JP2515520Y2 - Wiper arm device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a wiper arm device, and more particularly to a wiper device effectively used for a wiper device for wiping a windshield of a vehicle such as an automobile.

[Conventional technology]

As a wiper arm device for a vehicle wiper device, for example, the one described in Japanese Utility Model Laid-Open No. 60-20952 is known. According to this wiper arm device, when the arm is lifted in the lockback direction, that is, in the direction away from the windshield, the stopper can maintain the arm in the lockback state. However, with this configuration, the stopper is designed to pop out by the biasing force of the spring, which complicates the work for mounting the mechanism for projecting the stopper by the biasing force of the spring, and also causes the stopper to constantly contact the arm shank. Since they are in contact with each other, abnormal noise is generated.

Therefore, in general, it is not possible to automatically hold the lockback state only by lifting the arm,
A manually operated wiper arm device is used in which the arm can be held in a lockback state by operating the operation unit after lifting the arm, the lockback mechanism is simple, and the assembling work is easy.

[Problems to be solved by the device]

However, in the conventional manually operated wiper arm device,
When operating the arm in the lockback state or releasing the arm, a crisp operation feeling cannot be obtained, resulting in poor operability.

An object of the present invention is to provide a wiper arm device that can obtain a crisp operation feeling.

[Means for solving the problem]

A wiper arm device according to the present invention comprises an arm shank (21) having a substantially U-shaped cross section, an arm (20) fixed to the tip side of the arm shank (21) and supporting a wiper blade, A support (22) whose one end is inserted into the base end of the arm shank (21) to rotatably support the arm shank (21) within a certain range, and a base end of the arm (20) and a support. A wiper arm device including a spring (29) stretched between the arm shank (21) and a spring (29) so as to urge the windshield in the direction of the windshield. A long hole (31) is formed near the armature shank (21) so as to extend in the longitudinal direction of the arm shank (21), and a pair of male engaging parts (32a) and (32b) are provided in the arm shank (21). Space in the longitudinal direction A stopper member (33) near the support (22) inside the arm shank (21), and a stopper member (38) provided on the outer surface of the arm shank (21). ) Through the elongated hole (31), and the end of the stopper (33) on the support (22) side is located between the ceiling wall of the arm shank (21) and the upper surface of the support (22). The stopper (33) is arranged so that it can be inserted into the formed gap (30).
a) and (41b) are arranged at both ends in the longitudinal direction, and a pair of female engaging portions (42a) and (42b) are formed inside the respective engaging portion pieces (41a) and (41b). Both female engaging portions (42a) and (42b) are formed so as to be able to engage with both male engaging portions (32a) and (32b) of the arm shank (21), respectively, and both engaging portions are engaged. Piece (41a), (4
The interval 1b) is set to be equal to the interval between the male engaging portions (32a), (32b).

[Action]

According to the above means, when the arm shank is lifted in the lockback direction to form a gap between the lower surface of the arm shank and the upper surface of the support, the knob member as the stopper operating portion is operated in the direction of the proximal end portion. Since the stopper is inserted between the arm shank and the support, the arm is held in the lockback state.

When releasing the lockback state, if the knob member is operated in the original direction, the stopper is pulled out from between the arm shank and the support, so that the arm is released from the lockback state.

In the above means, the male engaging portion and the female engaging portion are two.
Since they are arranged at both ends of the set and the stopper, engagement and disengagement operations occur at both ends of the stopper during the switching operation of the stopper, and interference with the arm shank due to the inclination of the stopper is prevented, resulting in crimping. You get a good clear click-stop action feel.

〔Example〕

FIG. 1 is an enlarged partial sectional view showing a pressed state of a wiper arm device according to an embodiment of the present invention, FIG. 2 is an enlarged partial sectional view showing an arm lifted state, and FIG. 3 shows an arm lockback state. An enlarged partial sectional view, FIGS. 4 and 5 are partially omitted front views and partially omitted partially cutaway bottom views showing the entire wiper arm device, and FIGS. 6 and 7 are VI-VI lines in FIG. And each enlarged partial cross-sectional view along the line VII-VII, FIG. 8 is an exploded perspective view showing the main part, FIG. 9 and FIG.
FIG. 10 is an explanatory view for explaining its action, and FIGS. 11 (a), (b), (c), and (d) are front views, rear views, bottom views, and side cross-sectional views showing a stopper. 12 (a),
(B), (c) is a front view, a plan view, and a side view showing a knob member.

In this embodiment, the wiper arm device according to the present invention comprises an arm 20, an arm shank 21, and a support 22. A wiper blade (not shown) is provided on the tip side of the arm 20.
Is fixed, and the base end side of the arm 20 is caulked and fixed to the tip end portion of the arm shank 21. The arm shank 21 has a substantially U-shaped cross section, and a support 22 is connected to an end of the arm shank 21 via a pin 23 as a rotation shaft. A recess 24 is formed at the tip of the support 22, and a pair of support portions 25 are formed on both sides of the recess 24. Both supports 2
A pin 27 is mounted between 5 and 25, and a hook 28 is rotatably engaged with the pin 27. One end of the tension spring 29 is locked at the tip of the hook 28,
The other end of 29 is locked to the base end side of the arm 20. As a result, the arm 20 is biased by the biasing force of the spring 29 in the direction in which it is pressed against the windshield (the direction opposite to the lockback direction). The upper surfaces 26, 26 of the supporting portions 25, 25 come into contact with the lower surface 21a of the ceiling wall of the arm shank 21 so that the arm shank 21 can rotate only within a certain range. When the arm 20 is lifted to lock it back, the lower surface 21a of the ceiling wall of the arm shank 21 and the upper surface 2 of the support portion 2
A gap 30 is formed between 6 and 26.

On both side walls of the arm shank 21, a pair of long holes 31, 31 are arranged to face each other, and are arranged in the vicinity of a line connecting a locking end of the spring 29 on the arm 20 side and a locking pin 27 of the hook 28. The arm shank 21 is opened so as to extend in the longitudinal direction. The long hole 31 has a length which is necessary for advancing and retracting the stopper described later with respect to the support portion of the support, and a width which is necessary for slidably supporting the slider described later. It is set. further,
A pair of male engaging portions 32a, 32b are provided on both side walls of the arm shank 21.
Are addressed to one set and are arranged on both sides of each long hole 31, 31 in the longitudinal direction,
Each is projected inward in a substantially convex spherical shape,
The male engaging portions 32a and 32b are configured to engage with a pair of female engaging portions described later.

Inside the arm shank 21, a stopper 33, which is integrally formed using synthetic resin, is slidably provided in contact with the ceiling wall in the vicinity of the support 22. A wedge portion 34 is integrally formed at the side end portion. The wedge portion 34 is inclined such that the end surface on the windshield side gradually separates from the windshield as it goes to the support 22 side, whereby the wedge portion 34 is locked on the lower surface of the ceiling wall of the arm shank 21 at the time of lockback.
It is adapted to be smoothly inserted into a gap 30 formed between 21a and the upper surfaces 26 of both support portions 25 of the support 22. Sliders 35, on the outer surfaces of both side walls of the stopper 33,
36 are arranged so as to extend in the longitudinal direction and project outwardly, respectively, and both sliders 35, 36 are a pair of long holes 31, 31 formed in both side walls of the arm shank 21, respectively. Is slidably inserted in the longitudinal direction.

In the installed state of the windshield of the wiper arm device, a knob mounting hole 37 is provided in the central portion of the slider 35 on the upper side so as to penetrate inward and outward, and the knob member is provided in the mounting hole 37. 38 split pin 40
Is inserted through the long hole 31. The knob member 38 is integrally formed by using the same resin as the stopper 33, has an oval (oval) shape in a plan view, and has a mountain-shaped cross section along its major axis. Further, a plurality of uneven portions 39 for slip prevention are provided on the main surface of the knob member 38 on the chevron side, extending along the minor axis, and concave portions and convex portions are alternately arranged in the major axis direction. Is formed. Knob member 38
On the main surface opposite to the chevron, a split pin portion 40 is provided at the center and protrudes at a right angle, and the split pin portion 40 has a knob member 38 abutted on the outer surface of the side wall of the arm shank 21. In the state, by penetrating through the long hole 31 and being inserted into the mounting hole 35 of the stopper 33, and engaging with the inner opening edge of the mounting hole 35,
The knob member 38 is mounted so as to move integrally with the stopper 33 across the arm shank 21.

A pair of engaging claw pieces 41a, 41b are provided on the side wall of the stopper 33, on which the knob member 38 is mounted, respectively, at both ends, and project from the slits 42a, 42b, respectively. . These slits 42a and 42b are engaged claw pieces 41
The pair of female engaging portions is substantially constituted by interposing the male engaging portions 32a and 32b of the arm shank 21 between the a and 41b and the side wall edges 33a and 33b of the stopper 33. It is like this. That is, the slit 42 as the female engaging portion
The width of the stoppers 33 in the sliding direction of a and 42b is substantially equal to the diameter of the male engaging portions 32a and 32b. Further, the width of the engaging claw pieces 41a, 41b in the sliding direction is determined by the stopper.
It is set as the amount of movement of 33, the length from the anti-support side end of the engagement claw portion 41a to the side wall edge 33b, and the length from the support side end of the engagement claw piece 41b to the side wall edge 33a. The length is substantially equal to the distance between the male engaging portions 32a and 32b of the arm shank 21.

 Next, the operation will be described.

When the support 22 is mounted so as to rotate integrally with a wiper arm drive shaft (not shown), and the wiper blade (not shown) supported by the arm 20 is brought into contact with the windshield, this wiper arm device is operated. The glass is ready to be wiped. At this time, as shown in FIG. 1, since the stopper 33 is positioned at a position away from the support 22, the stopper 33 is on standby at a position away from the support 22. In this standby state,
Of the female engaging portion of the stopper 33, a female engaging portion (wiping position female engaging portion) 42a formed of a slit located on the side opposite to the support 22
However, since the male shank 21 is engaged with the male engaging portion 32a on the side away from the support 22 of the arm shank 21, this standby state is reliably maintained.

By the way, since the arm 20 moves up and down along the curved surface of the windshield during the wiping operation of the wiper arm device, a slight gap is formed between the ceiling wall lower surface 21a of the arm shank 21 and the support portion upper surface 26 of the support 22. To be done. However, as described above, the stopper 33 is reliably held at the standby position by the engagement of the female engaging portion 42a and the male engaging portion 32a, so that the stopper 33 has a small gap during the wiping operation. There is no intrusion. Therefore, the wiping operation is stably performed.

When it is desired to shift the wiper arm device to the lockback state, first, as shown in FIG.
By raising 20 in the direction away from the windshield, a large gap 30 is formed between the ceiling wall lower surface 21a of the arm shank 21 and the support portion upper surface 26 of the support 22.

Subsequently, when the stopper 33 is slid to the left in FIG. 2 by applying the fingertip to the knob portion 38, the wedge portion 34 of the stopper 33 is inserted into the gap 30. At this time, the wiping position female engaging portion 42a of the stopper 33 is disengaged from the male engaging portion 32a of the arm shank 21, and at the same time, the female engaging portion (for the lockback position) located on the support 22 side is released. Female engaging portion) 42b is located on the support 22 side male engaging portion 3
Engage with 2b. Therefore, a strong click-stop action feeling can be obtained with respect to the sliding operation on the knob member 38. Therefore, the state in which the stopper 33 is inserted into the gap 30 between the arm shank 21 and the support 22 is known.

By the way, as shown in FIG. 9, in the case where only one set of the male engaging portion and the female engaging portion exhibiting the click stop action feeling is arranged on one side of the stopper 33 ', the stopper 33' When the switching operation is performed, the outer side portion 41c of the female engaging portion 42c on one side of the stopper 33 'is moved to the male engaging portion 32c.
The stopper 33 'tilts with respect to the arm shank 21' and interferes with the arm shank 21 ', so that the movement becomes worse. Therefore, the stopper
No. 33 'has crisp movements, and no clear click-stop action feeling can be obtained.

However, in this embodiment, two sets of the male engaging portion and the female engaging portion are provided at both ends of the stopper 33,
During the switching operation of the stopper 33, engagement and disengagement operations occur at both ends of the stopper 33, interference with the arm shank 21 due to the inclination of the stopper 33 is prevented, and a clear click-stop action feeling is obtained.

That is, as shown in FIG. 10, the stopper 33
At the time of switching operation of the stopper 33, the arm shank 21 of the stopper 33 is engaged on both sides of the stopper 33 because the engaging pieces 41a and 41b ride on the male engaging portions 32a and 32b at the same time.
To the arm shank 21. As a result, the stopper 33 does not interfere with the arm shank 21. Therefore, the stopper 33 moves smoothly with respect to the arm shank 21, so that a clear click-stop action feeling with good crispness can be obtained.

Then, when the lifted arm is gently lowered, as shown in FIG. 3, between the ceiling wall lower surface 21a of the arm shank 21 and the support portion upper surface 26 of the support 22,
The wedge portion 34 of the stopper 33 is sandwiched. Supporting the arm shank 21 by holding the stopper 33
Since the rotation of the arm 20 is restricted to a narrow range, the arm 20 is held in the lockback state.

At this time, the urging force of the spring 29 that presses the arm 20 against the glass is due to the lower surface of the ceiling wall of the arm shank 21.
21a, wedge portion 34 of stopper 33 and support portion 2 of support 22
It will be supported by the support 22 via 5, 25. Therefore, since the wedge portion 34 of the stopper 33 receives not the shear stress but the compressive stress, even the stopper 33 made of synthetic resin can sufficiently support the urging force of the spring 29.

After that, when the lockback state is released, first,
The arm 20 is once lifted, and a large gap 30 is formed between the ceiling wall lower surface 21a of the arm shank 21 and the support portion upper surface 26 of the support 22.

Then, in FIG. 3, when the slider 33 is slid to the right, the wedge portion 34 of the stopper 33 is retracted from the gap 30.

The lifted arm is then lowered and the first
As shown, the stopper 33 is an arm shank.
Since it is pulled out from between the support 21 and the support 22, the lockback state is released.

According to the present embodiment, by moving the knob member 38 attached to the stopper 33 along the side surface of the arm shank 21, it is possible to release the lockback and the lockback state, so that the transition operation to the lockback state is performed. Also, a simple operation is sufficient for both the transition operation to the release state and the operability.

Further, since the male engaging portion and the female engaging portion are arranged on both sides of the stopper, it is possible to obtain a crisp click stop action feeling.

Since the stopper and the knob member are integrally formed of resin, it is possible to avoid the generation of rust due to electrolytic corrosion. Further, according to the present embodiment, the long hole 31 and the male engaging portions 32a, 3
2b are symmetrically provided on both side walls of the arm shank 21, and the stopper 33 has a symmetrical shape in the front and rear in the sliding direction.
Even if it is necessary to provide it on another side wall, it is convenient to simply change the direction of the stopper 33.

Needless to say, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

For example, the female engaging portion is not limited to the slit, but may be a groove or a hole.

[Effect of device]

As described above, according to the present invention, the lockback and the unlocking operation are the operations of sliding the stopper in the longitudinal direction, and the click-stop action feeling with good crispness is obtained, so that the operability is good. Further, the lockback state and the released state thereof are created by advancing and retracting the gap between the arm shank and the support of the stopper, so that the lockback state can be easily and reliably obtained when desired. A pair of male engaging portions (32a), (32b), a pair of female engaging portions (42a), (42b) and an engaging portion piece (41a),
By disposing the (41b) symmetrically on both sides of the stopper (33), both engaging part pieces (41a), (on both sides of the stopper (33) at the time of switching operation of the stopper (33). Since 41b) rides on both male engaging parts (32a), (32b) at the same time, the stopper (33) can be prevented from tilting with respect to the arm shank (21), and as a result, the stopper (33) can be prevented. ) Is arm shank (21)
It is possible to avoid interfering with. Therefore, since the stopper (33) moves smoothly with respect to the arm shank (21), it is possible to create a crisp and clear click-stop action feeling.

[Brief description of drawings]

FIG. 1 is an enlarged partial sectional view showing a pressed state of a wiper arm device according to an embodiment of the present invention, FIG. 2 is an enlarged partial sectional view showing an arm lifted state, and FIG. 3 shows an arm lockback state. Enlarged partial sectional view, FIG. 4 and FIG.
The figure shows a partially omitted front view and a partially omitted partially cutaway bottom view showing the entire wiper arm device, and FIGS.
Each enlarged partial sectional view taken along the line VI-VI and line VII-VII in the figure, FIG. 8 is an exploded perspective view showing the main part, FIG. 9 and FIG.
FIG. 10 is an explanatory view for explaining its action, and FIGS. 11 (a), (b), (c), and (d) are front views, rear views, bottom views, and side cross-sectional views showing a stopper. 12 (a),
(B), (c) is a front view, a plan view, and a side view showing a knob member. 20 …… Arm, 21 …… Arm shank, 21a …… Underside of ceiling wall, 22 …… Support, 23 …… Pin, 24 …… Recess, 25…
… Support part, 26 …… Support part top surface, 27 …… Pin, 28 …… Hook, 29 …… Tensile spring, 30 …… Gap, 31 …… Oblong hole,
32a, 32b ... Male engaging portion, 33 ... Stopper, 34 ... Wedge portion,
35, 36 ... Slider, 37 ... Mounting hole, 38 ... Knob member, 39 ... Uneven portion, 40 ... Split pin portion, 41a, 41b ... Engaging piece, 42a, 42b ... Female engagement Part (slit).

Continuation of front page (72) Inventor Junichi Teraoka 1-4-1 Chuo, Wako-shi, Saitama Inside Honda R & D Co., Ltd. (56) References JP-A-60-206755 (JP, A) JP-A-62-268757 (JP, A) Actual Kaihei 2-26962 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. An arm shank (21) having a substantially U-shaped cross section, and an arm (20) fixed to the tip side of the arm shank (21) to support a wiper blade.
And a support (22) whose one end is inserted into the base end of the arm shank (21) to rotatably support the arm shank (21) within a certain range, and the base end of the arm (20). A wiper arm device comprising a spring (29) stretched between the support and a support (22) so as to urge the windshield in the direction of the windshield, wherein the side wall of at least one side of the arm shank (21). A long hole (31) is formed in the vicinity of the support (22) so as to extend in the longitudinal direction of the arm shank (21), and a pair of male engaging portions (32a) and (32b) are provided in the arm shank ( 21) It is provided so as to project inward at intervals in the longitudinal direction, and a stopper (33) is provided inside the arm shank (21) in the vicinity of the support (22) on the outer surface of the arm shank (21). Disposed knob member (38) The end of the stopper (33) on the support (22) side is formed between the ceiling wall of the arm shank (21) and the upper surface of the support (22). The stopper (33) further includes a pair of engaging part pieces (41).
a) and (41b) are arranged at both ends in the longitudinal direction, and a pair of female engaging portions (42a) and (42b) are formed inside the respective engaging portion pieces (41a) and (41b). Both female engaging portions (42a) and (42b) are attached to the arm shank (2
The male engaging portions (32a) and (32b) of 1) are formed so as to be engageable with each other, and both engaging portion pieces (41a) and (41
A wiper arm device characterized in that the distance b) is set to be equal to the distance between the male engaging portions (32a), (32b).