JP6474162B2 - Nozzle device - Google Patents

Description

  The present invention relates to a nozzle device that ejects fluid, and more particularly to a nozzle device that is suitable for a configuration in which a fluid is formed into a swirling flow in a fluid passage.

  FIG. 11A shows a conventional nozzle device disclosed in Japanese Patent No. 2582836. This nozzle device includes a cylindrical nozzle body 10, an annular seal member 20, a nozzle tip 30, and an overflow imparting blade 40. In the nozzle body 10, connection means 11 and 12 for a spray fluid source are provided on one end side. An annular seal member 20 is disposed on the back side in the other end side cylinder, and the nozzle tip 30 is detachably connected to the front end thereof with the overflow imparting blades 40 incorporated therein. Then, the fluid flows from the one end side passage portion 14 through the inner hole of the annular seal member 20 between the inner periphery of the enlarged chamber 34 at the nozzle tip 30 and the outer periphery of the overflow imparting blade 40. It turns into a swirl flow through the passage, and is injected in a conical shape from the orifice 36 through the intermediate flow passage 35 and further from the divergent outlet end 38. The nozzle device described above is designed to be quickly disassembled so as to cope with clogging. However, since the nozzle body 10, the annular seal member 20, the nozzle tip 30, and the overflow imparting blade 40 are essential, the number of members is increased. Many are complicated and difficult to reduce costs. As an example of the countermeasure, each nozzle device of FIGS. 11B, 12B, and 13B is simplified because the main member is composed of two or three members.

  FIG. 11B is disclosed in Patent Document 1. This nozzle device includes a cylindrical nozzle body 1 provided with a discharge port (hole) 2 on one end side, and a tip (core, swivel member) 7 incorporated in the cylinder of the nozzle body. Formed between the inner peripheral surface of the nozzle 7 and the outer peripheral surface of the tip 7 and having substantially spiral fluid passages (communication portions) 9a and 9b extending from the other end side of the nozzle body 1 toward the discharge port 2; The fluid introduced into the body is swirled by the fluid passages 9a and 9b and ejected from the discharge port 2. Reference numerals 8a and 8b denote blade-shaped guide members. In this structure, by providing two grooves 6a and 6b intersecting at the discharge port on the end surface on the discharge port side of the nozzle body, the shape in which the fluid is ejected from the discharge port can be formed as a rectangular spray pattern.

  The nozzle device 1c of FIG. 12 is disclosed in Patent Document 2. The nozzle device 1c has a cylindrical nozzle body (spray nozzle) 60 having an orifice-equipped throat 66 on one end side as shown in FIG. 5B, and a connection having an inlet 64 connected to the nozzle body 60. A body 61 and a tip (vane) 62 that is disposed in the connection body 61 and imparts a swirling flow to the cooling water transferred from the inlet 64. In this structure, the cooling water entering the inflow port 64 is converged at the throat portion 66 through the whirling chamber 65 while swirling by the tip 62, and as shown in FIG. Form.

  The nozzle device 9 shown in FIG. 13 is disclosed in Patent Document 3. The nozzle device 9 includes a water supply body 35 that forms a water injection section 34 as shown in FIG. 5B, a circular water diffusion body 36 that diffuses water injected from the water injection section 34 in a radial pattern, and have. The water diffuser 36 has a concave curved upper wall facing the water injection unit 34, and a plurality of support ribs 39 are provided on a column 38 that enters the internal water passage 37 of the water supply 35. ing. In this structure, as shown in (a), the water spray spreads radially toward the outer peripheral portion of the inner surface of the toilet 1 and is poured directly under the rim portion, and flows down while wetting the entire surface along the inner surface inclination.

Japanese Patent No. 4504641 (FIGS. 1 to 4) Japanese Patent No. 3066791 (FIGS. 12 to 14) JP 2013-79578 A (FIGS. 4 to 6)

Although the above-described simplified nozzle device can be easily reduced in cost as compared with the structure of FIG. 11A, it is still unsatisfactory from the following viewpoint.
(1) In the structure shown in FIG. 11B, the nozzle body 1 has a threaded portion 10 on the outer periphery, and is connected to a supply pipe that supplies a fluid as a water supply unit using the threaded portion 10. In the structure of FIG. 12B, the outer periphery of the connection body 61 is used to connect to a supply pipe that supplies a fluid that is a water supply unit. In the structure of FIG. 13B, the upstream side portion of the water supply body 35 is used to connect to a supply pipe that supplies a fluid that is a water supply unit. That is, each nozzle device has a configuration in which the fluid is introduced into the device, and the main portion has a linear shape since the fluid is introduced into the device through an inlet port that is arranged coaxially with the device. For this reason, in the conventional structure, it is difficult to store in the nozzle case 8 compactly as shown in FIG. This is not only complicated, for example, by connecting the connection member to the connection body 61 of FIG. 12B so as to be L-shaped and supplying the flowing water from the water supply unit via the connection member. This is because the fluid enters the inlet side passage as a turbulent flow, and the swirl flow formed by the fluid passage and the ejection pattern from the discharge port are not stable and easily disturbed.

(2) Furthermore, each nozzle device also has problems from the following points. First, in the structure shown in FIG. 11B, for example, a connecting member such as the connection body 61 shown in FIG. In addition, it is difficult to maintain a stable swirl because the configuration in which the fluid is actively branched and introduced from the inlet side passage 3d of the nozzle body into the fluid passages (communication portions) 8a and 8b is lacking.

  Similarly, in the structure of FIG. 12B, since the main member has a three-member configuration of the nozzle body 60, the connection body 61, and the tip 62, there are many constituent members. Further, since the configuration in which the fluid is actively branched and introduced from the inlet 64 of the connection body 61 to each fluid passage of the tip 62 is lacking, it is difficult to maintain a stable turning. Moreover, in the structure of FIG.13 (b), water hits the concave curved surface of the water diffuser 36 from the water injection part 34, and as shown to the broken line of the same (a), it spreads radially toward the peripheral part of the toilet bowl inner surface, It flows down while wetting the entire surface along the inner slope. In short, the state where water is not directly under the water diffuser due to the presence of the water diffuser 36, that is, the spray pattern does not have a full cone shape but tends to have a holocone shape.

  The object of the present invention is to eliminate the above-mentioned problems, maintain simplicity, and make it possible to form a uniform jet pattern reliably by turning the fluid into a swirling flow, or to use it in a nozzle case, for example. In the aspect, design flexibility can be expanded. Further, in terms of versatility, the design change can be minimized and the degree of freedom of the shape of the injection distribution pattern can be expanded as much as possible. Other purposes will be clarified in the following description.

In order to achieve the above object, the present invention can be specified by referring to a form example. A cylindrical nozzle body (1) provided with a discharge port (12) on one end side, and a chip ( 2), a fluid passage formed between an inner peripheral surface of the nozzle body and the tip and extending to the discharge port side of the nozzle body, and a fluid introduced into the nozzle body A nozzle device (3) that injects from the discharge port into a swirling flow through a passage (FP), the nozzle device being assembled to a toilet seat body (7A) for toilet and flushing water or washing water (7) The nozzle body (1) has the discharge port (12) on one end side and a cylindrical portion (10) in which the tip (2) is provided, and the cylindrical portion A hole (19) provided in the periphery and And a connecting portion (17) that allows fluid to be introduced into the cylindrical portion from the hole portion, and the tip (2) is a fluid branching portion provided facing the hole portion (19). (28) and two substantially spiral or arcuate passage grooves (29a, 29b) that partition the tip side of the fluid passage (FP) and that are divided in the left-right direction from the fluid branching portion (28). It is characterized by having.

The present invention as described above is more preferably embodied as specified in claims 2-9.
(A) In claim 1, the cylindrical portion (10) and the connecting portion (17) are connected in a substantially L shape, and the hole portion (19) is more than the passage (18) of the connecting portion. It is the structure currently formed in the small diameter (Claim 2).
(A) In claim 1 or 2, the passage (18) of the connecting portion (17) communicates with the hole portion (19) through a contracted portion (18a) whose inner diameter is gradually reduced. (Claim 3).

(C) In Claims 1 to 3, the inner peripheral surface (11) of the cylindrical portion (10) has a step (11c) that borders the hole (19), and the fluid branching portion is A part thereof is arranged in contact with the inner peripheral surface of the cylindrical portion or the step (claim 4).
(D) In claim 4, the fluid branching portion (28) includes upper and lower or both side projections (18a, 18b) that contact the cylindrical inner peripheral surface (11) or the step (11c), and An intermediate portion (18c) that is formed in between and faces the step (11c) with a gap therebetween (Claim 5).

(E) In Claims 1 to 5, the tip (2) includes a head (20) and a cylindrical shaft portion (25) connected to the head to form the passage groove around the tip (2). The positioning means (4) is positioned with respect to the nozzle body (1), and the head (20) is engaged with the other end (10b) side of the cylindrical portion (10) by the engaging means (5). It is the structure fixed together (Claim 6).
(F) In Claims 1 to 6, the fluid passage (FP) has the discharge port (FP) as shown in FIG. 8 (a) when the passage grooves (29a, 29b) are formed in substantially the same cross-sectional area. 12) The configuration is such that the spray distribution pattern of the fluid sprayed from 12) can be formed in a circular shape.

(G) In claim 1 to claim 6, when the fluid passage (FP) is formed as one of the left and right passage grooves (29a, 29b) with one having a larger cross-sectional area than the other, the fluid passage (FP) shown in FIGS. ), The ejection distribution pattern of the fluid ejected from the ejection port (12) can be formed in a substantially elliptical shape (shifted from the center of the ejection port) (Claim 8).

The invention of claim 1 has the following advantages over the conventional nozzle device described above.
(A) In the present invention, since the main member is the nozzle body and the tip, the simplification can be maintained, and the fluid passage is formed between the cylindrical inner peripheral surface of the nozzle body and the outer peripheral surface of the tip. Since the fluid introduced into the nozzle is swirled and ejected from the discharge port, it is easy to form a full cone shape as the ejection pattern, a circular shape as the ejection distribution pattern, or a similar elliptical shape.
(B) In the present invention, as illustrated in FIG. 3, the nozzle body has a hole provided around the cylindrical portion, and the fluid flowing from the hole is branched into the plurality of fluid passages. It has the fluid branch part which makes it. For this reason, in this nozzle structure, a fluid having a predetermined flow rate can be branched and flowed almost evenly into each fluid passage by the fluid branch portion without increasing the number of members.

(C) In other words, the nozzle body of the present invention can introduce a fluid into the cylinder part by providing a discharge port on one end side and connecting the tip part with a cylinder part around the other end side of the cylinder part. Therefore, the degree of freedom of design can be expanded by arbitrarily setting the connecting angle of the connecting portion with respect to the cylindrical portion. Even in this case, since the nozzle device introduces the fluid from the passage of the connecting portion through the hole of the cylindrical portion, the diameter of the fluid can be reduced simply by making the hole portion smaller in diameter than the passage of the connecting portion as in claim 3. It is possible to satisfactorily branch and flow in such a way that a partial pressure difference is not generated as much as possible from the small hole to the inside of the cylinder and further to each fluid passage.

(D) Further, in the present invention, for example, by replacing the conventional water spray nozzle of FIG. 13, it is possible to inject more accurately toward a predetermined place on the inner surface of the toilet, and more effectively suppress the possibility of filth deposits. Can do.

The invention according to claim 2 can be compactly accommodated in the nozzle case in such a manner as illustrated in FIG. At the same time, in the present invention, as described above, since the hole portion is a small-diameter hole portion whose diameter is smaller than that of the passage of the connection portion, the fluid flows from the hole portion into the cylinder portion and further to the partial pressure with respect to each fluid passage. It is possible to better branch inflow so as not to cause a difference as much as possible.

In the invention of claim 3, as illustrated in FIG. 4, the passage of the connecting portion is communicated with the hole portion through the reduced flow portion whose inner diameter is gradually reduced, so that fluid flows from the hole portion to the reduced flow portion, In addition, the fluid can be controlled to flow into the cylinder portion, and can be branched into the fluid passages at a more uniform pressure and flow rate, whereby the target injection distribution pattern can be formed more accurately.

As shown in FIG. 4, the invention of claim 4 has a step provided on the inner peripheral surface of the cylindrical portion and borders the hole, and a part of the fluid branching portion is in contact with the inner peripheral surface of the cylindrical portion or the step. Since they are arranged in a state, the positional relationship between the fluid branching portion with respect to the hole and each fluid passage can be maintained stably with high accuracy.

In the invention of claim 5, as illustrated in FIG. 4, the fluid branching portion is located between the projections on the upper and lower sides or both sides contacting the inner circumferential surface of the cylindrical portion or the step and the both steps so as to be opposed to each other with a gap in the step. Therefore, it is possible to obtain the advantages described in claims 3 and 4 more reliably only by determining the width and height dimensions of the intermediate portion.

Since the invention of claim 6 has positioning means for positioning the tip on the nozzle body and engagement means for engaging and fixing the tip, the tip is assembled in the cylinder of the nozzle body with a one-touch operation as in the embodiment. This makes it possible to improve the assembly.

In the seventh aspect of the present invention, the right and left fluid passages merely form the passage grooves in substantially the same cross-sectional area, and as shown in FIG. Therefore, the division from the following claim 8 can be clarified.

In the invention of claim 8, the fluid ejected from the discharge port as shown in FIGS. 8 (b) and 8 (c) only by forming the left and right fluid passages with the respective passage grooves having a larger sectional area than the other. Since the jet distribution pattern is substantially elliptical and deviated from the center of the discharge port, the distinction with claim 7 can be clarified.

It is an external appearance perspective view which shows the nozzle apparatus which concerns on a 1st form. 1A and 1B show details of the nozzle device of FIG. 1, wherein FIG. 1A is a top view, FIG. 1B is a rear view, FIG. 1C is a side view, FIG. 1D is a front view, and FIG. 2A is a cross-sectional view taken along the line AA in FIG. 2D, FIG. 2B is a cross-sectional view taken along the line A-A in FIG. It is the A1-A1 sectional view taken on the line of FIG. (A) And (b) is the operation | movement figure which expands and each shows X part of FIG.3 (b), and X1 part of 3 (c), (c) is a cross section similar to FIG.6 (h). It is sectional drawing typically shown in order to make each passage groove | channel easy to understand. The detail of the nozzle main body which comprises the said nozzle apparatus is shown, (a) is a side view, (b) is a front view, (c) is BB sectional drawing of (a), (d) is (b) ) Is a cross-sectional view taken along line C-C in FIG. The details of the chip constituting the nozzle device are shown, (a) is a top view, (b) is a rear view, (c) is a left side view, (d) is a right side view, and (e) is (a) ) Is a cross-sectional view taken along line E-E, (f) is a cross-sectional view taken along line FF of (c), (g) is a cross-sectional view taken along line GG, and (h) is a cross-sectional view taken along line H-H. The usage example which assembled | attached the said nozzle apparatus to the toilet seat main body is shown, (a) is the schematic diagram which shows a partial cross section which looked at the toilet bowl, the toilet seat main body, and the tank for water reservoir from the top, (b) was assembled to the toilet seat main body. It is a schematic diagram which shows the injection distribution pattern of a nozzle apparatus. 7A is a schematic cross-sectional view showing the injection distribution pattern of FIG. 7B corresponding to the line KK, and FIG. 7B is a cross-sectional area of the passage groove B of FIG. FIG. 5C is a schematic cross-sectional view showing the injection distribution pattern corresponding to the line KK, and FIG. 5C is an injection distribution pattern when the cross-sectional area of the passage groove B in FIG. It is a schematic cross section shown corresponding to K line. (A) is a perspective view of the said chip | tip, (b) is a figure which shows the said chip | tip corresponding to the perspective view of (a) as the modification 1. FIG. It is a figure which shows the modification 2 of the said chip | tip and a nozzle main body corresponding to Fig.3 (a). (A) is sectional drawing of the conventional nozzle device disclosed by patent 2582836 gazette, (b) is sectional drawing of the nozzle device disclosed by patent document 1. FIG. (A) is a block diagram which shows the usage example of the nozzle apparatus disclosed by patent document 2, (b) is sectional drawing of the nozzle apparatus. (A) is a block diagram which shows the usage example of the nozzle apparatus disclosed by patent document 3, (b) is sectional drawing of the nozzle apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this description, the configuration shown in FIGS. 1 to 8 and the operation thereof will be described in detail, and then reference will be made to Modification 1 in FIG. 9B and Modification 2 in FIG.

(Mode) The nozzle device 3 includes a cylindrical nozzle body 1 having a discharge port 12 on one end 10a side, and a chip 2 incorporated in the cylinder body of the nozzle body 1. The nozzle body 1 has a substantially spiral or arcuate fluid passage FP formed between the inner peripheral surface 11 and the outer peripheral surface of the chip 2 and extending from the other end 10b side of the nozzle body 1 toward the discharge port 12. The fluid such as water introduced into the cylinder is swirled by the fluid passage FP and can be ejected from the discharge port 12. The nozzle body 1 and the chip 2 are both injection-molded products using synthetic resin, but may be other than resin.

  The contrivance points are the connection part 17 connected to the periphery of the other end 10 b side of the nozzle body 1 so that the target fluid can be introduced into the cylinder of the nozzle body 1, and the other end of the nozzle body 1 corresponding to the connection part 17. A small-diameter hole portion 19 provided around the 10b side, passage grooves 29a and 29b provided around the tip 2 and defining the tip side of the fluid passage FR, and a small-diameter hole provided in the tip 2. The fluid branching section 28 is provided to allow the fluid flowing in from the section 19 to branch into each fluid passage FP. These details will be clarified below.

  Here, the nozzle body 1 is substantially L-shaped, and integrally forms a cylindrical tube portion 10 and a connecting portion 17 connected to the tube portion 10 at a substantially right angle. The connecting portion 17 forms a passage 18 that enables the target fluid to be supplied into the cylindrical portion 10. The connection portion 17 is provided with a plurality of circular claws 17a that are difficult to come off when inserted into the supply pipe 9. In addition, as the supply pipe | tube 9, a pipe, a hose, piping, and those similar to them are used.

  The outer periphery of the cylindrical portion 10 has a plurality of engaging projections 14 which are restricting protrusions 13 and one of the attaching means on one end 10a side, and the other end 10b side receives the head 20 of the chip 2. And a recess 16 for positioning the chip 2. The inner peripheral surface 11 of the cylindrical portion 10 has a discharge port 12 along which the one end 10a side extends along the central axis, and a reduced flow portion 11a whose diameter is gradually reduced toward the discharge port 12, and the other end 10b side is the head of the chip 2. 20 and a large diameter portion 11b for receiving the neck portion 26 and a shallow step 11c centered on the small diameter hole portion 19.

  That is, the restricting protrusion 13 protrudes around the one end 10a. Each engagement piece 14 protrudes substantially in the shape of the periphery of the one end 10a side, and a portion between the top portion 14a and the bottom end that protrudes to the maximum is a pressure contact portion, and can be elastically reduced in diameter due to the presence of the inner gap 14b. ing. Then, the restricting protrusion 13 and the engaging piece 14 are in a state where one end side including the restricting protrusion 13 side is inserted into the attachment hole 8b provided in the attachment plate portion 8a as inferred from FIGS. 1 and 7B. The upper and lower surfaces of the mounting plate portion 8a are held between the restricting protrusion 13 and the engaging piece 14 so that the mounting plate portion 8a can hold the mounting plate portion 8a. Note that the mounting plate portion 8a is a part of the nozzle case 8 that houses a main portion of the nozzle device 1 as shown in FIG.

  As shown in FIGS. 2 and 3, each piece 15 has an inner diameter 15 a that fits the head 20 of the chip, and can be swung by a vertical slit 15 b provided therebetween. . An engagement hole 15 c is formed through the center of each piece 15. Each engagement hole 15 c engages with a corresponding protrusion 24 provided around the head 20.

  The discharge port 12 is an orifice through which a fluid flows out, and includes a round hole 12a having a minimum diameter on the back side and an inclined enlarged hole 12b that is a divergent outer side. The injection angle θ is arbitrary, but is usually set to about 50 to 120 degrees. The contracted portion 11a guides the fluid to the discharge port 12 so as to be compressed or contracted in a state where the fluid is formed in a swirl flow by the fluid passage FP as shown in FIG. Note that reference numeral 10c denotes a tip protruding portion that protrudes so as to border the tip end side of the inclined enlarged hole 12b with respect to the end face of the one end 10a.

  The passage 18 of the connecting portion 17 is connected to the small-diameter hole portion 19 via a contracted portion 18 a that gradually decreases in diameter toward the small-diameter hole portion 19. The small-diameter hole portion 19 is provided smaller than the inner diameters of the passage 18 and the cylindrical portion 10. The step 11c may be omitted, but is a portion facing a fluid branching portion 28 of the chip 2 described later, so that fluid can be smoothly introduced into the cylindrical portion 10 from the small-diameter hole portion 19 This is useful for preventing clogging.

  On the other hand, the chip 2 includes a head portion 20 and a shaft portion 25 protruding from the end face of the head portion 20 as shown in FIGS. A hole 21 provided and extending in the central axis direction, a hole 22 having a smaller diameter than the hole 21, and a hole 22 a having a smaller diameter than the hole 22 are provided. The chip 2 is lightened by the holes 21, 22, and 22a. Around the head 20, a projection 24 that can be engaged with the engagement hole 15 c and a positioning projection 23 that can be fitted into the recess 16 are provided.

  The shaft portion 25 is provided in a neck portion 26 provided on the lower side of the head portion 20, a flange portion 27 provided on the lower side of the neck portion 26, and a shaft portion on the lower side of the flange portion 27, and the fluid passage FP. The passage grooves 29a and 29b and the fluid branching portion 28 to be divided and the substantially V-shaped end faces 25a and 25a are integrally provided.

  A seal ring R is attached to the neck portion 26. As shown in FIG. 3, the seal ring R is positioned between the head portion 20 and the collar portion 27, and is pressed against the corresponding inner periphery of the large diameter portion 11b of the nozzle body to thereby increase the diameter of the seal ring R. The portion 11b can be sealed. In other words, the seal ring R has a liquid between the shaft portion 25 and the large-diameter portion 11b even if the fluid flows into the cylindrical portion 10 through the passage 18, the contracted portion 18a, and the small-diameter hole portion 19 with a predetermined pressure. Prevent leaks.

  The fluid branch portion 28 is provided at a location where the passage grooves 29a and 29b intersect with each other, and includes a vertical projection 28a and 28b and an intermediate portion 28c between the projections 28a and 28b. The upper and lower protrusions 28a and 28b abut against the step 11c or the inner peripheral surface 11 as shown in FIG. 3B, and guide the flowing fluid into the left and right passage grooves 29a and 29b. The protrusions 28a and 28b may be only one or both. The intermediate portion 28c is preferably formed lower than the protrusions 28a and 28b and is opposed to the substantially center with a gap with respect to the small-diameter hole portion 19, and may be a flat shape or a gentle mountain shape.

  The passage groove 29 a and the passage groove 29 b are provided around the shaft portion below the flange portion 27 of the shaft portion 25, and are formed in a substantially spiral shape or an arc shape from the fluid branch portion 28 to the corresponding front end surface 25 a. Yes. In other words, the passage groove 29a is generally spiral or arcuate with the upper side connected to the fluid branching portion 28 and the lower side connected to the one end face 25a. The passage groove 29b has a substantially spiral or arcuate shape with the upper end connected to the fluid branching portion 28 and the lower end connected to the other end face 25a.

(Operation) The main operation characteristics of the nozzle device 3 will be described below.
(1) In the assembly operation, the seal ring R is mounted on the tip 2 and then inserted into the nozzle body 1 from the shaft portion 25 of the tip. During the insertion, the tip 2 is positioned with respect to the nozzle body 1 so that the convex portion 23 is fitted into the concave portion 16. From this state, the chip 2 is fixed when pushed further. That is, the chip 2 includes the fitting of the head 20 to the inner diameter 15a of each piece, the engagement of the protrusions 24 to the plurality of engagement holes 15c, the fitting of the projection 23 to the recess 16, and the large diameter portion 11b. Is positioned and fixed with respect to the nozzle body 1 with high accuracy. In this assembled state, the small-diameter hole portion 19 is disposed opposite to the upper and lower protrusions 28a and 28b and the intermediate portion 28c constituting the fluid branching portion 28 of the chip as shown in FIG.

(2) FIG. 7 schematically shows a usage example of the nozzle device 3 described above. For example, the nozzle device 3 is accommodated in the nozzle case 8 and is held by the holding structure of the above-described restriction protrusion 13 and the engagement piece 14 with respect to the mounting plate portion 8a constituting the nozzle case 8. As an example, when the nozzle device 3 is used in the toilet bowl 7 as shown in FIG. 5A, the nozzle case 8 is disposed on the lower surface front side of the toilet seat body 7A. A corresponding end of the supply pipe 9 is connected to the connection portion 17, and a fluid such as water is supplied from the supply pipe 9 to the passage 18 at a predetermined pressure.

(3) In the nozzle device 3 described above, fluid such as water is supplied to the passage 18 of the connecting portion via the supply pipe 9. Then, a fluid such as water is transferred into the cylindrical portion 10 through the small-diameter hole portion 19 while being contracted to the design value by the upstream contracted portion 18 a in the passage 18. Thereafter, the fluid that has entered the cylindrical portion 10 is caused by the presence of the fluid branching portion 28 facing the small-diameter hole portion 19, that is, the upper and lower protrusions 28a and 28b and the intermediate portion 28c. As shown in FIG. 4, a fluid passage FP (hereinafter, abbreviated as a fluid passage FR including the passage groove 29a) defined between the passage groove 29a and the inner peripheral surface 11 of the tubular portion, the passage groove 29b and the tubular portion. Is branched into a fluid passage FP (hereinafter, abbreviated as a fluid passage FR including a passage groove 29b) partitioned between the inner peripheral surface 11 and the inner peripheral surface 11.

(4) In other words, a fluid such as water that has entered the cylinder portion 10 from the small-diameter hole portion 19 and the fluid passage FP including the passage groove 29a by the fluid branching portion 28 facing the small-diameter hole portion 19 The fluid channel FP including the channel groove 29b is almost equally divided into two. 4A and 4B, the fluid passage FP including the passage groove 29b is located on the upper side of the paper surface in (a), and is located on the lower side of the paper surface in (b). The fluid passage FP including the passage groove 29a is located below the paper surface in (a), and is located above the paper surface in (b). In this example, the flow from the small-diameter hole portion 19 into the cylindrical portion 10 is indicated by a solid line as the flow of fluid such as water. As a flow after branching by the fluid branch portion 28, in (a), the flow of the fluid passage FP including the passage groove 29b is indicated by a solid line, and the flow of the fluid passage FR (not shown) including the passage groove 29a on the lower side of the drawing is indicated by a broken line. Is shown. On the other hand, in (b), the flow of the fluid passage FP including the passage groove 29a is indicated by a solid line, and the flow of the fluid passage FR (not shown) including the passage groove 29b on the lower side of the drawing is indicated by a broken line.

  In other words, in this example, the fluid such as water entering the cylinder portion 10 is divided into two equal parts, the fluid passage FP including the passage groove 29a and the fluid passage FP including the passage groove 29b. Further, the swirl flow formed from the fluid passage FP to the discharge port 12 (the round hole 12a) can be brought close to the designed pattern. As a result, the nozzle device 3 can maintain a good injection distribution pattern as exemplified in FIGS. 7 and 8, and can maintain the injection angle θ and the injection distance at values as designed. This operation means that the injection distribution pattern can eliminate or alleviate problems such as disturbance of uniformity that is likely to occur in the conventional nozzle device, generation of streaks, and partial deviation.

(5) By the way, the present inventors have found the following configuration from various tests in the nozzle device 3 described above. That is, when the nozzle device 3 is used as shown in FIG. 7, the spray distribution pattern is such that the passage grooves 29a and 29b have the same cross-sectional area, that is, A = B, and the discharge port 12 is centered as shown in FIG. It becomes a round shape. Further, when the cross-sectional area A of the passage groove 29a is smaller than the cross-sectional area B of the passage groove 29b, that is, A <B, an ellipse whose center is shifted to the tank side as shown in FIG. On the other hand, when the cross-sectional area A of the passage groove 29a is larger than the cross-sectional area B of the passage groove 29b, that is, A> B, an ellipse whose center is shifted toward the toilet front as shown in FIG.

  As illustrated in FIG. 7A, such a phenomenon is suitable when a fluid such as water is to be sprayed uniformly to a specific predetermined location in an application apparatus or equipment. That is, in the example of the figure, when the inner shape of the toilet bowl is variously changed according to the specification, the injection distribution pattern is also changed to an ellipse indicated by a dashed line in the figure slightly shifted to the tank 7A side, It may happen that the ellipse indicated by the two-dot chain line in FIG. In such a case, the time and cost have been increased because the test has been satisfied repeatedly by changing the shape of the chip and the shape of the passage groove each time. However, in this nozzle device 3, the right and left fluid passages FP are formed such that each of the passage grooves 29 a and 29 b has a larger sectional area than the other, as shown in FIGS. 8B and 8C. Since the fluid ejection distribution pattern is substantially elliptical with a deviation from the center of the discharge port 12, it can be dealt with quickly and the design can be simplified.

(Modification 1) FIG. 9A is a perspective view of the chip 2 described above. The same (b) shows a modification of the chip 2 in the same manner as the same (a). In the description of the first modification, the same or similar parts as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted as much as possible.

  The modified example 1 in FIG. 5B is an example in which the lengths of the passage grooves 29a and 29b provided in the shaft portion 25 are extended as compared with FIG. That is, the passage groove 29a has an upper end connected to the fluid branching portion 28 and a lower end that extends to the lower portion of the lower protrusion 28b by changing the shape of the corresponding lower end surface 25a. Reference numeral 25b denotes a lower edge portion which is formed as an extension and borders the lower side of the passage groove 29a. Similarly, the upper end of the passage groove 29b is connected to the fluid branch portion 28, and the lower end thereof is further extended downward by changing the shape of the corresponding lower end surface 25a. Reference numeral 25c denotes a lower edge portion which is formed as an extension and borders the lower side of the passage groove 29b.

  In the first modification, in particular, by changing the lengths of the passage grooves 29a and 29b, and thus the above-described cross-sectional area, the injection distribution pattern of FIG. 8A is changed from a circular shape to, for example, FIG. 8B. And (c) can be changed to an elliptical shape or the like in which the injection center is shifted.

(Modification 2) FIG. 10 shows an example in which a sealing flange 26a is formed integrally with the chip 2 in place of the sealing ring R described above. In the description of the modified example 2, the same or similar parts as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted as much as possible.

  In FIG. 10, the chip 2 includes a head portion 20 and a shaft portion 25 protruding from the end surface of the head portion 20. The shaft portion 25 has a neck portion 26a located on the lower side of the head portion 20, and the neck portion 26a is formed to have a smaller diameter than the neck portion 26 of the first form. The neck portion 26a is integrally formed with upper and lower sealing flanges 26b and 26b.

  Each flange portion 26b is capable of sealing between the neck portion 26a and the large-diameter portion 11b by press-contacting to the corresponding inner circumference of the large-diameter portion 11b of the nozzle body, so that the fluid can be sealed between the passage 18, the contracted portion 18 a, the diameter. Even if it flows into the cylinder part 10 through the small hole part 19 with a predetermined pressure, the liquid leakage between the shaft part 25 and the large diameter part 11b is prevented. Thus, in the second modification, the number of parts and the number of assembly steps can be reduced while maintaining the quality as compared with the first embodiment. In the second modification, the passage groove 29a (not shown) and the passage groove 29b have the same configuration as in the first modification. The injection angle θ1 is larger than that in the first embodiment.

  As described above, the nozzle device of the present invention only needs to have the configuration specified in each claim, and the details can be further changed or developed with reference to this form and modification. As an example, the engagement structure of the engagement hole 15c and the protrusion 24 can be changed to other engagement means as necessary. The mounting structure fixed to the mounting plate portion 8a can be arbitrarily changed. The application is suitable also when injecting liquids such as gas, water, cleaning liquid and chemicals, and fluids, and the application apparatus and devices can be applied to anything other than the toilet seat body.

1 .... Nozzle body (10 is a cylinder part, 11a is a contraction part)
2 ... Tip (20 is head, 25 is shaft)
3 .... Nozzle device 4 .... Positioning means (16 is a concave portion for positioning, 23 is a convex portion)
5... Engaging means (15c is engaged portion or engaging hole, 24 is engaging portion or protrusion)
7. Toilet (7A is the toilet seat)
8... Nozzle case 9... Supply pipe 11... Inner peripheral surface (11 a is a contraction portion, 11 b is a large diameter portion, and 11 c is a step)
12 .... Discharge port (12a is a round hole, 12b is an inclined enlarged hole)
15c ... engagement hole (engaged part)
17 ··· Connection 18 ··· Passage (18a is the contraction)
19 ··· Small diameter hole (hole)
28... Fluid branch (28a and 28b are upper and lower protrusions, 28c is an intermediate part)
29a ... passage groove 29b ... passage groove FP ... fluid passage

Claims (8)

A cylindrical nozzle body provided with a discharge port on one end side, and a chip incorporated in the nozzle body, and formed between an inner peripheral surface of the nozzle body and the chip, the nozzle body A nozzle device having a fluid passage extending toward the discharge port side, wherein the fluid introduced into the nozzle body is swirled by the fluid passage and ejected from the discharge port;
The nozzle device is assembled to a toilet seat body for a toilet and injects water or washing water into the toilet,
The nozzle body has the discharge port on one end side, and has a cylindrical portion in which the chip is installed, a hole provided around the cylindrical portion, and a fluid connected to the periphery from the hole to the cylinder. Having a connecting part that can be introduced into the part,
The tip is divided into a fluid branching portion provided opposite to the hole, and two substantially spiral or arcuate shapes that partition and form the tip side of the fluid passage and are separated from the fluid branching portion in the left-right direction. A nozzle device comprising a passage groove.   The nozzle device according to claim 1, wherein the cylindrical portion and the connecting portion are integrally formed in a substantially L shape.   The hole is formed smaller in diameter than the passage of the connecting portion, and the passage of the connecting portion is communicated with the hole through a contracted portion having an inner diameter gradually reduced. The nozzle device according to claim 1 or 2.   The inner peripheral surface of the cylindrical portion has a step that borders the hole portion, and the fluid branching portion is disposed in a state where a part thereof is in contact with the inner peripheral surface of the cylindrical portion or the step. The nozzle device according to claim 1, wherein the nozzle device is characterized in that   The fluid branching portion is an inner peripheral surface of the cylindrical portion or upper and lower or both-side protrusions that are in contact with the step, and an intermediate portion that is formed lower than both protrusions between the two protrusions and faces the step with a gap. The nozzle device according to claim 4, comprising:   The tip includes a head and a substantially cylindrical shaft portion connected to the head and forming the passage groove around the head. The tip is positioned by positioning means with respect to the nozzle body, and the head is The nozzle device according to claim 1, wherein the nozzle device is engaged and fixed to the other end side of the cylindrical portion by an engaging means.   7. The fluid passage according to claim 1, wherein when the passage grooves are formed to have substantially the same cross-sectional area, an ejection distribution pattern of fluid ejected from the discharge port can be formed in a circular shape. Nozzle device according to.   The fluid distribution path is characterized in that when one of the left and right passage grooves is formed to have a larger cross-sectional area than the other, an ejection distribution pattern of fluid ejected from the discharge port can be formed in a substantially elliptical shape. The nozzle device according to any one of 1 to 6.

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