JPH08577U - Wiper device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a wiper blade when a wind pressure is applied from the front when the vehicle is traveling, when the wiper blade is located between the lower reversal position and the upper reversal position of the windshield surface, especially in the intermediate position. Prevent the blade from rising,
Get a good wiping surface. A wiper lifting prevention fin 1 is formed in a substantially rectangular shape, and has a main wind receiving portion 2c having a main wind receiving surface 2a arranged in parallel along a wiper blade 11,
A fin main body portion 2 that is formed to have a short width that is continuous with the main wind receiving portion 2c and that is shorter than the short width of the main wind receiving portion 2c, and that is attached to the wiper arm 12.
And the bent portion 4 continuous with the mounting portion 5 of the fin body 2.
Is formed to extend toward the wiper blade 11 through
The curved surface 4a of the bent portion 4 is attached to the main wind receiving surface 2a of the main wind receiving portion 2c.
And a fin auxiliary portion 3 having an auxiliary wind receiving surface 3a that is smoothly continuous through.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a wiper device for wiping the windshield surface of an automobile, particularly when the wiper blade is located between its lower reversal position and its upper reversal position and receives wind pressure from the front during traveling. , The present invention relates to a wiper device having a wiper lifting prevention fin that prevents the wiper blade from lifting from the windshield surface.

[0002]

[Prior art]

 A first conventional example of a conventional wiper device will be described with reference to FIGS. 6 and 7, and a second conventional example will be described with reference to FIGS. 8 and 9.

A wiper lifting prevention fin 101 of a wiper device according to a first conventional example illustrated in FIG. 6 includes a fin main body 102 having a flat wind receiving surface 102 a, and a wind receiving surface of the fin main body 102. And a mounting portion 103 to the wiper arm integrally provided on the back side of the fin body portion 102 and on one end side of the fin body portion 102.

The wiper arm mounting portion 103 is provided with wiper arm mounting holes 103a and 103b.

As shown in FIG. 7, the wiper lift-up prevention fin 101 having the above-described configuration is provided along the wiper blade 111 in the blade assembly 110 of the wiper apparatus that connects the wiper blade 111 and the wiper arm 112. It is attached to the wiper arm 112 in the vicinity of the connecting portion 113 between the wiper blade 111 and the wiper arm 112.

Further, the wiper blade 111 is connected to a wiper arm 112 which uses a wiper motor (not shown) as a driving means, and swings on the windshield surface 114 to wash the wiping surface 115 to improve visibility. There is.

The wiper lifting prevention fin 101 provided on the wiper arm 112 shown by the phantom line is located at the lower reversal position of the blade assembly 110, and the air flow rising along the windshield surface 114 causes the wiper lifting prevention fin. In the case of the arrow γ direction with respect to 101, since the wind direction of the air flow is close to a right angle with respect to the longitudinal direction of the wind receiving surface 102a of the wiper lifting prevention fin 101. The surface 102a receives wind pressure and applies a sufficient pressing force to the wiper blade 111 via the wiper arm 112, and presses the wiper blade 111 against the windshield surface 114 to prevent the surface from rising.

Next, the wiper floating prevention fin 121 of the wiper device in the second conventional example illustrated in FIG. 8 has a fin body 122 formed by bending a flat plate into a dogleg shape, and the fin body 122. The dent side is the wind receiving surface 122a, and the back side of the wind receiving surface 122a and the wiper arm mounting portion 123 integrally provided on one end side of the fin body 122.

The wiper arm mounting portion 123 is provided with wiper arm mounting holes 123a and 123b inclined with respect to the wind receiving surface 122a.

As shown in FIG. 9, the wiper lift-up prevention fin 121 having the above-described structure is used in the blade assembly 130 of the wiper apparatus in which the wiper blade 131 and the wiper arm 132 are connected to each other, as shown in FIG. Is attached to the wiper arm 132 in the vicinity of the connecting portion 133 between the wiper blade 131 and the wiper arm 132.

Further, the wiper blade 131 is connected to a wiper arm 132, which uses a wiper motor (not shown) as a driving means, and swings on a windshield surface 134 to wash the wiping surface 135 and improve visibility. There is.

The wiper lifting prevention fin 121 provided on the wiper arm 132 shown in phantom is in the lower reversal position, and the air flow rising along the windshield surface 134 is against the wiper lifting prevention fin 121. In the case of the arrow ε direction, wind pressure is applied from a direction close to a right angle with respect to the longitudinal direction of the wind receiving surface 122a of the wiper floating prevention fin 121, so that the wiper blade 131 is provided with sufficient wind pressure via the wiper arm 132. A pressing force is applied to press the wiper blade 131 against the windshield surface 134 to prevent it from floating.

[0013]

[Problems to be solved by the device]

 However, in the wiper lifting prevention fin 101 in the former wiper device among such conventional wiper devices, the wiper blade 111 is located between the lower reversal position and the upper reversal position and extends along the windshield surface 114. When the rising airflow is in the direction of the arrow δ with respect to the wiper floating prevention fin 101, the airflow becomes an oblique direction with respect to the longitudinal direction of the wind receiving surface 102a of the wiper floating prevention fin 101. The surface 102a cannot receive the desired wind pressure. Therefore, the force for pressing the wiper blade 111 against the windshield surface 114 via the wiper arm 112 becomes insufficient, and there is a problem that the wiper blade 111 may float.

In the latter wiper lifting prevention fin 121 in the latter wiper device, the wiper blade 131 is located between the lower reversal position and the upper reversal position, and the air flow rising along the windshield surface 134 lifts the wiper. When the direction of the arrow ζ is against the prevention fin 121, the airflow is oblique to the longitudinal direction of the wind receiving surface 122a of the wiper floating prevention fin 121, so that the wind receiving surface 122a is desired. Can not receive the wind pressure of. Therefore, the force of pressing the wiper blade 131 against the windshield surface 134 via the wiper arm 132 becomes insufficient, and there is a problem that the wiper blade 131 may rise.

As described above, in the wiper device having the above-mentioned wiper lifting fins 101 and 121, the direction along the windshield surfaces 114 and 134 between the lower reversal position and the upper reversal position of the wiper arm, particularly in the middle position. In addition, when the wind pressure is applied from below, the force for pressing the respective wiper blades 111, 131 against the respective windshield surfaces 114, 134 becomes insufficient, so that the wiper blades 111, 131 become in contact with the windshield surfaces 114, 134. There is a problem in that it may not be possible to obtain good wiping surfaces 115 and 135 because the surface may be lifted up.

[0016]

[Object of the invention]

 The present invention has been made by paying attention to such a conventional problem, and the wiper blade is located between the lower reversal position and the upper reversal position of the windshield surface, particularly in the intermediate position, and when the vehicle is traveling. It is an object of the present invention to provide a wiper device which can prevent the wiper blade from rising when a wind pressure is applied from the front direction and can obtain a good wiping surface.

[0017]

[Means for Solving the Problems]

 A wiper device according to the present invention includes a wiper blade that swings on a windshield surface of an automobile to wipe a wiping surface between an upper reversal position and a lower reversal position, and the wiper blade is connected to each other. A wiper arm that swings the wiper blade, and a wind receiving surface that is connected to the wiper arm and receives the wind pressure of the airflow rising along the windshield surface, and applies a pressing force to the wiper blade to apply the pressing force to the wiper blade. In a wiper device having a wiper lift-up prevention fin for preventing the lift-up of the wiper from the windshield surface, the wiper lift-up prevention fin is formed in a substantially rectangular shape and is arranged in parallel along the wiper blade. A main wind receiving portion having a main wind receiving surface and a short portion of the main wind receiving portion which is continuous with the main wind receiving portion. The fin body is formed to have a width shorter than that of the fin body, and the fin body includes a mounting portion that is attached to the wiper arm, and the fin body portion extends in the wiper blade direction through a bent portion that is continuous with the mounting portion of the fin body portion. The main wind receiving surface of the main wind receiving portion is provided with a fin auxiliary portion having an auxiliary wind receiving surface that smoothly continues through the curved surface of the bent portion. The wiper device is characterized in that it is used as a means for solving the above-mentioned conventional problems.

[0018]

[Function of the device]

 In the wiper device having such a configuration, the windshield surface of the windshield is oscillated from the lower reversal position side to the upper reversal position side or from the upper reversal position side to the lower reversal position side. When the wind pressure of the air flow from the front to the bottom to the top along the windshield surface is received, when the wiper blade is in the middle between the lower reversal position and the upper reversal position, the main part of the fin body of the wiper lifting prevention fin is The longitudinal direction of the main wind receiving surface of the wind receiving portion is a direction near 45 ° with respect to the wind pressure direction. Therefore, the pressing force on the windshield side caused by the wind pressure on the main wind receiving surface of the wiper floating prevention fin is weaker than when the wiper blade is located at the lower inverted position of the windshield surface or in the vicinity thereof. Will be things.

On the other hand, at this time, the direction of the wind pressure received by the auxiliary wind receiving surface of the fin assisting portion located at the wiper arm pivotally supporting end of the fin main body is such that the fin auxiliary portion is in the direction of the wiper blade from the fin main body portion. Since it is formed so as to extend to, the fin auxiliary portion is in a state close to a right angle to the longitudinal direction. Therefore, the pressing force to the windshield side, which is generated by the wind pressure received by the auxiliary wind receiving surface of the fin auxiliary portion, becomes stronger than when the wiper blade is located at or near the lower reversal position.

Therefore, when the wiper blade is located at the intermediate position between the lower reversal position and the upper reversal position of the windshield surface and the windshield wiper blade receives the wind pressure due to the air flow rising along the windshield surface, the fin A desired pressing force is obtained by the auxiliary wind receiving surface of the auxiliary portion. Therefore, the wiper blade is pressed against the windshield surface to prevent the wiper blade from rising.

Further, when the wiper blade swings between the lower reversal position side and the upper reversal position side, the respective directions of the fin main body portion and the fin auxiliary portion with respect to the direction of wind pressure change every moment, Since the main wind receiving surface of the fin main body and the auxiliary wind receiving surface of the fin auxiliary portion are smoothly continuous through the curved surface of the bent portion continuous to the mounting portion, the fin body portion, the bent portion, and the Any part of the fin assisting part receives the wind pressure almost from the front, and the wiper blade is pressed against the windshield surface without interruption.

[0022]

【Example】

 An embodiment of the wiper device according to the present invention will be described with reference to FIGS.

As shown in FIGS. 1 to 4, the wiper lift-up prevention fin 1 of this wiper device includes a fin main body 2 that receives the largest wind pressure near the lower reversal position I shown in FIG. 5, and also shown in FIG. The wiper arm 12 is provided with a fin auxiliary portion 3 that receives the largest wind pressure near an intermediate position H between the lower reversal position I and the upper reversal position J.

The fin main body 2 is formed in a generally rectangular shape as a whole, has a main wind receiving surface 2 a that is curved toward the wind shield surface 14 in the short width direction, and the main wind A main wind receiving portion 2c provided with a ridge 2b on the back side of the receiving surface 2a, and a short width that is shorter than the short width of the main wind receiving portion 2c and is smoothly continuous to the main wind receiving surface 2a, and The wiper arm mounting portion 5 has a wind receiving surface 2d whose radius of curvature is smaller than that of the main wind receiving surface 2a and whose width direction is curved toward the windshield surface 14 side.

The wiper arm mounting portion 5 integrally supports and fixes a plurality of tubular bodies 6a and 6b and the tubular bodies 6a and 6b on the back side of the wind receiving surface 2d which is continuous with the main wind receiving surface 2a. Through ribs 7a and 7b, and through holes 8a and 8b are provided at the respective axial centers of the cylindrical bodies 6a and 6b.

The fin auxiliary portion 3 has a flat plate shape and is formed integrally with the wiper arm attachment portion 5 of the fin body portion 2 via the bent portion 4 and extends in the direction of the wiper blade 11. The wind-receiving surface 2d of the wiper arm mounting portion 5 has an auxiliary wind-receiving surface 3a that is a flat surface that smoothly continues through the curved surface 4a of the bent portion 4.

As shown in FIG. 5, such a wiper lift-up prevention fin 1 is parallel to the wiper blade 11 and the wiper blade 11 in the blade assembly 10 formed by connecting the wiper blade 11 and the wiper arm 12. It is attached to the wiper arm 12 in the vicinity of the connecting portion 13 with the wiper arm 12.

The wiper blade 11 is connected to a wiper arm 12 driven by a wiper motor (not shown), and swings on the windshield surface 14 to wash the wiping surface 15.

In this wiper device, as shown by the phantom line in FIG. 5, the wiper lifting prevention fin 1 provided on the wiper arm 12 is located near the lower reversal position I of the windshield surface 14, and When the wind direction of the air flow rising along 14 is in the direction of the arrow α, the wind direction is different from the longitudinal direction of the wind receiving surfaces 2a and 2d of the fin body 2 of the wiper floating prevention fin 1. It will be close to a right angle. Therefore, the wind receiving surfaces 2a and 2d of the fin main body 2 receive a larger wind pressure and apply a pressing force to the wiper blade 11 through the wiper palm 12, so that the wiper blade 11 is pressed against the windshield surface 14. Lifting will be blocked.

On the other hand, as indicated by the solid line in FIG. 5, the wiper blade 11 is located between the lower reversal position I and the upper reversal position J of the windshield surface 14, especially near the intermediate position H, and the windshield surface 14 If the wind direction of the air flow rising along the direction is the arrow β direction, the air flow is 45 ° with respect to each longitudinal direction of the wind receiving surfaces 2a, 2d of the fin body 2 of the wiper floating prevention fin 1. Or, since it is an oblique direction from an angle close to it, the wind pressure received by both wind receiving surfaces 2a, 2d does not become so large.

At this time, since the auxiliary wind receiving surface 3a of the fin auxiliary portion 3 is formed to extend in the wiper blade 11 direction with respect to the wind receiving surfaces 2a and 2d of the fin main body portion 2, The fin auxiliary portion 3 receives a larger wind pressure in a state close to a right angle with respect to the longitudinal direction. Therefore, since the wiper blade 11 is pressed against the windshield surface 14 with a larger pressing force via the wiper arm 12, the wiper blade 11 is prevented from rising.

Therefore, when the wiper blade 11 is located between the lower reversal position I and the upper reversal position J, particularly in the intermediate position H, the pressing force due to the wind pressure received by the wind receiving surfaces 2a and 2d of the fin body 2 is reduced. However, since the pressing force of the wind pressure received by the auxiliary wind receiving surface 3a of the fin auxiliary portion 3 increases, the pressing force of the wind pressure received by the wiper lifting prevention fin 1 as a whole presses the wiper blade 11 against the windshield surface 14. When the wiper blade 11 is swinging on the windshield surface 14 and receives wind from the front when the vehicle is traveling, the fin body 2 with respect to the direction of wind pressure is applied. The respective directions of the fin auxiliary portion 3 and the fin auxiliary portion 3 change every moment, but the main wind receiving surface 2a of the fin body portion 2 and the fin auxiliary portion 3 are assisted. Since the wind receiving surface 3a is smoothly continuous through the curved surface 4a of the bent portion 4 which is continuous with the wiper arm attachment portion 5, any one of the fin main body portion 2, the bent portion 4 and the fin auxiliary portion 3 is provided. The portion receives the wind pressure almost from the front, and the wiper blade 11 is pressed against the windshield surface 14 without interruption, and the floating is prevented.

[0033]

As described above, since the wiper device according to the present invention has the above-described structure, the wiper blade is in the lower reversal position or the upper reversal position of the shielded surface when the vehicle is running. In particular, it is necessary to prevent the wiper blade from rising above the windshield even when the wiper blade is passing through the intermediate position between the two reversal positions while receiving wind pressure from the front. This has the excellent effect that the wiping surface on the windshield surface can be wiped well at any time during operation.

[Brief description of drawings]

FIG. 1 is a front explanatory view (a) and a plan explanatory view (b) of a wiper lifting prevention fin according to an embodiment of a wiper device according to the present invention.

2 is a left side explanatory view (a), a partial bottom side explanatory view (b), and FIG. 1 (b) of the wiper floating prevention fin shown in FIG.
2A is a sectional view taken along line AA of FIG. 1, FIG. 1B is a sectional view taken along line BB of FIG. 1B, FIG. 2B is a sectional view taken along line CC of FIG. FIG. 7B is a sectional view taken along line DD of FIG.

3A is an explanatory view from the direction of arrow E in FIG. 2A, and FIG. 3B is a right side view of the fin auxiliary portion of the wiper lift-up prevention fin shown in FIG.
3C is a cross-sectional view taken along line FF of FIG. 3A, FIG. 3D is a view taken from the direction of arrow G in FIG. 3A, and H- of FIG.
It is a H line cross section explanatory view (e).

FIG. 4 is a perspective explanatory view from the front side (a) and a perspective explanatory view from the back side (b) of the wiper floating prevention fin shown in FIG.

FIG. 5 is an operation state explanatory diagram showing the relationship between the position of the wiper arm and the direction of the air flow during operation of the wiper device.

FIG. 6 is a perspective explanatory view illustrating a wiper lifting prevention fin of a wiper device according to a first conventional example with an intermediate portion omitted.

7 is an operation state explanatory diagram showing the relationship between the position of the wiper arm and the direction of the air flow when the wiper device having the wiper lift-up prevention fins of FIG. 6 is operated.

FIG. 8 is an explanatory perspective view of the wiper device of the second conventional example, in which a middle portion of a wiper lifting prevention fin is omitted.

9 is an operation state explanatory diagram showing the relationship between the position of the wiper arm and the direction of the air flow when the wiper device having the wiper lifting prevention fins of FIG. 8 is operated.

[Explanation of symbols]

 1 wiper lifting prevention fin of wiper device 2 fin main body 2a main wind receiving surface 2c main wind receiving portion 3 fin auxiliary portion 3a auxiliary wind receiving surface 4 bent portion 4a curved surface 5 wiper arm mounting portion 11 wiper blade 12 wiper arm 14 windshield surface 15 Wiping surface I Lower reversal position J Upper reversal position

Claims (1)

[Scope of utility model registration request] 1. A wiper blade for oscillating on a windshield surface of an automobile to wipe over a wiping surface between an upper reversal position and a lower reversal position, and the wiper blade connected to each other, and the wiper blade. A wiper arm for oscillating, and a wind receiving surface that is connected to the wiper arm and receives wind pressure of an air current rising along the windshield surface,
In a wiper device having a wiper lifting prevention fin that applies a pressing force to the wiper blade to prevent the wiper blade from floating from the windshield surface, the wiper lifting prevention fin is formed in a substantially rectangular shape, A main wind receiving portion having a main wind receiving surface arranged in parallel along a blade, and a wiper arm which is continuous with the main wind receiving portion and has a width shorter than the short width of the main wind receiving portion. A fin main body formed of a mounting portion mounted on the main body, and a fin main body formed on the main wind receiving surface of the fin main body via a bent portion that is continuous with the mounting portion of the fin main body. A wiper device, comprising: a fin auxiliary portion having an auxiliary wind receiving surface that is smoothly continuous through the curved surface of the bent portion.