JPH0556694U - Vehicle wiper device - Google Patents

Abstract

(57) [Abstract] [Purpose] The object of the present invention is to reduce the reversing sound of the wiper device, effectively absorb the abnormal load impact applied to the wiper device, and continuously operate the wiper device even under the abnormal load. It is to provide a wiper device for a vehicle. [Structure] The first link rod 13 and the first pivot lever 14 are connected to each other via a segment lever 15.
A first connecting portion 21 pivotally supported by the pivot lever 14 and a second connecting portion 2 separated from the first connecting portion 21.
2 and the second connecting portion 22 has a cushioning material 1 on the outer periphery.
It is fixed by the second connecting pin 14c in which 0 is arranged.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a vehicle wiper device, and more particularly to a vehicle wiper device capable of absorbing a wiper reversing sound in the wiper device and an abnormal impact load applied to the wiper device.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, a vehicle wiper device has a problem such as a reversing sound and an abnormal noise caused by an abnormal load impact applied to the wiper device. At the end of the wiping range, the reversing sound is caused by the wiper arm and wiper blade suddenly stopping and moving in the opposite direction, causing the lip portion of the blade rubber to sharply incline in the opposite direction, and the lip portion of the blade rubber. The edge of the wiper strikes the surface of the wiping glass, causing vibrations on the surface of the wiping glass, and the direction of movement of the link rod suddenly changes when the wiper arm reverses. It is considered that one of the causes is an abnormal noise generated by collision of each member between the connecting portions of each link member constituting the.

As a countermeasure against the reversing sound in the above-mentioned wiper device, mainly, by devising the cross-sectional shape of the blade rubber of the wiper blade and making the blade rubber a hollow rubber, the shock at the time of reversing is absorbed and the reversing sound is reduced. The technology etc. which aim at are proposed. Also, for the wiper device as a whole, there have been proposed technologies such as suppressing backlash in the motor part to suppress the generation of abnormal noise, and reducing the number of rotations in the vicinity of reversal to reduce the generation of abnormal noise. ..

On the other hand, regarding abnormal load impact caused by, for example, narrowing of the wiping range of the wiper arm and the wiper blade during snowfall, a technique in which a clutch mechanism is provided on the crank arm to absorb this impact (for example, Japanese Patent Laid-Open No. 59-532 57), a technique in which a damper case is provided on a link rod (Japanese Utility Model Laid-Open No. 1-152864), a switching lever is provided at a link segment, and a wiping angle when a load is applied by a spring force. There are various proposed techniques such as a technique for changing over the crankshaft (JP-A-1-136851), a technique for providing a crank arm with a link mechanism and changing the pitch of the crank lever (JP-A-1-122756). It

[0005]

[Problems to be solved by the device]

 However, with the technique in which the blade rubber is a hollow rubber, even if it is possible to reduce the reversal sound, inconvenience occurs in the wiping performance, and there is no solution especially for abnormal load impact. In addition, the technology that suppresses the occurrence of abnormal noise by reducing the backlash in the motor section, and the technology that reduces the number of rotations near the reversal to reduce the occurrence of abnormal noise requires considerable precision in manufacturing. However, there is an inconvenience that the number of parts is significantly increased and the cost is significantly increased.

Further, as described above, a technique of providing a clutch mechanism on the crank arm, a technique of providing a damper case on the link rod, and a switching lever on the link segment so that the wiping angle can be switched when a load is applied by the force of the spring. In all of the above technologies, springs are used, and there was a problem that the wiper device itself became large and the cost increased because it was necessary to secure the space for arranging these springs. ..

Further, in the technique of providing the link mechanism on the crank arm and changing the pitch of the crank lever, there is a problem that a special link mechanism needs to be added in addition to the general link. There were inconveniences such as the device itself becoming large and the cost increasing.

As described above, the conventionally proposed technique not only causes a complicated mechanism and requires a large installation space for the wiper device, but also causes an increase in weight and also reduces the reversing sound of the wiper device. It has not been possible to effectively solve the abnormal load impact on the wiper device at the same time.

An object of the present invention is to provide a vehicle wiper device capable of reducing reverse sound of the wiper device, effectively absorbing an abnormal load impact applied to the wiper device, and continuously operating the wiper device even under an abnormal load. To do.

Another object of the present invention is to reduce the number of parts and the installation space, reduce the reversing sound of a wiper device that is easy to assemble and inexpensive, and effectively absorb the abnormal impact load applied to the wiper device. To provide a device.

[0011]

[Means for Solving the Problems]

 A vehicle wiper device according to the present invention includes a crank arm connected to a wiper motor, a link rod connected to the crank arm, a pivot lever connected to the link rod, and a pivot lever and a pivot shaft. In a vehicle wiper device including a connected wiper arm, at least one of the connection between the crank arm and the link rod and the connection between the link rod and the pivot lever is connected via a segment lever. Therefore, the connection by the segment lever is formed by a first connecting portion pivotally supported on the connected side and a second connecting portion spaced from the first connecting portion. The second connecting portion is fixed to the connected side by a pin having a cushioning material on the outer periphery.

Further, it is preferable that the pin forming the second connecting portion is assembled with the cushioning material at an eccentric position, and the cushioning material is preferably provided with a means for increasing the surface area.

[0013]

[Action]

 According to the present invention, at least one of the connection between the crank arm and the link rod and the connection between the link rod and the pivot lever is connected via the segment lever as described above, and the connection by the segment lever is connected to the connected side. It is composed of a first connecting portion rotatably pivotally supported and a second connecting portion spaced apart from the first connecting portion. The second connecting portion has a cushioning material on the outer periphery. Since the pin is arranged so as to be fixedly attached to the connected side, the segment lever and the connected side can rotate with respect to the first connecting portion, but the second connecting portion has a cushioning material on the outer periphery. The segment lever can be moved to the connected side within the range in which the pin deforms the cushioning material because it is fixed by the pin with the cushioning material.This cushioning material reduces reversal noise and prevents abnormal load impact on the wiper device. And thus it can be absorbed into effect.

That is, to explain based on the first embodiment, as shown in FIGS. 1 to 3, the segment lever 15 and the first pivot lever connected by the first connecting portion 21 and the second connecting portion 22 are connected. Although 14 integrally swings according to the movement of the first link rod 13, the segment lever 15 and the first pivot lever 14 can move within the compression deformation range of the cushioning material 10. Therefore, the impact when the wiper arm 16a and the wiper blade 16b are reversed can be absorbed by the deformation range of the cushioning material 10, so that the shock is suddenly stopped at the end position of the wiping range and is opposite to the conventional one. The movement of hitting the surface of the wiping glass can be mitigated by the lip and edge of the blade rubber that occurs when moving in the direction.

Next, the case where the wiping range is narrowed due to snowfall or the like and an abnormal load is applied will be described. The wiper arm 16a and the wiper blade 16b receive a force from the first link rod 13 near the end of the wiping range. In addition, turning force is generated in the segment lever 15 that is connected to the first pivot lever 14. At this time, since the wiper arm 16a is restrained by snow or the like, the rotation of the first pivot lever 14 is blocked. However, the segment lever 15 rotates about the first connecting portion 21 within a range in which the second connecting pin 14c compresses the cushioning material 10 and moves. As a result, the driving side ball pin 15a, which is the connection point between the segment lever 15 and the first link rod 13, moves, so that the first pivot shaft 14a and the segment lever 15 and the first link rod 13 move. The pitch of the driving-side ball pin 15a, which is the connecting point, changes from P1 to P2, which allows the crank arm 12 of the wiper motor M to rotate by a predetermined amount. As described above, even if the wiping range is narrowed due to snowfall or the like and an abnormal load is applied, it is possible to prevent the wiper device from stopping due to the deformation of the cushioning material 10.

As described above, the first connecting portion pivotally supported on the connected side and the pin to which the cushioning material is arranged on the outer periphery at a distance from the first connecting portion Since the connection portion is fixed to the side, the impact applied to the wiper device is absorbed, the reversal sound is reduced, and the operation of the wiper device can be secured even in the case of an abnormal load.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The parts, arrangements, etc. described below do not limit the present invention and can be variously modified within the scope of the present invention.

1 to 4 show a first embodiment of the present invention. In a vehicle wiper device S of this embodiment, an output shaft 11 of a wiper motor M and one end side of a crank arm 12 are connected. A ball pin 12a is attached to the other end of the crank arm 12, and the ball pin 12a and one end of the first link rod 13 are connected to each other. The other end of the first link rod 13 is connected to the first pivot lever 14 via a segment lever 15. That is, the driving side ball pin 15a is formed on the segment lever 15 of this example, and the driving side ball pin 15a and the end side of the first link rod 13 are connected. The segment lever 15 is provided with a first connecting hole 15b forming a first connecting portion 21 and a second connecting hole 15c forming a second connecting portion 22 at a position separated from the first connecting hole 15b. ing.

On the other hand, a first pivot shaft 14a is formed on the first pivot lever 14, and is connected to the wiper arm 16a and the wiper blade 16b via the first pivot shaft 14a. The first pivot lever 14 is formed with a driven ball pin 17 projecting to the side opposite to the driving side ball pin 15a, and a first connecting portion 21 is provided at the end opposite to the first pivot shaft 14a. The 1st connection hole 14b which comprises is formed. In this example, the second connecting pin 14c forming the second connecting portion 22 is fixed at a position between the first connecting hole 14b and the first pivot shaft 14a so as to project toward the segment lever 15 side.

The second connecting pin 14c is formed smaller than the second connecting hole 15c formed in the segment lever 15 described above. A second link rod 18 is connected to the driven ball pin 17, the second link rod 18 is connected to a second pivot lever 19, and is connected to a wiper arm 16a and a wiper blade 16b via a second pivot shaft 19a. ing.

A first connecting pin 21a is provided in each of the first connecting holes 14b and 15b formed in the first pivot lever 14 and the segment lever 15, so that the first pivot lever 14 and the segment lever 15 are connected to each other. It is rotatably supported. Further, a cushioning material 10 is provided in a second connecting hole 15c formed in the segment lever 15.

As shown in FIGS. 3 and 4, the cushioning material 10 of this example has a columnar shape, has a through hole 10a into which the second connecting pin 14c is mounted, and an outer periphery of which is a segment lever. A fitting portion 10b having a diameter substantially the same as that of the second connecting hole 15c of 15 and a diameter larger than and continuous with the fitting portion 10b is formed between the segment lever 15 and the first pivot lever 14. And a retaining portion 10c. The material of the cushioning material 10 of this example is an elastic member such as rubber or synthetic resin. It is also possible to reduce the noise generated by adjusting the hardness of the rubber and the synthetic resin forming the cushioning material 10 to absorb the vibration of the wiper device or change the frequency.

Then, the cushioning material 10 is press-fitted into the second connecting hole 15 c of the segment lever 15 so as not to form a gap, and the through hole 10 a of the cushioning material 10 and the second connecting pin 14 c of the first pivot lever 14 are connected. Fitted and fixed. In other words, the second connecting pin 14c and the cushioning material 10 are arranged in the second connecting hole 15c of the segment lever 15 to fix the first pivot lever 14 and the segment lever 15. The movement of the segment lever 15 with respect to the first pivot lever 14 is restricted by the second connecting portion 22 thus configured.

In the above-mentioned cushioning material 10, an example in which the retaining portion 10c is formed is shown, but as shown in FIG. 5, for example, the retaining member 10c may be formed of a columnar body without forming the retaining portion 10c. In the example of FIG. 5, the washer 31 and the C ring 32 are used so that the cushioning material 10 does not fall off.

As shown in FIG. 6, the cushioning material 10 can be formed by providing holes 23 and grooves 24 on the surface. As shown in FIG. 6, the damping effect can be made more effective by increasing the surface area of the cushioning material 10.

Next, the operation of the wiper device S having the configuration shown in the above embodiment will be described with reference to FIG. When the wiper motor M operates, the output shaft 11 of the motor M rotates and the first link rod 13 reciprocates through the crank arm 12, so that the first pivot lever 14 moves around the first pivot shaft 14a. Is rotated to. The pivotal movement of the first pivot lever 14 is transmitted to the second pivot lever 19 via the second link rod 18, and the second pivot lever 19 is rotated about the second pivot shaft 19a.

When the wiper arm 16 a and the wiper blade 16 b are reversed, the first pivot lever 14 connected to the first pivot shaft 14 a is arranged at the second connecting portion 22 of the segment lever 15 so that the first pivot lever 14 is connected to the first pivot shaft 14 a. Since the cushioning material 10 can be moved and absorbed in the deformation range of the cushioning material 10, when the wiper arm 16a and the wiper blade 16b suddenly stop at the end position of the wiping range and move in the opposite direction as in the conventional case. The action of hitting the surface of the wiping glass is mitigated by the lip and edge (not shown) of the blade rubber.

When the wiping range is narrowed due to snow or the like and an abnormal load is applied, the force from the first link rod 13 is applied to the wiper arm 16a and the wiper blade 16b near the end of the wiping range, and the first pivot lever 13a is applied. A turning force is generated in the segment lever 15 which is connected to 14. At this time, since the wiper arm 16a is restrained by snow or the like, the rotation of the first pivot lever 14 is blocked. However, the segment lever 15 rotates around the first connecting portion 21 by a predetermined angle (predetermined distance) α ° while compressing the cushioning material 10 of the second connecting portion 22. As a result, the position of the driving side ball pin 15a, which is the connection point between the segment lever 15 and the first link rod 13, moves from the point A to the point B, so that the first pivot shaft 14 and the segment lever 15 and The pitch between the driving side ball pins 15a, which is the connection point with the first link rod 13, changes from P1 to P2. As a result, the first link rod 13 and the crankshaft 11 of the wiper motor M can be moved (rotated) from the point C to the point D by a predetermined angle (predetermined distance) β °, and the wiper device can be continuously operated.

The predetermined angles (predetermined distances) α ° and β ° can be set in various ways depending on the type of the cushioning material 10, which makes it possible to protect the wiper device against an abnormal load. In the above case, when the cushioning material 10 is largely deformed with respect to the load acting during normal operation, the wiping range is changed, but in order to avoid this, the size, hardness, material, etc. of the cushioning material 10 are changed. Then, set so that it does not affect the normal wiping operation.

In the above embodiment, the example in which the segment lever 15 and the second connecting portion 22 are formed in the connection with the first pivot lever 14 is shown, but it may be formed on the second pivot lever 19 side. Of course, in this case as well, the configuration can be made similar.

7 to 9 show a second embodiment of the present invention, FIG. 7 is a perspective view of a cushioning material 10 and a pin used for a second connecting portion, and FIGS. 8 and 9 are operation explanatory views. Is. In this example, the same members as those in the above-mentioned example are designated by the same reference numerals, and the description thereof will be omitted. Although the through-hole 10a of the cushioning material 10 is formed substantially in the center of the cushioning material 10 in the above-mentioned embodiment, an example in which the through-hole 10a is formed off the center of the cushioning material 10 is shown in this example. It is shown. That is, as shown in FIG. 7, the second connecting pin 14c is formed so as to be located at different distances L1 and L2 from the outer peripheral position of the cushioning material 10, and a long distance is provided in a direction in which sound is desired to be prevented, for example, on the upper reversal side. The distance L1 is set to a direction in which the movement amount of the second connecting pin 14c is reduced, in other words, the direction in which the play is reduced is set to the short distance L2.

In this way, as shown in FIG. 8, when the wiper arm 16a and the wiper blade 16b are turned down, the impact is absorbed on the L2 side, and when the wiper arm 16a and the wiper blade 16b are turned upside, the impact is absorbed on the L1 side as shown in FIG. Can absorb shock. According to this example, the reversing sound and the shock absorption can be more effectively achieved according to the compression distance of the cushioning member 10, that is, the moving distance of the second connecting pin 14c.

FIG. 10 is an explanatory diagram showing the third embodiment. Also in this example, the same members as those in the first example are designated by the same reference numerals, and the description thereof will be omitted. In this example, an example applied to the connection between the crank arm 11 and the first link rod 13 is shown. That is, one end of the segment lever 33 and the crank arm 11 are rotatably pivoted by the same structure as the first connecting portion 21, and the second connecting portion 21 is provided at a position separated from the first connecting portion 21. .. The second connecting portion 22 has the same structure as that of the above-described embodiment, but in this embodiment, the shape of the cushioning material 10 is columnar with an elliptical cross section. A ball pin 34 is formed at the end of the segment lever 33, and the ball pin 34 connects the first link rod 13.

With the configuration as in this example, the compression distance of the cushioning material 10 can be increased as compared with the case where the cushioning material 10 is formed into a cylindrical shape. Other functions and the like are the same as those in the above embodiment. In each of the above-mentioned embodiments, the connection between the crank arm and the link rod and the connection between the link rod and the pivot lever have been described, but it goes without saying that they can be arranged at a plurality of positions in these connections at the same time.

[0035]

[Effect of the device]

 As described above, the first connecting portion pivotally supported on the connected side and the connected side by the pin provided with the cushioning material 10 on the outer periphery at a distance from the first connecting portion. Since the connecting portion is fixedly attached, the impact applied to the wiper device can be absorbed to reduce the reversal sound, and the operation of the wiper device can be secured even in the case of an abnormal load.

[Brief description of drawings]

FIG. 1 is an operation explanatory view showing a first embodiment of a wiper device according to the present invention.

FIG. 2 is an explanatory plan view of the connecting means in the first embodiment.

3 is an explanatory side view of FIG.

FIG. 4 is a cross-sectional view of an essential part of a second connecting portion of FIG.

FIG. 5 is a main-portion cross-sectional view showing another example of the second connecting portion in the first embodiment.

FIG. 6 is a perspective view showing another example of the cushioning material 10 in the first embodiment.

FIG. 7 is a perspective view of a cushioning member 10 and a pin used for the second connecting portion according to the second embodiment of the present invention.

FIG. 8 is an operation explanatory view of the second embodiment.

FIG. 9 is an operation explanatory view of the second embodiment.

FIG. 10 is an explanatory diagram showing a third embodiment.

[Explanation of symbols]

 10 Buffer Material 10a Through Hole 12 Crank Arm 13 First Link Rod 14 First Pivot Lever 14a First Pivot Shaft 14b First Connection Hole 14c Pin (Second Connection Pin) 15 Segment Lever 15b First Connection Hole 15c Second Connection Hole 16a Wiper arm 16b Wiper blade 18 2nd link rod 19 2nd pivot lever 19a 2nd pivot shaft 21 1st connection part 21a 1st connection pin 22 2nd connection part 23,24 Means (hole, groove) for increasing surface area M Wiper motor S Vehicle wiper device

Claims (3)

[Scope of utility model registration request] 1. A crank arm connected to a wiper motor, and a link rod connected to the crank arm,
In a vehicle wiper device including a pivot lever connected to the link rod and a wiper arm connected to the pivot lever via a pivot shaft, a connection between the crank arm and the link rod, a link rod and a pivot lever Is connected via a segment lever, and the connection by the segment lever includes a first connecting portion pivotally supported on the connected side and A second connecting portion spaced apart from the first connecting portion, the second connecting portion comprising:
A vehicle wiper device characterized in that it is fixed to the connected side by a pin having a cushioning material arranged on the outer periphery. 2. The vehicle wiper device according to claim 1, wherein the pin forming the second connecting portion is assembled with the cushioning material at an eccentric position. 3. The vehicle wiper device according to claim 1, wherein the cushioning member is provided with means for increasing a surface area.