JP2003312448A - Wiper blade support structure in wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively absorb vibration of a wiper blade when supporting a wiper shaft side part of the wiper blade installed in a wiper arm tip part by a support member. <P>SOLUTION: While arranging a support receiver 14 in the wiper shaft side part of the wiper blade 3, a stabilizer 13 is arranged in the tip part of a wiper arm 1. A side piece part 13b for constituting the stabilizer 13 is composed of a high strength-imparted second side wall 13g positioned outside, and a high spring characteristic-imparted first side wall 13f positioned inside to be fitted around the support receiver 14. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a wiper blade supporting structure in a wiper device installed in a vehicle such as a private car, a truck or a bus.

[0002]

2. Description of the Related Art Generally, some wiper devices of this type include
In some cases, the wiper blade provided at the tip of the wiper arm is reciprocally reversed to wipe the window surface as the wiper shaft integrally attached to the base end of the wiper arm is driven to rotate. In this type, the middle part of the wiper blade is swingably supported on the tip end of the wiper arm via a pivot shaft substantially orthogonal to the arm length direction, and the reciprocal reversal of the wiper arm is accompanied by the forward and reverse rotation drive of the wiper shaft. The wiper blade is generally configured to wipe the window surface following the swing. By the way, in such a wiper device, for example, in the case of a large wiper device where a long wiper blade is wiped, when the range of reciprocal reversing swing is widened, it is the wiper shaft side portion of the wiper blade. The wiping speed of the distal end side tends to be slower than that of the front end side, the followability to the wiper arm may be deteriorated, and the wiper blade may vibrate finely to generate abnormal noise. Therefore, it has been proposed that the end side of the wiper blade is supported by a support member provided on the wiper arm to enhance the followability to the wiper arm or prevent the vibration of the wiper blade to reduce the generation of abnormal noise. For example, the one disclosed in Japanese Patent Publication No. 2001-501893 is known. In this structure, the support member has a structure in which a groove-shaped support recess is provided in the wiper arm, a support receiver is integrally provided on the wiper blade side, and the support receiver is slidably fitted in the support recess. With this configuration, the wiper blade is allowed to swing in the window surface direction.

[0003]

Since the conventional supporting member is a connecting member for forcing the wiper blade to follow the movement of the wiper arm side, a large load is applied during the wiping operation. . For this reason, the support recess of the support member must be made of a material having high strength. However, in this case, the springiness of the support recess is reduced and the entire support member receives the vibration of the wiper blade as it is. However, there is a problem that not only abnormal noise is generated at the supporting member portion but also the supporting member is worn and durability is deteriorated, and there is a problem to be solved by the present invention. Furthermore, the support member is
The wiper blade is slidable with respect to the support receiving body so as to allow the swinging of the wiper blade in the window surface direction. However, in the above-mentioned conventional one, the support member and the support receiving body are in surface contact with each other. However, there is a problem in that the slidability is poor and the swinging of the wiper blade is not smooth, and there is also a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and a wiper shaft integrally attached to a base end portion of a wiper arm is provided. In the wiper device in which the wiper blade attached to the tip of the wiper arm wipes the window surface in accordance with the forward and reverse rotation drive, the wiper blade is elastically slidably supported by the support member provided on the wiper arm. It is characterized by being supported. By doing so, it is possible to effectively absorb the vibration of the wiper blade. In this one,
The support member of the present invention can be characterized in that the side piece of the support recess that is externally fitted to the wiper blade is composed of a plurality of side walls having a gap therebetween, and this is done. As a result, the strength of the support member can be increased while effectively absorbing the vibration of the wiper blade. Further, in this structure, the plurality of side walls of the present invention can be characterized in that the outer side has higher strength and the inner side has higher spring characteristics. Furthermore, in this structure, the side piece of the supporting member of the present invention is composed of an outer side wall having a high strength and an inner side wall having a lower spring strength but a higher strength than the outer side wall. Can be characterized. Moreover, in this thing, the inner side wall of the present invention can be characterized by being branched from the outer side wall. Furthermore, in this, the wiper blade of the present invention is supposed to swing in the window surface direction with reference to the intermediate portion supported by the wiper arm,
The inner surface of the innermost side wall of the support member may be characterized in that a plurality of ribs long in the window surface direction for making linear contact with the wiper blade are formed, whereby the stabilizer is provided. It is possible to smoothly swing the wiper blade in the window surface direction with respect to. Further, in this, the facing interval of the innermost side walls of the supporting member of the present invention is formed to be narrower than the supported portion of the wiper blade supported by the supporting member. can do.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
~ It demonstrates based on the drawing shown in FIG. In the drawing,
Reference numeral 1 is a wiper arm of a wiper device. The wiper arm 1 has a base end integrally fixed to a pivot shaft (wiper shaft) 2 rotatably supported by a vehicle body, and the wiper arm 1 is fixed to the wiper arm 1 in a positive direction. The wiper arm 1 is set to reciprocally oscillate based on the reverse rotation, and the wiper blade 3 attached to the tip of the wiper arm 1 wipes the window surface. , All have the same configurations as conventional ones.

The wiper arm 1 has an arm support 4 whose base end is integrally attached to the pivot shaft 2 and a pin 4a whose base end is supported at the tip of the arm support 4 in a direction orthogonal to the arm length direction. And an arm shank 5 that is supported via the arm shank 5 and is swingably connected to the window surface in a direction in which the arm shank 5 is separated from and in contact with the window surface (window direction). And an arm piece 6 connected to the. And the arm piece 6
U-shaped bent support (not shown) at the tip of the
Is formed, and the wiper blade 3 is provided on the support portion.
Are set so as to be connected and supported. Further, the wiper arm 1 is provided with an unillustrated ammunition between the tip end of the arm support 4 and the base end side of the arm shank 5, and urges the support portion on the tip end side of the arm piece 6 toward the window surface side. Is set.

On the other hand, the wiper blade 3 is formed in a long shape and is composed of a rubber blade rubber 8 and a blade lever 9 for supporting the blade rubber 8. The blade lever 9 supports the blade rubber 8 at a plurality of positions in the longitudinal direction.
The first lever 10 constituting the
0a is provided, and a clip 10b for connection with the wiper arm 1 is swingably supported on the pin 10a.
Further, both longitudinal end portions 10c, 10 of the first lever 10
The intermediate portion in the longitudinal direction of the second lever 11 is pivotally supported at d by the pins 10e, respectively, and corresponds to the end portion on the wiper shaft 2 side of the both end portions of the first lever 10. A support receiving body 14 for externally fitting a stabilizer (corresponding to a supporting member of the present invention) 13 described later is attached to the first lever end portion 10d in a retaining shape. Further, at both ends of the pair of second levers 11, four longitudinal intermediate portions of the third levers 12 are further provided, respectively.
The support piece portions 12a, which are integrally pivotally supported on both ends of the third lever 12, are pivotally supported via 1a.
The blade rubber 8 is set so as to fixedly support eight upper end portions (portions away from the window surface direction) in the longitudinal direction. The wiper blade 3 thus configured has the clip 10a of the first lever 10 that constitutes the blade lever 9.
, By releasably engaging the arm piece support,
It is set to be connected to the wiper arm 1.

The support receiver 14 has an upper piece 14a and
The upper piece portion 14a has side piece portions 14b extending from both left and right edges in the window surface direction to form a recessed portion, and the first lever end portion 10d is fitted into the recessed portion. Is set. Further, each side piece 14b of the support receiving body 14 is provided with a through hole 14c for loosely fitting both outwardly protruding end portions of the pivot pin 10e arranged at the first lever end portion 10d. In addition, engaging claws 14d for engaging with the first lever end portion 10d in a retaining manner are formed at the lower ends of the side pieces 14b. Further, the support receiver 14 is attached to the wiper blade 3
The pin 10 exposed from the through hole 14c when attached to the
Both end portions of e are set to be substantially flush with the outer side surfaces of the support receiving body both-side pieces 14b and slightly retracted from the outer side surfaces.

The arm shank 5 extends toward the window surface from the upper piece portion 5a facing the window surface and both side edge portions of the upper piece portion 5a (side edge portions in the swinging direction of the wiper arm 1). And a pair of side piece portions 5b. The base end of the arm piece 6 is fixed along the inner side surface on the tip side of the arm shank upper piece 5a, and is covered by the upper piece 5a. The part is the wiper blade 3
The first lever end portion 10d is opposed to which the stabilizer 13 is set to be fixed.

The stabilizer 13 is made of a resin material, and has an upper piece 13a facing the window surface.
And a pair of side piece portions 13b extending from both side edge portions of the upper piece portion 13a toward the window surface side, the support recessed portion 13c having a substantially U-shaped cross section, and the supporting recess portion 13c extending to the upper piece portion 13a. The mounting piece 13d that is provided and fixed to the upper piece 5a of the arm shank 5 fixing portion of the arm shank 5 is integrally molded. Further, a pair of attachment through holes 13e adjacent to each other in the arm length direction are formed in the attachment piece portion 13d. On the other hand, the arm piece 6 is riveted to the inner side surface of the arm shank upper piece 5a, and the base end of the arm piece 6 has a screw hole facing the pair of through holes 13e of the mounting piece 13d. (Not shown) has been opened. Then, the stabilizer mounting piece 13d is applied to the lower side surface (window side surface) of the base end portion of the arm piece 6, and a screw (not shown) penetrating the mounting through hole 13e is screwed into the screw hole of the arm piece 6 to form a stabilizer. 13 is set to be fixedly attached to the arm piece 6 (arm shank 5) in a positioning manner. At this time, the arm piece 6 is fixed to the arm shank upper piece portion 5a, and one side piece portion 5b of the arm shank 5 faces between the stabilizer mounting piece 13d and the stabilizer upper piece portion 13a. An inclined piece 13j is provided between the attachment piece 13d and the stabilizer upper piece 13a.
Are formed so that the stabilizer 13 does not interfere with the arm shank side piece 5b.

Further, the pair of side piece portions 13b of the stabilizer 13 are respectively arranged inside the pair of first side walls 1b.
3f (corresponding to the inner wall of the present invention) and the first side wall 13
Two side walls, that is, a pair of second side walls 13g (corresponding to the outer side walls of the present invention) formed with a predetermined gap between them and f, are respectively configured. The first side wall 13f is formed to be narrower than the width of the support receiving body 14 in the wiping direction, and is set so as to be externally fitted to the support receiving body 14 in a resilient manner. Here, each of the second side walls 13g extends in a bent shape from the left and right edge portions of the upper piece portion 13a toward the window surface direction, and the first side wall 13f includes the second side wall 13g at the base end side (upper side). It is formed by including a base end piece 13h protruding inward from the inner side surface of the piece 13a side). Then, when the first side wall 13f receives a load in the window surface wiping operation direction, the load can be received by the second side wall 13g via the base end piece 13h.

Further, the first side wall 13 located on the inner side.
The f is formed in a thin plate shape so as to impart a spring characteristic to effectively absorb the vibration, and the facing distance between the inner surfaces of the pair of first side walls 13f is, as described above, dependent on the portion. It is set to be narrower than the width in the wiping direction of the support receiving body 14 to be fitted, and the first side wall 13f is set to elastically hold the support receiving body 14. On the other hand, the outer second side wall 13g is formed to be thicker than the first side wall 13f, so that the spring characteristics are reduced but high strength is imparted. Accordingly, the stabilizer 13 directly supports the wiper blade 3 during the wiping operation of the wiper blade 3, and the first sidewall 13f having high spring characteristics effectively absorbs the vibration due to the gap between the first sidewall 13f and the second sidewall 13g. On the other hand, the second side wall 13g having high strength is set to receive the load in the wiping operation direction from the first side wall 13f connected via the base end piece 13h.

Further, on the inner side surface of the first stabilizer side wall 13f, a plurality of ribs 13i (four in this embodiment) that are long in the window direction and project inward are arranged in parallel in the arm length direction. Has been formed. When the stabilizer 13 is fitted onto the support receiving body 14, the ribs 1
The tip of 3i is set so as to elastically contact the outer side surface of the support receiving body both-sides 14b. When the wiper arm 1 swings back and forth in this mounted state, the end portion of the wiper blade 3 is restricted in movement in the swinging direction by the side piece 13b of the stabilizer 13, and the vibration is absorbed by the first side wall 13f. In addition, the swinging of the wiper blade 3 with respect to the wiper arm 1 in the direction of the window surface is allowed by allowing the tip of the rib 13i to slide on the outer side surface of the support receiver side piece 14b. It is set.

In the embodiment of the present invention constructed as described above, the wiper arm 1 is provided with a stabilizer 13 which supports the wiper blade 3 so as to regulate the movement of the wiper shaft 2 side portion. In this case, the pair of side pieces 13b of the stabilizer 13 are formed by the first and second side walls 13f and 13g, respectively, which are formed with a gap therebetween, and have increased strength against a load in the wiping operation direction. In addition, the support receiver 1 on the wiper blade 3 side
The first side wall 13f on the inner side of which 4 is directly externally fitted effectively absorbs the vibration on the wiper blade 3 side by the gap between the first side wall 13f and the second side wall 13g. As a result, the strength of the stabilizer 13 can be ensured without lowering the strength for effectively absorbing the vibration of the wiper blade 3, and the wiper device 1 can be quietly and smoothly wiped. Therefore, the quality can be improved.

Moreover, in this structure, the outer second side wall 1 is provided.
Since 3g absorbs vibration by the inner first side wall 13f which is arranged with a gap, the inner first side wall 13f gives higher spring characteristics to more effectively absorb vibration. be able to. Moreover, since the outer second side wall 13g does not directly participate in the vibration of the wiper blade 3, it is possible to increase the strength of the second side wall 13g without reducing the vibration absorption by the first side wall 13f. Therefore, regarding the strength increase of the second side wall 13g, it is possible to increase the strength as desired to cope with the decrease in durability due to wear or the like regardless of vibration absorption.

Further, in the embodiment of the present invention, the first side wall 13f is formed in a branched shape from the inner side surface of the second side wall 13g via the base end piece 13h. Therefore, the load from the first side wall 13f can be received by the second side wall 13g having high strength. Further, in this structure, a plurality of ribs 13i are formed on the inner surface of the first side wall 13f so that the protruding end of the rib 13i and the support receiver 14 of the wiper blade 3 come into contact with each other in a line contact manner. ing. Therefore, when the wiper blade 3 swings in the window surface direction along the curved surface of the window surface, the support receiver 14 of the wiper blade 3 and the stabilizer 13 fixed to the wiper arm 1 are supported by the support receiver. Both sides 14b
The outer side surface and the rib 13i projecting end are slid in line contact with each other. As a result, the wiper blade 3 is effectively subjected to the swing regulation in the wiping swing direction by the both side portions 13b of the stabilizer 13, and the wiper blade 3 is allowed to swing in the window surface direction with a small sliding resistance. It means that,
It is possible to provide a high-performance and high-quality wiper device, in which the wiping operation of the window surface by the wiper blade 3 is not impaired and can be smoothly performed to improve durability.

Moreover, in this structure, the stabilizer 13 is structured such that it is screwed and fixed to the screw hole formed in the arm piece 6 at the portion where the arm piece 6 is fixed to the arm shank 5. Since no special positioning is required and the mounting piece 13d is covered by the arm shank upper piece 5a, the design is excellent.

The present invention is of course not limited to the above-mentioned embodiment, but can also be applied to the second embodiment shown in FIG. In this structure, of the side pieces 16b of the stabilizer 16, the first side wall 16f having a high spring characteristic that directly supports the wiper blade and absorbs vibrations.
Is extended from the upper piece portion 16a, and the rest of the configuration is the same as that of the above-described embodiment, and even in this case, the vibration can be absorbed by the first side wall 16f. Incidentally, in the case of the first embodiment, as a result of the first side wall 13f and the second side wall 13g being connected via the base end piece 13h, when the first side wall 13f absorbs vibrations, the second side wall Further vibration absorption can be expected due to 13g resonating. Further, the stabilizer can be directly attached to the wiper arm without interposing the support receiver while allowing the swing of the wiper arm in the window surface direction. Further, the stabilizer may be provided so as to cover the upper part of the arm shank, and in this case, for example, the upper part of the stabilizer may be screwed onto the arm piece.

[Brief description of drawings]

FIG. 1 is a front view of a wiper device.

FIG. 2 is a perspective view of a wiper device.

3A and 3B are a side view of a wiper blade and a cross-sectional view taken along line XX of FIG. 3A, respectively.

FIG. 4 is a perspective view of a stabilizer.

FIG. 5 is a front view of a stabilizer.

FIG. 6 is a plan view of a stabilizer.

FIG. 7 is a bottom view of the stabilizer.

FIG. 8 is a front view of a stabilizer according to a second embodiment.

[Explanation of symbols]

1 wiper arm 2 pivot axes 3 Wiper blade 4 arm support 5 arm shank 6 arm pieces 7 ammo 8 blade rubber 10 First lever 10d First lever end 11 Second lever 13 Stabilizer 13b side piece 13f First side wall 13g Second side wall 13h Base end piece 13i rib 14 Support receiver 13b side piece

Claims (7)

[Claims] 1. A wiper device in which a wiper blade attached to a tip end portion of a wiper arm wipes a window surface in accordance with forward / reverse rotation driving of a wiper shaft integrally attached to a base end portion of the wiper arm. A wiper blade support structure in a wiper device, wherein the wiper blade is elastically supported by a support member provided on the wiper arm in a slidable state. 2. The wiper blade in a wiper device according to claim 1, wherein the support member has a side piece of a support recess that is fitted on the wiper blade, the side piece being composed of a plurality of side walls having a gap. Support structure. 3. The wiper for a wiper device according to claim 1, wherein the plurality of side walls are configured such that the outer side wall has higher strength and the inner side wall has higher spring characteristics. Blade support structure. 4. The side piece of the support member according to claim 1, wherein the side piece of the support member comprises an outer side wall having a high strength and an inner side wall having a lower spring strength but a higher strength than the outer side wall. A wiper blade support structure in a wiper device characterized by being provided. 5. A wiper blade support structure in a wiper device according to claim 4, wherein the inner inner wall is branched from the outer wall. 6. The wiper blade according to claim 1, wherein the wiper blade swings in the window surface direction with reference to an intermediate portion supported by the wiper arm, and the innermost side wall of the support member is provided. A wiper blade support structure in a wiper device, wherein a plurality of long ribs are formed on an inner surface of the wiper blade so as to make linear contact with the wiper blade. 7. A support member according to claim 2, wherein the innermost side walls of the support member are opposed to each other at a distance smaller than that of a supported portion of the wiper blade supported by the support member. A wiper blade support structure in a wiper device characterized in that.