JP2907519B2 - Wet wiper valve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet wiper valve, and in particular, rotates integrally with a wiper used for wiping a glass surface of an automobile or the like to spray water or the like on the glass surface. The present invention relates to a wet wiper valve used to perform the operation.

[Prior art and problems to be solved]

Conventionally, a wet wiper valve configured to spray water onto a glass surface by rotating integrally with a wire blade provided on a glass surface of an automobile and used for wiping water droplets and the like is described as an eleventh embodiment. The one shown in the figure is known.

That is, in the wet wiper valve 50 shown in FIG. 11, a wiper blade 52 is provided above a shaft 51 that is reciprocated through a link mechanism, and the wet wiper valve 50 is inserted with the shaft 51 inserted. Is provided.

The wet wiper valve 50 has a pivot holder 53 at its lower part, and the wiper blade 52 at its upper part.
And a revolving member 56 having a pair of nozzles 55, 55, which spray water on both sides of the wiper blade 52, while reciprocating and rotating integrally with the projection 54.

A plate 57 is provided between the rotating member 56 and the pivot holder 53, and the plate 57 slides on the lower surface of the rotating member 56 when the wiper blade 52 rotates, whereby Water is alternately sprayed from the nozzles 55 through holes 58 of the pivot holder 53, holes 59 of the plate 57, and holes 60 provided in the rotating member 56.

And, in the conventional wet wiper valve 50 configured as described above, the pivot holder 53 and the plate
57, and between the plate 57 and the rotating member 56 so that water does not leak from the rotating member 56.
1. Pressing with a wave washer 62 or the like prevents leakage between the pivot holder 53 and the plate 57 and between the plate 57 and the rotating member 56 when sliding.

However, with the above configuration, the sliding surface requires high-precision surface processing, and a large pressing force is applied to secure the sealing performance of the sliding surface. A large torque is required, and since there are many sliding parts, there is a lot of abrasion powder, and therefore, the durability is poor. Further, the number of parts is increased, and the assembling work becomes complicated, and the whole becomes expensive. Had the problem that

An object of the present invention is to be able to reliably perform sealing, perform reciprocating rotation with low torque by reducing the number of sliding parts, and further reduce the total number of parts,
An object of the present invention is to provide a wet wiper blade capable of facilitating an assembling operation.

[Means for solving the problem]

In order to achieve the above object, the present invention provides, as a first invention, a nozzle which is integrally rotated with a wiper attached to a shaft which is reciprocally rotated via a link mechanism, and which is located on both sides of a one-per. A wet wiper valve configured to inject water by switching, wherein the wet wiper valve includes a base having a flow path opening from a lower portion to an upper surface in a state where the shaft is inserted through a central portion, and a base having the base. A space is formed therebetween, and a rotating member provided with two valve members is in a state of covering the rotating member, and is reciprocally rotatable integrally with the wire. A lid member provided with two nozzles that are opened and closed by a valve member of a rotating member and that are opened and closed in reverse to each other are sequentially disposed from below to above; When an interlocking mechanism is disposed between the base member and a pivoting member, an interlocking prevention mechanism is disposed between the base and the rotating member, and when the lid member is integrally rotated when the wiper is rotated by the shaft, The turning member also turns integrally by the interlocking mechanism, and at this time, only the nozzle in the front in the turning direction is communicated with the flow path of the base portion, and the interlocking prevention mechanism operates just before the end of the turning area. A wet wiper valve characterized in that only the nozzles behind the rotating direction are opened.

As a second invention including the first invention, an interlocking mechanism provided between the rotating member and the lid member is urged upward by a spring provided in a concave portion provided on an upper surface of the rotating member. A predetermined distance between the steel ball and the inner surface of the lid member.
A wet wiper valve configured so that the lid member and the rotating member are interlocked only when the steel ball is located in the concave portion. Things.

As a second invention including the first invention, an interlocking prevention mechanism provided between the base and the rotating member includes an upstanding piece protruding from an upper surface of the base, and an upright piece provided on the rotating member. While the upright piece is constituted by an arc-shaped groove, the lid member and the rotating member are integrally rotated by the interlocking mechanism.
When the upstanding piece of the base contacts the end of the arc-shaped groove of the rotating member and the interlocking prevention mechanism operates, the operation of the interlocking mechanism is prevented, and at this time, the steel ball of the interlocking mechanism is rotated. This constitutes a wet wiper valve that moves from the front recess to the rear recess.

[Action]

Since the present invention employs the above-described means, it is possible to spray water from the nozzle on the front side in the turning direction when the wiper is turned,
Further, the nozzle is switched just before the end of the rotation so that the other nozzle can eject the liquid.

Therefore, the jetted water can be reliably removed by the time the wiper reaches the end of rotation.

In addition, the nozzle can be switched by a valve provided on a rotating member that rotates within a predetermined range integrally with the wiper, and at the time of this switching, only a force that switches the recess where the steel ball is located is sufficient. The required torque may be small.

〔Example〕

Hereinafter, embodiments of the present invention shown in the drawings will be described.

1 to 10 show a wet wiper valve 1 according to the present invention.
Is arranged in a state where the shaft 2 reciprocally rotated by the link mechanism is inserted in the same manner as the conventional one.

The wet wiper valve 1 includes a base 3 fixed to a fixed portion of an automobile, a rotatable member 4 provided on an upper surface of the base 3, and rotatable. And a lid member 6 provided with two nozzles 5a and 5b on the side surface.

The base 3 has an opening from the lower surface to the upper surface, has a flow path 8 provided with a nozzle 7 on the lower surface side, and a central hole 9 through which the shaft 2 is inserted is formed in the center.

Also, an annular projection 10 is formed on the upper surface,
An upright piece 11 protrudes from a part of the protrusion 10.

The rotating member 4 has an annular shape having a predetermined thickness in which a space 12 is formed by two members welded or bonded, as shown in FIG. 8, and a part of the upper part is cut off. A flat portion 13 is formed, and an arc-shaped groove 14 for receiving the standing piece 11 of the base 3 is formed in the flat portion 13.

Further, the upright portions 15, 15 on both sides of the flat portion 13
As shown in the figure, rubber valves 17, 17 urged in a predetermined projecting state by a spring 16 are provided, respectively, and vacancies 18, Is in communication with

As shown in FIG. 6, a recess 19 is formed in a part of the upper surface, and a steel ball 21 urged in a protruding state by a spring 20 is provided in the recess 19.

The lid member 6 has a cylindrical shape with an upper surface closed,
Nozzles 5a and 5b communicating with the inside at two places of cylindrical hanging part 22
Is provided.

In addition, walls 23, 23 are respectively formed so as to communicate with the two nozzles 5a, 5b inside, and the walls 23, 23 are valved such that the inner ends thereof come into contact with the front surfaces of the valves 17, 17, respectively. The protrusion amount is parallel to the front surface of 17, 17.

Further, a cylindrical portion 23 for inserting the shaft 2 is integrally provided at the center of the upper surface of the lid member 6.

Also, the rotating member 4 is provided on the inner surface of the upper surface of the lid member 6.
Two recesses 25, 25 for receiving the steel balls 21 protruded by the springs 20 from the inside of the recesses 19 opened on the upper surface of the housing are provided at predetermined intervals.

An interlocking mechanism is formed by the concave portion 19, the spring 20, and the steel ball 21 formed in the rotating member 4 and the two concave portions 25, 25 formed on the inner surface of the upper surface of the lid member 6.

Although not shown, the lid member 6 is provided with an engagement portion for engaging with a part of the wiper blade similarly to the conventional one, and the wiper blade is turned through a shaft. When it is moved, it rotates together.

Then, the base 3, the rotating member 4, and the lid 6
When the is assembled, first, the shaft 2 is inserted into the center hole 9 of the base 3, and the packings 30, 30 are respectively located on the inner and outer peripheral surfaces of the annular projection 10.

Furthermore, a lower plate 31 is located on the upper surface of the annular projection 10 of the base 3, and a hole for receiving the standing piece 11 protruding from a part of the upper surface of the annular projection 10 of the base 3. Are drilled.

A washer 32 is provided on the upper surface of the lower plate 31.
An upper plate 33 having a spline connection with the tubular portion 24 of the lid member 6 is located through the upper plate 33.

The turning member 4 is located on the upper surface of the upper plate 33, and the standing piece 11 of the base 3 is placed in an arc-shaped groove 14 provided in the flat portion 13 of the turning member 4.
Is located.

Therefore, the rotating member 4 moves relative to the base 3.
It is rotatable within a range in which the end of the arc-shaped groove 14 contacts.

The upright piece 11 of the base 3 and the arc-shaped groove 14 of the rotating member 4 form an interlocking prevention mechanism.

The lid member 6 is attached so that the shaft 2 is inserted into a cylindrical portion 24 at the center thereof, and the outer surface of the cylindrical portion 24 is formed in the center of the rotating member 4 and the annular shape of the base 3. Of the cover member 6,
Is suspended outside the annular projection 10 of the base 3, and the space between them is sealed by the packings 30, 30.

In the assembled state, the two nozzles 5a and 5b provided on the lid member 6 are mounted so as to be located on both sides of the wiper blade, respectively, and the respective nozzles 5a and 5b are connected to the central portion of the wiper blade. By connecting to a pipe that opens in step (1), a washer liquid or the like can be sprayed from the center of the wiper blade.

When the rotational power of a link mechanism (not shown) is transmitted via the shaft 2, the wiper blade attached to the shaft 2 rotates integrally, and at this time, the lid member 6 also rotates integrally. Move.

Before the wiper blade is rotated, the wiper blade is in a standby state in one of the rotation areas, and therefore, the lid member 6 is also in a standby state corresponding thereto.

Therefore, in this standby state, the lid member 6
The steel ball 21 protruding from the upper surface of the rotating member 4 is located in the concave portion 25 in the rotating direction front of the two concave portions 25 provided on the inner surface of the upper surface of the cover member 6 and the rotating member. 4 is linked.

In this standby state, the nozzle 5a on the front side in the rotation direction
Is separated from the wall portion 23 of the rotary member 4 and the valve 17 provided on the rotating member 4 (see FIG. 9).

When the lid member 6 rotates integrally with the wiper blade from the above state (clockwise in FIG. 9), the concave member 25 and the steel ball 21 engage with the lid member 6 and the rotating member 4 to interlock. In this state, the rotating member 4 is integrally and drivenly rotated in conjunction with the lid member 6.

Therefore, at this time, the flow path 8 provided in the base 3 has a space 34 formed between the lower plate 31 provided on the upper surface of the base 3 and the lower surface of the rotating member 4, and the flat portion of the rotating member 4.
It passes through the arc-shaped groove 14 provided in 13, the wall 23, and the front surface of the valve 17 and communicates only with the nozzle 5 a on the front side in the rotation direction.

Therefore, it is possible to spray water only from the nozzle 5a on the front side in the rotation direction of the two nozzles 5a and 5b provided on the lid member 6, and the sprayed water is immediately wiped by the wiper blade.

At this time, the nozzle 5b on the rear side in the rotating direction is closed by a rubber valve 17 urged by a spring 16, and
Since water pressure acts on the rear side of the space 17 through the cavity 12, even if the biasing force of the spring 16 is small, the injection of water from the nozzle 5b is completely prevented.

Immediately before reaching the end of the rotation area, the upstanding piece 11 of the base 3 located in the arc-shaped groove 14 of the rotation member 4 comes into contact with the end of the groove 14, The interlocking prevention mechanism operates to prevent the interlock between the lid member 6 and the rotating member 4, and further driven rotation of the rotating member 4 is prevented.

In this case, since the rotation of the wiper blade is not at the end, the lid member 6 is further rotated, but the rotation of the lid member 6 is caused by the steel projecting from the upper surface of the rotating member 4. The movement is allowed by moving from the concave portion 25 with which the ball 21 is engaged to the concave portion 25 on the rear side in the rotation direction.

That is, when the lid member 6 moves with respect to the rotating member 4, the steel ball 21 moves between the concave portions 25, 25, and is therefore opened by the valve 17 of the nozzles 5a, 5b. The nozzle 5a on the front side in the rotating direction that was closed was closed, and the wall portion 23 of the nozzle 5b on the rear side in the closed rotating direction was separated from the front surface of the valve 17, and this time the rotating direction was changed. Only the rear nozzle 5b is opened.

In this case, the rotating torque required when the steel ball 21 moves between the two concave portions 25, 25 is a spring for urging the steel ball 21.
It can be determined by the biasing force of 20 and the shape of the recess 25.

Further, the distance before the end of the rotation area of the wiper blade is switched is determined by an arc-shaped groove provided in the rotation member 4.
In this embodiment, the relationship between the arc-shaped groove 14 and the upright piece 11 is changed so as to be switched about 10 ° before the terminal end. The distance between the two recesses 25, 25 provided in the lid member 6 is naturally determined so as to match the determined value.

Then, when the wiper blade reaches the end of the rotation area and starts to rotate in the opposite direction (counterclockwise direction in FIG. 9), the nozzles 5a and 5b have already been switched. Only the nozzle 5b on the front side in the direction sprays water, and the sprayed water is immediately wiped by the wiper blade.

Therefore, the relationship between the nozzles 5a and 5b for injecting water and the rotation area is as shown in FIG. 10, and the rotation direction rearward from the nozzle 5a in the rotation direction before the end of the rotation area indicated by the solid line. Is switched to the nozzle 5b, so that water droplets and dirt attached to the glass surface can be reliably wiped off, and this is the same even when rotating in the opposite direction indicated by the broken line. It is.

〔The invention's effect〕

Since the present invention is configured as described above, the sealing performance can be ensured without applying a large pressing force, and the sealing performance can be ensured without requiring a sliding portion. Even if each member is formed using a resin or the like, there is no possibility that abrasion or the like will occur.

Further, since the injection of the nozzle in the rotation direction is stopped immediately before reaching the end of the rotation area, the sprayed water droplets are not completely wiped off, and can be reliably removed.

In addition, the torque required for switching the nozzles is small, so that the durability is improved, and the number of parts is small, so that the number of manufacturing and assembling steps can be reduced. I have.

[Brief description of the drawings]

1 to 10 show a wet wiper valve according to the present invention, FIG. 1 is a plan view, FIG. 2 is a view taken along line AA of FIG. 1, and FIG. 3 is FIG. FIG. 4 is a view taken along line BB of FIG. 2, FIG. 4 is a view taken along line CC of FIG.
The figure is a view along the line DD of FIG. 3, the figure 6 is a view along the line EE of FIG. 3, and the figure 7 is a view along the line FF of FIG. FIG. 8 is a schematic view showing the rotating member, and FIG.
The figure shows a state in which one nozzle is open in the state shown in FIG. 3, FIG. 10 shows the relationship between the rotation area and the injection of the nozzle, and FIG. 11 schematically shows a conventional wet wiper valve. FIG. 1, 50 wet wiper valve 2, 51 shaft 3 base 4, 56 rotating member 5a, 5b, 7, 55 nozzle 6 cover member 8 flow path 9 center Hole 10 Projecting part 11 Standing piece 12, 18, 34 Empty 13 Flat part 14 Arc-shaped groove 15 Standing part 16, 20 Spring 17 Valve 19, 25 ... recess 21 ... steel ball 22 ... hanging part 23 ... wall 24 ... cylindrical part 30 ... packing 31 ... lower plate 32 ... washer 33 ... upper plate 52 ... wiper blade 53 ... Pivot holder 54 Projection 57 Plates 58, 59, 60 Hole 61 Shaped washer 62 Wave washer

Claims (3)

(57) [Claims] 1. A nozzle (5a, 5b) located on both sides of the wiper is rotated while spraying water while rotating integrally with a wiper mounted on a shaft (2) reciprocated via a link mechanism. A wet wiper valve (1), the wet wiper valve (1) comprising:
With the shaft (2) inserted through the center, a space (34) is formed between the base (3) having the flow path (8) opening from the bottom to the top and the base (3). A rotating member (4) provided with two valve members (16, 17);
The rotating member (4) is in a state of being covered, and is reciprocally rotatable integrally with the wiper, and is further opened and closed by a valve member (16, 17) of the rotating member (4) on a side surface. , A lid member (6) provided with two nozzles (5a, 5b) whose opening and closing are opposite to each other are sequentially arranged from below to above, and further, the rotating member (4) and the lid member (6) are arranged. ) And an interlocking mechanism (11, 14) between the base (3) and the rotating member (4). When the cover member (6) is integrally rotated when the wire is rotated by the shaft (2), the rotating member (4) is also integrally formed by the interlocking mechanism (19, 20, 21, 25). At this time, only the nozzle (5a) in the front of the rotation direction is communicated with the flow path (8) of the base (3), and the connection is made short of the end of the rotation area. Blocking mechanism (11, 1
A wet wiper valve characterized in that 4) operates to open only the nozzle (5b) behind the turning direction. 2. An interlocking mechanism (19, 20, 21, 25) provided between the rotating member (4) and the lid member (6) includes a recess provided on the upper surface of the rotating member (4). (19) A steel ball (21) urged upward by a spring (20) provided therein and two steel balls (21) provided at a predetermined interval on the inner surface of the lid member (6). ) Comprises a positionable recess (25), and only when the steel ball (21) is located in the recess (25),
The wet wiper valve according to claim 1, wherein the lid member (6) and the rotating member (4) are interlocked. 3. An interlocking prevention mechanism (11, 14) provided between the base (3) and the rotating member (4) includes an upright piece (11) projecting from an upper surface of the base (3). An arc-shaped groove (14) provided in the rotating member (4) and in which the upstanding piece (11) is located
While the interlocking mechanism (19, 20, 21, 25) rotates the lid member (6) and the turning member (4) integrally, the upright piece of the base (3) is formed. When the interlock prevention mechanism (11, 14) is actuated by contacting the end of the arc-shaped groove (14) of the rotating member (4) with the interlock mechanism (19, 20, 2).
1 and 25), and the interlocking mechanism (19, 20, 2)
The wet wiper valve according to claim 1, wherein the steel ball (21) of (1, 25) is moved from the concave part (25) on the front side in the rotation direction to the concave part (25) on the rear side.