JP2012192849A - Washer nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer nozzle constituted of a simple nozzle of a structure having a self-excited oscillation flow passage.SOLUTION: The nozzle 14 is formed in a spherical shape at an outer surface and rotatably installed by being pressed in an injection part 13 formed at a nozzle body 12, and an action chamber 23 of a specific height in the vertical direction of becoming the oscillation flow passage is formed inside. The action chamber 23 is formed in a rectangular shape at a specific width, and a jetting hole 26 for supplying a cleaning liquid is formed in a central part on the innermost side, and an outlet becomes a nozzle port 25 of expansively opening outward. An upper wall for forming the action chamber 23 forms eaves 27 by projecting outward from the nozzle port 25, presses down a diffusing flow of injecting outward from the nozzle port 25 from the upper side, narrows a range in the vertical direction of the diffusing flow, and performs the function of flattering the diffusing flow.

Description

The present invention relates to a washer nozzle for injecting a cleaning liquid onto a windshield such as a windshield of a vehicle.
In addition, the up-down direction in this invention shows the same direction as the up-down direction of a vehicle.

  As a washer nozzle for injecting a cleaning liquid onto a windshield of a vehicle, a so-called fluidic disc type nozzle is known in which the cleaning liquid is diffused in the vehicle width direction and sprayed onto a windshield or the like (Patent Document 1). These types of nozzles generally have a nozzle tip having a self-excited oscillation channel formed therein.

  This nozzle chip is usually a molded product of resin, and is divided and molded and then assembled to the nozzle body. However, a resin nozzle chip in which a self-excited oscillation channel is integrally formed is also known. As disclosed in Patent Document 2, as shown in FIG. 1, a self-excited oscillation flow path is integrally formed in a nozzle body 1 corresponding to a nozzle chip. As shown in FIGS. 2 and 3, the nozzle body 1 is mounted by being pushed into a nozzle support 2. The nozzle support 2 has a spherical outer surface and constitutes a nozzle 3 together with the nozzle body 1. The nozzle 3 is a nozzle body. 4 is press-fitted into a spherical portion formed on the back side of the injection portion and is rotatably attached.

JP-B 63-57641 JP 2006-89025 A

  The washer nozzle disclosed in Patent Document 2 is capable of adjusting the spray angle of the cleaning liquid sprayed while vibrating from the nozzle 3 a of the nozzle 3 by rotating the nozzle 3. All the nozzles 1 are injected from the nozzle 3a through the nozzle body 1 without leaking from the support 2 and the nozzle body 1 is an integrally molded product and has an advantage that the number of parts is smaller than that of the divided type.

  An object of the present invention is to provide a washer nozzle having a simpler structure by reducing the number of parts compared to a conventional nozzle.

  The invention according to claim 1 is a washer nozzle comprising a nozzle body and a nozzle mounted on the nozzle body, and the nozzle is made of a hard resin such as polybutylene terephthalate PBT or polyamide, and the nozzle is self-excited inside. A oscillating flow path comprising a hollow working chamber having a fixed height in the vertical direction that forms a nozzle opening on one side, and a jet hole opening in the center on the back side of the working chamber, from the jet hole to the working chamber The cleaning liquid supplied under pressure is diffused and injected in the vehicle width direction from the nozzle.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the outlet is formed such that the outlet is expanded outward,
The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the upper wall forming the working chamber extends from the nozzle and forms a ridge protruding outward.

  According to the first aspect of the present invention, the nozzle forms a working chamber that forms an oscillation channel therein, and is formed as a single unit, thereby simplifying the structure of the washer nozzle. The conventional nozzle shown in FIG. In the nozzle body 1, in order to form the oscillation channel without undercutting, it is necessary to provide a plurality of slide molds in the mold, and slide each mold in the direction of the arrow in FIG. Although the structure of the mold becomes complicated, in the invention according to claim 1, the working chamber can be formed without undercutting with a mold having one slide mold, and the structure of the mold is simplified. It has the effect of being able to do.

  According to the second aspect of the present invention, the diffusion angle of the cleaning liquid sprayed from the nozzle can be expanded, and the cleaning liquid can be sprayed over a wide range.

  According to the invention relating to claim 3, it is possible to suppress the cleaning liquid from diffusing in the vertical direction by the wrinkles, narrow the range of the diffusing flow in the vertical direction, and flatten the diffusing flow.

Sectional drawing which shows the prior art example of an oscillation flow path. The disassembled perspective view of the conventional washer nozzle. FIG. The cross section of the washer nozzle of this embodiment. AA line sectional view of Drawing 4. The figure which shows the size of a working chamber. The figure which shows the dimension at the time of measuring a diffusion angle. The line graph which shows the spreading | diffusion angle of the washing | cleaning liquid when changing a hole position. The line graph which shows the spreading | diffusion angle of the washing | cleaning liquid when changing the width | variety of a working chamber. A line graph of the cleaning liquid when the expanse angle of the nozzle is changed. A line graph of the cleaning liquid when the pore size is changed. The line graph which shows the spreading | diffusion angle of the washing | cleaning liquid when changing the depth of a working chamber.

Hereinafter, a washer nozzle according to an embodiment of the present invention will be described with reference to the drawings.
4 shows a longitudinal cross section of the washer nozzle 11 and FIG. 5 shows a cross section taken along the line AA of FIG. The nozzle body 12 is press-fitted into the injection portion 13 that is narrowed toward the injection portion and is mounted on the back side of the injection portion. The nozzle body 12 and the nozzle 14 will be described in detail below.

  The nozzle body 12 is formed of a mounting portion 16 that is screwed and attached to the body side of the vehicle, and a head 17 that is integrally formed on the mounting portion, and a hollow portion 18 that serves as a flow path is formed in the mounting portion 16. It is formed in the vertical direction, and is narrowed toward the spherical mounting portion 19 formed on the back side of the head 17, and communicates with the injection portion 13 that opens to the mounting portion 19, the mounting portion 19, and the hollow portion 18. The flow path 21 is provided.

  The nozzle 14 has a spherical outer surface, is press-fitted from the injection unit 13 and is mounted on the mounting unit 19 so as to be rotatable. A working chamber 23 having a constant height is formed in the vertical direction inside the nozzle 14, and the back side. In the upper and lower sides, a cut groove 24 cut into a cylindrical shape at the tip toward the center is formed symmetrically.

  As shown in FIG. 5, the working chamber 23 has a fixed width, a rectangular shape, a fixed height in the vertical direction, and a nozzle hole 25 whose outlet is expanded outward. A jet hole 26 that communicates with the lower cut groove 24 of the cut grooves 24 is formed in the center portion on the back side, and the cleaning liquid supplied to the working chamber 23 from the hollow portion 18 through the blow holes 26 is The self-excited oscillation is generated in the working chamber and is jetted as a diffused flow from the nozzle 25.

  The upper wall forming the working chamber 23 extends from the nozzle 25 and forms a flange 27 protruding outward from the working chamber. The rotation of the nozzle 14 mounted on the mounting portion 19 is performed within a range until the flange 27 hits the injection portion 13. Therefore, the injection port 25 always faces the inside of the injection portion within the rotation range of the nozzle 14. It is. As described above, the rod 27 functions as a stopper when the nozzle 14 is rotated, suppresses the diffusion flow injected outward from the nozzle 25 from the upper side, narrows the vertical range of the diffusion flow, and reduces the diffusion flow. It is designed to perform a flattening function.

  According to the washer nozzle 11 of the present embodiment, the nozzle 14 is a single body, the working chamber 23 is formed inside, the structure is simple, and the spray angle of the cleaning liquid sprayed from the nozzle 11 by rotating the nozzle 14 In the conventional nozzle body shown in FIG. 1, in order to form the oscillation channel without undercutting, a plurality of slide molds are provided in the mold, and each slide mold is in the direction of the arrow in FIG. The nozzle structure of the present embodiment is complicated by sliding the slide mold in one direction with a mold having a single slide mold. By pulling leftward in FIG. 5), the working chamber 23 can be formed without undercutting, the mold structure can be simplified, and the cleaning liquid The spreading angle can be widened, the vertical diffusion of the cleaning liquid is suppressed by the flange 27, the vertical range of the diffusion flow can be narrowed to flatten the diffusion flow, and the rotation range of the nozzle 14 is , And the effect that the mouth 25 can be always kept in the injection part.

  The width b of the working chamber 23 shown in FIG. 6 is 4 mm, the depth c is 5.3 mm, the hole diameter d is 1.2 mm, the expansion angle θ of the nozzle 25 is 45 °, and the hole position a is 0.6 to 2.4 mm. Using the various nozzles 14 changed to the above, tap water was sprayed from the nozzles 14 to a board 28 (see FIG. 7) on which paper was pasted and vertically leaned at a location 400 mm away from the nozzles 14.

  When the tap water is jetted from the nozzle 14, the diffusion flow is photographed with a camera capable of slow reproduction from above, and is slowly regenerated and visually observed. As with the conventional fluid disc type nozzle, a undulating diffusion flow is obtained. The maximum wet length l in the x direction in FIG. 7 is measured with a scale for the wet portion of the paper, and the measured value and the distance from the nozzle 14 to the board 28 are 400 mm in the x direction. Obtain the diffusion angle α. When such measurement was performed one after another by changing the paper from No. 1 to No. 7, the diffusion angle α in the x direction was as shown in Table 1 and FIG. From this result, the larger the hole position a, the larger the diffusion angle in the x direction from the nozzle 14, but it was recognized that the flow rate tends to concentrate on both sides.

Similarly, in the y direction, the maximum wetting length in the y direction is measured from the wetted portion of the paper (No. 1 to No. 7), and the measured value and the distance between the nozzle 14 and the board 28 are 400 mm from the y direction. The diffusion angle of was determined. The results are shown in Table 1 below and FIG. From this result, the diffusion angle in the y direction from the nozzle 14 was the smallest at the hole position of 1.5 mm, and the wet portion was flattened. In FIG. 8, the solid line indicates the diffusion angle in the x direction, and the dotted line indicates the diffusion angle in the y direction. The same applies to the following embodiments.

  Except for changing the hole position a to 1.5 mm and changing the width b of the working chamber 23 to 3.1 to 4.9 mm, the nozzle 14 having the working chamber 23 of the same size as that of the first embodiment is used. Similarly, tap water was sprayed from the nozzle 14 onto the board 28 to which paper was affixed, and then the diffusion angles in the x and y directions were determined from the wetted portion of the paper by the same method as in Example 1. As shown in No. 8 to No. 14, this measurement was performed by changing the paper each time using a nozzle in which the width b of the working chamber 23 was changed to 3.1 to 4.1 mm. The diffusion angles in the x and y directions were determined. The results are shown in Table 2 below and FIG. As can be seen in Table 2 and FIG. 9, the diffusion angle α of tap water from the nozzle 14 is maximized when the width b of the working chamber is 4 mm, and the diffusion angle in the y direction is also minimized with the width b being flattened. did.

  Paper is used in the same manner as in Example 1 except that the nozzle position 14 is the same as that in Example 1 except that the hole position a is 1.5 mm and the expansion angle θ of the nozzle hole 25 is changed to 10 to 50 °. After the tap water was sprayed from the nozzle 14 onto the board 28 to which the water was adhered, the diffusion angles in the x direction and the y direction were determined from the wetted portion of the paper by the same method as in Example 1. As shown in No. 15 to No. 20, this measurement is performed by changing the paper each time using a nozzle in which the expansion angle θ of the nozzle 25 is changed to 10 to 50 °. The diffusion angle was determined. The results are shown in Table 3 below and FIG. As can be seen in Table 3 and FIG. 10, the diffusion angle α in the x direction from the tap water nozzle 14 spreads in the range of 25 to 45 °, and the diffusion angle in the y direction was the lowest at 45 °.

  Using the nozzle 14 provided with the working chamber 23 of the same size as in Example 1 except that the hole position a is 1.5 mm and the hole diameter d is changed to 0.8 to 1.8 mm, paper is applied in the same manner as in Example 1. After tap water was jetted from the nozzle 14 onto the pasted board 28, the diffusion angles in the x and y directions were determined from the wetted portion of the paper by the same method as in Example 1. As shown in No. 21 to No. 26, this measurement is performed by changing the paper each time using a nozzle whose hole diameter d is changed to 0.8 to 1.8 mm, and diffusing in each of the x and y directions. The angle was determined. The results are shown in Table 4 below and FIG. As shown in Table 4 and FIG. 11, the diffusion angle α in the x direction of the cleaning liquid becomes substantially constant when the hole diameter is 1.2 mm or more, and the diffusion angle in the y direction becomes larger as the hole diameter becomes larger.

  The hole position a is selected from Example 1 to be 1.5 mm where the uneven distribution of the flow rate is relatively small and the diffusion angle in the y direction is small, and the width b is the maximum diffusion angle α in the x direction from Example 2, and The diffusion angle in the y direction is 4 mm, the expansion angle θ of the nozzle 25 is 45 ° of the maximum diffusion angle α in the x direction from the third embodiment, and the hole diameter d is the diffusion angle in the x direction from the fourth embodiment. Using a nozzle 14 in which α is the maximum range of 1.2 mm and the depth c is changed to 4.4 to 6. 2 mm, the water is supplied from the nozzle 14 to the board 28 on which paper is pasted in the same manner as in the first embodiment. After injecting water, the diffusion angles in the x and y directions were determined from the wetted portion of the paper by the same method as in Example 1. As shown in No. 27 to No. 34 in this measurement, the diffusion angles in the x direction and the y direction are obtained by the same method as in Example 1 for the nozzles whose depth c is changed from 4.4 to 6. 2 mm. It was. The results are shown in Table 5 below and FIG. As shown in Table 5 and FIG. 12, the diffusion angle α in the x direction of tap water was maximum when the depth e was 4.4 mm, and the diffusion angle in the y direction was relatively small and flattened.

  From the above results, the hole position a shown in FIG. 6 is 1.5 mm, the width b of the working chamber 23 is 4 mm, the expansion angle θ of the nozzle 25 is 45 °, the hole diameter d is 1.2 mm, and the flow rate distribution of the cleaning liquid is constant. In addition, the diffusion angle α in the x direction is widest and the diffusion flow is flattened.

11. · Washer nozzle 12 · · nozzle body 13 · · injection portion 14 · · nozzle 16 · · mounting portion 17 · · head 18 · hollow portion 19 · · mounting portion 21 · · channel 23 · · working chamber 24 · · · Cut groove 25 ・ ・ Pump 26 ・ ・ Blowout hole 27 ・ ・ ・ 28 ・ ・ Board

Claims (3)

  The washer nozzle is composed of a nozzle body and a nozzle attached to the nozzle body, and the nozzle is made of a hard resin. The nozzle forms a self-excited oscillation channel inside, and forms a nozzle opening on one side in a vertical direction. A hollow working chamber having a fixed height and a jet hole opening in the central portion on the back side of the working chamber are provided, and the cleaning liquid supplied by being pressurized from the jet hole into the working chamber diffuses in the vehicle width direction from the jet hole. Washer nozzle, characterized by being sprayed as   The washer nozzle according to claim 1, wherein an outlet of the nozzle is formed to expand outward.   The washer nozzle according to claim 1 or 2, wherein an upper wall forming the working chamber forms a ridge extending outward from the nozzle and projecting outward.