JP2000254555A - Washer nozzle provided with reverse flow check mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical washer nozzle with no deterioration of reverse flow check function to a washing liquid in a washer apparatus. SOLUTION: This washer nozzle 10 is constituted of a nozzle body 12 provided with a washing liquid supply port 12a, a jetting port 12b, and a washing liquid sending route 12c communicating both ports and comprising a nozzle engaging part 12d in the supply port 12a side, a pipe 14 comprising a pipe engaging part 14a to be engaged with the nozzle engaging part 12d, a center open part 14b, and a circular pipe butting part 14c projected in the inner diameter side of the supply port 12a and made of an elastic material, a valve 16 installed in the inside of the sending route 12c to close the center open part 14b by bringing a valve butting part 16a to be butted to the pipe butting part 14c, and an energizing member 18 installed in the sending route 12c to energize the valve 16 in the pipe direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer device for cleaning a window glass or the like of a vehicle, and more particularly to a washer nozzle for jetting a cleaning solution that has been fed under pressure.

[0002]

2. Description of the Related Art A washer device for cleaning a window glass or the like of a vehicle includes a tank containing a cleaning solution, an electric pump for pumping the cleaning solution, a washer nozzle for injecting the cleaning solution to a predetermined position, a pipe serving as a pressure feeding path for the cleaning solution, and the like. Consists of

[0003] A problem that generally arises in the washer device is that the washing liquid flows out of the washer nozzle based on the centrifugal force at the time of turning of the vehicle or the expansion phenomenon of the washing liquid due to an increase in the temperature of the engine room, and the outer surface of the vehicle such as a hood is removed. Some things get dirty.

To solve this problem, a washer nozzle with a check mechanism has been devised. For example, FIG.
As shown in the figure, the nozzle body is made of two parts, an upper and lower resin upper body 112 and a lower resin body 114, and a spring 118 and a spring 1 are provided in a cleaning liquid supply passage 112c on a supply port 112a side formed in the upper body 112.
A plate 120 receiving the urging force of 18 and a valve 116 made of an elastic material are arranged, and then a lower body 114 having a cleaning liquid supply path 114a and a contact surface with the valve 116 at the center is ultrasonically welded to the upper body 112. In a normal state in which an electric pump (not shown) does not operate, the energized valve 116 closes the cleaning liquid supply passage 114a and reverses the outflow of the cleaning liquid.
Has been proposed. Further, as shown in FIG. 4, a spring 158 and a metal valve 156 are disposed in a cleaning liquid supply passage 152c on the supply port 152a side formed in the upper body 152, and thereafter, the cleaning liquid supply passage 154a and The lower body 154 having an abutting surface with the valve 156 is ultrasonically welded to the upper body 152. In a normal state where the electric pump does not operate, the energized valve 156 closes the cleaning liquid supply path 154a to prevent the cleaning liquid from flowing out. A non-returning washer nozzle 150 has been proposed.

[0005]

However, the former washer nozzle 110 requires a rigid resin plate 120 in order to receive the urging force of the spring 118.
Since the latter washer nozzle 150 uses the metal valve 156, the checker function is poor. further,
In both cases, the upper and lower upper bodies 112 and 152 and the lower bodies 114 and 154 need to be joined by ultrasonic welding, which has been a factor of increasing the cost of the washer nozzle.

Accordingly, an object of the present invention is to provide an inexpensive washer nozzle that solves the above-mentioned problems and does not impair the check function.

[0007]

According to the first aspect of the present invention, there is provided a cleaning liquid supply port, an injection port, and a cleaning liquid supply path connecting the two, and a nozzle engaging portion is provided on the supply port side. A pipe formed of an elastic material having a nozzle body, a pipe engaging portion that engages with the nozzle engaging portion, a central opening, and an annular pipe contact portion protruding toward the inner diameter side of the supply port; A valve that is disposed in the feed path and abuts a valve contact part that contacts the pipe contact part to close the opening, and a valve that is disposed in the feed path and attaches the valve in a pipe direction. And a biasing member for biasing.

According to a second aspect of the present invention, in the washer nozzle according to the first aspect, one of the pipe contact portion and the valve contact portion has a convex shape protruding in the contact direction. Is the gist.

According to a third aspect of the present invention, in the washer nozzle according to the first and second aspects, the nozzle engaging portion is located at the outer diameter portion and the amount of protrusion toward the outer diameter side increases toward the injection port. The gist of the present invention is that the projection has a substantially triangular cross section to be enlarged.

[0010]

According to the first aspect of the present invention, the pipe abutting portion is provided at the connecting portion of the pipe made of an elastic material, which is the pressure feeding path of the cleaning liquid, with the nozzle body, so that the pipe abutting portion is elastically operated. Check function is ensured, and
The valve does not need to have elasticity, and the plate conventionally used for receiving the biasing force of the spring is not required. Furthermore, since the two are connected by the engagement of the nozzle engaging portion provided on the nozzle body and the pipe engaging portion provided on the pipe, the conventionally used lower body and its ultrasonic welding work are not required.

According to the second aspect of the present invention, one of the pipe contact portion and the valve contact portion has a convex shape protruding in the contact direction. And the check function becomes higher.

According to the third aspect of the present invention, the nozzle engaging portion is formed in a substantially triangular cross-sectional convex portion which is located at the outer diameter portion and increases the amount of protrusion toward the outer diameter side as it goes to the injection port. The nozzle body and the pipe can be connected smoothly and one-touch only by pushing the nozzle body in the connection direction, and the falling off of both is reliably suppressed by the tip of the convex portion having a substantially triangular cross section.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. First, the first embodiment is shown in FIG.
This will be described below.

FIG. 1 shows a sectional shape of a washer nozzle 10 according to a first embodiment of the present invention.

[0015] Washer nozzle 10 of the first embodiment of the present invention
As shown in FIG. 1, the supply port 12a of the cleaning liquid and the injection port 1
2b and a cleaning liquid supply path 12c communicating the two,
A jet 19 for finely adjusting the jetting direction so as to jet the cleaning liquid to a predetermined position is rotatably fitted into the jet port 12b, and a nozzle engaging concave portion 12d is provided on the outer diameter surface on the supply port 12a side. The nozzle body 12 is provided with a pipe engaging protrusion 14a and a central opening 14b which are in pressure contact with the nozzle engaging recess 12d, and an annular pipe contact protrusion 14c protruding toward the inner diameter side of the supply port 12a. The central opening 14b is closed by bringing the pipe 14 formed of the elastic material provided into contact with the valve contact flat portion 16a disposed in the feed passage 12c and contacting the pipe contact convex portion 14c. It comprises a valve 16 and a coil spring 18 disposed in the feed passage 12c to bias the valve 16 toward the pipe 14.

In the structure of the first embodiment described above, when the cleaning liquid is pumped by an electric pump (not shown), the valve 16 is pressed against the spring force of the coil spring 18.
Moves to the injection port 12b side and the pipe 14
The closing of the central opening 14b is released, and the cleaning liquid is jetted from the jet 19 via the feed path 12c.
When the electric pump is not operating, the closing of the central opening 14b of the pipe 14 by the valve 16 is maintained by the spring force of the coil spring 18, and the centrifugal force at the time of turning of the vehicle or the temperature of the engine room is maintained. Even when the cleaning liquid expands due to the rise, the outflow of the cleaning liquid from the washer nozzle 10 to the outside is suppressed.

Further, according to the structure of the first embodiment described above, the pipe 1 made of an elastic material and serving as a pressure feed path for the cleaning liquid is provided.
The pipe contact convex portion 14 is provided at the connection portion with the nozzle body 12 of No. 4.
By providing c, the check function is reliably ensured by the elastic deformation action of the pipe contact projection 14c,
The valve 16 does not need to have elasticity, so that the plate conventionally used to receive the biasing force of the spring is not required. Further, a nozzle engaging concave portion 12d provided on the nozzle body 12 and a pipe engaging convex portion 14 provided on the pipe 14 are provided.
The engagement of “a” can be performed by one-touch only by pushing the two in the connecting direction, so that the conventionally used lower body and its ultrasonic welding work are not required. Further, since the pipe contact convex portion 14c has a convex shape protruding in the contact direction, the contact pressure of the contact portion is increased, and the check function is enhanced. The same operation and effect can be obtained even when the valve contact portion 16a is formed in a convex shape protruding in the contact direction.

FIG. 2 shows a sectional shape of a washer nozzle 50 according to a second embodiment of the present invention.

A washer nozzle 50 according to a second embodiment of the present invention.
As shown in FIG. 2, the nozzle body 5 is different from the first embodiment.
This is a modification of the engagement portion between 2 and the pipe 54. Therefore, the common matter with the first embodiment is omitted, and only the engaging portion will be described. The nozzle engaging portion of the nozzle body 52 of the present example is the outer diameter portion 52e on the supply port 52a side and
2b, it is formed as a substantially triangular cross-section convex portion 52d that increases the amount of protrusion toward the outer diameter side, and the inner diameter of the tip 54a serving as a pipe engaging portion of the pipe 54 is the same as the outer diameter portion 52e on the supply port 52a side. It is formed to have a slightly smaller diameter than the outer diameter of the substantially cross-sectionally triangular convex portion 52d.

Therefore, in addition to the functions and effects of the first embodiment, according to the configuration of the second embodiment described above, the nozzle body 52 and the pipe 54 increase the amount of protrusion toward the outer diameter side as they proceed toward the injection port 52b. The substantially triangular cross-section convex part 52d is connected by fitting into the tip inner diameter 54a which is a pipe engaging part having a slightly smaller diameter than the outer diameter of the substantially cross-sectional triangular convex part 52d, so that the connection between both is easy, The function and the effect that the two parts are reliably prevented from falling off at the tip of the substantially triangular cross-section convex part 52d is obtained.

[0021]

As is apparent from the above description, according to the present invention, a pipe contact portion is provided at a connection portion of a pipe made of an elastic material, which is a pressure feed path of a cleaning liquid, with a nozzle body, thereby providing a pipe contact. The check function is reliably ensured by the elastic deformation action of the contact portion, and the valve does not need to have elasticity, so that the plate conventionally used for receiving the urging force of the spring is not required. Furthermore, since the two are connected by the engagement of the nozzle engaging portion provided on the nozzle body and the pipe engaging portion provided on the pipe, the conventionally used lower body and its ultrasonic welding work are not required. As a result, it is possible to provide an inexpensive washer nozzle that does not impair the check function of the cleaning liquid.

[Brief description of the drawings]

FIG. 1 shows a washer nozzle 10 according to a first embodiment of the present invention.
FIG.

FIG. 2 shows a washer nozzle 50 according to a second embodiment of the present invention.
FIG.

FIG. 3 is a sectional view of a washer nozzle 100 according to the related art.

FIG. 4 illustrates another prior art washer nozzle 150 according to the prior art.
FIG.

[Explanation of symbols]

10, 50, 110, 150 ... Washer nozzle, 1
2, 52 ... Nozzle body, 12a, 52a, 112
a, 152a ... supply port, 12b, 52b ... injection port, 1
2c, 52c: feeding path, 12d: nozzle engaging recess, 1
4, 54 ... pipe, 14a ... pipe engagement convex part, 14
b, 54b Central opening, 14c, 54c Pipe abutment convex, 16, 56, 116, 156 Valve 16,
a, 56a: Valve contact portion, 18, 58, 118, 1
58 ... Coil spring, 19, 59, 119, 15
9 ... Jet, 52d ... Triangular convex section with approximately cross section, 52e
... Outer diameter portion, 54a.
52: Upper body, 114, 154: Lower body, 114a, 154a: Cleaning liquid supply path

Claims (3)

[Claims] 1. A nozzle body having a cleaning liquid supply port, an injection port, and a cleaning liquid supply path communicating between the nozzle body and a nozzle engaging part on the supply port side, and a pipe engaging with the nozzle engaging part. A pipe formed of an elastic material having an engagement portion and a central opening, and having an annular pipe contact portion protruding toward the inner diameter side of the supply port; and a pipe contact arranged in the feed path and A valve that abuts a valve abutting portion that abuts the portion to close the opening, and a biasing member that is disposed in the feed path and biases the valve in a pipe direction. Washer nozzle with check mechanism. 2. The washer nozzle with a check mechanism according to claim 1, wherein one of the pipe contact portion and the valve contact portion has a convex shape protruding in a contact direction. 3. The nozzle engaging portion is a convex portion having a substantially triangular cross-section, which is located at an outer diameter portion and increases the amount of protrusion toward the outer diameter side as the nozzle engaging portion advances toward the injection port. 2
7. A washer nozzle with a check mechanism according to claim 1.