JPH0567565U - Wiper blade - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the flapping noise of the wiper blade. A holding claw 17 is provided in a wiper blade 1 including a blade rubber 10 in which a main body 15 and a wiping piece 16 are integrally formed, and a plurality of holding claws 17 connected to a wiper arm and holding the blade rubber main body 15. And the blade rubber main body 15 from the intermediate portion b to both end portions a and c.
As it goes to, the main body 15 is gradually twisted in the opposite direction with respect to a vertical line V orthogonal to the horizontal plane including the central axis of the main body 15. [Effects] When the wiping piece 16 of the blade rubber 10 performs the forward tilt posture changing operation, the changing operation sequentially shifts from one end side to the other end side, so that the fluttering noise due to the changing operation is reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiper blade, and more particularly to a wiper blade suitable for wiping a glass surface of a vehicle such as an automobile, for suppressing a so-called fluttering sound when folded back.

[0002]

[Prior Art]

 As a conventional wiper blade, a blade rubber integrally formed with a shaft-shaped body and a wiping piece for wiping a glass surface, and a lever having a plurality of holding claws connected to a wiper arm and holding the body of the blade rubber Some have groups.

In this wiper blade, the pressing force of the wiper arm is transmitted to the blade rubber via the lever group, and the wiping piece of the blade rubber is pressed against the glass surface.

[0004]

[Problems to be solved by the device]

 However, in the conventional wiper blade, an operating noise is generated when the glass surface is wiped with the reciprocating movement of the wiper arm. In particular, when the wiper blade is folded back and rotated, an impact sound, which is a so-called fluttering sound, is generated.

That is, in order to enhance the wiping effect, the wiper blade is configured such that the wiping piece of the blade rubber is in a forward tilted posture with respect to the glass surface. Therefore, the wiper blade is in a state of being pushed by the wiper arm via the lever group in a state where the wiping piece is in the forward tilted posture.

Then, when the wiper blade is turned back and turned over, the wiping piece of the blade rubber instantly changes its forward leaning posture to the opposite side over the entire length, so that a large impact sound is generated. This large impact sound becomes a so-called fluttering noise that is uncomfortable for the driver.

An object of the present invention is to provide a wiper blade that can reduce the fluttering noise when the wiper blade is turned over.

[0008]

[Means for Solving the Problems]

 A wiper blade according to the present invention has a blade rubber integrally formed with a shaft-shaped body and a wiping piece for wiping a glass surface, and a plurality of holding claws connected to a wiper arm and holding the body of the blade rubber. In a wiper blade including a lever group, the holding claw and the blade rubber main body are, with reference to a vertical line orthogonal to a horizontal plane including the central axis of the central part of the blade rubber main body, as going from the central part to both end sides. It is characterized by being gradually twisted in the opposite direction.

[0009]

[Action]

 According to the above-mentioned means, when the wiper blade moves while wiping the glass surface with the reciprocating movement of the wiper arm, the wiping piece of the blade rubber forms the forward tilted posture. Therefore, the wiper blade is effectively wiped.

When the wiper blade is turned back and turned over, the holding claw and the blade rubber body are twisted in the left and right directions, respectively, so that the wiping piece tilted forward is tilted forward in the opposite direction at the same time over the entire length. There is no change in the forward movement, and the forward movement of the forward leaning posture is sequentially transferred from one end to the other. Therefore, the impact noise during the forward tilt conversion operation of the wiping piece is suppressed to a low level.

[0011]

【Example】

 1 (a), 1 (b) and 1 (c) are enlarged partial cross-sectional views showing a wiper blade according to an embodiment of the present invention, and FIGS. 3 is an enlarged partial sectional view for explaining the tilting posture changing operation together with FIG. 1, and FIGS. 3A and 3B are an exploded perspective view of a wiper blade and a schematic front view showing a wiping state.

In this embodiment, the wiper blade 1 according to the present invention includes a blade rubber 10 and a lever group. The lever group includes a first lever 12, a second lever 13 rotatably supported by the first lever 12, and a third lever 14 rotatably supported by the second lever 13. . In the wiper blade 1, the intermediate portion of the first lever 12 is rotatably connected to the wiper arm 2, and the biasing force of the wiper arm 2 in the glass surface direction is applied to the second lever 13 and the second lever 13 via the lever group. 3 The levers 14 and the blade rubber 10 are distributed and evenly distributed at the connection points to press the blade rubber 10 against the glass surface 4, and the blade is reciprocally rotated about the wiper shaft 3 of the wiper arm 2. The rubber 10 is configured to wipe the glass surface 4.

The blade rubber 10 of the wiper blade 1 is integrally formed by using a relatively flexible rubber, and has a main body 15 formed in a shaft shape having a substantially rectangular cross section, and one main surface of the main body 15 ( Hereinafter, it will be referred to as a lower surface.) And a wiping piece 16 integrally formed on the side. Further, elongated grooves 15a are formed on both side surfaces of the blade rubber main body 15, and a vertebra 11 made of a thin plate-like elastic metal plate is fitted into the groove 15a in order to supplement the rigidity of the main body 15.

Further, on both side surfaces of the blade rubber main body 15, a connecting groove 15b is formed in an elongated shape below the groove 15a, and the blades of the second lever 13 and the third lever 14 are formed in the connecting groove 15b. The tip of a holding claw 17 having a rectangular C-shaped cross section formed at the connection point with the rubber 10 is inserted, and the holding claws 17 of the second lever 13 and the third lever 14 embrace the blade rubber body 15 and hold it. It is designed to be held slidably.

Therefore, the pressing force urged by the wiper arm 2 is substantially evenly distributed to the holding claws 17 via the levers 12, 13 and 14, and the force is applied between the holding claws 17 by the vertebra 11. The blade rubber 10 is dispersed on the wiping pieces 16 and comes into contact with the glass surface 4 over its entire length with a substantially uniform pressing force.

In the present embodiment, when the blade rubber 10 and the levers 13 and 14 are connected, the connecting points of the body 15 of the blade rubber 10 and the levers 13 and 14 are arranged at both ends in the longitudinal direction. A structure is adopted in which the left and right are twisted and connected in a twisted state.

That is, each holding claw 17 is formed such that the upper side pieces 17a thereof are inclined at different angles, and as shown in FIGS. 1, 2 and 3, the holding claw 17 and the blade are formed. As the body 15 of the rubber 10 goes from the middle part b to both ends a and c, respectively, the right and left are gradually reversed with reference to a perpendicular line V orthogonal to a plane including the axis of the middle part b of the blade rubber body 15. They are twisted symmetrically with respect to each other.

That is, on the tip C side of the wiper blade 10 (the side opposite to the wiper shaft 3), the wiper blade 10 is twisted counterclockwise with respect to the perpendicular V by an inclination angle θ, and the base end A side of the wiper blade 10 ( On the wiper shaft 3 side), it is twisted clockwise by an inclination angle θ with reference to the vertical line V.

Next, the operation will be described. When the wiper arm 2 reciprocates, the blade rubber 10 gradually wipes the glass surface 4 with the movement of the wiper blade 1 following the reciprocating rotation of the wiper arm 2.

At this time, the wiping piece 16 of the blade rubber 10 is, as shown in FIGS. 1 (a), (b) and (c) and FIGS. 2 (a), (b) and (c), Take a forward leaning posture. Therefore, the wiping effect of the blade rubber 10 is not inferior to that of the conventional blade rubber.

When the wiper arm 2 moves in the outward direction from the bottom side of the window glass surface 4 to the upper side, when the wiper arm 2 reaches the position immediately before the folding back inversion position, the state shown in FIG. It has become. That is, as shown in FIG. 1 (a), among the wiping pieces 16 of the blade rubber 10, the base end portion 16 a located on the base end A side of the wiper blade 10 is bent at the shallowest, and becomes gradually deeper from there. 1 (b), and finally, as shown in FIG. 1 (c), a tip of the wiping piece 16 of the blade rubber 10 located on the tip C side of the wiper blade 10. The end portion 16c is bent most deeply.

Next, when the wiper arm 2 reaches the upper turnaround reversal position and starts to move in the backward return direction, the wiping piece 16 of the blade rubber 10 becomes as shown in FIGS. 2 (a), (b) and (c). Change forward lean to the state shown.

When the wiping piece 16 is changed to the forward leaning posture, the holding claws 17 of the levers 13 and 14 and the blade rubber main body 15 are twisted in the left and right directions toward both ends. The forward tilting posture changing operation is sequentially shifted from the distal end portion 16c side to the proximal end portion 16a side.

That is, since the tip end 16c side of the wiping piece 16 located on the tip C side of the blade rubber 10 is inclined in such a direction that the blade rubber main body 15 is inclined in such a direction as to facilitate a forward tilted posture after conversion, the tip end portion thereof is 16c folds in the opposite direction fastest. In other words, the forward leaning posture changes. Then, as the wiper blade 1 moves, the folded back portion gradually propagates in the longitudinal direction of the wiping blade 16, and finally, the base end portion of the wiping blade 16 located on the base end A side of the wiper blade 1. 16a is folded back in the opposite direction.

Then, when the wiper arm 2 moves from the upper side of the window glass surface 4 to the bottom side and reaches the lower turnaround reversal position, the wiping piece 16 (the base end portion of the wiper blade 1 on the base end A side) 16a), the wiper blade 1 is gradually turned back as the wiper blade 1 is moved.

As described above, according to the present embodiment, when the wiping piece 16 of the blade rubber 10 changes its forward tilting posture, the forward tilting change operation of the wiping piece 16 is directed from its one end side to the other end side. Therefore, it is possible to prevent the impact force due to the forward tilting posture changing operation of the wiping piece 16 from acting strongly on the window glass surface 4 at once. As a result, it is possible to suppress the generation of a large impact sound due to the forward tilt posture changing operation of the wiping piece 16 of the blade rubber 10.

Further, according to the present embodiment, the wiping blade 16 is set so that the wiping piece 16 on the tip C side is folded back first when the wiper blade 1 is turned upside down. Is faster than that on the base end A side, the time difference between the tip portion 16c of the wiping strip 16 and the base end portion 16a can be increased, and the noise can be further reduced at the upper reversal position. Further, the upper inverted position of the wiper blade 1 is located closer to the driver's ear than the lower inverted position, which is convenient.

[0028]

[Effect of the device]

 As described above, according to the present invention, when the wiper blade is turned upside down, the forward tilt posture changing operation of the wiper blade wiping piece is configured to sequentially shift from one end side to the other end side. Therefore, it is possible to reduce the impact sound generated in the wiper blade wiping piece due to the forward tilting posture changing operation.

[Brief description of drawings]

FIG. 1 is an enlarged partial sectional view showing a wiper blade according to an embodiment of the present invention.

FIG. 2 is an enlarged partial cross-sectional view for explaining the forward tilting posture changing operation of the wiping piece together with FIG.

FIG. 3 is an exploded perspective view of a wiper blade and a schematic front view showing a wiped state.

[Explanation of symbols]

10 ... Blade rubber, 11 ... Vertebra, 12 ... First
Lever, 13 ... Second lever, 14 ... Third lever, 15 ...
Blade rubber body, 16 ... Wiping piece, 16a ... Proximal end of wiping piece, 16b ... Central part of wiping piece, 16c ... Tip of wiping piece, 17 ... Holding claw, V ... Vertical line, θ ... Inclination angle, A ... Base end of wiper blade, B ... Tip of wiper blade.

Claims (1)

[Scope of utility model registration request] 1. A blade rubber integrally formed with a shaft-shaped main body and a wiping piece for wiping a glass surface, and a lever group having a plurality of holding claws connected to a wiper arm and holding the main body of the blade rubber. In the wiper blade provided with, the holding claw and the blade rubber main body, as going from the central portion to both ends, gradually in the opposite direction with respect to a vertical line orthogonal to a horizontal plane including the central axis of the blade rubber main body. A wiper blade characterized by being twisted.