JPS6115983Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a new nozzle, in particular, the jet direction can be easily adjusted, the jet direction does not go awry during use, and the structure is simple and easy to manufacture. The present invention aims to provide a new nozzle that is

It is desirable for the nozzle to be able to easily adjust its spray direction, but on the other hand, if the nozzle's spray direction is distorted due to vibration or repulsive force generated when spraying cleaning liquid, it is more inconvenient in use. It's just that.

Furthermore, considering the case where the device is used in large quantities, such as in automobile windshields and headlamp cleaning nozzles, it is desirable that the structure be simple enough to be suitable for mass production. The present invention has been developed with these points in mind. A spherical body made of synthetic resin is provided with a nozzle opening that penetrates it back and forth, and an appropriate number of nozzle openings are provided around the nozzle opening approximately parallel to the nozzle opening. A bottomed hole is drilled to form the nozzle body, a holding hole with an inner diameter slightly smaller than the diameter of the nozzle body is bored in the nozzle housing, the nozzle body is press-fitted, and the nozzle body is elastically held in the nozzle housing. The details thereof will be explained below based on the embodiments shown in the accompanying drawings.

In the figure, 1 is the nozzle body. The nozzle body 1 is made of synthetic resin, and has a flow path 2 formed from one side of the spherical body, and a nozzle outlet 3 having a smaller diameter than the flow path 2 from the other side so as to communicate the flow path 2 with the outside.
A nozzle opening is formed by the flow path 2 and the nozzle outlet 3. Furthermore, bottomed holes 4, 4, . . . are bored around the nozzle outlet 3, surrounding the outlet 3 and parallel to the flow path 2.

The cross-sectional shape of the bottomed hole retainers 4, 4, . The bottomed holes 4, 4, . . . are bored in the shape of a shape, and the boundary portions 6, 6, .

Reference numeral 7 denotes a nozzle housing, on one side of which a connecting pipe 8 is connected to a cleaning liquid pressure feeding means such as a pump;
On the other hand, a cylindrical part 10 having a holding hole 9 into which the nozzle body 1 is fitted is formed, and these parts are integrally molded of synthetic resin, and in particular, the inner wall surface of the holding hole 9 is made to have appropriate elasticity. is taken into consideration. Further, an inwardly protruding step portion 11 is formed at a position that continues from the holding hole 9 and is located at an appropriate depth from the tip, and as a matter of course, this cylindrical portion 10 and the connecting tube 8 are in communication with each other on the inside. I'm being forced to do it. The nozzle main body 1 fitted into the holding hole 9 has a substantially spherical outer shape, so that the direction of the nozzle outlet 3 can be freely changed within the holding hole 9, and the nozzle main body 1 and the inner wall of the holding hole 9 can be in close contact with each other. However, in this case,
If the fit is too loose, the nozzle outlet 3 will be oriented incorrectly due to vibrations and repulsive force generated during spraying of cleaning liquid. The tighter the fit with 9, the better.

In the nozzle of the present invention, as described above, the bottomed holes 4, 4, . With this configuration, the nozzle body 1 is firmly and elastically fitted into the holding hole 9 of the nozzle housing 7.

Reference numeral 13 denotes a spinner element, which is press-fitted and fixed into the flow path 2 of the nozzle body 1. The spinner element 13 is made of synthetic resin, and has a central hole 14 that is coaxial with the nozzle outlet 3 of the nozzle body 1 and has a smaller diameter than the nozzle outlet, and several threaded grooves 15, 15, . . . provided on the outer periphery. ..., and several threaded channels are formed by the threaded grooves 15, 15... and the inner wall within the channel 2.

Incidentally, the cross-sectional area of these threaded grooves 15, 15, . preferable.

Further, the difference between the diameter D of the nozzle outlet 3 and the diameter d of the central hole 14 of the spinner element 13 influences the size of the conical spread of the sprayed cleaning liquid. That is, as this difference (D-d) increases, the spread of the conical jet increases, and therefore, if the cleaning surface has the same area, it is suitable for cleaning surfaces that are close to each other. If d) is reduced, the spread of the conical jet becomes smaller and is therefore suitable for cleaning surfaces that are located at long distances.

Furthermore, this is also related to the pressure of the washing water,
For a constant cleaning water pressure, if the diameter D of the nozzle outlet 3 is too small, the water droplets will be too small, thus causing a reduction in the cleaning action and directional stability. Conversely, if the diameter D of the nozzle outlet 3 is too large, water consumption will be excessive.

50mm from nozzle outlet 3 with this nozzle
General values suitable for removing stubborn stains from surfaces to be cleaned located at a distance of ~150 mm are a pressure applied to the cleaning liquid of 1 to 6 bar, preferably 2 bar.
~3.5 bar, diameter D of nozzle outlet 3 is 1.3
~3.5 mm, preferably in the range of 1.7 to 2.9 mm; the difference (D-d) between the diameter D of the nozzle outlet 3 and the diameter d of the central hole 14 of the spinner element 13 is 0.2 to 0.5 mm;
Preferably it is in the range of 0.3 to 0.4 mm.

In the nozzle according to the above embodiment, the cleaning liquid is sprayed in a conical shape 16 as shown by the broken line in FIG. Therefore, the entire surface of the cleaning surface 17 is substantially uniformly bombarded with the cleaning liquid, and the entire surface is cleaned. Also, since the cleaning liquid is given rotational kinetic energy when passing through the threaded grooves 15, 15, etc. provided on the outer periphery of the spinner element 13 in the nozzle body 1, the cleaning liquid is struck at a certain angle with respect to the cleaning surface 17. Cleaning surface 17
The cleaning surface 17 acts to scrape off dirt adhering to the cleaning surface 17, thereby ensuring that the dirt on the cleaning surface 17 is washed off. Note that when the nozzle body 1 does not face the cleaning surface 17 directly but at a certain angle as shown in FIG. 5, the axis of the conical jet 16 faces the cleaning surface 1.
7 should be placed so that it crosses at a point above the middle. This is because, in the injection by the nozzle of the present invention, the relationship between the water droplet density T and the injection direction S across the conical injection 16 is approximately as shown by the diagonal line in FIG. This is because the areas where the water droplet density T is dense are hit by the areas where the water droplet density T is sparse, and the areas where the water droplet density is sparse are hit close to each other, and as a result, the cleaning surface 17 receives a substantially uniform cleaning power over its entire surface.

To change the jetting direction of the nozzle according to the above-described embodiment, for example, a jetting direction adjusting device 18 as shown in FIG. 6 may be used.

That is, the device 18 has a hole 1 at one end thereof having an inner diameter slightly larger than the outer diameter of the cylindrical portion 5 of the nozzle body 1.
9 is formed in the axial direction, and the wall of that portion is provided with cuts 2 corresponding to the positions of the ribs 6, 6...
0, 20... are formed in the axial direction. Therefore, if you align the notches 20, 20... with the ribs 6, 6... and push them in, the ribs 6, 6,
... goes into the notches 20, 20 ... and the instrument 18
One end advances so as to surround the outer wall of the cylindrical portion 5 of the nozzle body 1. Here, since the other end of the device 18 indicates the direction of jetting by the nozzle, if force is applied to this part, the nozzle, which is firmly and elastically fitted into the cylindrical part 10, will The orientation of the main body 1 can be easily changed.

As described above, in the nozzle of the present invention, the nozzle body is elastically held within the holding hole of the nozzle housing, so that it is possible to While the orientation of the nozzle body, that is, the nozzle jet direction, can be easily adjusted, the nozzle jet direction may be distorted due to the vibrations that are applied when used in vehicles, etc., and the repulsive force that occurs when spraying cleaning liquid. There is no such thing.

In addition, the shapes of the nozzle body and nozzle housing of the nozzle of the present invention are extremely simple, and can be easily manufactured by injection molding or pouring, and the assembly requires simply press-fitting the nozzle body, making it suitable for mass production. suitable for doing.

Furthermore, since the nozzle body is made of synthetic resin, even when used in cold regions, the cleaning liquid would freeze inside the nozzle with metal nozzles with high thermal conductivity, but with the nozzle of this invention, has the advantage of not having such a problem.

As shown in the above embodiment, a flow path is provided in the nozzle body from one side, and a nozzle outlet having a smaller diameter than the flow path is provided to connect the flow path to the outside from the other side. If a spinner element having a threaded groove and a central hole is press-fitted and fixed in the flow path, the cleaning liquid to be sprayed will hit the cleaning surface while rotating in a threaded manner, so It is highly useful as a nozzle for cleaning stubborn stains on glass surfaces, etc. from a distance. Also, in this case, the spinner element has a shape that allows it to rotate and escape from the mold by pushing it out with a dowel pin, so it is difficult to make holes in post-processing or nest the molds. Suitable for mass production as it does not require complicated processes.

In the embodiment, the entire outer circumferential surface 12 of the nozzle body 1 except for the portion where the flow path 2 and the like are formed is spherical, but the spherical surface is necessary for the nozzle jet. Holding hole 9 when changing direction
If the variable range of the injection direction may be narrow depending on the application, the portion that must be spherical will naturally be reduced.

In addition, in the example, all parts were made of synthetic resin, but if only the nozzle body is made of synthetic resin, the nozzle body can be elastically held within the holding hole of the nozzle housing, and the spinner element and The nozzle housing may be made of aluminum, for example, and may be formed using a mold.

[Brief explanation of the drawing]

Figures 1 to 4 show an example of the implementation of the nozzle of the present invention, Figure 1 is a central vertical cross-sectional view of the entire nozzle body taken along the line 1-1 in Figure 2, and Figure 2 is the nozzle body. 3 is an enlarged front view of the spinner element, FIG. 4 is an enlarged side view of the spinner element, FIG. 5 is a schematic diagram showing the relationship between the jetting direction S and the water droplet density T of the nozzle of the present invention, FIG. 6 is a perspective view showing an example of the injection direction adjusting device. Explanation of symbols: 1... Nozzle body, 2, 3... Nozzle opening, 4... Bottomed hole, 7... Nozzle housing, 9... Holding hole.

Claims (1)

[Scope of utility model registration request] A spherical body made of synthetic resin is provided with a nozzle opening that passes through the body from front to back, and an appropriate number of holes are bored around the nozzle opening approximately parallel to the nozzle opening to form a nozzle body, and the nozzle body is attached to the nozzle housing. 1. A nozzle characterized in that a holding hole having an inner diameter slightly smaller than the diameter of the nozzle body is press-fitted into the holding hole, and the nozzle body is elastically held in the nozzle housing.