JPH031080Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a nozzle body structure for a window washer that sprays cleaning liquid onto the windows of automobiles such as passenger cars.

[Problems to be solved by the prior art and the invention]

Conventionally, the nozzle body of this type of window washer was designed to eject cleaning liquid in a concentrated manner at only one point, so the cleaning liquid spouted onto the window surface inevitably hit the wiping area of the blade. It has the disadvantage that it does not spread widely and therefore causes uneven cleaning using the cleaning liquid.

Therefore, some attempts have been made to have the nozzle in two stages, upper and lower, but this method still has a narrow cleaning liquid ejection area in the left and right direction, and the nozzle body structure becomes complicated. It is difficult to eject cleaning liquid uniformly from the upper and lower nozzles, and the amount of ejection may vary, which has become a problem.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a nozzle body structure for a window washer that can eliminate these drawbacks. A nozzle body that ejects water toward the nozzle body is provided with a backflow prevention valve mechanism for preventing backflow of cleaning liquid, and the backflow prevention valve mechanism includes a valve body that is freely installed in a communication hole provided in the body of the nozzle body; The valve body is characterized in that it is constructed using a bullet that biases the valve body in a direction against the discharge pressure from the washer pump.

Accordingly, in the present invention, although the cleaning liquid is ejected from one point due to this configuration, it is made possible to eject the cleaning liquid in a widely diffused ejection area due to the stray movement of the valve body.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings. In the drawing, 1 is a nozzle body of a window washer attached to a car body 2,
The nozzle body of the nozzle body 1 includes an upper body 5 to which the nozzle opening 4 is attached, as will be described later, and a lower body 6 that is integrally assembled to the legs of the upper body 5.
It is composed of: That is, the upper body 5 is composed of a head 5a and a leg 5d, and the leg 5a is provided with a pair of left and right nozzle holes 5b, into which the nozzle opening 4 is integrated. It is fitted and assembled. A leg portion 5d extending from the head portion 5a has a communication hole 5c following this nozzle hole 5b.
The structure is such that the legs are connected to the
A fitting hole 5e with a larger diameter than the communication hole 5c is provided at the lower end of d.
has been established. On the other hand, the lower body 6 has a fitting part 6a formed at its upper end fitted into the fitting hole 5e, and both are integrally fixed to the upper body 5 by appropriate means such as ultrasonic welding. The lower body 6 is provided with a communication hole 6b having approximately the same diameter as the communication hole 5c of the upper body 5, and a lower end portion (not shown) of the communication hole 6b is formed in the lower body 6. A small diameter inlet port 6c is formed into which the cleaning liquid discharged from the washer pump flows.

Further, 7 is a coil bullet installed in the communication holes 5c and 6b, and the coil bullet 7 has an upper end having a diameter substantially equal to the inner diameter of the communication hole 5c,
It is adapted to be fitted and supported at the upper end of the communication hole 5c, but the diameter gradually becomes smaller as it reaches the lower end.
The lower end portion with the smallest diameter is the communication hole 5c, 6
It comes into contact with a sphere 8 that is freely fitted inside b, biasing the sphere 8 toward the inlet 6c, and normally closes the inlet 6c. Then, when the cleaning liquid is discharged from the washer pump, the sphere 8
The inlet 6 moves upward against the biasing force of the coil bomb 7.
c is opened, thereby allowing the cleaning liquid to flow into the communication holes 5c and 6b, and the inflowing cleaning liquid passes through these and is ejected from the nozzle port 4. In this way, the cleaning liquid is A check valve mechanism A is configured. In this embodiment, in this backflow prevention valve mechanism A, the sphere (valve body) 8 is connected to the communication hole 5.
c, 6b so as to be freely movable, and the diameter of the coil bomb 7 that presses it becomes smaller toward the bottom where it comes into contact with the sphere 8. The moved sphere 8 passes through the communication holes 5c and 6.
It is inferred that the robot moves in a complex manner, swaying not only vertically but also horizontally within b.
The cleaning liquid becomes turbulent, passes through the spherical part, and is ejected from the nozzle port 4. As a result, the ejection area of the ejected cleaning liquid is
It has a wide ejection area that is widely diffused in the vertical and horizontal directions.

Here, to explain the embodiment more specifically with numerical values, in this embodiment, the discharge pressure G of the washer pump is about 1.2Kg/cm ² , and the biasing force H of the coil bullet is about 0.08Kg/cm ² (G/H=
15/1), and the inner diameter B of the communicating holes 5c and 6b is 4.0.
mm, the outer diameter C of the sphere 8 is 3.2 mm, the diameter D of the lower end of the coil bullet 7 is 2.5 mm, and the inner diameter E of the inlet 6c.
is set to be 2.2 mm, and the total length F of the communicating holes 5c and 6b is set to be 25 mm.

In the embodiment of the present invention constructed as described above, when the cleaning liquid is discharged under pressure by driving the washer pump, the sphere 8 moves upward against the biasing force of the coil bullet 7 due to this discharge pressure. As a result, the cleaning liquid flows into the communication holes 5c and 6b from the inlet 6c and is ejected from the nozzle port 4.
At this time, as described above, in the present invention, the cleaning liquid is caused to generate a turbulent flow by the non-return valve mechanism A, so that the cleaning liquid is ejected in a diffused ejection area.

That is, in response to the discharge pressure from the washer pump, the sphere 8 resists the urging force of the coil bomber 7 and moves upward to a position where it is approximately in balance with the urging force, and the cleaning liquid flows into the communication hole 5.
The spheres 8 are freely installed in the communication holes 5c and 6b, and
The diameter of the coil bullet 7 that urges this becomes smaller toward the lower end, and as a result, the sphere 8 in the upward movement state
is the communication hole 5 under the pressure action of the cleaning liquid passing through.
The movement within c and 6b causes a complicated stray movement in the vertical and horizontal directions, and therefore, when the cleaning liquid passes through the sphere 8 portion, it is affected by the straying sphere 8. This creates a turbulent flow state, and the water is ejected from the nozzle opening 4 in a state where the ejection area is widely diffused in the vertical and horizontal directions. Therefore, the diffusion rate of the cleaning liquid when wiping the window with the blade is improved, and the wiping performance is significantly improved.

And this means that the coil bullet 7 and the sphere 8
When the check valve mechanism A is removed, or when the check valve mechanism A is installed in the middle of the piping that communicates the nozzle body 1 and the washer pump and is separated from the nozzle port 4, no jetting as in the present invention is possible. Since no diffusion phenomenon has been observed in the area, it can be said that the backflow prevention valve mechanism A itself plays a role as a cleaning liquid diffusion mechanism. This means that it can be effectively used as For this reason, the ejection area can be diffused by using a general-purpose nozzle port 4 as is, without using a special nozzle port structure or providing a dedicated diffusion mechanism. As a result, not only parts can be used interchangeably, but the structure can also be simplified.

Furthermore, in the above embodiment, the discharge pressure G of the washer pump was set to approximately 1.2 kg/cm ² and the biasing force H of the coil bullet was set to approximately 0.08 kg/cm ² (G/H=
15/1), but it can be said that it is preferable to set it to this level from practical points of view such as the discharge amount of cleaning liquid and the size of the diffusion area, and the biasing force of the coil bomber can be set to this level. On the other hand, if it is made smaller, the diffusion area will be smaller, and if it is made larger, the discharge amount will be reduced.Also, the closer the diameter of the lower end of the coil bullet is to the diameter of the upper end, the smaller the diffusion area will be. However, these values can be set arbitrarily if necessary, just like the other values mentioned above, and the point is that the check valve mechanism A provided in the nozzle body 1 Any means may be used as long as it acts as a diffusion mechanism for the cleaning liquid.

[Effect]

In summary, since the present invention is constructed as described above, when the cleaning liquid is jetted from the nozzle body, the jetted cleaning liquid flows in the communication hole provided in the body of the nozzle body in a floating manner. When the valve body inside the valve body moves vertically and horizontally, the flow is disturbed and the ejection area is diffused. Even without using any special nozzle opening, the cleaning liquid can be ejected over a widely diffused area on the window surface, and the blade can perform extremely efficient wiping action.

Moreover, since the communication hole and the valve element biased by the bullet, which make up this check valve mechanism, also act as a diffusion mechanism for the cleaning liquid, there is no need to provide a dedicated diffusion mechanism in the nozzle body. This does not require any particular increase in size, and can greatly contribute to the simplification of the structure as well as the ability to use multiple parts.

[Brief explanation of the drawing]

The drawings show one embodiment of the nozzle structure of a window washer according to the present invention, in which Fig. 1 is a partially cutaway side view of the nozzle body, Fig. 2 is a plan view of the nozzle body, and Fig. 3 is a plan view of the nozzle body. The figure is a front view of the nozzle body. In the figure, 1 is a nozzle body, 4 is a nozzle opening, 5c, 6
b is a communication hole, 7 is a coil bullet, 8 is a sphere, and A is a check valve mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. A nozzle body that spouts the cleaning liquid discharged from the washer pump toward the window surface is provided with a backflow prevention valve mechanism that prevents the backflow of the cleaning liquid, and the backflow prevention valve mechanism A window characterized in that it is constructed using a valve body that is freely installed in a communication hole provided in a body, and an elastic force that biases the valve body in a direction that resists the discharge pressure from a washer pump. Otsusha nozzle body structure. 2. The valve body is a spherical body that is freely installed in a communication hole provided in the body of the nozzle body, and the bullet has a smaller diameter on the side that contacts the sphere than the other end, and the spherical body is connected to a washer pump. A nozzle body structure for a window washer as claimed in claim 1, characterized in that it is a coil bullet which is biased in a direction to resist the discharge pressure from the windshield. 3. The nozzle body structure of a window washer according to claim 2, wherein the ratio between the biasing force of the coil bullet and the discharge pressure of the washer pump is set to approximately 1:15.