JPH11332783A - Toilet seat and toilet cover opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of part items so as to reduce the cost and lessen the installation space for the parts. SOLUTION: A speed reducing mechanism 9 includes a pulley 12 and first to eighth gears G1-G8, and the rotation of a motor 2 is decelerated at a designated speed reduction ratio to be transmitted to a drive gear 16 of a differential gear mechanism 10. A pinion gear 17 is fixed to the drive gear 16 through a pinion shaft 18, and meshed with the toilet seat side and toilet cover side gears 19, 20, respectively. The seat side and cover side side gears 19, 20 are respectively connected to the seat side and cover side output shafts 21, 22, and the differential gear mechanism 10 transmits the rotating force of the motor 2 to the output shafts 21, 22 with smaller load between the seat side and cover side output shafts 21, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet seat and a toilet lid opening / closing apparatus for opening and closing a toilet seat and a toilet lid rotatably supported on a toilet body, respectively.

[0002]

2. Description of the Related Art As this kind of opening and closing device for a toilet seat and a toilet lid, two driving sources for driving the toilet seat and the toilet lid respectively are provided in order to individually drive the toilet seat and the toilet lid. In some cases, two transmission mechanisms for transmitting the driving force of the driving source to the rotating shaft of the toilet lid are provided (for example, see Japanese Patent Application Laid-Open No. 9-224352).

[0003]

In the opening and closing device for a toilet seat and a toilet lid having the above-described structure, a driving source and a transmission mechanism are separately provided for individually opening and closing the toilet seat and the toilet lid.
There has been a problem that the number of parts is increased, the manufacturing cost is increased, and the space for installing the parts is widened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the number of parts to reduce the cost and to reduce the space for installing parts. An opening and closing device is provided.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a toilet seat and a toilet lid rotatably supported by a toilet body, and a driving force of a drive source are applied to the toilet seat and the toilet. A transmission mechanism for transmitting to the rotation axis of the lid, the transmission mechanism includes a differential gear mechanism for selectively transmitting the driving force of the drive source to the rotation axis of the toilet seat and the rotation axis of the toilet lid,
Since the differential mechanism selectively transmits the driving force of the driving source to the toilet seat or the toilet lid, there is no need to separately provide a transmission mechanism for transmitting the driving force of the driving source to the toilet seat and the toilet lid. Can be reduced. In addition, since the gears of the differential gear mechanism are always meshed,
As in the case where the driving force is switched and transmitted to the rotating shaft of the toilet seat or the toilet lid by switching the meshing of the gears, when the meshing of the gears is switched, poor meshing and tooth skipping sound are not generated, It can be operated stably.

According to a second aspect of the present invention, in the first aspect of the invention, the differential gear mechanism transmits the driving force of the driving source to the lighter output shaft of the toilet seat side output shaft or the toilet lid side output shaft. Since power is transmitted to either the toilet seat side output shaft or the toilet lid side output shaft, the toilet seat or the toilet lid can be individually opened and closed.

According to a third aspect of the present invention, in the first aspect of the present invention, the differential gear mechanism selectively switches and transmits the driving force of one drive source to a rotating shaft on a toilet seat side or a toilet lid side. Thus, only one drive source is required to drive the toilet seat and the toilet lid, and the number of parts can be reduced.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a toilet seat side output shaft which is substantially cylindrical and outputs a driving force of a drive source to a rotating shaft of the toilet seat, and a substantially columnar toilet seat side is provided. A toilet cover-side output shaft that is inserted into a cylinder of the output shaft and outputs the driving force of the drive source to the rotating shaft of the toilet cover, and the differential gear mechanism is substantially disc-shaped and has teeth formed on both surfaces. A pinion gear that is rotated by the driving force of the drive source, meshes with teeth formed on one surface of the pinion gear, and meshes with a toilet seat side gear coupled to the toilet seat output shaft; and a tooth formed on the other surface of the pinion gear. And a toilet lid side gear connected to the toilet lid output shaft. This is a preferred embodiment of the present invention.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the driving source comprises a motor, which is a preferred embodiment of the present invention.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 3 is a schematic structural view of the opening and closing device for the toilet seat and the toilet lid. A motor drive device 1 for driving a motor 2 as a drive source, and a toilet seat 4 rotatably supported by a toilet body 6.
And a transmission mechanism 3 for selectively switching and transmitting the driving force of the motor 2 to the rotating shaft of the toilet lid 5. The user operates an operation unit (not shown) or a human body detection sensor (not shown) detects the user. Upon detection, the motor driving device 1 rotates the motor 2, and the torque of the motor 2 is transmitted to the rotating shaft of the toilet seat 4 or the toilet lid 5 via the transmission mechanism 3, and the toilet seat 4 or the toilet lid 5 opens and closes.

FIG. 1 is a sectional view of a main part showing the motor 2 and the transmission mechanism 3. The motor 2 and the transmission mechanism 3 are housed inside a case 8 composed of a body 7a and a cover 7b.

The transmission mechanism 3 comprises a speed reduction mechanism 9 composed of a plurality of gear trains, and a differential gear mechanism 10 for selectively switching and outputting the output of the speed reduction mechanism 9 to the rotation shaft of the toilet seat 4 or the toilet lid 5. You.

The motor 2 is fixed to the case 8 using a motor mounting plate 14, and a pulley 11 is provided on an output shaft of the motor 2. A belt 13 is stretched between the pulley 11 and the pulley 12 having a larger diameter than the pulley 11, and the rotational force of the motor 2 is transmitted to the pulley 12 via the belt 13. The pulley 12 has a first gear G1 concentric with the pulley 12.
Are formed integrally, and the first gear G1 is the first gear G1.
And the second gear G2 having more teeth than the second gear G2. Also,
The second gear G2 is integrally formed with a third gear G3 having a smaller number of teeth than the second gear G2 concentrically with the second gear G2, and the third gear G3 has more teeth than the third gear G3. It is in mesh with the fourth gear G4. Furthermore, 4th gear G4 has 4
5 which has fewer teeth than the 4th gear G4 concentrically with the 4th gear G4
A fifth gear G5 is integrally formed, and the fifth gear G5 meshes with a sixth gear G6 having more teeth than the fifth gear G5. Further, a seventh gear G7 having a smaller number of teeth than the sixth gear G6 is formed integrally with the sixth gear G6 concentrically with the sixth gear G6, and the seventh gear G7 is more integrated than the seventh gear G7. It meshes with the eighth gear G8 having a large number of teeth.

The rotational force of the motor 2 is
The speed is reduced at a predetermined reduction ratio by a speed reduction mechanism 9 including first to eighth gears G1 to G8 and transmitted to a differential gear mechanism 10. Both ends of the shaft 15 of each gear are supported by holes provided in the body 7a and the cover 7b, respectively.

On the other hand, the differential gear mechanism 10
As shown in FIGS. 1 and 2, a substantially cylindrical drive gear 16 that meshes with the eighth gear G8, a substantially disc-shaped drive gear 16 mounted inside the cylinder of the drive gear 16, and an eighth gear G8 on both surfaces.
Gear 1 having teeth 17a, 17b concentric with the pinion gear 1
7, a pinion shaft 18 inserted into holes 16a and 17c respectively penetrating the drive gear 16 and the pinion gear 17 in the radial direction to couple the drive gear 16 and the pinion gear 17, and a pinion gear 17 which is substantially cylindrical and has one end face. A tooth 19a meshing with the teeth 17a is formed, and a toilet seat side gear 19 having a recess 19b having a substantially circular cross section formed on the other end face, and a tooth 17b of the pinion gear 17 having a substantially cylindrical shape and having one end face. Meshing teeth 20a
And the toilet lid side gear 20 on which the toilet seat side is formed.
Note that the toilet seat side gear 19 and the toilet lid side gear 20
The spring 26,
27 are formed, and the toilet seat side gear 19 and the toilet lid side gear 20 are provided with springs 2.
It is supported in the case 8 via the inner and outer surfaces 6 and 27.

Here, the recess 19 of the toilet seat side gear 19
A substantially cylindrical toilet seat side output shaft 21 is fitted to b. Also, the toilet seat side gear 19 and the toilet lid side gear 20
Holes 19c and 20b are formed at substantially the center of the shaft to penetrate the toilet lid side output shaft 22 having a substantially cylindrical shape and both ends having a small diameter through the inside of the cylinder of the toilet seat side output shaft 21. After being inserted into the holes 19c, 20b of both side gears 19, 20, the toilet lid side gear 20 and the toilet lid output shaft 22 are connected by the pin 23. Thus, the rotational force of the motor 2 transmitted via the speed reduction mechanism 9 is
Via the pinion gear 17, the toilet seat side gear 19 or the toilet lid side gear 20, the output is selectively switched to the lighter output shaft of the toilet seat output shaft 21 or the toilet lid output shaft 22.

The operation of the differential gear mechanism 10 will be described below.

First, the case where the toilet lid 5 is electrically opened from the state where both the toilet seat 4 and the toilet lid 5 are closed (see FIG. 4A) will be described. When the motor driving device 1 drives the motor 2 and the rotational force of the motor 2 is transmitted to the drive gear 16 via the speed reduction mechanism 9 and the drive gear 16 rotates counterclockwise as viewed from the side A in FIG. 16 is mounted on a pinion gear 17 via a pinion shaft 18.
Rotates counterclockwise when viewed from the side A in FIG. At this time, the toilet seat 4 and the toilet lid 5 are both closed, and the load on the toilet lid-side output shaft 22 is lighter than the load on the toilet seat-side output shaft 21, so that the rotational force of the pinion gear 17 is It is transmitted only to the toilet lid side output shaft 22 via the lid side gear 20, and is not transmitted to the toilet seat side gear 19. Therefore, only the toilet lid side output shaft 22 rotates counterclockwise when viewed from the A side in FIG. 2, and a state where only the toilet lid 5 is opened (see FIG. 4B).

Next, a state where only the toilet lid 5 is opened (FIG. 4)
(B) The case where the toilet seat 4 is electrically opened from (1) will be described. The motor driving device 1 drives the motor 2 and the motor 2
Is transmitted to the drive gear 16 via the speed reduction mechanism 9, and when the drive gear 16 rotates counterclockwise as viewed from the side A in FIG.
2 rotates counterclockwise when viewed from the A side in FIG. At this time, the toilet lid 5 is open, and the toilet lid side output shaft 22 cannot rotate further counterclockwise when viewed from the A side in FIG. The load is lighter. Therefore, the rotational force of the pinion gear 17 is transmitted to the toilet seat side output shaft 2 via the toilet seat side gear 19 meshing with the pinion gear 17.
1, only the toilet seat side output shaft 21 rotates counterclockwise when viewed from the A side in FIG. 2, and the toilet seat 4 and the toilet lid 5 are both opened. ｛Figure 4
(C) Refer to｝.

The state in which the toilet seat 4 and the toilet lid 5 are both opened {FIG.
(C) The case where the toilet seat 4 is electrically closed from (1) will be described. When the motor driving device 1 drives the motor 2, the rotational force of the motor 2 is transmitted to the drive gear 16 via the reduction mechanism 9, and the drive gear 16 rotates clockwise as viewed from the side A in FIG. Pinion shaft 1 at 16
2 is a pinion gear 17 mounted via A
Turn clockwise as seen from the side. Here, since the toilet seat 4 must be closed together with the toilet lid 5 in order to close the toilet lid 5, the load on the toilet lid side output shaft 22 is heavier than the toilet seat side output shaft 21. Therefore, the rotational force of the pinion gear 17 is transmitted only to the toilet seat side output shaft 21 via the toilet seat side gear 19 that meshes with the pinion gear 17, and is not transmitted to the toilet lid side gear 20. Therefore, only the toilet seat side output shaft 21 rotates clockwise as viewed from the A side in FIG. 2, and the toilet seat 4 is closed and the toilet lid 5 is opened (see FIG. 4B).

A state in which the toilet seat 4 is closed and the toilet lid 5 is opened {FIG.
(B) The case where the toilet lid 5 is electrically closed from (1) will be described. When the motor driving device 1 drives the motor 2 and the rotational force of the motor 2 is transmitted to the drive gear 16 via the speed reduction mechanism 9 and the drive gear 16 rotates clockwise as viewed from the side A in FIG. Pinion shaft 1 at 16
2 is a pinion gear 17 mounted via A
Turn clockwise as seen from the side. At this time, the toilet seat 4 is closed, and the toilet seat-side output shaft 21 cannot rotate clockwise any further when viewed from the A side in FIG. The load is light. Therefore, the rotational force of the pinion gear 17 is transmitted to the toilet lid side output shaft 2 via the toilet lid side gear 20 meshing with the pinion gear 17.
2 and is not transmitted to the toilet seat side side gear 19. Accordingly, only the toilet lid-side output shaft 22 rotates clockwise as viewed from the A side in FIG. 2, and the toilet seat 4 and the toilet lid 5 are both closed (see FIG. 4A).

On the other hand, a case where the toilet lid 5 is manually opened will be described below. If the user attempts to lift the toilet lid 5 by hand from the state where the toilet seat 4 and the toilet lid 5 are closed, the toilet lid side output shaft 22 is turned counterclockwise as viewed from the A side in FIG. The rotational force is transmitted to the pinion gear 1 via the toilet lid side gear 20.
7 is transmitted. Here, the pinion gear 17 meshes with the toilet seat side gear 19, and a force acts to press the toilet seat 4 against the toilet body 6 via the toilet seat side gear 19 and the toilet seat output shaft 21, so that the toilet seat side gear 19 rotates. Therefore, the drive gear 16 rotates and the force for rotating the toilet lid side output shaft 22 is transmitted to the motor 2 via the speed reduction mechanism 9.

A case where the toilet seat 4 is manually opened with the toilet lid 5 opened will be described below. When the toilet seat 4 is lifted by hand from the state where the toilet lid 5 is opened, the toilet seat side output shaft 21 is turned counterclockwise as viewed from the A side in FIG. 2, and the rotational force of the toilet seat side output shaft 21 is reduced by the toilet seat side gear. 19 to the pinion gear 17. At this time, the pinion gear 17
Is engaged with the toilet lid side gear 20 via the toilet lid side gear 20 and the toilet lid output shaft 22. As shown in FIG. Toilet lid 5
Has rotated 90 degrees or more from the closed state,
Because the load applied to the pinion gear 17 from the toilet lid side gear 19 is large when it is raised to about 0 degrees, the toilet lid side gear 20 does not rotate, the drive gear 16 rotates, and the force for rotating the toilet seat rotation shaft 21 is The power is transmitted to the motor 2 via the speed reduction mechanism 9.

A case where both the toilet seat 4 and the toilet lid 5 are manually opened will be described below. When the toilet seat 4 and the toilet lid 5 are both lifted by hand from the state in which both the toilet seat 4 and the toilet lid 5 are closed, the toilet seat-side output shaft 21 and the toilet lid-side output shaft 22 rotate counterclockwise when viewed from the A side in FIG. Turned to Therefore, the rotational force of the toilet seat side output shaft 21 and the toilet lid side output shaft 22 is transmitted to the pinion gear 17 via the toilet seat side gear 19 and the toilet lid side gear 20, respectively, and the motor 2 is driven via the drive gear 16 and the reduction mechanism 9. Is transmitted to In addition, toilet seat 4,
The operation for manually closing the toilet lid 5 is the same as the operation for opening the toilet lid 5, and a description thereof will be omitted.

As described above, in this embodiment, the differential gear mechanism 10 is used as the transmission mechanism 3 for transmitting the rotational force of the motor 2 to the toilet seat-side output shaft 21 or the toilet lid-side output shaft 22. Toilet seat side output shaft 2
Since the rotational force of the motor 2 is transmitted by selectively switching to the output shaft having the smaller load among the output shaft 1 and the toilet lid side output shaft 22, the toilet seat side output shaft 21 and the toilet lid side output shaft 22 are opened and closed. Only one drive source is required, and there is no need to separately provide a transmission mechanism for transmitting the driving force of the drive source to the toilet seat side output shaft 21 and the toilet lid side output shaft 22, thereby reducing the number of parts. In addition, the cost can be reduced, and the installation space for parts can be reduced.

Further, the output shafts 21 and 22 on the toilet seat side or on the toilet lid side are switched and meshed with the gears transmitting the rotational force of the motor 2, so that the motor 2 is driven on the output shafts 21 and 22 on the toilet seat or toilet lid side. In the case where the force is switched and transmitted, there is a risk that poor meshing may occur when the meshing of the gears is switched, and that a tooth skipping sound may occur when the gears are meshed or disengaged. However, in the differential gear mechanism 10, the driving force is switched and transmitted to the toilet seat side or toilet lid side output shafts 21 and 22 in a state where the pinion gear 17 and the toilet seat side and toilet lid side gears 19 and 20 are always meshed. As a result, there is no risk of occurrence of poor meshing or occurrence of tooth skipping noise, and the operation is stabilized.

[0028]

As described above, according to the first aspect of the present invention, the toilet seat and the toilet lid rotatably supported by the toilet body and the driving force of the drive source are transmitted to the rotary shaft of the toilet seat and the toilet lid. A transmission mechanism, wherein the transmission mechanism includes a differential gear mechanism that selectively transmits the driving force of the driving source to the rotating shaft of the toilet seat and the rotating shaft of the toilet lid, and the differential mechanism controls the driving force of the driving source. Since it is selectively transmitted to the toilet seat or toilet lid,
There is no need to separately provide a transmission mechanism for transmitting the driving force of the drive source to the toilet seat and the toilet lid, so that the number of parts can be reduced, the cost can be reduced, and the installation space for the parts can be reduced. There is. In addition, since the gears of the differential gear mechanism are always meshed, when the meshing of the gears is switched as in the case of switching and transmitting the driving force to the rotating shaft of the toilet seat or the toilet lid by switching the meshing of the gears. Therefore, there is an effect that stable operation can be achieved without occurrence of poor meshing or tooth skipping noise.

According to a second aspect of the present invention, in the differential gear mechanism, the driving force of the drive source is transmitted to an output shaft on the lighter side of the output shaft on the toilet seat side or the toilet lid side. Since power is transmitted to either the side output shaft or the toilet lid side output shaft, there is an effect that the toilet seat and the toilet lid can be individually opened and closed.

The invention according to claim 3 is characterized in that the differential gear mechanism selectively switches and transmits the driving force of one drive source to the rotating shaft on the toilet seat side or the toilet lid side. In addition to the above effects, only one drive source is required to drive the toilet seat and the toilet lid, so that the number of components can be reduced, the cost can be reduced, and the installation space for components can be reduced.

According to a fourth aspect of the present invention, there is provided a toilet seat side output shaft which is substantially cylindrical and outputs a driving force of a drive source to a rotary shaft of the toilet seat,
A toilet cover-side output shaft that is substantially cylindrical and is inserted into the toilet seat-side output shaft cylinder and outputs the driving force of the drive source to the rotation shaft of the toilet cover, and the differential gear mechanism is substantially disk-shaped. A pinion gear having teeth formed on both surfaces thereof and rotated by the driving force of the drive source; a toilet seat side gear coupled to a toilet seat output shaft while meshing with teeth formed on one surface of the pinion gear; and a pinion gear having the other side. This is a desirable embodiment of the present invention, characterized by comprising a toilet lid side gear that is meshed with teeth formed on the surface and is coupled to the toilet lid output shaft.

A fifth aspect of the present invention is a preferred embodiment of the present invention, characterized in that the driving source comprises a motor.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a toilet seat and toilet lid opening / closing device according to an embodiment.

FIG. 2 is an enlarged sectional view of a main part showing the differential mechanism of the same.

FIG. 3 is a schematic configuration diagram of the above.

4 (a) to 4 (c) are explanatory views illustrating the open / closed state of the toilet seat and toilet lid according to the first embodiment.

[Explanation of symbols]

 Reference Signs List 2 motor 3 transmission mechanism 9 reduction mechanism 10 differential gear mechanism 12 pulley 16 drive gear 17 pinion gear 18 pinion shaft 19 toilet seat side gear 20 toilet lid side gear 21 toilet lid output shaft 22 toilet lid output shaft G1 to G8 Nos. 1 to 8 No. gear

Claims (5)

[Claims] A toilet seat and a toilet lid rotatably supported by the toilet body; and a transmission mechanism for transmitting a driving force of a driving source to a rotation shaft of the toilet seat and the toilet lid. A toilet seat opening / closing device, comprising: a differential gear mechanism for selectively transmitting the driving force to the rotating shaft of the toilet seat and the rotating shaft of the toilet lid. 2. The toilet seat according to claim 1, wherein the differential gear mechanism transmits a driving force of a driving source to a rotating shaft having a lighter load among the rotating shafts on the toilet seat side or on the toilet lid side. Toilet lid opening and closing device. 3. The toilet seat and the toilet lid according to claim 1, wherein the differential gear mechanism selectively switches and transmits the driving force of one drive source to a rotary shaft on a toilet seat side or a toilet lid side. Switchgear. 4. A toilet seat side output shaft which is substantially cylindrical and transmits a driving force of a drive source to a toilet seat side rotation shaft, and a substantially columnar toilet shaft which is inserted into a cylinder of the toilet seat side output shaft. A toilet cover side output shaft that transmits the driving force of the driving source to the rotating shaft of the differential gear mechanism, wherein the differential gear mechanism has a substantially disc-like shape and has teeth formed on both sides, and a pinion gear that rotates by the driving force of the driving source; ,
A toilet seat side gear meshed with teeth formed on one surface of the pinion gear and coupled to the toilet seat output shaft, and meshed with teeth formed on the other surface of the pinion gear and coupled to the toilet lid output shaft. The toilet seat and toilet lid opening / closing device according to claim 1, comprising a toilet lid side gear. 5. The opening / closing device for a toilet seat and a toilet lid according to claim 1, wherein the driving source comprises a motor.