JP2012020625A - Wiper of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a wiper of an automobile having a small number of part items and capable of increasing the wiping area of a glass surface.SOLUTION: The wiper 1 has a crank 5 having a base end side rotatably supported with respect to a vehicle body, an electric motor 3 which rotates and drives the crank 5, a wiper arm 9 coupled to the distal end side of the crank 5 so as to be relatively rotatable, a wiper blade 10 attached to the wiper arm 9, and a slider 13 rotatable with respect to the vehicle body, supported at a fixed position with respect to the vehicle body, and fitting the wiper arm 9 so as to be slidable in the longitudinal direction thereof. The crank 5 is rotated by actuation of the electric arm 3. Along with the rotation, the slider 13 slides with respect to the wiper arm 9, and the wiper arm 9 swings together with the wiper blade 10. Because of the swing of the wiper blade 10, the wiper blade 10 wipes off the rain droplets adhering on the glass surface while sliding in contact with the glass surface.

Description

  The present invention relates to an automobile wiper that wipes raindrops adhering to a glass surface.

  In order to secure the driver's field of view, it is conventionally known to provide a wiper that wipes raindrops adhering to a glass surface such as a windshield glass, a rear window glass, a side window glass, or a mirror (see Patent Document 1). A wiper that wipes the glass surface of the headlamp lens in order to prevent a decrease in illuminance is also known.

  FIG. 5 is a schematic front view showing an example of a conventional wiper for windshield glass, in which a hood is not shown (the same applies to FIG. 6). The wiper 1A shown here has a wiper arm 9A whose base end is fixedly connected to the drive shaft 21A, and a wiper blade 10A attached to the wiper arm 9A. The drive shaft 21A is driven by an electric motor (not shown). By being reciprocally rotated within a predetermined angular range, the wiper arm 9A and the wiper blade 10A swing between an initial position indicated by a solid line and an end position indicated by a two-dot chain line, as indicated by arrows. Accordingly, the raindrops attached to the glass surface can be wiped off while the wiper blade 10A is in sliding contact with the glass surface of the windshield glass 14A.

  Since the wiper 1A described above has one wiper arm 9A, the number of parts is small and the entire structure can be simplified. However, according to the wiper 1A, the area of the glass surface hatched in FIG. 5 and indicated by the reference symbol G cannot be wiped by the wiper blade 10A, and the driver cannot secure a sufficient field of view. I can't escape.

  Accordingly, a wiper having a wiper arm constituted by a four-barrel rotating chain is also known, and an example thereof is shown in FIG. In the wiper 1B shown here, a main arm 18B having a base end portion fixed to a drive shaft 21B rotatably supported by the vehicle body, and the base end portion can rotate with respect to the vehicle body via a pin 22B. The wiper arm 9B is constituted by a sub arm 19B supported by the intermediate arm 20B and an intermediate arm 20B called a swivel connected to the main arm 18B and the sub arm 19B through pins 23B and 24B so as to be relatively rotatable. A wiper blade 10B is attached. The main arm 18B, the sub-arm 19B, the intermediate arm 20B, and the vehicle body form a four-node rotating chain.

  The drive shaft 21B is reciprocally rotated within a predetermined angle range by an electric motor (not shown), whereby the wiper arm 9B composed of the three arms 18B, 19B, and 20B and the wiper blade 10B described above are shown in FIG. As indicated by the arrow, it swings between the initial position indicated by the solid line and the end position indicated by the two-dot chain line. Thereby, the wiper blade 10B wipes the raindrops adhering to the glass surface while slidingly contacting the glass surface of the windshield glass 14B.

  Here, when the wiper arm 9B and the wiper blade 10B are in the initial positions indicated by solid lines, the angle formed by the wiper blade 10B and the main arm 18B is α, and the wiper arm 9B and the wiper blade 10B are indicated by two-dot chain lines. When the angle between the wiper blade 10B and the main arm 18B is β when in the position, each arm 18B, 19B, 20B and the vehicle body form a four-node rotation chain. β becomes larger (β> α). For this reason, the wiper blade 10B can wipe away the region G of the glass surface shown in FIG. Thus, when the length of the wiper blade 10A of the wiper 1A shown in FIG. 5 is equal to the length of the wiper blade 10B of the wiper 1B shown in FIG. 6, the wiper 1B shown in FIG. Since the wiping area with respect to the glass surface can be increased, the driver can secure a sufficient field of view.

  However, in the wiper 1B shown in FIG. 6, since the wiper arm 9B is composed of the three arms of the main arm 18B, the sub arm 19B, and the intermediate arm 20B, the number of parts increases and the structure of the wiper 1B becomes complicated. , Its cost will rise.

JP 10-501001 gazette

  The object of the present invention is to increase the wiping area with respect to the glass surface in comparison with the conventional wiper shown in FIG. 5 when the lengths of the wiper blades are equal, and more parts than the wiper shown in FIG. The object is to provide a wiper for an automobile that can reduce the amount of electricity.

  In order to achieve the above object, the present invention is connected to a crank whose base end side is rotatably supported with respect to the vehicle body, an electric motor that rotationally drives the crank, and a crank end that is relatively rotatable. A wiper arm, a wiper blade attached to the wiper arm, and rotatable relative to the vehicle body, but supported so as not to move relative to the vehicle body, and fitted to the wiper arm so as to be slidable in the longitudinal direction. The crank is rotated by the operation of the electric arm, and the wiper arm swings together with the wiper blade while the slider slides relative to the wiper arm as the rotation of the electric arm. When the wiper blade slides against the glass surface due to the swinging of the blade, the wiper of the automobile wipes away the raindrops adhering to the glass surface. Suggest.

  According to the present invention, since the number of wiper arms is one, the number of parts of the wiper can be reduced, and the structure thereof can be simplified. In addition, the wiper blade moves when the wiper blade rotates from the initial position to the end position while sliding on the glass surface. Conversely, the wiper blade moves when the wiper blade rotates from the end position to the initial position. Since the movement trajectory of the blade is different, when the wiper blade reciprocally swings, the area where the wiper blade wipes the glass surface is enlarged, and the driver can secure a sufficient field of view.

It is a disassembled perspective view of the wiper concerning the present invention. FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG. 1 in a state where the components of the wiper shown in FIG. 1 are assembled. It is the III-III sectional view taken on the line of FIG. It is the schematic explanatory drawing which clarified operation | movement of the wiper shown in FIG. 1, Comprising: It is the figure which abbreviate | omitted the hood of the motor vehicle. It is a schematic explanatory drawing which shows operation | movement of the conventional wiper, Comprising: It is the figure which abbreviate | omitted the hood of the motor vehicle. It is a schematic explanatory drawing which shows operation | movement of the other conventional wiper, Comprising: It is the figure which abbreviate | omitted the food | hood of the motor vehicle.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  As shown in FIG. 1, the wiper 1 of the automobile of this example has a motor holder 2 fixed to a vehicle body (not shown), that is, a main body of the automobile by bolts and nuts (not shown). The electric motor 3 is fixedly supported. Thus, although the electric motor 3 of this example is fixedly supported on the vehicle body via the motor holder 2, the electric motor 3 can also be fixedly supported on the vehicle body directly.

  The base end side of the crank 5 is fixed to the output shaft 4 of the electric motor 3. The crank 5 is rotatably supported on the vehicle body via the electric motor 3 and the motor holder 2 at the base end side. The crank 5 is rotationally driven in the direction indicated by the arrow A in FIG.

  As described above, the wiper 1 of the present example includes the crank 5 whose base end side is rotatably supported with respect to the vehicle body, and the electric motor 3 that rotationally drives the crank 5.

  Further, as shown in FIG. 2, the base end portion of the first ball joint 6 is fixed to the tip end side of the crank 5, and the connecting member 8 is connected to the ball portion 7 at the tip end of the first ball joint 6. It is fitted so that it can rotate. As clearly shown in FIG. 2, the connecting member 8 is fixed to the base end portion of the wiper arm 9 so as not to be relatively movable. Thus, the wiper arm 9 and the distal end side of the crank 5 are connected to each other via the ball joint 6 so as to be rotatable. The front end side of the crank 5 does not slide in the longitudinal direction with respect to the wiper arm 9. As shown in FIG. 4, the wiper blade 10 is attached to the distal end side of the wiper arm 9 in a manner known per se. As described above, the wiper 1 of the present example includes the wiper arm 9 connected to the tip end side of the crank 5 so as to be relatively rotatable, and the wiper blade 10 attached to the wiper arm 9.

  Further, as shown in FIGS. 1 to 3, at least a part of the wiper arm 9 has a substantially C-shaped cross-sectional shape, and the above-described connecting member 8 has a C-shaped cross-sectional portion. It is fixed by fitting.

  On the other hand, as shown in FIG. 1, a base end portion of a second ball joint 11 different from the first ball joint 6 is fixed to the motor holder 2, and a tip end of the second ball joint 11 is fixed. A slider 13 is rotatably fitted to the ball portion 12. At this time, the motor holder 2 is fixed to the vehicle body, and the slider 13 is rotatably supported by the motor holder 2 via the second ball joint 11, and the second ball joint 11 is Since the slider 13 is fixed to the motor holder 2 in a stationary manner, the slider 13 can be rotated with respect to the vehicle body, but is supported in a stationary manner with respect to the vehicle body.

  As shown in FIGS. 2 and 3, the slider 13 described above is fitted to a portion of the wiper arm 9 having a C-shaped cross section so as to be slidable in the longitudinal direction X of the wiper arm 9. The slider 13 is slidably fitted in the longitudinal direction X of the wiper arm 9 to the portion on the distal end side of the wiper arm 9 rather than the portion of the wiper arm 9 to which the distal end side of the crank 5 is connected via the connecting member 8. It is. Thus, although the wiper 1 of this example is rotatable with respect to the vehicle body, the slider is supported so as not to move relative to the vehicle body and is slidably fitted to the wiper arm 9 in the longitudinal direction X. 13.

  FIG. 4 is a schematic front view showing a state in which the wiper 1 assembled with the above-described components is mounted on the vehicle body. The wiper 1 shown here is configured to wipe the glass surface of a windshield glass (front glass) 14 that partitions the front part of the passenger compartment. Also in FIG. 4, illustration of the hood which covers the upper part of an engine room is abbreviate | omitted.

  As described above and schematically shown in FIG. 4, the wiper blade 10 is attached to the distal end side of the wiper arm 9, and the wiper blade 10 is in contact with the front glass surface of the windshield glass 14. 4, the illustration of the crank 5 and the connecting member 8 shown in FIG. 1 is omitted, and only the output shaft 4 is shown for the electric motor 3, and only the position of the connecting member 8 is also shown. Are indicated by reference numerals 81, 82, 83, 84.

  As shown in detail below, the wiper arm 9 and the wiper blade 10 rotate in the direction of arrow B from the initial position indicated by the solid line in FIG. 4 and pass through the intermediate position indicated by the broken line and indicated by the two-dot chain line. To the end position. Subsequently, the wiper arm 9 and the wiper blade 10 rotate in the direction indicated by the arrow C in FIG. 4, pass through the intermediate position indicated by the one-dot chain line, and return to the initial position indicated by the solid line. The wiper arm 9 and the wiper blade 10 repeatedly perform such reciprocating motion while the wiper blade 10 is in sliding contact with the glass surface of the windshield 14, and raindrops adhering to the glass surface are wiped off by the wiper blade 10 during this time. Next, details of this operation will be clarified.

  When the wiper arm 9 and the wiper blade 10 are in the initial positions shown by solid lines in FIG. 4, the connecting member 8 that is the connecting portion between the crank 5 and the wiper arm 9 shown in FIG. Accounted for. Here, when the electric motor 3 shown in FIG. 1 starts operating and its output shaft 4 rotates in the direction of arrow A, the connecting member 8 is also indicated by the arrow A in FIG. Rotate in the direction. Along with this, the wiper arm 9 and the wiper blade 10 start to rotate in the direction indicated by the arrow B in FIG. As described above, when the wiper arm 9 and the wiper blade 10 are rotated, the slider 13 supported so as not to move relative to the vehicle body slides in the longitudinal direction with respect to the wiper arm 9, and the wiper arm 9 is centered on the slider 13. As shown in FIG.

  The connecting member 8 gradually approaches the slider 13 until the connecting member 8 which is the connecting portion of the crank 5 and the wiper arm 9 reaches the position indicated by reference numeral 82 in FIG. When the position shown is reached, the connecting member 8 is closest to the slider 13. At this time, the wiper arm 9 and the wiper blade 10 occupy an intermediate position indicated by a broken line in FIG. Subsequently, when the output shaft 4 of the electric motor 3 rotates in the direction of arrow A, and the connecting member 8 rotates to the position indicated by reference numeral 83 in FIG. 4, the wiper arm 9 and the wiper blade 10 are shown in FIG. The end position indicated by is reached. While the connecting member 8 rotates from the position indicated by reference numeral 82 in FIG. 4 to the position indicated by reference numeral 83, the connecting member 8 gradually moves away from the slider 13 while the slider 13 slides with respect to the wiper arm 9.

  As described above, the movement trajectory of each end of the wiper blade 10 from the initial position through the intermediate position to the end position is shown by a solid line D with an arrow in FIG.

  As the electric motor 3 continues to operate and the output shaft 4, the crank 5 and the connecting member 8 further rotate in the direction of arrow A, the wiper arm 9 and the wiper blade 10 move from the end positions indicated by the two-dot chain lines in FIG. When the connecting member 8 starts to rotate in the C direction and reaches the position indicated by reference numeral 84 in FIG. 4, the wiper arm 9 and the wiper blade 10 reach the intermediate position indicated by the alternate long and short dash line in FIG. 4. While the connecting member 8 rotates from the position indicated by reference numeral 83 to the position indicated by reference numeral 84, the connecting member 8 gradually moves away from the slider 13 while the slider 13 slides with respect to the wiper arm 9, and the connecting member 8. Is at the position indicated by the reference numeral 84, the connecting member 8 is farthest from the slider 13. Note that the angular positions of the wiper arm 9 and the wiper blade 10 shown by the broken line and the alternate long and short dash line in FIG. 4 are substantially the same, but in FIG. Shown slightly offset.

  Further rotation of the electric motor 2 causes the connecting member 8 to rotate from the position indicated by reference numeral 84 in FIG. 4 to the position indicated by reference numeral 81, and the wiper arm 9 and the wiper blade 10 are initially shown by solid lines in FIG. Return to position. During this operation, the slider 13 slides with respect to the wiper arm 9, and the connecting member 8 gradually approaches the slider 13.

  As described above, the movement trajectory of each end of the wiper blade 10 from the end position through the intermediate position to the return to the initial position is indicated by a solid line E with an arrow in FIG.

  As described above, according to the operation of the electric motor 3, the wiper 1 of the automobile of this example rotates around the base end side of the crank 5, and the position of the crank 5 is fixed with respect to the vehicle body as the crank 5 rotates. While the slider 13 slides with respect to the wiper arm 9, the wiper arm 9 swings around the slider 13 together with the wiper blade 10, and the wiper blade 10 swings the glass of the windshield glass 14 by the swing of the wiper blade 10. It is comprised so that the raindrop adhering to the said glass surface may be wiped off, slidingly contacting a surface.

  At that time, since the wiper 1 of this example has one wiper arm 9, the number of parts of the wiper 1 can be reduced, the structure can be simplified, and the cost can be suppressed.

  In addition, the wiper blade 10 moves when the wiper blade 10 rotates from the initial position to the end position while sliding on the glass surface, and the wiper blade 10 when the wiper blade 10 returns from the end position to the initial position. 10 movement trajectories E are different. For this reason, although the number of wiper arms 9 is one, when the wiper blade 10 reciprocally swings, the area where the wiper blade 10 wipes the glass surface is larger than that of the conventional wiper shown in FIG. To do. For this reason, the driver can ensure a sufficient field of view.

  Further, as shown in FIG. 1, the wiper arm 9 is divided into a first arm 15 having a substantially C-shaped cross section and a second arm 16 to which the wiper blade 10 is attached. When the second arm 16 is connected to the first arm 15 via the pivot pin 17 and the windshield glass 14 is cleaned, as shown by the arrow F in FIG. The arm 16 may be configured to be able to be rotated around the pivot pin 17 in a direction away from the surface of the windshield glass 14. At this time, since there is only one wiper arm 9 in this example, the configuration for rotatably connecting the second arm 16 to the first arm 15 is simplified, and an increase in cost is suppressed. be able to.

  On the other hand, in the wiper 1B shown in FIG. 6, since the wiper arm 9B is composed of the main arm 18B, the sub arm 19B, and the intermediate arm 20B, the main arm 18B and the sub arm 19B are divided into two parts. In order to bend one side with respect to the other, the structure is significantly complicated, and the cost of the wiper 1B is significantly increased. According to the wiper 1 of this example, such a problem can be avoided.

  In addition, the second arm 16, the wiper blade 10, and the electric motor 3 of the wiper 1 of the present example can use each component of the conventional wiper. The first arm 15 can be easily manufactured, for example, by extruding aluminum.

  The present invention is not limited to a windshield glass wiper, but can be applied to a wiper that wipes a glass surface such as a rear window glass, a side window glass, a mirror, or a headlamp lens.

DESCRIPTION OF SYMBOLS 1 Wiper 3 Electric motor 5 Crank 9 Wiper arm 10 Wiper blade 13 Slider X Longitudinal direction

Claims (1)

  A crank whose base end side is rotatably supported with respect to the vehicle body, an electric motor that rotationally drives the crank, a wiper arm that is rotatably connected to the distal end side of the crank, and a wiper blade attached to the wiper arm And a slider that is rotatable with respect to the vehicle body, but is supported in a stationary manner with respect to the vehicle body, and is fitted to the wiper arm so as to be slidable in the longitudinal direction thereof. The crank is rotated by the rotation of the wiper arm and the wiper blade swings with the wiper blade while the slider slides with respect to the wiper arm. An automobile wiper that wipes raindrops attached to the glass surface while sliding on the surface.

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