WO2004054860A1

WO2004054860A1 - Wiper blade

Info

Publication number: WO2004054860A1
Application number: PCT/JP2003/016119
Authority: WO
Inventors: Takashi Hoshino
Original assignee: Mitsuba Corporation
Priority date: 2002-12-17
Filing date: 2003-12-16
Publication date: 2004-07-01
Also published as: JPWO2004054860A1

Abstract

A driver’s side wiper blade (18a) has a driver’s side rubber holder with two bar-like spring members (24). Two vertebrae (31) are installed in a blade rubber (21a) supported by the driver’s side rubber holder. A front passenger’s side wiper blade (18b) has a front passenger’s side rubber holder with two bar-like spring members (24). A blade rubber (21b) supported by the front passenger’s side rubber holder has two vertebrae (41). The vertebrae (41) are formed with a curvature smaller than that of the vertebrae (31), and this results that the front passenger’s side wiper blade (18b) has a smaller curvature than the driver’s side wiper blade (18a).

Description

Wiper blade Technical field

The present invention relates to a wiper blade for wiping a windshield of a vehicle. Background art

Light

Vehicles such as automobiles are equipped with a wiper device to wipe off extraneous matter, such as rain, snow, insects, and splashes from the vehicle ahead, that adheres to the windshield to secure the driver's view. Such a wiper device generally includes a wiper arm that is swung by an electric motor and a wiper blade that is attached to a tip end of the wiper arm. The pressing force is applied. When the wiper arm moves, the wiper blade reciprocates on the glass surface to perform the wiping operation. In order to exhibit good wiping performance, it is necessary to disperse the pressing force applied to the wiper blade from the wiper arm in the longitudinal direction of the blade wrapper that directly contacts the glass. Therefore, a so-called tournament-type wiper blade has been developed in which a plurality of levers are provided between the blade wrapper and the wiper arm, and the pressing force is dispersed through the lever. However, in the tournament type wiper blade, there were problems that the number of parts was reduced due to the configuration of the lever, and the number of levers was limited, so that the pressing force could not be sufficiently distributed. Therefore, in a conventional wiper blade, as shown in, for example, Japanese Patent Application Laid-Open No. 6-34049, a leaf spring member such as a party blade is attached to a wiper arm, and a blade wrapper is directly attached to this leaf spring member. The pressing force applied from the wiper arm is dispersed by the leaf spring member over the entire blade wrapper. Further, the width and thickness of the leaf spring member are changed in the longitudinal direction, so that a distribution pressure according to the surface of the window glass to be wiped is applied to the blade rubber.

Depending on the vehicle type, the window glass installed on the vehicle The curvature is often different. On the other hand, in a conventional wiper blade, the distribution pressure of the blade wrapper with respect to the window glass is determined by the characteristics of the leaf spring member.Therefore, the wiper blade using the leaf spring member having a predetermined characteristic has a specific curvature. An effective distribution pressure is generated only for the window glass. For this reason, it is necessary to set a wiper blade using a dedicated leaf spring member for each vehicle type, which reduces the versatility of the wiper blade.

An object of the present invention is to improve the versatility of a wiper blade for window glasses having different curvatures. Disclosure of the invention

The wiper blade according to the present invention is a wiper blade mounted on a wiper arm that is swingably provided on a vehicle, and swings on a wind glass to wipe the wind glass, the wiper blade being in contact with the wind glass. A first spring member provided on a wrapper holder supporting the blade wrapper, for applying the pressing force of the wiper arm to the blade wrapper in a distributed manner; and a spring force of the first spring member mounted on the blade wrapper. And a second spring member for compensating for this.

The wiper blade according to the present invention is characterized in that the plurality of first spring members each formed in a rod shape are provided on the blade holder so as to be shifted from each other in the wiping direction, and a plurality of holding pieces for holding the blade wrapper are provided in the first spring. It is characterized by being fixedly arranged at predetermined intervals on the member.

The wiper blade of the present invention is characterized in that the second spring member is a flat spring member mounted on the blade wrapper.

According to the present invention, by changing the characteristics of the second spring member mounted on the blade wrapper, the wiper blade can be adapted to window glasses having various curvatures. Can be improved. Further, according to the present invention, since the distribution pressure of the blade wrapper can be corrected by changing the characteristics of the second spring member mounted on the blade wrapper, the wiping performance of the wiper blade can be easily controlled. Can be. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an explanatory view schematically showing a wiper device having a wiper blade according to an embodiment of the present invention.

Fig. 2 (a) is a partially cutaway front view showing the details of the wiper blade on the DR side shown in Fig. 1, and Fig. 2 (b) is a partial view showing the details of the wiper blade on the AS side shown in Fig. 1. It is a notch front view.

FIG. 3 (a) is a top view showing the wrapper holder on the DR side shown in FIG. 2 (a), and FIG. 3 (b) is a top view showing the wrapper holder on the AS side shown in FIG. 2 (b).

FIG. 4 is a cross-sectional view taken along the line A_A in FIG.

FIG. 5 is a perspective view showing details of the wrapper holder shown in FIG.

FIGS. 6 (a) and 6 (b) are cross-sectional views each showing a modification of the wiper blade on the DR side shown in FIG. 2 (a).

Fig. 7 (a) is a cross-sectional view showing the normal condition of the studs attached to the DR-side wrapper holder, and Fig. 7 (b) is the DR-side wrapper holder when an excessive bending force is applied in the reverse direction. FIG. 7 (c) is a cross-sectional view showing the state of the DR-side wrapper holder when an excessive bending force is applied in the forward direction.

Fig. 8 (a) is an explanatory diagram showing the combination of the rod-shaped spring member and the party bra in the wiper blade on the DR side. It is explanatory drawing which shows a combination. BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 1, a vehicle 11 is provided with a wiper device 13 for wiping rain attached to a windshield, that is, a windshield 12, splashing from a preceding vehicle, etc., and securing a driver's view.

The wiper device 13 is fixed to a wiper shaft 14 a rotatably supported by the vehicle 11 and is provided on the vehicle 11 so as to be swingable. The wiper arm 15 b on the passenger seat side, that is, the AS side, which is fixed to the wiper shaft 14 b rotatably supported on the have. These wiper shafts 14a, 14b are connected to a wiper motor 17 via a link mechanism 16, and when the wiper motor 17 operates, these wiper arms 15a, 15b swing within a predetermined angle range.

The driver's seat side, that is, the DR side wiper blade 18a is mounted at the tip of the wiper arm 15a on the DR side, and the wiper arm 18b on the AS side is attached to the tip end of the wiper arm 15b on the passenger side, that is, the wiper blade 18 on the AS side. b is attached. A spring member such as a spring (not shown) is provided in each of the wipers 15a and 15b, and the respective wiper blades 18a and 18b receive a pressing force from the wiper arms 15a and 15b and receive a front force. It comes into resilient contact with the glass 12. When the wiper arms 15a, 15b swing, the wiper blades 18a, 18b move the wiping range 12a, 12b between the upper turning position and the lower turning position located at the lower end of the windshield 12. Swings on the windshield 12 at, and wipes the front glass 12.

Fig. 2 (a) is a partially cutaway front view showing the details of the wiper blade on the DR side shown in Fig. 1, and Fig. 2 (b) is a partially cutaway view showing the details of the wiper blade on the AS side shown in Fig. 1. It is a chipped front view. Fig. 3 (a) is a top view showing the DR side rubber holder shown in Fig. 2 (a), and Fig. 3 (b) is a top view showing the AS side wrapper holder shown in Fig. 2 (b). . Further, FIG. 4 is a sectional view taken along line AA in FIG. 2 (a), and FIG. 5 is a perspective view showing details of the wrapper holder shown in FIG. 3 (a). As shown in FIG. 2 (a), the wiper blade 18a on the DR side has a blade wrapper 21a that directly contacts the windshield 12 and a driver side, that is, a wrapper holder 22a on the DR side that supports the blade wrapper 21a. In a state away from the windshield 12, that is, in a natural state, it is curved with a radius of curvature smaller than the radius of curvature of the windshield 12. Similarly, as shown in FIG. 2 (b), the wiper blade 18b on the AS side has a blade wrapper 21b that directly contacts the windshield 12, and a passenger seat side supporting the blade wrapper 21b, that is, a wrapper holder 22 on the AS side. b, and are curved with a radius of curvature smaller than the radius of curvature of the windshield 12 in a state away from the windshield 12, that is, in a natural state. The length L 2 of the wiper blade 18 b on the AS side is the length L of the wiper blade 18 a on the DR side. 1 and is more strongly curved than the wiper blade 18a on the DR side, particularly at the longitudinal end side.

The wiper blade 18a on the DR side and the wiper blade 18b on the AS side have basically the same structure except for the points described above, so the following describes the wiper blade 18a on the DR side first. I do.

As shown in FIG. 3 (a), a support block 23 is provided at a substantially central portion in the longitudinal direction of the DR side wrapper holder 22a, and the support block 23 is provided on the support block 23. Two rod-shaped spring members 24 as first spring members are fixed to be displaced from each other in the moving direction when the wiper blade 18a performs the wiping operation on the windshield 12, that is, in the wiping direction. Each of the rod-shaped spring members 24 is formed in a substantially circular cross section, and is formed in an arc shape whose axis is curved with a smaller radius of curvature than the windshield 12. These rod-shaped spring members 24 are fixed to the support block 23 at substantially the center in the longitudinal direction, and protrude from both sides of the support block 23 by a predetermined length.

On one side of the support block 23, a plurality of (for example, 12 in this embodiment) holding pieces 26, which are also called bridge member elements, are provided, and these holding pieces 26 are rod-shaped springs. The members 24 are fixed side by side at predetermined intervals. That is, the holding pieces 26 are connected at predetermined intervals by the rod-shaped spring members 24. Similarly, a plurality of (for example, 12 in the present embodiment) holding pieces 26 are provided on the other side of the support block 23, and these holding pieces 26 are rod-shaped springs. The members 24 are fixed side by side at predetermined intervals. That is, the holding pieces 26 are connected at a predetermined interval by the rod-shaped spring members 24.

As shown in FIG. 4, these holding pieces 26 have a cross section having a base end wall 26a and a pair of side walls 26b, 26c substantially perpendicular to the base end wall 26a. The rod-shaped spring member 24 is formed in a C-shape, and penetrates one of the side wall portions 26b or the other side wall portion 26c.

As shown by the broken line in FIG. 5, the rod-shaped spring member 24 is bent into a crank shape inside each of the side wall portions 26 b and 26 c. Fixed to 4. That is, the rod-shaped spring member 24 is It is connected and fixed to each other by a holding piece 26 as a material so that the relative position of each other is regulated, and it is elastically deformable in a direction perpendicular to the windshield 12 but is elastically deformable in the wiping direction. Is regulated.

In the present embodiment, the rod-shaped spring member 24 is provided with a crank-shaped portion for fixing the holding piece 26. However, the present invention is not limited to this. For example, a knurl or knurl May be provided.

With such a structure, the rubber holder 22 a on the DR side is elastically deformable in a direction perpendicular to the windshield 12 with the support block 23 as a fulcrum.

Further, holding claws 26 d as holding portions are formed on the side walls 26 b and 26 c of each holding piece 26, and the blade wrappers 21 a are formed by these holding claws 26 d. Is held by each holding piece 26.

The play wrapper 21 has a base portion 27 held by a holding piece 26 and an edge portion 28 for contacting and wiping the front glass 12, the shape of which is conventionally known as a tournament type. It has the same shape as the blade rubber used for the wiper blade. A holding groove 27 a is formed in the base 27, and by holding the holding claw 26 d of each holding piece 26 with the holding groove 27 a, the blade wrapper 21 a becomes the holding piece 2. 6 That is, it is held by the wrapper holder 2 2a on the DR side. The base part 27 and the edge part 28 are connected via a thin neck part 29, and the edge part 28 is tilted through the neck part 29 to contact the windshield 12. In this case, the contact angle is kept appropriate. As the material of the play rubber 21a, natural rubber / chloroprene rubber or the like is used, and a material in which natural rubber and chloroprene rubber are blended so as to combine the advantages of each material is also often used. Praedrano 21a is manufactured by extruding these materials, and has the same cross-sectional shape in the longitudinal direction.

Mounting grooves 27b are formed on both sides of the blade wrapper 21a above the holding grooves 27a, and the mounting grooves 27b are each formed as a flat spring member. Bra 31 is attached. These party plastics 31 are previously formed to be curved at a predetermined curvature, and the blade wrappers 21 a are bent by the spring force of the parti- bler 31. About the function of this party bra 3 1 Will be described later.

As described above, in the DR-side wiper blade 18 a, the play wrapper 2 la is supported by the holding claws 26 d formed on the holding member 26, which is a deformation regulating member fixed to the rod-shaped spring member 24. As a result, the play wrapper used for the conventionally known tournament type wiper blade can be used as it is, and its versatility can be improved. Since the blade wrapper 21a is detachably mounted on the holding piece 26, the blade wrapper 21a can be easily replaced. The support block 23 has a clip 32 attached to the wiper arm 15a on the DR side.The wiper blade 18a on the DR side supports the support block 23 on the wiper arm 15a on the DR side. In this state, it is attached to the wiper arm 15a on the DR side, and the pressing force from the wiper arm 15a on the DR side is applied to this support block 23. In the natural state, the blade wrapper 21a supported by the wrapper holder 22 on the DR side is curved by the elastic force of the rod-shaped spring member 24 together with the wrapper holder 22a on the DR side. When a touches the front glass 12 and the pressing force from the wiper arm 15 a on the DR side is applied to the support block 23, the wrapper holder 2 2 a on the DR side adjusts to the curvature of the windshield 12. The blade wrapper 2 1 a deforms and contacts the windshield 12. That is, the rod-shaped spring member 24 is elastically deformed by the pressing force from the wiper arm 15 a so that the wrapper holder 22 a on the DR side follows the curvature of the windshield 12. Then, the reaction force of the rod-shaped spring member 24 due to the elastic deformation is transmitted to the holding piece 26, and the DR side wrapper holder 2 2a generates a force for pressing the blade wrapper 21a against the windshield 12. Become. The blade wrapper 21a is provided with a parti- bler 31. When the pressing force of the wiper arm 15a is applied to the wrapper holder 22a on the DR side, a rod-shaped spring member 24 is attached to the blade wrapper 21a. In addition to the reaction force, the elastic force of the party bra 31 is applied. As a result, the reaction force of the rod-shaped spring member 24 that is discontinuously applied in the longitudinal direction of the blade wrapper 21 a is corrected by the elastic force of the party blade 31 that is continuously generated in the longitudinal direction, and the blade wrapper 2 1 The pressure distribution of a on the windshield 12 is made uniform in the longitudinal direction. As described above, the pressing force from the wiper arm 15a on the DR side is The wrapper 21a is dispersedly added to the blade wrapper 21a by the material 24 and the partyr 31 and comes into contact with the windshield 12 with a predetermined distribution pressure characteristic.

The wiper blade 18a on the DR side has fins 33 as fin members formed of, for example, hard rubber, and the fins 33 are attached to the respective holding pieces 26 to form the fins 33 on the DR side. The wrapper holder 2 covers the entirety of 2a.

Therefore, the cross-sectional shape of the wiper blade 18a on the DR side has excellent aerodynamic characteristics, and prevents the wiper blade 18a on the DR side from lifting up when the vehicle 11 is running at a high speed, for example. Can be improved. Further, since the wiper blade 18a on the DR side itself has a fin shape, the height of the wiper blade 18a on the DR side can be suppressed, and the field of view of the driver or the like can be improved.

At this time, a rod-shaped spring member 24 having a substantially circular cross section is used as a spring member for distributing the pressing force from the wiper arm 15a on the DR side to the blade wrapper 21a. Occupies a small area in the cross-sectional area of the wiper blade 18a on the DR side, and when the cross-sectional shape of the wiper blade 18a on the DR side is set in consideration of aerodynamic characteristics, the degree of freedom in design is reduced. There is no. Therefore, it is possible to set the holding pieces 26 and the fins 33 to shapes optimal for aerodynamic characteristics.

As described above, in the DR-side wiper blade 18a, the elastic member that applies the pressing force of the DR-side wiper arm 15a to the blade wrapper 21a in a distributed manner is the bar-shaped spring member 24. By reducing the area of the rod-shaped spring member 24 occupying the cross-sectional shape of the wiper blade 18a on the DR side, the degree of freedom in designing the cross-sectional shape of the wiper blade 18a on the DR side can be improved.

Further, as shown in the figure, the respective bar-shaped spring members 24 are arranged side by side with respect to the blade wrapper 21a in the wiping direction. That is, the rod-shaped spring members 24 are arranged side by side on one side and the other side of the blade wrapper 21a. Therefore, the height dimension of the DR side wiper blade 18a in the direction perpendicular to the windshield 12 can be reduced.

As described above, since the DR side wiper blade 18a can be formed to have a low height dimension perpendicular to the windshield 12, the DR side wiper blade 18a is formed. The visibility of the driver or the like in the vehicle 11 using the blade 18a can be improved.

In the present embodiment, two bar-shaped spring members 24 are provided. However, the present invention is not limited to this, and a plurality of bar-shaped spring members 24 may be provided, for example, three bars as shown in FIG.

Further, in the present embodiment, the rod-shaped spring members 24 are arranged side by side on the wiping direction side of the blade wrapper 21a. However, the present invention is not limited to this. For example, as shown in FIG. It may be provided above the opposite side of the windshield 12. In this case, the width of the wiper blade 18a on the DR side in the wiping direction can be reduced.

Furthermore, in the present embodiment, the rod-shaped spring members 24 are respectively disposed adjacent to one side and the other side of the blade rubber 21a, but the present invention is not limited to this. A plurality of rod-shaped spring members 24 may be provided side by side. Further, in the present embodiment, the wrapper holder 22a on the DR side is covered with the fins 33, but is not limited to this. For example, as shown in FIG. May be formed. In FIGS. 6 (a) and 6 (b), members corresponding to those described above are denoted by the same reference numerals.

Fig. 7 (a) is a cross-sectional view showing the normal condition of the stopper attached to the DR-side rubber holder, and Fig. 7 (b) shows the DR side when an excessive bending force is applied in the reverse direction. FIG. 7C is a cross-sectional view illustrating a state of the wrapper holder, and FIG. 7C is a cross-sectional view illustrating a state of the DR-side wrapper holder when an excessive bending force is applied in the forward direction.

As shown in FIG. 3 (a), the DR side wrapper holder 22a is provided with a stopper 34 as excessive deformation restricting means.

Each of the stoppers 34 has a plurality of deformation restricting blocks 35 disposed between adjacent holding pieces 26 and a connecting band 36 connecting the deformation restricting blocks 35 to each other. One is provided on each side and the other side.

As shown in FIG. 5, each holding piece 26 has a U-shape at each end. An engagement portion 37 is formed, and each deformation restricting block 35 is arranged between adjacent holding pieces 26 so as to be engaged with these engagement portions 37. Two grooves 38 are formed in the base wall 26a of each holding piece 26 in the direction connecting the engaging portions 37, and the connecting band 36 is formed with these grooves 3 respectively. 8 are located. Further, a through hole 39 is formed in each of the holding pieces 26 at a substantially central portion of the groove 38 so as to penetrate in a direction perpendicular to the groove 38, as shown in FIG. 7 (a). However, when the DR-side wiper blade 18 a is in contact with the windshield 12, that is, in a normal state, the connecting band portions 36 are slightly loosened in the through holes 39. I have.

Then, as shown in FIG. 7 (b), when an excessive bending force is applied to the DR side wrapper holder 2 2a in the reverse direction to open the windshield 12, the rod-shaped spring member 2 4 With the fulcrum as a fulcrum, the distance between the two engaging portions 37 is reduced, and the deformation restricting block 35 located between these engaging portions 37 is interposed between these engaging portions 37 and interferes with each other, thereby holding the adjacent holding members. It is regulated that the pieces 26 approach the predetermined interval or less. At this time, the rod-shaped spring member 24 is in a deformed state within the elastic deformation range, and does not reach the plastic deformation range. That is, the stopper 34 prevents the wrapper holder 22a on the DR side from being excessively bent by causing interference with the engaging portion 37 when the rod-shaped spring member 24 is in the elastic deformation region. As a result, even if an excessive bending force is applied to the DR-side wiper blade 18a in the opening direction, the deformation of the rod-shaped spring member 24 is limited to within the elastic range, and plastic deformation is prevented.

Conversely, as shown in FIG. 7 (c), when the DR side wrapper holder 2 2a is forwardly bent, that is, when excessive bending force is applied in the closing direction with respect to the windshield 12, the rod-shaped spring member 2 4 With the fulcrum as a fulcrum, the distance between the two engaging portions 37 is widened, and each deformation regulating block 35 moves together with each of the holding pieces 26 in a direction away from each other with the rod-shaped spring member 24 as a fulcrum. As a result, the looseness of each of the connecting strips 36 is reduced, and tension is generated in the connecting strips 36 so that the distance between the adjacent deformation restriction blocks 35 is further increased. At this time, the rod-shaped spring member 24 is in a deformed state within the elastic deformation region, and does not reach the plastic deformation region. That is, when the rod-shaped spring member 24 is in the elastic deformation range, the stopper 34 is used as the deformation regulating block 35, that is, each holding piece Restrict the spread of 26 to more than the specified distance, and restrict excessive bending of the DR side wrapper holder 22a. As a result, even if an excessive bending force is applied to the wiper blade 18a on the DR side in the closing direction, the deformation of the rod-shaped spring member 24 is limited to an elastic range, and plastic deformation is prevented.

As described above, in the DR-side wiper blade 18a, if an excessive bending force is applied, the stopper 34 restricts the excessive bending of the DR-side wrapper holder 22a. By preventing plastic deformation of the spring member 24, the durability of the wiper blade 18a on the DR side can be improved.

In the present embodiment, the plastic deformation of the rod-shaped spring member 24 is prevented by using the deformation restricting block 35 disposed between the adjacent holding pieces 26. However, the present invention is not limited to this. An interference part is formed on each of the adjacent holding pieces 26, and when an excessive bending force is applied to the wiper blade 18a on the DR side, the interference part of the adjacent holding pieces 26 directly interferes. Then, excessive bending may be restricted.

Further, in the present embodiment, the deformation restricting blocks 35 are connected to each other by the connecting band portion 36. However, the present invention is not limited to this. The excessive bending of one side of the side wrapper holder 22a may be restricted. In this case, a deformation restricting block 35 is provided on both sides of the bar-shaped spring member 24 on the side of the windshield 12 and on the opposite side of the windshield 12 so as to prevent deformation in both the opening direction and the closing direction. It may be regulated.

On the other hand, as shown in Fig. 2 (b) and Fig. 3 (b), the structure of the wiper blade 18b on the AS side is basically the same as that of the wiper blade 18a on the DR side. The usage and effects are the same as those of the aforementioned DR-side wiper blade 18a. Hereinafter, the difference between the AS side wiper blade 18 b and the DR side wiper blade 18 a will be described. In FIGS. 2 (b) and 3 (b), the same reference numerals are given to members corresponding to the above-described members.

The wrapper holder for the wiper blade 18b on the AS side, that is, the wrapper holder 2 2b on the AS side, is based on the wrapper holder formed with the same structure as the wrapper holder 22a on the DR side, and is located at both ends from the wrapper holder By removing the two holding pieces 26, the shape becomes shorter than the DR side wrapper holder 22a. Is done. In other words, similarly to the wrapper holder 2 2a on the DR side, 12 holding pieces 26 are respectively fixed on both sides of the support block 23 to the rod-shaped spring member 24 at a predetermined interval. The rod-shaped spring member 24 is cut between the holding piece 26 on the side and the holding piece 26 adjacent thereto, and the other holding piece 26 on the foremost side and the holding piece 26 adjacent thereto are cut off. By cutting the rod-shaped spring member 24 between the two, the AS-side wrapper holder 22b is formed to a predetermined length, that is, a dimension shorter by two holding pieces than the DR-side wrapper holder 22a. You do it. Therefore, when manufacturing the wiper blades 18a and 18b on the DR side and the AS side having different lengths, when manufacturing the wiper blade 18a on the DR side or the wiper blade 18b on the AS side It is not necessary to prepare two different types of rod-shaped spring members 24 and manufacture two types of wrapper holders having different lengths by using the rod-shaped spring members 24 having different lengths. In other words, if the wrapper holder 22a on the DR side is manufactured and stored, the wrapper holder 22b on the AS side can be easily manufactured based on this. At this time, since the bar-shaped spring member 24 is formed to have a circular cross section, it is easy to cut the flat spring member such as a party spring.

In the present embodiment, a case where the rubber holder formed to have a length corresponding to the wiper blade 18a on the DR side is formed short according to the length of the wiper blade 18b on the AS side is described. However, the present invention is not limited to this.For example, the wrapper holder 22a on the DR side used for the wiper blade 18a on the DR side may be cut by cutting the wrapper holder formed longer than the wrapper holder 22a on the DR side. For example, by cutting the rod-shaped spring member 24 between any two holding pieces 26 from a wrapper holder formed to a predetermined length, such as forming, and removing a predetermined number of holding pieces, many Different types of wrapper holders may be formed.

As described above, in the wiper blades 18a and 18b, the length of the wrapper holder can be changed only by cutting the rod-shaped spring member 24 between the two holding pieces 26. Different wiper blades can be easily manufactured. Fig. 8 (a) is an explanatory view showing the combination of a rod-shaped spring member and a party bra on the wiper blade on the DR side, and Fig. 8 (b) is a combination of a rod-shaped spring member and a party bra on the wiper blade on the AS side. FIG. As described above, the AS-side wiper blade 18b uses the AS-side wrapper holder 22 which has the same structure as the DR-side wrapper holder 22a but differs only in the length dimension. The wrap wrapper 21b used is shorter than the blade wrapper 21a used for the wiper blade 18a on the DR side according to the length of the wrapper holder 22b on the AS side. Further, the party blade 41 attached to the blade wrapper 21 b has a stronger curvature than the party blade 31 used for the wiper blade 18 a on the DR side. 18b is curved more strongly than the wiper blade 18a on the DR side.

As shown in FIG. 8A, the rod-shaped spring member 24 forming the wrapper holder 22a on the DR side is curved with a smaller radius of curvature than the windshield 12, and is used for the wiper blade 18a on the DR side. As the second spring member 31 mounted on the blade wrapper 21a, a member having a larger radius of curvature and a smaller degree of curvature than the rod-shaped spring member 24 is used. The party 31 is formed in a thin plate shape in a direction perpendicular to the front glass 12, and is elastically deformable in a direction perpendicular to the windshield 12. Therefore, when the wiper blade 18a on the DR side comes into contact with the windshield 12 and a pressing force is applied from the wiper arm 15a on the DR side, the spring force of the rod-shaped spring member 24 is corrected by the spring force of the party 31. Is done. In other words, when the pressing force from the wiper arm 15a on the DR side is applied, the combined spring force of the spring force of the rod-shaped spring member 24 and the spring force of the party 31 is applied to the blade wrapper 21a. The combined spring force sets the distribution pressure of the blade wrapper 21a on the windshield 12, and the blade wrapper 21a follows the windshield 12.

On the other hand, as shown in FIG. 8 (b), since the wrapper holder 22b on the AS side is formed based on the rubber holder 22a on the DR side, the rod-shaped spring member 24 as the first spring member is also provided. Like the wrapper holder 22a on the DR side, it is curved with a smaller radius of curvature than the windshield 12. On the other hand, the flat spring member or the party 41 as a second spring member attached to the blade wrapper 21 b used for the wiper blade 18 on the AS side is a member attached to the blade wrapper 21 a on the DR side. The one having a small radius of curvature is used for one tibra 31. Therefore, when the AS-side wiper blade 18b comes into contact with the windshield 12 and a pressing force is applied from the AS-side wiper arm 15b, the spring force of the rod-shaped spring member 24 is reduced to the DR-side wiper blade 18a. This is more strongly compensated by the spring force of this party 41, that is, the combined spring force of the bar-shaped spring member 24 and the spring force of the party 41 on the wiper blade 18b on the AS side is The wiper blade 18a is stronger than the wiper blade 18a, so that the wiper blade 18b on the AS side is more strongly curved than the wiper blade 18a on the DR side. When a holding force is applied from the AS-side hyperarm 15b, a distribution pressure of the blade wrapper 21b on the windshield 12 is set by the combined spring force. The wiper blade 18b on the AS side can follow the windshield 12 with a sufficient distribution pressure even in a tightly curved portion on the side of the windshield.

That is, in the wiper blades 18a and 18b, the party mounted on the blade rubbers 21a and 21b with respect to the DR-side wrapper holder 22a and the AS-side wrapper holder 22b using the same rod-shaped spring member 24. By changing the characteristics of the bras 31 and 41, the characteristics of these wiper blades 18a and 18b can be changed. Further, since the blade wrappers 2 la and 2 lb can be easily attached to and detached from the rubber holders 22 a and 22 b, it is easy to replace the party blades 31 and 41 with one having another characteristic. In the present embodiment, the case where the party 41 having different characteristics is used for the wiper blade 18b on the AS side with respect to the wiper blade 18a on the DR side is shown, but the present invention is not limited to this. For example, the particle bra 31 attached to the blade wrapper 21a on the DR side may be replaced with one having a different characteristic so that the wiper blade 18a on the DR side can correspond to a glass surface having various curvatures.

Thus, in the wiper blades 18a and 18b, by changing the characteristics of the party brassels 31 and 41 attached to the blade wrappers 2la and 21b, the wiper blades 18a and 18b can have various curvatures. The wiper blades 18a and 18b can be made more versatile because they can be used on glass surfaces. . Further, in the wiper blades 18a and 18b, the wiper blades 18a and 18b are formed based on wrapper holders 22a and 22b using rod-shaped spring members 24 having predetermined characteristics. Since the characteristics of 18b can be changed in various ways, there is no need to prepare various types of rod-shaped spring members having different characteristics.

In the wiper blades 18a and 18b, the elastic force of the bar-shaped spring member 24 and the party blades 31 and 41 changes due to aging and the like, and the blade wrappers 21a and 21b change. If the distribution pressure of b on the windshield 12 is not appropriate, the distribution pressure of the blade wrappers 21a and 21b, that is, the wiping performance, can be easily changed by changing the parties 31 and 41. Can be controlled.

Thus, in the wiper blades 18a and 18b, the blade wrappers 2 1 and 2 1b are replaced by the party wrappers 31 and 41 having different characteristics. Since the distribution pressures of a and 21b can be easily adjusted, the wiping performance of the wiper blades 18a and 18b can be easily controlled.

In the present embodiment, the party springs 31 and 41 are used as the flat spring members as the second spring member. However, the present invention is not limited to this, and a bar-shaped spring member or the like may be used. .

The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the scope of the invention. For example, in the above embodiment, the wrapper holder 2 on the DR side is made up of 24 holding pieces 26 made of a resin material.

Although 2a is formed, the holding piece is not limited to this, and the holding piece may be formed using metal or the like.The mounting portions of the arms 15a and 15b may also be formed as shown in the present embodiment. Not only the connection using the clip 32 but also a U-shaped arm or a connection part using a pawnette type arm may be used. Industrial applicability

The present invention can be applied when manufacturing various types of wiper blades corresponding to window glasses having different curvatures.

Claims

The scope of the claims

1. A wiper blade mounted on a wiper arm swingably provided on a vehicle and oscillating on a window glass to wipe the window glass, and a blade wrapper in contact with the window glass;

A first spring member provided on a wrapper holder that supports the blade wrapper, and applying a pressing force of the wiper arm to the play wrapper in a distributed manner;

A second spring member mounted on the blade wrapper and correcting a spring force of the first spring member.

2. The wiper blade according to claim 1, wherein the plurality of first spring members each formed in a rod shape are provided on the blade holder so as to be shifted from each other in a wiping direction, and the plurality of holding pieces for holding the blade wrapper are provided. A wiper blade fixed to a first spring member side by side at a predetermined interval.

3. The wiper blade according to claim 1, wherein the second spring member is a flat spring member mounted on the blade wrapper.