JP2004249823A - Wiper arm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper arm allowing the setting of the presence or absence of a lock back function by selecting the locking position of a spring without changing an arm head and an arm member, and a wiper device. <P>SOLUTION: This wiper arm is provided with the arm head 10, the arm member 20 rotatably connected in the direction of the erected attitude thereof, and a spring member (spring 25). The arm head 10 has locking pins 19a and 19b selectively locking one end of the spring member and a stopper surface 16 restricting the rotation of the arm member 20 by a specified rotating angle or more. The locking pin 19a is installed at a position where the rotation of the arm member 20 is restricted and a locking point C is positioned beyond a nodal point where a rotating force received by the arm member 20 is switched from in a direction close to a glass surface 2 to in a direction apart from the glass surface 2. The locking pin 19b is installed at a position where the locking point C is located at a position before the nodal point. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wiper arm and a wiper device, and more particularly, to a wiper arm and a wiper device capable of rotating an arm member to and away from a wiping surface with respect to an arm head connected to a vehicle.
[0002]
[Prior art]
Generally, there is known a wiper device for a vehicle having a so-called lockback function of holding a wiper arm in an upright posture so as to facilitate work during maintenance such as replacement of a wiper blade or cleaning of a glass surface of a vehicle (for example, Patent Document 1).
[0003]
The above-mentioned wiper arm for a vehicle includes an arm head connected to a pivot shaft on the vehicle side, and an arm member attached to the arm head rotatably in a direction of coming into contact with and separating from the glass surface and having a wiper blade attached to a tip end. Have.
[0004]
The arm member is rotatably connected to a direction in which the arm member stands upright with respect to the arm head by a rotation shaft (hereinafter, referred to as a standing posture rotation direction). Further, a tension spring and a spring guide as a spring member are stretched between the arm head and the arm member.
[0005]
The spring member is disposed on the glass surface side of the rotation shaft, and both ends thereof are attached to the locking portions of the arm head and the arm member, respectively. Further, the spring is extended and assembled to the wiper arm, and a tensile force is applied between the arm head and the arm member.
[0006]
Therefore, a rotational force is applied to the arm member by the tension of the spring in a direction in which the arm member rotates toward the glass surface around the rotation axis, and a pressing force is applied to the wiper blade toward the glass surface by the rotational force. Have been.
[0007]
The lockback function will be briefly described. When the arm member is rotated from the state where the wiper blade and the glass surface are in contact with each other (hereinafter, referred to as a normal state) in the upright posture rotation direction with respect to the arm head, the arm member initially has Rotational force is applied in the direction of the glass surface.
[0008]
That is, with the rotation of the arm member, the spring engagement point on the arm member side (the engagement point between the arm member and the spring member) moves, and the rotation axis and the spring engagement point on the arm head side (arm head side). Until a point (hereinafter, referred to as a detent point) that overlaps a line connecting the arm member and the locking point with the spring member is applied, a rotational force is applied to the arm member in the glass-side direction.
[0009]
However, when the arm member is further rotated in the upright posture rotation direction with respect to the arm head, and the spring locking point on the arm member side exceeds the detent point, the pulling force of the spring is moved in the upright posture rotation direction with respect to the arm member. To give the turning force. When the end of the arm member further rotates until it comes into contact with the upper surface (stopper surface) of the arm head, the wiper arm is held in the upright posture in this state.
[0010]
On the other hand, in order to surely prevent forgetting to release the lock-back state in which the upright posture of the wiper arm is maintained, a wiper arm in which the rotation until the upright posture is maintained beyond the detent point is known. (For example, see Patent Document 2).
[0011]
That is, in the wiper arm of the type having no lock-back function, the rotation in the upright posture rotation direction is limited to a predetermined rotation angle or less by the stopper mechanism. For example, the stopper mechanism includes a stopper pin provided on the arm member and a stopper claw provided on the arm head. The stopper pin and the stopper are provided at a rotation angle position before reaching the detent point so that the wiper arm does not enter the lockback state. The pawl is brought into contact with the pawl to regulate the rotation of the arm member.
[0012]
[Patent Document 1]
JP-A-5-213160 (FIGS. 3-5 and 3-4)
[0013]
[Patent Document 2]
Japanese Utility Model Publication No. 57-63763 (page 1, FIG. 2)
[0014]
[Problems to be solved by the invention]
As described above, an arm member having no stopper mechanism and an arm head must be prepared for the wiper arm having the lockback function. In addition, an arm member having a stopper mechanism and an arm head must be prepared for a wiper arm having no lockback function.
[0015]
For this reason, in setting the wiper arm having the lockback function and the wiper arm not having the lockback function, there is a problem that the type and the number of parts are increased, which is a factor that increases the manufacturing cost of the wiper arm and the wiper device. Was.
[0016]
SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to use a wiper arm and a wiper arm that can set the presence or absence of a lockback function by selectively selecting a locking position of a spring without changing an arm head and an arm member. To provide a wiper device.
[0017]
[Means for Solving the Problems]
According to the wiper arm of the present invention, the arm head is fixed to a pivot shaft rotatably supported on the vehicle body, and the arm head rotates in a direction in which the arm head comes into contact with and separates from the wiping surface. A wiper arm including an arm member movably connected at one end and a wiper blade at the other end, and a spring member having one end locked to the arm head and the other end locked to the arm member. In the arm head, a first locking portion and a second locking portion in which one end of the spring member is selectively locked, and the arm member is in contact with the arm member so that the arm member is in contact with the arm head. A stopper surface for restricting rotation of the spring member by a predetermined angle or more in the upright posture rotation direction, wherein the first locking portion is provided when one end of the spring member is locked to the first locking portion. The arm When the material is rotated in the upright posture rotation direction and the rotation is restricted by the stopper surface, the rotational force received by the arm member by the urging force of the spring member with respect to the first locking portion is reduced by the wiping. The spring member is provided at a position where the other end of the spring member is located beyond a detent point at which the switch is made in a direction away from the wiping surface from the surface direction, and the second locking portion is provided on the second locking portion. In a state where one end of the spring member is locked, when the arm member rotates in the upright posture rotation direction and the rotation is restricted by the stopper surface, the arm member rotates to the detent point with respect to the second locking portion. The problem is solved by providing the spring member at a position where the other end of the spring member is not located.
[0018]
As described above, according to the present invention, the arm head is provided with the first locking portion and the second locking portion for locking one end of the spring member. One end of the spring member is locked to the first locking portion, and when the arm member is turned in a direction in which the arm member stands up with respect to the arm head (rotation direction in the standing posture), the rotation of the arm member is restricted. By this time, the locking point at the other end of the spring member is disposed so as to exceed the detent point with respect to the first locking portion. In addition, even if the second locking portion is locked at one end of the spring member and is rotated to an angle at which the rotation is regulated in the direction in which the arm member stands, the locking point at the other end of the spring member is maintained. It is arranged so as not to reach the moderation point with respect to the second locking portion.
[0019]
With this configuration, when one end of the spring member is locked by the first locking portion, the rotational force applied to the arm member is wiped when the arm member rotates by a predetermined angle in the upright posture rotation direction. Switching from the plane direction to the standing posture rotation direction.
[0020]
At the angle at which the rotation of the arm member is restricted by the stopper surface, since a rotational force is applied to the arm member in the upright posture rotation direction, the arm member can be held in the upright posture in the lockback state.
[0021]
On the other hand, when one end of the spring member is locked by the second locking portion, even if the arm member is rotated to an angle that restricts the rotation in the direction in which the arm member stands, the above-mentioned moderation point cannot be exceeded, Since the rotational force in the wiping surface direction continues to be applied to the arm member, the arm member returns to the wiping posture position when the rotation in the standing posture direction is released.
[0022]
Thus, when one end of the spring member is locked to the first locking portion, the wiper arm can be set to have a lockback function, and one end of the spring member is engaged to the second locking portion. When stopped, the wiper arm can be set to have no lockback function. Therefore, by selectively selecting the first locking portion or the second locking portion, it is possible to selectively set the presence or absence of the lockback function without changing the arm head and the arm member.
[0023]
According to another aspect of the present invention, there is provided a wiper arm, wherein the arm head is fixed to a pivot shaft rotatably supported on a vehicle body, and a direction in which the arm head comes into contact with and separates from a wiping surface. An arm member rotatably connected to one end and a wiper blade to the other end, and a spring member having one end locked to the arm head and the other end locked to the arm member. In the wiper arm, the arm head comprises a first locking portion and a second locking portion at which one end of the spring member is selectively locked, and the arm member is in contact with the arm member and the arm member is in contact with the arm head. A stopper surface for restricting rotation of the arm member by a predetermined angle or more in the upright posture rotation direction with respect to the first and second locking portions. Turn to At a position located on the wiping surface side with respect to a straight line S connecting a locking point between the other end of the spring member and the arm member in a non-existent state, and a rotation axis center O of the arm member with respect to the arm head. And a straight line E connecting the locking point and the rotation axis center O in a state where the arm member rotates in the upright posture rotation direction and the rotation is restricted by the stopper surface. Also, the problem is solved in that the first locking portion is provided on the pivot shaft side, and the second locking portion is provided on the arm member side.
[0024]
As described above, according to the present invention, the first locking portion and the second locking portion are connected to the other end of the spring member in the normal state where the arm member is not rotated in the upright posture rotation direction with respect to the arm head. It is arranged at a position located on the wiping surface side with respect to the straight line S connecting the locking point with the arm member and the center O of the rotation axis of the arm member with respect to the arm head.
Therefore, even if one end of the spring member is locked to either the first locking portion or the second locking portion, in the normal state, the arm member is rotated about the rotation axis O by the biasing force of the spring member. Rotational force is applied in the direction of the wiping surface.
[0025]
Further, the first locking portion and the second locking portion connect the locking point in a state where the rotation of the arm member in the upright posture rotation direction is restricted by the stopper surface, and the rotation axis center O. It is provided in a part located on the pivot axis side and the arm member side with respect to the straight line E, respectively.
Therefore, when one end of the spring member is locked by the first locking portion, a rotational force is applied to the arm member in the upright posture rotation direction in a state where the rotation of the arm member in the upright posture rotation direction is restricted. Therefore, the arm member is held in the upright posture.
[0026]
On the other hand, when one end of the spring member is locked by the second locking portion, a rotational force is applied to the arm member toward the wiping surface in a state where the rotation of the arm member in the upright posture rotation direction is restricted. Therefore, the arm member returns to the wiping posture position without being held in the standing posture.
[0027]
As described above, according to the wiper arm of the present invention, since one end of the spring member is locked to the first locking portion or the second locking portion, the setting having the lockback function and the lockback function are not provided. It can be set. Therefore, by selectively selecting the first locking portion or the second locking portion, it is possible to selectively set the presence or absence of the lockback function without changing the arm head and the arm member.
[0028]
As described in claim 3, the stopper surface is formed on an arc whose radius is a distance from a rotation axis center O of the arm member to the arm head to an end of the arm member on the arm head side. And a step formed on the upper surface of the arm head.
[0029]
In this way, by changing the shape of the upper surface of the arm head, a stopper surface that comes into contact with the end of the arm member is formed. Therefore, since the stopper mechanism is not formed by using a separate part, the rotation of the arm member in the standing posture rotation direction with respect to the arm head is restricted to a predetermined rotation angle without increasing the number of parts and the number of assembling steps. be able to.
[0030]
According to a fourth aspect of the present invention, in the upright posture rotation direction from the wiping surface to a straight line L1 connecting a rotation axis center O of the arm member with respect to the arm head and the first locking portion. The rotation angle can be set smaller than the rotation angle in the standing posture rotation direction from the wiping surface to a straight line L2 connecting the rotation axis center O and the second locking portion.
[0031]
With this setting, when the first locking portion is locked to one end of the spring member, a wiper arm having a lockback function can be configured, and the second locking portion can be fixed to one end of the spring member. When locked, a wiper arm having no lockback function can be configured.
[0032]
Further, as described in claim 5, when the arm member rotates in the upright posture rotation direction and the rotation is regulated by the stopper surface, the other end of the spring member and the arm member are connected. The locking point may be set such that the stopper surface and the arm member come into contact with each other in a rotation angle range between the straight line L1 and the straight line L2 in the standing posture rotation direction.
[0033]
With this setting, at the rotation angle at which the rotation of the arm member is restricted, the locking point on the arm member side becomes the first engagement point when the first locking portion is locked to one end of the spring member. When the second locking portion is positioned at a position beyond the moderation point with respect to the second locking portion when the second locking portion is locked at one end of the spring member, the first locking is performed. By selectively selecting the part or the second locking part, the presence or absence of the lockback function can be selectively set.
[0034]
According to a sixth aspect of the present invention, when the wiper device includes the wiper arm according to any one of the first to fifth aspects, the wiper device has a lock back function. This makes it possible to selectively set the wiper device, so that the wiper device can be commonly used for a vehicle type having a lockback function and a vehicle type having no lockback function. Thus, component management costs and manufacturing costs can be reduced by sharing components.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a wiper device according to one embodiment, FIG. 2 is a perspective view of the wiper arm according to one embodiment, FIGS. 3 to 5 show the wiper arm when lockback is enabled, and FIG. FIG. 4 is a cross-sectional explanatory view of a state where the wiper arm is in a normal position, FIG. 4 is a cross-sectional explanatory view of a state where the wiper arm of one embodiment is rotated to a detent point position, and FIG. It is sectional explanatory drawing of the state which moved.
[0036]
6 and 7 show the wiper arm when lockback is disabled. FIG. 6 is a cross-sectional explanatory view showing a state where the wiper arm of one embodiment is in a normal position. FIG. FIG. 8 is an explanatory cross-sectional view illustrating a state in which the locking pin has been rotated to the restricting position. FIG. Further, the arrangement, shape, and the like described below do not limit the present invention, and it is needless to say that various modifications can be made in accordance with the gist of the present invention.
[0037]
As shown in FIG. 1, in the wiper device W of this example, the power from the wiper motor 3 is transmitted to the pivot shaft 5 via the link mechanism 4, and the wiper arm 1 attached to the pivot shaft 5 swings back and forth. The wiper blade 30 attached to the tip of the wiper arm 1 is swung back and forth to wipe the glass surface 2 as the wiping surface.
[0038]
The wiper arm 1 of the present example is a wiper arm that can selectively set a setting having a lockback mechanism and a setting not having a lockback mechanism. As shown in FIG. 2, the wiper arm 1 is connected to a pivot shaft 5 rotatably supported on a vehicle body, and is rotatable with respect to the arm head 10 in a standing posture rotation direction. An arm member 20 connected to the arm head 10 is provided.
[0039]
A wiper blade 30 for contacting and wiping the glass surface 2 is connected to the tip of the arm member 20. The wiper blade 30 includes a blade rubber that contacts the glass surface 2 and a plurality of holding levers that hold the blade rubber.
[0040]
The arm head 10 includes a cylindrical mounting portion 12 and a support portion 14 extending radially outward from the mounting portion 12. A taper separation is formed at the tip of a pivot shaft 5 serving as a rotation shaft protruding from the vehicle body side, and the tip of the pivot shaft 5 penetrates through the mounting portion 12 and is fastened with a nut 5 a, whereby an arm head 10 is formed. Is connected to the pivot shaft 5 in a detented state.
[0041]
A stopper surface 16 is formed on the upper surface of the arm head 10. When the arm member 20 rotates a predetermined angle about the hinge pin 62 in the direction of coming and coming from the glass surface 2, the stopper surface 16 is formed. The end portion of the retainer 21 is in contact with a contact portion 21b, so that the rotation of the arm member 20 by a predetermined angle or more is restricted.
[0042]
The arm member 20 includes a long retainer 21 and an arm piece 22 fixed to the retainer 21. The retainer 21 is a long body having a U-shaped cross section, and the glass surface 2 side is open.
[0043]
At one end in the longitudinal direction of the retainer 21, a connecting portion 21a extending in the longitudinal direction from both side walls of the end is formed. A part of the side surface of the support portion 14 is covered by the connecting portion 21 a of the retainer 21, and a hinge pin 62 serving as a rotation shaft is inserted through the covered portion, and the hinge pin 62 allows the retainer 21 and the arm head 10 to communicate with each other. Is connected. Thus, the arm member 20 is rotatably supported on the arm head 10 in a direction away from the glass surface 2.
[0044]
At the other end in the longitudinal direction of the retainer 21, an arm piece 22, which is a thin and narrow plate-like body, is swaged while being held by a pair of side walls of the retainer 21, and is fixed by a rivet 64. A wiper blade 30 is rotatably supported by a rivet shaft 66 at the tip of the arm piece 22.
[0045]
Next, the configuration of the wiper arm 1 set to have the lockback function will be described with reference to FIG. FIG. 3 shows a normal state in which the arm member 20 is not rotated in a direction (clockwise in the figure) standing up with respect to the arm head 10, and the blade rubber of the wiper blade 30 is in contact with the glass surface 2. .
[0046]
A groove 10a is formed on the back surface on the distal end side of the support portion 14 of the arm head 10 along the extending direction from the middle of the support portion 14 in the longitudinal direction to the distal end. A locking pin 19a as a first locking portion and a locking pin 19b as a second locking portion are attached to the groove 10a substantially in parallel with the hinge pin 62. The locking pin 19a and the locking pin 19b are provided on the mounting portion 12 side and the distal end side, respectively, and the ends of the spring member are locked.
[0047]
On the back side of the retainer 21, an arm piece 22 fixed to the retainer 21 extends toward the arm head 10, and a locking portion 22a of a spring member is formed at the tip of the arm piece 22.
[0048]
As shown in FIG. 3, in the wiper arm 1 of the present example, the locking portion 22a of the arm member 20 and the locking pin 19a of the arm head 10 are formed by bending a thin rod body into a C shape. The spring 24 is extended via a spring guide 68. The spring guide 68 and the spring 24 constitute a spring member of the present example.
[0049]
That is, one end of the spring guide 68 is attached to the locking pin 19a, and a hook 24a at the other end of the spring 24 is attached to the locking portion 22a. Here, a contact point between the locking portion 22a and the hook 24a is defined as a locking point C. The other end of the spring guide 68 and the hook 24b on one end of the spring 24 are locked.
[0050]
In the state shown in FIG. 3, the locking point C is located closer to the glass surface 2 than the straight line L1 connecting the rotation axis center O of the hinge pin 62 and the locking pin 19a. Since a tensile force (biasing force) of the spring 24 is applied between the arm member 20 and the arm head 10, the arm member 20 has the rotation axis center O as the rotation center and the glass surface 2 direction ( Rotational force is applied in the counterclockwise direction in the figure. Thus, a predetermined pressing force is applied to the wiper blade 30 in the direction of the glass surface 2.
[0051]
Next, an operation of the wiper arm 1 of the present example in which the arm member 20 rotates in the upright posture rotation direction (the direction of the arrow A) with respect to the arm head 10 will be described. FIG. 4 illustrates a state in which the arm member 20 is lifted in the upright posture rotation direction about the rotation axis center O as the rotation center, and the locking point C reaches the straight line L1.
[0052]
Until the locking point C reaches the straight line L1, a rotational force is applied to the arm member 20 counterclockwise by the tensile force of the spring 24 as described above, but when the locking point C reaches the straight line L1 (FIG. 4) The arm member 20 is temporarily in a neutral state in which no force is applied in the rotation direction (a position where the distance between the locking pin 19a and the locking point C is the largest).
[0053]
However, when the arm member 20 is further rotated in the standing posture rotation direction beyond the straight line L1, the locking point C is located in a direction away from the glass surface 2 beyond the straight line L1. A rotational force is applied clockwise by the tensile force of the spring 24.
[0054]
That is, when the arm member 20 rotates in the upright posture rotation direction, the locking point C moves on an arc centered on the rotation axis center O. Here, the point at which the locking point C coincides with the straight line L1 is the moderation point, and a rotational force is applied to the arm member 20 in the counterclockwise direction in the rotation angle range until the locking point C reaches the moderation point. No rotational force is applied at the turning angle where the stop point C overlaps with the moderation point, and a turning force is applied clockwise in the range of the rotation angle where the locking point C exceeds the moderation point.
[0055]
FIG. 5 shows a state in which the arm member 20 is held in the upright posture. When the arm member 20 is rotated by a predetermined angle from the state shown in FIG. 4, the contact portion 21b of the retainer 21 and the stopper surface 16 of the arm head 10 come into contact with each other. Rotation is restricted.
[0056]
The stopper surface 16 is a step formed on the upper surface of the support portion 14 and is formed so as to be located on an arc whose radius is the distance from the rotation axis center O to the contact portion 21b. As described above, since the stopper surface 16 is formed by changing the shape of the upper surface of the arm head 10 to be a stepped portion, it is not necessary to additionally attach another component for configuring the stop mechanism, There is no increase in the number of parts or the number of assembly steps.
[0057]
In the state shown in FIG. 5, the locking point C is located within the rotation angle range exceeding the detent point, so that in the lock-back state, the arm member 20 is subjected to clockwise rotation as described above, The member 20 is held in the upright posture.
[0058]
The straight line E in the figure is a line connecting the locking point C and the center O of the rotation axis, and is a rotation angle position (rotation restriction position) where the rotation of the arm member 20 in the clockwise direction is restricted. The locking pin 19a is disposed on the right side of the straight line E in the drawing so that a rotational force is applied clockwise to the arm member 20 in FIG.
[0059]
Even in the state shown in FIG. 5, since the spring guide 68 is formed to be bent, the locking pin 19b does not interfere with the spring guide 68.
[0060]
Next, the wiper arm 1 set to have no lock-back function will be described with reference to FIG. The arm head 10 and the retainer 21 are commonly used for the wiper arm 1 even in a setting having no lockback function.
[0061]
As shown in FIG. 6, in a case where the lock back function is not set, the hook 25b of the spring 25 as a spring member is attached to the locking pin 19b. The hook 25b is formed on the spring 25 via an extension 25c linearly extending from a main body portion formed in a coil shape.
[0062]
On the other hand, a hook 25a similar to the hook 24a of the spring 24 is formed on the locking portion 22a side of the spring 25, and the hook 25a is attached to the locking portion 22a. Here, a contact point between the hook 25a and the locking portion 22a is defined as a locking point C.
[0063]
FIG. 6 shows a normal state (wiping posture) in which the arm member 20 is not rotating in the standing posture rotation direction. In this case, since the locking point C is located on the glass surface 2 side with respect to the straight line L2 connecting the rotation axis center O and the locking pin 19b, the arm member 20 is rotated counterclockwise by the tensile force of the spring 25. Power is on.
[0064]
FIG. 7 shows a state in which the rotation of the arm member 20 in the upright posture rotation direction is restricted. In this state, the locking point C is located within the rotation angle range from the glass surface 2 to the straight line L2 in the upright posture rotation direction. That is, the locking point C is located within the range of the rotation angle up to the detent point with respect to the locking pin 19b. Therefore, in the state of FIG. 7, a rotational force is applied to the arm member 20 in the counterclockwise direction.
[0065]
As described above, when the wiper arm 1 is set to have no lock-back function, the arm member 20 rotates only in the counterclockwise direction within the angle range in which the arm member 20 can rotate in the upright posture rotation direction. Since the force is applied, the arm member 20 is not held in the standing posture, and the arm member 20 returns to the wiping posture position when the rotation in the standing posture direction is released.
[0066]
As described above, the arm head 10 of the present example is provided with the locking pin 19a corresponding to the setting having the lockback function and the locking pin 19b corresponding to the setting not having the lockback function. By appropriately selecting the locking pin 19a or the locking pin 19b, the presence or absence of the lockback function can be selectively set without changing the arm head 10 and the arm member 20.
[0067]
FIG. 8 shows the relationship between the straight lines L1, L2, and E. A straight line connecting the locking point C and the center O of the rotation axis in a normal state in which the arm member 20 is not rotated in the upright posture rotation direction is defined as a straight line S. As can be seen from FIG. 8, the locking pin 19a and the locking pin 19b are disposed in such a position that the straight line E is located within the angular range from the straight line L1 to the straight line L2 in the clockwise direction.
[0068]
Since the locking pin 19b is located closer to the distal end of the support portion 14 than the locking pin 19a, the rotation angle between the glass surface 2 and the straight line L2 in the upright posture rotation direction is smaller than the rotation angle. And the straight line L1 has a smaller rotation angle in the upright posture rotation direction.
[0069]
Further, in both the setting having the lock-back function and the setting not having the lock-back function, in the normal state, a rotational force is applied to the arm member 20 in the direction of the glass surface 2 about the rotation axis center O. As described above, both the locking pin 19a and the locking pin 19b are disposed closer to the glass surface 2 than the straight line S.
[0070]
In addition, in the setting having the lockback function, in order to apply a rotational force to the arm member 20 in the upright posture rotation direction at the rotation position where the rotation of the arm member 20 in the upright posture rotation direction is restricted. The locking pin 19a is disposed closer to the pivot shaft 5 than the straight line E.
[0071]
Further, in a setting not having the lock-back function, a rotational force is applied to the arm member 20 in the direction of the glass surface 2 at the rotation position where the rotation of the arm member 20 in the upright posture rotation direction is restricted. The locking pin 19b is located closer to the distal end of the arm head 10 than the straight line E.
[0072]
As described above, according to the embodiment of the present invention, according to the wiper arm and the wiper device, the arm head is provided with the first locking portion and the second locking portion for locking one end of the spring member, When one end of the spring member is locked by the first locking portion, when the arm member rotates to an angle that restricts the rotation in the standing posture rotation direction, the arm member stands up by the biasing force of the spring member. Rotational force is applied in the posture rotation direction.
[0073]
That is, when the arm member rotates in the upright posture rotation direction with respect to the arm head, the locking point of the other end of the spring member is not changed until the rotation of the arm member in the upright posture rotation direction is restricted. The rotational force applied to the arm member exceeds the moderation point at which the arm member switches from the wiping surface direction to the standing posture rotation direction.
[0074]
On the other hand, when one end of the spring member is locked by the second locking portion, even if the arm member is turned to the arm head to the angle in which the rotation is restricted in the upright posture rotation direction, the spring member is not moved. Due to the urging force, a rotational force is applied to the arm member in the wiping surface direction.
[0075]
That is, even if the arm member is rotated to the angle that restricts the rotation in the upright posture rotation direction, the locking point at the other end of the spring member is such that the rotational force applied to the arm member rotates the upright posture rotation from the wiping surface direction. It does not reach the moderation point that switches to the direction.
[0076]
The first locking portion and the second locking portion are respectively disposed at predetermined portions of the arm head having the above-described settings. As described above, when one end of the spring member is locked to the first locking portion, the wiper arm is set to have a lockback function, and when the one end of the spring member is locked to the second locking portion. Can be set so that the wiper arm does not have a lockback function.
[0077]
【The invention's effect】
As described above, according to the wiper arm and the wiper device according to the present invention, the wiper arm and the wiper device capable of setting the presence or absence of the lockback function can be set by selectively selecting the locking position of the spring formed on the arm head. Can be provided.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a wiper device according to an embodiment.
FIG. 2 is a perspective view of a wiper arm according to one embodiment.
FIG. 3 is an explanatory cross-sectional view illustrating a state in which a wiper arm of one embodiment is at a normal position.
FIG. 4 is an explanatory cross-sectional view illustrating a state in which the wiper arm according to the embodiment has been rotated to a moderation point position.
FIG. 5 is a cross-sectional view illustrating a state in which the wiper arm according to the embodiment has been rotated to a rotation restricting position.
FIG. 6 is an explanatory cross-sectional view illustrating a state in which the wiper arm according to the embodiment is at a normal position.
FIG. 7 is an explanatory cross-sectional view illustrating a state in which the wiper arm according to the embodiment has rotated to a rotation restricting position.
FIG. 8 is an explanatory diagram illustrating an arrangement of locking pins according to one embodiment.
[Explanation of symbols]
Reference Signs List 1 wiper arm, 2 glass surface, 3 motor, 4 link mechanism, 5 pivot shaft, 5a nut, 10 arm head, 10a groove, 12 mounting portion, 14 support portion, 16 stopper surface, 19a, 19b locking pin, 20 arm member , 21 retainer, 21a connecting portion, 21b contact portion, 22 arm piece, 22a locking portion, 24, 25 spring, 24a, 24b, 25a, 25b hook, 25c extension portion, 30 wiper blade, 62 hinge pin, 64 rivet , 66 rivet shaft, 68 spring guide, C locking point, L1, L2, E, S straight line, O rotation shaft center, W wiper device

Claims (6)

An arm head fixed to a pivot shaft rotatably supported on the vehicle body, one end connected to the arm head rotatably in a direction to come into contact with and separate from the wiping surface, and a wiper blade connected to the other end Arm member, and a wiper arm comprising a spring member having one end locked to the arm head and the other end locked to the arm member.
The arm head includes a first locking portion and a second locking portion in which one end of the spring member is selectively locked, and the arm member abuts on the arm member and stands up with respect to the arm head. Having a stopper surface that restricts rotation in the posture rotation direction by a predetermined angle or more,
The first locking portion is configured such that when one end of the spring member is locked to the first locking portion, the arm member rotates in the upright posture rotation direction and rotation is restricted by the stopper surface. When the spring member is pressed against the first locking portion, the spring force exceeds the detent point at which the rotational force applied to the arm member by the urging force of the spring member switches from the wiping surface direction to the direction away from the wiping surface. It is provided at a position where the other end of the member is located,
In the state where one end of the spring member is locked to the second locking portion, the arm member rotates in the upright posture rotation direction and the rotation is restricted by the stopper surface. The wiper arm is provided at a position where the other end of the spring member is located at a position that does not reach the moderation point with respect to the second locking portion. An arm head fixed to a pivot shaft rotatably supported on the vehicle body, one end connected to the arm head rotatably in a direction to come into contact with and separate from the wiping surface, and a wiper blade connected to the other end Arm member, and a wiper arm comprising a spring member having one end locked to the arm head and the other end locked to the arm member.
The arm head includes a first locking portion and a second locking portion in which one end of the spring member is selectively locked, and the arm member abuts on the arm member and stands up with respect to the arm head. Having a stopper surface that restricts rotation in the posture rotation direction by a predetermined angle or more,
The first locking portion and the second locking portion are a locking point between the other end of the spring member and the arm member when the arm member is not rotating in the upright posture rotation direction; A portion located on the wiping surface side with respect to a straight line S connecting an arm member to a rotation axis center O with respect to the arm head, and wherein the arm member is turned in the upright posture rotation direction and the stopper The first locking portion is closer to the pivot shaft than the straight line E connecting the locking point in a state where the rotation is restricted by the surface and the rotation shaft center O, and the second locking portion is A wiper arm provided on each of the portions located on the arm member side. The stopper surface is formed on an upper surface of the arm head located on an arc having a radius from a rotation axis center O of the arm member to the arm head to an end of the arm member on the arm head side. The wiper arm according to claim 1 or 2, wherein the wiper arm is a stepped portion. The rotation angle in the upright posture rotation direction from the wiping surface to a straight line L1 connecting the rotation axis center O of the arm member with respect to the arm head and the first locking portion is defined by the wiping surface, The rotation angle in the upright posture rotation direction up to a straight line L2 connecting the rotation axis center O and the second locking portion is set to be smaller than the rotation angle. Wiper arm. When the arm member is rotated in the upright posture rotation direction and the rotation is regulated by the stopper surface, the locking point between the other end of the spring member and the arm member is moved in the upright posture rotation direction. The wiper arm according to claim 3, wherein the stopper surface and the arm member are set to be in contact with each other in a range of a rotation angle between the straight line L1 and the straight line L2. A wiper device comprising the wiper arm according to any one of claims 1 to 5.

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