Watering nozzle

Abstract

To provide a sprinkler nozzle which prevents water leakage when a water discharge shape is switched.SOLUTION: A sprinkler nozzle includes a first case C1 which has a water guide member 1 having water supply ports P1 therein and is provided on an upstream side in a water flow direction, a second case C2 which is connected to a downstream side in the water flow direction of the first case C1, has a plurality of water discharge ports P3 on the end face on the downstream side, and relatively rotates around a shaft core X in a water discharge direction relative to the first case C1, and a water shape switching member 3 which is formed with a plurality of connection ports P2 connected to each of the plurality of water discharge ports P3, has a partition part 3a provided between the first case C1 and the second case C2, and connects one of the plurality of connection ports P2 to the water supply holes P1 by rotating integrally with the second case C2, wherein at least one communication hole H1 in addition to the plurality of connection ports P2 is provided in the partition part 3a, and water leaked to the side of the first case C1 is discharged to the side of the second case C2.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a watering nozzle that can switch water discharge flow paths by rotating a case, thereby allowing selection of multiple water discharge shapes. [Background technology]

[0002] Conventional techniques relating to such watering nozzles include, for example, those disclosed in Patent Document 1 below (see paragraphs

[0016] and

[0019] of the specification, Fig. 2, Figs. 6 to 8, etc.).

[0003] The technology disclosed in Patent Document 1 relates to a sprinkler nozzle in which a sprinkler body 31 having a plurality of water discharge outlets 21 to 26 is rotatably held at the tip of a nozzle body 1, and the water discharge pattern can be selected.

[0004] Water that has flowed through nozzle body 1 flows into sprinkler body 31 from outlets 6a, 6b formed on tip surface 4 of nozzle body 1. Spray outlets 6a, 6b are equipped with gasket 11, which abuts against circular plate portion 41 that forms part of sprinkler body 31. Circular plate portion 41 is formed with multiple water discharge inlets 21a-26a, etc., and depending on the rotational position of sprinkler body 31, specific water discharge inlets 21a-26a are sealed by gasket 11 and communicate with spouts 6a, 6b. In this state, the user's desired water discharge shape can be obtained.

[0005] To change the water discharge shape, the water spray body 31 is rotated to change the water discharge inlets 21a-26a that face the spray outlets 6a, 6b. At that time, the flat surface of the circular plate portion 41 slides against the packing 11, and the water spray body 31 is fixed in position where the selected water discharge inlets 21a-26a are completely surrounded by the packing 11. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-114454 Summary of the Invention [Problem to be solved by the invention]

[0007] The watering nozzle of Patent Document 1 can change its water discharge shape even during watering. However, when water discharge inlets 21a-26a, which had been aligned with packing 11, move, there is a risk of water leakage inside nozzle body 1. Specifically, when sprinkler body 31 is rotated and half of circular water discharge inlets 21a-26a are displaced outside packing 11, some of the water that once seeps into water discharge inlets 21a-26a from outlets 6a, 6b will seep between tip surface 4 of nozzle body 1 and the sliding surface of circular plate portion 41, rather than into water discharge outlets 21-26, and will leak out the side of the watering nozzle.

[0008] As a result, users may mistakenly believe that the nozzle is faulty. Even if users are unaware of the malfunction, frequent water leakage from the sides of the nozzle may give the impression that the nozzle is of poor quality.

[0009] As such, there is still room for improvement in the water leakage problem with conventional water spray nozzles, and there is a demand for a water spray nozzle that does not leak water when switching the water discharge shape. [Means for solving the problem]

[0010] (Features and configuration) The characteristic configuration of the watering nozzle according to the present invention is as follows: A first case having a water guide member with a water supply port therein and provided upstream along the water flow direction; a second case connected to the downstream side of the first case along the water flow direction, having a plurality of water outlets on the downstream end surface, and rotating relative to the first case around an axis along the water outlet direction; a water-type switching member having a plurality of connection ports formed therein that communicate with the plurality of water outlets, a partition provided between the first case and the second case, and rotating integrally with the second case to connect one of the plurality of connection ports to the water supply hole; a rotational position fixing portion provided on the partition portion and the water guide member, the rotational position fixing portion including a plurality of recesses and a protrusion that is biased and engaged with one of the recesses, so as to fix the rotational positions of the partition portion and the water guide member; The partition portion, In addition to the plurality of connection ports and the rotational position fixing portion, a plurality of The feature is that a communication hole is provided so that water leaking to the first case side is discharged to the second case side.

[0011] (effect) With this configuration, water leaking into the first case during the water discharge switching operation, In addition to the multiple connection ports and rotational position fixing portions formed in the partition, multiple communication holes are distributed along the circumferential direction of the partition. The water is discharged to the side of the second case. The water guided into the second case is discharged from the spout. In the second case, in addition to water being sprayed from the spout that is in use, some of the sprayed water drips down the surface of the second case. The water discharged into the second case through the communication hole in the partition mixes with the dripping water, so the user does not feel any discomfort and does not have to worry about a water leak from the sprinkler nozzle.

[0012] Furthermore, since water does not remain on the first case side, the remaining water will not freeze after use in winter, for example, and the inconvenience of damage to internal parts can be prevented.

[0013] (Features and configuration) In the watering nozzle according to the present invention, it is preferable that the communication hole is formed at a position that does not overlap with the rotation locus of the plurality of connection ports.

[0014] (effect) This configuration prevents water from being discharged through the communication holes when the water shape switching member is operated, preventing the formation of an unintended water discharge pattern. It also prevents unnecessary water leakage when the water shape switching member is switched.

[0015] (Features and configuration) In the sprinkler nozzle according to the present invention, it is preferable that the communication hole is formed outside the rotation locus of the plurality of connection ports.

[0016] (effect) Water leaking into the first case when the water-type switching member is operated tends to collect in the area vertically below the first case. This is near the wall of the first case, and this location is outwardly positioned relative to the multiple connection ports. Therefore, forming a communication hole in this location promotes drainage toward the second case.

[0017] (Features and configuration) In the sprinkler nozzle of the present invention, the cross-sectional shape of the communicating hole in a plane perpendicular to the water discharge direction can be made circular, and the area of ​​the circular cross section can be made smaller than the cross-sectional area of ​​any of the cross sections of the multiple connection ports in a plane perpendicular to the water discharge direction.

[0018] (effect) If the cross-sectional shape of the communication hole is circular, it is extremely easy to process. Furthermore, when molding the second case from resin, stress is less likely to concentrate in the area around the communication hole, making it less likely to develop defects such as cracks during resin molding. This results in a watering nozzle with appropriate strength.

[0019] (Features and configuration) In the sprinkler nozzle of the present invention, it is advantageous if convex and concave portions that fit together to position the water supply port and the connection port are distributed and arranged on the opposing surfaces of the water guide member and the water shape switching member at positions away from the rotation trajectory of the connection port when viewed in a direction along the water flow direction.

[0020] (effect) The provision of the protrusion and recess ensures alignment of the water supply port and the connection port, making it less likely that water will leak into the first case during watering operations.

[0021] (Features and configuration) In the watering nozzle according to the present invention, it is advantageous if at least one second communication hole that connects the inside and outside of the second case is provided in the second case near the peripheral edge of the end face.

[0022] (effect) By providing a second communication hole in the second case as in this configuration, the water discharged into the second case can be further discharged to the outside of the sprinkler nozzle. In particular, during watering operations, a large amount of water is discharged from the spout of the second case, and it is difficult to distinguish whether the water discharged from the second communication hole is water related to the water discharged from the main body or water leaking from inside the sprinkler nozzle.

[0023] Furthermore, when the watering operation is finished and the tip of the watering nozzle is pointed downward, the water remaining inside the second case is quickly drained to the outside, so there is no need to worry about malfunction even if there is a leak inside the watering nozzle. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view showing the appearance of a sprinkler nozzle according to an embodiment of the present invention; [Figure 2] FIG. 1 is an exploded perspective view showing the configuration of a sprinkler unit according to an embodiment of the present invention. [Figure 3] FIG. 1 is a side cross-sectional view showing the configuration of a sprinkler unit according to the present embodiment. [Figure 4] FIG. 1 is a perspective view showing a main part of a water-type switching member according to an embodiment of the present invention; [Figure 5] A side cross-sectional view showing the configuration of the cyclone water discharge section [Figure 6] An exploded perspective view showing the main components of the cyclone water discharge section [Figure 7] FIG. 10 is a perspective view showing the configuration of a flow straightening member of a cyclone water discharge section. DETAILED DESCRIPTION OF THE INVENTION

[0025] (overview) The watering nozzle N according to the present invention can select from a number of different water discharge shapes by changing the position of its tip, and when selecting a water discharge shape, prevents some of the water from leaking out from a position other than the water discharge port P3. An embodiment of the watering nozzle N will now be described with reference to Figures 1 to 7.

[0026] As shown in Figures 1 and 3, the watering nozzle N comprises a handle grip G at the handle and a watering section C connected to the handle grip G via a long body D. The handle grip G is equipped with a joint 15 for connecting a water hose and a switch 16 for turning the water discharge on and off. The body D is a pipe-shaped member, and members of different lengths can be used depending on the purpose of watering.

[0027] The tip sprinkler section C has a first case C1 on the body D side and a second case C2 on the tip side, and different shapes of water are spouted from the tip surface of the second case C2. By rotating the second case C2 relative to the first case C1, any water outlet P3 can be selected for one water inlet P1 formed in the first case C1. This allows the multi-functional sprinkler nozzle N to be constructed compactly and lightweight.

[0028] (Case 1) 2 and 3, a water guide member 1 that supplies water to the water outlet P3 is provided inside the first case C1. In this embodiment, the outer periphery of the water guide member 1 is exposed on the surface of the sprinkler section C, and the second case C2 is arranged in contact with the tip side of the water guide member 1, so that the water guide member 1 essentially becomes the first case C1. A cylindrical water-shape switching member 3 is provided between the first case C1 and the water guide member 1.

[0029] The outlet 1a of the water-conducting member 1 is provided with one water inlet P1 that supplies water toward the water-type switching member 3. A cylindrical seal member 2 that abuts against the water-type switching member 3 (described below) is inserted into this water inlet P1. A step 1b is provided at the back of the seal member 2, and a biasing member 4, such as a coil spring 4a, is provided to press the seal member 2 against the partition portion 3a of the water-type switching member 3. When the water-type switching member 3 is rotated via the second case C2, the partition portion 3a slides and rotates relative to the seal member 2. When any of the connection ports P2 formed on the partition portion 3a is selected, the seal member 2 abuts against the periphery of that connection port P2, forming a flow path for running water.

[0030] The water guide member 1 and the partition 3a are provided with a protrusion 5a and a recess 5b to bias and fix the rotational positions of the water shape switching member 3 and the second case C2. The protrusion 5a here is a cylindrical member with a spherical tip and a flat base. The protrusion 5a is inserted into the storage hole 1c of the water guide member 1 together with a second biasing member 5c, such as a coil spring, and is constantly biased toward the partition 3a.

[0031] A plurality of recesses 5b are provided on the surface of the partition 3a facing the water guide member 1, along the circumferential direction around the rotation axis X of the second case C2. The recesses 5b are formed with, for example, a substantially spherical portion so that the protrusions 5a can be fitted therein. In this embodiment, four recesses 5b are provided to determine the positioning of the four water discharge ports P3.

[0032] Figure 4 shows the partition 3a as viewed from the water guide member 1 side. Four connection ports P2 are formed in a circumferentially dispersed manner around the rotation axis X. Two dashed lines drawn between the four connection ports P2 indicate the outline of the contact area of ​​the seal member 2. Four recesses 5b are formed at positions outside this rotation trajectory. Meanwhile, the movement trajectory of the protrusions 5a is shown by dotted lines. As a result, the protrusions 5a do not fit into the connection ports P2, and the recesses 5b do not communicate with the movement trajectory of the seal member 2, preventing some of the running water from leaking into the inside of the first case C1 through the recesses 5b when the partition 3a is rotated.

[0033] (Case 2) The second case C2 is rotatably disposed on the tip side of the water guide member 1. Specifically, a first engagement step 1d is formed on the outer peripheral surface of the water guide member 1, continuing in the circumferential direction. A plurality of first claws 3b formed along the circumferential direction near the base end of the outer wall of the water shape switching member 3 engage with this first engagement step 1d. The engagement of these first claws 3b prevents the water shape switching member 3 from slipping out in the water discharge direction, and the water shape switching member 3 is rotatably attached to the water guide member 1.

[0034] The outer surface of the water-type switching member 3 is generally cylindrical, and multiple second engagement recesses 3c are formed circumferentially on the surface distal to the first claws 3b. A second case C2 is fitted onto the outside of the water-type switching member 3. Second claws C2a are formed on the inner surface of the second case C2, engaging with the second engagement recesses 3c. The engagement between the second claws C2a and the second engagement recesses 3c prevents the second case C2 from coming off. Furthermore, the wall of the second case C2 prevents the wall of the water-type switching member 3 from expanding in diameter, thereby preventing the first claws 3b from coming off the first engagement step 1d.

[0035] As shown in Figure 2, the water shape switching member 3 of this embodiment has four water outlets P3. These are a jet water outlet P3a, which sprays water in a straight line without spreading, a flat water outlet P3b, which sprays water in a fan-shaped pattern, a straight water outlet P3c, which sprays water in the same shape as that of a water faucet, and a cyclone water outlet P3d, which sprays water in a spiral pattern. Other options include a mist water outlet that sprays fine mist-like water, a cone water outlet that sprays water in a diffused, conical film shape, and a triangle water outlet in which three narrow, fan-shaped water outlets form each face of a triangular pyramid. Of these, the jet water outlet P3a, flat water outlet P3b, straight water outlet P3c, and mist water outlet achieve the desired water outlet shape by adjusting the shape of the water outlet P3.

[0036] (Cyclone outlet) In contrast, as shown in Figures 5 and 6, the cyclone water outlet P3d is not determined by the shape of the outlet, but uses a top K that changes the water outlet direction by its own rotation. The top K is housed within a cylindrical retainer R in a state where it can rotate due to the water flow, and is installed in a part of the water shape switching member 3. A flow path is provided in the center of the top K, and by rotating the water outlet direction, the water outlet takes on a shape similar to a coil spring that flares out at the end.

[0037] As shown in Figure 5, a cylindrical retainer holding space 3d is provided in part of the water-type switching member 3. One end face of the retainer holding space 3d is a partition portion 3a, which has a single connection port P2. The opposite downstream end is simply formed with a circular opening, through which the retainer R is inserted.

[0038] The downstream end of the retainer R abuts against the second case C2 that is fitted and fixed onto the water-type switching member 3, preventing it from slipping out of the water-type switching member 3. A rectifying member S, which will be described later, is inserted into the upstream end of the retainer R, and this rectifying member S abuts against the bottom of the retainer holding space 3d, i.e., the partition portion 3a, thereby fixing the position of the retainer R to the water-type switching member 3. A seal ring 6 is provided between the retainer R and the inner wall surface Rc of the retainer holding space 3d, preventing water that has flowed in from the connection port P2 from flowing along the outer surface of the retainer R and being discharged from the tip of the second case C2. do.

[0039] An opening receiving portion Rb is formed at the downstream end of the retainer R to rotatably and slidingly support a top K (described later). The outer peripheral surface Ka of the upstream end of the top K that rotates inside the retainer R abuts against the cylindrical inner wall surface Rc of the retainer R. As a result, the top K moves in a direction perpendicular to the axis of rotation of the retainer R. The rollers roll inside the retainer R while contacting the inner wall surface Rc of the retainer R, forming a triangular pyramid-shaped rotation locus.

[0040] As shown in Figure 6, the top K is composed of a top body K1 and a blade member K2 that is inserted and fixed to the upstream side of the top body K1. A flow path is formed through the inside of the top body K1. The downstream end is formed in a roughly spherical shape and is rotatably and slidably supported by the opening receiving portion Rb of the retainer R. The inner diameter of the internal flow path is large in about half of the upstream region, and the blade member K2 is inserted and fixed therein.

[0041] The blade member K2 here has four blades K2a aligned along the direction of the flowing water. The longer the blades K2a are along the direction of the flowing water, the greater the straightening effect. Meanwhile, inside the top body K1, a linear flow path is formed from near the center to the downstream cyclone water outlet P3d. The flowing water that joins at the downstream end of the blades K2a flows through this linear flow path, resulting in a straightening effect. It will increase even more.

[0042] By dividing the internal space of the top body K1 with the blade members K2, the top K can be easily rotated by the flowing water flowing in from the inlet, improving the straightening effect of the flowing water. In particular, by stopping the swirling of the flowing water inside the top K, a straight, straight current is discharged from the outlet P3 of the top K. Since the water itself does not rotate, scattering after discharge is eliminated, and beautiful swirling water can be obtained. Eliminating water scattering reduces energy loss and improves the cleaning effect.

[0043] The blade members K2 are attached to the top body K1 by engaging the claws K2b on the edges of the blades K2a with the locking holes K1a formed through the wall of the top body K1. By assembling the top K using this type of engagement, tops K of complex shapes can be easily obtained.

[0044] At least one recess K1b is formed in the circumferential direction on the outer surface of the top K. By providing this recess K1b, a rotational force can be applied to the top K by water flowing along the outer surface of the top K. The locking hole K1a is formed at the bottom of the recess K1b when viewed from the outside of the top K. In this way, by forming parts that perform multiple functions together in one place, a top K with a rational configuration can be obtained.

[0045] A rod-shaped first guide K2c is formed at the upstream end of the blade member K2 along the axial direction of the top K. Meanwhile, a rod-shaped second guide Sa is also formed to protrude from the surface of the flow straightening member S (described later) facing the top K. As shown in FIG. 6, these are formed so that the top K is always tilted with respect to the axis X1 of the retainer R, and the first guide K2c rotates around the second guide Sa. The outer peripheral surface Ka of the top K on the upstream side abuts against the inner wall surface Rc of the retainer R, restricting further outward displacement. As a result, the top K rotates on its axis while tilted and revolves inside the retainer R.

[0046] The flow straightening member S attached to the upstream end of the retainer R is a member that receives flowing water from the connection port P2 of the water shape switching member 3 and forms a spiral water flow toward the inner wall surface Rc of the retainer R. As shown in Fig. 7, a water inlet P4 that receives flowing water is formed at the upstream end of the flow straightening member S. A portion of the water inlet P4 is formed by a substantially conical protrusion Sc that protrudes upstream, and six swirl flow paths Sb, for example, are provided around the periphery of the substantially cylindrical internal space.

[0047] As shown in FIG. 7(b), each swirl flow path Sb has an inclination α of about 30 degrees from the center of the water inlet P4 to a direction perpendicular to the inner wall surface Rc of the retainer R when viewed in the direction of water flow. As a result, the flowing water collides with the inner wall surface Rc of the retainer R and then becomes a swirling flow, causing the top K to rotate on its axis via the blade member K2 and revolve along the inner wall surface Rc of the retainer R.

[0048] The convex portion Sc has a generally conical shape and has a vertex Sd, which forms a water distribution surface that spreads out in all directions from the vertex Sd. The flowing water that hits the convex portion Sc is dispersed around the vertex Sd and flows down toward the inner wall surface Rc of the retainer R. To achieve this dispersion effect, the vertex Sd need only be located at a position that overlaps with the water inlet P1 when viewed in a direction along the axis X1 of the retainer R, and does not necessarily have to coincide with the center position of the water inlet P1.

[0049] The flowing water that flows into the flow straightening member S via the water supply port P1, the connection port P2, and the water receiving port P4 is dispersed around the apex Sd toward the inner wall surface Rc of the retainer R. As shown in Figure 5, in this embodiment, the position of the apex Sd is offset from the center of the water receiving port P4, i.e., from the axis X1 of the retainer R, but the flowing water is dispersed in all directions around the apex Sd, and a good spiral flow is formed inside the retainer R.

[0050] By offsetting the position of the apex Sd from the axis X1 of the retainer R as in this configuration, the positioning of the top K and the retainer R is less restricted by the position of the water supply port P1, and the degree of freedom in the arrangement of the water flow channel is increased. As a result, the design of the watering nozzle N is more versatile.

[0051] 5 and 7, the apex Sd in this embodiment is positioned so as to coincide with the center of the water supply port P1 and the connection port P2 of the water-shaped switching member 3 when viewed in the direction along the axis X1 of the retainer R. This allows the water flowing in from the connection port P2 to be evenly dispersed around the apex Sd, forming a stable swirling flow along the inner wall surface Rc of the retainer R.

[0052] 5 and 6, the retainer R and the rectifying member S must be attached at a predetermined rotational phase relative to the water-shaped switching member 3. A first fitting portion J1 with a concave-convex shape is provided between the end of the retainer R and the outer periphery of the rectifying member S, and a second fitting portion J2 with a concave-convex shape is also provided between the outer periphery of the retainer R and the water-shaped switching member 3.

[0053] The flowing water that is diverted by the convex portion Sc and flows toward the inner wall surface Rc has a directional component toward the downstream side. This reduces the pressure loss of the flowing water passing through the straightening member S, ensuring the desired flow rate. This configuration allows for a wide range of design options for the watering nozzle N equipped with the cyclone water outlet P3d.

[0054] (Communication hole) In a watering nozzle N that can select and switch between multiple water outlets P3, water that flows into the water shape switching member 3 from a connection port P2 that is aligned with the water inlet P1 of the water guide member 1 is shaped and discharged by each of the water outlets P3. Second water outlets P6 corresponding to each of the water outlets P3 are formed on the end face of the second case C2 so as not to come into contact with the discharged water. Normally, most of the water supplied to the water shape switching member 3 from the water inlet P1 of the water guide member 1 is discharged from the selected water outlet P3.

[0055] However, as shown in Figure 3(b), some water leaks into the space upstream of the water shape switching member 3, as described below. When the second case C2 is rotated while water is being discharged from the water outlet P3, the connection port P2 of the water shape switching member 3 rotates, temporarily releasing the sealed state with the sealing member 2. At that time, some of the water from the water inlet P1 flows back upstream of the water shape switching member 3, rather than into the water outlet P3. This leakage due to backflow occurs twice: when the sealing member 2 moves away from the connection port P2 it had been sealing, and when it aligns with the adjacent connection port P2.

[0056] The backflowing water leaks out from, for example, the gap between the water guide member 1 and the water shape switching member 3, and the gap between the water guide member 1 and the base end of the second case C2, as shown by the dotted arrows in FIG. A user of the water spray nozzle N who sees this water leakage may assume that the water spray nozzle N has broken down.

[0057] Therefore, as shown in Figures 3 and 4, multiple communication holes H1 are provided in the partition portion 3a of the water-shaped switching member 3. The communication holes H1 are provided on the outer edge of the partition portion 3a and are distributed in three regions along the circumferential direction. The communication holes H1 are also provided in positions that do not overlap with the rotation trajectories of the multiple connection ports P2. By providing the communication holes H1 in this way, even if water leaks toward the first case C1 when the water discharge shape is changed, the leaked water is discharged through the communication holes H1 to the second case C2.

[0058] By distributing the communication holes H1 circumferentially, whichever water outlet P3 of the watering nozzle N is in use, one of the communication holes H1 is likely to be located downward, allowing leaked water to be discharged toward the water outlet P3. Furthermore, because the communication holes H1 are provided on the outer edge of the partition 3a where leaked water is likely to accumulate, the water inside the first case C1 can be most efficiently discharged toward the second case C2.

[0059] Furthermore, the shape of each communication hole H1 is, for example, a circular cross section in a plane perpendicular to the water discharge direction. A circular cross section is extremely easy to process. Furthermore, the cross section of this small hole is small, for example, about 1 mm, so stress concentration in the surrounding area of ​​the communication hole H1 is low. Therefore, defects such as cracks are less likely to occur during resin molding, etc., and the required strength can be maintained.

[0060] By providing this communication hole H1, it is possible to prevent a user from being troubled by the watering nozzle N during watering work. Furthermore, particularly in cold weather, water stagnating inside the first case C1 can be eliminated, preventing damage to the watering nozzle N due to freezing.

[0061] (2nd communication hole) 2 and 3, at least one second communication hole H2 that connects the inside and outside of the second case C2 is provided near the peripheral edge of the end face of the second case C2. The second communication hole H2 is formed, for example, in an arc shape, and is formed further outside the three second water outlets P6.

[0062] In this way, by providing the second case C2 with the second communication hole H2, water discharged from the communication hole H1 into the interior of the second case C2 can be further discharged to the outside. In particular, during watering, a large amount of water is discharged from the second water outlet P6 of the second case C2, making it difficult to distinguish whether the water discharged from the second communication hole H2 is water discharged from the main body or water leaking from inside. Furthermore, when the watering operation is completed and the tip of the watering nozzle N is pointed downward, the water remaining inside the second case C2 is quickly drained to the outside. Therefore, the user does not notice water leaking from the watering nozzle N.

[0063] (Example) The specific dimensions of each part, materials used, etc. of the watering nozzle N according to the first embodiment are as follows: It can be configured as follows.

[0064] The diameter of the communication hole H1 provided in the water-type switching member 3 is, for example, φ1.3 mm. However, it may be 1 mm to 2 mm, and can be set appropriately as long as the drainage function is exhibited and the strength of the member is not reduced.

[0065] The first case C1 and second case C2, the water-type switching member 3, and the water-guiding member 1 can be made of, for example, ABS resin (Acrylonitrile-Styrene-Acrylate resin). ABS resin has the necessary strength and is excellent for forming engaging claws and the like. It also has few molding defects such as water creases during resin molding and is cost-effective. However, this is not limited to this, and for example, components such as the water-type switching member 3 and the water-guiding member 1, which are subject to water pressure and are susceptible to sliding wear during rotation, may be made of PC (polycarbonate), PP (polypropylene), POM (polyacetal), etc.

[0066] For example, NBR (nitrile rubber) is used as the sealing member 2. NBR has excellent heat resistance and oil resistance, and is inexpensive.

[0067] The top body K1 for cyclone water discharge can be made of HDPE (High Density Polyethylene), stainless steel (SUS), etc. Because the top K slides against the retainer R, a material that is resistant to wear is preferable. Furthermore, since the top K rotates, a material with a lighter specific gravity can rotate it with a weaker swirling flow. On the other hand, the blade member K2 can be made of POM, etc. If POM is used, it has a certain strength when the claw portion K2b is formed and is less likely to deform over time. The length of the blade member K2 along the water flow direction is set to be approximately 55% of the length of the top body K1.

[0068] The specific gravity of the top K was set to 0.94 to 0.96 when the top body K1 and the blade members K2 were assembled. The smaller the specific gravity, the easier it is to rotate the top K. Furthermore, good rotation performance was obtained when the surface roughness of the tip of the top body K1, which slides against the opening receiving portion Rb of the retainer R, was set to about #1000 sandpaper.

[0069] The retainer R is preferably made of POM or the like to provide it with wear resistance and strength against sliding with the piece K.

[0070] For the straightening member S, the angle of the swirling flow passage Sb, i.e., the angle with respect to the radial direction passing through the center of the straightening member S, was set to 30 degrees, and the width of the swirling flow passage Sb was set to 1.5 mm. Six swirling flow passages Sb were provided, and the total water flow cross-sectional area was 22.74 mm 2 It was decided. The angle of the swirl flow path Sb increases as it approaches the inner wall surface Rc of the retainer R. However, if the total water flow cross-sectional area is 24 mm 2 In the following cases, if the angle of the swirl flow path Sb exceeds 40 degrees relative to the radial direction, the swirl speed of the top K becomes excessively high, which may reduce the durability of the top K. Furthermore, the narrower the gap between the outlet of the swirl flow path Sb and the inner wall surface Rc of the retainer R, the higher the swirl speed of the top K. In this embodiment, the gap is set to 1 mm. [Industrial Applicability]

[0071] The water spray nozzle according to the present invention is widely applicable to a water spray nozzle that can switch between a plurality of types of water discharge shapes. can be applied. [Explanation of symbols]

[0072] 1 Water conducting member C1 Case 1 C2 Second Case K frame K1a Locking hole K1b recess K2 Blade member K2a Feather K2b Claw N Watering nozzle P1 water inlet P4 Water intake P5 inlet R retainer Rb Opening Receptacle Rc inner wall surface S Straightening member Sb swirl flow path Sc convex part Sd vertex

Claims

1. a first case having a water guide member with a water supply port therein and provided upstream along the water flow direction; a second case connected to the downstream side of the first case along the water flow direction, having a plurality of water outlets on the downstream end surface, and rotating relative to the first case around an axis along the water outlet direction; a water-type switching member having a plurality of connection ports formed therein that communicate with the plurality of water outlets, the water-type switching member having a partition portion provided between the first case and the second case, and rotating integrally with the second case to connect one of the plurality of connection ports to the water supply port; a rotational position fixing portion provided on the partition portion and the water guide member, the rotational position fixing portion including a plurality of recesses and a protrusion that is biased and engaged with one of the recesses, so as to fix the rotational positions of the partition portion and the water guide member; In addition to the multiple connection ports and the rotational position fixing portion, the partition portion is provided with multiple communication holes distributed along the circumferential direction of the partition portion, and the watering nozzle is configured to discharge water that leaks toward the first case side toward the second case side.

2. The watering nozzle according to claim 1 , wherein the communication hole is formed at a position that does not overlap with the rotation locus of the plurality of connection ports.

3. The watering nozzle according to claim 2 , wherein the communication holes are formed outside the rotation locus of the plurality of connection ports.

4. A watering nozzle as described in any one of claims 1 to 3, wherein the cross-sectional shape of the communicating hole taken in a plane perpendicular to the water discharge direction is circular, and the area of ​​the circular cross section is smaller than the cross-sectional area of ​​any of the cross sections of the multiple connection ports taken in a plane perpendicular to the water discharge direction.

5. A watering nozzle as described in any one of claims 1 to 4, wherein convex portions and concave portions that fit together to position the water supply port and the connection port are arranged on the opposing surfaces of the water guide member and the water shape switching member at positions away from the rotation trajectory of the connection port when viewed in a direction along the water flow direction.

6. A watering nozzle as described in any one of claims 1 to 5, wherein at least one second communication hole connecting the inside and outside of the second case is provided near the peripheral portion of the end face of the second case.

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