Scattered water nozzle

Abstract

To provide a sprinkler nozzle which can stabilize rotation of a disc holder when cyclone water discharge is selected.SOLUTION: A sprinkler nozzle includes: a first case C1 in which a water guide member having a water supply port P1 is installed; a second case C2 at the downstream side; a retainer R which is provided at the second case C2 and receives flowing water from the water supply port P1; a disc holder K which includes a passage and is disposed in the retainer R with a downstream side end rotatably supported by an opening receiving part Rb formed at an end of the retainer R and which autorotates by flowing water received by an inflow port P5 and revolves in the retainer R; and a straightening member S which has a water receiving port P4 for receiving flowing water from the water supply port P1, is disposed at an upstream side end of the retainer R and located at a position overlapping with the water supply port P1 when viewed in a direction along an axis of the retainer R, and includes a protruding part Sc having an apex Sd protruding toward the water supply port P1, the straightening member S having multiple spiral passages Sb in which flowing water spirally flows along the protruding part Sc. The apex Sd is offset from the axis X1 of the retainer R when viewed in the direction along the axis X1 of the retainer R.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a watering nozzle provided with a spinning top inside a case and capable of forming spiral water spray.

Background Art

[0002] Conventionally, as a technology related to such a watering nozzle, for example, there is one shown in the following Patent Document 1 (see paragraphs

[0007] to

[0008] of the specification, FIGS. 1, 2, etc.).

[0003] The technology according to Patent Document 1 is a nozzle that ejects air instead of discharging running water. However, it is a common technology in that it ejects fluid in a spiral shape.

[0004] The nozzle according to Patent Document 1 arranges a rotatable nozzle body 40 inside a chamber CH, and while rotating the nozzle body 40 by the air supplied to the chamber CH, ejects spiral air from the tip of the nozzle body 40. The tip of the nozzle body 40 is formed in a spherical shape and is rotatably supported in contact with a nozzle hole 37 provided in the chamber CH.

[0005] A blade-shaped member 50 is formed on the base end side of the nozzle body 40, and the outer diameter of the blade-shaped member 50 is smaller than the inner diameter of the chamber CH. As a result, the nozzle body 40 rotates by the swirling air supplied along the inner wall surface of the chamber CH, and the tip rotates on the axis of the chamber CH while the base end side revolves inside the chamber CH. The rotating nozzle body 40 is pressed against the nozzle hole 37 by the air pressure inside the chamber CH, and the contact and sealing state between the tip of the nozzle body 40 and the nozzle hole 37 is maintained. Thus, it is said that strong spiral air can be ejected from the tip of the nozzle body 40.

[0006] In this nozzle, the axis of the chamber CH coincides with the axis of the air passage 34 provided upstream of the chamber CH to supply air to the chamber CH. The air passing through the air passage 34 collides with the bottom of the air passage 34 and is once deflected in the radial direction with respect to the axis. Thereafter, air of equal flow rate is supplied into the chamber CH from two air introduction holes 32A provided around the chamber CH, respectively.

[0007] Thus, if the axis of the chamber CH is made to coincide with the axis of the air passage 34, the conditions of the flow paths from the air passage 34 to the respective air introduction holes 32A become the same, and it becomes easier to form uniform spiral air around the axis.

[0008] Also, since these flow paths are symmetric with respect to the axis when viewed in a direction perpendicular to the axis and when viewed in a direction along the axis, the formation and processing of these members become easy.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0010] In the nozzle of the above Patent Document 1, often only one air ejection port is formed for one air passage 34. Therefore, as described above, it is sufficient that the constituent members are evenly arranged around the axis. However, in a nozzle that discharges a flowing fluid such as water instead of air, there is a desire to switch the water discharge shape from the nozzle tip by rotating the case or the like.

[0011] The water spray shapes include jet sprays where the water spray spreads in a conical shape, flat sprays where the water spray spreads in an elliptical shape, straight sprays that are the same shape as the water outlet from the faucet of a water tap, and cyclone sprays where the water spray becomes spiral. The nozzle shapes for forming these water sprays are different from each other, and the cyclone spray mechanism with many components tends to be large in size. Therefore, in order to arrange these nozzles so that they can be switched, it is necessary to devise the overall arrangement of each nozzle, and also to devise the coordination between the position of the water outlet of each nozzle and the position of the water supply port that supplies water to each nozzle.

[0012] Furthermore, in order to form a cyclone water outlet, it is necessary to rotate the disc provided inside reliably and smoothly, and a different device is required from the configuration of other water outlets. The cyclone spray mechanism tends to be large in size. When only one water supply port is provided in the sprinkler nozzle, the deviation between the position of the water supply port and the rotation axis of the disc becomes large. For this reason, it is not easy to form a uniform swirling flow around the disc.

[0013] As described above, in the conventional sprinkler nozzle provided with a cyclone water outlet, there is still room for improvement, and a sprinkler nozzle that can stabilize the rotation of the disc when cyclone spraying is selected is required.

Means for Solving the Problems

[0014] (Characteristic Configuration) The characteristic configuration of the sprinkler nozzle according to the present invention is having a water guiding member with a water supply port inside, a first case provided on the upstream side along the flowing water direction, and a second case connected to the downstream side of the first case along the flowing water direction, and a cylindrical retainer provided inside the second case for receiving the flowing water from the water supply port, and a disc that has a flow path along the flowing water direction, is rotatably supported at the end of the downstream side by an opening receiving portion formed at the end of the retainer, is arranged inside the retainer, receives the flowing water from the water supply port through an inlet provided on the upstream side, rotates by itself, and revolves inside the retainer, and It is arranged at the upstream end of the retainer so as to form a water inlet for receiving flowing water from the water supply port, is located at a position overlapping the water supply port in a view along the axial center of the retainer, and has a convex portion with a vertex protruding toward the water supply port, and a rectifying member having a plurality of swirling flow paths for guiding the flowing water along the convex portion and spirally toward the inner wall surface of the retainer. In a view along the axial center of the retainer, the vertex is provided at a position deviated from the axial center of the retainer.

[0015] (Effect) In the sprinkler nozzle of this configuration, in a view along the axial center of the retainer, the vertex of the rectifying member is provided at a position overlapping the water supply port of the water guiding member and deviated from the axial center of the retainer. That is, the distribution of the flowing water to the retainer is performed at a position deviated from the axial center of the retainer.

[0016] The flowing water flowing in from the water inlet is dispersed on the inner wall surface of the retainer around the vertex facing the water inlet. Although the position of the vertex is deviated from the axial center of the retainer, the flowing water is dispersed in all directions centered on the vertex, and a good spiral flow is formed inside the retainer. At that time, the flowing water dispersed in each direction by the vertex flows downward toward the inner wall surface of the retainer while having a component in the direction along the axial center of the retainer. Therefore, the pressure loss of the flowing water here is reduced and the desired flow rate can be ensured. As a result, a uniform swirling flow is formed around the impeller, and the rotation of the impeller becomes smooth and stable, and beautiful cyclone water discharge can be obtained.

[0017] Also, with this configuration, it becomes difficult for the arrangement positions of the impeller and the retainer to be restricted by the position of the water supply port, and the degree of freedom in arranging the water flow path increases. As a result, the design of the sprinkler nozzle becomes wide-ranging.

[0018] In the sprinkler nozzle according to the present invention, it is advantageous that the vertex is provided at a position coinciding with the center of the water supply port in a view along the axial center of the retainer.

[0019] (Effect) By aligning the position of the vertex with the center of the water inlet, the flowing water will be evenly dispersed in all directions centered on the vertex. As a result, a good spiral flow is formed on the inner wall surface of the retainer, and the rotation of the impeller becomes more stable.

[0020] (Characteristic configuration) In the sprinkler nozzle according to the present invention, it is advantageous that at least one recess is provided on the outer wall surface of the impeller.

[0021] (Effect) By providing a recess on the outer wall surface of the impeller as in this configuration, a rotational force is applied to the impeller by the spiral flowing water flowing out from the flow rectifying member. That is, the impeller receives a rotational force from the flowing water near the outer recess in addition to the flowing water flowing into the internal flow path from the inlet. As a result, since the rotational force is applied using the entire circumferential region of the impeller, the rotation of the impeller is promoted and stable rotation is maintained.

[0022] (Characteristic configuration) The sprinkler nozzle according to the present invention includes a blade member that divides the upstream internal space of the internal space of the impeller into a plurality by blades along the direction of the flowing water, and the blade member can be attached by engaging a claw portion provided at the edge of the blade with a locking hole portion formed through the recess provided in the wall portion of the impeller.

[0023] (Effect) By dividing the internal space of the impeller by blades, the impeller is more likely to rotate by the flowing water from the inlet. Furthermore, by stopping the swirling of the flowing water inside the impeller by the blades, the rectifying effect of the flowing water is enhanced, and a straight flow is discharged from the water outlet of the impeller. For this reason, the scattering after water discharge due to the swirling of the water discharge itself is eliminated, and a beautiful swirling water discharge based only on the swirling of the axis of the water outlet can be obtained. By eliminating the scattering of the water shape, a large mass of water can be made to collide with the object to be sprinkled, and the cleaning effect is enhanced.

[0024] In this configuration, since such a blade member is attached to the disk by the claw portion and the locking hole portion, a disk with a complex shape can be easily obtained. Further, since the locking hole portion utilizes the recess provided in the wall portion so as to contribute to the rotation of the disk, portions that exhibit a plurality of functions can be formed together at one location, and a disk with a rational configuration can be obtained.

[0025] (Characteristic configuration) In the sprinkler nozzle according to the present invention, the second case is provided with at least one other water discharge port that discharges water in a different shape, in addition to the water discharge port that discharges spiral water by the disk, the retainer, and the flow rectifying member, and it is advantageous if one of these plurality of water discharge ports can be selected by the rotation of the second case.

[0026] (Effect) This configuration arranges, on the second case that rotates with respect to the first case, a water discharge port that discharges spiral water using a disk, a retainer, and a flow rectifying member, and another water discharge port that obtains other water discharge shapes, together. Examples of other water discharge shapes include jet water discharge in which the water discharge spreads in a conical shape, and flat water discharge in which the water discharge spreads in an elliptical shape. In the case of this configuration, while there is one water supply port for supplying running water, various water discharge shapes can be selected, and a sprinkler nozzle with high convenience can be obtained.

[0027] Also, the configuration of the water discharge port that uses a disk or a retainer is more complex and larger in size than the configuration of the water discharge port related to other water discharges. In the retainer of this configuration, since the position of the apex of the convex portion that distributes the running water flowing in from the water receiving port of the retainer is offset from the center of the retainer, the substantial center of the water receiving port can be greatly offset with respect to the arrangement position of the disk and the retainer. Therefore, including the water receiving ports related to other water discharge ports, all the water receiving ports can be intensively arranged in a narrow area. Thereby, when configuring a switching type sprinkler nozzle provided with a water discharge port using a disk or a retainer, the other water discharge ports can be configured with the minimum necessary size. Therefore, with this configuration, a more compact and lightweight sprinkler nozzle can be obtained.

Brief description of the drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0029] (Overview) The sprinkler nozzle N according to the present invention can select a plurality of water discharge shapes by changing the posture of the tip portion. In particular, the mechanism of cyclone water discharge that forms a spiral water discharge is rationally configured. Hereinafter, an embodiment of the sprinkler nozzle N will be described with reference to FIGS. 1 to 7.

[0030] As shown in FIGS. 1 and 3, the sprinkler nozzle N includes a handle grip G at hand and a watering section C connected thereto via a long cylindrical portion D. The handle grip G is provided with a joint 15 for connecting a water pipe and a switch 16 for turning the water discharge state on and off. The cylindrical portion D is a pipe-shaped member, and members having different lengths can be adopted according to the purpose of watering.

[0031] In addition, the water sprinkling part C at the tip includes a first case C1 on the side of the body part D and a second case C2 on the tip side, and water is discharged in different shapes from the front end surface of the second case C2. By rotating the second case C2 with respect to the first case C1, an arbitrary water discharge port P3 can be selected for one water supply port P1 formed in the first case C1. Therefore, the water sprinkling nozzle N with multiple functions can be configured compactly and lightly.

[0032] (First case) As shown in FIGS. 2 and 3, a water guiding member 1 for supplying water to the water discharge port P3 is provided inside the first case C1. In this embodiment, the outer peripheral part of the water guiding member 1 is exposed on the surface of the water sprinkling part C, and the second case C2 is arranged in contact with the tip side thereof. Therefore, substantially, the water guiding member 1 serves as the first case C1. A cylindrical water shape switching member 3 is provided between the first case C1 and the water guiding member 1.

[0033] One water supply port P1 for supplying water toward the water shape switching member 3 is provided at the outlet part 1a of the water guiding member 1. A cylindrical seal member 2 that contacts the water shape switching member 3 described later is inserted into this water supply port P1. A stepped part 1b is provided at the back of the seal member 2, and a biasing member 4 such as a coil spring 4a that presses the seal member 2 against the partition part 3a of the water shape switching member 3 is provided. When the water shape switching member 3 is rotationally operated via the second case C2, the partition part 3a slides and rotates with respect to the seal member 2. When an arbitrary connection port P2 among a plurality of connection ports P2 formed in the partition part 3a is selected, the seal member 2 contacts around this connection port P2, and a flow path for flowing water is formed.

[0034] Protrusions 5a and recesses 5b are provided on the water guiding member 1 and the partition part 3a 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 columnar member, the tip is formed in a spherical shape, and the base end is formed in a planar shape. The protrusion 5a is inserted and arranged in the accommodation hole part 1c of the water guiding member 1 together with a second biasing member 5c which is a coil spring, for example, and is constantly biased toward the partition part 3a.

[0035] One of the recesses 5b has a plurality of them provided along the circumferential direction around the rotation axis X of the second case C2 on the surface of the partition portion 3a facing the water guiding member 1. The recess 5b is formed with, for example, a substantially spherical portion so that the convex portion 5a can be fitted therein. In the present embodiment, four recesses 5b are provided for positioning the four water discharge ports P3.

[0036] FIG. 4 shows a state of the partition portion 3a as viewed from the side of the water guiding member 1. Four connection ports P2 are formed dispersedly in the circumferential direction around the rotation axis X. The two dashed-dotted lines shown so as to sandwich the four connection ports P2 indicate the contour of the contact region of the seal member 2. The four recesses 5b are formed at positions deviated from this rotation locus. On the other hand, the movement locus of the convex portion 5a is indicated by a dotted line. Thereby, since the convex portion 5a does not fit into the connection port P2 and the recess 5b does not communicate with the movement locus of the seal member 2, it is possible to prevent a part of the flowing water from leaking into the inside of the first case C1 through the recess 5b during the rotation operation of the partition portion 3a.

[0037] (Second case) The second case C2 is disposed on the tip end side of the water guiding member 1 in a rotatable state. Specifically, a first engaging step portion 1d continuous in the circumferential direction is formed on the outer peripheral surface of the water guiding member 1. A plurality of first claw portions 3b formed along the circumferential direction engage with the first engaging step portion 1d in the vicinity of the end portion on the base end side of the outer wall portion of the water shape switching member 3. By the engagement of the first claw portion 3b, the water shape switching member 3 is restricted from coming off along the water discharge direction and is rotatably attached to the water guiding member 1.

[0038] The outer surface of the water pattern switching member 3 has a substantially cylindrical shape, and a plurality of second engaging recesses 3c are formed along the circumferential direction on the surface on the tip side of the first claw portion 3b. A second case C2 is externally inserted outside the water pattern switching member 3. A second claw portion C2a that engages with the second engaging recess 3c is formed on the inner surface of the second case C2. By the engagement between the second claw portion C2a and the second engaging recess 3c, the second case C2 is restricted from coming off. Further, by the wall portion of the second case C2 pressing down the diameter expansion of the wall portion of the water pattern switching member 3, the water pattern switching member 3 is prevented from coming out of the first engaging step portion 1d of the first claw portion 3b.

[0039] As shown in FIG. 2, the water pattern switching member 3 of the present embodiment includes four water discharge ports P3. They are a jet water discharge port P3a where the discharged water advances straight vigorously without spreading, a flat water discharge port P3b where the discharged water spreads in a fan shape, a straight water discharge port P3c having the same shape as that from the faucet of a water tap, and a cyclone water discharge port P3d where the discharged water becomes spiral. In addition to these, a mist water discharge port that discharges fine mist-like water, a cone water discharge port that is discharged in a conical film shape and diffused, a triangle water discharge port where three narrow fan-shaped water discharges form each surface of a triangular pyramid, etc. can be set. Among these, the jet water discharge port P3a, the flat water discharge port P3b, the straight water discharge port P3c, and the mist water discharge port obtain a desired water discharge shape by setting the shape of the water discharge port P3.

[0040] (Cyclone water discharge part) On the other hand, as shown in FIGS. 5 and 6, the cyclone water discharge port P3d does not depend on the shape of the water discharge port, but uses a top K that changes the water discharge direction by its own rotation. The top K is installed inside a cylindrical retainer R in a state where it can rotate by the water flow and is installed in a part of the water pattern switching member 3. A flow path is provided at the center of the top K, and by the water discharge direction rotating, the water discharge becomes a shape like a coil spring with a tapered end.

[0041] As shown in FIG. 5, a cylindrical retainer holding space 3d is provided in a part of the water shape switching member 3. One end face of the retainer holding space 3d is the partition portion 3a, and one connection port P2 is open. The downstream end on the opposite side simply has a circular opening, and the retainer R is inserted and arranged from here.

[0042] The downstream end of the retainer R abuts against the second case C2 that is externally inserted and fixed to the water shape switching member 3, preventing it from coming out of the water shape switching member 3. A rectifying member S (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, that is, the partition portion 3a, so that the retainer R is position-fixed to the water shape 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 the water flowing in from the connection port P2 from flowing through the outer surface of the retainer R and being discharged from the tip of the second case C2.

[0043] An opening receiving portion Rb for rotatably slidably supporting the later-described disk K is formed at the downstream end of the retainer R. Also, on the cylindrical inner wall surface Rc of the retainer R, the outer peripheral surface Ka of the upstream end of the disk K that rotates inside abuts. Thereby, the disk K rolls inside the retainer R while bringing the outer peripheral surface Ka on its upstream side into contact with the inner wall surface Rc of the retainer R, forming a triangular pyramid-shaped rotation locus.

[0044] The disk K is composed of a disk main body K1 and a blade member K2 inserted and fixed upstream of the disk main body K1, as shown in FIG. 6. A flow path is formed to penetrate inside the disk main body K1. The downstream end is formed in a substantially spherical shape and is rotatably slidably supported by the opening receiving portion Rb of the retainer R. The inner flow path is configured with a larger inner diameter in the upstream approximately half region, and the blade member K2 is inserted and fixed.

[0045] The blade member K2 here is provided with four blades K2a along the direction of the flowing water. The longer the blades K2a are along the flowing water direction, the higher the rectifying effect becomes. On the other hand, 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 converges at the downstream end of the blades K2a flows through this linear flow path, further enhancing the rectifying effect.

[0046] By partitioning the internal space of the top body K1 with the blade member K2, the flowing water flowing in from the inlet makes it easier for the top K to rotate, and the rectifying effect of the flowing water is enhanced. In particular, by stopping the swirling of the flowing water inside the top K, a rectified direct current is discharged from the water outlet P3 of the top K. Since the rotation of the discharged water itself disappears, the scattering after discharge is eliminated, and a beautiful swirling water discharge can be obtained. By eliminating the scattering of the water shape, the energy loss is reduced, and the cleaning effect is enhanced.

[0047] The attachment of the blade member K2 to the top body K1 is performed by the engagement between the claw portion K2b provided at the edge of the blade K2a and the locking hole portion K1a formed through the wall portion of the top body K1. By adopting a configuration in which the top K is assembled using such an engagement, a top K with a complex shape can be easily obtained.

[0048] In addition, at least one recess K1b is formed along 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 the water flowing along the outer surface of the top K. The locking hole portion K1a is formed at the bottom of the recess K1b as viewed from the outside of the top K. In this way, by forming multiple functional parts together in one place, a top K with a reasonable configuration can be obtained.

[0049] At the upstream end of the blade base member K2, a first guide K2c protruding in a rod shape along the axial direction of the piece K is formed. On the other hand, a rod-shaped second guide Sa also protrudes and is formed on the opposing surface of the rectifying member S (to be described later) with respect to the piece K. As shown in FIG. 6, these are formed such that the piece K is always inclined 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 on the upstream side of the piece K abuts against the inner wall surface Rc of the retainer R, and further displacement outward is restricted. As a result, the piece K rotates while being inclined and revolves inside the retainer R.

[0050] The rectifying member S attached to the upstream end of the retainer R is a member that receives the 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 for receiving the flowing water is formed at the upstream end of the rectifying member S. A part of the water inlet P4 is formed by a substantially conical convex portion Sc protruding upstream, and for example, six swirling flow paths Sb are provided around the substantially cylindrical inner space.

[0051] As shown in FIG. 7(b), each swirling flow path Sb has an inclination α of about 30 degrees with respect to the direction orthogonal to the inner wall surface Rc of the retainer R from the center of the water inlet P4 in the view of the flowing water direction. As a result, the flowing water becomes a swirling flow after colliding with the inner wall surface Rc of the retainer R, rotates the piece K via the blade base member K2, and revolves along the inner wall surface Rc of the retainer R.

[0052] A vertex Sd is provided on the substantially conical convex portion Sc, and the convex portion Sc becomes a water surface that spreads in the circumferential direction from the vertex Sd. The flowing water that collides with the convex portion Sc is dispersed around the vertex Sd and flows down toward the inner wall surface Rc of the retainer R. In order to obtain this dispersion effect, the vertex Sd may be provided at any position overlapping the water supply port P1 in the view along the axis X1 of the retainer R, and it is not necessarily required to coincide with the center position of the water supply port P1.

[0053] The flowing water that has flowed into the flow rectifying member S through the water supply port P1, the connection port P2, and the water receiving port P4 is dispersed toward the inner wall surface Rc of the retainer R around the vertex Sd. As shown in FIG. 5, in this embodiment, the position of the vertex Sd is offset from the center of the water receiving port P4, that is, the axis X1 of the retainer R. However, the flowing water is dispersed in all directions around the vertex Sd, and a good spiral flow is formed inside the retainer R.

[0054] With this configuration, by offsetting the position of the vertex Sd from the axis X1 of the retainer R, it becomes difficult for the arrangement positions of the top K and the retainer R to be restricted by the position of the water supply port P1, and the degree of freedom in arranging the water flow path increases. As a result, the design of the sprinkler nozzle N becomes wide-ranging.

[0055] In addition, as shown in FIGS. 5 and 7, the vertex Sd in this embodiment is provided in a state of being aligned with the centers of the water supply port P1 and the connection port P2 of the water shape switching member 3 when viewed in the direction along the axis X1 of the retainer R. Thereby, the water flowing in from the connection port P2 is evenly dispersed around the vertex Sd, and a stable swirling flow is formed along the inner wall surface Rc of the retainer R.

[0056] For this purpose, as shown in FIGS. 5 and 6, the retainer R and the flow rectifying member S need to be attached to the water shape switching member 3 with a predetermined rotational phase. An uneven first fitting portion J1 is provided between the end portion of the retainer R and the outer peripheral portion of the flow rectifying member S, and an uneven second fitting portion J2 is also provided between the outer peripheral surface of the retainer R and the water shape switching member 3.

[0057] The flowing water that is distributed by the convex portion Sc and heads toward the inner wall surface Rc has a direction component toward the downstream side. Therefore, the pressure loss of the flowing water passing through the flow rectifying member S is reduced, and the desired flow rate can be ensured. With this configuration, a wide range of design settings are possible for the sprinkler nozzle N provided with the cyclone water discharge port P3d.

[0058] (Communication hole) In a sprinkler nozzle N capable of switching and selecting a plurality of water discharge ports P3, water flowing into the interior of a water shape switching member 3 from a connection port P2 aligned with a water supply port P1 of a water guiding member 1 is shaped by respective water discharge ports P3 and discharged. On the end face of a second case C2, second water discharge ports P6 corresponding to respective water discharge ports P3 are formed so as not to be touched by the discharged water. Normally, most of the water supplied from the water supply port P1 of the water guiding member 1 to the water shape switching member 3 is discharged from the selected water discharge port P3.

[0059] However, as shown in FIG. 3(b), a part of the water leaks into the upstream space 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 discharge port P3, the connection port P2 of the water shape switching member 3 rotates, and the sealed state with the seal member 2 is temporarily released. At that time, a part of the water from the water supply port P1 flows backward not from the water discharge port P3 but to the upstream side of the water shape switching member 3. This leakage due to the backward flow occurs twice, when the seal member 2 separates from the connection port P2 that it has sealed until then and when it is aligned with the adjacent connection port P2.

[0060] The water that has flowed backward here leaks to the outside, for example, from the gap between the water guiding member 1 and the water shape switching member 3 and from the gap between the water guiding member 1 and the base end portion of the second case C2, as indicated by the dotted arrows in FIG. 3. A user of the sprinkler nozzle N who sees this water leakage may recognize that the sprinkler nozzle N is malfunctioning.

[0061] Therefore, as shown in FIGS. 3 to 4, a plurality of communication holes H1 are provided in a partition portion 3a of the water shape switching member 3. The communication holes H1 are provided at the outer edge portion of the partition portion 3a and are dispersedly arranged in three regions along the circumferential direction. Further, the communication holes H1 are provided at positions that do not overlap the rotation trajectories of the plurality of connection ports P2. By providing the communication holes H1 in this way, even when water leaks to the side of the first case C1 when the water discharge shape is changed, the leaked water is discharged to the side of the second case C2 through the communication holes H1.

[0062] By dispersedly arranging the communication holes H1 in the circumferential direction, no matter which water discharge port P3 of the watering nozzle N is being used, any one of the communication holes H1 is likely to be located downward, and the leaked water can be discharged to the side of the water discharge port P3. Furthermore, since the communication holes H1 are provided at the outer edge of the partition portion 3a where the leaked water is likely to accumulate, the water inside the first case C1 can be most efficiently discharged to the side of the second case C2.

[0063] Also, as the shape of each communication hole H1, for example, the cross-sectional shape in a plane perpendicular to the water discharge direction is circular. If it has a circular cross-section, processing is extremely easy. Also, since the cross-sectional area of this small hole is, for example, about 1 mm and is small, there is little stress concentration in the area around the communication hole H1. Therefore, when performing resin molding or the like, defects such as cracks are less likely to occur, and the required strength can be maintained.

[0064] By providing this communication hole H1, it is possible to prevent the user during the watering operation from having concerns such as the watering nozzle N being malfunctioning. Also, especially during cold times, the stagnant water inside the first case C1 can be eliminated to prevent the freezing and damage of the watering nozzle N.

[0065] (Second communication hole) As shown in FIGS. 2 and 3, at least one second communication hole H2 that communicates the inside and outside of the second case C2 is provided near the peripheral edge of the end face in 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 discharge ports P6.

[0066] In this way, by also providing the second communication hole H2 in the second case C2, the water discharged from the communication hole H1 into the inside of the second case C2 can be further discharged to the outside. In particular, during the watering operation, the amount of water discharged from the second water discharge port P6 of the second case C2 is large, and it is difficult to distinguish whether the water discharged from the second communication hole H2 is water related to the water discharge of the main body or leaked water inside. Also, when the watering operation is completed and the tip of the watering nozzle N is directed downward, the water remaining inside the second case C2 is quickly drained to the outside. Therefore, the user is not aware of the water leakage occurring inside the watering nozzle N.

[0067] (Example) In the sprinkler nozzle N according to the first embodiment, the specific dimensions, materials used, etc. of each part can be configured as follows.

[0068] The hole diameter of the communication hole H1 provided in the water pattern switching member 3 was, for example, φ1.3 mm. However, it may be 1 mm to 2 mm, and it can be appropriately set within a range where the drainage function is exhibited and the strength of the member is not reduced.

[0069] The first case C1, the second case C2, the water pattern switching member 3, and the water guiding member 1 can be made of, for example, ABS resin (Acrylonitrile - Styrene - Acrylate resin). If it is ABS resin, it has the required strength and is also excellent in forming engaging claws, etc. In addition, there are few molding defects such as sink marks during resin molding, and the cost is reasonable. However, it is not limited to this. For example, members such as the water pattern switching member 3 and the water guiding member 1 where water pressure acts and sliding wear is a concern during rotation may be made of PC (polycarbonate), PP (polypropylene), POM (polyacetal), etc.

[0070] As the seal member 2, for example, NBR (nitrile rubber) is used. If it is NBR, it is excellent in heat resistance and oil resistance, and the cost is also low.

[0071] The disk body K1 related to cyclone water discharge can be made of HDPE (High Density Polyethylene), stainless steel (SUS), etc. Since the disk K slides with the retainer R, a material resistant to wear is preferable. Also, since it rotates, a lighter specific gravity allows it to be rotated by a weak swirling flow. One blade member K2 can be made of POM, etc. If it is POM, when the claw portion K2b is formed, it has a predetermined strength and little secular deformation. Incidentally, the length of the blade member K2 along the water flow direction was set to about 55% of the length of the disk body K1.

[0072] The specific gravity of the piece K was set to 0.94 to 0.96 in the state where the piece body K1 and the blade member K2 were assembled. The smaller the specific gravity, the easier it is for the piece K to rotate. Also, when the surface roughness of the tip of the piece body K1 that slides with the opening receiving portion Rb of the retainer R is about #1000 of sandpaper, good rotational performance was obtained.

[0073] The retainer R is preferably formed of POM or the like in order to have wear resistance and strength against sliding with the piece K.

[0074] Regarding the rectifying member S, the angle of the swirling flow path Sb, that is, the angle with respect to the radial direction passing through the center of the rectifying member S, was set to 30 degrees, and the width of the swirling flow path Sb was set to 1.5 mm. Six swirling flow paths Sb were provided, and the total water passage cross-sectional area was 22.74 mm 2 and. The swirling speed of the flowing water increases as the angle of the swirling flow path Sb approaches the state of following the inner wall surface Rc of the retainer R. However, when the total water passage cross-sectional area is 24 mm 2 or less, if the angle of the swirling flow path Sb exceeds 40 degrees with respect to the radial direction, the swirling speed of the piece K may become excessive, and the durability of the piece K may decrease. Also, the swirling speed of the piece K increases as the gap between the outlet of the swirling flow path Sb and the inner wall surface Rc of the retainer R becomes narrower. In this embodiment, the gap was set to 1 mm.

Industrial Applicability

[0075] The sprinkler nozzle according to the present invention can be widely applied to those capable of switching between a plurality of types of water discharge shapes.

Explanation of Signs

[0076] 1 Water guiding member C1 First case C2 Second case K Piece K1a Locking hole portion K1b Recess K2 Blade member K2a Blade K2b Claw portion N Sprinkler nozzle P1 Water inlet P4 Water Inlet P5 Inlet R Retainer Rb Opening Receiver Rc Inner Wall Surface S Flow Rectifying Member Sb Swirling Flow Path Sc Protrusion Sd Vertex

Claims

1. A first case having a water-conducting member with a water supply port inside and provided on the upstream side along the flowing water direction, a second case connected to the downstream side of the first case along the flowing water direction, a cylindrical retainer provided inside the second case and receiving the flowing water from the water supply port, a spinning top disposed inside the retainer while being rotatably supported by an opening receiving portion formed at an end of the retainer at the downstream side end of a flow path along the flowing water direction, receiving the flowing water from the water supply port through an inlet provided on the upstream side and rotating on its own axis and revolving inside the retainer, a rectifying member disposed at an upstream end of the retainer so as to form a water receiving port for receiving the flowing water from the water supply port, having a convex portion at a position overlapping the water supply port in a view along the axis of the retainer and having a vertex protruding toward the water supply port, and having a plurality of swirling flow paths for guiding the flowing water in a spiral shape toward the inner wall surface of the retainer while allowing the flowing water to flow down along the convex portion, a water spray nozzle in which the vertex is provided at a position deviated from the axis of the retainer in a view along the axis of the retainer.

2. The water spray nozzle according to claim 1, wherein the vertex is provided at a position coinciding with the center of the water supply port in a view along the axis of the retainer.

3. The water spray nozzle according to claim 1 or 2, comprising at least one concave portion on an outer wall surface of the spinning top.

4. The water spray nozzle according to claim 3, comprising a blade member that partitions an upstream internal space of the internal space of the spinning top into a plurality by blades along the flowing water direction, and the blade member is attached by engagement between a claw portion provided at an edge of the blade and a locking hole portion formed to penetrate a concave portion provided in a wall portion of the spinning top.

5. The water spray nozzle according to any one of claims 1 to 4, wherein the second case comprises at least one other water discharge port that discharges water of a different shape in addition to a water discharge port that discharges spiral water by the spinning top, the retainer, and the rectifying member, and one of these plurality of water discharge ports is configured to be selectable by rotation of the second case.

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