JP6605102B1 - Wiper blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper blade capable of appropriately preventing occurrence of undesirable vibration (chatter) during use. An wiping portion (12) of a blade rubber portion (3) of a wiper blade (1) is provided with an extension portion (24) extending outward from a shoulder portion (23). A step 25 is provided between the shoulder 23 and the extension 24, and the extension 24 is made easier to bend than the shoulder 23 by reducing the thickness of the extension 24 by the amount of the step 25. [Selection] Figure 6

Description

  The present invention relates to a wiper blade, and more particularly to an improvement of a wiping member provided in the wiper blade.

  A wiper device used for a vehicle such as an automobile generally includes a wiper arm linked to a drive motor and a wiper blade supported by the wiper arm. Here, the wiper blade includes a support portion connected to the wiper arm and a wiping member supported by the support portion, and the surface to be wiped such as a glass surface of the vehicle is wiped by the wiping member.

  FIG. 14 shows a cross-sectional shape (cross-sectional shape perpendicular to the longitudinal direction) of the wiping member (blade rubber portion 100) in such a conventional wiper blade. As shown in the figure, the blade rubber part 100 includes a main body part 101 held by a support part (not shown), a wiping part 102 that is a part for wiping a surface to be wiped (for example, a glass surface of an automobile), and a main body. A connecting portion 103 that connects the portion 101 and the wiping portion 102 is provided.

  The connecting portion 103 is a portion that is narrower than the main body portion 101 and the wiping portion 102. As a result, when the blade rubber portion 100 moves in the direction perpendicular to the longitudinal direction (the left-right direction in FIG. 14) during wiping, the connecting portion 103 bends left and right, so that the wiping portion 102 is opposite to the wiping progress direction. Inclining (falling), smooth and stable wiping is achieved. FIG. 14 shows a state in which the wiping portion 102 is tilted to the left as a result of the blade rubber portion 100 moving toward the right side of the drawing.

Patent No. 5596107 Patent No. 5,639,671

  In such a blade rubber portion 100, if the pressing force pressing the blade rubber portion 100 against the surface to be wiped is sufficiently large and a sufficient tilt angle is given to the wiping portion 102, the upper end portion (shoulder portion) of the wiping portion 102 is provided. 102A contacts the lower surface 101A of the main body 101. Thereby, the falling angle of the wiping part 102 is stabilized, the wiping part 102 is prevented from falling too much, and the occurrence of vibration is appropriately prevented.

  However, when the pressing force pressing the blade rubber portion 100 against the surface to be wiped is small, a sufficient tilt angle cannot be obtained in the wiping portion 102, and the shoulder portion 102 </ b> A of the wiping portion 102 contacts the lower surface 101 </ b> A of the main body portion 101. (There is such a state shown in FIG. 14). In this case, since the wiping portion 102 is not supported by the main body portion 101, undesirable vibration (chatter) may occur when the blade rubber portion 100 is used.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a wiper blade that can appropriately prevent occurrence of undesirable vibration (chatter) during use.

In this invention, it is provided with a support part and the wiping member supported by the said support part, The said wiping member is a main-body part hold | maintained at the said support part, the wiping part which wipes the to-be-wiped surface, and the said main body And a connecting part that connects the wiping part, and the wiping part can be inclined with respect to the main body part when the connecting part is bent, and the main body part side of the wiping part A shoulder portion extending laterally from the connecting portion, and the shoulder portion can come into contact with the main body portion when the wiping portion is inclined with respect to the main body portion. The wiper blade is provided with an extension part that contacts the main body part before the shoulder part when the wiping part is inclined with respect to the main body part on the outside of the shoulder part, , when in contact with the main body portion, is formed easily bent than the shoulder Ri, the shoulder portion and the stepped portion is provided between said extension portion, said extension portion thickness than the step amount corresponding said shoulder of the stepped portion is small.

  The extension portion may have a hollow portion inside.

  The extension may be made of a material that is more flexible than the shoulder.

  According to the present invention, in the wiper blade (for example, wiper blade 1), the wiping portion (for example, the wiping portion 12) of the wiping member (for example, the blade rubber portion 3) extends outward from the shoulder portion (for example, the shoulder portion 23). Parts (for example, extension parts 24, 30, 35, 40, 45, 50), the extension part is the main body even when the pressing force pressing the wiper blade against the surface to be wiped is small and the wiping part has a small inclination angle. It becomes the state which contacted the part (for example, main-body part 11) reliably, and generation | occurrence | production of the undesirable vibration (chatter) at the time of use of a wiper blade can be suppressed. Further, since the extension portion is configured to bend more easily than the shoulder portion, when the tilt angle of the wiping portion is small, the inclination of the wiping portion can be increased appropriately, while the pressing force increases and the wiping is performed. When the tilt angle of the portion becomes large, the shoulder portion having a large rigidity comes into contact with the main body portion, so that the tilt angle of the wiping portion can be stabilized and the excessive tilt can be effectively prevented.

  Step portions (for example, step portions 25, 31, 36, and 37) are provided between the shoulder portion and the extension portions (for example, the extension portions 24, 30, and 35), and the thickness of the extension portion is larger than the shoulder portion by the level difference of the step portion. If it is made small, it is possible to form an extension portion that is easy to bend (easy to bend) with a simple configuration. Moreover, the easiness of bending of an extension part can be easily adjusted by changing the magnitude | size of the level | step difference of a level | step-difference part.

  If a hollow portion (for example, the hollow portion 51) is provided in the extension portion (for example, the extended portion 50), an extension portion that is easy to bend (easy to bend) without providing a step or a notch on the outer surface of the wiping portion. Can be configured. Moreover, the easiness of bending of an extension part can be adjusted appropriately by changing the magnitude | size and shape of a cavity part.

  If the extension portion (for example, the extension portion 55) is formed of a material having a larger flexibility than the shoulder portion, the extension portion is easily bent (easily bent) without providing a step or a notch on the outer surface of the wiping portion. Can be configured. Moreover, the easiness of bending of an extension part can be adjusted appropriately by changing the material which comprises an extension part.

It is a perspective view which shows a wiper blade. It is a perspective view which shows a part of blade rubber part of the wiper blade in 1st Embodiment of this invention. It is a side view which shows a part of blade rubber part similarly. It is sectional drawing of the blade rubber part which shows the AA cross section of FIG. It is sectional drawing which shows a part of blade rubber part. It is sectional drawing which shows a blade rubber part, and shows the state which the extension part contact | abutted to the main-body part. It is sectional drawing which shows a blade rubber part, and shows the state which the shoulder part contact | abutted to the main-body part. It is sectional drawing which shows a part of blade rubber in 2nd Embodiment of this invention. It is sectional drawing which shows a part of blade rubber in 3rd Embodiment of this invention. It is sectional drawing which shows a part of blade rubber in the reference example of this invention. It is sectional drawing which shows a part of blade rubber in the other reference example of this invention. It is sectional drawing which shows a part of blade rubber in the other reference example of this invention. It is sectional drawing which shows a part of blade rubber in the other reference example of this invention. It is sectional drawing of the blade rubber part in the conventional wiper blade.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows the overall configuration of the wiper blade 1. As shown in the drawing, the wiper blade 1 includes a support portion 2 disposed at a substantially central portion in the longitudinal direction and a blade rubber portion 3 supported by the support portion 2. In addition, the upper part of the support part 2 serves as a coupling part 2A for coupling to a wiper arm (not shown).

  The blade rubber part 3 is a long member made of rubber, for example, and is disposed below the support part 2. When the wiper blade 1 is used, the blade rubber portion 3 is disposed in contact with the surface to be wiped, and the wiped blade 1 is moved along the surface to be wiped, so that the surface to be wiped (for example, the glass surface of the vehicle) is wiped off. It has come to be. End caps 4 are attached to both ends of the blade rubber portion 3 in the longitudinal direction. A wing 5 is disposed over the entire length in the longitudinal direction above the blade rubber portion 3.

  2 to 4 show the blade rubber portion 3 in the first embodiment of the present invention. As shown in the figure, the blade rubber part 3 includes a main body part 11 held by the support part 2, a wiping part 12 disposed on the surface to be wiped, and a connecting part 13 that connects the main body part 11 and the wiping part 12. And. The main body part 11, the wiping part 12 and the connecting part 13 all extend over the entire length of the blade rubber part 3 in the longitudinal direction.

  Grooves 11 </ b> A are formed on both side surfaces of the main body 11 over the entire length in the longitudinal direction. By fitting holding pieces (not shown) of the support portion 2 into these groove portions 11A, the main body portion 11 is held by the support portion 2 so as to be held from both sides by the holding pieces of the support portion 2. It has become so.

  The connecting portion 13 is a portion that is narrower than the main body portion 11 and the wiping portion 12. As a result, when the wiper blade 1 is moved in a direction perpendicular to the longitudinal direction during wiping, the wiping portion 12 falls to the left and right by bending the connecting portion 13 so that appropriate wiping is performed.

  The wiping portion 12 has a cross-sectional shape that tapers downward from the upper end surface 21 on the main body portion 11 side, and comes into contact with the surface to be wiped at the lower end portion 22 having a narrow width. The surface to be wiped is wiped off. On the other hand, both side portions on the upper end side of the wiping portion 12 are shoulder portions 23 projecting sideways in a wing shape. The shoulder portion 23 extends over the entire length of the wiping portion 12 in the longitudinal direction.

  Extenders 24 are integrally provided on the outer edges (left and right edges) of the shoulders 23 on both sides, and extend from the shoulders 23 to the left and right. The extension part 24 extends over the entire length in the longitudinal direction of the wiping part 12, similarly to the shoulder part 23. Thereby, when the wiping part 12 is tilted with respect to the main body part 11 when the wiper blade 1 is used, first, the extension part 24 comes into contact with the lower surface 11B of the main body part 11 and then the inclination of the wiping part 12 is further increased. The shoulder portion 23 comes into contact with the lower surface 11B of the main body portion 11.

  As shown in detail in FIG. 5, a stepped portion 25 is formed on the upper end surface 21 (the upper surface of the shoulder portion 23 and the extension portion 24) of the wiping portion 12 so as to be positioned between the shoulder portion 23 and the extension portion 24. Is formed. The step part 25 forms a step so that the extension part 24 is lower than the shoulder part 23, and the thickness of the extension part 24 in the vertical direction is smaller than the shoulder part 23 by this step part. Thereby, the extension part 24 can be easily bent (can be bent) as compared with the shoulder part 23 when contacting the lower surface 11 </ b> B of the main body part 11.

  With such a configuration, when the wiper blade 1 is used (wiping operation), the blade rubber portion 3 is moved on the surface to be wiped, and the wiping portion 12 is inclined with respect to the main body portion 11 as shown in FIG. First, the extension part 24 of the wiping part 12 contacts the lower surface 11 </ b> B of the main body part 11. In this case, since the extension portion 24 is located at a position protruding to the left and right in the wiping portion 12 (outside the shoulder portion 23), the pressing force pressing the wiper blade 1 against the surface to be wiped is small, and the inclination of the wiping portion 12 is small. Even in this case, the main body 11 properly contacts the lower surface 11B. Further, the extension portion 24 has a small thickness, is easily bent, and is appropriately bent even by a small pressing force, so that the tilting of the wiping portion 12 is not hindered. Therefore, the extension part 24 can bend further as the pressing force increases, and the inclination angle of the wiping part 12 increases appropriately.

  As described above, when the inclination angle of the wiping portion 12 increases as the pressing force increases, the shoulder portion 23 of the wiping portion 12 comes into contact with the lower surface 11B of the main body portion 11 as shown in FIG. . In this case, since the shoulder portion 23 is thicker in the vertical direction than the extension portion 24 and is difficult to bend, the wiping portion 12 is appropriately supported by the main body portion 11 and an excessive inclination of the wiping portion 12 is appropriate. To be prevented.

  As described above, according to the wiper blade 1 of the present embodiment, since the extension portion 24 extends outward from the shoulder portion 23 of the wiping portion 12, the pressing force is small and the wiping portion 12 has an inclination angle. Even when the wiping portion 12 is small, the extended portion 24 of the wiping portion 12 is surely in contact with the lower surface 11B of the main body portion 11. Therefore, even when the pressing force is small, chatter (undesired vibration) can be prevented from occurring in the blade rubber portion 3.

  Moreover, since the extension part 24 bends easily when the fall angle of the wiping part 12 is small, the inclination of the wiping part 12 can be increased appropriately. On the other hand, when the pressing force increases and the tilt angle of the wiping portion increases, the shoulder portion 23 having higher rigidity than the extension portion 24 comes into contact with the main body portion 11, so the tilt angle of the wiping portion 12 is It is stable and can effectively prevent the wiping portion 12 from falling too much.

  FIG. 8 shows a part of the wiper blade (shoulder 23 and extension 30) in the second embodiment of the present invention. The present embodiment is different from the first embodiment only in that the step portion 31 is formed on the lower surface side of the shoulder portion 23 and the extension portion 30. Also with such a configuration, the thickness of the extension 30 can be reduced by the level difference of the stepped portion 31, and the extension 30 can be configured to be easily bent. Therefore, the same effects as those of the first embodiment can be obtained.

FIG. 9 shows a part of a wiper blade in a reference example of the present invention. As shown in the drawing, in this reference example , a step portion 36 and a step portion 37 are provided on both the upper surface side and the lower surface side of the shoulder portion 23 and the extension portion 35. Even with such a configuration, the same effects as those of the first and second embodiments can be obtained.

FIG. 10 shows a part of a wiper blade in another reference example of the present invention. As shown, Oite to this reference example, the upper end face 21 of the wiping unit 12 is provided with notches 41 located at the proximal end of the extension portion 40 (between the shoulder portion 23). Thereby, since the extension part 40 can be easily bent with respect to the shoulder part 23 in the part in which the notch part 41 is provided, the same effect as each said embodiment is acquired. Further, by changing the depth of the cutout portion 41, the ease of bending of the wiping portion 12 can be easily adjusted.

FIG. 11 shows a part of a wiper blade in still another reference example of the present invention. As shown in the drawing, in this reference example , a notch portion 46 and a notch portion 47 are provided on the upper side and the lower side of the shoulder portion 23 and the extension portion 45 so as to be located at the base end of the extension portion 45. ing. Even with such a configuration, the same effects as those of the above-described embodiments can be obtained. Of course, such a notch can be provided only below the shoulder 23 and the extension.

FIG. 12 shows a part of a wiper blade in still another reference example of the present invention. As shown in the drawing, in this reference example , a cavity 51 is provided on the inner side of the extension 50 over the entire length in the longitudinal direction. In addition, the form of the cavity 51 is not particularly limited, and may be continuous with the entire length in the longitudinal direction as in the present embodiment, or may be provided with a plurality at intervals in the longitudinal direction, for example. Even with such a configuration, the extension portion 50 having the cavity portion 51 on the inner side is easily bent, so that the same effects as those of the above embodiments can be obtained without providing a step or a notch on the outer surface of the wiping portion 12. Can do. Moreover, the easiness of bending of the extension part 50 can be adjusted appropriately by changing the size and shape of the hollow part.

FIG. 13 shows a part of a wiper blade of still another reference example of the present invention. In the present reference example , the extension portion 55 is formed of a different material having a greater flexibility than the material constituting the shoulder portion 23. Even with such a configuration, the extension portion 55 can be easily bent. Therefore, the same effects as those of the above-described embodiments can be obtained without providing a step or a notch on the outer surface of the wiping portion 12. In addition, the easiness of bending of the extension portion 55 can be appropriately adjusted by changing the material constituting the extension portion 55.

DESCRIPTION OF SYMBOLS 1 Wiper blade 2 Support part 3 Blade rubber part 4 End cap 5 Wing 11 Blade rubber part main part 12 Blade rubber part wiping part 13 Blade rubber part connection part 21 Wiping part upper end surface 22 Wiping part lower end part 23 Shoulder Part 24 extension part 25 step part 30 extension part 31 step part 35 extension part 36 step part 37 step part 40 extension part 41 notch part 45 extension part 46 notch part 47 notch part 50 extension part 51 cavity part 55 extension part

Claims (3)

A support part and a wiping member supported by the support part;
The wiping member includes a main body portion held by the support portion, a wiping portion for wiping the surface to be wiped, and a connecting portion for connecting the main body portion and the wiping portion.
The wiping portion can be inclined with respect to the main body portion by bending the connecting portion,
At the end of the wiping part on the main body part side, a shoulder that extends laterally from the connection part is provided,
In the wiper blade, the shoulder portion is adapted to come into contact with the main body when the wiping portion is inclined with respect to the main body.
On the outside of the shoulder portion, when the wiping portion is inclined with respect to the main body portion, provided with an extension portion that comes into contact with the main body portion before the shoulder portion,
The extension part is formed to bend more easily than the shoulder part when contacting the main body part ,
A wiper blade provided with a step portion between the shoulder portion and the extension portion, wherein the extension portion is thinner than the shoulder portion by a step amount of the step portion . The wiper blade according to claim 1 , wherein the extension portion has a hollow portion therein. The wiper blade according to claim 1 or 2 , wherein the extension portion is formed of a material that is more flexible than the shoulder portion.

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