JP4466463B2 - Opening and closing mechanism of toilet lid and toilet seat - Google Patents

Description

  The present invention relates to an opening / closing mechanism for automatically opening and closing a toilet lid and a toilet seat by a motor using a human sensor, an opening / closing button, and the like.

  In general, as a kind of toilet seat 3 having a toilet lid 1 and a toilet seat 2 as shown in FIG. 6, an open / close switch provided on the toilet seat 3 when a person close to the toilet seat 3 is sensed Has been developed that automatically opens and closes the toilet lid 1 and toilet seat 2 around their supporting shaft 4 by operating a motor-driven opening / closing mechanism provided in the interior 3a when the operator is operated. Has been.

  In the toilet seat 3 having such an opening / closing mechanism, only the toilet lid 1 may be opened / closed or both the toilet lid 1 and the toilet seat 2 may be opened / closed depending on the usage pattern. For this reason, normally, in this type of opening / closing mechanism, a DC motor for driving the toilet lid 1 and a DC motor for driving the toilet seat 2 are provided independently, and the two motors are appropriately selected according to the use form. The drive is controlled.

  However, since the rotational speed of the DC motor changes depending on the load, particularly when the toilet lid 1 and the toilet seat 2 are opened and closed at the same time, both of them interfere with each other and generate a loud sound. It was.

  Therefore, in order to control the rotational speeds of the two DC motors, a separate sensor for detecting the rotational speed of the motor, a sensor for detecting the position of the toilet lid 1 and the toilet seat 2, and the like are required, which increases manufacturing costs. There was a problem.

  Therefore, as a conventional opening / closing mechanism that solves the above problems, for example, as seen in Patent Document 1 below, toilet seat / toilet lid automatic opening / closing provided with respective drive motors for independently opening / closing the toilet lid and toilet seat In the apparatus, when the toilet seat and the toilet lid are simultaneously driven to close, the toilet lid drive motor is closed until a predetermined angle, and only the toilet seat drive motor is closed after the predetermined angle. .

According to the conventional toilet lid and toilet seat opening / closing mechanism having the above configuration, in the initial stage of the closing drive, the toilet seat and the toilet lid are driven by the toilet lid drive motor, and at the end, the toilet seat and the toilet lid are driven by the toilet seat drive motor. Since it is driven, the toilet seat and the toilet lid can be closed while being in close contact with each other, so that there is no problem that the toilet seat and the toilet lid collide during the closing operation and a loud noise is generated. .
Japanese Patent Laid-Open No. 2004-024362

  However, in the conventional toilet lid and toilet seat opening / closing mechanism, the drive used for opening and closing only the toilet lid, opening both the toilet lid and toilet seat, and further closing both the toilet lid and toilet seat are used. Since it is necessary to switch the motor, there is a problem that the control becomes complicated.

  The present invention has been made in view of such circumstances, and provides a toilet lid and a toilet seat opening / closing mechanism that is simple in structure and that can easily open and close the toilet lid and toilet seat with one DC motor. This is a problem.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a stool in which a toilet lid opening / closing gear provided on a toilet lid and a toilet seat opening / closing gear provided on a toilet seat are opened / closed by a single motor via a gear train. A lid / toilet seat opening / closing mechanism that rotates the toilet lid drive gear when the motor rotates in one rotation direction and rotates the toilet seat drive gear when rotated in the other rotation direction; A first gear train having a first intermediate gear that is rotationally driven by the toilet lid driving gear and the toilet lid driving gear and meshes with the toilet lid opening / closing gear, the toilet seat driving gear, and the toilet seat driving gear A first gear that is driven to rotate and meshes with the toilet lid opening and closing gear; and a second gear train that includes a second intermediate gear having a second gear that meshes with the toilet seat opening and closing gear. Columns and In either one of the second gear trains, an idle gear for making the rotation directions of the first intermediate gear and the second intermediate gear the same direction is interposed, and the first gear and the second gear are respectively A tooth missing region is formed in the circumferential direction, the first gear is arranged with the missing region facing the toilet lid opening / closing gear, and the second gear opens and closes the toilet seat opening / closing of the toilet seat. The tooth rotation direction start end that faces the gear and that is formed by the missing region is disposed at a position rearward in the rotation direction from the tooth rotation start end of the first gear. To do.

  Here, the invention described in claim 2 is characterized in that the second intermediate gear is provided rotatably relative to the shaft of the first intermediate gear.

In the invention according to claim 1 or 2, when only the toilet lid is opened, the motor is rotated in one rotation direction. Then, the toilet lid driving gear in the first gear train is rotated by the motor, whereby the first intermediate gear is rotated, and the toilet lid opening / closing gear meshing with the first intermediate gear is rotated, whereby the toilet lid is opened.
At this time, in the second gear train, the first gear that meshes with the toilet lid opening / closing gear is arranged so that the missing region faces the toilet lid opening / closing gear, and therefore does not rotate.

  On the other hand, when both the toilet lid and the toilet seat are opened, the motor is rotated in the other rotation direction. Then, the toilet seat drive gear in the second gear train is rotated by the motor, and the second intermediate gear is rotated by the first gear driven thereby. As a result, when the first gear rotates through a predetermined angle and reaches the start of the tooth rotation direction from the missing region, the toilet lid opening / closing gear meshes and starts rotating, thereby opening the toilet lid. .

  Next, when the second intermediate gear further rotates, the second intermediate gear meshes with the toilet seat opening / closing gear by reaching from the missing region of the second gear to the tooth rotation start point. Thereby, it opens with a fixed delay with respect to the opening of the toilet lid.

At this time, the toilet lid opening / closing gear and the toilet seat opening / closing gear can be rotated in the same direction by an idle gear interposed in one of the first gear train and the second gear train. Further, by turning off the power of the motor, the toilet lid and the toilet seat can be closed using their own weight due to rotational friction or the like in the first and second gear trains.
Thus, according to the toilet lid and toilet seat opening / closing mechanism, the structure is simple and the toilet lid and toilet seat can be easily opened and closed by one DC motor.

1 to 5 show an embodiment of a toilet lid and toilet seat opening / closing mechanism according to the present invention, and the configuration of the toilet seat 3 is the same as that shown in FIG. To simplify the description.
In FIG. 2, reference numeral 10 denotes an output gear of the DC motor. A drive gear 11 is engaged with the output gear 10, and a swing shaft that swings by the rotation of the drive gear 11. 11a is provided integrally.

  A long hole 11b is formed in the swing shaft 11a, and the pin 12a of the rack 12 is engaged with the long hole 11b, whereby the rotation of the drive gear 11 is converted into a linear motion of the rack 12. It is like that. Here, teeth 12b are formed on the surface of the rack 12 except for both ends thereof, and the toilet lid drive gear 13 and the toilet seat drive gear 14 are freely rotatable at both end portions 12c where the teeth 12b are not formed. Is arranged. The output gear 10, the drive gear 11 having the swing shaft 11a, and the rack 12 constitute a drive mechanism in the opening / closing mechanism.

  As shown in FIGS. 1 to 3, a pinion 13a is integrally formed on the toilet lid driving gear 13 that meshes with the teeth 12b of the rack 12, and a first intermediate gear 15 is disposed on the pinion 13a side. ing. The first intermediate gear 15 includes a main gear 15b and a width gear 15c which are integrally provided at both ends of a shaft 15a, and is rotatably provided by bearings 16a and 16b.

The width gear 15c of the first intermediate gear 15 is meshed with the pinion 13a, and the toilet lid opening / closing gear for opening and closing the toilet lid 1 by providing the main gear 15c on the rotating shaft of the toilet lid 1. 17 is meshed.
The toilet lid drive gear 13 and the first intermediate gear 15 constitute a first gear train.

On the other hand, an idle gear 18 is meshed with the pinion 14 a formed integrally with the toilet seat drive gear 14, and the idle gear 18 is meshed with the second intermediate gear 20.
The second intermediate gear 20 is formed by integrally forming a pinion (second gear) 21 and a main gear (first gear) 22, and the first intermediate gear 15 is formed in a hole formed in the center thereof. When the shaft 15a is inserted loosely, the first intermediate gear 15 is provided so as to be relatively rotatable and movable in the axial direction.

Here, the main gear 22 is formed to have the same diameter as the main gear 15 b of the first intermediate gear 15.
Further, a spring that urges the second intermediate gear 20 toward the first intermediate gear 15 between the main gear 22 of the second intermediate gear 20 and the wall portion 23 provided in the interior 3 a of the toilet seat 3. 24 is interposed.

  Further, as shown in FIGS. 4 and 5, the side surface of the main gear 15b of the first intermediate gear 15 facing the second intermediate gear 20 protrudes toward the second intermediate gear 20 side, and the front end surface. The engaging convex part 25 in which the inclined surface 25a was formed in is formed. The engaging convex portions 25 are formed in an arc shape having a central angle θ of 40 °, and are formed at two locations spaced by 180 ° in the circumferential direction.

  On the other hand, on the opposite side surface of the pinion 21 of the second intermediate gear, the engaging convex portion 25 is engaged, and a concave portion 26 is formed with an inclined surface 26a along the inclined surface 25a formed at the bottom. .

A toilet seat opening / closing gear 27 for opening and closing the toilet seat 2 in mesh with the pinion 21 side of the second intermediate gear 20 is disposed. Further, the main gear 22 of the second intermediate gear 20 is arranged at a position that meshes with the toilet lid opening / closing gear 17 for opening and closing the toilet lid 1.
A second gear train is configured by the second intermediate gear 20 having the toilet seat driving gear 14, the main gear 22 that meshes with the toilet lid opening / closing gear 17, and the pinion 21 that meshes with the toilet seat opening / closing gear 27.

  Here, as shown in FIG. 1, the pinion 21 and the main gear 22 of the second intermediate gear 20 are formed with tooth missing regions 21a and 22a in a range of a predetermined center angle in the circumferential direction, respectively. The main gear 22 is arranged with its missing region 22a facing the toilet lid opening / closing gear 17. Further, the pinion 21 has the missing region 21a facing the toilet seat opening / closing gear 27, and the tooth rotation direction start end 21b formed by the missing region 21a has a rotation direction that is greater than the tooth rotation direction start end 22b of the main gear 22. It is arranged to be located on the rear side.

When only the toilet lid 1 is opened by the toilet lid and toilet seat opening / closing mechanism having the above-described configuration, the output gear 10 of the motor is rotated counterclockwise in FIG. Then, the drive gear 11 is rotated in the clockwise direction by the output gear 10 of the motor and the swing shaft 11a swings to the right in the drawing, so that the rack 12 moves in the same direction.
Thereby, the toilet lid drive gear 13 meshed with the teeth 12b of the rack 12 rotates.

As a result, as shown in FIGS. 1 and 3, the main gear 15b rotates via the width gear 15c and the shaft 15a of the first intermediate gear 15 that meshes with the pinion 13a of the toilet lid driving gear 13, thereby The toilet lid opening / closing gear 17 meshing with the main gear 15b rotates to open the toilet lid 1.
At this time, since the main gear 22 of the second gear train 20 facing the toilet lid opening / closing gear 17 is arranged with its missing region 22a facing the toilet lid opening / closing gear 17, friction in the second gear train, It does not rotate due to friction caused by the spring 24.

In addition, as shown in FIGS. 4 and 5, when the main gear 15b of the first intermediate gear 15 rotates by 40 °, the inclined surface 26a of the concave portion 26 of the pinion 21 of the second intermediate gear 20 is changed to the main gear 15b. 5 is pressed by the inclined surface 25a of the engaging convex portion 25 and moves to the right in FIG. As a result, the second intermediate gear 20 is placed at a position where the pinion 21 and the main gear 22 deviate from the facing positions of the toilet seat opening / closing gear 27 and the toilet lid opening / closing gear 17, respectively.
In this way, when the toilet lid 1 is opened and the rotational speed of the motor reaches a value corresponding to the opening direction stop position of the toilet lid 1, the motor is stopped by a signal from a sensor that detects this.

  On the other hand, when both the toilet lid 1 and the toilet seat 2 are opened, the motor is rotated in the clockwise direction in FIG. Then, the drive gear 11 is rotated counterclockwise by the output gear 10 of the motor and the swing shaft 11a swings to the left in the figure, so that the rack 12 moves in the same direction, and the rack 12 The toilet seat drive gear 14 meshed with the teeth 12b rotates.

  As a result, as shown in FIGS. 1 and 3, the main gear 22 and the pinion 21 of the second intermediate gear 20 rotate via the idle gear 18 that meshes with the toilet seat drive gear 14. As a result, when the main gear 22 rotates a predetermined angle and reaches the tooth rotation direction start end 22b from the missing region 22a, the toilet lid opening / closing gear 17 meshes and starts rotating, so 1 begins to open.

  Next, when the second intermediate gear 20 is further rotated, it is engaged with the toilet seat opening / closing gear 27 by reaching from the missing region 21a of the pinion 21 to the tooth rotation direction start end 21b. As a result, the toilet seat 2 opens with a certain delay from the opening of the toilet lid 1. When the toilet lid 1 reaches the stop position in the opening direction, the motor is stopped by a signal from a sensor that similarly detects this. Further, by turning off the power of the motor, the toilet lid and the toilet seat can be closed using their own weight due to rotational friction or the like in the first and second gear trains.

  In the above embodiment, the case where the idle gear 18 is interposed between the pinion 14a of the toilet seat drive gear 14 and the second intermediate gear 20 has been described, but instead of this, the toilet lid drive gear 13 and An idle gear may be interposed between the first intermediate gear 15 and the first intermediate gear 15.

  Further, as shown in FIG. 2, the drive mechanism in this opening / closing mechanism has been described only in the case where a combination of the drive gear 11 and the rack 12 is used. However, the present invention is not limited to this. A mechanism for attaching a toilet lid drive gear 13 and a toilet seat drive gear 14 having a ratchet type engagement portion that allows rotation in only one direction on the inner peripheral surface to the gear 10 with their allowable rotation directions reversed. Other drive mechanisms can also be used.

It is a schematic block diagram which shows arrangement | positioning of the gearwheel in one Embodiment of this invention. It is a schematic block diagram which shows the drive mechanism in the said embodiment. It is a side view of FIG. It is a figure which shows the engagement convex part of the main gear of a 1st intermediate gear, (a) is a side view, (b) is a cross section which shows the engagement state of the said engagement convex part and the pinion of a 2nd intermediate gear. FIG. FIG. 4 is a side view showing a state where the second intermediate gear of FIG. 3 has moved. It is a perspective view which shows the external appearance shape of the toilet seat which has a general toilet lid and toilet seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet lid 2 Toilet seat 11 Driving gear 12 Rack 12b Tooth 13 Toilet lid driving gear 14 Toilet seat driving gear 15 First intermediate gear 17 Toilet lid opening / closing gear 18 Idle gear 20 Second intermediate gear 21 Pinion (second gear)
22 Main gear (first gear)
21a, 22a Missing region 21b, 22b Start direction of tooth rotation

Claims (2)

A toilet lid and toilet seat opening / closing mechanism for opening and closing a toilet lid opening / closing gear provided on the toilet lid and a toilet seat opening / closing gear provided on the toilet seat by one motor through a gear train,
A drive mechanism that rotates the toilet lid drive gear when the motor rotates in one rotation direction and rotates the toilet seat drive gear when rotated in the other rotation direction;
A first gear train having a first intermediate gear that is rotationally driven by the toilet lid driving gear and is engaged with the toilet lid opening and closing gear;
The toilet seat drive gear, a first gear that is rotationally driven by the toilet seat drive gear and that meshes with the toilet lid opening and closing gear, and a second intermediate gear that has a second gear that meshes with the toilet seat opening and closing gear. Two gear trains,
An idle gear for making the rotation directions of the first intermediate gear and the second intermediate gear the same direction is interposed in one of the first gear train and the second gear train,
The first gear and the second gear each have a tooth missing region in the circumferential direction, and the first gear is disposed with the missing region facing the toilet lid opening / closing gear. The second gear has the missing region facing the toilet seat opening / closing gear, and the tooth rotation direction start end formed by the missing region is located behind the tooth rotation direction start end of the first gear in the rotation direction. A toilet lid and a toilet seat opening and closing mechanism, wherein the toilet lid and the toilet seat are disposed at the same position.   2. The toilet lid and toilet seat opening / closing mechanism according to claim 1, wherein the second intermediate gear is provided so as to be relatively rotatable with respect to the shaft of the first intermediate gear.

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