Water jetting device

Abstract

To smoothly discharge internal water even when transitioning from a water jetting state to a shut-off state.SOLUTION: A water jetting device includes: a body part 3 which is provided with a jetting port 4 and internal flow paths 31, 32, 33 connected to the jetting port 4; a water supply rod 7 which is provided with a water supply valve body that turns a water supply port into a close state when in contact with a water supply valve seat, and turns the water supply port into an open state when separated from the water supply valve seat; an operation rod 5 which moves the water supply rod 7 to switch the water supply port between the open state and the close state; an air flow path which is provided between the operation rod 5 and the body part 3, and connects the internal flow path to the outside at a position apart from the jetting port 4; and an O-ring 12 and a groove part 51 which constitute a sealing mechanism that seals the air flow path when the water supply port is turned into the open state, and opens at least a portion of the air flow path when the water supply port is turned into the close state.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a water injection device.

Background Art

[0002] As a water injection device, one described in Patent Document 1 below is known. In the spray gun described in Patent Document 1 below, a water stop seal ring and a water stop plate are provided at the lower part of the gun. When the water stop seal ring is in contact with the water stop plate, water does not flow into the inside. When the water stop seal ring separates from the water stop plate, water flows into the inside, and water is sprayed from a number of small holes provided in the variation plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, since the water stop seal ring and the water stop plate are provided at the lowermost part of the gun, when the water stop seal ring and the water stop plate are in contact, water does not flow into the inside. For example, even if it is left outside in winter, it is said that water does not freeze inside.

[0005] However, even if the water stop seal ring and the water stop plate are brought into contact with each other after the water has been sprayed to stop the water supply, in reality, water will remain inside. This is because the opening area of the small holes provided in the variation plate is set extremely small in order to increase the momentum of the sprayed water, and thus the surface tension of the small holes inhibits the water from flowing out to the outside.

[0006] An object of the present disclosure is to smoothly discharge the internal water even when transitioning from a state of spraying water to a state of stopping water.

Means for Solving the Problems

[0007] The present disclosure relates to a water injection device, which includes a main body provided with an injection port for injecting water to the outside, an internal flow path connected to the injection port, and a water supply port connected to an external water channel for supplying pressurized water to the internal flow path; a water supply rod provided with a water supply valve body that closes the water supply port by contacting a water supply valve seat provided on the main body and opens the water supply port by separating from the water supply valve seat; an operating rod that moves the water supply rod to open and close the water supply port; an air flow path provided between the operating rod and the main body and connecting the internal flow path to the outside at a position away from the injection port; and a sealing mechanism that seals the air flow path when the water supply port is in an open state and opens at least a part of the air flow path when the water supply port is in a closed state.

Advantages of the Invention

[0008] According to the present disclosure, even when transitioning from a state of injecting water to a state of stopping water injection, the internal water can be smoothly discharged.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0010] Hereinafter, this embodiment will be described with reference to the accompanying drawings. For ease of understanding the description, the same reference numerals are given to the same components in each drawing as much as possible, and duplicate descriptions are omitted.

[0011] With reference to FIGS. 1 and 2, the water injection device 2 according to this embodiment will be described. FIG. 1 is a cross-sectional view of the water injection device 2 showing the case where water is injected. FIG. 2 is a cross-sectional view of the water injection device 2 showing the case where water is not injected.

[0012] The water injection device 2 includes a main body portion 3. Inside the main body portion 3, a first internal flow path 31, a second internal flow path 32, and a third internal flow path 33 are provided. The first internal flow path 31 and the second internal flow path 32 are connected and arranged on the same straight line. The second internal flow path 32 and the third internal flow path 33 are connected and arranged so as to form an angle of about 100° to 110°. Therefore, the internal flow path composed of the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33 is bent at the connection portion between the second internal flow path 32 and the third internal flow path 33.

[0013] The main body portion 3 is provided with a water supply port 11. A hose forming an external water channel is connected to the water supply port 11. The hose is connected to, for example, a faucet of a water supply and is configured to supply pressurized water.

[0014] The water supplied to the water supply port 11 flows into the third internal flow path 33. The water that has flowed into the third internal flow path 33 flows into the second internal flow path 32. The water that has flowed into the second internal flow path 32 flows into the first internal flow path 31.

[0015] The main body portion 3 is provided with an injection port 4. The injection port 4 is provided at the end of the first internal flow path 31 on the side opposite to the second internal flow path 32. The injection port 4 is composed of a number of small holes. When the water pressurized in the first internal flow path 31 is supplied from the third internal flow path 33 via the second internal flow path 32, water is injected from the injection port 4.

[0016] The third internal flow path 33 is provided with a water supply rod 7 and a water supply spring 10. The water supply rod 7 is provided along the longitudinal direction of the third internal flow path 33. A water supply valve body 71 is provided at one end of the water supply rod 7 on the water supply port 11 side. A water supply cam 72 is provided at the other end of the water supply rod 7 on the side of the second internal flow path 32. The water supply spring 10 applies a biasing force so that the water supply rod 7 faces the second internal flow path 32.

[0017] The second internal flow path 32 is provided with an operating rod 5. The operating rod 5 is provided along the same straight line on which the first internal flow path 31 and the second internal flow path 32 are arranged. An operating spring 9 is arranged at one end side of the operating rod 5 on the first internal flow path 31 side. The operating spring 9 applies a biasing force so that the operating rod 5 faces the first internal flow path 31. The other end of the operating rod 5 on the side opposite to the first internal flow path 31 side is provided so as to protrude outside the main body portion 3.

[0018] An operating lever 6 is provided outside the main body portion 3. The operating lever 6 is arranged along the third internal flow path 33. The operating lever 6 is configured to rotate around a rotation shaft 61. A connecting portion 62 is provided on the operating lever 6. The other end of the operating rod 5 protruding from the main body portion 3 is attached to the connecting portion 62.

[0019] As shown in FIG. 1, when the operating lever 6 is grasped together with the main body portion 3 and the operating lever 6 is operated so as to approach the main body portion 3, the operating lever 6 rotates clockwise around the rotation shaft 61. As a result, the operating rod 5 connected to the connecting portion 62 moves so as to be pulled out from the second internal flow path 32.

[0020] As shown in FIG. 2, when the force applied to the operating lever 6 is removed, the operating rod 5 is pulled back toward the first internal flow path 31 by the biasing force applied to the operating rod 5 by the operating spring 9.

[0021] The operating lever 5 is provided with an operating cam 8. The operating cam 8 is provided in the second internal flow path 32 so as to be interlocked with the operating lever 5. The operating cam 8 is formed with a first sliding surface 81 and a second sliding surface 82. The first sliding surface 81 and the second sliding surface 82 are provided so as to be continuous. The first sliding surface 81 is provided on the first internal flow path 31 side, and the second sliding surface 82 is provided on the other end side of the operating lever 5.

[0022] The first sliding surface 81 and the second sliding surface 82 are configured to abut against the water supply cam 72 as the operating lever 5 moves. The water supply cam 72 is inclined so as to approach the operating lever 5 from one end side to the other end side of the operating lever 5.

[0023] As shown in FIG. 2, when no force is applied to the operating lever 6, the force pulling the operating lever 5 from the operating lever 6 is not applied. The operating lever 5 is pulled into the first internal flow path 31 side by the biasing force applied from the operating spring 9. In response to the movement of the operating lever 5, the operating cam 8 also moves to the first internal flow path 31 side. As a result, the water supply cam 72 is in a state of not abutting against the first sliding surface 81 and the second sliding surface 82. The water supply rod 7 provided with the water supply cam 72 is biased by the water supply spring 10 so as to move toward the second internal flow path 32 and moves toward the second internal flow path 32. The water supply valve body 71 provided on the water supply port 11 side of the water supply rod 7 abuts against the water supply valve seat 34 provided on the main body portion 3, and closes the water supply port 11.

[0024] As shown in FIG. 1, when a force is applied to the operating lever 6 and the operating lever 6 is brought close to the main body portion 3, the operating lever 5 moves away from the first internal flow path 31 by the operating lever 6. In response to the movement of the operating lever 5, the operating cam 8 also moves away from the first internal flow path 31. As a result, the water supply cam 72 first abuts against the second sliding surface 82 and then abuts against the first sliding surface 81. As a result, the water supply cam 72 is pushed in so as to move away from the second internal flow path 32. The water supply valve body 71 provided on the water supply port 11 side of the water supply rod 7 is separated from the water supply valve seat 34 provided on the main body portion 3, and opens the water supply port 11.

[0025] From the water-stopping state shown in Fig. 2, it is changed to the jet state shown in Fig. 1, and then back to the water-stopping state shown in Fig. 2. In this case, the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33 are filled with water. Even if the water injection device 2 is tilted so that the injection port 4 faces vertically downward, since the injection port 4 is composed of a large number of small holes, surface tension acts, and the water staying inside is not smoothly discharged. To discharge the water staying inside, for example, it is conceivable to remove the member provided with the injection port 4 from the main body portion 3, but this would be a troublesome operation for the user who uses the water injection device 2. Also, for example, it is conceivable to provide an opening different from the injection port 4 somewhere in the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33. However, in the case of the jet state shown in Fig. 1, water would leak out from that opening, and the basic function of the water injection device 2 would be impaired.

[0026] Therefore, in this embodiment, by devising the sealing mechanism between the main body portion 3 and the operating rod 5, it is ensured that water does not leak out from anywhere other than the injection port 4 in the jet state, and water does not stay inside in the water-stopping state. This sealing mechanism will be described with reference to Figs. 3 and 4. Fig. 3 is an enlarged cross-sectional view of the sealing mechanism portion of Fig. 1. Fig. 4 is an enlarged cross-sectional view of the sealing mechanism portion of Fig. 2.

[0027] The operating rod 5 passes through a holding portion 35 located at the end of the second internal flow path 32 on the side opposite to the first internal flow path 31. The holding portion 35 is a part of the main body portion 3. An O-ring 12 is provided on the second internal flow path 32 side of the holding portion 35. The O-ring 12 is pressed against and held on the holding portion 35 side by a stopper 13.

[0028] The operating rod 5 is provided with a groove portion 51. The groove portion 51 is located outside the O-ring 12 in the jet state shown in Fig. 3. The groove portion 51 is located at a position corresponding to the O-ring 12 in the water-stopping state shown in Fig. 4. The groove portion 51 and the O-ring 12 constitute the sealing mechanism of this embodiment.

[0029] With reference to Fig. 5, an explanation will be given of the sealing mechanism constituted by the groove portion 51 and the O-ring 12. Fig. 5(A) is a conceptual diagram for explaining the sealing mechanism in the injection state. Fig. 5(B) is a conceptual diagram for explaining the sealing mechanism in the water-stopping state.

[0030] As shown in Fig. 5(A), in the injection state, the operating rod 5 is pulled out and the groove portion 51 is located outside the O-ring 12. The O-ring 12 is fixed by the holding portion 35 and the stopper 13 and is configured not to move from the position Pa.

[0031] The operating rod 5 includes a cylindrical portion provided with a cylindrical outer surface 52. The holding portion 35, which is a part of the main body portion 3, includes an outer cylindrical portion provided with an inner surface 351 having a shape along the outer surface 52. The stopper 13 includes an outer cylindrical portion provided with an inner surface 131 having a shape along the outer surface 52. The inner diameters of the inner surface 351 and the inner surface 131 are configured to be larger than the outer diameter of the outer surface 52.

[0032] In the injection state shown in Fig. 5(A), the O-ring 12 is in contact with the entire circumference of the outer surface 52 of the operating rod 5, and is configured such that the water flowing through the second internal flow path 32 does not leak to the outside.

[0033] The operating rod 5 moves in the direction of the arrow in the figure from the injection state shown in Fig. 5(A) to the water-stopping state shown in Fig. 5(B). As described above, the O-ring 12 is configured not to move from the position Pa. On the other hand, the groove portion 51 moves from the position PbA in the injection state to PbB in the water-stopping state as the operating rod 5 moves.

[0034] In the water-stopping state shown in Fig. 5(B), at least a part of the groove portion 51 abuts on the O-ring 12. The groove portion 51 is formed so as to retreat from the outer surface 52. Therefore, the O-ring 12 and the groove portion 51 are not in contact with each other.

[0035] A gap due to the above-described difference in diameter is formed between the outer surface of the operating lever 5, the inner surface 351 of the holding portion 35, and the inner surface 131 of the stopper 13. An air flow path R is formed by this gap and the gap between the O-ring 12 and the groove portion 51.

[0036] In the water-stopping state shown in FIG. 5(B), at least a part of the air flow path R is in an open state, and the second internal flow path 32 is connected to the outside and air enters. In the injection state shown in FIG. 5(A), the air flow path R is in a sealed state, and the second internal flow path 32 is not connected to the outside, and neither water nor air enters or exits.

[0037] When water is injected from the injection port 4 in this way, the O-ring 12 and the groove portion 51, which are the sealing mechanisms, seal the air flow path R, so that water does not leak from the air flow path R. On the other hand, when water is not injected, the O-ring 12 and the groove portion 51, which are the sealing mechanisms, open at least a part of the air flow path R. For example, when the injection port 4 is facing down, the air flow path R located above the injection port 4 is open to the atmosphere. The water pressure at the position of the injection port 4 becomes higher than the atmospheric pressure according to the difference in height between the injection port 4 and the air flow path R, and the water remaining in the internal flow path can be quickly discharged by exceeding the surface tension.

[0038] The sealing mechanism described with reference to FIG. 5 forms a sealed state and an open state of the air flow path R by fixing the O-ring 12 to the main body portion 3 side and moving the position of the groove portion 51 provided in the operating lever 5 in the moving direction of the operating lever 5. If the relative positional relationship between the close contact portion such as the O-ring and the groove portion changes, the sealing mechanism can also be formed by fixing the O-ring to the operating lever side and providing the groove portion on the main body portion side.

[0039] A modified example of the sealing mechanism will be described with reference to FIG. 6. FIGS. 6(A) and 6(B) are conceptual diagrams for explaining a modified example in which the O-ring 12A is fixed to the operating lever 5A side and the groove portion 352A is provided on the holding portion 35A which is the main body portion side. FIG. 6(A) is a conceptual diagram for explaining a modified example of the sealing mechanism in the injection state. FIG. 6(B) is a conceptual diagram for explaining a modified example of the sealing mechanism in the water-stopping state.

[0040] As shown in Fig. 6(A), in the injection state, the operating rod 5A is pulled out and the O-ring 12A is positioned outside the groove portion 352A. The O-ring 12A is fixed by being fitted into a groove formed in the operating rod 5A. The O-ring 12A is positioned at position PaA in the injection state. The groove portion 352A is provided in the holding portion 35A and is fixed so as not to move from position Pb.

[0041] The operating rod 5A includes a cylindrical portion provided with a cylindrical outer surface 52A. The holding portion 35A, which is a part of the main body portion 3, includes an outer cylinder portion provided with an inner surface 351A having a shape along the outer surface 52A. The inner diameter of the inner surface 351A is configured to be larger than the outer diameter of the outer surface 52A.

[0042] In the injection state shown in Fig. 6(A), the O-ring 12A is in contact with the entire circumference of the outer surface 52A of the operating rod 5A, and is configured so that the water flowing through the second internal flow path 32 does not leak to the outside.

[0043] The operating rod 5A moves in the direction of the arrow in the figure from the injection state shown in Fig. 6(A) to the water stop state shown in Fig. 6(B). As described above, the groove portion 352A is configured so as not to move from position Pb. On the other hand, the O-ring 12A moves from position PaA in the injection state to PaB in the water stop state as the operating rod 5A moves.

[0044] In the water stop state shown in Fig. 6(B), at least a part of the groove portion 352A abuts on the O-ring 12A. The groove portion 352A is formed so as to retreat from the inner surface 351A. Therefore, the O-ring 12A and the groove portion 352A are not in contact with each other.

[0045] A gap due to the above-described difference in diameter is formed between the outer surface 52A of the operating rod 5A and the inner surface 351A of the holding portion 35A. An air flow path R is formed by this gap and the gap between the O-ring 12A and the groove portion 352A.

[0046] In the water-stop state shown in FIG. 6(B), at least a part of the air flow path R is in an open state, and the second internal flow path 32 is connected to the outside, allowing air to enter. In the injection state shown in FIG. 6(A), the air flow path R is in a sealed state, and the second internal flow path 32 is not connected to the outside, preventing both water and air from entering or leaving.

[0047] Similar to the embodiment described with reference to FIG. 5, when water is injected from the injection port 4, the O-ring 12A and the groove portion 352A, which are sealing mechanisms, seal the air flow path R, so that water does not leak from the air flow path R. On the other hand, when water is not injected, the O-ring 12A and the groove portion 352A, which are sealing mechanisms, open at least a part of the air flow path R, achieving the same operational effects as the embodiment described with reference to FIG. 5.

[0048] [Appendix] The following Appendices 1 to 8 can be arbitrarily combined as long as there is no technical contradiction.

[0049] [Appendix 1] A main body portion 3 provided with an injection port 4 for injecting water to the outside, internal flow paths (first internal flow path 31, second internal flow path 32, third internal flow path 33) connected to the injection port 4, and a water supply port 11 connected to an external water channel for supplying pressurized water to the internal flow paths, A water supply rod 7 provided with a water supply valve body 71 that closes the water supply port 11 by contacting a water supply valve seat 34 provided on the main body portion 3 and opens the water supply port 11 by separating from the water supply valve seat 34, An operating rod 5, 5A for moving the water supply rod 7 to open and close the water supply port 11, An air flow path R provided between the operating rod 5, 5A and the main body portion 3, connecting the internal flow paths (first internal flow path 31, second internal flow path 32, third internal flow path 33) and the outside at a position away from the injection port 4, A water injection device 2 comprising a sealing mechanism that seals the air flow path R when the water supply port 11 is in an open state and opens at least a part of the air flow path R when the water supply port 11 is in a closed state.

[0050] According to Supplementary Note 1, when the water supply port 11 is in the open state and water is ejected from the ejection port 4, the sealing mechanism seals the air flow path R, so water does not leak from the air flow path R. On the other hand, when the water supply port 11 is in the closed state, the supply of water from the water supply port 11 to the internal flow paths (the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33) stops, and water is no longer ejected from the ejection port 4, but water remains in the internal flow paths (the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33). If the internal flow paths (the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33) are in a blocked state except for the path connected to the ejection port 4, since the opening area of the ejection port 4 is small, surface tension acts, and it is difficult to discharge the water remaining in the internal flow paths (the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33) even when the ejection port 4 is directed downward. Therefore, when the water supply port 11 is in the closed state, the sealing mechanism opens at least a part of the air flow path R, so that when the ejection port 4 is directed downward, the air flow path R located above the ejection port 4 is opened to the atmosphere. The water pressure at the position of the ejection port 4 becomes higher than the atmospheric pressure according to the height difference between the ejection port 4 and the air flow path R, and the water remaining in the internal flow paths (the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33) can be quickly discharged exceeding the surface tension.

[0051] [Supplementary Note 2] The sealing mechanism is provided between the main body portion 3 and the operating rods 5, 5A, and includes O-rings 12, 12A as close contact portions that contact and are fixed to one of the main body portion 3 or the operating rods 5, 5A and also contact the other, a groove portion 51, 352A provided on the other of the main body portion 3 or the operating rods 5, 5A where the O-rings 12, 12A as close contact portions are not fixed, and having a portion that does not contact the O-rings 12, 12A as close contact portions, The water injection device 2 according to Supplementary Note 1, configured such that the relative positional relationship between the O-rings 12, 12A as close contact portions and the groove portion 51, 352A changes as the relative positional relationship between the main body portion 3 and the operating rods 5, 5A changes.

[0052] The O-rings 12, 12A as the close contact parts are provided between the main body part 3 and the operating levers 5, 5A, contact and are fixed to one of the main body part 3 or the operating levers 5, 5A and also contact the other, so that the space between the main body part 3 and the operating levers 5, 5A can be sealed. The groove parts 51, 352A are provided on the other part where the O-rings 12, 12A as the close contact parts are not fixed and have parts that do not contact the O-rings 12, 12A as the close contact parts. Therefore, in the part where the groove parts 51, 352A are provided, the space between the main body part 3 and the operating levers 5, 5A is not sealed. As the relative positional relationship between the main body part 3 and the operating levers 5, 5A changes, the relative positional relationship between the O-rings 12, 12A as the close contact parts and the groove parts 51, 352A is configured to change. Therefore, a sealed state and an open state between the main body part 3 and the operating levers 5, 5A can be formed.

[0053] [Appendix 3] The water injection device 2 according to Appendix 2, wherein when the water supply port 11 is in a closed state, the O-rings 12, 12A as the close contact parts are located at positions corresponding to the groove parts 51, 352A to open at least a part of the air flow path R, and when the water supply port 11 is in an open state, the O-rings 12, 12A as the close contact parts are located at positions not corresponding to the groove parts 51, 352A to seal the air flow path R.

[0054] According to Appendix 3, when the water supply port 11 is in a closed state, the O-rings 12, 12A as the close contact parts are located at positions corresponding to the groove parts 51, 352A to open at least a part of the air flow path R. Therefore, by utilizing the change in the positional relationship between the main body part 3 and the operating levers 5, 5A, the open state of the air flow path R can be surely realized. On the other hand, when the water supply port 11 is in an open state, the O-rings 12, 12A as the close contact parts are located at positions not corresponding to the groove parts 51, 352A to seal the air flow path R. Therefore, by utilizing the change in the positional relationship between the main body part 3 and the operating levers 5, 5A, the sealed state of the air flow path R can be surely realized.

[0055] [Appendix 4] The internal flow paths (the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33) are bent, and an air flow path R is provided so as to communicate with the outside of the main body 3 corresponding to the bent portion. The water injection device 2 according to any one of Appendices 1 to 3.

[0056] In the above embodiment, the air flow path is bent at the portion where the second internal flow path 32 and the third internal flow path are connected. Since the air flow path R is provided corresponding to the bent portion of the internal flow path, when the water supply port 11 is in the closed state and the injection port 4 is downward, the distance between the injection port 4 and the air flow path R can be sufficiently ensured, and water drainage can be reliably performed. In the above embodiment, the air flow path R is provided at the end of the second internal flow path 32, and the distance between the injection port 4 and the air flow path R is ensured by the total length of the first internal flow path 31 and the second internal flow path 32.

[0057] [Appendix 5] The O-ring 12 as the close contact portion is fixed to the main body 3, and the groove portion 51 is formed in the operation rod 5. The water injection device 2 according to Appendix 2 or 3.

[0058] In Appendix 5, since the groove portion 51 is formed in the operation rod 5, the groove portion 51 is provided outside the operation rod 5, and the forming or processing of the groove portion 51 becomes easy.

[0059] [Appendix 6] The operation rods 5 and 5A are configured to be able to move the water supply rod 7 by advancing and retreating along the longitudinal direction of the operation rods 5 and 5A, and have an inner cylinder portion provided with a cylindrical outer surface 52 and 52A. The main body 3 has an outer cylinder portion provided with inner surfaces 351, 131, and 351A having a shape along the outer surfaces 52 and 52A. The inner diameters of the inner surfaces 351, 131, and 351A are larger than the outer diameters of the outer surfaces 52 and 52A, and an air flow path R is formed between the outer surfaces 52 and 52A and the inner surfaces 351, 131, and 351A. The water injection device 2 according to any one of Appendices 1 to 5.

[0060] According to Supplementary Note 6, by making the inner diameter of the inner surfaces 351, 131, 351A larger than the outer diameter of the outer surfaces 52, 52A, an air flow path R is formed between the outer surfaces 52, 52A and the inner surfaces 351, 131, 351A. Therefore, the air flow path can be simply formed by the diameter difference without separately providing a flow path as an air flow path.

[0061] [Supplementary Note 7] Furthermore, an operation lever 6 for moving the operation rods 5, 5A is provided. The operation lever 6 is configured to close the water supply port 11 in a non-operated state and open the water supply port 11 when the operation lever 6 is operated. The water injection device 2 according to any one of Supplementary Notes 1 to 6.

[0062] According to Supplementary Note 7, since the operation lever 6 closes the water supply port 11 in a non-operated state, the air flow path R is opened without operating the operation lever 6, and the water accumulated in the internal flow path can be drained simply by providing the injection port 4 downward and leaving it as it is.

[0063] [Supplementary Note 8] The water supply rod 7 is configured to be able to move the water supply valve body 71 relative to the water supply valve seat 34 by advancing and retreating along the longitudinal direction of the water supply rod 7. An operation cam 8 and a water supply cam 72 are provided on the operation rod 5 and the water supply rod 7 as transmission mechanisms for converting the movement of the operation rod 5 advancing and retreating into the movement of the water supply rod 7 advancing and retreating. The water injection device 2 according to any one of Supplementary Notes 1 to 7.

[0064] The liquid sprayed by the water spraying device is mainly water, but it is not limited to pure water. For example, it may be used for spraying an aqueous solution mixed with some components. The water supply source may be a water supply pipe or a water supply device capable of pressurizing and supplying water. The sealing part may be an O-ring as in this embodiment, or for example, it may be integrally formed with the main body, flexible, and capable of realizing a sealing function. The operating rod and the holding part do not have to be cylindrical as in this embodiment, and may be polygonal to such an extent that there is no problem in being sealed by the sealing part. The groove part is not limited to being provided at one place and being substantially rectangular as in this embodiment, and may be provided at a plurality of places, or may be provided over the entire outer peripheral surface of the operating rod or the inner peripheral surface of the holding part. The shape of the groove part is not limited to being substantially rectangular as long as an air flow path can be formed, and may be, for example, an elliptical shape.

[0065] As described above, this embodiment has been described with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those obtained by appropriately making design changes to these specific examples by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-described specific examples and its arrangement, conditions, shape, etc. are not limited to those illustrated and can be appropriately changed. Each element included in each of the above-described specific examples can be appropriately combined as long as no technical contradiction occurs.

Explanation of Reference Numerals

[0066] 2: Water spraying device 3: Main body part 31: First internal flow path 32: Second internal flow path 33: Third internal flow path 34: Water supply valve seat 35, 35A: Holding part 351, 351A: Inner surface 352A: Groove part 4: Spray port 5, 5A: Operating rod 51: Groove part 52, 52A: Outer surface 53A: Ring groove 6: Operating lever 61: Rotation axis 62: Connecting part 7: Water supply rod 71: Water supply valve body 72: Water supply cam 8: Operation cam 81: First sliding surface 82: Second sliding surface 9: Operation spring 10: Water supply spring 11: Water inlet 12, 12A: O-ring 13: Stopper 131: Inner surface R: Air flow path

Claims

1. A main body portion provided with a jet port for jetting water to the outside, an internal flow path connected to the jet port, and a water supply port connected to an external water channel for supplying pressurized water to the internal flow path; A water supply rod provided with a water supply valve body that closes the water supply port by contacting a water supply valve seat provided on the main body portion and opens the water supply port by separating from the water supply valve seat; An operating rod that moves the water supply rod to open and close the water supply port; An air flow path provided between the operating rod and the main body portion, connecting the internal flow path and the outside at a position away from the jet port; A water jetting device comprising: a sealing mechanism that seals the air flow path when the water supply port is in an open state and opens at least a part of the air flow path when the water supply port is in a closed state.

2. The sealing mechanism is A close contact portion provided between the main body portion and the operating rod, contacting and fixed to one of the main body portion or the operating rod and also contacting the other; A groove portion provided in the other of the main body portion or the operating rod where the close contact portion is not fixed, having a portion that does not contact the close contact portion; and having The water jetting device according to claim 1, wherein the relative positional relationship between the close contact portion and the groove portion changes in accordance with a change in the relative positional relationship between the main body portion and the operating rod.

3. When the water supply port is in a closed state, the close contact portion is positioned at a position corresponding to the groove portion to open at least a part of the air flow path, and when the water supply port is in an open state, the close contact portion is positioned at a position not corresponding to the groove portion to seal the air flow path. The water jetting device according to claim 2.

4. The internal flow path is bent, and an air flow path is provided so as to communicate with the outside of the main body portion corresponding to the bent portion. The water jetting device according to any one of claims 1 to 3.

5. The close contact portion is fixed to the main body portion, and the groove portion is formed in the operating rod. The water jetting device according to claim 2 or 3.

6. The operating rod is configured to be able to move the water supply rod by advancing and retreating along the longitudinal direction of the operating rod, and has an inner cylinder portion provided with a cylindrical outer surface. The main body portion has an outer cylinder portion provided with an inner surface having a shape along the outer surface. The water injection device according to any one of claims 1 to 3, wherein the inner peripheral diameter of the inner surface is larger than the outer peripheral diameter of the outer surface, and the air flow path is formed between the outer surface and the inner surface.

7. Furthermore, it includes an operation lever for moving the operation rod, The operation lever is configured to close the water supply port in a non-operated state, and to open the water supply port when the operation lever is operated. The water injection device according to any one of claims 1 to 3.

8. The water supply rod is configured to be able to move the water supply valve body relative to the water supply valve seat by advancing and retreating along the longitudinal direction of the water supply rod, The operation rod and the water supply rod are provided with a transmission mechanism that converts the movement of the operation rod advancing and retreating into the movement of the water supply rod advancing and retreating. The water injection device according to any one of claims 1 to 3.

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