Discharge valve operating device, flush water tank device, and flush toilet

Patent metadata

Field	Value
Publication number	US-10794050-B2
Application number	US-201916267991-A
Country	US
Kind code	B2
Filing date	Feb 5, 2019
Priority date	Feb 15, 2018
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A discharge valve operating device includes an electric operation unit including a rotating shaft, a first coupling member and a second coupling member having respective one ends coupled to a discharge valve, a first rotary winding member, and a second rotary winding member. The first rotary winding member and the second rotary winding member include a first holed portion and a second holed portion, respectively, which are provided near portions at respective rotation centers. Each holed portion is engageable and disengageable with the rotating shaft in a rotation direction in accordance with the rotation direction of the rotating shaft in each operation mode.

First claim

What is claimed is:

1. A discharge valve operating device configured to perform valve opening operation of a discharge valve in a flush water tank device which supplies flush water to a toilet, comprising:
an operation device including a rotating shaft and being operated by first and second operation modes, the operating portion being configured to rotate the rotating shaft in a first direction on the first operation mode and to rotate the rotating shaft in a second direction opposite to the first rotation direction on the second operation mode;
first and second coupling members in which each one end of the first and second coupling members is coupled to the discharge valve;
a first rotary winding member configured to be mounted to the rotating shaft so as to be engageable and disengageable in a rotation direction, an other end of the first coupling member being coupled to the first rotary winding member, the first rotary winding member being configured to wind up the first coupling member when the first rotary winding member rotates together with the rotating shaft in the first rotation direction; and
a second rotary winding member configured to be mounted to the rotating shaft so as to be engageable and disengageable in the rotation direction, an other end of the second coupling member being coupled to the second rotary winding member, the second rotary winding member being configured to wind up the second coupling member when the second rotary winding member rotates together with the rotating shaft in the second rotation direction, independently of the first rotary winding member,
wherein the first rotary winding member and the second rotary winding member respectively include a first holed portion and a second holed portion, which are provided near respective rotation centers, and each of the holed portions is engageable and disengageable with/from the rotating shaft in the rotation direction in accordance with the rotation direction of the rotating shaft in each of the operation modes,
when the rotating shaft is rotated in the first rotation direction in the first operation mode of the operation device,
the first holed portion of the first rotary winding member is configured to rotate in the first rotation direction in a state of being engaged with the rotating shaft in the rotation direction while the second holed portion of the second rotary winding member is configured to be brought out of engagement with the rotating shaft in the rotation direction and enter a stationary state, and
the discharge valve is configured to be pulled up by a first amount when the first coupling member alone is wound up by the first amount by the first rotary winding member, and toilet flushing in a first flush mode is executable when a first flush water amount of flush water is supplied from the flush water tank device to the toilet, and
when the rotating shaft is rotated in the second rotation direction in the second operation mode of the operation device,
the first holed portion of the first rotary winding member is configured to be brought out of engagement with the rotating shaft in the rotation direction and enter a stationary state while the second holed portion of the second rotary winding member is configured to rotate in the second rotation direction in a state of being engaged with the rotating shaft in the rotation direction, and
the discharge valve is configured to be pulled up by a second amount different from the first amount when the second coupling member alone is wound up by the second amount by the second rotary winding member, and toilet flushing in a second flush mode is executable when a second flush water amount different from the first flush water amount of flush water is supplied from the flush water tank device to the toilet.

2. The discharge valve operating device according to claim 1 , wherein
the operation device is an electric operation device which includes an electric rotating shaft coupled to the rotating shaft and capable of electrically rotationally driving the rotating shaft by external power, and
the first rotary winding member and the second rotary winding member are rotatable with rotation radiuses larger than respective rotation radiuses of the electric rotating shaft and the rotating shaft by being rotationally driven by the electric rotating shaft.

3. The discharge valve operating device according to claim 1 , wherein
the operation device is a manual operation device which includes an operation member coupled to the rotating shaft and capable of manually rotationally driving the rotating shaft.

4. The discharge valve operating device according to claim 2 , wherein
the first rotary winding member is rotatable independently with the rotation radius that is almost identical to the rotation radius of the second rotary winding member between an initial position where the discharge valve is closed and is at a lowest position and a first maximum rotation position where the discharge valve is opened and is at a first highest position in the first operation mode of the operation device,
the second rotary winding member is rotatable independently with the rotation radius that is almost identical to the rotation radius of the first rotary winding member between the initial position and a second maximum rotation position where the discharge valve is opened and is at a second highest position different from the first highest position in the second operation mode of the operation device,
a first maximum rotation angle when the first rotary winding member rotates from the initial position to the first maximum rotation position in the first rotation direction is set larger than a second maximum rotation angle when the second rotary winding member rotates from the initial position to the second maximum rotation position in the second rotation direction, and
the first amount, by which the first coupling member alone is wound up by the first rotary winding member, is set larger than the second amount, by which the second coupling member alone is wound up by the second rotary winding member, and the first flush water amount for supply from the flush water tank device to the toilet in the first flush mode is set larger than the second flush water amount for supply from the flush water tank device to the toilet in the second flush mode.

5. The discharge valve operating device according to claim 4 , further comprising
a biasing member which is provided to the first rotary winding member and the second rotary winding member, the biasing member being configured to be capable of biasing the first rotary winding member at the first maximum rotation position and the second rotary winding member at the second maximum rotation position such that the first rotary winding member and the second rotary winding member return to the initial position.

6. The discharge valve operating device according to claim 5 , wherein
the biasing member is a torsion coil spring which is provided on a central axis almost identical to central axes of the first rotary winding member and the second rotary winding member, the torsion coil spring including a first arm portion and a second arm portion extending outward from one end and the other end, respectively, of the torsion coil spring,
the first rotary winding member includes a first arm mounting portion, to which one of the first arm portion and the second arm portion is mounted,
the second rotary winding member includes a second arm mounting portion, to which the other of the first arm portion and the second arm portion is mounted,
the first arm portion of the torsion coil spring is configured to bias the first arm mounting portion of the first rotary winding member at the first maximum rotation position in the second rotation direction and return the fir

Assignees

• Toto Ltd

Inventors

• Shinohara Koki
• Tanimoto Hideki
• Abe Makoto

Classifications

• E03D5/092

  the flushing element, e.g. siphon bell, being actuated through a lever · CPC title

• E03D1/144

  having a single flush outlet and an additional float for delaying the valve closure · CPC title

• E03D9/08

  Devices in the bowl producing upwardly-directed sprays; Modifications of the bowl for use with such devices (showers A47K3/28; bathing devices for special therapeutic or hygienic purposes A61H33/00, for specific parts of the body A61H35/00 ){; Bidets; Combinations of bowls with urinals or bidets; Hot-air or other devices mounted in or on the bowl, urinal or bidet for cleaning or disinfecting} · CPC title

• E03D5/09

  directly by the hand · CPC title

• E03D1/26 Primary

  Bowl with flushing cistern mounted on the rearwardly extending end of the bowl (shape or material of the cistern E03D1/01; constructional features of the bowl E03D11/02 - E03D11/12) · CPC title