KR100739095B1 - Distribution pressure setting method for wiper blade, and wiper blade - Google Patents

Abstract

The present invention virtually divides the packing of the wiper blade 53 into a plurality of areas in the longitudinal direction thereof, and wipes the wiping range B of the wiper blade 53 on the glass surface 50a from the wiper blade 53. Discretizes in the direction (x direction) and in the longitudinal direction (z direction) of the wiper blade 53, and the sum of the variation difference of the contact pressure F _yij of the flat rubber at each discretized position P _ij is the smallest. The curvature is set for each virtually divided region of the packing as much as possible. By such a method of setting the distribution pressure of the wiper blade, the wiping property of the whole wiping range of the wiping surface can be easily and surely improved.

Wiper Blade, Flat Rubber, Contact Pressure, Discrete, Variable Difference, Virtual Split, Curvature

Description

DISTRIBUTION PRESSURE SETTING METHOD FOR WIPER BLADE, AND WIPER BLADE

The present invention relates to a wiper blade and a method for setting the distribution pressure of a wiper blade having a packing for distributing the pressing force from the wiper arm to the wiping surface side in the longitudinal direction of the flat rubber.

As a wiper blade for wiping raindrops or the like attached to the front glass surface of a vehicle, there is disclosed, for example, in JP-A-57-55244.

The wiper blade of this document includes one first lever connected to a wiper arm, two second levers rotatably connected to both ends of the lever, and two yokes rotatably connected to one end of the second lever, respectively. A tournament lever assembly is used. At each of the six ends of the yoke and the other end of the second lever (the end on the side where the yoke is not connected), retainers for holding the flat rubber are respectively provided. The flat rubber is equipped with a packing of approximately the same length as its longitudinal length, and the portion on which the packing is mounted is held by each holder.

In addition, the packing is formed of a metal sheet, which has a straight shape (straight shape) or a curved shape with a certain curvature in the longitudinal direction, and is elastic in the plate thickness direction. These lever assemblies and packing are configured to distribute the pressing force of the wiper arm in the longitudinal direction of the flat rubber, and to make the contact pressure to the glass surface of the rubber uniform in the longitudinal direction of the rubber.

However, the curvature of the front glass of the vehicle always changes depending on the wiping angle position of the wiper blade. And the wiper blade wiping such glass surface is required to always have good wiping property along the complicated curved glass surface.

However, in the wiper blade of this document, the load applied to each holding tool is set only at the interval of each holding tool to adjust the contact pressure in the longitudinal direction of the flat rubber to the glass surface.

The adjustment of the contact pressure often depends on the experience or feeling of a skilled technician, and the result of the adjustment is confirmed by experiments, so the wiping range of the glass surface whose curvature always changes depending on the wiping angle position is performed. It takes a lot of time to improve overall wiping. In addition, in such adjustment and setting, only the wiping property judged as a pass as a product is obtained, and the best wiping property is not necessarily obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a wiper blade distribution pressure setting method and a wiper blade which can easily and reliably improve the wiping property of the entire wiping range of the wiping surface. .

In order to achieve the above object, the distribution pressure setting method of the wiper blade according to the present invention is mounted on the flat rubber wiping the wiping surface, by distributing the pressing force from the wiper arm to the wiping surface side in the longitudinal direction of the flat rubber Applying to a wiper blade comprising a packing for equalizing the contact pressure on the wiping surface, wherein the packing is virtually divided into a plurality of regions in its longitudinal direction; Discretizing the wiping range of the wiper blade in the wiping surface in the wiping direction of the wiper blade and in the longitudinal direction of the wiper blade; At least one of the curvature and the rigidity is set for each virtually divided region of the packing so that the sum of the variation in the contact pressures at each of the discretized positions is the smallest.

When the packing is manufactured by this setting method, the sum of the fluctuations in the fluctuations in the contact pressure of the flat rubber with the packing is the smallest, so that the contact pressure is most uniform across the wiping range of the wiping surface. As a result, the wiping property of the whole wiping range of a wiper blade can be improved reliably. In addition, by using this setting method, the wiping property of the wiper blade can be easily improved by calculation without a skilled person.

In the method for setting the distribution pressure of the wiper blade, the sum of the variation in contact pressure can be calculated as the sum of the absolute values of the difference between the contact pressure and the reference value or the sum of the powers of the difference between the contact pressure and the reference value. have. This makes it possible to easily obtain the variation difference and the sum thereof without requiring complicated calculations.

In the method for setting the distribution pressure of the wiper blade, the weighting may be performed in response to the variation in the contact pressure. As a result, a portion having a large variation in contact pressure (for example, a portion in which contact pressure is largely insufficient) can be largely reflected in the curvature setting of the packing, and the wiping property of the portion can be effectively improved.

In the method for setting the distribution pressure of the wiper blade, it is preferable that the sum of the variation of the contact pressure is the sum of the reciprocation (the sum of the variation of the reciprocation) in the wiping direction of the wiper blade. Although the contact pressure of the flat rubber is slightly different in the advancing and returning operations of the wiping blade, the reciprocating sum of the fluctuations in the contact pressure makes the wiping property of the whole wiping range of the wiper blade more pleasing. It can certainly improve.

In the method for setting the distribution pressure of the wiper blade, it is preferable that the discretization of the wiping range of the wiper blade is equally spaced in the wiping direction of the wiper blade and the longitudinal direction of the wiper blade. This makes it possible to easily discretize the wiping range of the wiper blades and does not complicate the operation.

In the method for setting the distribution pressure of the wiper blade, it is preferable to make the virtual division of the packing at equal intervals in the longitudinal direction. Thereby, setting of at least one of the curvature and the rigidity for each packing area can be easily performed, and the packing can also be easily manufactured.

In addition, the wiper blade according to the present invention includes a packing manufactured on the basis of the method for setting the distribution pressure of the wiper blade, and a flat rubber to which the packing is wiped to wipe the wiping surface, the wiping arm is provided to the wiping surface side The gist is distributed so as to distribute the pressing force in the longitudinal direction of the flat rubber to equalize the contact pressure with respect to the wiping surface.

When the packing is manufactured according to the method for setting the distribution pressure of the wiper blade, the sum of the fluctuations in the fluctuations in the contact pressure of the flat rubber mounted with the packing is the smallest, so that the contact pressure is the most uniform across the wiping range of the wiping surface. The wiping property of the whole wiping range of a wiper blade can be improved reliably. In addition, by using this setting method, the wiping property of the wiper blade can be easily improved by calculation without a skilled technician.

In the wiper blade described above, the flat rubber to which the packing is mounted may be held in a lever assembly connected to the wiper arm with a plurality of levers rotatably configured in a tournament type. That is, the wiper blade is held by a lever assembly in which a flat rubber on which a packing is mounted is tournament-formed on a plurality of levers. Also in the wiper blade having such a lever assembly, the wiping property of the whole wiping range of the wiping surface can be easily and surely improved.

In the wiper blade described above, the packing mounted to the flat rubber may be configured to be directly connected to the wiper arm. Thus, even in the wiper blade of the structure in which the packing is directly connected to the wiper arm, the wiping property of the whole wiping range of the wiping surface can be easily and surely improved.

1A and 1B are views for explaining a distribution pressure setting method of the wiper blade of the embodiment;

2 is a view for explaining a distribution pressure setting method of the wiper blade of the embodiment;

3 is a view for explaining a distribution pressure setting method of the wiper blade of the embodiment;

4A and 4B are diagrams for explaining a distribution pressure setting method of the wiper blade of the embodiment;

5 is a view for explaining a distribution pressure setting method of the wiper blade of the embodiment;

6 is a view for explaining a distribution pressure setting method of the wiper blade of the embodiment;

7A and 7B are views for explaining a distribution pressure setting method of the wiper blade of the embodiment;

8 is a perspective view showing a vehicle wiper according to the embodiment;

9 is an exploded perspective view showing the wiper blade of the embodiment;

10 is a perspective view showing another example of a vehicle wiper;

11 is an exploded perspective view showing another example wiper blade;

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment which actualized this invention is described with reference to drawings.

As shown in Fig. 8, the vehicle wiper 51 for wiping fluid such as raindrops attached to the glass surface 50a of the front glass surface 50 of the vehicle includes a wiper arm 52 and a wiper blade 53. . The wiper arm 52 is fixed to a pivot shaft (not shown) whose proximal end is reciprocated at a predetermined angle with a wiper motor (not shown), and performs the reciprocating sliding movement in accordance with the reciprocating rotation of the pivot shaft. The wiper blade 53 is rotatably connected to the distal end of the wiper arm 52. In addition, the wiper arm 52 is equipped with a spring (not shown) for applying a pressing force for pressing the wiper blade 53 to the glass surface 50a.

The wiper blade 53 includes a lever assembly 54, a flat rubber 55 and a packing 56. As shown in Fig. 9, the lever assembly 54 includes one first lever 57 connected to the wiper arm 52 and two second rotatably connected to both ends of the first lever 57, respectively. The lever 58 and the two yokes 59 are rotatably connected to one end of the second lever 58, respectively. At each of six ends of the yoke 59 and the other end of the second lever 58 (the end of the side to which the yoke 59 is not connected), a holding tool 60 for holding the flat rubber 55 is provided. Is installed. In other words, the flat rubber 55 is supported at six points with respect to the lever assembly 54.

The flat rubber 55 has a base portion 55a held by the holder 50. The base portion 55a is provided along the longitudinal direction of the flat rubber 55. The base portion 55a is provided with a pair of packings 56 each having a length substantially equal to the length thereof in the mounting grooves 55b provided on both sides of the lengthwise direction. The packing 56 is made of a metal plate having elasticity and is configured to have elasticity in the plate thickness direction. The base portion 55a on which the packing 56 is mounted is held at each holder 60, and the flat rubber 55 is held relative to the lever assembly 54. The lever assembly 54 and the packing 56 distribute the pressing force of the wiper arm 52 in the longitudinal direction of the flat rubber 55, and the contact pressure of the rubber 55 with respect to the glass surface 50a is It is comprised so that it may become uniform in the longitudinal direction of the rubber 55.

On the other hand, the wiper blade 53 of the above configuration corresponds to the size of the front glass surface 50, the shape of the first lever 57, the second lever 58 and the yoke 59 and the second lever 58 and the yoke While changing the number of 59, the length of the flat rubber 55 and the packing 56 in the longitudinal direction is changed to correspond.

In the wiper blade 53 having such a configuration, in the present embodiment, the pair of packings 56 are virtually divided (n divided) into regions A1 to An equally spaced in the longitudinal direction, and the lever assembly 54 ), The virtually divided region corresponding to the curved shape of the entire wiping range of the glass surface 50a (the number of the levers 57 and 58 and the yoke 59, the interval between the holders 60, etc.) The curvature (curvature radius) is changed at each A1 to An). In the present embodiment, the packing 56 is changed in curvature in each of the plurality of regions A1 to An in the longitudinal direction to make the contact pressure with respect to the glass surface 50a of the flat rubber 55 more uniform, and thus the glass surface 50a. To improve the wiping property of the entire wiping range.

Here, the method of setting the curvature (curvature radius) of each area A1 to An of the packing 56 will be described.

First as shown in FIG. The entire wiping range B of the wiper blade 53 on the glass surface 50a of the front glass surface 50 is equally spaced in the wiping direction (x direction) of the wiper blade 53 as shown in Fig. 1B. Nx is divided at equal angle intervals), and nz is divided at equal intervals in the longitudinal direction (z direction) of the blade 53 and discretized. Coordinate data (three-dimensional position data) of each discretized position P _ij is acquired. The curved shape of the glass surface 50a can be recognized by this coordinate data.

In addition, the configuration data of the lever assembly 54 to be used (connection configuration of the first lever 57, the second lever 58 and the yoke 59, the number and spacing of the holder 60 (point)) and the wiper The blade 53 obtains the pressing force F _y received from the wiper arm 52, the bending rigidity EI of the packing 56, and the like as design conditions. With these design conditions as fixed values, only the curvature (curvature radius) of each region A1 to An of the packing 56 is used as the design variable. As an initial condition, the shape of the packing 56 is made into the straight shape (linear shape).

Next, under these design conditions, the contact pressure F _yij of the flat rubber 56 at each position P _ij is obtained. In this regard, FIG. 2 shows the contact pressure F _{yij in} the longitudinal direction of the flat rubber 55 at the predetermined position of the wiper blade 53. Then, by using [Equation 1] or [Equation 2] shown below, each position (P _ij ) is changed by changing the design variable (in this case, the design variable is the curvature of each region A1 to An) of the packing 56. The objective function f → min, i.e., defined as the sum of the variation of the contact pressures F _yij at each discretized position P _ij and changing the contact pressure F _yij of the flat rubber 55 Let the value of be the minimum value. The curvature of the regions A1 to An of the packing 56 when f → min is obtained as the most suitable curvature.

[Equation 1]

[Equation 2]

f → min, i.e., to make the value of f to the minimum means that the contact pressure F _yij of the flat rubber 55 is the most uniform throughout the wiping range B, and based on the result of the calculation By making 56 bend, the wiping property of the whole wiping range B of the wiper blade 53 reliably improves.

Here, F _y0 in each of the above formulas is a reference value, and in general, the average value or design value F _y / n _z of the contact pressure F _yij of the flat rubber 55 (the wiper blade 53 is the wiper arm 52). Value obtained by dividing the pressing force F _y received from the divided water nz in the longitudinal direction (z direction) of the blade 53). And [Formula 1], it is a value integrating the absolute value of a difference between the contact pressure (F _yij) and constant (F _y0) in the syntax of the respective dioxide position (P _ij). In Equation 2, a value obtained by integrating a value obtained by multiplying the difference between the contact pressure F _yij and the constant F _y0 at each discretized position P _ij is obtained.

In this regard, w (F _yij ) is a weight function, and usually w (F _yij ) = 1, but may be changed in some cases. For example, as shown in Fig. 3, when the contact pressure F _yij of the flat rubber 55 becomes less than or equal to the predetermined value C, the contact pressure F _yij becomes smaller and the weight function w ( F _yij ) can be set to a number greater than one. In this way, part of insufficient contact pressure (F _yij) of the flat rubber 55 part because to be greatly reflected in the curvature setting of the packing 56, the lack of contact pressure (F _yij) of the rubber (55) Can be effectively improved.

In addition, although the curvature setting in each area | region A1-An of such packing 56 is not shown in this embodiment, it implements using a computer. In other words, the computer includes arithmetic software such as [Equation 1] or [Equation 2], and the curvature of each area A1 to An of the packing 56 is obtained by inputting the above conditions with a keyboard or the like. To be made.

Next, the wiper blades 53a and 53b shown in Figs. 4A and 4B will be described in detail. The lever assembly 54 used for these wiper blades 53a and 53b is composed of one first lever 57 and two second levers 58, respectively. Four so-called end assemblies of the second lever 58 are so-called four-point support lever assemblies 54 in which a holder 60 for holding the flat rubber 55 with the packings 56a and 56b is provided. .

Further, the length L in the longitudinal direction of the wiper blades 53a and 53b, that is, the flat rubber 55 and the packing 56 is set to 550 [mm], and the lever assembly 54 shown in FIG. 60) is 170 [mm]. That is, the protruding length of the flat rubber 55 which protrudes from the holder 60 of both ends is set to 20 [mm]. On the other hand, the lever assembly 54 shown in FIG. 4B is 100 [mm] between each holding tool 60. As shown in FIG. In other words, the protruding length of the flat rubber 55 protruding from the holder 60 at both ends is 125 [mm].

As shown in Fig. 5, the bending stiffness EI of the packing 56 is 4.4 × 10 ⁻² [Nm ² ], and the pressing force F _y from the wiper arm applied to the wiper blades 53a and 53b is 9.2. [N], the number n of divided regions n in the longitudinal direction of the packing 56 is virtually divided into 11 regions A1 to A11 at intervals of 11, that is, 50 [mm].

Further, the dividing number nx in the longitudinal direction (z direction) of the wiper blades 53A and 53B is 110, that is, 5 [mm] intervals, and the dividing number in the wiping direction (x direction) of the blades 53a and 53b. (nz) is 172. Since the wiping ranges of the wiper blades 53a and 53b are in the range of 86 °, and the wiping blades 53a and 53b are reciprocating for each sliding angle of 1 °, the dividing water nz is 86. X 2 = 172. And the coordinate data (three-dimensional position data) of each position P _ij discretized in this way is obtained.

Based on these data, the flatness of each position _Pij is changed by changing the curvature (curvature radius) of each area A1 to A11 of the packing 56 using the above Equation 1 or Equation 2. The contact pressure F _yij of the rubber 55 is changed so that the value of f → min, i.e., f, is minimized.

As a result, in the wiper blade 53a of Fig. 4A, the curvature of the regions A1 to A11 of the packing 56a when f → min becomes as shown in Fig. 6. That is, the curvature in each region A1-A11 of the packing 56a is sequentially from the rear end of the wiper blade 53a toward the tip (sequentially from the right side to the left side in FIG. 1), and is straight (absolute value) in the region A1. 10000 [mm] or more is regarded as a straight line), 1022.41 [mm] in the area A2, and -8000.84 [mm] in the area A11. In this case, if the curvature is a positive number, the packing 56a is bent to protrude toward the glass surface 50a, and if the curvature is a negative number, the packing 56a is protruded to the opposite side to the glass surface 50a. Curve

Therefore, this packing 56a is curved so as to protrude toward the glass surface 50a as a whole as shown in Fig. 7A, and the sum of the degree of curvature of the center portion is larger than both ends. Then, the packing 56a is bent and manufactured on the basis of the result of the calculation, so that the wiping property of the entire wiping range B of the wiper blade 53a of this configuration is reliably improved.

Moreover, in the wiper blade 53b of FIG. 4B, the curvature (curvature radius) in each area | region A1-A11 of the packing 56b when f → min becomes sequential from the rear end of the wiper blade 53b toward the front-end | tip. Thus, the area A1 is -2189.41 [mm], the area A2 is -839.23 [mm], ..., and the area A12 is -2230.43 [mm].

Therefore, this packing 56b is curved so as to protrude toward the opposite side of the glass surface 50a as a whole as shown in Fig. 7B, and the sum of the curvatures of the center portion is larger than both ends. Then, the packing 56b is bent and manufactured on the basis of the result of the calculation, so that the wiping property of the entire wiping range B of the wiper blade 53b of this configuration is reliably improved.

Next, the characteristic effect of this embodiment is demonstrated.

(1) In the present embodiment, the packing 56 (56a, 56b) is first virtually divided into a plurality of areas A1 to An (A1 to A11) in the longitudinal direction thereof. Next, the wiping range B of the wiper blades 53 (53a, 53b) on the glass surface 50a, which is the wiping surface, is determined by the wiping direction (x direction) of the wiper blades 53 (53a, 53b) and the above. Discretizes in the longitudinal direction (z direction) of the wiper blades 53 (53a, 53b). Next, the sum of the variation of the contact pressure F _yij of the flat rubber 55 at each discretized position P _ij (in this embodiment, the difference between the difference between the contact pressure F _yij and the reference value F _y0 ). The virtually divided areas A1 to An of the packings 56 (56a and 56b) such that the sum of absolute values or the sum of the squared difference between the contact pressure F _yij and the reference value F _y0 is the smallest. The curvature is set at each of (A1 to A11). Accordingly, when the packings 56 (56a and 56b) are manufactured in accordance with this setting method, the sum of the variations in the contact pressures F _yij of the flat rubber 55 to which the packings 56 (56a and 56b) are mounted. Is the smallest and the contact pressure F _yij is the most uniform in the entire wiping range B, so that the wiping property of the whole wiping range B of the wiper blades 53 (53a, 53b) can be reliably improved. Can be. In addition, when using this setting method, the wiping property of the wiper blades 53 (53A, 53B) can be easily improved by calculation without an expert.

(2) In this embodiment, only the curvature setting for each area | region A1-An (A1-A11) of the packing 56 (56a, 56b) is performed, and the wiper of the wiper blades 53 (53a, 53b) is carried out. Since the wiping property of the whole wiping range B can be improved, even if the structure of the lever assembly 54 is slightly changed, the wiping property of the whole wiping range B can be improved. In other words, the degree of freedom in configuration of the lever assembly 54 can be improved. For this reason, in some cases, the number of uses of the 2nd lever 58 and the yoke 59 which are the component parts of the lever assembly 54 can be reduced, and the number of parts of the lever assembly 54 can be reduced. Can be.

(3) the sum (the formula 1) or the contact pressure of the absolute value of the difference variable the sum of the difference is a contact pressure (F _yij) and the reference value (F _y0) of the contact pressure (F _yij) in this embodiment (F _yij) The sum of the power of the difference between the reference value F _y0 and the power of 2 is assumed to be the sum (Expression 2 above). This makes it possible to easily obtain the variation difference and the sum thereof without requiring complicated calculations.

(4) [Equation 1] and [Equation 2] have a weight function w (F _yij ) which gives weight to the contact pressure F _yij . In the accordance with the contact pressure (F _yij) enabling you to the weight given to the, difference variation in the contact pressure (F _yij), large portions (e.g., parts, etc. largely insufficient) greatly reflected in the curvature setting of the packing 56 And the wiping property of the part can be improved effectively.

(5) In this embodiment, the sum total of the fluctuation difference of the contact pressure F _yij is the sum total of the reciprocation of the wiper blades 53 (53a, 53b) in the wiping direction. In the advancing and returning operations of the wiping blades of the wiper blades 53 (53a, 53b), the contact angle (attach angle) of the flat rubber 55 to the glass surface 50a is determined. Due to the other, the contact pressure F _yij of the flat rubber 55 is slightly different. Therefore, when the sum total of the fluctuation difference of the contact pressure F _yij is made into reciprocation, the wiping property of the whole wiping range B of the wiper blade 53 (53a, 53b) can be improved more reliably.

(6) In this embodiment, the discretization of the wiping range B of the wiper blades 53 (53a, 53b) is equally spaced in the wiping direction of the wiper blades 53 (53a, 53b) and in the longitudinal direction of the wiper blades. Becomes Therefore, its discretization can be easily executed, and the operation is not complicated.

(7) In this embodiment, the virtual divisions of the packings 56 (56a, 56b) are equally spaced in the longitudinal direction. As a result, the curvature setting for each of the regions A1 to An (A1 to A11) of the packings 56 (56a and 56b) can be easily performed, and the packings 56 (56a and 56b) can be easily manufactured. Can be.

In addition, embodiment of this invention can be changed as follows.

In the above embodiment, the wiper blades 53 (53a, 53b) configured by using the tournament type lever assembly 54 have been described, but the configuration of the lever assembly 54, for example, the second lever 58, is described. The number and shape of the yoke 59 is not limited to this, and may be appropriately changed. It may also be a wiper blade 62 as shown in Figs. 10 and 11 constructed without using the lever assembly 54.

The vehicle wiper 61 of the type shown in FIG. 10 and FIG. 11 consists of a wiper arm 52 and a wiper blade 52. The wiper blade 62 includes a packing 63 having a bifurcated shape approximately equal to the length of the flat rubber 55. The packing 63 is made of a metal plate having elasticity and is configured to have elasticity in the plate thickness direction. The bifurcated packing 63 is inserted into the mounting groove 55b of the flat rubber 55 from the longitudinal direction and mounted. In the longitudinal center portion of the packing 63, a connecting portion 63a for directly connecting with the wiper arm 52 (without using the lever assembly 54) is integrally formed or integrally assembled. In the packing 63 near the connecting portion 63a, a resin center cap 64 covering the circumference of the connecting portion 63a is mounted. In addition, rubber caps 65 are mounted on both sides of the central cap 64, respectively, on the side of the flat rubber 55 opposite to the packing 63. The rubber cap 65 extends to the end of the packing 63, and the rubber cap 65 is integrally formed with a pin 65 that prevents the wiper blade 62 from rising from the glass surface 50a. Resin end caps 66 are mounted on both ends of the rubber cap 65 and the packing 63. Also in the wiper blade 62 of such a structure, the setting method which sets the curvature (curvature radius) with respect to the packing 63 for every area | region A1-An similarly to the said embodiment is applicable. In addition, the structure of the wiper blade 62 is not limited to this, It can also change suitably.

The sum of the variation difference of the contact pressure (F _yij) in the embodiment is difference in contact pressure (F _yij) and the reference value (F _y0) total or contact pressure of the absolute value of the difference (F _yij) and the reference value (F _y0) Is taken as the sum of squared values, but in addition to this, the sum of the variation in contact pressure F _yij can also be obtained.

In the said embodiment, although the sum total of the fluctuation difference of the contact pressure F _yij was made into the sum total of the reciprocation of the wiper blades 53 (53a, 53b) in the wiping direction. It is good also as a sum total of either operation | movement operation or a return operation | movement.

In the above embodiment, the discretization of the wiping range B of the wiper blades 53 (53a, 53b) is equally spaced in the wiping direction of the wiper blades 53 (53A, 53B) and the longitudinal direction of the wiper blade. At least one of the wiping direction and the longitudinal direction may be spaced apart from each other.

Although the virtual division of the packings 56 (56a, 56b) was made at equal intervals in the longitudinal direction in the said embodiment, they may be made into the same space | interval.

In the above embodiment, a pair of packings 56 are used, but may be integrally formed.

In the said embodiment, although the vehicle wiper 51 which wiped the glass surface 50a of the front glass surface 50 was demonstrated, it may be other than a vehicle. Moreover, the wiper which wipes wiping surfaces other than the glass surface 50a may be sufficient.

As described above, according to the present invention, it is possible to provide a method for setting a distribution pressure of a wiper blade and a wiper blade which can easily and reliably improve the wiping property of the entire wiping range of the wiping surface.

Claims (9)

A wiper blade mounted on a flat rubber wiping a wiping surface, the packing including a packing for equalizing the contact pressure with respect to the wiping surface by distributing the pressing force from the wiper arm to the wiping surface side in the longitudinal direction of the flat rubber; As a distribution pressure setting method, Virtually dividing the packing into a plurality of regions in its longitudinal direction; Discretizing the wiping range of the wiper blade in the wiping surface in the wiping direction of the wiper blade and in the longitudinal direction of the wiper blade; Wherein at least one of curvature and rigidity is set for each virtually divided region of the packing so that the sum of the variation in the contact pressures at each of the discretized positions is the smallest. Distribution pressure setting method of wiper blade. The method of claim 1, The sum of the variation of the contact pressure is the sum of the absolute value of the difference between the contact pressure and the reference value or the sum of the powers of the difference between the contact pressure and the reference value. Distribution pressure setting method of wiper blade. The method of claim 1, Weighting is performed in response to the variation in the contact pressure. Distribution pressure setting method of wiper blade. The method of claim 1, The sum of the variation in the contact pressures is the sum of the reciprocating portion in the wiping direction of the wiper blade. Distribution pressure setting method of wiper blade. The method of claim 1, Discretization of the wiping range of the wiper blade is characterized by equal intervals in the wiping direction of the wiper blade and the longitudinal direction of the wiper blade. Distribution pressure setting method of wiper blade. The method of claim 1, Characterized in that the virtual division of the packing at equal intervals in the longitudinal direction Distribution pressure setting method of wiper blade. Claims 1 to 6 including a packing manufactured based on the method for setting the distribution pressure of the wiper blades, and the flat rubber is mounted to the wiping surface is mounted, And distribute the pressing force from the wiper arm toward the wiping surface in the longitudinal direction of the flat rubber to equalize the contact pressure on the wiping surface. wiper blade. The method of claim 7, wherein The flat rubber to which the packing is mounted is held in a lever assembly connected to the wiper arm in which a plurality of levers are rotatably configured in a tournament type. wiper blade. The method of claim 7, wherein The packing mounted to the flat rubber is configured to be directly connected to the wiper arm. wiper blade.

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