JP2008237331A - Electric opening/closing device of opening/closing body on toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric opening/closing device of an opening/closing body on a toilet, which is capable of reducing a load to a component for actuating the opening/closing body by smoothly opening the opening/closing body such as a toilet seat or a toilet lid on a toilet bowl despite of the state of backlash. <P>SOLUTION: This electric opening/closing device has: a motor M being a drive source; a transmission mechanism 8 for transmitting a torque output by the motor M to the opening/closing body 2 on the toilet bowl 1; a hole IC 9 being detecting means for detecting the rotating speed of the motor M, in particular a motor rotary shaft 5; and control means 10 being means for controlling the torque of the motor M based on the detection by the hole IC 9, when opening the closed opening/closing body 2, at first controlling the motor M to output a first torque which is smaller than a torque necessary for moving the opening/closing body 2 and larger than a torque necessary for filling the backlash of a torque transmission route between the motor and the opening/closing body 2 and, when the hole IC 9 detects at least the lowering of the motor rotating speed, output a second torque which is larger than the necessary torque for moving the opening/closing body 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric opening / closing device for an opening / closing member on a toilet, and more particularly to an electric opening / closing device for a toilet seat and / or a toilet lid.

  In Patent Document 1, a multistage reduction gear train is connected between the motor output shaft and the toilet seat and the toilet lid hinge portion, and the torque output by the motor is reduced by the multistage reduction gear train and transmitted to the hinge portion. In the apparatus for electrically opening and closing the toilet seat and the toilet lid, when the toilet seat and the toilet lid are driven to open and close, an apparatus for determining the position where the toilet seat and the toilet lid are in contact with the toilet bowl (fully closed position) as an origin is proposed. Yes.

  In Patent Document 2, in the same device as Patent Document 1, the angular acceleration at the moment when the toilet seat or toilet lid starts to be opened is reduced by suppressing the drive torque generated at the moment when the motor starts to move. Therefore, when driving the toilet seat or toilet lid in the opening direction in order to reduce the stress on the driving parts such as the reduction gear train, the motor can generate the maximum driving torque that can be generated from the start of the opening operation until a predetermined time. There has been proposed a device that generates a lower driving torque and then gradually increases the driving torque.

JP-A-10-57276 JP 2006-101933 A

  However, there is play between the parts that transmit torque between the output shaft of the motor and the hinges of the toilet seat and toilet lid, particularly between the reduction gear trains. Therefore, even if the position (full closed position) where the toilet seat and the toilet lid are in contact with the toilet bowl is determined as the origin as in Patent Document 1, the moment when the toilet seat or the toilet lid at the origin starts to move and the motor shaft rotates. It doesn't coincide with the starting moment. Therefore, there is a difference between the origin on the opening / closing operation of the toilet seat or the toilet lid and the origin on the motor control, and as a result, the opening operation or the closing operation of the toilet seat or the toilet lid varies.

  Further, as in the device of Patent Document 2, when the toilet seat or the toilet lid is opened, even if the driving torque is generated in the motor according to a predetermined sequence regardless of the size of the backlash, Patent Document 1 There is a problem similar to the device.

  In other words, in a device with backlash between individual parts of the reduction gear train, when the motor shaft is rotated so much that the toilet shaft or toilet lid starts to move from the beginning, the motor shaft runs idle by the backlash. There is a possibility that a motor shaft, a gear shaft or a hinge shaft such as a toilet seat collides with other parts at a high speed (immediately after only the motor shaft is rotated), and damage or wear thereof occurs.

  Further, when the backlash increases due to long-term use, a lot of motor ON period is spent idle, and there is a possibility that the important toilet seat or toilet lid may not be fully opened or completely closed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a toilet that can smoothly open an opening / closing body such as a toilet seat or a toilet lid on a toilet regardless of a loose state, and can reduce a load on components for driving the opening / closing body. It is to provide an electric opening / closing device for the upper opening / closing body.

  In a first aspect, the present invention provides a motor as a drive source, a transmission mechanism that transmits torque output from the motor to an opening / closing body on a toilet, a detection unit that detects a rotation speed of the motor, and the detection Means for controlling the torque of the motor on the basis of the detection by the means, and when opening the closed opening / closing body, is initially smaller than the torque required to move the opening / closing body to the motor and the When a first torque larger than the torque required to close the backlash between the motor and the torque transmission path of the opening / closing body is output, and then the detecting means detects at least a decrease in the rotational speed, the opening / closing body is There is provided an electric opening / closing device for an opening / closing body on a toilet, characterized by comprising: a control means for outputting a second torque larger than a torque necessary for moving.

  According to the present invention, when opening the opening / closing body on the toilet, first, the torque output from the motor is reduced so as not to move the opening / closing body, and only the backlash is filled, and at least the rotation speed of the motor is reduced. After detecting the stop of rotation and confirming that the play is clogged, the torque output by the motor is increased so that the opening / closing body main body moves only for the first time.

  As described above, according to the present invention, it is possible to detect the size of the play existing between the motor and the opening / closing body on the toilet bowl from the rotation speed of the motor, and before the backlash is blocked according to the size of the play. And later, a motor torque of an appropriate magnitude can be generated. In other words, the operation origin of the opening / closing body itself on the toilet and the origin of motor control can always be matched. As a result, the opening / closing body on the toilet can be automatically opened / closed with the same feeling every time, regardless of the backlash, and the load on the components for driving the opening / closing body can be reduced.

Hereinafter, the effects of the present invention will be exemplified.
(1) Since the opening / closing body on the toilet opens with a smooth operation feeling and can be reproduced repeatedly, the commercial value is improved.
(2) In order to generate the motor torque necessary for the opening / closing body such as the toilet seat or the toilet seat to start moving after the backlash is packed, to a transmission mechanism that connects between the motor and the toilet seat etc. It is possible to reduce the stress and extend the life of those components.
(3) Even if the backlash increases due to long-term use of the product, the motor torque is controlled according to the backlash size, so start moving the toilet seat or the open / close body such as the toilet seat after filling all backlash Therefore, the phenomenon that the opening / closing body cannot be fully opened or closed is prevented.

  In a preferred embodiment of the present invention, when the control means opens the closed opening / closing body, the detection means confirms that the rotation shaft of the motor is temporarily stopped after outputting the first torque. Then, the second torque is output. According to this embodiment, it is possible to reliably confirm that the play has been stuffed, and to always open the opening / closing body on the toilet bowl after the operation origin of the opening / closing body itself on the toilet bowl and the origin on the motor control coincide with each other. .

  In a preferred embodiment of the present invention, the control means variably sets a period for outputting the first torque based on the detection by the detection means. According to this aspect, the first and second torques are output for appropriate periods according to changes in play over time or between lots.

  In a preferred embodiment of the present invention, the detecting means detects the rotational speed of the motor by detecting the speed of the rotating shaft of the motor or the speed of a component corresponding to the rotational speed of the motor.

  In a preferred embodiment of the present invention, a rotation sensor such as a Hall IC can be used as the detection means, and a microcomputer that operates according to a predetermined program can be used as the control means.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of an electric opening / closing device for an opening / closing body on a toilet according to an embodiment of the present invention. 2 (A) and 2 (B) are operation diagrams for explaining the concept of an electric opening / closing device for an opening / closing body on a toilet according to an embodiment of the present invention. A fully closed state, (B) shows a state where the opening / closing body starts to open.

  Referring to FIG. 1, according to the electric opening / closing device of the opening / closing body on the toilet according to an embodiment of the present invention, when opening the opening / closing body 2 on the toilet 1 from the completely closed state, The entrainment process for outputting the first torque is executed, and the normal process for outputting the second torque is executed in the B section.

  However, section A is a section in which there is a backlash between the torque transmission path of the motor and the opening / closing body 2, and the opening / closing body 2 does not move even when the motor is driven with the first torque. In section B, the backlash between the torque transmission path of the motor and the opening / closing body 2 is clogged, and the opening / closing body 2 starts to move when the motor outputs the second torque until the opening / closing body 2 is stopped by the stopper 21. It is a section. The first torque is smaller than the torque required to move the opening / closing body 2 when the closed opening / closing body 2 is opened, and more than the torque required to close the backlash between the motor and the torque transmission path of the opening / closing body 2. Is a large torque. The second torque is a torque larger than a torque necessary for moving the opening / closing body 2.

  FIG. 2A is an operation diagram corresponding to the A section of FIG. 1, in which the backlash between the motor and the torque transmission path of the opening / closing body 2 (opening / closing body biased portion 20) is blocked. It is a section. In section A, the motor rotating shaft 5 is rotated by the first torque (backlash output).

  FIG. 2B is an operation diagram corresponding to the B section in FIG. 1, and the B section is a section after the play is clogged. In this B section, the motor rotating shaft 5 is rotated by the second torque.

  FIG. 3 is a side view of a toilet having a built-in electric opening / closing device for an opening / closing body on the toilet according to one embodiment of the present invention. FIG. 4 is an enlarged side view of the electric switchgear built in the toilet shown in FIG.

  Referring to FIG. 3, a toilet seat 3 and a toilet lid 4 are disposed on the toilet 1 as an opening / closing body. The electric opening and closing of the toilet seat 3 and the toilet lid 4 is controlled by the control means 10. The toilet seat 3 and the toilet lid 4 are opened and closed with the opening / closing body axis 2a as a rotation axis.

  Referring to FIG. 4, an electric opening / closing device for an opening / closing body on a toilet according to an embodiment of the present invention transmits a motor M as a driving source and a torque output from the motor M to the opening / closing body 2 on the toilet 1. A transmission mechanism (multi-stage reduction gear train) 8, a Hall IC 9 which is a detection means for detecting the rotational speed of the motor M, particularly the motor rotating shaft 5, and a control means for controlling the torque of the motor M based on the detection by the Hall IC 9 ( A microcomputer 10.

  When the control means 10 opens the closed opening / closing body 2, it is initially less than the torque required for the motor M to move the opening / closing body 2 and the backlash between the motor M and the torque transmission path of the opening / closing body 2 is reduced. The first torque larger than the torque required for the motor is output, and then, when the Hall IC 9 detects at least a decrease in the motor rotation speed, the second torque larger than the torque required for moving the opening / closing body 2 is output. .

  A detection signal (Hall IC signal) 11 corresponding to the motor rotation speed output from the Hall IC 9 is input to the control means 10. Based on the detection signal 11, the control means 10 outputs a control signal 12 for controlling the torque output from the motor M. In this embodiment, the motor M is PWM controlled, and the torque output from the motor M increases as the duty ratio increases.

  Next, the operation of the electric opening / closing device for the opening / closing body on the toilet according to the embodiment of the present invention described above will be described. FIG. 5 is a flowchart for explaining the operation of the electric switchgear shown in FIG. FIG. 6 is a timing chart for explaining the operation of the electric switchgear shown in FIG.

  Referring to FIG. 5, when opening the closed opening / closing body, in step S <b> 1, the control means 10 designates an output value (first torque) for backlashing and drives the motor M, and the backlashing period. Start counting of the limit timer. For example, the control means 10 drives the motor M by PWM control with a duty ratio of 10%. At a duty ratio of 10%, the opening / closing body 2 does not move.

  In step S2, the control means 10 determines the rotational speed of the motor M based on the H / L interval of the detection signal (Hall IC signal) 11 output from the Hall IC 9, and if the H / L switching does not exceed a predetermined time, It is determined that the backlash is clogged (the motor rotating shaft 5 is locked), and the process proceeds to step S4. On the other hand, if there is a H / L switching (when the motor rotating shaft 5 is rotating), the control means 10 proceeds to the process of step S3, and if the timer has not timed up, the control means 10 proceeds to the process of step S2. Returning, if the time is up, the process proceeds to step S4 in order to prevent the phenomenon that the opening / closing body 2 does not open electrically.

  The control means 10 stops the output of the motor M in step S4, and immediately specifies the output value (second torque) for driving the opening / closing body 2 and drives the motor M in step S5. For example, the control means 10 drives the motor M by PWM control with a duty ratio of 100%. The control means 10 preferably feedback-controls the duty ratio based on the detection signal 11, that is, the rotational speed of the motor rotating shaft 5.

  In step S6, the control means 10 determines the rotational speed of the motor M based on the H / L interval of the detection signal 11 output from the Hall IC 9. The control means 10 determines that the opening / closing body 2 is locked, for example, when the opening / closing body 2 is locked by the stopper 21 of FIG. The process proceeds to step S8, the output of the motor M is stopped, and if there is a H / L switching (when the opening / closing body 2 is rotating), the process proceeds to step S7. In step S7, the control means 10 counts the number of H / L switching of the detection signal 11 output from the Hall IC 9, and if the number of H / L switching exceeds the limit value, the control means 10 proceeds to step S8 and moves to the motor M. If the output is not exceeded, the process returns to step S6.

  According to the above flowchart, an experiment was conducted to open the toilet seat and toilet lid with the actual machine. In FIG. 6, CH1 is a waveform of the detection signal 11 indicating the rotation speed of the motor rotating shaft 5, and CH2 is a waveform of the control signal 12 indicating the duty ratio of the PWM signal for driving and controlling the motor M. The duty ratio was 10% in the A section and 100% in the B section. The lock detection period of step S2 in FIG.

  Referring to FIG. 6, in section A where the backlash is packed, the toilet seat and the toilet lid do not move and only the backlash is packed, and the motor rotation shaft is stopped for about 100 ms after the backlash is jammed. Subsequently, when the duty was increased, that is, in the B section, the motor rotating shaft started moving again, and the toilet seat and toilet lid began to open. In the A section where the backlash is packed, especially at the end, there is no rattling sound such as a transmission mechanism connecting the motor and the toilet seat, for example, a reduction gear train, and the toilet seat etc. also when transitioning from the A section to the B section The opening and closing body of the door opened with a smooth motion feeling. Moreover, when this experiment was repeated, the same effect was reproduced repeatedly.

  The present invention is suitably applied to an automatic opening / closing device for a toilet seat and / or a toilet lid. Further, the present invention is preferably applied to a device that reduces the torque of a motor and transmits it to a toilet seat and / or toilet lid by a multistage reduction mechanism, for example, a multistage reduction gear mechanism.

It is a conceptual diagram of the electric switchgear of the switch body on the toilet bowl which concerns on one Example of this invention. (A) And (B) is an operation figure for explaining the concept of the electric opening and closing device of the opening and closing body on the toilet according to one embodiment of the present invention, (A) is the opening and closing body is fully closed The state (B) shows a state where the opening / closing body starts to open. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a side view of the toilet bowl which incorporates the electric switchgear of the opening-closing body on the toilet bowl based on one Example of this invention. It is a side surface enlarged view of the electric switchgear built in the toilet shown in FIG. 5 is a flowchart for explaining the operation of the electric switchgear shown in FIG. It is a timing chart for demonstrating operation | movement of the electric switchgear shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet bowl 2 Opening-closing body 2a Opening-closing body axis | shaft 3 Toilet seat 4 Toilet lid 5 Motor rotating shaft (motor output shaft)
6 Worm gear 7 Worm wheel 8 Transmission mechanism (multi-stage reduction gear train)
9 Hall IC (detection means)
10 Control means (motor control means, microcomputer)
11 Detection signal (Hall IC signal)
12 Control signal (PWM signal)
20 Opening / Closing Body Energized Part 21 Stopper A Section where the backlash is packed B Section where the opening / closing body is moved R Lock period M Motor

Claims (3)

A motor as a drive source;
A transmission mechanism for transmitting torque output by the motor to an opening / closing body on the toilet;
Detecting means for detecting the rotational speed of the motor;
A means for controlling the torque of the motor based on the detection by the detection means, and when the closed opening / closing body is opened, the torque is initially smaller than the torque required for the motor to move the opening / closing body. And outputting a first torque larger than the torque necessary to close the backlash between the motor and the torque transmission path of the opening / closing body, and then detecting the decrease in the rotational speed when the detection means detects at least the decrease in the rotational speed. Control means for outputting a second torque larger than a torque required for moving the body;
An electric switchgear for an openable / closable body on a toilet bowl.   The control means outputs the second torque after the stop of the rotating shaft of the motor is confirmed by the detecting means after outputting the first torque when opening the closed opening / closing body. The electric opening / closing device of the opening / closing body on the toilet bowl according to claim 1.   3. The electric opening / closing device for an opening / closing body on a toilet according to claim 1, wherein the control means variably sets a period during which the first torque is output based on the detection by the detection means. .

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