JPH0451883Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Purpose of invention]

(Industrial Application Field) This invention relates to a wash nozzle for spraying a washing liquid onto a washing surface of an automobile, for example, and particularly relates to a wash nozzle in which a check valve is provided in the nozzle body. (Prior Art) Conventionally, for example, there has been a washer nozzle as shown in FIG. 3 as described above. That is, in the wash nozzle 100 shown in the figure, numeral 101 is a nozzle body, and numeral 102 is a nozzle body.
103 is a nipple, 103 is a cleaning liquid feed hole provided continuously in the nozzle body 101 and the nipple 102, 104 is a nozzle in which the direction of cleaning liquid jet can be changed through the cleaning liquid feed hole 103 on the end side of the nozzle body 101, 105 106 is a check valve spring housed in the cleaning fluid supply hole 103.
is a check ball housed in the cleaning liquid supply hole 103 and in contact with the check valve spring 105; this check ball 106 is located at the lower end of the nipple 102 in the figure on the side opposite to the side in contact with the check valve spring 105. In other words, the check ball holding portion 102a is in contact with a check ball holding portion 102a provided on the connection side of a wash tank or pump (not shown). Here, the nozzle body 101 is provided with a connecting part 101b having a recessed part 101a at the lower end in the figure. On the other hand, the nipple 102 is provided with a connecting portion 102c having a convex portion 102b at the upper end in the figure, and when the concave portion 101a of the nozzle body 101 and the convex portion 102b of the nipple 102 are aligned, the connecting portion 101b of the nozzle body 101 is and nipple 10
The two connecting portions 102c are connected by welding. That is, the cleaning fluid supply hole 103 is closed by the check ball 106 pressed by the check valve spring 105 against the pressure in the cleaning fluid supply direction, that is, the direction of the arrow in the figure, and the cleaning fluid supply pressure is equal to or higher than a predetermined value. If this occurs, move the check ball 106 upward in the figure to clean the cleaning liquid supply hole 10.
3 is opened, and cleaning liquid supplied from a wash tank or pump (not shown) is sprayed from a nozzle 104. (Problems to be solved by the invention) However, in the conventional washer nozzle 100 as described above, for example, the cleaning liquid supply hole 1
03 freezes, the volume of cleaning liquid between the nozzle 104, which has an injection hole significantly smaller than the cross-sectional area of the cleaning liquid supply hole 103, and the cleaning liquid supply hole 103, which is blocked by the check ball 106, is expands, and the expansion energy is used to connect the nozzle body 101 and the nipple 102 to each connecting portion 1.
Washer nozzle 1 acts on 01b and 102c.
There was a problem that 00 could be destroyed. In particular, in the case of wash nozzles, PBT (Polybutylene Terephthalate), which is a material with good weather resistance, is used.
is often used, but PBT has a high melting point and is difficult to weld, so nozzle body 101 and nipple 102
It is difficult to uniformly weld the entire circumference, and if stress is concentrated in an insufficiently welded area, there is a problem in that it may break. (Purpose of the invention) Therefore, this invention was devised to solve the above-mentioned conventional problems.The structure is simple and strong, and when hot crimping, it can be crimped evenly around the entire circumference. The purpose is to provide a wash nozzle that is less likely to break.

[Structure of the idea]

(Means for Solving the Problems) The configuration of the washer nozzle according to this invention to achieve the above object is such that a check valve spring and a check ball are housed in the cleaning liquid supply hole, and the cleaning liquid supply hole is connected to the check valve spring. In a washer nozzle that opens and closes with a check ball pressed by a valve spring, an elastic member fitted into the cleaning liquid supply hole and provided with an opening is brought into contact with the check ball pressed by the check valve spring. It is characterized in that the elastic member is prevented from coming off by attaching it to the nozzle body and heat-stamping it. (Example) An example of the washer nozzle according to this invention will be described below with reference to FIGS. 1 and 2. That is, in the wash nozzle 1 shown in the figure, reference numeral 2 indicates a nozzle body, numeral 3 indicates a cleaning liquid feed hole passing through both ends of the nozzle body 2, numeral 4 indicates a check valve spring, numeral 5 indicates a check ball, and numeral 6 indicates a PBT (Polybutylene).
Terephthalate) or POM
(Polyoxymethylene) or PVC (Polyvinyl
It is an elastic member made of resin such as chloride and has some elasticity. The nozzle body 2 is equipped with a nozzle 7 at the upper end in FIG. 1 of a cleaning liquid feed hole 3 passing through the nozzle body 2, which can change the direction of jetting the cleaning liquid. Approximately at the center of the nozzle body 2 in FIG. 1, there are hooks 2a, 2a for attaching the nozzle body 2 to a vehicle body panel. Further, the nozzle body 2 is provided with a hook-shaped connecting portion 2b at the lower end in FIG. is formed. Here, the cleaning liquid feed hole 3 is bent in the upper part in FIG. 1, and its inner diameter is smaller than the inner diameter in the lower part in FIG. In this embodiment, the first
In the figure, near the bottom end, there is an elastic member engaging portion 3 that is annularly recessed and slightly larger than the inner diameter of the cleaning liquid supply hole 3.
A is provided. On the other hand, in this embodiment, the elastic member 6 is
It has a generally cylindrical shape, and is provided with an opening 6a at approximately the center thereof, passing through the top and bottom in FIG. 1 and having an inner diameter smaller than the outer diameter of the check ball 5.
The outer diameter of the outer circumferential portion is slightly larger than the inner diameter of the cleaning liquid supply hole 3, and a part of this outer circumferential portion has an outer diameter slightly larger than the inner diameter of the elastic member engaging portion 3a. An annular protrusion 6a that can be fitted into the elastic member engaging portion 3a is provided. That is, in FIG. 2 showing the assembly procedure of the washer nozzle 1, the check valve spring 4 is inserted into the cleaning fluid supply hole 3 of the nozzle body 2, and the check ball 5 is inserted into the upper end of the check valve spring 4 in the figure. I'll put it on. and,
The elastic member 6 is pushed into the cleaning liquid supply hole 3 so that it comes into contact with the check ball 5 and the annular protrusion 6a of the elastic member 6 fits into the elastic member engaging part 3a of the cleaning liquid supply hole 3. Therefore, nozzle body 2
In the figure, the elastic member 6 is fixed by bending the elastic member fixing portion 2c formed at the upper end toward the inner circumference by heat crimping. That is, as a result, the washer nozzle 1
In FIG. 1, a connecting tube (not shown) is connected to the connecting portion 2b at the lower end, and the elastic member 6 is pressed with the check ball 5 against the feeding pressure of the cleaning liquid fed from the connecting tube. Opening part 6a
It is becoming more and more obstructed. For example, check ball 5 and nozzle 7
Even if the cleaning liquid freezes and expands in volume, the elastic member 6 receives the expansion energy and easily breaks because the conventional connection between the nozzle body and the nipple is eliminated. It will never reach . Note that the reference numeral 8 in the figure is a rubber sheet for improving the adhesion to the vehicle body panel when the nozzle body 2 is attached to the vehicle body panel.

[Effect of the idea]

As explained above, according to the wash nozzle according to this invention, a check valve spring and a check ball are housed in the washing liquid supply hole,
In a washer nozzle in which the cleaning liquid supply hole is opened and closed by a check ball pressed by the check valve spring, an elastic member fitted into the cleaning liquid supply hole and provided with an opening is connected to the check ball pressed by the check valve spring. The elastic member is attached to the nozzle body while in contact with the ball and is heat-stamped to prevent the elastic member from coming off, resulting in a significantly simpler structure than conventional ones. It has the excellent effect of being able to withstand even the most severe conditions.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a washer nozzle according to an embodiment of this invention, Fig. 2 is a longitudinal cross-sectional view of each individual component to explain the assembly procedure in the wash nozzle shown in Fig. 1, and Fig. 3 is a longitudinal cross-sectional view of a conventional wash nozzle. FIG. DESCRIPTION OF SYMBOLS 1... Wash nozzle, 2... Nozzle body, 3... Cleaning liquid feed hole, 4... Check valve spring, 5... Check ball, 6... Elastic member.

Claims (1)

[Scope of utility model registration request] A check valve spring is installed in the cleaning fluid supply hole.
In the washer nozzle, which houses a check ball and opens and closes the cleaning liquid supply hole with a check ball pressed by the check valve spring, an elastic member that fits into the cleaning liquid supply hole and has an opening is connected to the check valve spring. A washer nozzle characterized in that the elastic member is attached to the nozzle body in contact with a check ball pressed by the elastic member and is heat-stamped to prevent the elastic member from coming off.