JPH07304430A - String type wiper device preventing freezing - Google Patents

Abstract

PURPOSE:To effectively prevent the freezing of the moisture stuck on the surface of a mirror and the moisture infiltrating into a mirror body by arranging a heater between the mirror body and a mirror main body in a wiper device using a string as a wiping member. CONSTITUTION:An endless circular circulating belt 26 is wound on a pulley train arranged along the periphery of a mirror body 3', one end of a string 27 movably provided near to the surface of a mirror is fitted to the circulating belt 26, and the surface of a mirror main body 4 made of a reflecting mirror is wiped by the string 27 when the circulating belt 26 is circularly rotated. A heater 51 is arranged between the mirror main body 4 and the mirror body 3' fixed with the mirror main body 4 in this wiper device. The electric heater 51 is preferably fitted in close contact with the back face of the mirror main body 3'. Such possibility is resolved that a moving member is frozen or the surface of the mirror main body 3' is covered with ice to impair the reflecting function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle outside mirror wiper device having a structure in which a string is used as a wiping member, and water adhering to the reflecting surface of the mirror body or water entering the inside of the mirror body. It has been improved so as to prevent freezing. However, prevention of freezing includes both prevention of freezing and melting of frozen ice.

[0002]

2. Description of the Related Art FIG. 5 is a front external view of a vehicle outside mirror provided with a wiper device according to a conventional example. The mirror body 4 is fixed to the mirror body 3, and the mirror body 4 is supported by the mirror housing 12 via the mirror body 3. A mirror base 23 is used by being fixed to the vehicle body, and the mirror base 23 supports the mirror housing 12. The mirror housing 1
A wiper arm shaft 21 is provided so as to pass through 2 and a wiper arm 24 is attached to the wiper arm shaft 21. When the wiper arm shaft 21 rotates back and forth,
The wiper arm 24 supports the wiper blade 29 and tilts reciprocally, and the wiper blade 29 slides and wipes the surface of the mirror body 4. In the conventional mirror wiper device shown in FIG. 5, the wiper arm 24 and the wiper blade 29 appear in appearance even while the wiper operation is stopped, so that the appearance is poor and the commercial value is lowered. Now, temporarily, the eaves-shaped wiper accommodating portion 20 is provided above the mirror housing 12.
By providing (shown in phantom), the wiper blade 29 can be stored and hidden, but the wiper arm 24 cannot be hidden. Furthermore, the wiper arm 24 and the wiper blade 29
Is a member having a large inertia among the constituent members of the wiper device. Reciprocatingly driving such a member having a large inertia easily causes noise (operation sound is generated if there is looseness). In order to solve the above-mentioned inconvenience, it is conceivable that the string-shaped member is slid along the surface of the mirror main body and the wiping action is performed by the string-shaped member. Since the string-like member has a small inertia, the required driving force is small, and when the wiper operation is stopped, the string-like member is brought close to one corner of the mirror main body, and the appearance is hardly damaged. The string-type mirror wiper device is an unknown device (Japanese Patent Application No. 4-82047 / mirror wiper device) filed separately by the present applicant. For convenience of explanation, the device will be abbreviated as the device of the prior application. FIG. 6 is a front view showing an embodiment of an unknown prior art wiper device for a mirror, with a part thereof broken away. The mirror body 4 is fixed to the mirror body 3. The reflecting mirror which is an optical component is sometimes called a mirror, and the entire assembly using the reflecting mirror is sometimes called a mirror. Therefore, in the present invention, a single reflecting mirror which is a component is a mirror body. , And the assembly is called a mirror device to distinguish them. On the back side of the mirror body 3, locate it around it 1
The drive pulley 22 and the three idler pulleys 25 are arranged, and an endless annular revolving belt 26 is wound around these four pulleys. A string 27 is stretched in close contact with the surface of the mirror body 4, one end 27a of which is in contact with the edge of the mirror body 4 (depicted by a hidden line), wraps around the back side of the mirror body, and is attached to the loop belt 26. Has been. FIG. 7 is a schematic cross-sectional view showing both ends of the string in the above embodiment, (A) shows a state in which one end of the string is attached to a loop belt, and (B) shows the string. The other end is depicted attached to a tensioner and under tension. Pulley 22 shown in FIG.
6 is a drive pulley described above with reference to FIG. 6, which is rotated by a motor (not shown) via the transmission belt 17 and rotates the loop belt 26 wound around the belt. One end 27a of the string 27 is fixed to the loop belt 26. In FIG. 6, the pulley 22 is rotated in the direction of the arrow a, and the revolving belt 26 is revolved as indicated by arrows b and c. String 2 attached to the loop belt 26
One end 27a of 7 is moved in the direction of arrow b, and 27
It is the a'position. Along with this, the string 27 at the position drawn by the solid line reaches the 27 'position shown by the chain line until the arc arrow d.
It is drawn around and tilts. As can be easily understood from FIG. 6, the linear portion of the string 27 '(chain line) is longer than the linear portion of the string 27 (solid line). Therefore, the tensioner 2 which gives a certain tension so that this string will not be loosened or torn.
8 are provided. (This tensioner 28 is shown in both FIG. 6 and FIG. 7B, but in FIG. 7B, the central portion is broken and cut and drawn.) The tensioner 28 described above includes the string 2 in the elongated cavity (pipe) 28a.
The other end 27b of 7 is drawn in. 28
Reference numeral b is a tensioner coil spring that applies a force in a direction in which the string 27 is drawn into the conduit 28a. The string 27 is wiped off while being slid along the surface of the mirror body 4 while being kept at a substantially constant tension while being drawn out from the inlet 28c of the tensioner or drawn in from the inlet 28c. .

One end of the string 27 is the revolving belt 2
6 is attached to the point 6 (for example, point 27 shown in FIG. 6).
a, 27a ′) revolves together with the revolving belt 26. Then, this point is near the tensioner 28c (for example, the point e).
When the circling belt 26 is stopped when the vehicle comes to, the string 27 also stops and disappears from the appearance. The reason is that it is hidden by the eaves-shaped portion 3a shown in FIG. 7 (B). Further, in this state, most of the string 27 is pulled into the tensioner 28, and the tip end thereof is at the stroke end 2
Reach 7c. By the time one end 27a of the string at the point e moves in the directions of the arrows b and c with the rotation of the revolving belt 26 and reaches the point f, almost the entire surface of the mirror body 4 (shown in appearance). String 2
It is wiped by 7, and no unwiped portion is generated.

In the wiper device according to the invention of the prior application shown in FIG. 6, the tensioner 28 for applying a substantially constant tension to the strinze 27 utilizes compression / expansion of the coil spring 28b. According to this configuration, the tension applied to the string 27 is substantially proportional to the amount of strain of the coil spring 28 b, and as the string 27 is pulled out from the tensioner 28, the tension increases, and the string 27 is drawn into the tensioner 28. As the tension is reduced, the tension decreases, and the tension applied to the string varies relatively. When the tension of the string fluctuates, the load of a motor (not shown) that rotationally drives the revolving belt 26 fluctuates, and unless the motor has a large capacity, the operation is not smoothly performed. In order to prevent the above-mentioned problems (fluctuation of string tension), coil spring 2
It is effective to use a spring type spring instead of 8b. That is, the structure of the string tensioner (a) is rotatably supported by the drum shaft, and one end of the string is attached to wind the string in and out, and a string winding drum,
(B) If the outer peripheral end is attached to the string winding drum and the inner peripheral end is formed of a mainspring spring attached to the drum shaft, fluctuations in the tension of the string are significantly reduced. According to the above configuration, the inner peripheral end of the mainspring spring is attached to the drum shaft, and the outer peripheral end of the mainspring spring is attached to the winding drum. Therefore, when the string wound around the winding drum is pulled out, ,
The mainspring spring is deformed so as to be tightly wound, and the elastic restoring force gives tension to the string. As compared with the rate of change of the spring load with respect to the change of the length of the coil spring, the rate of change of the spring load with respect to the change of the rotational angle position of the main spring is extremely small. Very little change and almost constant tension is applied. Therefore, the load of the drive motor does not fluctuate, and smooth operation can be performed even with a small capacity drive motor. Even if the winding drum is omitted by simplifying the above configuration and the end portion of the string is attached to the outer peripheral end of the main spring, the same effect (reduction of tension fluctuation) can be obtained. The above configuration (tensioner using a spring) is an unknown invention (Japanese Patent Application No. 5-335127 / string type wiper device), which is separately applied for by the present applicant. For convenience of explanation, the invention is referred to as a prior invention.

Next, an embodiment of the invention of the prior application will be described with reference to FIGS. FIG. 8 is a partially cutaway front view showing one embodiment of a string type wiper device according to the invention of the prior application. In the wiper device for a mirror according to the prior application shown in FIG. 6 described above, the revolving belt 26 is wound around four pulleys, but in this embodiment, seven idler pulleys 25 and one drive are used. Pulley 2
2'is provided and the belt 26 is wound around. The drive pulley 22 'is rotated by a drive gear 33a, which is rotated by a motor (not shown), through intermediate gears 33b and 33d and a driven gear 33d. The driven gear 33d and the drive pulley 22 'are fixed concentrically with each other. One end 27 a of the string 27 is attached to the loop belt 26. The other end of the string 27 is wound around a string tensioner 35 having a string winding drum 35a and is given a substantially constant tension. FIG. 9 shows CC of the string tensioner provided in the embodiment shown in FIG. 8 above.
FIG. The joint ball 32c is fixed to one end of the string 27 which is a wiping member, while the joint bracket 32d is attached to the revolving belt 26, and the joint ball 32c is attached to the joint bracket 32d. A portion 27b near the other end of the string 27 is attached to and wound on the string winding drum 35a. The drum shaft 35b rotatably supporting the above-mentioned string winding drum 35a includes the drum cover 3
5c is integrally connected to and fixed to the mirror body 3 '. Reference numeral 35e is a slit provided on the drum shaft 35b. 35d is a mainspring. The mainspring is a spring that was widely used as the power of mechanical hand-wound watches and toys in the past,
It is a known member also described in the dictionary. The inner peripheral end of the mainspring spring is engaged with the slit,
The outer peripheral end of the mainspring spring is attached to the string winding drum 35a. Prior to attaching the other end side of the string 27 to the string winding drum 35a, the string winding drum 35a is rotated in advance so as to be bent in a direction of increasing the spiral winding number of the mainspring 35d ( If the so-called mainspring is wound, the string winding drum 35d will be rotated by the elastic restoring force of the mainspring spring 35d, and the other end side 27b of the string 27 will be wound to give a substantially constant tension. Acts like. FIG. 10 is an exploded perspective view in which main components involved in the action of rolling in a string to apply tension are extracted from the components shown in FIG. 9 described above. 11A and 11B are shown to explain the operation and effect of the above-described embodiment, and FIG. 11A shows the string winding length and the string tension (that is, the spring) in the coil spring used in the string wiper according to the prior application. And (B) is a chart showing the relationship between the string winding length and the string tension (spring load) in the mainspring used in the invention of the earlier application. In the coil spring of the invention of the prior application shown in FIG. 11A, the string tension changes by the illustrated force F ₁ depending on the change dimension L of the winding length of the string. Here, F ₁ / L is a spring constant. In contrast, the spring spring of the invention of the earlier application shown in FIG. 11B has a small spring constant F ₂ / L, and the amount of change in string tension F ₂ even if the winding dimension L of the string changes.
Is much smaller. That is, the tension of the string 27 is kept substantially constant.

As shown in FIG. 5, the macro structure of the vehicle outside mirror, which is a target device to which the wiper device is attached, is such that the mirror base 23 is fixed to the vehicle body and the mirror housing 12 is supported by the mirror base 23. To be done. On the other hand, a mirror body 4 is fixed to a mirror body (called a mirror holder) 3. In some cases, the mirror body 3 is fixedly mounted on the mirror housing 12, and the mirror body 3 is tiltably supported by the mirror housing 12 and can be remotely controlled from the driver's seat. There is also an example that can be tilted by. The wiper device according to the invention of the prior application or the invention of the prior application has the above-described two methods (mirror body fixing, mirror body tilting remote control).
It can be applied to any of the above. In any case, there is an advantage as a string type wiper device. FIG. 12 is a cross-sectional view showing a drive system of the wiper device when a string-type wiper device is attached to a remote control type outside mirror, and is a cross section taken along a plane perpendicular to the mirror body. A mirror body 3 to which a mirror body 4 is fixedly mounted is tiltably supported by a mirror housing 12 via a ball joint 2. A drive unit for remote control is installed in the mirror housing 12. Reference numeral 1 is a housing of the drive unit. Reference numeral 22 shown in FIG. 12 is the driving pulley described above with reference to FIG. 6, and reference numeral 26 is the revolving belt. Reference numeral 19 is a pulley shaft of the pulley 22. A drive motor (not shown) is provided in the drive unit housing 1.
Is installed and drives the worm wheel 13b to rotate via the worm 13a. The wall wheel 13b is integrally connected to the drive shaft 14, and the transmission shaft 15 is connected to the drive shaft 14 so as to be slidable in the axial direction and non-rotatable around the axis. ing. The transmission shaft 15 is rotated by the drive motor (not shown), and the drive pulley 22 is rotated via the pulley 16 with the universal joint and the transmission belt 17. The drive pulley rotates the revolving belt 26. Figure 1
FIG. 3 is an enlarged view showing a detail of the portion A surrounded by a chain line circle in FIG. 12 and partially cut. The pulley 16 with a universal joint is a mirror body 3
A rotary shaft 16a rotatably attached to the rotary shaft, a pulley 16b fixed to the rotary shaft, and the pulley 16b.
And a universal joint 16c attached to the universal joint 16c, which is connected to the transmission shaft 15 described above with reference to FIG. The pulley 16b is wound around the transmission belt 17 shown in FIG. 12 and drives it.

The invention of the prior application described above with reference to FIGS. 5 to 13 and the string-type wiper device of the invention of the prior application each have a structure in which one end of the string is attached to the revolving belt. As a result, when the string is not in the wiping operation, the effect that the constituent members for wiping do not appear in the appearance and that the wiping can be done without leaving the wiping to every corner of the mirror body. As a string-type wiper device having a configuration different from the above, a string is attached to a wiper arm similar to the wiper arm in the conventional wiper device to perform a wiping operation (that is, the wiper blade attached to the wiper arm is replaced by the string). It is possible. With such a configuration, the wiper arm is provided, so the effect of being inconspicuous at rest is not obtained, but the structure is simple and there is no wiping left on every corner of the mirror surface, and it adapts well to the curved surface of the mirror body. There is an effect that can be.
FIG. 14 is a front view for explaining the configuration and operation of a string-type wiper device having a structure including a wiper arm.
Hereinafter, this device will be referred to as an unknown prior art string-type wiper device (abbreviation: prior art). Reference numeral 41 is a mirror body to which a mirror body 42 is fixed. The reflective surface of the mirror body 42 is exposed at the front opening 41a of the mirror body. FIG. 15 is a cross-sectional view of a string type wiper device including the wiper arm shown in FIG. 1 above. A wiper arm 44 is installed on the mirror body 41. In this example, it penetrates the mirror body 42 and projects to the surface thereof. This wiper shaft 43 is
It can be reciprocally rotated by a driving means (not shown). The wiper arm 44 has its base end attached to the wiper shaft 43 and can be tilted reciprocally as indicated by reciprocating arc arrows d and d ′ shown in FIG. The wiper arm 44 of this example is a type that can be expanded and contracted, and an expansion rod 44b is slidably fitted in a cylinder 44a on the base side. A guide ball 4 is attached to the tip of the expandable rod 44b.
4c is fixed, and as shown in FIG. 15, a guide groove 41b formed along the edge of the opening 41a of the mirror body 41 guides the guide ball 44c. As a result, as indicated by the phantom line in FIG.
The telescopic rod 44b expands and contracts with the tilting of the. As shown in FIG. 15, the string 27 is fixed near the tip of the expandable rod 44b. The string 27 is routed in contact with the surface of the mirror body, and passes through the tensioner inlet 45 to the inside of the mirror body 41 as shown in FIG. 14 (the inside of the mirror body means between the mirror body and the mirror body 42). The other end of the string 27 is attached to a tensioner and is given a substantially constant tension. Although the tensioner is hidden by the mirror main body 42 in FIG. 14, it has the same or similar structure as in FIGS. 9 and 10 (the invention of the prior application). With the above configuration,
In the string-type wiper device according to the prior art shown in FIGS. 14 and 15, the string 27 slides along the surface of the mirror body 42 as the wiper arm 44 reciprocally tilts to perform a wiping operation.

[0008]

In the unexplained string wiper device according to the invention of the prior application, the invention of the prior application, and the prior art described above, (a) the mirror body and the string are exposed, Being exposed to wind and snow, rain dew, and (b) car wash water and rain and snow may enter the mirror body and wet the inside of the tensioner. Have in common. If the water adhering to the surface of the mirror body freezes, the function as a reflecting mirror is hindered, and the reflected image at the rear becomes difficult to see. These problems also occur when snow adheres or when frost forms on the surface of the mirror body. In particular, in the string type wiper device, there is a possibility that the string freezes on the mirror body and the operation of the wiper is hindered or the string is damaged. Also,
If the water that has entered the tensioner freezes, the wiper operation is hindered. The present invention has been made in view of the circumstances described above, and an object thereof is to provide a string-type wiper device capable of preventing various troubles related to freezing of water.

[0009]

The basic principle of the present invention, which was created to achieve the above object, is to provide a heater to prevent frost formation or to melt frost formation. However, in order to perform effective heating, the installation location of the heater is specified as "between the mirror body and the mirror body". An electric heater is convenient as the above heater, but in the present invention, the heater is a general term for heating means,
The heater is not necessarily limited to the electric heater. In order to achieve the above object based on the principle described above,
According to the first aspect of the invention relating to the wiper device, a plurality of pulleys are arranged along the periphery of the mirror body fixed to the mirror body, and the endless annular belt is wound around the plurality of pulleys. One end of the string movably arranged near the surface of the mirror body is attached to the revolving belt, and the other end of the string is attached to the tensioner to apply tension so that the string can be extended and retracted. A wiper device, wherein a heater is provided between the mirror body and the mirror body,
The mirror body, the member arranged between the mirror body and the mirror body, and the string are configured to be heated to prevent freezing of water adhering to the mirror surface or water entering the mirror body. It is characterized in that it can be done.

The structure of the second invention created by applying the above-mentioned principle to an unknown prior art having a wiper arm is as follows.
The mirror body includes a wiper shaft mounted so as to be capable of reciprocating rotation with respect to a mirror body, reciprocatingly rotating the wiper shaft, and a wiper arm fixed to the wiper shaft for tilting reciprocally. One end of a string movably arranged near the surface of the mirror body is attached to the tip of the wiper arm, and the other end of the string is attached to a tensioner to apply tension so that the string can be extended / retracted. A wiper device, wherein a heater is provided between the mirror body and the mirror body, and the mirror body, a member provided between the mirror body and the mirror body, and a string Is designed to be able to heat the surface of the mirror to prevent water from adhering to the mirror surface and freezing of water separated from the water entering the mirror body. The features.

[0011]

According to the above-mentioned means, since the heater is installed between the mirror body and the mirror body, there is no fear that the heater will appear in the appearance and impair the design value, and the mirror body and the mirror body will not be damaged. Since it is housed between the body and the body, there is no risk of contact with external obstacles and damage even if no special protection means is provided. Further, in the string type wiper device, since the constituent members that are easily affected by the icing are arranged between the mirror body and the mirror body or near the mirror body and the mirror body, the heater is used for the mirror body and the mirror body. Since the above-mentioned "components that are easily damaged by icing" can be effectively heated by installing between them, thermal efficiency is good and energy consumption is low. Further, for the same reason, the thawing of the frozen and frozen component members can be rapidly advanced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to FIGS.
An example of the present invention will be described. FIG. 1 shows an example improved by applying the first invention to a string type wiper device according to the invention of the earlier application and the invention of the earlier application. A mirror body to which a mirror body is fixed and a part of a mirror housing are cut. It is a drawn schematic partial cross-sectional view and is not necessarily realistically showing the shape and dimensions of the substance because it is schematically illustrated. This embodiment is an example in which the above-mentioned string type wiper device shown in FIG. 9 is used as a base body and is improved, and the same reference numerals as those in FIG. 9 are used in the embodiment of the invention of the prior application. The same or similar component. The difference between FIG. 1 and FIG. 9, that is, the matters improved by applying the present invention are as follows. That is, the heater 51 is arranged between the mirror body 4 and the mirror body 3 '. Specifically, an electric heater 51 is attached so as to be in close contact with the back surface of the mirror body 4. With this configuration, the mirror body 4 is directly heated to raise the temperature, so that the effect of melting the ice adhered to the reflecting surface of the mirror body 4 and preventing freezing and frost formation is remarkable. . In addition, the space surrounded by the mirror body 4 and the mirror body 3'is heated to raise the temperature. Then, for example, the tensioner in the invention of the earlier application is arranged between the mirror body 4 and the mirror body 3'as described with reference to FIG. 9 described above, so that the tensioner is arranged between the mirror body and the mirror body. The heater 51 extremely effectively generates heat to prevent the tensioner from freezing and to thaw the tensioner from freezing. Figure 2
FIG. 3 is an electric circuit diagram showing the electric power feeding means of the electric heater in the first invention shown in FIG. 1 above, and this electric circuit diagram is also applied to the electric power feeding means of the electric heater in the second invention. The electric heater 51 is disposed so as to face almost the entire surface of the mirror body 4, and is connected to a DC power source (in-vehicle battery in this embodiment) 52 via a switch 52.
When the above switch 53 is closed, the heater 51 is energized, and the frozen string type wiper device can be thawed and the freezing can be prevented. In this way, the trouble related to the freezing of the string-type wiper in the cold district is eliminated, and the reliability of the wiping operation and the durability are improved. FIG. 3 shows a state in which the second invention is applied to a string-type wiper device according to the prior art having a structure including a wiper arm. The wiper arm to which the string is attached, the mirror body, and a part of the mirror body are cut and drawn. It is a typical partial sectional view. This embodiment is an example improved by applying the present invention to the string-type wiper device according to the prior art shown in FIG. 15 described above, and the difference of FIG. 1 from FIG. 15 is that the mirror Body 4
That is, the electric heater 51 'was attached in close contact with the back surface of No. 2. The electric power feeding circuit of the electric heater 51 'is the same as that shown in FIG. 2 in the first invention.
The heater 51 is read as a heater 51 '. Figure 4
Shows a joint bracket for attaching the string to the orbiting belt in this embodiment, (A) is an exploded perspective view,
(B) is a perspective view of a state in the middle of assembling, and (C) is a perspective view of an assembling completed state. The joint bracket shown in FIG. 4 corresponds to the joint bracket 3 in the invention of the prior application shown in FIG.
It is a component corresponding to 2d. (See FIG. 4 (A)) In the orbiting belt 26 of this example, the through holes 26a orthogonal to the circumferential direction are provided.
On the other hand, a joint ring 43 formed by bending a wire-shaped material is configured. The leg portion of the above joint ring is indicated by the arrow h
As shown in FIG. 9B, the leg-shaped portion is protruded from the through hole and bent as shown by arrow i. In this state, the joint ring 43 can be swung in a swinging manner as indicated by the reciprocating arc arrow j-j ', which is suitable for attaching one end of the string thereto. 2c shown in FIG. 4 (C) is the ball of the ball joint described with reference to FIG. 9 (the invention of the prior application).

[0013]

When the present invention is applied, since a string is used as a member for wiping the mirror body surface,
(A) Since the contact area between the string, which is the wiping member, and the surface of the mirror main body is small, and the large and heavy member that reciprocates like the wiper arm in the conventional example is not provided, the driving force of the wiper device driving unit is It does not have to be small, and (b) there is no reciprocating weight member like the wiper arm, so there is no risk of noise even if the drive system has backlash or backlash, and (c) the string that is the wiping member Since it is pressed evenly against the surface of the mirror body, judder is unlikely to occur. (D) Even if the surface of the mirror body is a complicated convex curved surface, the string that is the wiping member adapts to the surface of the mirror body. (E) The string, which is the wiping member, is a thin member, and its color tone can be selected, so that the appearance can be made inconspicuous.
Further, in the device of the present invention, since the heater is installed between the mirror body and the mirror body, there is no fear that the heater will appear in the appearance and impair the design value, and Since it is housed between them, there is no risk of contact with external obstacles and damage, even if no additional protective means is provided. Further, in the string type wiper device, since the structural members that are easily affected by icing are arranged in the space surrounded by the mirror body and the mirror body and in a position near the surface of the mirror body, the heater is used as a mirror. By disposing it between the body and the mirror body, it is possible to effectively heat the above-mentioned "components that are easily damaged by ice formation", so that the thermal efficiency is good and the energy consumption is small. Further, for the same reason, there is an excellent practical effect that the thawing of the frozen and frozen component members can be rapidly advanced.

[Brief description of drawings]

FIG. 1 shows an example improved by applying the first invention to a string type wiper device according to the invention of the earlier application and the invention of the earlier application, in which a mirror body to which a mirror body is fixed and a part of a mirror housing are cut. It is a schematic partial cross-sectional view drawn by drawing, and does not necessarily represent the shape and size of the substance realistically because it is schematic.

FIG. 2 is an electric circuit diagram showing a power feeding means of the electric heater in the first invention shown in FIG. 1 above, and this electric circuit diagram is also applied to the power feeding means of the electric heater in the second invention. To be done.

FIG. 3 is a view showing a state in which the second invention is applied to a string type wiper device according to a prior art having a structure including a wiper arm, in which a wiper arm having a string attached, a mirror body, and a part of a mirror body are cut away and drawn. FIG. 3 is a schematic partial sectional view.

4A and 4B show joint brackets for attaching the strings to the orbiting belt in the present embodiment, where FIG. 4A is an exploded perspective view, FIG. 4B is a perspective view in the middle of assembly, and FIG. FIG.

FIG. 5 is a front external view of a vehicle outside mirror including a wiper device according to a conventional example.

FIG. 6 is a front view showing an embodiment of a wiper device for a mirror according to an unknown prior invention, with a part broken away.

FIG. 7 is a schematic cross-sectional view showing both ends of the string in the above embodiment, (A) shows a state in which one end of the string is attached to a revolving belt, (B).
Shows the other end of the string attached to a tensioner and under tension.

FIG. 8 is a partially cutaway front view showing an embodiment of the string wiper device of the invention of the prior application.

9 is a cross-sectional view taken along the line CC of the string tensioner provided in the embodiment shown in FIG. 8 above.

FIG. 10 Among the components shown in FIG. 9 above,
It is an exploded perspective view which extracted and drew the main member which takes in a string and is concerned in the action which gives tension.

FIG. 11 is shown to explain the operation and effect of the above embodiment, and (A) shows the string winding length and the string tension (that is, spring load) in the coil spring used in the string wiper according to the prior application. And (B) is a chart showing the relationship between the string winding length and the string tension (spring load) in the mainspring used in the present invention.

FIG. 12 is a cross-sectional view taken along a plane perpendicular to the mirror body, showing the wiper device drive system when a string type wiper device is attached to a remote control type outside mirror.

FIG. 13 is an enlarged view showing details of a portion A surrounded by a chain line circle in FIG. 12 and partially cut and drawn.

FIG. 14 is a front view for explaining the configuration and operation of a string type wiper device having a structure including a wiper arm.

15 is a cross-sectional view of the string wiper device including the wiper arm shown in FIG. 1 above.

[Explanation of symbols]

3 ... Mirror body, 4 ... Mirror body, 12 ... Mirror housing, 17 ... Transmission belt, 20 ... Eaves part, 22 ... Driving pulley, 23 ... Mirror base, 24 ... Wiper arm, 25 ... Idler pulley, 26 ... Orbit Belt, 27,
27 '... string, 27a, 27a' ... one end of string, 27b ... other end of string, 27c ... stroke end of string, 28 ... tensioner, 28a ... pipe, 28b ... tensioner coil spring, 28c ... tensioner inlet, 29 ... Wiper blade, 33a ... drive gear, 33b, 33c ... intermediate gear, 33d ... driven gear, 3
5 ... String tensioner, 35a ... String winding drum, 35b ... Drum shaft, 35c ... Drum cover,
35d ... spring spring, 35e ... cutting, 41 ...
Mirror body, 41a ... Opening part, 42 ... Mirror body, 4
3 ... Wiper shaft, 44 ... Wiper arm, 44a ... Cylinder, 44b ... Telescopic rod, 45 ... Tensioner inlet, 5
1, 51 '... Heater, 52 ... DC power supply, 53 ... Switch.

Claims (2)

[Claims] 1. A plurality of pulleys are arranged along the periphery of a mirror body fixed to a mirror body, and an endless annular belt is wound around the plurality of pulleys. A wiper device in which one end of a string movably arranged near the surface of the string is attached to the revolving belt and the other end of the string is attached to a tensioner, and tension is applied so that the string can be drawn out and drawn in freely. A heater is provided between the mirror body and the mirror body to heat the mirror body, the member provided between the mirror body and the mirror body, and the string. , Characterized in that it is possible to prevent freezing of water adhering to the mirror surface or water entering the mirror body,
A string-type wiper device that prevents icing. 2. A wiper shaft reciprocally mounted on a mirror body fixed to a mirror body, a drive means for rotating the wiper shaft reciprocally, and a reciprocating tilt fixed to the wiper shaft. A wiper arm that is attached to one end of the wiper arm and the other end of the string that is movably arranged near the surface of the mirror body. A wiper device which is freely tensioned, wherein a heater is provided between the mirror body and the mirror body, and the wiper device is provided between the mirror body and the mirror body and the mirror body. The members and strings that can be heated are prevented from freezing due to water adhering to the mirror surface or water that has penetrated into the mirror body. Characterized by the fact that
A string-type wiper device that prevents icing.