JPH0640046Y2 - Wiper device - Google Patents

Description

[Detailed description of the device] [The purpose of the device]

(Industrial field of application) The present invention relates to a wiper device for wiping a windshield surface of an automobile, and particularly, when the wiper blade is located between a lower reversal position and an upper reversal position of the wiper device, the wiper blade moves forward when traveling. The present invention relates to a wiper device including a wiper lift-up prevention fin that prevents the wiper blade from rising from the windshield surface when receiving wind pressure from the windshield surface. (Prior Art) A first conventional example of a conventional wiper device will be described with reference to FIGS. 4 and 5, and a second conventional example will be described with reference to FIGS. 6 and 7. The wiper lifting prevention fin 101 of the wiper device according to the first conventional example illustrated in FIG. 4 includes a fin body portion 102 having a flat plate-shaped wind receiving surface 102a and a back side of the wind receiving surface 102a of the fin body portion 102. In addition, the fin body 102 is configured with a wiper arm attachment portion 103 integrally provided on one end side thereof. The wiper arm mounting portion 103 is provided with wiper arm mounting holes 103a and 103b. The wiper lifting prevention fin 101 having such a configuration
5, in a blade assembly 110 of a wiper device in which a wiper blade 111 and a wiper arm 112 are connected, along a wiper blade 111 and in the vicinity of a connecting portion 113 between the wiper blade 111 and the wiper arm 112. It is attached to the wiper arm 112 of. 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 for good visibility. Then, the wiper lifting prevention fin 101 provided on the wiper arm 112 shown by the phantom line is used for the blade assembly 1
At the lower reversal position of 10, the airflow rising along the windshield surface 114 prevents the wiper lifting prevention fin 101.
In the case of the arrow γ direction with respect to, since the wind direction of the air flow is nearly perpendicular to the longitudinal direction of the wind receiving surface 102a of the wiper lifting prevention fin 101,
The wind receiving surface 102a receives a wind pressure to apply a sufficient pressing force to the wiper blade 111 via the wiper arm 112, and the windshield surface 114 is pressed against the wiper blade 111 so as not to float. Next, the wiper lift-up prevention fin 121 of the wiper device in the second conventional example illustrated in FIG. 6 has a fin body portion 122 formed by bending a flat plate into a dogleg shape, and a dent side of the fin body portion 122. As a wind receiving surface 122a and a wiper arm mounting portion 123 integrally provided on the back side of the wind receiving surface 122a and also on one end side of the fin body 122. The wind receiving surface 122 is attached to the wiper arm mounting portion 123.
Wiper arm mounting portions 123a and 123b are provided so as to be inclined with respect to a. The wiper lifting prevention fin 121 having such a configuration
As shown in FIG. 7, in a blade assembly 130 of a wiper device in which a wiper blade 131 and a wiper arm 132 are connected to each other, a wiper blade 131 and a wiper arm 132 are provided along the wiper blade 131 and the wiper arm 132. It is attached to the wiper arm 132 near the connecting portion 133. 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 the windshield surface 134 to wash the wiping surface 135 for good visibility. Then, the wiper lifting prevention fin 121 provided on the wiper arm 132 shown in phantom is in the lower reversal position,
When the air flow rising along the windshield surface 134 is in the direction of the arrow ε with respect to the wiper floating prevention fin 121, it is close to a right angle to the longitudinal direction of the wind receiving surface 122a of the wiper floating prevention fin 121. Since wind pressure is applied from the direction, a sufficient pressing force is applied to the wiper blade 131 via the wiper arm 132, and the windshield surface 134
The wiper blade 131 is pressed against and prevents it from rising. (Problems to be solved by the invention) 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. When the airflow rising along the windshield surface 114 is in the direction of the arrow δ with respect to the wiper floating prevention fin 101, the airflow is oblique with respect to the longitudinal direction of the wind receiving surface 102a of the wiper floating prevention fin 101. Direction, the wind receiving surface 102a cannot receive a desired wind pressure. Therefore, the force of 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 rise. 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 windshield surface is
When the airflow rising along 134 is in the arrow ζ direction with respect to the wiper floating prevention fin 121, the airflow is oblique with respect to the longitudinal direction of the wind receiving surface 122a of the wiper floating prevention fin 121. So the wind receiving surface
122a cannot receive the desired wind pressure. for that reason,
There is a problem in that the force for pressing the wiper blade 131 against the windshield surface 134 via the wiper arm 132 becomes insufficient and the wiper blade 131 may rise. Thus, the wiper lifting fin 10 as described above.
In the wiper device having 1,121, when the wind pressure is applied from the lower reversal position and the upper reversal position of the wiper arm, particularly in the intermediate position in the direction along the windshield surfaces 114,134 and from the downward direction, the respective wiper blades 111,131 are respectively disposed. There is a problem that the wiper blade 111, 131 may be lifted from the windshield surface 114, 134 because the force pressing against the windshield surface 114, 134 is insufficient, so that a good wiping surface 115, 135 may not be obtained. It was (Object of the Invention) The present invention was made in view of such conventional problems, 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. When wind pressure is received from the front while the car is running,
It is an object of the present invention to provide a wiper device that can prevent the wiper blade from floating and can obtain a good wiping surface.

[Constitution of device]

(Means for Solving the Problem) 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. A wiper arm that is connected to the wiper blade and that swings the wiper blade; and a wind receiving surface that is connected to the wiper arm and that receives wind pressure of an air stream rising along the windshield surface. In the wiper device provided with a wiper lifting prevention fin for preventing the wiper blade from being lifted from the windshield surface by applying a pressing force to the wiper lifting prevention fin, the wiper lifting prevention fin is formed in a substantially rectangular shape and extends along the wiper blade. Are arranged in parallel and the main wind receiving surface with the short width direction curved to the windshield surface side And a main wind receiving portion having a short width that is continuous with the main wind receiving portion and is shorter than the short width of the main wind receiving portion. A plurality of tubular bodies formed with the tubular body, the fin body including an attachment portion attached to the wiper arm by the tubular body, and a bent portion that is continuous with the attachment portion of the fin body portion. A fin auxiliary portion that is formed to extend in the direction of the wiper blade and that has a fin auxiliary portion that has an auxiliary wind receiving surface that is smoothly continuous to the main wind receiving surface of the main wind receiving portion via the curved surface of the bent portion. It is characterized in that the configuration of such a wiper device is used as means for solving the above-mentioned conventional problems. (Operation) In the wiper device having such a configuration, the windshield wiper blade swings the windshield surface 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 receiving the wind pressure of the air flow from the front of the shield along the windshield surface to the bottom to the top, when the wiper blade is in the middle between the lower reversal position and the upper reversal position, the main wind in the fin body of the wiper lift-up prevention fin The longitudinal direction of the main wind receiving surface of the receiving part is a direction of about 45 ° with respect to the direction of wind pressure.
Therefore, the pressing force to the windshield side generated 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 wind pressure received by the auxiliary wind receiving surface of the fin auxiliary portion located at the end of the fin main body on the wiper arm pivot side is formed by the fin auxiliary portion extending from the fin main body in the wiper blade direction. Therefore, the fin auxiliary portion is in a state close to a right angle with respect to the longitudinal direction. Therefore, the pressing force on the windshield surface, 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 an intermediate position between the lower reversal position and the upper reversal position of the windshield surface and the windshield wiper blade receives wind pressure due to the airflow rising along the windshield surface, A desired pressing force is obtained by the auxiliary wind receiving surface. Therefore, the wiper blade is pressed against the windshield surface and is prevented 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 wind pressure direction change every moment, but the fin main body portion Since the main wind receiving surface of the fin and the auxiliary wind receiving surface of the fin auxiliary portion are smoothly continuous through the curved surface of the bending portion continuous to the mounting portion, one of the fin main body portion, the bending portion, and the fin auxiliary portion is Thus, the wind pressure is applied to almost the front part of the portion, and the wiper blade is pressed against the windshield surface without interruption. (Embodiment) An embodiment of a wiper device according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 (a) to (m) and FIGS. 2 (a) and (b), the wiper lift-up prevention fin 1 of this wiper device has the highest wind pressure near the lower reversal position I shown in FIG. The fin main body 2 receives a large amount, and the wiper arm 12 shown in FIG. 3 also includes a fin auxiliary part 3 that receives the largest wind pressure near the intermediate position H between the lower inverted position I and the upper inverted position J. The fin body 2 is formed in a generally rectangular shape as a whole, and has a main wind receiving surface 2a whose side is curved in the widthwise direction toward the windshield surface 14 and the main wind receiving surface 2a Main wind receiving portion 2c having a ridge portion 2b on the back side, and the main wind receiving portion
The width of the main wind receiving surface 2a is shorter than the width of 2c.
And a wiper arm attachment portion 5 having a wind receiving surface 2d which is smoothly continuous and has a radius of curvature smaller than that of the main wind receiving surface 2a and whose short width direction is curved toward the windshield surface 14 side. The wiper arm mounting portion 5 includes a plurality of tubular bodies 6a and 6b, and ribs 7a for integrally supporting and fixing the tubular bodies 6a and 6b on the back side of the wind receiving surface 2d continuous with the main wind receiving surface 2a. 7b, and through holes 8a, 8b are provided in the respective axial centers of the cylindrical bodies 6a, 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 5 has an auxiliary wind-receiving surface 3a which is a flat surface that smoothly continues through the curved surface 4a of the bent portion 4. Such a wiper lifting prevention fin 1 has a structure as shown in FIG. In a blade assembly 10 formed by connecting a wiper blade 11 and a wiper arm 12, the wiper blade 11 and the wiper arm are parallel to the wiper blade 11.
It is attached to the wiper arm 12 near 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 phantom lines in FIG. 3, 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 extends along the windshield surface 14. When the wind direction of the rising airflow is in the direction of the arrow α, the wind receiving surface 2 of the fin body 2 of the wiper lifting prevention fin 1
The wind direction is close to a right angle with respect to the longitudinal directions of a and 2d. Therefore, the wind receiving surfaces 2a, 2d of the fin main body 2 receive a larger wind pressure and apply a pressing force to the wiper blade 11 via the wiper palm 12, so that the wiper blade
11 is pressed against the windshield surface 14 and is prevented from rising. On the other hand, as indicated by the solid line in FIG. 3, the wiper blade 11 is located near the middle position H between the lower reversal position I and the upper reversal position J of the windshield surface 14, and rises along the windshield surface 14. When the wind direction of the flowing air is in the direction of arrow β, the wiper lifting prevention fin 1
Since the airflow is oblique to the longitudinal direction of the wind receiving surfaces 2a, 2d of the fin body 2 at an angle of 45 ° or an angle close to 45 °, the wind pressure received by the 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 3a is formed. A larger wind pressure is applied in a state of being close to a right angle to the longitudinal direction of the portion 3. 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 at the intermediate position H,
Although the pressing force of the wind receiving surfaces 2a and 2d of the fin main body 2 due to the wind pressure decreases, the pressing force of the wind receiving surface 3a of the fin auxiliary portion 3 due to the wind pressure increases, so that the wiper floating prevention fin 1 The pressing force due to the wind pressure received as a whole is that the windshield surface of the wiper blade 11 is
Sufficient pressure to hold onto 14. When the wiper blade 11 oscillates on the windshield surface 14 and receives wind from the front when the vehicle is running, the fin body 2 and the fin auxiliary 3 are oriented in different directions with respect to the direction of wind pressure. The main wind receiving surface of the fin body 2
2a and the auxiliary wind receiving surface 3a of the fin auxiliary portion 3 are smoothly continuous via the curved surface 4a of the bending portion 4 continuous to the wiper arm mounting portion 5, so that the fin main body portion 2, the bending portion 4
And, any part of the fin auxiliary portion 3 receives the wind pressure from almost the front, and the wiper blade 11 is pressed against the windshield surface 14 without interruption, and the floating is prevented.

[Effect of device]

As described above, since the wiper device according to the present invention has the above-mentioned configuration, it is of course not necessary when the wiper blade is in the lower reversal position or the upper reversal position of the windshield surface during traveling of the automobile. In particular, even when the wiper blade is passing through the intermediate position between the two reversing positions while receiving wind pressure from the front, it is possible to prevent the wiper blade from rising from the windshield surface, Sometimes, the excellent effect that the wiping surface on the windshield surface can always be satisfactorily wiped is brought about.

[Brief description of drawings]

FIG. 1 (a) is a front view illustrating a wiper lifting prevention fin according to an embodiment of a wiper device according to the present invention,
1 (b) is a plan view of the front view shown in FIG. 1 (a), FIG. 1 (c) is a left side view of the front view shown in FIG. 1 (a), and FIG. 1 (d). Is a partially omitted bottom view with respect to the front view shown in FIG. 1 (a), FIG. 1 (e) is a sectional view taken along line ee in FIG. 1 (b), and FIG. 1 (f) is FIG. 1B is a cross-sectional view taken along line f-f in FIG. 1B, FIG. 1G is a cross-sectional view taken along line g-g in FIG. 1D, and FIG. 1H is in FIG. 1D. Hh line portion abbreviated sectional view, FIG. 1 (i)
1 (c) is a view from the direction of the arrow i in which the intermediate portion is omitted, and FIG. 1 (j) is a right side view of the fin assisting portion in FIG. 1 (i). ) Is a sectional view in which both ends of the kk line in FIG. 1 (i) are omitted, and FIG. 1 (l) is a cross-sectional view of FIG. 1 (i).
The both ends abbreviated arrow view seen from the direction, FIG.
FIG. 2 (a) is a sectional view of one end portion of the MM line in FIG.
FIG. 3B is a perspective view of the wiper lifting prevention fin shown in FIG. 1 with an intermediate portion omitted, and FIG. 3 is the position of the wiper arm to which the wiper lifting prevention fin of FIG. And FIG. 4 is a perspective view of the first prior art example of the wiper lifting prevention fin of the wiper device in the first prior art, in which the intermediate portion is omitted, and FIG. 5 is a perspective view of the wiper device in operation. Explanatory drawing showing the relationship between the position of the wiper arm attached with the anti-lifting fin and the direction of the air flow, FIG.
FIG. 7 is a partially fragmented perspective view of the wiper lifting prevention fin of the conventional wiper device, omitting the intermediate portion, and FIG. 7 shows the position of the wiper arm to which the wiper lifting prevention fin of FIG. It is explanatory drawing which shows the relationship. 1 ... Wiper lifting prevention fin of wiper device, 2 ... Fin body part, 2a ... Main wind receiving surface, 2c ... Main wind receiving part 3 ... Fin auxiliary part, 3a ... Auxiliary wind receiving surface, 4 ... Bent part, 4a ... Curved surface , 5 ... Wiper arm mounting portion, 6a, 6b ... Cylindrical body, 8a, 8b ... Through hole, 11 ... Wiper blade, 12 ... Wiper arm, 14 ... Windshield surface, 15 ... Wiping surface, I ... Lower inverted position, J ... Top inverted 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; 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 provided with 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 that is arranged in parallel along the blade and has a main wind receiving surface that is curved in the short width direction to the windshield surface side, and a short width of the main wind receiving portion that is continuous with the main wind receiving portion. And a plurality of cylindrical bodies each having a shorter width than that of the main wind receiving surface and having a through hole formed in the center portion on the back side of the main wind receiving surface, and attached to the wiper arm by the cylindrical bodies. A fin body formed of a mounting portion and a bent portion that is continuous with the mounting portion of the fin body portion and is formed to extend in the wiper blade direction. Wiper apparatus characterized by and a fin auxiliary section having an auxiliary wind receiving surface smoothly continuous through the curved surface of the bent portion to the main wind receiving surface of the main wind receiving portion.