JP6108507B1 - Wiper arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper arm in which an arm main body is rotatably connected to an arm head, and can be appropriately suppressed from rattling in the lateral direction of the arm main body with respect to the arm head by a minimum change from a conventional product. I will provide a. A wiper arm including a retainer that is rotatably connected to an arm head at a base end portion includes an extension arm portion extending from the base end portion. In a normal use state, the extension arm portion 26 is disposed between the side wall portions 12 of the arm head 2, and the claw portion 26 </ b> A of the extension arm portion 26 is fitted into the opening 17 of the arm head 2. [Selection] Figure 7

Description

  The present invention relates to a wiper arm that includes an arm head and an arm body that is rotatably connected to the arm head.

2. Description of the Related Art Conventionally, a wiper arm provided in a wiper device of a vehicle or the like has been used in which an arm body is rotatably connected to an arm head. FIG. 11 shows such a conventional wiper arm 101. As illustrated, the wiper arm 101 includes an arm head 102 and a retainer 103 which is an arm main body.
The base end portion 104 of the retainer 103 is disposed between the side wall portions 105 of the arm head 102 and is pivotally supported with respect to a connecting shaft (not shown) bridged between the side wall portions 105. Thereby, the retainer 103 is rotatably connected to the arm head 102.

JP2014-101059

  By the way, in such a wiper arm 101, in order to ensure smooth rotation of the retainer 103 with respect to the arm head 102, an appropriate gap is provided between the base end portion 104 of the retainer 103 and the side wall portion 105 of the arm head 102. It is necessary to provide clearance. For this reason, the retainer 103 is not firmly held in the lateral direction (axial direction of the connecting shaft) with respect to the arm head 102, and thus the backlash of the retainer 103 in the lateral direction with respect to the arm head 102 has occurred.

  The present invention has been made paying attention to such problems, and in the wiper arm in which the arm body is rotatably connected to the arm head, the arm with respect to the arm head can be obtained by a minimum change from the conventional product. It is an object of the present invention to provide a wiper arm that can appropriately suppress the play in the lateral direction of the main body.

  The present invention relates to a wiper arm comprising an arm head and an arm main body rotatably connected to the arm head, wherein the arm main body is connected to the arm head from a connecting portion with respect to the arm head. The arm head is provided with an abutting portion disposed adjacent to the extension portion when the wiper arm is in normal use.

  The contact portion may be provided on both sides of the extension portion.

  The arm body is rotatable with respect to the arm head toward a side opposite to the bottom surface of the arm head, and the extension portion is disposed on the bottom surface of the arm head during normal use of the wiper arm. You may come to be.

  A claw part may be provided in the extension part, and a fitting part in which the claw part is fitted may be provided in the arm head.

The present invention relates to a wiper arm comprising an arm head and an arm main body rotatably connected to the arm head, wherein the arm main body is connected to the arm head from a connecting portion of the arm main body to the arm head. comprises an extension part extending out to the side, on the arm head, provided with a contact portion which is disposed adjacent to the axial direction of the normal the connecting portion to the extended portion in use of the wiper arm, the extensions When the arm main body is rotated upright with respect to the arm head, the arm main body is arranged at a position not adjacent to the contact portion in the axial direction of the connecting portion .

  If the contact part is provided on both sides of the extension part, rattling on the left and right sides of the arm body can be appropriately suppressed.

The arm body is rotatable with respect to the arm head toward the opposite side of the bottom surface of the arm head, and the arm head is attached with a spring member provided between the arm head and the arm body The extension part may be arranged on the bottom surface of the spring member attachment part during normal use of the wiper arm.

  If the extension part is provided with a claw part (for example, the claw part 26A) and the arm head is provided with a fitting part (for example, the opening part 17) in which the claw part is fitted, the extension part is in contact with the contact part of the arm head. Since it is held in a properly positioned state, it is possible to appropriately suppress rattling.

It is the perspective view which looked at the wiper arm in the embodiment of the present invention from the slanting upper part. It is the perspective view which similarly looked at the wiper arm from diagonally downward. It is the perspective view which similarly looked at the arm head from diagonally upward. It is the perspective view which similarly looked at the arm head from diagonally downward. It is the perspective view which similarly looked at the retainer from diagonally upward. It is the perspective view which similarly looked at the retainer from diagonally downward. Similarly, it is a perspective view of a part of the wiper arm, and shows a connecting portion of the arm head and the retainer when the wiper arm is in a normal use state. Similarly, it is a cross-sectional view of a part of the wiper arm, and shows a connecting portion between the arm head and the retainer when the wiper arm is in a normal use state. Similarly, it is a perspective view of a part of the wiper arm, and shows a connecting portion between the arm head and the retainer when the wiper arm is in a lockback state. Similarly, it is a cross-sectional view of a part of the wiper arm, and shows a connecting portion of the arm head and the retainer when the wiper arm is in a lockback state. It is the perspective view which looked at the conventional wiper arm from diagonally downward.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
In FIG. 1, the whole structure of the wiper arm 1 of embodiment of this invention is shown. As shown in the figure, the wiper arm 1 includes an arm head 2 that constitutes a base end portion of the wiper arm 1, and a retainer 3 that is an arm body that is rotatably connected to the arm head 2. .

  As shown in FIGS. 3 and 4, the arm head 2 includes a columnar base portion 11 and side wall portions 12 on both sides extending forward from both sides of the base portion 11. A drive shaft hole 13 penetrating in the vertical direction is formed in the base 11, and the arm head 2 is driven by a drive motor (not shown) through a drive shaft (not shown) fitted in the drive shaft hole 13. ).

  A connecting shaft 14 is bridged between the side wall portions 12 on both sides of the arm head 2. The retainer 3 is rotatably connected to the arm head 2 by attaching the base end portion 21 of the retainer 3 to the connecting shaft 14 so as to be rotatable. Further, a spring member mounting portion 15 is provided between the side wall portions 12 on both sides so as to be disposed between the base portion 11 and the connecting shaft 14, and a locking shaft 16 provided on the spring member mounting portion 15. Further, a base end portion of a spring member (not shown) is locked.

  The spring member is provided between the arm head 2 and the retainer 3, and acts so that the spring force of the spring member gives an appropriate biasing force with respect to the rotation of the retainer 3 with respect to the arm head 2. It is. Specifically, the spring member is supported by the retainer 2 when the wiper arm 1 is in a normal use state as shown in FIGS. 1 and 2 (a state in which the retainer 3 extends linearly from the arm head 2). The wiper blade (not shown) acts so as to be pressed against the surface to be wiped (such as the glass surface of the vehicle) with an appropriate pressing force, while the wiper arm 2 is in a locked back state as shown in FIGS. When the retainer 2 is upright in a direction perpendicular to the arm head 2, a force is applied to the retainer 2 to maintain this lockback state.

  The bottom surface 2 </ b> A of the arm head 2 is cut out at the spring member mounting portion 15. As will be described later, a part of the extended arm portion 26 of the retainer 3 can be disposed in a space surrounded by the bottom surface 15A of the spring member mounting portion 15 and the side wall portions 12.

  The spring member mounting portion 15 is disposed at a distance from the base portion 11, and an opening portion 17 that opens toward the bottom surface side of the arm head 2 is formed between the base portion 11 and the spring member mounting portion 15. Yes. Further, a protruding piece 18 extends from the base end portion 11 toward the left and right central portion of the opening 17. As will be described later, the claw portion 26 </ b> A of the extended arm portion 26 of the retainer 3 is fitted into the opening portion 17.

  As shown in FIGS. 5 and 6, the retainer 3 is a long member having a U-shaped cross section, and is formed by resin molding, for example. A connecting recess 22 into which the connecting shaft 14 of the arm head 2 is fitted is formed at the base end portion 21 of the retainer 3. On the other hand, a coupling recess 24 for coupling a wiper blade (not shown) is formed at the tip 23 of the retainer 3. Further, a spring member attaching portion 25 to which a tip end portion of the spring member is attached is provided near the center in the longitudinal direction of the retainer 3.

  The base end portion 21 of the retainer 3 is formed with a narrow width so that it can be disposed between the side wall portions 12 of the arm head 2. Further, a groove portion 21B for arranging a part of the spring member is formed in the center portion in the left-right direction of the bottom surface 21A of the base end portion 21, and the bottom surface 21A side of the base end portion 21 is a left and right divided portion. It is divided into 21C and 21D.

  A pair of extended arm portions 26 that are extended portions extending in the longitudinal direction of the retainer 3 are provided from the divided portions 21 </ b> C and 21 </ b> D of the base end portion 21. The end of the extended arm 26 is a bent claw 26A.

  As shown in detail in FIGS. 7 and 8, when the wiper arm 2 is in a normal use state, the extended arm portion 26 extends along the bottom surface 2 </ b> A of the arm head 2 and is disposed between the side wall portions 12 on both sides. The claw portion 26A of the extension arm portion 26 is fitted to the opening portion 17 of the arm head 2 while being placed on the bottom surface 15A of the spring member mounting portion 15. In this case, the left and right extension arm portions 26 are arranged on both sides of the protruding piece 18 so as to sandwich the protruding piece 18 of the arm head 2.

  With such a configuration, rattling of the retainer 3 in the left-right direction with respect to the arm head 2 is appropriately suppressed. That is, that is, the extended arm portion 26 of the retainer 3 is extended to a position away from the connecting portion (the connecting shaft 14 and the connecting recess 22) of the arm head 2 and the retainer 3, so that the retainer 3 is slightly attached to the arm head 2. Even with the rattling, the outward side portion 26B (side portion facing the side wall portion 12) of the extension arm portion 26 abuts on the inward surface 12A of the side wall portion 12. Similarly, the extended arm portion 26 abuts the protruding piece 18 at the inward side portion 26 </ b> C (side portion facing the protruding piece 18) even if the retainer 3 slightly rattles against the arm head 2. Therefore, the movement of the retainer 3 in the left-right direction (lateral direction) with respect to the arm head 2 is suppressed to a small amount by the contact of the extended arm portion 26 with the side wall portions 12 and the protruding pieces 18.

  Further, since the claw portion 26A of the extension arm portion 26 is adapted to fit into the opening 17 of the arm head 2, the extension arm portion 26 is correctly disposed between the side wall portions 12 of the arm head 2. Since it continues, it can prevent rattling appropriately.

  Further, such a rattling-preventing configuration provides the retainer 3 with the extended arm portion 26 extending from the base end portion 21, while only providing a notch in a part of the arm head 2 (the bottom surface 15 </ b> A of the spring mounting portion 15). The side wall 12 and the opening 17 party in the arm head 2 can be used as they are. Therefore, the backlash prevention of the retainer 3 with respect to the arm head 2 can be achieved at a low cost by a necessary minimum change to the conventional product.

  On the other hand, as shown in FIG. 9 and FIG. 10, when the wiper arm 2 is in the lockback state, that is, when the retainer 3 stands up at a substantially right angle with respect to the arm head 2, the extension arm portion 26 has the retainer 3. Since the arm head 2 moves in a direction away from the arm head 2, the arm head 2 comes out of the space between the side wall portions 12 and the opening 17. Therefore, the extension arm portion 26 does not hinder the lockback operation of the wiper arm 2.

DESCRIPTION OF SYMBOLS 1 Wiper arm 2 Arm head 2A Bottom surface of arm head 3 Retainer 11 Base part of arm head 12 Side wall part of arm head 12A Inward surface of side wall part 13 Drive shaft hole of arm head 14 Arm shaft connecting shaft 15 Spring member of arm head Mounting portion 15A Bottom surface of spring member mounting portion 16 Arm head locking shaft 17 Arm head opening 18 Arm head protruding piece 21 Retainer base end portion 22 Retainer connection recess portion 23 Retainer distal end portion 24 Retainer coupling recess portion 25 Retainer spring member mounting portion 26 Retainer extension arm portion 26A Extension arm claw portion 26B Extension arm portion outward side portion 26C Extension arm portion inward side portion

Claims (4)

In a wiper arm comprising an arm head and an arm main body rotatably connected to the arm head,
The arm body includes an extension portion extending from the connecting portion of the arm body to the arm head toward the arm head side,
The arm head includes a contact portion that is disposed adjacent to the extension portion in the axial direction of the extension portion during normal use of the wiper arm ,
The extension portion is arranged at a position that is not adjacent to the contact portion in the axial direction of the connecting portion when the arm body is rotated to stand up with respect to the arm head. Wiper arm.   The wiper arm according to claim 1, wherein the contact portion is provided on both sides of the extension portion. The arm body is rotatable with respect to the arm head toward the opposite side of the bottom surface of the arm head, and the arm head is attached with a spring member provided between the arm head and the arm body comprising a spring member mounting portion that is, the extension, the wiper arm according to normal the spring claim has as a member is disposed on the bottom surface of the mounting portion 1 or claim 2 in use of the wiper arm .   The wiper arm according to any one of claims 1 to 3, wherein a claw portion is provided in the extension portion, and a fitting portion into which the claw portion is fitted is provided in the arm head.

Images