JP4300686B2 - Toilet seat / toilet lid electric switchgear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a means for protecting the toilet seat / toilet lid electric opening / closing device particularly against overload.
[0002]
[Prior art]
Conventionally, this type of toilet seat / toilet lid electric opening / closing device is generally disclosed in Japanese Patent Laid-Open No. 6-105757. This device is equipped with a toilet seat or toilet lid opening / closing angle sensor and a rotation detection sensor that detects the rotation of the toilet seat or toilet lid. The rotation detection sensor detects that the toilet seat or toilet lid has stopped rotating due to an overload. Is detected, a closed loop is constituted by a direct current motor for rotating the toilet seat or toilet lid via a switch means from a microcomputer.
[0003]
[Problems to be solved by the invention]
However, the protection means against overload used in the conventional toilet seat / toilet lid electric opening / closing device determines that the overload has acted by detecting that the rotation of the toilet seat or toilet lid is stopped by the rotation detection sensor. Therefore, it takes time to determine that the rotation has stopped, and there is a problem that sufficient protection against overload cannot be obtained.
[0004]
Next, a mechanism that causes overload will be described. Conventional toilet seat / toilet lid electric opening and closing devices have been used with a DC motor decelerated by power transmission means to increase the torque from 100 to 200 times. In this configuration, for example, when the user forcibly applies force in the closing direction to the toilet seat that is rotating in the opening direction, the forced rotation torque of the toilet seat that is generated when the user applies force to the tip of the toilet seat is It easily reaches several times the rotational torque generated in the toilet seat / toilet lid electric switchgear. The direct current motor is rapidly decelerated with a strong torque to stop the rotation direction.
[0005]
The rotor of a DC motor rotating at a high speed has a considerable moment of inertia, and an inertial force corresponding to the time interval until it stops is generated by being rapidly decelerated. An example of this inertial force evaluation is shown in FIG. Torque that is about twice the steady torque is generated in 20 msec until the DC motor stops.
[0006]
Further, the torque of the DC motor increases as the rotational speed decreases under a constant voltage condition, and when the rotational speed becomes zero, the torque becomes about twice that in steady rotation. Therefore, in the case of 20 msec before the DC motor stops, about 4 times the normal torque may act on the power transmission means.
[0007]
Therefore, in order to protect the toilet seat / toilet lid electric switchgear from this type of overload, it was necessary to stop the voltage application at the DC motor at the earliest possible timing.
[0008]
In addition, when a shocking force is applied to the toilet seat or toilet lid and a sudden acceleration force is applied, if the DC motor terminals are short-circuited, the braking force due to the DC motor back electromotive force is large, and the DC motor drive torque Is apparently large, and there is a problem that a large load is normally generated in a power transmission system composed of gears.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a DC motor that opens and closes a toilet seat and a toilet lid via a power transmission unit, a rotation angle detection unit that detects a rotation angle of the toilet seat and the toilet lid, and the rotation angle detection unit. An angular velocity calculating means for calculating a temporal change of the obtained angle, and applying an voltage to the DC motor when the absolute value of the angular acceleration, which is the temporal change amount of the angular velocity, exceeds a predetermined value. Is provided with a control means for stopping the operation.
[0010]
According to the above invention, since the amount of change in the rotational angular velocity that occurs when the impact force is applied to the toilet seat or the toilet lid is detected, it is possible to detect when the impact force is generated. Is stopped and the load between the DC motor terminals is opened, whereby the load on the DC motor and the power transmission means can be minimized.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The inventions of claim 1, wherein, a DC motor for opening and closing the toilet seat及 beauty / or toilet lid, and power transmission means for transmitting the power of the direct current motor to the toilet seat and / or toilet lid, the power transmission Angle detecting means provided in a power transmission path from the means to the toilet seat and / or toilet lid, and angular velocity calculating means for calculating the angular velocity by sampling the angle obtained from the angle detecting means at a predetermined time interval Δt. Then, the angular velocity v1 at the time t1 obtained from the angular velocity calculation means during the opening operation of the toilet seat or toilet lid changes by a predetermined value, for example, 50% or more, compared with the angular velocity v0 sampled before Δt time of the time t1. In this case, the voltage application to the DC motor is stopped, and if the speed v2 sampled after Δt time t1 is in the open direction, the voltage application to the DC motor is resumed. And, the velocity v2 are those having a control unit that remains stopped voltage applied to the DC motor if the closing direction.
[0012]
Then, in order to determine whether the data in which the angular velocity v1 at time t1 has changed by 50% or more compared to the angular velocity v0 sampled before Δt time t1 is simply noise, or whether the velocity has actually changed, it is once DC Stop applying voltage to the motor, move it freely, and if the speed v2 sampled after Δt time of time t1 is the open direction, restart the voltage application to the DC motor, and if the speed v2 is the closing direction Control is performed so that voltage application to the DC motor remains stopped. Indeed there is a change in the angular velocity as possible out to determine the quick accurate or mere noise are.
[0013]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0014]
Example 1
FIG. 1 is an external view of a sanitary washing device equipped with the toilet seat / toilet lid electric opening / closing device of Embodiment 1 of the present invention. FIG. 2 is a configuration diagram of the drive unit of the toilet seat / toilet lid electric opening / closing device. 3 is a system configuration diagram of the apparatus, FIG. 4 is an explanatory diagram of operating characteristics of the apparatus, and FIG. 5 is an explanatory diagram of operating characteristics due to external force.
[0015]
The following description focuses on the electric opening and closing of the toilet seat, but the same applies to the electric opening and closing of the toilet lid.
[0016]
In the figure, 1 is a toilet, a low tank 2 is fixed behind the toilet 1, and a sanitary washing device 3 is mounted on the toilet 1. The sanitary washing device 3 incorporates a toilet seat / toilet lid electric opening / closing device 6 that electrically opens and closes the toilet seat 4 and the toilet lid 5. The toilet seat / toilet lid electric opening / closing device 6 includes a DC motor 7 using a commutator motor on the drive side of the toilet seat 4, a power transmission means 8 constituted by a speed reduction mechanism using a gear train, and an output side of the power transmission means 8. The angle detection means 9 is composed of a potentiometer inserted into the stool, and the drive side of the toilet lid 5 similarly has a DC motor 27, a power transmission means 28, and an angle detection means 29.
[0017]
The electric opening / closing control unit 10 will be described with respect to the toilet seat 4 side. The DC motor drive circuit 11 that controls the DC motor 7, the output port 12 to the DC motor drive circuit 11, and the rotation angle corresponding to the opening angle of the toilet seat 4 It is controlled by a microcomputer 14 having an input port 13 for taking in a signal from an angle detection means 9 for detecting.
[0018]
The microcomputer 14 further includes an angular velocity calculation unit 15 that calculates a temporal change in the rotation angle of the toilet seat 4 obtained from the angle detection unit 9 and an angular acceleration that calculates a temporal change in the angular velocity obtained from the angular velocity calculation unit 15. Arithmetic means 16 is provided. The angular velocity calculation means 15 is constituted by a calculation routine that subtracts the previous value and the current value at each time interval, and divides the angle value taken from the angle detection means 9 at a predetermined time interval by the time interval. However, in the relative comparison, it is only necessary to subtract the angle value at each time interval. The angular acceleration calculating means 16 is composed of a routine that subtracts the angular velocity value obtained from the angular velocity calculating means 15 at each time interval and divides the value by the time interval. For relative comparison, the angular velocity value is subtracted. A configuration that only needs to be done.
[0019]
Next, the operation and action will be described. When an open signal is input to the microcomputer 14, a voltage is applied to the DC motor 7 in a predetermined routine to drive the toilet seat 4 in the opening direction. The toilet seat 4 rotates at a predetermined angular velocity, reaches the open position, and stops.
[0020]
A case where a shocking force is applied to the toilet seat 4 such as when the user tries to close the toilet seat 4 forcibly when the toilet seat 4 rotates in the opening direction will be described with reference to FIG. The toilet seat 4 rotates with a predetermined driving force from the state of being in contact with the toilet 1, but the rising is due to the moment of inertia of the toilet seat 4, and there is a rising section of the rotational speed. Thereafter, the toilet seat 4 rotates at a predetermined speed. I will do it. When an impact force is applied at the point B, the rotational speed of the toilet seat 4 is rapidly reduced and is rapidly decelerated to the points C and D, and the rotational direction is reversed from 0 to the stop and further to the closing direction. The angular velocity of the toilet seat 4 is evaluated by the angular velocity calculating means 15 of the microcomputer 14, and the change amount of the angular velocity is evaluated by the angular acceleration calculating means 16. When the absolute value of the angular acceleration exceeds twice the reference value, the microcomputer 14 performs control such that the voltage application to the DC motor 7 is stopped and the terminals of the DC motor 7 are opened.
[0021]
Then, the occurrence of an impact force due to an external force applied to the toilet seat 4 is detected by the amount of change in the angular velocity of the toilet seat 4, that is, the angular acceleration, and when the absolute value of this angular acceleration exceeds twice the steady value, by determining, detected by time point of generation of impact forces applied to the seat 4, in a halting the input of the direct current motor 7 at this time, by stopping the electric drive force of the DC motor 7 The rotational force of the DC motor 7 is suppressed, the load on the power transmission means 8 is minimized, and the gear train is prevented from being damaged.
[0022]
(Example 2)
A second embodiment of the present invention will be described with reference to FIG. The difference from the first embodiment is that the magnitude of the impact force on the toilet seat 4 is evaluated based on the magnitude of the angular acceleration when the toilet seat 4 is within a predetermined operating angle range. The angular acceleration is not determined by the angular acceleration detection means 15. In FIG. 3, the determination based on the angular acceleration is not performed in the angular region GH where the toilet seat 4 stands up and the angular region IJ near the open position of the toilet seat 4, and the determination based on the angular acceleration is performed in the angular region HI. The angle region HI is preferably set to 15 degrees from the horizontal position and 20 degrees from the open position.
[0023]
Next, the operation and action will be described. In the angle region GH and the angle region IJ, the toilet seat 4 is a region in which the rotation speed changes greatly from stop to rotation, or from rotation to stop, and angular acceleration due to external force. Or a change in angular acceleration due to motion control of the toilet seat 4. In addition, since this region is also a region where it is difficult to apply an external force in terms of the operating angle, malfunctions can be prevented by detecting angular acceleration in the angular region HI that excludes these regions from the region where changes in angular acceleration are detected. , Can operate stably.
[0024]
(Example 3)
FIG. 6 is an explanatory diagram of a control sequence according to the fourth embodiment of the present invention. The difference from the first embodiment is that the angular velocity V is calculated from the angle information sampled by the angle detection means 9 at a predetermined time interval Δt, and the angular velocity V is less than half compared to the value sampled last time. In such a case, the input to the DC motor 7 is stopped and the value of the angular velocity after Δt time is evaluated to determine whether the change of the angular velocity is actually an angular velocity or electric noise. It is a point that has been configured.
[0025]
When the angular velocity v1 at time t1 obtained from the angular velocity calculating means 15 is 50% or less compared to the angular velocity v0 sampled before Δt time at time t1, the application of voltage to the DC motor 7 is stopped, and If the speed v2 sampled after Δt time t1 is in the open direction, the voltage application to the DC motor 7 is resumed, and if the speed v2 is in the closed direction, the voltage application to the DC motor 7 is stopped. A control sequence is provided.
[0026]
Next, the operation and action will be described. The angular velocity v1 at time t1 obtained from the angular velocity calculation means 15 when the user applies force to the toilet seat 4 is 50% or less compared with the angular velocity v0 sampled before Δt time at time t1. Based on this, after applying the voltage to the DC motor 7 is stopped and the power transmission means is in a free state to reduce the impact force, the change in the sampled angular velocity is caused by the impact force. In order to determine whether or not it is just electrical noise, if the speed v2 after a time Δt is further detected and the speed v2 is in the open direction, there is no impact force in the closing direction of the toilet seat 4, and electrical noise If it is determined that there is a voltage, the application of the voltage in the opening direction of the toilet seat 4 is resumed. If the speed v2 is in the closing direction, it is determined that the impact force has been applied and the voltage application to the DC motor 7 is stopped. In .
[0027]
(Example 4)
FIG. 7 is a system configuration diagram of Embodiment 4 of the present invention, and FIG. 8 is an explanatory diagram of the operation sequence. The difference from the first embodiment is that a drive current detection means 17 is connected to a DC motor drive circuit 11 that controls the DC motor 7.
[0028]
Next, the operation and action will be described. If the current value A1 obtained at the time t1 obtained from the drive current detecting means during the opening operation of the toilet seat or the toilet lid increases by 20% or more compared to the current value A0 sampled before Δt time at the time t1, the direct current motor The control means for stopping the application of the voltage to is provided.
[0029]
And control which detects an overload by detecting the drive current of the direct current motor which opens and closes a toilet seat and / or a toilet lid through a power transmission means is performed.
[0030]
By the child detecting an overload and the current value of the direct corresponding DC motor, it can be prevented accurately overload.
[0031]
(Example 5)
FIG. 9 is a system configuration diagram of the fifth embodiment of the present invention. The difference from the fourth embodiment is that the driving current detecting means 17 for detecting a change in the driving current of the DC motor 7 and the angular acceleration calculation for evaluating the amount of change in angular velocity. The difference is that both means 16 are provided.
[0032]
Next, the operation will be described. The angular velocity v1 at the time t1 by the angular velocity calculating means 15 that calculates the angular velocity by sampling the angle obtained from the angle detecting means 9 at a predetermined time interval Δt was sampled before Δt time of the time t1. The current value A1 at the time t1 obtained by the drive current detecting means 17 is changed by 50% or more compared with the angular velocity v0, and the current value A1 obtained by the time Δt before the time t1 is changed by 20% or more. In this case, application of voltage to the DC motor 7 is stopped. When the external force is applied to the toilet seat 4, both the change in the angular velocity of the toilet seat 4 and the change in the current value of the DC motor 7 are monitored, and when both are determined to be abnormal, The voltage application is stopped, and an overload state can be reliably avoided without malfunction.
[0033]
(Example 6)
FIG. 10 is a system configuration diagram of Embodiment 6 of the present invention, and FIG. 11 is an explanatory diagram of the control sequence. The difference from the first embodiment is that the motor drive circuit 11 is provided with a means for short-circuiting the terminals of the DC motor 7 and is moved in a state where the terminals of the DC motor 7 are short-circuited. The difference is that the DC motor 7 terminals are opened when the value Vc is exceeded.
[0034]
Next, the operation will be described. In order to softly seat the toilet seat 4 on the toilet 1, the terminals of the DC motor 7 are short-circuited and the toilet seat 4 is forcibly operated in a mode in which a braking force is generated by a regenerative current. When moved, an impact force to the toilet seat 4 is generated. The braking force generated by the regenerative current is generated approximately in proportion to the speed at which the toilet seat 4 is forcibly moved. When the toilet seat 4 is moved at a high speed from the outside, an excessive load is generated on the power transmission means 8. When the angular velocity V1 by the angular velocity calculating means 15 exceeds a predetermined value Vc, the braking force due to the regenerative current generated in the DC motor 7 is released by opening the terminals of the DC motor 7, and the load on the power transmission means 8 Is reduced. The predetermined value Vc is preferably set to about 1.5 times the normal angular velocity.
[0035]
If the rotation angle of the toilet seat 4 is close to the horizontal position after the terminal of the DC motor 7 is released, shorting the terminal of the DC motor 7 again prevents the toilet seat 4 from colliding with the toilet 1. This is desirable.
[0036]
【The invention's effect】
As described above, according to the present invention, when the temporal change amount of the angular velocity of the toilet seat or the toilet lid exceeds a predetermined value, the input to the DC motor is stopped. The detection at the time of occurrence of this is made possible, and the input to the DC motor and the power transmission means can be minimized by stopping the input of the DC motor at this time.
[0037]
In addition, in order to detect a sudden increase in the drive current of the DC motor due to an abnormal load acting on the toilet seat or toilet lid, it is possible to detect when a shocking force is generated, and at this point the DC motor input is stopped. By doing so, the load on the DC motor and the power transmission means can be minimized.
[0038]
Further, in the mode in which the brake is applied by the regenerative current, when the angular velocity exceeds a predetermined value, the DC motor terminal can be opened to reduce the load on the power transmission system.
[Brief description of the drawings]
FIG. 1 is an external view of a sanitary washing device equipped with a toilet seat / toilet lid electric switchgear according to a first embodiment of the present invention. FIG. 2 is a configuration diagram of a drive unit of the toilet seat / toilet lid electric switchgear. FIG. 4 is a diagram illustrating the operational characteristics of the apparatus. FIG. 5 is a diagram illustrating the occurrence of an overload. FIG. 6 is a diagram illustrating an operation sequence according to the third embodiment of the present invention. FIG. 8 is a diagram illustrating the operation sequence of the fourth embodiment. FIG. 9 is a system configuration diagram of the fifth embodiment of the present invention. FIG. 10 is a system configuration diagram of the sixth embodiment of the present invention. Example 6 Operation sequence explanatory diagram [Explanation of symbols]
4 Toilet seat 5 Toilet lid 7, 27 DC motor 8, 28 Power transmission means 9, 29 Angle detection means 14 Microcomputer (control means)
15 Angular velocity calculation means 16 Angular acceleration calculation means 17 Drive current detection means

Claims (1)

  A direct current motor for opening and closing the toilet seat and / or toilet lid; power transmission means for transmitting power of the direct current motor to the toilet seat and / or toilet lid; and from the power transmission means to the toilet seat and / or toilet lid An angle detection means provided in the power transmission path to be reached, and an angular velocity calculation means for calculating an angular velocity by sampling an angle obtained from the angle detection means at a predetermined time interval Δt, and the toilet seat and / or the toilet lid When the angular velocity v1 at the time t1 obtained from the angular velocity calculating means during the opening operation changes by a predetermined value or more compared to the angular velocity v0 sampled before Δt time at the time t1, the voltage is applied to the DC motor. If the speed v2 sampled after Δt time t1 is in the open direction, the voltage application to the DC motor is resumed and the speed v2 is in the closing direction. Toilet seat toilet lid electric switchgear comprising a control means for remains stopped voltage applied to the field the DC motor.

Images