Water spraying device

Abstract

A water injection device capable of smoothly discharging internal water even when switching from a water injection state to a water stop state is provided with: a main body section (3) provided with an injection port (4) and internal flow paths (31, 32, 33) connected to the injection port (4); a water supply rod (7) provided with a water supply valve body that closes the water supply port by coming into contact with the water supply valve seat and opens the water supply port by being separated from the water supply valve seat; the operation rod (5) enables the water supply port to be in an open state and a closed state by moving the water supply rod (7); an air flow path which is provided between the operating lever (5) and the main body section (3) and which connects the internal flow path and the outside at a position away from the injection port (4); and an O-ring (12) and a groove portion (51) that constitute a sealing mechanism that closes the air flow path when the water supply port is in the open state and opens at least a portion of the air flow path when the water supply port is in the closed state.

Description

Technical Field

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

[0002] As a water injection device, there is known a device described in Patent Document 1 below. In the gun of the spray gun described in Patent Document 1 below, a water stop seal ring and a water stop disk are provided at the lower part of the gun. In a state where the water stop seal ring abuts against the water stop disk, water does not flow into the interior, and when the water stop seal ring moves away from the water stop disk, water flows into the interior and is ejected from a plurality of small holes provided in a deformation disk.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2015-29989 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] In Patent Document 1, since the water stop seal ring and the water stop disk are provided at the lowermost part of the gun, when the water stop seal ring abuts against the water stop disk, water does not flow into the interior. For example, even when placed outside in winter or the like, water does not freeze inside.

[0008] However, even when the water injection state is changed to the state where the water stop seal ring abuts against the water stop disk to stop the water supply, actually, water remains inside. This is because, in order to increase the momentum of the ejected water, the opening area of the small holes provided in the deformation disk is set very small, and thus the surface tension of the small holes prevents the water from flowing out to the outside.

[0009] An object of the present disclosure is to smoothly discharge the water inside even when changing from the water spraying state to the water stop state.

[0010] Technical Solution for Solving the Problem

[0011] The present disclosure provides a water injection device including: 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 path for supplying pressurized water to the internal flow path; a water supply rod provided with a water supply valve body, the water supply valve body closing the water supply port by abutting against a water supply valve seat provided on the main body portion and opening the water supply port by separating from the water supply valve seat; an operation rod for opening and closing the water supply port by moving the water supply rod; an air flow path provided between the operation rod and the main body portion, connecting the internal flow path and the outside at a position far from the jet port; and a sealing mechanism for closing the air flow path when the water supply port is in an open state and opening at least a part of the air flow path when the water supply port is in a closed state.

[0012] Advantages of the Invention

[0013] According to the present disclosure, even when switching from the water jetting state to the water stop state, the water inside can be smoothly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of the water jetting device of the present embodiment;

[0015] Figure 2 is a cross-sectional view of the water jetting device of the present embodiment;

[0016] Figure 3 is an enlarged Figure 1 partial cross-sectional view;

[0017] Figure 4 is an enlarged Figure 2 partial cross-sectional view;

[0018] Figure 5 is a schematic diagram for explaining the sealing mechanism in the present embodiment;

[0019] Figure 6 is a schematic diagram for explaining the sealing mechanism of a modified example.

[0020] DESCRIPTION OF REFERENCE NUMERALS

[0021] 2: water jetting device;

[0022] 3: main body part;

[0023] 31: first internal flow path;

[0024] 32: second internal flow path;

[0025] 33: third internal flow path;

[0026] 34: water supply valve seat;

[0027] 35, 35A: holding part;

[0028] 351, 351A: inner surface;

[0029] 352A: groove part;

[0030] 4: jet orifice;

[0031] 5, 5A: operating rod;

[0032] 51: groove part;

[0033] 52, 52A: outer surface;

[0034] 53A: annular groove;

[0035] 6: operating handle

[0036] 61: Rotating shaft;

[0037] 62: Connecting part;

[0038] 7: Water supply rod;

[0039] 71: Water supply valve body;

[0040] 72: Water supply cam;

[0041] 8: Operating cam;

[0042] 81: First sliding surface;

[0043] 82: Second sliding surface;

[0044] 9: Operating spring;

[0045] 10: Water supply spring;

[0046] 11: Water supply port;

[0047] 12, 12A: O-ring;

[0048] 13: Stopper;

[0049] 131: Inner surface;

[0050] R: Air flow path. Detailed implementation mode

[0051] Hereinafter, this implementation mode will be described with reference to the accompanying drawings. For ease of understanding, the same reference numerals are used to label the same elements in the respective drawings as much as possible, and repeated descriptions are omitted.

[0052] Combined with Figure 1 and Figure 2 , the water injection device 2 of this implementation mode will be described. Figure 1 is a sectional view of the water injection device 2 and shows the state during water injection. Figure 2 is a sectional view of the water injection device 2 and shows the state when no water is injected.

[0053] 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 the two are configured to form an angle of about 100° to 110°. Therefore, the internal flow path formed by the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33 bends at the connection portion of the second internal flow path 32 and the third internal flow path 33.

[0054] A water supply port 11 is provided on the main body portion 3. A hose forming an external water passage is connected to the water supply port 11. The hose is configured to be connected to a faucet of a water pipe, for example, to supply pressurized water.

[0055] The water supplied to the water supply port 11 flows into the third internal flow path 33. The water flowing into the third internal flow path 33 then flows into the second internal flow path 32. The water flowing into the second internal flow path 32 then flows into the first internal flow path 31.

[0056] An ejection port 4 is provided on the main body portion 3. The ejection port 4 is the end of the first internal flow path 31 and is provided on the side opposite to the second internal flow path 32. The ejection port 4 is composed of a plurality of small holes. When pressurized water is supplied from the third internal flow path 33 through the second internal flow path 32 to the first internal flow path 31, the water is ejected from the ejection port 4.

[0057] A water supply rod 7 and a water supply spring 10 are provided on the third internal flow path 33. The water supply rod 7 is arranged along the length 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 side of the water supply port 11. 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 force in such a way that the water supply rod 7 faces the second internal flow path 32.

[0058] An operation rod 5 is provided on the second internal flow path 32. The operation rod 5 is arranged along the same straight line where the first internal flow path 31 and the second internal flow path 32 are provided. An operation spring 9 is provided on one end side of the operation rod 5 on the side of the first internal flow path 31. The operation spring 9 applies a force in such a way that the operation rod 5 faces the first internal flow path 31 side. The other end of the operation rod 5 on the side opposite to the first internal flow path 31 side protrudes to the outside of the main body portion 3.

[0059] An operation handle 6 is provided outside the main body portion 3. The operation handle 6 is arranged along the third internal flow path 33. The operation handle 6 is configured to rotate around a rotation axis 61. A connection portion 62 is provided on the operation handle 6. The other end of the operation rod 5 protruding from the main body portion 3 is installed on the connection portion 62.

[0060] As Figure 1 shown, when the operation handle 6 and the main body portion 3 are held together and the operation handle 6 is operated closer to the main body portion 3, the operation handle 6 rotates clockwise around the rotation axis 61. The operation rod 5 connected to the connection portion 62 moves in such a way that it is pulled out from the second internal flow path 32.

[0061] As Figure 2 shown, when the force applied to the operation handle 6 is removed, the operation rod 5 is pulled back towards the first internal flow path 31 due to the force applied to the operation rod 5 by the operation spring 9.

[0062] The operating lever 5 is provided with an operating cam 8. The operating cam 8 is configured to be interlocked with the operating lever 5 in the second internal flow path 32. 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 configured to be connected to each other. The first sliding surface 81 is provided on the side of the first internal flow path 31, and the second sliding surface 82 is provided on the other end side of the operating lever 5.

[0063] 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. When the water supply cam 72 moves from one end side of the operating lever 5 toward the other end side, it tilts in a manner approaching the operating lever 5.

[0064] As Figure 2 shown, in a state where no force is applied to the operating handle 6, no force is applied to the operating lever 5 to pull it out from the operating handle 6. The operating lever 5 is pulled into the side of the first internal flow path 31 by the acting force applied by the operating spring 9. The operating cam 8 also moves toward the side of the first internal flow path 31 as the operating lever 5 moves. 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 lever 7 provided with the water supply cam 72 is applied with an acting force toward the second internal flow path 32 by the water supply spring 10, and thus 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 lever 7 abuts against the water supply valve seat 34 provided on the main body portion 3, so that the water supply port 11 is in a closed state.

[0065] As Figure 1 shown, when a force is applied to the operating handle 6 to bring it into a state close to the main body portion 3, the operating handle 6 causes the operating lever 5 to move away from the side of the first internal flow path 31. The operating cam 8 also moves away from the side of the first internal flow path 31 as the operating lever 5 moves. As a result, the water supply cam 72 first abuts against the second sliding surface 82 and then against the first sliding surface 81. Thus, the water supply cam 72 is pushed in a manner 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 lever 7 is separated from the water supply valve seat 34 provided on the main body portion 3, so that the water supply port 11 is in an open state.

[0066] When changing from Figure 2 the water shut-off state shown to Figure 1 the jet state shown, and then to Figure 2In the water-stopping state shown, the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33 are in a state filled with water. Even if the water jetting device 2 is tilted so that the jetting port 4 faces vertically downward, since the jetting port 4 is composed of a plurality of small holes, the surface tension also acts, resulting in a state where the water remaining inside cannot be smoothly discharged. To discharge the water remaining inside, for example, it can be considered to remove the component provided with the jetting port 4 from the main body portion 3, but this operation is cumbersome for the user who uses the water jetting device 2. Additionally, for example, it can also be considered to open an opening different from the jetting port 4 at a certain position in the first internal flow path 31, the second internal flow path 32, and the third internal flow path 33, but in Figure 1 the jetting state shown, water will leak out from this opening, and the basic function of the water jetting device 2 will be affected.

[0067] Therefore, in the present embodiment, by designing the sealing mechanism between the main body portion 3 and the operating rod 5, in the jetting state, water will not leak from anywhere other than the jetting port 4, and in the water-stopping state, water will not remain inside. In combination with Figure 3 and Figure 4 this sealing mechanism will be described. Figure 3 For Figure 1 is an enlarged sectional view of the sealing mechanism part in Figure 4 For Figure 2 is an enlarged sectional view of the sealing mechanism part in

[0068] The operating rod 5 passes through the holding portion 35, and the holding portion 35 is 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 and held on the holding portion 35 side by a stopper 13.

[0069] A groove portion 51 is provided on the operating rod 5. In Figure 3 the jetting state shown, the groove portion 51 is located at a position more outside than the O-ring 12. In Figure 4 the water-stopping state shown, the groove portion 51 is located at a position corresponding to the O-ring 12. The sealing mechanism of the present embodiment is composed of the groove portion 51 and the O-ring 12.

[0070] In combination with Figure 5 the sealing mechanism composed of the groove portion 51 and the O-ring 12 will be described. Figure 5 In (A) of Figure 5 is a schematic diagram for explaining the sealing mechanism in the jetting state.

[0071] As shown in Figure 5As shown in (A) therein, in the spraying state, the operating rod 5 is pulled out, and the groove portion 51 is located at a position more outward than the O-ring 12. The O-ring 12 is configured to be fixed by the holding portion 35 and the stopper 13 and cannot move from the position Pa.

[0072] The operating rod 5 includes a cylindrical portion provided with a cylindrical outer surface 52. The holding portion 35, as 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 peripheral diameters of the inner surface 351 and the inner surface 131 are configured to be larger than the outer peripheral diameter of the outer surface 52.

[0073] In Figure 5 the spraying state shown in (A) therein, the O-ring 12 is configured to be in contact with the entire circumference of the outer surface 52 of the operating rod 5, and the water flowing through the second internal flow path 32 will not leak to the outside.

[0074] The operating rod 5 moves in the arrow direction in the figure, from Figure 5 the spraying state shown in (A) therein to Figure 5 the water-stop state shown in (B) therein. As described above, the O-ring 12 is configured to be unable to move from the position Pa. On the other hand, as the operating rod 5 moves, the groove portion 51 moves from the position PbA in the spraying state to PbB in the water-stop state.

[0075] In Figure 5 the water-stop state shown in (B) therein, at least a part of the groove portion 51 is in a state adjacent to the O-ring 12. The groove portion 51 is formed to retreat from the outer surface 52. Therefore, the O-ring 12 and the groove portion 51 are in a non-contact state.

[0076] A gap is formed between the outer surface of the operating rod 5 and the inner surface 351 of the holding portion 35 and the inner surface 131 of the stopper 13 due to the above-mentioned diameter difference. An air flow path R is formed through this gap and the gap between the O-ring 12 and the groove portion 51.

[0077] In Figure 5 the water-stop state shown in (B) therein, at least a part of the air flow path R is in an open state, the second internal flow path 32 is connected to the outside, and the air can enter. In Figure 5 the spraying state shown in (A) therein, the air flow path R is in a closed state, the second internal flow path 32 is not connected to the outside, and neither water nor air can enter or exit.

[0078] Thus, when water is ejected from the ejection port 4, since the O-ring 12 and the groove portion 51 as the sealing mechanism are in a state of closing the air flow path R, water does not leak from the air flow path R. On the other hand, when water is not ejected, the O-ring 12 and the groove portion 51 as the sealing mechanism open at least a part of the air flow path R. For example, when the ejection port 4 faces downward, the air flow path R located at a position higher than the ejection port 4 is open to the atmosphere. Based on the height difference between the ejection port 4 and the air flow path R, the water pressure at the position of the ejection port 4 is higher than the atmospheric pressure and exceeds the surface tension, so that the water remaining in the internal flow path can be quickly discharged.

[0079] Combination Figure 5 The described sealing mechanism forms a closed 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 on the operating rod 5 in the moving direction of the operating rod 5. If the relative positional relationship between the O-ring and other close-contact parts and the groove portion changes, the sealing mechanism can also be formed by fixing the O-ring to the operating rod side and providing the groove portion on the main body portion side.

[0080] Combination Figure 6 A modified example of the sealing mechanism will be described. Figure 6 in (A) and Figure 6 in (B) are schematic diagrams for explaining a modified example in which the O-ring 12A is fixed to the operating rod 5A side and the groove portion 352A is provided on the holding portion 35A as the main body portion side. Figure 6 in (A) is a schematic diagram for explaining a modified example of the sealing mechanism in the ejection state. Figure 6 in (B) is a schematic diagram for explaining a modified example of the sealing mechanism in the water-stopping state.

[0081] As Figure 6 shown in (A) in, in the ejection state, the operating rod 5A is pulled out, and the O-ring 12A is located at a position more outside than the groove portion 352A. The O-ring 12A is fixed by being embedded in a groove formed on the operating rod 5A. In the ejection state, the O-ring 12A is located at the position PaA. The groove portion 352A is provided and fixed on the holding portion 35A so that it does not move from the position Pb.

[0082] The operating rod 5A includes a cylindrical portion provided with a cylindrical outer surface 52A. The holding portion 35A, as a part of the main body portion 3, includes an outer cylindrical portion provided with an inner surface 351A, and the inner surface 351A has a shape along the outer surface 52A. The inner peripheral diameter of the inner surface 351A is configured to be larger than the outer peripheral diameter of the outer surface 52A.

[0083] In Figure 6In the spraying state shown in (A) therein, the O-ring 12A is configured to be in contact with the entire circumference of the outer surface 52A of the operating rod 5A, and the water flowing through the second internal flow path 32 does not leak to the outside.

[0084] The operating rod 5A moves in the direction of the arrow in the figure, from Figure 6 the spraying state shown in (A) therein to Figure 6 the water stop state shown in (B) therein. As described above, the groove portion 352A is configured not to move from the position Pb. On the other hand, as the operating rod 5A moves, the O-ring 12A moves from the position PaA in the spraying state to PaB in the water stop state.

[0085] In Figure 6 the water stop state shown in (B) therein, at least a part of the groove portion 352A is in a state close to the O-ring 12A. The groove portion 352A is formed to retreat from the inner surface 351A. Therefore, the O-ring 12A and the groove portion 352A are in a non-contact state.

[0086] A gap is formed between the outer surface 52A of the operating rod 5A and the inner surface 351A of the holding portion 35A due to the above-mentioned diameter difference. An air flow path R is formed through this gap and the gap between the O-ring 12A and the groove portion 352A.

[0087] In Figure 6 the water stop state shown in (B) therein, 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 can enter. In Figure 6 the spraying state shown in (A) therein, the air flow path R is in a closed state, the second internal flow path 32 is not connected to the outside, and neither water nor air can enter or exit.

[0088] Similar to the embodiment described in conjunction with Figure 5 When water is sprayed from the spray port 4, since the O-ring 12A and the groove portion 352A as the sealing mechanism are in a state of closing the air flow path R, water does not leak from the air flow path R. On the other hand, when water is not sprayed, the O-ring 12A and the groove portion 352A as the sealing mechanism open at least a part of the air flow path R, and have the same effect as the embodiment described in conjunction with Figure 5 described.

[0089] [Note] As long as there is no technical contradiction, the following Notes 1 to 8 can be combined arbitrarily.

[0090] [Note 1]

[0091] A water spraying device 2 includes:

[0092] A main body portion 3, which is provided with a jet port 4 for jetting water to the outside, an internal flow path (a first internal flow path 31, a second internal flow path 32, a third internal flow path 33) connected to the jet port 4, and a water supply port 11 connected to an external water path for supplying pressurized water to the internal flow path;

[0093] A water supply rod 7, which is provided with a water supply valve body 71. The water supply valve body 71 makes the water supply port 11 in a closed state by abutting against a water supply valve seat 34 provided on the main body portion 3, and makes the water supply port 11 in an open state by separating from the water supply valve seat 34;

[0094] Operating rods 5, 5A, which make the water supply port 11 in an open state and a closed state by moving the water supply rod 7;

[0095] An air flow path R, which is provided between the operating rods 5, 5A and the main body portion 3 and connects the internal flow path (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33) and the outside at a position far from the jet port 4; and

[0096] A sealing mechanism, which 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.

[0097] According to Note 1, when the water supply port 11 is in an open state and water is jetted from the jet port 4, since the sealing mechanism seals the air flow path R, water will not leak from the air flow path R. On the other hand, when the water supply port 11 is in a closed state, the supply of water from the water supply port 11 to the internal flow path (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33) stops, so that although water will not be jetted from the jet port 4, the water remains in the internal flow path (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33). When the internal flow path (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33) is in a closed state except for the path connected to the jet port 4, due to the small opening area of the jet port 4, surface tension will act, making it difficult to discharge the water remaining in the internal flow path (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33) even when the jet port 4 faces downward. Therefore, when the water supply port 11 is in a closed state, the sealing mechanism opens at least a part of the air flow path R, so that when the jet port 4 faces downward, the air flow path R located at a position higher than the jet port 4 is open to the atmosphere. Based on the height difference between the jet port 4 and the air flow path R, the water pressure at the position of the jet port 4 is higher than the atmospheric pressure and exceeds the surface tension, so that the water remaining in the internal flow path (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33) can be quickly discharged.

[0098] [Note 2]

[0099] The water injection device 2 according to Note 1, wherein the sealing mechanism is configured to have:

[0100] O-rings 12, 12A as close-contact parts, provided between the main body part 3 and the operating rods 5, 5A, contacting and fixed to either the main body part 3 or the operating rods 5, 5A, and also contacting the other; and

[0101] Groove parts 51, 352A, provided on the other of the main body part 3 or the operating rods 5, 5A where the O-rings 12, 12A as close-contact parts are not fixed, and having portions that do not contact the O-rings 12, 12A as close-contact parts,

[0102] wherein the relative positional relationship between the O-rings 12, 12A as close-contact parts and the groove parts 51, 352A changes according to the change in the relative positional relationship between the main body part 3 and the operating rods 5, 5A.

[0103] Since the O-rings 12, 12A as close-contact parts are provided between the main body part 3 and the operating rods 5, 5A, contacting and fixed to either the main body part 3 or the operating rods 5, 5A, and also contacting the other, the space between the main body part 3 and the operating rods 5, 5A can be sealed. Since the groove parts 51, 352A are provided on the other of the main body part 3 or the operating rods 5, 5A where the O-rings 12, 12A as close-contact parts are not fixed, and have portions that do not contact the O-rings 12, 12A as close-contact parts, the space between the main body part 3 and the operating rods 5, 5A is not sealed at the portions where the groove parts 51, 352A are provided. Since the relative positional relationship between the O-rings 12, 12A as close-contact parts and the groove parts 51, 352A is configured to change according to the change in the relative positional relationship between the main body part 3 and the operating rods 5, 5A, a closed state and an open state can be formed between the main body part 3 and the operating rods 5, 5A.

[0104] [Note 3]

[0105] The water injection device 2 according to Note 2, wherein when the water supply port 11 is in the closed state, the O-rings 12, 12A as close-contact parts are located at positions corresponding to the groove parts 51, 352A and open at least a part of the air flow path R, and when the water supply port 11 is in the open state, the O-rings 12, 12A as close-contact parts are located at positions not corresponding to the groove parts 51, 352A and seal the air flow path R.

[0106] According to Note 3, when the water supply port 11 is in the closed state, since the O-ring 12, 12A as the close contact part is located at the position corresponding to the groove parts 51, 352A and opens at least a part of the air flow path R, the open state of the air flow path R can be surely achieved by using the change in the positional relationship between the main body part 3 and the operation levers 5, 5A. On the other hand, when the water supply port 11 is in the open state, since the O-ring 12, 12A as the close contact part is located at the position not corresponding to the groove parts 51, 352A and closes the air flow path R, the closed state of the air flow path R can be surely achieved by using the change in the positional relationship between the main body part 3 and the operation levers 5, 5A.

[0107] [Note 4]

[0108] The water injection device 2 according to any one of Notes 1 to 3, wherein the internal flow paths (the first internal flow path 31, the second internal flow path 32, the third internal flow path 33) are bent, and the air flow path R is provided in a manner of communicating with the outside of the main body part 3 corresponding to the bent part of the internal flow path.

[0109] In the above embodiment, the air flow path is bent at the connection part between the second internal flow path 32 and the third internal flow path 33. Since the air flow path R is provided corresponding to the bent part of the internal flow path, when the water supply port 11 is in the closed state and the injection port 4 faces downward, the distance between the injection port 4 and the air flow path R can be sufficiently ensured, and the water can be surely discharged. In the above embodiment, the air flow path R is provided at the end of the second internal flow path 32, so that the distance between the injection port 4 and the air flow path R is the sum of the total lengths of the first internal flow path 31 and the second internal flow path 32.

[0110] [Note 5]

[0111] The water injection device 2 according to Note 2 or 3, wherein the O-ring 12 as the close contact part is fixed to the main body part 3, and the groove part 51 is formed on the operation lever 5.

[0112] In Note 5, since the groove part 51 is formed on the operation lever 5, the groove part 51 is provided on the outside of the operation lever 5, which is convenient for the molding or processing of the groove part 51.

[0113] [Note 6]

[0114] The water injection device 2 according to any one of Notes 1 to 5, wherein the operation levers 5, 5A are configured to be able to move the water supply rod 7 by advancing and retreating along the length direction of the operation levers 5, 5A, and have an inner cylinder part provided with a cylindrical outer surface 52, 52A.

[0115] The main body portion 3 has an outer cylinder portion provided with inner surfaces 351, 131, 351A, and the inner surfaces 351, 131, 351A have a shape along the outer surfaces 52, 52A.

[0116] The inner peripheral diameters of the inner surfaces 351, 131, 351A are larger than the outer peripheral diameters of the outer surfaces 52, 52A, and an air flow path R is formed between the outer surfaces 52, 52A and the inner surfaces 351, 131, 351A.

[0117] According to Note 6, by making the inner peripheral diameters of the inner surfaces 351, 131, 351A larger than the outer peripheral diameters 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, there is no need to separately provide a flow path as the air flow path, and the air flow path can be simply formed by the diameter difference.

[0118] [Note 7]

[0119] According to the water injection device 2 described in any one of Notes 1 to 6, further comprising an operating handle 6 for moving the operating rods 5, 5A.

[0120] The operating handle 6 is configured to keep the water supply port 11 closed in the non-operating state and to open the water supply port 11 when the operating handle 6 is operated.

[0121] According to Note 7, since the operating handle 6 keeps the water supply port 11 closed in the non-operating state, the air flow path R is open when the operating handle 6 is not operated. Just place the injection port 4 downward and let it stand still, and the water remaining in the internal flow path can be discharged.

[0122] [Note 8]

[0123] According to the water injection device 2 described in any one of Notes 1 to 7, 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 length direction of the water supply rod 7.

[0124] Operating cams 8 and a water supply cam 72 as transmission mechanisms are provided on the operating rod 5 and the water supply rod 7 to convert the advancing and retreating movement of the operating rod 5 into the advancing and retreating movement of the water supply rod 7.

[0125] The liquid ejected by the water ejection device is mainly water, but is not limited to pure water. For example, it can be used to eject an aqueous solution mixed with certain components. The water supply source can be a water pipe or a water supply device capable of pressurized water supply. The close contact part can be an O-ring as in this embodiment, or can be a component integrally formed with the main body and having flexibility to achieve a sealing function. The operating rod and the holding part can also be not cylindrical as in this embodiment, but polygons that do not affect the sealing through the close contact part. The groove part is not limited to being substantially rectangular and provided only at one place as in this embodiment, and can be provided at multiple places, or can be provided on the entire circumference of the outer peripheral surface of the operating rod or the inner peripheral surface of the holding part. If the shape of the groove part is a shape capable of forming an air flow path, it is not limited to being substantially rectangular, and can also be a shape such as an ellipse.

[0126] As described above, this embodiment has been described with specific examples. However, the present disclosure is not limited to these specific examples. As long as the features of the present disclosure are possessed, the appropriate designs and changes made by those of ordinary skill in the art to these specific examples are also included in the scope of the present disclosure. The respective elements, their configurations, conditions, shapes, etc. possessed by the above-mentioned respective specific examples are not limited to the listed examples, and can also be appropriately changed. As long as there are no technical contradictions among the respective elements possessed by the above-mentioned respective specific examples, their combinations can be appropriately changed.

Claims

1. A water jetting device, characterized in that: include: The main body is 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 path for supplying pressurized water to the internal flow path; A water supply rod is provided with a water supply valve body, wherein the water supply valve body closes the water supply port by abutting against 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, which opens and closes the water supply port by moving the water supply rod; an air flow path, provided between the operating rod and the main body, connecting the internal flow path and the outside at a position away from the injection port; as well as The sealing mechanism closes the air flow path when the water supply port is in an open state, and opens at least a portion of the air flow path when the water supply port is in a closed state.

2. The water jetting device according to claim 1, characterized in that: The sealing mechanism is configured to have: a close contact portion, provided between the main body and the operating rod, in contact with and fixed to either the main body or the operating rod, and also in contact with the other; and a groove portion provided on the other of the main body portion or the operating rod to which the close contact portion is not fixed, and having a portion not in contact with the close contact portion; The relative positional relationship between the close contact portion and the groove portion changes according to the change in the relative positional relationship between the main body portion and the operating rod.

3. The water jetting device according to claim 2, characterized in that: When the water supply port is in a closed state, the sealing portion is located at a position corresponding to the groove portion and opens at least a portion of the air flow path, and when the water supply port is in an open state, the sealing portion is located at a position not corresponding to the groove portion and closes the air flow path.

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

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

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

7. The water jetting device according to any one of claims 1 to 3, characterized in that: Also includes an operating handle for moving the operating rod, The operating handle is configured to close the water supply port in a non-operating state, and to open the water supply port when the operating handle is operated.

8. The water jetting device according to any one of claims 1 to 3, characterized in that: The water supply rod is configured to move the water supply valve body relative to the water supply valve seat by moving forward and backward along the length direction of the water supply rod. The operating rod and the water supply rod are provided with a transmission mechanism to convert the forward and backward movement of the operating rod into the forward and backward movement of the water supply rod.

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