JPS6345989B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wiper device used in small vehicles such as scooters, motorcycles, and tricycles.

Conventional technology and problems to be solved In recent years, in terms of energy saving and improving driving performance,
Significant progress has been made in reducing the weight of small road vehicles such as motorcycles, and the development of new materials and thinning of parts is remarkable.

Windshields are no exception.
There is also active development of glass plate thickness reduction and resin materials.

Typical wipers require a certain amount of blade pressing force when driving to wipe away water and dust adhering to the windshield.
It remains crimped to the shield, so if it is not used for a long period of time or if the external temperature changes drastically,
There were cases where the blade stuck and the blade material deteriorated.

In particular, if the windshield is made of resin material, the focus is on whether or not scratches occur when the wiper is in use, and if the blade is left in close contact with the windshield surface when the wiper is not in use and stored, it may cause vibrations in the vehicle body, etc. Occasionally, scratches may occur in that area.

In addition, in the wiper device described in JP-A-55-160637, in order to prevent the wiper from lifting due to wind pressure during high-speed driving, a piston is linked to the arm pressure adjustment section, and the piston is used as a pressure source. A vacuum pump and a hydraulic device are used, and as a result, a separate vehicle speed detection section is required, resulting in a complicated structure, which has the disadvantage that a compact and inexpensive wiper device cannot be obtained.

Means for Solving the Problems and Effects The present invention relates to an improvement of a wiper device that eliminates such inconveniences, and includes a blade, an arm that presses and supports the blade against a windshield, and a motor that drives the arm. In the wiper device, the wiper is directly connected to the motor, and the relative position of the motor casing with respect to the windshield can be manually manipulated so that the position of the motor casing with respect to the windshield can be changed. The windshield is attached to a surface pressure adjusting operation means that can be fixed at the same time, the radius of curvature of the upper normally operating range of the windshield is large, and the radius of curvature of the lower retracting range thereof is formed to be small, and the wiper A surface pressure of the wiper against the windshield is increased when the wiper is located in the lower storage range, and a surface pressure of the wiper against the windshield is decreased when the wiper is located in the lower storage range. .

In the present invention, since the wiper blade is configured as described above, by manually operating and fixing the surface pressure adjustment operation means so as to position it in the upper normal operating range of the windshield, the wiper blade can be adjusted to The windshield is strongly pressed against the surface of the windshield within its normal operating range where it has a large radius of curvature and is slid, and rainwater, muddy water, dust, etc. adhering to the windshield are reliably removed.

Further, in the present invention, the wiper blade is curved into a shape close to its free state by manually operating and fixing the surface pressure adjustment operating means so as to position it in the lower storage range of the windshield. Since the wiper blade gently contacts the surface of the windshield within the lower storage range where the radius of curvature is small, the wiper blade is not subjected to excessive deformation or stress, and its durability is significantly improved.

Furthermore, in the present invention, the wiper is directly connected to the motor, and the casing of the motor is attached to the surface pressure adjustment operation means, so that the structure is significantly simplified and compact.
Significant cost reductions are possible.

Embodiment The illustrated embodiment in which the present invention is applied to a scooter-type motorcycle as shown in FIG. A windshield 3 is attached to the handle 2 so that it can sufficiently withstand the wind pressure etc. that accompanies driving.
is firmly attached.

Also, among the handles 2, the left handle (first
A wiper unit base 5 is arranged adjacent to the wiper unit base 5 (on the front side in the figure), and a motor case 8 with a built-in motor 7 is fitted into the base cover 6 of the base 5 so that it can rotate around the longitudinal direction of the vehicle body. A cam groove 10 is formed on the outer peripheral surface of the sleeve portion 9 of the motor case 8, and a cam pole 11 that engages with the cam groove 10 is provided protruding from the base 5. Therefore, the windshield 3 has a hole 4 into which a wiper shaft 17 described later can fit.
is provided.

Further, a manual dial 12 is integrally fitted to the base end of the motor case 8, and lock cams 13 are formed on the outer periphery of the manual dial 12 at equal intervals in the circumferential direction.
A lock bead 15 is fitted into the wiper unit base 5 so as to be able to engage with the lock cam 13 with a force of 4, and a lock button 16 is integrally protruded laterally from the lock piece 15.

Furthermore, a wiper head 18 is fixed to the tip of the wiper shaft 17 which is oscillated and rotated by the motor 7 over a required angle range.
A wiper arm 19 is pivotally connected to the wiper head 8 via a pin 20, and a wiper blade 21 having a normal structure is pivotally attached to the tip of the arm 19 via a pin 22.
An arm spring 23 is stretched between 9 and 9,
The wiper blade 21 is pressed against the windshield 3 by the elasticity of the arm spring 23.

As shown in FIGS. 2 to 4, the windshield 3 has a normal operating range X, which has a large radius of curvature and is close to a flat surface, located above, and a storage range Y, which has a small radius of curvature, located below. As such, it is formed.

Since the embodiment shown in FIGS. 1 to 9 is constructed as described above, the lock piece 15 is engaged with the on-lock cam 13X of the manual dial 12 as shown in FIGS. 5 to 7. , when set to the on state, the cam pole 11
The motor case 8 and the sleeve part 9 are retracted rearward by the cam group 10 engaged with the eighth
As shown in the figure, the wiper blade 21 is strongly pressed against the front surface of the windshield 3, and the motor 7, wiper shaft 17, wiper arm 19, and wiper blade 21 are also rotated clockwise in FIG. The wiper blade 21 is positioned in the normal operating range X. In conjunction with this on operation of the manual dial 12, the power of the motor 7 is turned on, and the wiper arm 19 and the wiper blade 21 are oscillated and reciprocated within the normal operating range X around the wiper shaft 17, and the front surface of the windshield 3 is is wiped away.

Conversely, press down on the lock button 16, remove the tip of the lock piece 15 from the on-lock cam 13X, turn the manual dial 12 half a turn,
When the lock piece 15 is locked to the off-lock cam 13Y of the manual dial 12 and set to the OFF state, the sleeve portion 9 projects forward by the cam group 10 locked to the cam pole 11, as shown in FIG. At the same time, the wiper blade 21 is weakly pressed toward the front of the windshield 3, and the motor 7, the wiper shaft 17, the wiper arm 19, and the wiper blade 21 are also rotated counterclockwise in FIG. 2, and the wiper blade 21 is retracted. It is located in range Y. In conjunction with this off operation of the manual dial 12, the power to the motor 7 is cut off, and the wiper arm 19 and wiper blade 21 are stopped in the storage range Y.

As described above, in the above embodiment, when the wiper is operated, the motor case 8 and the sleeve portion 9 retract rearward as shown in FIG.
Due to the extension of the arm spring 23, the wiper blade 21 is strongly pressed against the front surface of the windshield 3.
The radius of curvature of the shield 8 increases and becomes a curved surface that is close to a flat surface, and the wiper blade 21 becomes close to a straight line and the amount of elastic deformation of the yoke 24 increases, so that it adheres to the front surface of the windshield 3 in the normal operating range X. Rainwater, muddy water, dirt, and dust are reliably removed by strong wiping with the wiper blade 21.

Furthermore, when the wiper is retracted, the Morse case 8 and the sleeve portion 9 protrude forward as shown in FIG. 9, and the compressing arm spring 23 reduces the pressing force of the wiper blade 21 acting on the front surface of the windshield 3. Therefore, even if the wiper is not used for a long period of time or the outside temperature changes drastically, the wiper blade 21 will not close to the windshield.
There is no sticking to the front surface of the shield 3, and there is no deterioration of the blade material. Then, the radius of curvature of the windshield 3 in the storage range Y becomes smaller, resulting in a significantly curved surface, and the amount of elastic deformation of the yoke 24 becomes smaller, so the wiper blade 21 uniformly winds the windshield in a state close to the shape left freely. - The wiper blade 21 can come into contact with the surface of the windshield 3, and the wiper blade 21 will not be deformed. Moreover, even when the wiper blade 21 is not in use and is stored, the wiper blade 21 can stably contact the surface of the windshield 3 over its entire length, and the wiper arm 19 and Shaking of the wiper blade 21 is prevented.

Furthermore, if the tension of the arm spring 23 is too strong or if you want to reduce the surface contact force of the windshield 3 when the wiper is operated, install the lock piece 15 on the half-on lock cam 13Z between the on-lock cam 13X and the off-lock cam 13Y. The motor 7 may be locked, and even in this state, the motor 7 is driven to rotate, and the motor case 8 and wiper head 18 are turned on and off as shown in FIG.
The motor case 8 and the wiper head 18 are moved backward by half of the longitudinal stroke W compared to when they are stored, and the desired purpose is achieved.

[Brief explanation of the drawing]

FIG. 1 is a side view of a scooter-side motorcycle equipped with an embodiment of the wiper device for small vehicles according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is the same as that shown in FIG.
FIG. 4 is a vertical sectional view taken along the line, FIG. 4 is a view taken in the direction of the - arrow in FIG. 3, FIG. Figure 7 is a cross-sectional view taken along the - line in Figure 5;
FIGS. 8 and 9 are cross-sectional views taken along the lines --, -- in FIG. 2. 1... Front body, 2... Handle, 3... Windshield, 4... Hole, 5... Wiper unit base, 6... Base cover, 7... Motor, 8... Motor case, 9... Sleeve part, 10... Cam group, 11 ...Cam pole, 12...Manual dial, 13...Lock cam, 14...Compression coil spring, 15...Lock piece, 16...Lock button, 17...Wiper shaft, 18...Wiper head,
19...wiper arm, 20...pin, 21...wiper blade, 22...pin, 23...arm spring, 24...yoke.

Claims (1)

[Claims] 1. A wiper device comprising a blade, an arm that presses and supports the blade against a windshield, and a motor that drives the arm, wherein the wiper is directly connected to the motor, and a casing of the motor is configured to control its position relative to the windshield. the curvature of the upper normal operating range of the windshield; The radius of curvature is large and the radius of curvature of the lower storage range is small, and when the wiper is located in the upper normally operating range, the surface pressure against the windshield is increased, and the wiper is located in the lower storage range. A wiper device for a small vehicle, characterized in that the surface pressure of the wiper against the windshield is reduced when