Flush bulb

Abstract

The present invention provides a flush valve that can suppress the occurrence of false detections even when the human body detection sensor is covered with a cover member. [Solution] The present invention is a water flush valve (1) comprising: a main body (2); a functional unit (6) that controls the supply and stopping of flushing water to a toilet bowl; a human body detection sensor (12) provided on the front of the functional unit that detects the user of the toilet bowl by irradiating it with electromagnetic waves and detecting the reflected waves; a support member (14) that slidably supports the functional unit with respect to the main body; a cover member (4) that is attached to the main body so as to cover the functional unit and has a transparent window (16) that allows electromagnetic waves irradiated from the human body detection sensor to pass through; and guide parts (18, 20) that slide the functional unit so that the human body detection sensor of the functional unit is positioned at a predetermined position relative to the transparent window of the cover member when the cover member is attached to the main body.

Description

Technical Field

[0001] The present invention relates to a flush valve, and more particularly to a flush valve that supplies and stops washing water to a flush toilet.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2000-248598 (Patent Document 1) describes a fluid control device. This fluid control device is configured by attaching a unit member having a sensor with directivity on the surface to an opening of a flush valve body. And it is configured to control the supply of the washing water supplied from the flush valve body to a urinal based on the reception signal of the sensor. In this fluid control device, the unit member can be fixed in a predetermined direction by engaging a spline provided on the unit member with a spline formed on a base nut attached to the flush valve body. Thereby, while preventing the sensor provided on the unit member from being displaced from an appropriate direction, the burden of the attachment work can be reduced.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the fluid control device described in Patent Document 1, the sensor is directly attached to the surface of the unit member, and by controlling the direction in which the unit member is attached, it was possible to appropriately position the sensor. In contrast, in order to provide a flush valve (fluid control device) with a more aesthetically pleasing design, it may be necessary to have a structure in which the functional part equipped with the sensor is covered with an aesthetically pleasing cover. However, when the sensor is covered with a cover, there is a problem that the detection by the sensor tends to become unstable. That is, the sensor provided in the flush valve is generally configured to irradiate electromagnetic waves such as infrared light and switch the discharge and stop of flush water according to the reception state of the reflected light. When a cover is provided to cover the sensor, a transmissive window is provided in the cover that allows the electromagnetic waves irradiated from the sensor to pass through, and the irradiation and detection of electromagnetic waves are performed through this transmissive window. However, if there is variation in the positional relationship between the transmissive window and the sensor, stray light etc. will occur between the transmissive window and the sensor, and there is a problem that the sensor is prone to false detection.

[0005] Therefore, the present invention aims to provide a flush valve that can suppress the occurrence of false detections even when the human body detection sensor is covered with a cover member. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a flush valve for supplying and stopping flushing water to a toilet bowl, comprising: a main body connected to a water source for flushing water and the toilet bowl; a functional unit for controlling the supply and stopping of flushing water to the toilet bowl; a human body detection sensor provided on the front of the functional unit for detecting the user of the toilet bowl by irradiating it with electromagnetic waves and detecting the reflected waves; a support member for slidably supporting the functional unit with respect to the main body; a cover member attached to the main body so as to cover the functional unit and having a transparent window that allows electromagnetic waves irradiated from the human body detection sensor to pass through; and a guide part for sliding the functional unit so that the human body detection sensor of the functional unit is positioned at a predetermined position relative to the transparent window of the cover member when the cover member is attached to the main body.

[0007] According to the present invention configured in this manner, the functional unit is slidably supported by a support member relative to the main body, and when the cover member is attached to the main body, the guide member slides the functional unit so that the human body detection sensor of the functional unit is positioned in a predetermined position relative to the transparent window of the cover member. As a result, the transparent window can be accurately positioned relative to the human body detection sensor provided on the functional unit.

[0008] In the present invention, preferably, the guide portion is provided on the inside of the cover member so as to contact the functional unit.

[0009] With the present invention configured in this way, since the guide portion is provided on the inside of the cover member, the guide portion can be easily provided without hindering the routing of wiring materials connecting the human body detection sensor and the electrical circuit, and the form of the functional unit can be simplified.

[0010] In the present invention, preferably, the cover member is attached to the main body so as to cover the functional unit from above, and the guide portion is provided on the inside of the cover member and is composed of ribs formed such that at least a portion of it narrows in width from top to bottom.

[0011] According to the present invention configured in this way, the guide portion is provided on the inside of the cover member and is composed of ribs formed so that at least a part of it narrows in width from top to bottom. Therefore, when attaching the cover member to the functional unit from above, the ribs allow the functional unit to slide smoothly and be positioned in a predetermined location. Furthermore, by composing the guide portion with ribs, the durability of the guide portion can be improved compared to cases where the guide portion is composed of springs, etc., and the functional unit can be accurately positioned. Moreover, by composing the guide portion with ribs, the functional unit can be gradually moved to follow the attachment operation of the cover member, making it easier to attach the cover member.

[0012] In the present invention, preferably, the functional unit is configured to be attachable to the main body in reverse, with the front and back reversed.

[0013] According to the present invention configured in this way, since the functional unit can be mounted on the main body in reverse, even if the main body is mounted in reverse depending on the conditions at the construction site, the functional unit can be mounted so that the human body detection sensor faces forward, thereby increasing the versatility of the flush valve.

[0014] In the present invention, preferably, the functional unit is attached to the support member by a snap-fit ​​mechanism, and the vertical movement of the functional unit is restricted.

[0015] With the present invention configured in this way, the functional unit is attached to the support member by a snap-fit ​​mechanism, allowing the functional unit to be easily attached to and detached from the main body. Furthermore, even when vertical force is applied to the functional unit when attaching the cover member, it is possible to prevent the functional unit from shifting vertically.

[0016] In the present invention, preferably, the snap - fit mechanism is composed of protrusions extending in the front - rear direction provided on both side surfaces of the functional unit, and support openings provided in the support member so as to receive these protrusions. The protrusions are configured to be movable in the front - rear direction within the support openings.

[0017] According to the present invention configured as described above, since the snap - fit mechanism is composed of the protrusions and the support openings, and the protrusions are configured to be movable in the front - rear direction within the support openings, when attaching the cover member, even when a vertical force is applied to the functional unit, it is possible to prevent the functional unit from shifting in the vertical direction, and it is possible to secure an adjustment margin in the front - rear direction of the position of the functional unit.

Advantages of the Invention

[0018] According to the flash valve of the present invention, even when the human body detection sensor is covered with the cover member, it is possible to suppress the occurrence of false detection.

Brief Description of the Drawings

[0019] [Figure 1] It is a front view of the flash valve according to an embodiment of the present invention. [Figure 2] It is a perspective view of the flash valve according to an embodiment of the present invention. [Figure 3] It is an exploded perspective view of the flash valve according to an embodiment of the present invention. [Figure 4] It is a side cross - sectional view showing a part of the flash valve according to an embodiment of the present invention broken. [Figure 5] It is a perspective view of the flash valve according to a modified embodiment of the present invention. [[ID=,32]]

Modes for Carrying Out the Invention

[0020] Next, referring to the accompanying drawings, the flash valve according to an embodiment of the present invention will be described. FIG. 1 is a front view of a flush valve according to an embodiment of the present invention. FIG. 2 is a perspective view of the flush valve according to the embodiment of the present invention, showing a state where the cover member is removed. FIG. 3 is an exploded perspective view of the flush valve according to the embodiment of the present invention. FIG. 4 is a side cross-sectional view showing a part of the flush valve according to the embodiment of the present invention with a break.

[0021] As shown in FIG. 1, the flush valve 1 according to the embodiment of the present invention is generally configured in a substantially rectangular parallelepiped shape, and has a main body portion 2 provided at the lower part and a cover member 4 attached to the upper side of the main body portion 2. Further, as shown in FIG. 2, a functional unit 6 is housed inside the cover member 4, and the functional unit 6 covers the cover member 4 from above.

[0022] Also, as shown in FIG. 1, a water supply pipe connection portion 2a connected to a water supply pipe (not shown) such as a water supply for a washing water supply source is provided on one side surface of the main body portion 2, and an outflow pipe connection portion 2b connected to a flush toilet (not shown) to which washing water is to be supplied is provided on the bottom surface of the main body portion 2. The flush valve 1 of the present embodiment is configured to supply and stop the washing water supplied from the water supply source to the flush toilet based on the detection result of a human body detection sensor provided in the functional unit 6. Note that the flush toilet connected to the outflow pipe connection portion 2b may be a flush toilet or a urinal.

[0023] Furthermore, as shown in FIG. 3, inside the main body portion 2, a on-off valve 8 for supplying and stopping the washing water to the flush toilet and a solenoid 10 for operating the on-off valve are incorporated. The solenoid 10 is operated based on a control signal sent from the functional unit 6 and is configured to open and close the on-off valve 8. That is, when the on-off valve 8 is opened by a control signal from the functional unit 6, the tap water flowing in from the water supply pipe connection portion 2a connected to the water supply source is supplied as washing water to the flush toilet from the outflow pipe connection portion 2b. On the other hand, when the on-off valve 8 is closed by a control signal from the functional unit 6, the supply of washing water to the flush toilet is stopped.

[0024] Next, as shown in Figure 2, the functional unit 6 is mounted above the main body 2 and is configured to control the supply and stop of flushing water to the toilet bowl. Specifically, the functional unit 6 has a housing 6a, a control board (not shown) located inside the housing 6a, and a human body detection sensor 12 provided on the lower front of the housing 6a. A sensor signal from the human body detection sensor 12 is input to the control board (not shown), and the control board is configured to output a control signal to the solenoid 10 of the main body 2 based on the sensor signal. In other words, the functional unit 6 and the main body 2 are connected by a cable (not shown) for sending control signals.

[0025] The human body detection sensor 12 is located on the front of the functional unit 6 and is configured to detect the user of the flush toilet by irradiating it with electromagnetic waves and detecting the reflected waves. In this embodiment, an infrared sensor that emits infrared rays and receives reflected waves is used as the human body detection sensor 12. Specifically, a light-emitting element 12a and a light-receiving element 12b are provided on the front of the human body detection sensor 12. Infrared rays are irradiated from the light-emitting element 12a diagonally downward and forward, and the reflected light is received by the light-receiving element 12b. When the light-receiving element 12b receives reflected light at a predetermined intensity or higher, it is determined that a user has approached within the detection range of the sensor. In this embodiment, an infrared sensor is used, but a human body detection sensor that irradiates electromagnetic waves other than infrared rays, such as microwaves, can also be used.

[0026] Furthermore, as shown in Figures 2 and 3, the functional unit 6 is supported above the main body 2 by a pair of support members 14. The support members 14 are formed by bending a metal plate into a predetermined shape. The support members 14 are attached to the upper part of the main body 2 and extend upward from both ends in the width direction of the main body 2. In addition, at the intermediate height of the support members 14, there are receiving portions 14a (Figure 3) formed by bending a metal plate inward. The bottom of the functional unit 6 supported by the support members 14 abuts against these receiving portions 14a. The pair of support members 14 support the functional unit 6 above the main body 2 by sandwiching the functional unit 6 between them above the receiving portions 14a.

[0027] Furthermore, projections 6b extending in the front-to-back direction are provided on both sides of the housing 6a of the functional unit 6 (only one is shown in Figures 2 and 3). On the other hand, support openings 14b extending in the front-to-back direction are provided at the upper ends of each support member 14. The projections 6b on both sides of the functional unit 6 are received by the support openings 14b of each support member 14, thereby fixing the functional unit 6 to each support member 14.

[0028] Specifically, when the functional unit 6 is inserted between the support members 14 attached to the main body 2, the projections 6b on both sides of the functional unit 6 cause the support members 14 to elastically deform so that the distance between them widens. Then, when the functional unit 6 is inserted to a position where its bottom surface abuts against each receiving portion 14a, the projections 6b are received into the support openings 14b, and the elastically deformed support members 14 return to their original shape. In other words, the functional unit 6 is fixed in place by the projections 6b of the functional unit 6 being received into the support openings 14b of each support member 14. In this way, the functional unit 6 is snapped into place on the main body 2 by each support member 14. Therefore, the projections 6b on the functional unit 6 and the support openings 14b on each support member 14 constitute a snap-fit ​​mechanism.

[0029] As shown in Figure 3, each projection 6b is an elongated projection extending in the front-rear direction of the functional unit 6. On the other hand, each support opening 14b is an elongated slot extending in the front-rear direction of the functional unit 6. The width of each projection 6b is approximately the same as the width of each support opening 14b, while the length of each projection 6b is shorter than the length of each support opening 14b. Therefore, each projection 6b can move in the front-rear direction within each support opening 14b, but cannot move substantially in the up-down direction. In this way, the snap-fit ​​mechanism allows the functional unit 6 to slide in the front-rear direction relative to the main body 2, and is supported by each support member 14. On the other hand, the movement of the functional unit 6 in the up-down and left-right directions is restricted by the snap-fit ​​mechanism.

[0030] Furthermore, each projection 6b and each support opening 14b is located in the center of the main body 2 in the front-to-back direction. Therefore, the functional unit 6 can be attached to the main body 2 even if its front-to-back orientation is reversed. That is, in this embodiment, the water supply pipe connection part 2a of the main body 2 is attached to a water supply pipe (not shown) on the right side, and in this state, the functional unit 6 is attached to the main body 2 so that the human body detection sensor 12 faces forward. Conversely, even when the main body 2 is reversed and attached so that it is connected to a water supply pipe (not shown) on the left side, the functional unit 6 can still be attached so that the human body detection sensor 12 faces forward.

[0031] Next, the cover member 4 is a member attached to the upper side of the main body 2 so as to cover the functional unit 6. That is, in this embodiment, the cover member 4 is made up of a box-shaped member with an opening at the bottom. On the front surface of the cover member 4, an oval-shaped transparent window 16 is provided at a position corresponding to the human body detection sensor 12 of the functional unit 6. Electromagnetic waves emitted from the human body detection sensor 12 are irradiated by passing through the transparent window 16. In other words, an opening is provided on the front surface of the cover member 4 at a position corresponding to the human body detection sensor 12, and the transparent window 16 is formed by attaching a thin plate-shaped member to this opening.

[0032] In this embodiment, the transmissive window 16 is made of a material that transmits infrared light. Infrared light emitted from the light-emitting element 12a of the human body detection sensor 12 passes through the transmissive window 16 and is irradiated forward from the flash bulb 1. If this infrared light is reflected by a user or other person near the flash bulb 1, the reflected light (infrared light) passes through the transmissive window 16 and is received by the light-receiving element 12b of the human body detection sensor 12.

[0033] Furthermore, as shown in Figure 4, a first guide portion 18 and a second guide portion 20 are integrally formed with the cover member 4 inside the cover member 4. The first guide portion 18 is a plate-shaped portion provided at the corner between the front surface and the ceiling surface of the cover member 4, and extends in the front-rear direction from the front surface to the rear of the cover member 4. The second guide portion 20 is a plate-shaped portion provided at the corner between the rear surface and the ceiling surface of the cover member 4, and extends in the front-rear direction from the rear surface to the front of the cover member 4. In this embodiment, three of each of the first guide portion 18 and the second guide portion 20 are formed parallel to each other inside the cover member 4 (only one of each is shown in Figure 4).

[0034] Furthermore, the first guide portion 18 is a rib composed of an inclined portion 18a and a parallel portion 18b provided above the inclined portion 18a. The inclined portion 18a is a rib-shaped portion formed so as to narrow in width from top to bottom. The parallel portion 18b is a rib-shaped portion formed with a substantially constant width so as to be continuous with the upper end of the inclined portion 18a.

[0035] Similarly, the second guide portion 20 is a rib composed of an inclined portion 20a and a parallel portion 20b provided above the inclined portion 20a. The inclined portion 20a is a rib-shaped portion formed so as to narrow in width from top to bottom. The parallel portion 20b is a rib-shaped portion formed with a substantially constant width so as to be continuous with the upper end of the inclined portion 20a.

[0036] In this way, by providing the first guide portion 18 and the second guide portion 20 facing each other inside the cover member 4, the functional unit 6 housed inside the cover member 4 can be positioned in a predetermined location. That is, when the cover member 4 is placed over the functional unit 6, which is slidably supported by the support member 14, from above, the inclined portion of the first guide portion 18 or the second guide portion 20 comes into contact with the upper part of the housing 6a of the functional unit 6. As the inclined portion comes into contact, the functional unit 6 is pushed forward or backward by the guide portion and slides in the front-rear direction.

[0037] Then, as shown in Figure 4, when the cover member 4 is placed over the main body 2 until its lower end abuts against it, the housing 6a of the functional unit 6 is positioned by being sandwiched between the parallel portion 18b of the first guide portion 18 and the parallel portion 20b of the second guide portion 20. As a result, the human body detection sensor 12 provided on the functional unit 6 is positioned at a predetermined position relative to the transparent window 16 provided on the cover member 4. In this way, the functional unit 6 is positioned by the first guide portion 18 and the second guide portion 20 provided on the cover member 4. Therefore, the front-to-back position of the human body detection sensor 12 relative to the transparent window 16 of the cover member 4 can be positioned without depending on the mounting position of the functional unit 6 on the main body 2.

[0038] In this embodiment, the human body detection sensor 12 is positioned so that its front end is very close to the back surface of the transmissive window 16, or in contact with the back surface of the transmissive window 16. This significantly reduces stray light generated when infrared light emitted from the human body detection sensor 12 is reflected off the back surface of the transmissive window 16, thereby improving the detection accuracy of the human body detection sensor 12.

[0039] Next, the installation procedure for the flush valve 1 according to an embodiment of the present invention will be described. First, with the cover member 4 attached to the main body 2, a water supply pipe (not shown) is connected to the water supply pipe connection part 2a of the main body 2, and a pipe (not shown) extending from a flush toilet (not shown) is connected to the outlet pipe connection part 2b. Next, the cover member 4 is removed from the main body 2, and if necessary, the functional unit 6 is temporarily removed and inserted between the two support members 14 so that the human body detection sensor 12 faces forward. Then, the functional unit 6 is moved to a position where each projection 6b of the housing 6a of the functional unit 6 is received into the support opening 14b of each support member 14. This snaps the functional unit 6 into place on the main body 2.

[0040] Furthermore, the main body 2 and the functional unit 6 are connected by a signal cable (not shown). In this state, the functional unit 6 is restricted from moving vertically and horizontally relative to the main body 2, but sliding in the front-to-back direction is permitted. Next, the cover member 4 is attached from above the functional unit 6. At this time, the housing 6a of the functional unit 6 and the first guide portion 18 or the second guide portion 20 provided inside the cover member 4 come into contact, and the functional unit 6 slides in the front-to-back direction. With the cover member 4 attached to the main body 2, the functional unit 6 is positioned between the parallel portions of the first guide portion 18 and the second guide portion 20. As a result, the tip of the human body detection sensor 12 provided on the functional unit 6 is positioned near the back surface of the transparent window 16 of the cover member 4.

[0041] According to the flush valve 1 of the embodiment of the present invention, the functional unit 6 is slidably supported by the support member 14 relative to the main body 2, and when the cover member 4 is attached to the main body 2, the first and second guide members 18 and 20 slide the functional unit 6 so that the human body detection sensor 12 of the functional unit 6 is positioned in a predetermined position relative to the transparent window 16 of the cover member 4, thereby enabling the transparent window 16 to be accurately positioned relative to the human body detection sensor 12 provided on the functional unit 6. As a result, even when the human body detection sensor 12 is covered by the cover member 4, the occurrence of false detections by the human body detection sensor 12 can be suppressed.

[0042] Furthermore, according to the flush valve 1 of this embodiment, since the first and second guide portions 18 and 20 are provided inside the cover member 4, the first and second guide portions 18 and 20 can be easily installed without hindering the routing of signal cables (not shown) connecting the human body detection sensor 12 and the electrical circuit (not shown), thereby simplifying the form of the functional unit 6.

[0043] Furthermore, according to the flush valve 1 of this embodiment, the first and second guide portions 18 and 20 are provided on the inside of the cover member 4, and their inclined portions 18a and 20a are made of ribs formed to narrow in width from top to bottom. Therefore, when attaching the cover member 4 to the functional unit 6 from above, the ribs allow the functional unit 6 to slide smoothly and be positioned to a predetermined location. In addition, by making the first and second guide portions 18 and 20 out of ribs, the durability of the guide portion can be improved compared to cases where the guide portion is made out of springs, and the functional unit 6 can be accurately positioned. Furthermore, by making the first and second guide portions 18 and 20 out of ribs, the functional unit 6 can be gradually moved to follow the attachment operation of the cover member 4, making it easier to attach the cover member 4.

[0044] Furthermore, according to the flush valve 1 of this embodiment, the functional unit 6 can be mounted on the main body 2 with its front and back reversed. Therefore, even if the main body 2 is mounted inverted depending on the conditions of the construction site, the functional unit 6 can be mounted so that the human body detection sensor 12 faces forward, thereby increasing the versatility of the flush valve 1.

[0045] Furthermore, according to the flush valve 1 of this embodiment, the functional unit 6 is attached to the support member 14 by a snap-fit ​​mechanism (projection 6b and support opening 14b), so the functional unit 6 can be easily attached to and detached from the main body 2. Also, when attaching the cover member 4, even if vertical force is applied to the functional unit 6, it is possible to prevent the functional unit 6 from shifting vertically.

[0046] Furthermore, according to the flush valve 1 of this embodiment, the snap-fit ​​mechanism is composed of a projection 6b and a support opening 14b, and the projection 6b is configured to be movable in the front-rear direction within the support opening 14b. Therefore, even when an up-and-down force is applied to the functional unit 6 when attaching the cover member 4, it is possible to prevent the functional unit 6 from shifting in the up-and-down direction, and to ensure adjustment range in the front-rear direction of the position of the functional unit 6.

[0047] Although embodiments of the present invention have been described above, various modifications can be made to the embodiments described above. In particular, in the embodiments described above, the first guide portion and the second guide portion were provided facing each other, and the functional unit was positioned between them. In contrast, as a modification, the guide portion can be provided on only one side. In this case, it is preferable to provide a biasing mechanism that biases the functional unit toward the guide portion, so that the functional unit can be reliably brought into contact with the guide portion.

[0048] Furthermore, in the embodiment described above, the functional unit 6 was snapped to the support member 14 by positioning the housing 6a so that the projections 6b could be received in the support opening 14b provided in the support member 14. In contrast, as a modification, as shown in Figure 5, a U-shaped groove 15 (only one shown in Figure 5) with an open top can be provided at the upper end of each support member 14 instead of the support opening 14b. In this modification, the functional unit 6 is positioned so that the projections 6b (only one shown in Figure 5) provided on both sides of the housing 6a are received in the grooves 15 of each support member 14. As a result, each projection 6b of the housing 6a is placed in the respective groove 15, and the functional unit 6 is slidably supported with respect to the main body 2. [Explanation of symbols]

[0049] 1. Flush valve 2 Main body 2a Water supply pipe connection 2b Outlet pipe connection 4 Cover component 6. Functional Unit 6a enclosure 6b Protrusion (snap-fit ​​mechanism) 8. Shut-off valves 10 Solenoid 12 Human body detection sensors 12a Light-emitting element 12b Photodetector 14 Support Member 14a Receiving part 14b Support opening (snap-fit ​​mechanism) 15 groove 16 Transparent window 18. First Guide Section 18a Slope 18b Parallel part 20 Second Guide Section 20a Slope 20b Parallel part

Claims

1. A flush valve that supplies and stops flushing water to a toilet bowl, The main unit is connected to the water supply source for flushing water and the toilet bowl. A functional unit that controls the supply and cessation of flushing water to the toilet bowl, A human body detection sensor is provided on the front of this functional unit, which detects the user of the flush toilet by irradiating it with electromagnetic waves and detecting the reflected waves. A support member that slidably supports the above-mentioned functional unit with respect to the above-mentioned main body, A cover member is attached to the main body so as to cover the functional unit, and has a transparent window that allows electromagnetic waves emitted from the human body detection sensor to pass through. When attaching the cover member to the main body, a guide is provided to slide the functional unit so that the human body detection sensor of the functional unit is positioned in a predetermined position relative to the transparent window of the cover member. A flush valve characterized by having the following features.

2. The flush valve according to claim 1, wherein the guide portion is provided on the inside of the cover member so as to contact the functional unit.

3. The flush valve according to claim 2, wherein the cover member is attached to the main body so as to cover the functional unit from above, and the guide portion is provided on the inside of the cover member and consists of ribs formed such that at least a portion of it narrows in width from top to bottom.

4. The flush valve according to claim 1, wherein the above-mentioned functional unit is configured to be mounted on the above-mentioned main body in reverse.

5. The flush valve according to claim 1, wherein the above-mentioned functional unit is attached to the support member by a snap-fit ​​mechanism, and the vertical movement of the functional unit is restricted.

6. The snap-fit ​​mechanism is comprised of projections extending in the front-rear direction provided on both sides of the functional unit and support openings provided in the support member to receive these projections, and the projections are configured to be movable in the front-rear direction within the support openings, according to claim 5.

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