JP5000889B2 - Wiper arm with retainer rotation angle restriction structure - Google Patents

Description

  The present invention relates to a wiper arm of a vehicle wiper, and more particularly, to a wiper arm having a retainer rotation angle restricting structure.

  In general, a vehicle wiper includes a wiper blade that wipes a surface to be wiped such as a windshield, and a wiper arm that is connected to the wiper blade. It is held at a position where it is separated from the surface to be wiped, or held at a position where the wiper blade is pressed against the surface to be wiped. The wiper blade is reciprocated along the surface to be wiped while being pressed against the surface to be wiped by the drive motor through the wiper arm, and wipes the surface to be wiped by the blade rubber.

  1, 2A and 2B show an embodiment of a wiper arm used in this type of vehicle wiper. There are two types of methods for generating a pressing pressure with the wiper arm, one is a method of pulling the spring and the other is a method of compressing the spring. In the present specification, the latter type of arm will be described, but the type in the present invention may be either type. The illustrated wiper arm 1 includes a retainer 3 connected to a wiper blade (not shown) via an arm piece 2 and an arm head 5 rotatably connected to the retainer 3. The retainer 3 is connected to the arm head 5 via the rivet 4, and the retainer 3 and the arm head 5 can rotate with respect to each other about the rivet 4. In addition, the retainer 3 rotates to the surface to be wiped (counterclockwise in FIG. 1) with respect to the arm head 5, and the wiper blade is pressed against the surface to be wiped. The wiper blade can be held at a second position where the wiper blade is rotated away from the surface (clockwise in FIG. 1) and separated from the surface to be wiped. More specifically, in the initial position, the wiper blade connected to the retainer 3 via the arm piece 2 is pressed against the surface to be wiped, and in the second position, the wiper blade is separated from the surface to be wiped. The lockback state is entered.

  The retainer 3 has a U-shaped cross section, and a compression spring 10 is disposed along the longitudinal direction inside the retainer 3. One end 10 </ b> A of the spring 10 is fixed to the retainer 3 via an anchor member 12 provided inside the retainer 3, and the other end 10 </ b> B is fixed to the retainer side end of the arm head 5. Thus, the compression spring 10 always urges the retainer 3 in the direction in which the retainer 3 is rotated with respect to the arm head 5. Therefore, the retainer 3 is held at the initial position or the second position by the urging force of the compression spring 10. When the retainer 3 is rotated from the initial position against the biasing force of the compression spring 10 and exceeds a moderation point, the biasing force direction of the compression spring 10 that rotates the retainer is changed from the initial position direction to the second position. Switching to the position direction, the retainer 3 automatically rotates to the second position in the lockback state. Further, when the retainer 3 is rotated from the second position against the biasing force of the compression spring 10 and exceeds a moderation point, the direction of the biasing force of the compression spring 10 is similarly switched, and the retainer 3 is automatically initialized. Rotate to position.

  The wiper arm 1 has a first restricting means for restricting the rotation of the retainer 3 and holding it at the initial position, and a second restriction for restricting the rotation of the retainer 3 and holding it at the second position. Means.

  A pair of claw portions 7 are formed at the arm head side end of the retainer 3 so as to be directed inward with respect to each other. A curved groove 6 is formed at the retainer side end of the arm head 5 so that the claw portion 7 does not come into contact with the arm head 5 when the retainer 3 rotates. A stepped portion 9 for holding the retainer 3 at the second position is formed on the end side of the curved groove 6. That is, when the retainer 3 is rotated in the direction of the lockback state by the urging force of the compression spring 10, the claw portion 7 abuts on the stepped portion 9 through the curved groove 6, so that the retainer 3 is covered. The rotation in the direction away from the wiping surface is restricted and held at the second position in the lockback state. As described above, the pair of claw portions 7 formed at the arm head side end of the retainer 3 and the curved groove 6 formed at the retainer side end of the arm head 5 constitute the second restricting means. .

  A curved contact surface 8 is also formed on the retainer side of the arm head 5, and the contact surface 8 is disposed in the retainer 3. When the retainer 3 is rotated from the lockback state to the surface to be wiped by the urging force of the compression spring 10, the contact surface 8 contacts the back surface of the retainer 3, so that the retainer 3 is moved toward the surface to be wiped. Is restricted and held at the initial position. Thus, the first regulating means is constituted by the contact surface 8 formed on the retainer side of the arm head 5 and the back surface of the retainer 3.

  In such a conventional vehicle wiper, the retainer 3 held in the initial position is resisted against the urging force of the compression spring 10 in order to separate the wiper blade from the surface to be wiped when cleaning the wind glass or replacing the wiper blade. The rivet 4 is pivoted in the opposite direction to the surface to be wiped, and held in a standing state with respect to the surface to be wiped, that is, in a lockback state. At this time, as shown in FIG. 2B, the claw portion 7 of the retainer 3 comes into contact with the stepped portion 9 of the arm head 5, and the rotation of the retainer 3 is restricted and held at the second position in the lockback state. It was.

  However, in the rotation restriction of the retainer 3 by the conventional method, since the rotation of the retainer 3 is restricted by the claw part 7 having a small shape, the claw part 7 is deformed when the lockback state is repeated over a long period of time. However, there was a problem that the lockback position changed.

  As a result, the arm head side of the upper surface 3A of the retainer 3, that is, the side on the base end side, hits the upper surface of the arm head 5 and the arm head 5 is damaged.

  Moreover, in order to form the nail | claw part 7 of the retainer 3, the additional process of bending a part of retainer 3 was required.

  The present invention has been made paying attention to such problems, and is advantageous over the prior art in terms of strength and structure, and a wiper arm that can determine whether a wiper arm overlocks back or not with one structure. The purpose is to provide.

  In order to achieve the above object, a wiper arm according to the present invention includes a wiper blade for wiping a surface to be wiped, a retainer coupled via an arm piece, and an arm head coupled to the retainer so as to be rotatable. And a wiper arm having a biasing means for biasing one of the retainer and the arm head with respect to the other along the rotation direction. The retainer has an engaging portion on one side surface thereof, When the retainer has a curved portion on its one side surface and rotates the retainer in a direction to stand up with respect to the surface to be wiped, the rotation angle of the retainer is regulated by the contact of the engaging portion with the curved portion. I am doing so.

  The engaging portion may come into contact with the curved portion when the rotational force acting on the retainer acts in a direction away from the surface to be wiped by the urging force of the urging means.

  The retainer may be returned to the initial position by regulating the rotation angle of the retainer.

  You may make it hold | maintain a retainer in the position by control of the rotation angle of a retainer.

  The rotation angle at which the retainer is restricted may be determined by the shape of the curved portion of the arm head and / or the shape of the engaging portion.

  The engaging portion of the retainer may have a rounded shape.

  The curved portion of the arm head may have a rounded shape.

  The arm head further includes an inclined portion, and the bending portion may be formed so that the rotation angle of the retainer becomes an optimum angle by changing the length of the inclined portion. .

  The retainer may further include an inclined portion, and by changing the length of the inclined portion, the engaging portion may be formed so that the rotation angle of the retainer becomes an optimum angle. .

  The wiper arm may be configured such that the rotation angle of the retainer can be adjusted only by exchanging the arm head and / or the retainer.

  According to the present invention, since the rotation angle of the retainer can be regulated by bringing the engaging portion of the retainer into contact with the curved portion of the arm head, compared with the structure of a retainer having a conventional claw portion. However, the effect of increasing the strength can be achieved.

  Moreover, since the process of forming the claw portion of the retainer is unnecessary, the configuration can be simplified and the effect of reducing the manufacturing process can be achieved.

  In addition, since the retainer rotation angle restricting structure is provided, it is possible to obtain an effect that the wiper arm can be locked back and the rotation angle can be determined only by the structure of the present invention.

  In addition, since the rotation angle of the retainer depends on the shape of the curved portion of the arm head and / or the engaging portion of the retainer, the rotation angle of the retainer can be arbitrarily adjusted by simply changing the arm head and / or the retainer. The effect that it is possible can be produced.

  Further, since the rotation angle of the retainer is based on the shape of the curved portion of the arm head and / or the engaging portion of the retainer, it is possible to obtain an effect that the shape of the wiper arm can be easily determined.

  In addition, since the retainer and the arm head have rounded shapes, the wear of the abutting portions of both of them can be reduced and the strength can be increased.

  In addition, since the arm head has a curved portion and an inclined portion and the length of the inclined portion can be changed, it is easy to form the curved portion for realizing the optimum regulation of the rotation angle of the retainer. There is an effect.

  Furthermore, since the retainer has an engaging portion and an inclined portion, and the length of the inclined portion can be changed, it is easy to form the engaging portion for realizing optimum regulation of the rotation angle of the retainer. The effect that can be produced.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the structure similar to the prior art shown in FIG.1, FIG.2A and FIG.2B, and the description is simplified or abbreviate | omitted.

  FIG. 3 shows a part of the wiper arm 1 in this embodiment. The wiper arm 1 mainly includes a wiper blade (not shown) for wiping the surface to be wiped, a retainer 3 coupled via an arm piece 2, an arm head 5 coupled to the retainer 3 so as to be rotatable, and a retainer. 3 and a compression spring 10 that is an urging means for urging one of the arm heads along the rotation direction with respect to the other.

  The wiper arm 1 includes first restriction means for restricting the rotation of the retainer 3 and holding it at the initial position, as in the prior art. Further, the wiper arm 1 is provided with a second restricting means for restricting the rotation of the retainer 3 and holding the retainer 3 at the second position in the lockback state, or preventing the retainer 3 from being in the lockback state. The second restricting means of the wiper arm 1 is different from the configuration of the prior art as will be described later. Therefore, the wiper arm 1 according to this embodiment is provided with a pair of claw portions 7 formed at the arm head side end of the retainer 3 and a curved groove 6 formed at the retainer side end of the arm head 5. Absent.

  As shown in FIGS. 3 and 4, the wiper arm 1 is provided with a second restricting means between the retainer 3 and the arm head 5.

  The retainer 3 has a U-shaped cross section from an upper surface 3A and side surfaces 3B on both sides (only one side surface is shown in the figure). A convex engagement portion 15 and a substantially linear inclined portion 17 are provided on the arm head side of the side surface 3B on both sides, that is, on the base end side of the side surface 3B. The engaging part 15 has a rounded shape close to a part of a circle or an ellipse. The inclined portion 17 follows the engaging portion 15 and forms a proximal end portion of the side surface 3B of the retainer 3. The arm head 5 is a long member connected to a wiper link (not shown) at the base end portion 19. A concave curved portion 11 and a substantially linear inclined portion 13 are provided on the retainer side, that is, the distal end side of both side surfaces 18 of the arm head. The bending portion 11 has a rounded shape. The inclined portion 13 follows the bending portion 11 and forms end portions on both ends 18 of the arm head 5. Thus, the second restricting means is constituted by the engaging portions 15 provided on both sides of the retainer 3, the curved portions 11 provided on both sides of the arm head 5, and the like. Of course, the engaging part 15 may be provided only on one side of the retainer 3 and the curved part 11 may be provided only on one side corresponding to the arm head 5 to constitute the second restricting means.

  The retainer 3 and the arm head 5 are connected by a rivet 4 so as to be rotatable. A compression spring 10 is disposed below the upper surface 3A of the retainer 3 as in FIG. 2B. One end 10 </ b> B of the compression spring 10 is connected to the distal end side of the arm head 5, and the other end 10 </ b> A is fixed by an anchor member 12 of the retainer 3. Since the compression spring 10 is arranged in a state compressed more than the natural length, the biasing force biases one of the retainer 3 and the arm head 5 with respect to the other along the rotation direction of the retainer. The normal state in which the wiper blade attached to the wiper arm 1 is positioned on the windshield, which is the surface to be wiped, is actually the retainer 3 with respect to the arm head 5 on the side of the windglass than the state shown in FIGS. Tilt slightly and push the wiper blade against the windshield. The position of the retainer in the normal state is set as the initial position.

  When cleaning the wind glass or replacing the wiper blade, the retainer 3 is rotated from the initial position in the opposite direction to the wind glass around the rivet 4. Since the urging force by the compression spring 10 is applied between the retainer 3 and the arm head 5, initially, the retainer 3 is applied with rotational force in the direction of the wind glass surface. However, when a certain moderation point is exceeded, the rotational force received by the retainer 3 switches in a direction away from the window glass. In the invention according to the present application, by changing the shape of the bending portion 11 of the arm head 5, the position where the engaging portion 15 of the retainer 3 and the bending portion 11 of the arm head 5 are engaged is adjusted, and the rotation of the retainer is adjusted. The movement angle is limited. When the retainer 3 rotates and restricts the rotation angle at a point after the above-mentioned moderation point, the retainer stops at that position, that is, locks back. However, when the rotation angle is limited at a point before the moderation point, the retainer returns to the initial position by the rotational force of the compression spring 10. Hereinafter, this point will be described.

  5 and 6 show the wiper arm 1 having a structure in which the retainer 3 is not locked back. In this structure, when the retainer 3 is rotated from the initial position around the rivet 4 in the direction opposite to the window glass, the engaging portion 15 of the retainer 3 is brought into contact with the curved portion 11 of the arm head 5 before the moderation point. It comes to contact. A compression spring 10 (not shown) is disposed below the upper surface 3 </ b> A of the retainer 3, and the urging force of the compression spring 10 causes the rotatory power to be engaged with the retainer 3 in the wind glass surface direction. Therefore, when the retainer 3 comes into contact with the arm head 5, it returns to the initial position by this rotational force.

  FIG. 7 shows the wiper arm 1 having a structure in which the retainer 3 is locked back at a certain position. In this structure, when the retainer 3 is rotated about the rivet 4 from the initial position in the direction opposite to the windshield, the engaging portion 15 of the retainer 3 is moved to the curved portion 11 of the arm head 5 behind the moderation point. It comes to contact. A compression spring 10 (not shown) is disposed below the upper surface 3A of the retainer 3, and when the retainer 3 exceeds a moderation point, the retainer 3 is rotated in a direction away from the window glass by the urging force of the compression spring 10. Power is involved. Therefore, when the retainer 3 abuts on the arm head 5, the abutment portion restricts the rotational force in the direction away from the window glass, and the retainer 3 stops at that position.

  8 and 9 similarly show the wiper arm 1 having a structure for locking the retainer 3 in a certain position. However, the rotation angle of the retainer 3 is larger than that in FIG.

  Thus, the rotation angle when the retainer 3 is locked back and when it is locked back can be determined by the shape of the bending portion 11 of the arm head 5. Therefore, the wiper arm 1 can adjust the restriction of the rotation angle of the retainer 3 only by exchanging the arm head 5. A bending portion 11 and an inclined portion 13 are provided on the distal end side of both side surfaces 18 of the arm head 5. The bending portion 11 has a rounded shape. The inclined portion 13 follows the bending portion 11 and forms end portions on both ends 18 of the arm head 5. The shape of the bending portion 11 can be configured to an optimum shape by changing the length of the inclined portion 13. When the shape of the bending portion 11 is a large angled shape, the inclined portion 13 is shortened. When the shape of the bending portion 11 is a small angled shape, the inclined portion 13 is lengthened. When the shape of the bending portion 11 is a large angled shape, the rotation angle of the engaging portion 15 of the retainer 3 increases. Moreover, if the shape of the bending part 11 is made into the shape with a small angle, the rotation angle of the engaging part 15 of the retainer 3 will become small.

  Further, the rotation angle when the retainer 3 is not locked back or is locked back can be determined by the shape of the engaging portion 15 of the retainer 3. Therefore, the wiper arm 1 can adjust the restriction of the rotation angle of the retainer 3 only by replacing the retainer 3. An engaging portion 15 and an inclined portion 17 are provided on the proximal end side of the side surface 3B of the retainer 3. The engaging part 15 has a rounded shape close to a part of a circle or an ellipse. The inclined portion 17 follows the engaging portion 15 and forms a proximal end portion of the side surface 3B of the retainer 3. The shape of the engaging portion 15 can be configured to an optimum shape by changing the length of the inclined portion 17. When the shape of the engaging portion 15 is a large angled shape, the inclined portion 17 is shortened. When the shape of the engaging portion 15 is a small angled shape, the inclined portion 17 is lengthened. If the shape of the engaging part 15 is made into a shape with many angles, the rotation angle of the engaging part 15 of the retainer 3 will become small. Moreover, if the shape of the bending part 11 is made into the shape with a small angle, the rotation angle of the engaging part 15 of the retainer 3 will become large.

  Further, the rotation angle when the retainer 3 is not locked back or is locked back can be determined by the shape of the curved portion 11 of the arm head 5 and the shape of the engaging portion 15 of the retainer 3.

  Since the curved portion 11 of the arm head 5 and the engaging portion 15 of the retainer 3 have rounded shapes, even if both of them contact, there is little friction and wear due to contact can be reduced.

  In the above embodiment, the engaging portion 15 provided on the retainer 3 is convex, and the curved portion 11 provided on the arm head 5 is concave, but conversely, the concave engaging portion 15 is formed on the retainer 3. However, the convex curved portion 11 may be formed on the arm head 5.

  As described above, according to the present embodiment, the rotation angle of the retainer 3 can be regulated by bringing the engaging portion of the retainer 3 and the curved portion 11 of the arm head 5 into contact with each other. Even when compared with the structure of the retainer 3 having the portion 7, the effect that the strength can be increased can be achieved.

  Moreover, since the process of forming the claw part 7 of the retainer 3 is not required, the structure can be simplified and the manufacturing process can be reduced.

  Further, since the rotation angle of the retainer 3 depends on the shape of the curved portion 11 of the arm head 5 and / or the engaging portion 15 of the retainer 3, the rotation of the retainer 3 can be performed only by changing the arm head 5 and / or the retainer 3. There is an effect that the angle can be adjusted arbitrarily.

  Further, since the rotation angle of the retainer 3 is due to the shape of the curved portion 11 of the arm head 5 and / or the engaging portion 15 of the retainer 3, it is possible to obtain an effect that the shape of the wiper arm 1 can be easily determined. .

  In addition, since the retainer 3 and the arm head 5 have rounded shapes, it is possible to reduce the wear of the abutting portions between them, and to increase the strength.

  Moreover, since the arm head 5 has the bending part 11 and the inclination part 13, and the length of the inclination part 13 can be changed, the bending part 11 for implement | achieving the optimal control | control of the rotation angle of the retainer 3 is possible. The effect that formation becomes easy can be produced.

  Furthermore, since the retainer 3 has the engaging part 15 and the inclination part 17, and the length of the inclination part 17 can be changed, the engagement part 15 for implement | achieving the optimal regulation of the rotation angle of the retainer 3 is possible. The effect of facilitating the formation of can be achieved.

It is a perspective view of the wiper arm of a prior art. It is a disassembled perspective view of the wiper arm of a prior art. It is a bottom view of one example of a prior art wiper arm. It is a side view of the wiper arm in the embodiment of the present invention. Similarly, it is a perspective view of a wiper arm. Similarly, it is a side view of a wiper arm. Similarly, it is a perspective view of a wiper arm. Similarly, it is a perspective view of a wiper arm. Similarly, it is a side view of a wiper arm. Similarly, it is a perspective view of a wiper arm.

Explanation of symbols

1 Wiper arm 2 Arm piece 3 Retainer 3A Upper surface
3B Side 4 Rivet
5 Arm head 6 Curved groove 7 Claw 8 Contact surface
9 Stepped part 10 Compression spring
10A One end of the spring 10B The other end of the spring 11 Bending portion 12 Pressing member
13 Inclination part 15 Engagement part
17 Inclined part 18 Side
19 Base end

Claims (5)

A wiper arm,
A wiper blade for wiping the surface to be wiped and a retainer connected via an arm piece;
An arm head rotatably connected to the retainer;
E Bei and a biasing means for biasing along the rotational direction of one of said retainer and said arm head relative to the other,
The retainer has on its one side surface of the arm head side, it has a convex engagement portion tinged Marvi, and a substantially straight inclined portion following the engagement portion,
The arm head, the one side surface corresponding to said one side surface of the retainer has a curved portion of concave tinged Marvi, and a substantially straight inclined portion following the said curved portion,
The engaging portion of the retainer and the curved portion of the arm head are configured to be separated from each other when the retainer is in a non-standing state with respect to the wiping surface, and the retainer is disposed on the wiping surface. The engaging portion is configured to come into contact with the bending portion when rotating in a direction in which the engaging portion comes into contact with the bending portion. wiper arm, characterized but Ru is restricted, that. The wiper arm according to claim 1,
The rotational force acting on the retainer by the urging force of the urging means has a moderation point that switches so as to work in a direction away from the surface to be wiped from a direction toward the surface to be wiped , before the moderation point is exceeded. Alternatively , the wiper arm is characterized in that the engagement portion comes into contact with the bending portion after exceeding . The wiper arm according to claim 2,
The wiper arm according to claim 1, wherein when the engaging portion comes into contact with the curved portion before exceeding the moderation point, the retainer returns to the surface to be wiped by the urging force of the urging means . The wiper arm according to claim 2,
When the engaging portion comes into contact with the curved portion after exceeding the moderation point, the urging force of the urging means resists the rotational force acting on the retainer acting in the direction away from the surface to be wiped. , wiper arm, wherein said engagement portion is thereby locked braking the retainer in contact with the position on the curved portion, it. The wiper arm according to any one of claims 1 to 4,
The rotation angle at which the retainer is restricted by the contact of the engaging portion of the retainer with the bending portion of the arm head is determined by the shape of the bending portion and / or the shape of the engaging portion of the arm head. , A wiper arm characterized by that.

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