-dot chain line.

Also in the electric lock of the fourth embodiment, when the ultrasonic motor 2 is turned off, the stator 9 shown in FIG. 3 is in close contact with the rotor 6 to prevent the rotation of the rotor 6. . Therefore, if the motor 2 is de-energized, the state at that time can be maintained, and the locked state and the unlocked state can be maintained.
When the force F indicated by the arrow is applied to the latching member 34 at the time of locking, the force F is applied to the output shaft 5 of the motor because the force F is received by the bearing 35, so that the ultrasonic motor The output shaft 5 of 2 is not damaged.
Furthermore, if the cover 41 shown by the two-dot chain line in FIG. 8 is attached to the rotating body 36, all electrical components are housed in the casing 33 and the cover 41. Can be provided.

  The fifth embodiment shown in FIGS. 9 and 10 is different from the fourth embodiment in that the output shaft 5 and the rotating body 36 are connected by the plate cam 37 and the cam arm 39, whereas the cover shown in FIG. The point which has connected both by 42 differs from 4th Embodiment. The other configuration is the same as that of the fourth embodiment, and is an electric lock that rotates the hook-shaped latching member 34 by the ultrasonic motor 2 incorporated in the cylindrical casing 33. FIG. 9 is a front view, and FIG. 10 is a cross-sectional view taken along line XX of FIG. 9. In these drawings, the same reference numerals are used for the same components as those in the fourth embodiment. In the following, a description will be given focusing on the configuration different from the fourth embodiment. However, FIG. 9 shows a state in which the cover 42 is removed.

In the electric lock of the fifth embodiment, a cylindrical cover 42 with one bottom surface closed is fixed to a ring-shaped rotating body 36 attached to the outer periphery of a casing 33 via a bearing 35, and the cover 42 is a rotating body. 36 to rotate integrally. Further, a shaft part 42 a is projected from the bottom surface inside the cover 42. The shaft portion 42 a and the output shaft 5 of the ultrasonic motor 2 are coaxially arranged and connected by a connecting member 43.
Thereby, the rotating shaft 5 of the ultrasonic motor 2 fixed to the casing 33 is connected to the rotating body 36 via the cover 42.
Therefore, by the rotation of the ultrasonic motor 2, the latch member 34 can be rotated together with the rotating body 36, which is the follower of the present invention, and can be locked and unlocked.

  Also in the electric lock of the fifth embodiment, when the ultrasonic motor 2 is in a non-energized state, the stator 9 shown in FIG. 3 is in close contact with the rotor 6 to prevent the rotation of the rotor 6. . Therefore, if the power supply to the motor 2 is turned off, the state at that time can be maintained, and the locked state and the unlocked state can be maintained.

Further, when the radial force F of the casing 33 acts on the latching member 34 at the time of locking, the force is applied to the output shaft 5 of the motor because the force is received by the bearing 35, and the ultrasonic motor 2. Will not be damaged.
Further, the point that the cover 42 can be provided with a drip-proof and dust-proof function is the same as the fourth embodiment.

  In addition, although the said 1st-5th embodiment demonstrated the example which provided the casing in the sliding door which is the opening / closing body of this invention, as an opening / closing body, it is not restricted to a sliding door. Further, the casing may be provided not on the opening / closing body but on the side of the body to be opened / closed by the opening / closing body, such as a door frame.

It is a front view of the state which removed the casing surface of a 1st embodiment. It is a top view of the state which removed the casing upper surface of 1st Embodiment. It is a schematic diagram for demonstrating the principle of operation of an ultrasonic motor. It is a front view of the state which removed the casing surface of a 2nd embodiment. It is a front view of the state which removed the casing surface of a 3rd embodiment. It is a top view of the state which removed the casing upper surface of 3rd Embodiment. It is a front view of 4th Embodiment. It is the VIII-VIII sectional view taken on the line of FIG. It is a front view of the state which removed the cover of 5th Embodiment. FIG. 10 is a sectional view taken along line XX in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Ultrasonic motor 3 Latching member 3c Eave part 5 Output shaft 10 Gear 11 Gear 12 Support shaft 13 Driver 14 Control part 20 Frame 23 Worm wheel 24 Worm gear 25 Casing 26 Latching member 26a Eave part 28 Cam arm 28a Shaft part 29 Plate cam 29a Long hole 31 Slide member 32 Guide rail 33 Casing 33a Casing body 33b Lid 34 Latching member 35 Bearing 36 Rotating body 37 Plate cam 37a Long hole 39 Cam arm 39a Shaft 42 Cover 42a Shaft 43 Connecting member

Claims (7)

  A casing, an ultrasonic motor that is incorporated in the casing and that rotates the output shaft, a latch member that transmits the rotational force of the output shaft, and a drive control unit that drives and controls the ultrasonic motor. And the casing is provided on one of an opening / closing body such as a door or a lid of a case or an opening / closing body opened / closed by the opening / closing body, and the latch member is locked or unlocked according to the rotation of the output shaft. An electric lock configured to work.   A follower that is linked to the output shaft of the ultrasonic motor and that operates integrally with the latching member, and a support means that operably supports the follower, the follower acting on the follower The electric lock according to claim 1, wherein the external force is received by the support means, and the external force does not act on the output shaft of the ultrasonic motor.   The latch member-side gear is fixed to the latch member, the gear is used as a follower, the latch member-side gear is rotatably supported, and a support shaft provided in parallel with the output shaft of the ultrasonic motor is provided as described above. The motor-side gear meshing with the latching member-side gear is fixed to the output shaft of the ultrasonic motor as support means, and the rotational force of the ultrasonic motor is transmitted to the latching member by the two gears. 2. The electric lock according to 2.   The electric lock according to claim 3, wherein the latching side gear is constituted by a worm wheel, and the motor side gear is constituted by a worm gear.   A cam member connected to the output shaft of the ultrasonic motor is used as the follower, and the follower is configured to convert the rotational motion of the output shaft into a linear motion, and a guide rail for guiding the linear motion of the follower is provided. The electric lock according to claim 2, wherein the electric lock is fixed to the casing and transmits the rotational force of the ultrasonic motor to the latch member by the cam member.   A rotating body provided on the outer periphery of a casing to which an ultrasonic motor is fixed via a bearing is used as the follower, and a connecting member for connecting the follower and the output shaft of the ultrasonic motor is provided. The electric lock according to claim 2, wherein the rotational force is transmitted to the latch member.   The rotating body provided on the outer periphery of the casing to which the ultrasonic motor is fixed via a bearing is used as the driven body, and a cover fixed to the driven body is provided. A shaft portion is provided at the center of rotation of the cover. The electric lock according to claim 2, wherein the electric shaft is connected to an output shaft of a sonic motor, and the rotational force of the ultrasonic motor is transmitted to the latch member by the cover.

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