JP2007055589A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper device capable of reducing the height of the wiper device from a surface to be wiped off. <P>SOLUTION: The wiper device (1), comprising a clip base (5) detachably fitted to a wiper arm (3) and lever parts (6) rotatably supported on the clip base (5) and positioned along the extending direction of a blade rubber (2). Blade rubber holding parts (7a), (7b), and (7c) holding the blade rubber (2) are fitted to both of the clip base (5) and the lever part (6). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper device used for wiping a surface to be wiped such as a window of a vehicle.

  Conventionally, as this type of wiper device, a primary lever that is detachably attached to the tip of a wiper arm that is biased toward the surface to be wiped, a secondary lever that is rotatably supported at both longitudinal ends of the primary lever, There is known a configuration in which a blade rubber is held by a holding portion provided on the yoke, and a yoke rotatably supported at both longitudinal ends of the secondary lever (for example, Patent Document 1).

According to such a configuration, it is possible to set a large number of holding portions while equalizing the pressing force of the blade rubber in each holding portion.
Japanese Utility Model Publication No. 7-015465

  However, in the conventional wiper device, since the yoke, the secondary lever, and the primary lever are stacked on the surface to be wiped, the height of the wiper device from the surface to be wiped is particularly high at the center in the longitudinal direction. To some extent, the air resistance during driving increased, and it was in the way of visibility. For this reason, it has been desired to further reduce the height of the wiper device from the surface to be wiped.

  Then, an object of this invention is to obtain the wiper apparatus which can make the height from the wiping object surface lower.

  According to the first aspect of the present invention, there is provided a wiper device that is attached to a wiper arm and holds a blade rubber, a clip base that is detachably attached to the wiper arm, and a blade rubber that is rotatably supported by the clip base. And a lever portion along the extending direction, and a blade rubber holding portion for holding the blade rubber is provided on both the clip base and the lever portion.

  The invention according to claim 2 is characterized in that a biasing means is provided for biasing the lever portion toward the surface to be wiped by the blade rubber with respect to the clip base.

  The invention of claim 3 is characterized in that a plate spring extending along the extending direction of the blade rubber is provided as the biasing means.

  The invention of claim 4 is characterized in that a coil spring is provided as another urging means.

  In the invention of claim 5, the lever portion has a primary lever rotatably supported by the clip base and a secondary lever rotatably supported by the primary lever, and the primary The lever is provided so as to extend to the end side in the extending direction of the blade rubber so as to cover the secondary lever.

  In the invention of claim 6, the lever portion is rotatably supported by the clip base, and is pivotally supported by the primary lever and is at least an end in the blade rubber extending direction from the primary lever. A secondary lever that extends to the part side, and a cover that covers the primary lever is attached to the primary lever so as to cover the primary lever and extend to the blade rubber extending direction end side. .

  According to invention of Claim 1, it can comprise so that the said clip base and the said lever part may not pile up on the wiping object surface, and the height of a wiper apparatus can be made lower by that much.

  According to the invention of claim 2, by setting the urging force by the urging means, it becomes easier to set the pressing force of the blade rubber in the blade rubber holding portion provided in the lever portion more appropriately.

  According to invention of Claim 3, it can suppress that the height of a wiper apparatus increases by providing a biasing means by using the leaf | plate spring extended along a blade rubber extending | stretching direction.

  According to the invention of claim 4, by providing the coil spring together with the leaf spring, there is an advantage that the degree of freedom of setting the urging force increases. Further, since the coil spring can be made smaller by providing the leaf spring, it is possible to suppress an increase in the height of the wiper device by providing the coil spring.

  According to the fifth aspect of the invention, the primary lever can hide the configuration of the lever portion such as the boundary portion between the primary lever and the secondary lever, thereby improving aesthetics and aerodynamic characteristics.

  According to the sixth aspect of the present invention, the cover can hide the configuration of the lever portion such as the boundary portion between the primary lever and the secondary lever, thereby improving the aesthetics and aerodynamic characteristics.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First Embodiment FIG. 1 is a side view showing the appearance of a wiper device according to this embodiment, FIG. 2 is a plan view showing the appearance of the wiper device, and FIG. 3 is a side view of a clip base of the wiper device. FIG. 4 is a side view (partially sectional view) of one of the two lever portions of the wiper device. In the following description, for the sake of convenience, in the normal direction of the surface to be wiped, the direction away from the surface to be wiped is defined as the upper direction (upper side), and the opposite direction is defined as the lower direction (lower side). In the figure, the X direction indicates the urging direction by the wiper arm, and the Y direction indicates the blade rubber extending direction.

  A wiper device 1 according to the present embodiment is an elongated holder that holds a linear blade rubber 2, and is attached to and detached from the tip of a wiper arm 3 that is rotatably supported by a vehicle body (not shown) of a vehicle such as an automobile. Installed as possible. The wiper arm 3 is urged by an urging means (not shown) such as a coil spring (the urging direction: the X direction in FIG. 1), and the pointed edge 2 a side of the blade rubber 2 is wiped through the wiper device 1. 4 is pressed with an appropriate pressing force. Further, the wiper arm 3 is swung around a rotation axis substantially orthogonal to the wiping target surface 4 by a motor (not shown) provided on the vehicle body side. In such a configuration, when the motor is controlled to swing, the wiping target surface 4 is repeatedly slid along the arc-shaped track while the blade rubber 2 is pressed with an appropriate pressing force, and the wiping target surface 4 is wiped. It has become.

  The wiper device 1 includes a clip base 5 that is detachably attached to a distal end portion of a wiper arm 3 (FIG. 3), and two lever portions (lever assemblies) 6 and 6 that are rotatably supported by the clip base 5. ing. In the present embodiment, the two lever portions 6 and 6 have a symmetrical shape (same shape or different shape), but they may be differently configured.

  As shown in FIG. 3, the clip base 5 includes an elongated main body portion 5a, a clip portion 5c that is rotatably supported by a shaft 5b provided at a central portion in the longitudinal direction of the main body portion 5a, and a bottom of the main body portion 5a. A substantially strip-shaped bracket 5f that extends along the wall 5d and is fixed to the bottom wall 5d with rivets 5e, 5e is provided.

  The main body 5a is a metal member having a substantially U-shaped cross section that is open on the upper side (opposite to the surface to be wiped 4), and has a pair of parallel erected on the strip-shaped bottom wall 5d and both edges in the width direction. Side walls 5g, 5g. The shaft 5b is installed between the side walls 5g and 5g.

  For example, as shown in FIG. 3, the clip portion 5 c has a substantially U-shaped lever 5 h that expands and contracts elastically, and this lever 5 h is formed in a U-shape formed at the tip of the wiper arm 3. The hook can be engaged by being inserted into the hook portion 3a. When detaching, the engagement with the hook portion 3a is released by pinching the lever 5h to narrow the angle. The clip portion 5c can be screwed to the wiper arm 3 or attached using a connector or the like, or may be configured to be detachable from the shaft 5b.

  Both end portions in the longitudinal direction of the bracket 5f protrude to the side away from the bottom wall 5d, and holding portions (blade rubber holding portions) 7a and 7a for holding the base portion 2b of the blade rubber 2 from above are projected to the protruding portions. Is formed.

  The lever portion 6 includes a primary lever 8 that is rotatably supported by the clip base 5, a secondary lever 9 that is rotatably supported by the primary lever 8, and a yoke 10 that is rotatably supported by the secondary lever 9. And.

  In the present embodiment, one end of the primary lever 8 in the longitudinal direction (the extending direction of the blade rubber 2; the left and right direction in FIGS. 1 and 2; the Y direction) is the longitudinal direction of the clip base 5 (the extending direction of the blade rubber 2). The primary lever 8 extends from one end in the longitudinal direction of the clip base 5 to the outside in the longitudinal direction (on the end in the extending direction of the blade rubber 2). The primary lever 8 is pivotally supported by a shaft 5i installed between end portions of the side walls 5g and 5g of the clip base 5.

  The primary lever 8 is a metal member having a substantially U-shaped cross section opened to the lower side (wiping target surface 4 side), and has a strip-shaped top wall 8a and a pair of parallel erected on both edges in the width direction. Side walls 8b and 8b are provided.

  Further, the shaft 8c is disposed between the side walls 8b and 8b on the blade lever extending direction end side of the primary lever 8 (the extending direction end side of the blade rubber 2 from the shaft 5b on which the primary lever 8 is supported; right side in FIG. 4). Is constructed, and a substantially central portion in the longitudinal direction of the secondary lever 9 is pivotally supported on the shaft 8c.

  The primary lever 8 is biased toward the wiping target surface 4 by the biasing means 11 with respect to the clip base 5. In this embodiment, a plate spring 12 and a coil spring 13 are provided as the biasing means 11.

  One end of the leaf spring 12 is fixed to the longitudinal end of the bottom wall 5d of the clip base 5 by a rivet 5j, while the other end is substantially the center in the longitudinal direction of the top wall 8a of the primary lever 8 and the primary lever 8. It is interposed in the gap between the pins 8d provided in the part. In this case, the leaf spring 12 is configured to be mounted in a state in which the other end portion (the end portion on the pin 8d side) of the leaf spring 12 is elastically lifted upward from the free state. An urging force from the other end to the wiping target surface 4 side acts on the pin 8d in an attempt to elastically restore the free state.

  The coil spring 13 is configured as a torsion spring wound around the outer periphery of the shaft 5i, and the other end of the winding is in contact with the bottom wall 5d of the clip base 5, while the other end is The upper end of the top wall 8a of the primary lever 8 is locked to the upper surface side at a position closer to the blade rubber extending direction end than the shaft 5i. In this case, the coil spring 13 is configured so that the other end (the end on the primary lever 8 side) of the winding of the coil spring 13 is elastically lifted upward from the free state. Tries to elastically restore from the mounted state to the free state, and a biasing force toward the wiping target surface 4 acts on the top wall 8a from the other end.

  The secondary lever 9 extends to the end side in the blade rubber extending direction (right side in FIG. 4) from the primary lever 8, and holds the base portion 2b of the blade rubber 2 from above at the end. A portion (blade rubber holding portion) 7b is formed.

  The secondary lever 9 also extends toward the center in the blade rubber extending direction with respect to the shaft 8c serving as a rotation support point in a state of being accommodated in a recess having a substantially U-shaped cross section of the primary lever 8. The substantially central portion in the longitudinal direction of the yoke 10 is pivotally supported by a shaft 9a provided at the end portion on the center side.

  Then, holding portions (blade rubber holding portions) 7c and 7c for holding the base portion 2b of the blade rubber 2 from above are formed at both ends in the longitudinal direction of the yoke 10.

  Note that both the secondary lever 9 and the yoke 10 are formed of a substantially U-shaped metal member opened to the lower side (wiping target surface 4 side). Further, the shafts 5b, 5i, 8c, 9a and the like can be constituted by rivets, for example.

  In the embodiment described above, the blade rubber 2 includes the holding portions 7a (two in total) of the clip base 5, the holding portions 7b (two in total) of the two secondary levers 9, and the holding portions 7c (two in total) of the two yokes 10. A total of eight places (four places) are held by the wiper device 1, and the pressing force from the holding portions 7 a, 7 b, 7 c to the wiping target surface 4 acts. In the configuration of the present embodiment, the installation position of each holding portion 7a, 7b, 7c and the magnitude of the urging force of the urging means 11 (the leaf spring 12 and the coil spring 13) are appropriately set with respect to the urging force of the wiper arm 3. By setting to, it becomes possible to equalize the pressing force from each holding portion 7a, 7b, 7c.

  In this embodiment, as shown in FIG. 4, a cover 14 made of synthetic resin or the like is attached to the primary lever 8, and the cover 14 covers the entire lever portion 6 including the primary lever 8 and the secondary lever 9. ing. Since the cover 14 can cover the configuration of the lever portion 6, the aesthetic appearance can be improved. Further, the aerodynamic characteristics can be improved by adjusting the outer shape of the cover 14. For example, it is possible to reduce the resistance of the wiping operation by reducing the air resistance, to generate a down force (aerodynamic force) that presses the blade rubber 2 toward the wiping target surface 4 side, or to suppress wind noise.

  According to the above embodiment, the holding portion 7a of the blade rubber 2 is provided on the clip base 5 located in the longitudinal center of the wiper device 1, and from the clip base 5 toward the end in the blade rubber extending direction. Since the extended lever portion 6 is also provided with holding portions 7b and 7c so that the clip base 5 and the lever portion 6 are not stacked at the center in the longitudinal direction, the height of the wiper device 1 is further reduced. can do.

  Further, according to the present embodiment, the biasing means 11 for biasing the lever portion 6 toward the surface 4 to be wiped by the blade rubber 2 with respect to the clip base 5 is provided, so the biasing force of the biasing means 11 is set. Thus, the pressing force of the blade rubber 2 at the holding portions 7b and 7c provided on the lever portion 6 can be set more appropriately.

  Moreover, according to this embodiment, since the leaf spring 12 extending along the blade rubber extending direction is provided as the biasing means 11, the height of the wiper device 1 is increased by providing the biasing means 11. Can be suppressed.

  Further, according to the present embodiment, since the coil spring 13 is provided as the urging means 11 in addition to the plate spring 12, the magnitude of the urging force and the holding portions 7b and 7c of the lever portion 6 by the two urging means 11 are provided. The degree of freedom of setting the pressing force can be increased, and the coil spring 13 can be made smaller, so that the height of the wiper device 1 is suppressed by providing the coil spring 13. can do.

  Further, according to the present embodiment, the cover 14 can hide the configuration of the lever portion 6 such as the boundary portion between the primary lever 8 and the secondary lever 9, and the aesthetic appearance can be improved. The aerodynamic characteristics can be improved relatively easily by adjusting the outer shape of the cover 14 such as by providing fins.

  (Second Embodiment) FIG. 5 is a perspective view (partially cutaway view) of a part of a wiper device according to this embodiment, and FIG. 6 is a side view (partially sectional view) of a part of the wiper device. 7 is a plan view of a part of the wiper device, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. The wiper device 1A according to the present embodiment includes the same components as the wiper device 1 according to the first embodiment. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.

  First, the wiper device 1A according to the present embodiment is different from the first embodiment in that the lever portion 6A is formed of a synthetic resin. That is, by forming the primary lever 8A, the secondary lever 9A, and the yoke 10A having a substantially inverted U-shaped cross section from synthetic resin, the weight of the lever portion 6A and thus the wiper device 1A can be reduced. Note that the clip base 5A may be formed of a synthetic resin.

  Further, in the present embodiment, the primary lever 8A extends from the rotation support point of the secondary lever 9A to the end side in the blade rubber extending direction, and further, the secondary lever 9A is placed in a recess having an inverted U-shaped cross section of the primary lever 8A. Also, the yoke 10A is accommodated and formed so as to cover them, which is different from the first embodiment.

  With this configuration, the primary lever 8A can hide the configuration of the lever portion 6A such as the boundary portion between the primary lever 8A and the secondary lever 9A, and the aesthetic appearance can be improved. Further, as compared with the case where a separate cover is provided, there is an advantage that the manufacturing cost can be further reduced since the number of parts can be reduced.

  Further, as shown in FIG. 8 and FIG. 9, in this embodiment, the air resistance is reduced by forming fins 8h along the longitudinal direction in the lower portion of the side wall of the primary lever 8A (the portion on the wiping target surface 4 side). ing. Further, by adjusting the outer shape of the primary lever 8A, it is possible to obtain a down force (pneumatic force) that presses the blade rubber 2 toward the wiping target surface 4 side, and it is also possible to suppress wind noise.

  In addition, with the resin portion of the lever portion 6A, the rotation support between the levers can be realized by a configuration different from that of the first embodiment. For example, regarding the configuration of the portion that rotatably supports the secondary lever 9A by the primary lever 8A, as shown in FIGS. 5 to 8, the secondary lever 9A protrudes in a direction opposite to the inner wall surfaces of the side walls 9b and 9b. The cylindrical projections 9c and 9c are provided, and the plate-like projection 8e of the primary lever 8A is inserted into the slit 9d formed between the projections 9c and 9c, and the projection 9c is inserted into the recesses 8f and 8f formed in the projection 8e. , 9c, the primary lever 8A is rotated relative to the secondary lever 9A. Note that an opening 9f for inserting the protrusion 8e is formed in the top wall 9e of the secondary lever 9A.

  In the present embodiment, the holding portions 7a and 7a of the clip base 5A are provided directly on the bottom wall 5d of the clip base 5A, thereby reducing the number of parts compared to the first embodiment. In addition, the biasing means 11 is a coil spring 13, and the number of parts is also reduced in this respect.

  Of course, the same effects as those of the first embodiment can also be obtained by the present embodiment.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above-described embodiment, the case where the lever portion is configured by a primary lever, a secondary lever, and a yoke is illustrated, but the present invention is not limited to such a configuration. In addition, the lever for installing the holding portion of the blade rubber or the installation position thereof can be changed as appropriate.

1 is a side view showing an external appearance of a wiper device according to a first embodiment of the present invention. 1 is a plan view showing an appearance of a wiper device according to a first embodiment of the present invention. The side view (partial sectional view) of the clip base of the wiper device according to the first embodiment of the present invention. The side view (partial sectional view) of one of the two lever portions of the wiper device according to the first embodiment of the present invention. The perspective view of a part of wiper device concerning a 2nd embodiment of the present invention (partially broken view). The side view (partial sectional view) of one of the two lever portions of the wiper device according to the second embodiment of the present invention. The top view of one of the two lever parts of the wiper device concerning a 2nd embodiment of the present invention. VIII-VIII sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Wiper apparatus 2 Blade rubber 3 Wiper arm 4 Wiping object surface 5, 5A Clip base 6, 6A Lever part 7a, 7b, 7c Blade rubber holding part 8, 8A Primary lever 9, 9A Secondary lever 11 Energizing means 12 Leaf spring 13 Coil spring 14 Cover X Energizing direction Y Blade rubber extending direction

Claims (6)

A wiper device that is attached to a wiper arm and holds a blade rubber,
A clip base detachably attached to the wiper arm;
A lever portion that is rotatably supported by the clip base and extends along the extending direction of the blade rubber;
With
A wiper device characterized in that a blade rubber holding portion for holding a blade rubber is provided on both the clip base and the lever portion.   2. The wiper device according to claim 1, further comprising an urging unit that urges the lever portion toward a surface to be wiped by a blade rubber with respect to the clip base.   The wiper device according to claim 2, wherein a leaf spring extending along the extending direction of the blade rubber is provided as the biasing means.   The wiper device according to claim 3, wherein a coil spring is provided as another urging means. The lever portion includes a primary lever that is rotatably supported by the clip base, and a secondary lever that is rotatably supported by the primary lever.
The wiper device according to any one of claims 1 to 4, wherein the primary lever is provided so as to extend to an end portion side of the blade rubber in the extending direction so as to cover the secondary lever. The lever portion is rotatably supported by the clip base, a secondary lever that is rotatably supported by the primary lever and extends at least toward the blade rubber extending direction end from the primary lever, Have
5. The cover according to claim 1, wherein a cover that covers the primary lever and covers the secondary lever by extending toward a blade rubber extending direction end is attached to the primary lever. Wiper device.

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