JPH04146856A - Wet wiper valve - Google Patents

Abstract

PURPOSE:To certainly carry out wiping of jetted water by jetting water from a nozzle on the front side in the turning direction at the time when a wiper turns, and by jetting water from another nozzle by changing the former' nozzle to the latter nozzle before the end edge of turning. CONSTITUTION:When a lid member 6 turns with a wiper blade by a shaft 2, a turning member 4 is turned slavishly, and a flow passage 8 provided on a base part 3 is communicated through only to a nozzle 5a on the front side in the turning direction through a space 34 formed between a lower plate 31 and the turning member 4, a circular arc groove 14 provided on the turning member 4 and others, and water is jetted from this nozzle 5a only. Thereafter, when a standing piece 11 of the base part 3 makes contact with the edge part of the groove 14, interlocking of the lid member 6 and the turning member 4 is blocked and only the lid member 6 moves, the nozzle 5a opened by a valve 17 is choked and a nozzle 5b on the rear side in the turning direction is separated from the front surface of the valve 17, only the nozzle 5b is released and water is jetted only from this nozzle 5b.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a wet wiper valve, and in particular, a wet wiper valve that rotates together with a wiper used to wipe the glass surface of an automobile, etc., and sprays water, etc. onto the glass surface. This relates to wet wiper valves used for

[Prior art and problems to be solved] Conventionally, wiper blades are installed on the glass surface of automobiles and used to wipe away water droplets. Among the wet wiper valves, the one shown in FIG. 11 is known.

That is, the wet wiper valve 50 shown in FIG.
In this case, the shaft 51 is rotated back and forth via a link mechanism.
A wiper blade 52 is provided on the upper part of the shaft 51.
The wet wiper valve 50 is provided with the wet wiper valve 50 inserted therethrough.

The wet wiper valve 50 has a pivot holder 53 at its lower part, and engages with the protrusion 54 of the wiper blade 52 at its upper part to rotate back and forth as a unit, and sprays water located on both sides of the wiper blade 52. It has a rotating member 56 having a pair of nozzles 55,55.

A plate 57 is provided between the rotating member 56 and the pivot holder 53, and this plate 57 slides against the lower surface of the rotating member 56 when the wiper blade 52 rotates. , pivot holder 5
3 hole 58, hole 59 of plate 57, and rotating member 5
Water is alternately injected from the nozzles 55, 55 through holes 60 provided in 6.

In the conventional wet wiper valve 50 configured as described above, water leakage is prevented from occurring between the pivot boulder 53 and the plate 57 and between the plate 57 and the rotating member 56. The rotating member 56 is pressed by a deformed washer 61, a wave washer 62, etc. to prevent leakage when sliding between the pivot holder 53 and the plate 57 and between the plate 57 and the rotating member 56. It looks like this.

However, with the above configuration, the sliding surface requires high-precision surface machining, and a large pressing force is applied to ensure the sealing performance of the sliding surface, making it difficult to rotate the wiper blade back and forth. It requires a large torque, and since there are many sliding parts, there is a lot of abrasion powder, resulting in poor durability.Furthermore, the number of convex points increases, making assembly work complicated, and the overall cost increases. It had the problem of being stored away.

The purpose of this invention is to be able to seal reliably, reduce the number of sliding parts and perform reciprocating rotation with low torque, and furthermore, reduce the total number of parts and facilitate assembly. An object of the present invention is to provide a wet wiper valve that can facilitate work.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides, as a first invention, a wiper that rotates integrally with a wiper that is attached to a shaft that rotates reciprocally through a link mechanism. , a wet wiper valve that sprays water by switching nozzles located on both sides of the wet wiper, and this wet wiper valve opens from the bottom to the top with the shaft inserted through the center. A base having a flow path and a rotary member that forms a space between the base and is provided with two valve members, and a rotary member that covers the rotary member and reciprocates integrally with the wiper. The lid member is rotatable and further includes a lid member provided with two nozzles which are opened and closed by a valve member of the rotary member and whose opening and closing are opposite to each other, sequentially arranged from the bottom to the top. Further, an interlocking mechanism is disposed between the rotating member and the lid member, and an interlocking prevention mechanism is disposed between the base and the rotating member, so that when the wiper is rotated by the shaft, the lid is rotated. When the members rotate together, the rotating member also rotates together due to the interlocking mechanism, and at this time, only the nozzle at the front in the rotation direction communicates with the flow path at the base, and the nozzle at the end of the rotation area communicates with the flow path at the base. This wet wiper valve is characterized in that the interlocking prevention mechanism operates at the front to open only the nozzles at the rear in the rotating direction.

As a second invention including the first invention, an interlock l! provided between the rotating member and the lid member! The bridge includes a steel ball that is biased upward by a spring provided in a recess provided on the upper surface of the rotating member, and two steel balls placed at a predetermined interval on the inner surface of the lid member.
and a recessed portion in which the steel ball can be positioned, and the lid member and the rotating member are configured to interlock with each other only when the steel ball is located in the recessed portion. It is something.

As a second invention including the first invention, the interlocking prevention mechanism provided between the base and the rotating member includes an upright piece protruding from the upper surface of the base, and a linkage preventing mechanism provided on the rotating member. and an arc-shaped groove in which an upright piece is located, and while the lid member and the rotating member are rotating together by the interlocking mechanism, the upright piece of the base moves into the arc-shaped groove of the rotating member. A wet wiper valve that blocks the operation of the interlocking mechanism when the interlocking blocking am is activated by coming into contact with the end of the groove, and at this time moves the steel ball of the interlocking mechanism from the forward recess in the rotation direction to the rear recess. It is composed of

[Effect]

By adopting the above means, this invention can spray water from the nozzle on the front side in the rotation direction when the wiper rotates, and can also switch the nozzle before the end of rotation and spray from the other nozzle. do.

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

In addition, the nozzle is switched by a valve provided on a rotating member that rotates within a predetermined range together with the wiper.
Moreover, at the time of this switching, the required force is sufficient to switch the recessed portion in which the steel ball is located, so the required torque may be small.

[Example] Embodiments of the invention shown in the drawings will be described below.

1 to 10 show a wet wiper valve 1 according to the present invention, and the wet wiper valve 1 is arranged with a shaft 2 inserted through it, which is rotated back and forth by a link mechanism like the conventional wet wiper valve 1. It is now set up.

This wet wiper valve 1 includes a base 3 that is fixed to a fixed part of an automobile or the like, a rotating member 4 that is provided on the upper surface of this base 3 and is rotatable, and covers the rotating member 4. , and a lid member 6 provided with two nozzles 5a and 5b on the side surface.

The base 3 opens from its lower surface to its upper surface, and
It 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 bored in the center.

Further, an annular protrusion 10 is formed on the upper surface, and
An upright piece 11 is provided to protrude from a part of this protrusion lO.

The rotating member 4 has a ring shape with a predetermined thickness and a hollow space 12 formed inside by two members welded or glued together, as shown in FIG. A flat portion 13 is formed in this flat portion 13, and an arcuate groove 14 is formed in the flat portion 13 to receive the upright piece 11 of the base portion 3.

Further, as shown in FIG. 5, rubber valves 17, 17 are provided on the upright portions 15, 15 on both sides of the flat portion 13, respectively, and are biased to a predetermined protruding state by a spring 16. Space 18.1 behind both valves 17.17
8 communicates with the cavity 12.

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

The lid member 6 has a cylindrical shape with a closed top surface, and has nozzles 5a in 2202 hanging portions of the cylindrical shape that communicate with the inside.
5b is provided.

Moreover, wall portions 23.23 are formed inside so as to communicate with both nozzles 5a and 5b, respectively, and these wall portions 23.23.
23 has a protruding amount parallel to the front surface of the bulb 17.17 so that its inner end comes into contact with the front surface of the bulb 17.17.

Furthermore, a cylindrical portion 24 through which the shaft 2 is inserted is integrally provided at the center of the upper surface of the first member 6 .

Further, the rotary member 4 is provided on the inner surface of the upper surface' of the lid member 6.
A second recess 25 receives a steel ball 21 which is projected by a spring 20 from within the recess 19 opening on the top surface.
．． 25 are provided at predetermined intervals.

The recess 19 formed in the rotating member 4 and the spring 20
The steel ball 21 and two recesses 25.25 formed on the inner surface of the upper surface of the lid member 6 form an interlocking mechanism.

Although not shown, the lid member 6 is provided with a retaining portion for engaging with a part of the wiper blade, similar to the conventional one, and the wiper blade rotates through the shaft. It is designed to rotate together when it is operated.

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

Further, a lower plate 31 is located on the upper surface of the annular projection 10 of the base 3, and the lower plate 31 has an upright piece 11 that projects from a part of the upper surface of the annular projection 10 of the base 3. There is a hole drilled into it.

Further, a washer 3 is provided on the upper surface of the lower plate 31.
2, an upper plate 33 is connected to the cylindrical portion 24 of the lid member 6 through a spline connection.

The rotating member 4 is located on the upper surface of this upper plate 33, and the base 3-' is located in the arc-shaped groove 14 provided in the flat part 13 of the rotating member 4.
The upright piece 11 is located.

Therefore, the rotating member 4 is rotatable with respect to the base 3 within the range where the end of the arc-shaped groove 4 comes into contact.

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

Further, the lid member 6 is attached such 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 inserted into the center portion of the rotating member 4 and the annular shape of the base 3. The outer hanging portion 22 of the lid member 6 hangs outside the annular projection 10 of the base 3, and the space between them is sealed by the puncture 30.30. It has become.

In addition, in the assembled state, the two nozzles 5a and 5b provided on the lid member 6 are installed so as to be located on both sides of the wiper blade, and each nozzle 5a and 5b is attached to the central part of the wiper blade. By connecting to a pipe that opens at , it is possible to spray washer fluid or the like from the center of the wiper blade.

When the rotational force of the link mechanism (not shown) is transmitted through the shaft 2, the wiper blade attached to the shaft 2 rotates together, and at this time, the lid member 6 also rotates together. move.

Note that before the wiper blade is rotated, the wiper blade is on standby in a state located in one of the rotation ranges, and therefore, the lid member 6 is also on standby in a state corresponding to the rotation range.

Therefore, in this standby state, a steel ball protruding from the upper surface of the rotating member 4 is placed in the forward recess 25 in the rotating direction of the two recesses 25 and 25 provided on the inner surface of the upper surface of the lid member 6. 21 is positioned so that the lid member 6 and the rotating member 4 are interlocked.

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

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

Therefore, at this time, the flow path 8 provided in the base 3 is connected to the 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 13 of the rotating member 4. The arc-shaped groove 14 provided in the wall portion 23 and the valve 17
It communicates only with the nozzle 5a on the front side in the rotational direction through the front surface of the nozzle 5a.

Therefore, the two nozzles 5a and 5b provided on the lid member 6
Water can be injected only from the nozzle 5a on the forward side in the rotating direction, and the wiper blade immediately wipes off the injected water.

At this time, the nozzle 5b on the rear side in the rotation direction is closed by a rubber valve 17 that is biased by a spring 16, and water pressure is applied to the rear side of the valve 17 via the cavity 12. Therefore, even if the biasing force of the spring 16 is small, water injection from the nozzle 5b is completely prevented.

Then, just before reaching the end of the rotation range, the rotation member 4
The upright piece 11 of the base 3 located within the arc-shaped groove 14 of
comes into contact with the end of the groove 14, and as a result, the interlocking prevention mechanism is actuated to prevent the lid member 6 from interlocking with the rotating member 4, thereby preventing further driven rotation of the rotating member 4. be done.

In this case, since the rotation of the wiper blade has not reached the end, the lid member 6 will be rotated further, but the rotation of the lid member 6 is caused by the steel protruding from the upper surface of the rotation member 4. The ball 21 is allowed to move from the engaged recess 25 to the rear recess 25 in the rotational direction.

That is, when the lid member 6 moves relative to the rotating member 4, the steel ball 21 moves between the recesses 25 and 25, and therefore the valve 17 of the nozzles 5a and 5b is opened. When the nozzle 5a on the front side in the rotational direction, which had been blocked, is closed, the wall portion 23 of the nozzle 5b on the rear side in the rotational direction, which had been blocked, is separated from the front surface of the valve 17, and this time, Only the nozzle 5b on the rear side in the rotation direction is opened.

In this case, the rotational torque required when the steel ball 21 moves between the two recesses 25.25 can be determined by the urging force of the spring 20 that urges the steel ball 21 and the shape of the recess 25. .

Further, how far before the end of the rotation range of the wiper blade should be determined is determined by the arc-shaped groove 1 provided in the rotation member 4.
4 and the upright piece 11 provided on the base 3. In this embodiment, the relationship between the arcuate groove 14 and the upright piece 11 is determined so that the switch is made approximately 10'' before the end. Naturally, the two recesses 25.2 provided in the lid member 6
The interval of 5 is also determined to match this.

When the wiper blade reaches the end of its rotation range and starts rotating in the opposite direction (counterclockwise in FIG. 9), the nozzles 5a and 5b have already been switched, so Only the nozzle 5b on the front side in the direction sprays water, and the wiper blade immediately wipes the sprayed water.

Therefore, the relationship between the nozzles 5a and 5b that inject water and the rotation range is as shown in FIG. The nozzle 5b is switched to the nozzle 5b, and water droplets and dirt adhering to the glass surface can be reliably wiped away, and this is true even when rotating in the opposite direction shown by the broken line. It is.

[Effects of the Invention] With the above configuration, the present invention can ensure sealing performance without applying a large pressing force, and can also ensure sealing performance without requiring a sliding part. Therefore, even if each member is formed using resin or the like, there is no risk of wear or the like.

Furthermore, since the nozzles in the forward direction of the rotation direction stop spraying just before reaching the end of the rotation range, there is no possibility that the sprayed water droplets cannot be wiped off, and can be removed reliably.

Furthermore, since the torque required to switch the nozzle is small, durability is improved, and since the number of parts is small, manufacturing and assembly man-hours can be reduced, improving manufacturing efficiency.
This has the effect of improving assembly work efficiency.

[Brief explanation of drawings]

1 to 10 show a wet wiper valve according to the present invention, FIG. 1 is a plan view, and FIG. 2 is a section A-Am in FIG.
Figure 3 is a view taken along line B-B in Figure 2, Figure 4 is a view taken along line C-C in Figure 2, and Figure 5 is a view taken along line C-C in Figure 2.
The figure is a view taken along line D-D in Figure 3, Figure 6 is a view taken along line E-E in Figure 3, and Figure 7 is a view taken along line FF in Figure 4. Figure 8 is a schematic diagram showing the rotating member, Figure 9 is a schematic diagram showing the rotating member.
The figure shows a state in which one nozzle is open in the state shown in Fig. 3, Fig. 10 shows the relationship between rotation range and nozzle jet, and Fig. 11 schematically shows a conventional wet wiper valve. It is a diagram. 1.50・・・Wet wiper valve 2.51
...Shaft 3...Base 4.56...Rotating members 5a, 5b, 7.55...Nozzle 6...
- Lid member 8... Channel 9... Center hole 10... Projection 11... Upright piece 12.18.34... Vacant space 13... Flat part 14... Arc-shaped groove 15... Standing part 16.20... Spring 17... Hartz 19 .25...Recessed portion 21...Steel ball 22...Descent portion 23...Wall portion 24...Cylindrical portion 30... ...Putskin 3] ...Lower plate 32 ...Wanoshi 33 ...Upper plate 52 ...Wiper blade 53 ...Pivot Holder 54... Protrusion 57... Plate 58, 59, 60... Hole 61... Irregular one-shape 62... Wave Wanonoya

Claims (1)

[Claims] (1) Rotates together with the wiper attached to the shaft (2) which is reciprocated via a link mechanism, and switches the nozzles (5a, 5b) located on both sides of the wiper. This wet wiper valve (1) is configured to spray water through a flow path (1) that opens from the lower part to the upper surface with the shaft (2) inserted through the center part. A cavity (34) is formed between the base (3) having a valve member (8) and the base (3), and two valve members (16
. 4) Valve members (16, 17)
), and is provided with two nozzles (5a, 5b) whose opening and closing are opposite to each other.
are sequentially arranged from the bottom to the top, and the rotating member (
4) and the lid member (6) are interlocking mechanisms (19, 20, 2).
1, 25), and an interlocking prevention mechanism (11, 14) is provided between the base (3) and the rotating member (4) to prevent rotation of the wiper by the shaft (2). At times, when the lid member (6) rotates together, the rotating member (4) also rotates together by the interlocking mechanism (19, 20, 21, 25), and at this time, the front part in the rotation direction Only the nozzle (5a) is communicated with the flow path (8) of the base (3), and the interlocking prevention mechanism (11, 14) is connected just before the end of the rotation range.
) operates to open only the rear nozzle (5b) in the rotating direction. (2) The interlocking mechanism (19, 20, 21, 25) provided between the rotating member (4) and the lid member (6) includes a recess (19, 25) provided on the upper surface of the rotating member (4). ) a steel ball (21) biased upward by a spring (20) provided within the
Two recesses (25) are provided at a predetermined interval on the inner surface of the lid member (6) and the steel balls (21) can be positioned therein, and the steel balls (21) are placed in the recesses (25). 2. The wet wiper valve according to claim 1, wherein the lid member (6) and the rotating member (4) are configured to interlock with each other only when the lid member (6) is located in the wet wiper valve. (3) The interlocking prevention mechanism (11, 14) provided between the base (3) and the rotating member (4) includes an upright piece (11) protruding from the upper surface of the base (3) and the An arcuate groove (1) provided in the rotating member (4) in which the upright piece (11) is located.
4), and the interlocking mechanism (19, 20, 21
, 25), while the lid member (6) and the rotating member (4) are rotating together, the upright piece (11) of the base (3)
When the interlocking mechanism (11, 14) is activated by contacting the end of the arcuate groove (14) of the rotating member (4), the interlocking mechanism (19, 20, 21, 25) is activated. At this time, the steel balls (2) of the interlocking mechanism (19, 20, 21, 25)
1) from the front recess (25) in the rotation direction to the rear recess (2).
5) The wet wiper valve according to claim 1, wherein the wet wiper valve is moved to 5).