JP2938425B1 - Vehicle window heating system - Google Patents

Abstract

An object of the present invention is to heat a vehicle window glass quickly, to have a self-temperature controllability, and to heat a vehicle window glass to a desired temperature without requiring a separate power supply control device or the like, and to store the glass inexpensively and compactly. SOLUTION: At least a pair of predetermined patterns of electrodes 13, 14 and a positive temperature characteristic resistance heating element 15 having a self-temperature controllability formed so as to be overlapped between the opposing base films 11, 12 are sandwiched. A flexible film heater 1 that can be wound up and deployed as a whole, a storage section 2 that winds up and stores the heater 1, and a power supply section (lead wires 161 and 162, etc.) so as not to hinder the winding up and deployment of the heater 1. The storage unit 2 includes a charging member 24 that comes into contact with the base film 11 and / or 12 when the film heater 1 is pulled out and deployed, and the base film 1 and the charging member 24 A vehicle window glass heating device that is frictionally charged so as to be electrostatically attracted to the vehicle window glass G by contacting and moving with the member 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle window glass for melting snow on a window glass of automobiles such as passenger cars and other vehicles, frost, ice formed on the window glass, and fogging due to condensation. The present invention relates to a vehicle window glass heating device for heating.

[0002]

2. Description of the Related Art Various means have been proposed and put into practical use as means for melting snow accumulated on window glass of automobiles and other vehicles, frost formed on the window glass, fogging due to condensation, and the like. A typical example is a type in which warm air is blown from the defroster to the inner surface of a window glass such as a windshield of a vehicle, a heating wire is provided in the vehicle window glass, and electricity is supplied to this to generate heat and heat the window glass. Things.

[0003] However, the former requires too much time from starting the engine of the vehicle to obtaining hot air of a predetermined temperature,
It is difficult to quickly heat the window glass. The latter can heat the window glass more quickly than the heating by the defroster, but it is difficult to employ such a permanent type heating wire because it hinders the view of the vehicle windshield. In light of such circumstances, for example, Japanese Patent Laid-Open No. 60-25830 discloses
A vehicle glass surface heating apparatus in which a sheet heating element is stretched on a frame body that can be detachably mounted on a glass surface portion of a vehicle has been proposed.

Japanese Patent Application Laid-Open No. 7-315056 discloses a sunshade sheet which also serves as a heating sheet in which a heat-resistant sheet is superimposed on a sheet heating element from the front and back, and a storage section for winding and storing the sheet, which is provided on the upper surface of an automobile dashboard. Or a storage part formed in the front pillar of the vehicle, the sheet is pulled out from the storage part, a suction plate provided in advance at the drawer end of the sheet, a suitable part with a hook or other locking member, for example, the inner surface of the front glass of the vehicle, It teaches a device that arranges the seat on the inner surface side of a vehicle windshield by locking it to a sun visor, a rearview mirror, or the like.

Japanese Patent Application Laid-Open No. 8-53049 discloses a window covering sheet in which a heat-resistant sheet is superimposed from the front and back on a heating element that generates heat when energized, and the sheet is formed in a shape and size suitable for an automobile windshield or the like. A mounting device, such as a suction cup, provided at a required position on the periphery of the sheet, wherein the mounting device, such as the suction cup, attaches the sheet to an automobile window glass and melts snow, ice, and the like in the glass. I teach.

Japanese Patent Application Laid-Open No. 9-48327 discloses a flexible belt-shaped heating element having a fixed or variable overall length that generates heat when energized, and a pair of insertion members provided at both ends of the heating element or an appropriate position. A vehicle window glass deicing apparatus provided with a mounting portion such as a suction cup provided, wherein the pair of insertion members, which are mounting portions, are inserted between pillars provided at both ends of the vehicle window glass and the window glass. For this reason, a vehicle window glass deicing apparatus has been proposed which is attached to a vehicle window glass and used by attaching a suction cup to the window glass or the like. It also discloses that the heating element may be retractably wound and stored in a case. Furthermore, the convex surface side of the heating element is arranged on the window glass side by winding and utilizing the flexibility of the heating element, and the heating element is placed on the window glass using elastic restoring force. It can be arranged in contact with

Japanese Unexamined Patent Publication No. Sho 62-6851 and Japanese Unexamined Patent Publication No.
No. 7217 teaches an anti-fog anti-icing device in which a heating element made of a conductive transparent film is directly formed on a window glass for an automobile. Since the heating element is made of a conductive transparent film, it is applied to an automobile windshield. It is also applicable.

[0008]

However, the heating device taught by Japanese Patent Application Laid-Open No. S60-25830 is difficult to store because it is provided with a frame around the surface heating element. In addition, since the planar heating element is disposed slightly away from the vehicle glass surface due to the thickness of the frame, it is difficult to heat the glass surface efficiently and quickly.

Japanese Patent Application Laid-Open No. 7-315056 teaches a awning sheet which also serves as a heating sheet, and is provided with an appropriate portion such as an adsorber, a hook or the like provided at the drawing end of the sheet, such as an inner surface of an automobile windshield. The seat is arranged with a slight gap from the inner surface of the vehicle windshield because it is arranged on the inner side of the vehicle windshield by locking it to the sun visor, rearview mirror, etc. It is difficult to heat the glass surface efficiently and quickly.

[0010] The window covering sheet taught by Japanese Patent Application Laid-Open No. 8-53049 is also attached to the vehicle window glass by a fitting such as a suction cup provided at a required portion of the periphery of the sheet. In this case, the glass cannot be efficiently and quickly heated. The flexible belt-shaped heating element taught in Japanese Patent Application Laid-Open No. 9-48327 is a belt-shaped heating element, and can only partially heat a vehicle window glass. In addition, the convex surface side of the heating element is arranged on the window glass side by winding the heating element by using the flexibility thereof, and the heating element is elastically restored. Although it is said that it can be placed in contact with the window glass, if the area of the heating element is increased, it may seem simple at first glance, but in reality it may only partially contact the inside of the windshield of the vehicle, which is a complicated curved surface Come in a lot.

Japanese Unexamined Patent Publication No. Sho 62-6851 and Japanese Unexamined Patent Publication No.
No. 7217 teaches that a heating element made of a conductive transparent film that is permanently installed on an automobile window glass must be built into the window glass, so it is expensive, and the temperature of the heating element is maintained at an appropriate level to prevent fogging. On the other hand, a device or a temperature control means for controlling the power supply to the heating element is required separately in order to increase the ice effect and prevent damage to the window glass due to overheating, which complicates the structure and increases the cost.

Accordingly, an object of the present invention is to provide a vehicle window glass heating apparatus capable of efficiently and quickly heating a vehicle window glass. In addition, the present invention has a self-temperature controllability, so that a vehicle window glass can be heated to a desired temperature and maintained at that temperature safely without the necessity of a separate power supply control device or the like. Another object of the present invention is to provide an inexpensive vehicle window glass heating device.

Another object of the present invention is to provide a vehicle window glass heating device which can be stored compactly and can be easily and easily installed on the vehicle window glass from the stored state.

[0014]

To solve the above-mentioned problems, the present invention provides the following two types of vehicle window glass heating devices. (1) A first type vehicle window glass heating device. At least one pair of electrodes of a predetermined pattern and a positive temperature characteristic resistance heating element having a self-temperature controllability formed so as to be superposed on the electrodes between the opposing base films. A conductive film heater, a film heater storage portion capable of winding and storing the film heater, and capable of being pulled out and deployed from the retracted storage state, and electrically connected to the electrode so as not to hinder the winding and deployment of the film heater. A power supply unit, and the film heater storage unit includes a charging member that contacts at least one of the base films when the film heater is taken in and out, and the film heater includes the base film and the charging member. A vehicle window glass heating device characterized in that it is frictionally charged so as to be electrostatically attracted to a vehicle window glass by moving in contact with the vehicle window glass. (2) A second type of vehicle window glass heating device.

At least one pair of electrodes of a predetermined pattern and a positive temperature characteristic resistance heating element having a self-temperature controllability formed so as to be superposed on the electrodes are sandwiched between the opposing base films and have a self-winding and accommodating property. A film heater,
A power supply unit electrically connected to the electrodes so as not to hinder the self-winding and storing operation of the film heater; and the film heater frictionally charges at least one of the base films to thereby control vehicle window glass. A vehicle window glass heating device characterized in that it can be electrostatically attracted to a vehicle.

According to the first type of vehicle window glass heating device, when the film heater is not used, the film heater is wound up and stored in the storage portion, whereby the entire heating device is placed in a compact storage state. The storage section can be connected to an appropriate portion inside the vehicle using an adhesive, a connecting tool, or other connecting means. For example, when the vehicle windshield is heated by this heating device, the storage unit can be connected to one of the pillars located on both sides of the windshield or the dashboard.

When the vehicle window glass is heated, the film heater is pulled out of a storage portion installed in a portion inside the vehicle near the window glass. At this time, at least one of the base films constituting the film heater comes into contact with the charging member provided in the storage section, whereby the film heater is frictionally charged. If the amount of triboelectric charge is not sufficient due to a single drawing operation of the film heater, the predetermined amount of charge can be obtained by repeating the operation of rewinding the film heater into the accommodating portion and extracting the film heater an appropriate number of times.

The charged film heater can be held in contact with the inner surface of the window glass by the electrostatic attraction force to maintain the state. Here, when the resistance heating element is energized via the power supply unit and the electrode, the film heater generates heat, and the window glass can be efficiently and quickly heated. Thus, snow on the window glass, frost formed on the window glass, ice, fogging due to dew condensation, and the like can be quickly melted.

The film heater electrostatically attracted to the window glass can be easily peeled off from the window glass, and can be wound up and stored in the storage section. The storage unit includes a case having a film heater passage opening provided with the charging member, and a shaft that is rotatably supported by the case and that can be manually rotated to wind up the film heater. A case having a film heater passage opening provided with the charging member, and a shaft rotatably supported by the case and provided with a spring force in a direction in which the film heater is wound. The above-mentioned or the above-mentioned storage portion, which has a stopper of a clip system or the like capable of prohibiting winding and unwinding of the film heater in a state where the film heater is pulled out by a desired amount, and passing through the film heater provided with the charging member A case having an opening, and a film heater winding shaft mechanism provided in the case, wherein the film heater is pulled out by an arbitrary amount and stopped at that position. It can be exemplified those having entrainment is also possible mechanism of the heater. As such a winding shaft mechanism,
A take-up shaft mechanism having the same function as that used in a conventionally known roll curtain, a simple screen for image projection, or the like can be employed.

In any case, the charging member may be a fixed charging brush that contacts one surface of the film heater or a pair of fixed charging brushes that contact both surfaces, and the charging member of the film heater may be linked to the rotation of the winding shaft of the film heater. A rotating charging brush that rotates at a higher peripheral speed than the moving speed and contacts one surface of the film heater or a pair of rotating charging brushes that contact both surfaces, and a foamed resin that can be used in place of the fixed brush or the rotating brush. A flexible fixed charging member, a rotating charging member, or the like can be exemplified.

In any case, a stopper member may be provided at the free end of the film heater to prevent the film heater from being completely pulled into the storage portion. As such a stock member, a stopper bar, a suction cup that can be attracted to a window glass, or the like can be employed. When a member such as a stopper bar is employed, a suction cup or the like which can be locked to glass or the like may be provided on the member to support the weight.

The power supply unit may be provided with a plug for inserting an electric outlet, and the plug may be a plug connectable to a cigarette lighter outlet of an automobile. Examples of the power supply unit include a power supply unit including a first lead wire connected to an electrode of a film heater, a rotary power supply mechanism connected to the first lead wire, and a second lead wire connected to the power supply mechanism. . In this case, a plug connectable to the cigarette lighter outlet can be connected to the second lead wire. The rotary power feeding mechanism can be typically provided for the film heater winding shaft of the storage section.

According to the second type of vehicle window glass heating device, the film heater can be wound up by itself due to its self-winding storage property when not in use. Is compact and easy to store and store. The self-winding storage property is appropriately given according to the material of the component members of the film heater, such as the base film, by leaving the film heater in the wound state and leaving it as it is, or slightly heating the whole in the wound state. Can be kept.

To use this heating device, a triboelectric charging brush is used in which a film heater in a wound state is extended, and the surface of at least one of the base films constituting the heater is rubbed by hand. The toner is frictionally charged by rubbing with a suitable charging member such as afterwards,
The film heater can be held in contact with the inner surface of the vehicle window glass by the electrostatic attraction force to maintain the state.
Here, when the resistance heating element is energized via the power supply unit and the electrode, the film heater generates heat, and the window glass can be efficiently and quickly heated. Thus, snow on the window glass, frost formed on the window glass, ice, fogging due to dew condensation, and the like can be quickly melted.

The film heater electrostatically attracted to the window glass can be easily peeled off from the window glass, and can be brought into the winding state by itself due to the self-winding storage property. In the heating device of the second type as well, a plug for inserting an electric outlet can be provided in the power supply portion, and the plug can be a plug connectable to an outlet for a cigarette lighter of an automobile. The power supply unit may include, for example, a unit including a lead wire connected to an electrode of a film heater. In this case, a plug connectable to the cigarette lighter outlet can be connected to the lead wire.

In any of the above heating devices, the resistance heating element in the film heater is generally a PTC (Pos).
itive Temperature Coeffic
what is known as a resistance heating element,
For example, it can be formed into a film in a planar shape. Although the temperature of the resistance heating element rises due to energization, the electrical resistance gradually increases as the temperature rises, rises only to a certain temperature, and maintains that temperature, and has self-temperature controllability. Therefore, there is no need for a power supply control means or a temperature control means including a thermostat or the like for temperature control, and a simple temperature can be maintained without such a power supply control means or temperature control means. Therefore, the vehicle window glass heating device according to the present invention can inexpensively heat the vehicle window glass to a desired temperature and safely maintain the temperature. Further, the self-temperature controllability reduces the power consumption, the running cost is low, and the desired operation can be performed even with a normal automobile battery.

Further, since the resistance heating element can be formed in a film shape, the resistance heating element can be formed thin and flexible enough to electrostatically attract the film heater to the window glass by the electrostatic attraction force. Although the thickness of the film heater in the heating device of the present invention is not limited to this from the viewpoint of electrostatically adsorbing the film heater to the window glass, it may be approximately 200 μm to 220 μm. Further, the thickness of the resistance heating element is not limited thereto, but may be approximately 60 μm or less.

As the resistance heating element, a flexible one may be used, and the resistance heating element is not limited thereto.
Simple and inexpensive by applying a paste made of the TC resin composition on the base film surface in a planar manner by printing or the like, or laminating a film made of the PTC resin composition on the base film surface by adhesion or the like. Can be formed.

As the PTC resin composition, a metal powder (silver, copper, nickel or the like), a metal oxide powder (tin oxide or the like), a polyolefin resin such as polyethylene or polypropylene, or a thermosetting resin such as a silicone resin. Examples thereof include conductive particles such as carbon black (Ketjen black, acetylene black, thermal black, etc.), carbon fiber, graphite powder, and the like, or a mixture of these particles dispersed therein. In the present specification, “particles” is a concept including various types of particles such as spheres, scales, and fibers. As the conductive particles, among others, carbon black or graphite powder, or a mixture thereof, or those mainly composed of these are preferable.
Those having a range of μm to 50 μm are desirable.

The resistance heating element having the PTC characteristic in the film heater of the heating device of the present invention is not limited thereto, but one of the preferable ones is approximately 40 ° C. to 80 ° C., more preferably 50 ° C. Those whose temperature is stable in the range of about 60 ° C. can be mentioned. The electrode may have flexibility. Such an electrode is not limited thereto, for example, a conductive paste is applied on the base film surface by printing or the like, a conductive film of an electrode pattern is laminated by bonding or the like, or a metal is formed on the base film surface. It can be easily and inexpensively formed into a predetermined pattern by plating.

The conductive paste that can be used as an electrode includes metal powder (silver, copper, nickel, etc.), metal oxide powder (tin oxide, etc.), carbon black (Ketjen black, acetylene black, thermal black, etc.). Conductive particles such as carbon fiber, graphite powder, etc. (here, particles include spheres, scaly materials, fibrous materials, etc.) or a mixture thereof, with resin such as polyurethane, acrylic resin, silicone resin, polyethylene, etc. Can be exemplified. Examples of the conductive film include those obtained by forming the paste into a film, a metal foil, a conductive resin film, and an ITO film. The surface electrical resistivity of the electrode material is preferably less than 10 ² Ω.

Various electrode patterns can be employed. For example, a comb-shaped electrode can be used.
When electrodes having a comb-like pattern are employed in this manner, each pair of electrodes is typically arranged so that the comb teeth of one electrode are adjacent to and parallel to the comb teeth of the other electrode at intervals. Examples of the arrangement can be given. By energizing the resistance heating element with such a comb-shaped counter electrode, the energization to each part of the resistance heating element can be made uniform, and the temperature of each part of the resistance heating element can be easily increased uniformly. The resistance heating element may be divided into a plurality of pairs for each pair of electrodes in order to make the power supply to each section of the resistance heating element uniform and to easily increase the temperature of each section of the resistance heating element.

When the electrode is formed on the base film surface in advance, the resistance heating element is formed on the electrode by applying the PTC resin composition paste, laminating the film made of the PTC resin composition by bonding, or the like. From the base film. Further, another base film is stacked thereon, and the two base films are joined with an adhesive or the like, so that at least a pair of electrodes having a predetermined pattern between the opposed base films and a self-formed electrode formed on the electrodes. A film heater in which a positive temperature characteristic resistance heating element having temperature controllability is sandwiched can be obtained simply and inexpensively.

The base film sandwiching the resistance heating element or the like is a sheet made of a heat resistant material capable of withstanding the maximum temperature that the resistance heating element can reach (for example, a synthetic resin sheet having such heat resistance). Should be fine. In addition, a rollable flexible base film may be employed. Examples of such a base film include a polyethylene terephthalate (PET) film, a polyimide (PI) film, a polyamide (PA) film, a polyethylene (PE) film, and a polyurethane (PU) film.

[0035]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a vehicle window glass heating apparatus according to the present invention. FIG. 1 (A) is a front view showing a state where a film heater is partially drawn out, and FIG. FIG. 3C is a schematic sectional view taken along a direction perpendicular to the axis, and FIG. 3C is a schematic sectional view taken along a longitudinal axis of the film heater accommodating portion. In FIG. (C), the heater is indicated by a two-dot chain line.

2A and 2B show the structure of the film heater. FIG. 2A is a front view with a part omitted, FIG. 2B is a rear view with a part omitted, and FIG. 2C is a sectional structure. FIG. FIG. 3 is a diagram showing an example of a use state of the heating device shown in FIG. The vehicle window glass heating apparatus A shown in FIG. 1 includes a film heater 1 and a storage unit 2 for winding and storing the film heater.

The film heater 1 is, as shown in FIG.
A pair of comb-shaped pattern electrodes 13 and 14 and a positive temperature characteristic resistance heating element 15 having self-temperature controllability formed so as to be superposed on the pair of electrodes are sandwiched between opposed base films 11 and 12. is there. Each of the base films 11, 12 is not limited thereto, but is substantially transparent here, and is formed of polyethylene terephthalate.
The thickness t1 of one base film 11 is 125 μm and has flexibility, and the thickness t1 of the other base film 12 is
2 has a flexibility of 25 μm.

The electrodes 13 and 14 are formed on the inner surface of the base film 11 below the thickness of 125 μm. More specifically, the electrodes 13 and 14 are formed in a comb shape by printing on the inner surface of the base film 11 using a conductive paste composed of 75 parts by weight of silver flakes and 25 parts by weight of polyvinyl chloride (PVC). ing. The comb teeth of one electrode 13 are formed so as to be spaced from each other between the comb teeth of the other electrode 14. More specifically, the comb teeth of one electrode 13 are arranged so as to be adjacent to and parallel to the comb teeth of the other electrode 14 at intervals. Each electrode 1
The film thicknesses of 3 and 14 are about 10 μm.

The resistance heating element 15 is connected to the electrodes 13 and 14.
Is formed in a manner divided into two rows 151 and 152 on the top. Each of the resistance heating elements 151 and 152 is made of a paste of a positive temperature characteristic (PTC) resin composition composed of 50 parts by weight of a thermosetting silicone resin and 50 parts by weight of graphite particles,
By overlapping and printing on 14, they are formed in the same size, in the shape of a rectangle, and in the shape of a sheet and a film. The thickness t3 of each of the resistance heating elements 151 and 152 is about 30 to 40 μm.

The base film 12 is placed on the resistance heating element 15 (151, 152) from above.
And both base films 1 with adhesive 19
1 and 12 are joined. The thickness t4 of the adhesive is about 50
７０70 μm. Thus, the total thickness of the film heater is in the range of approximately 200 μm to 220 μm, has flexibility that can be rolled up as a whole, and has softness enough to be electrostatically attracted to a vehicle window glass as described later. doing.

The heater 1 having such a configuration has the electrodes 13 and 14
When 12 volts are applied to the resistance heating element 15 (151, 152) through the interface, the surface temperature rises to 55 ° C. after about 5 minutes.
A stable temperature can be maintained within the range. The storage unit 2
As shown in FIG. 1, a case 21 having a film heater passage opening 211, rotatably supported in the case 21,
An electrically insulating winding shaft 22 parallel to the opening 211, a winding spring 23 having one end connected to the case 21 and the other end connected to the shaft 22 so as to always apply a force in the winding direction to the shaft 22; A pair of fixed charging brushes 24 provided in the film heater passage opening 211 is provided. The storage section 2 further includes a rotary power supply mechanism 25. The case 21 is provided with a lower clip CL adjacent to the opening 211. The clip CL is an opening / closing clip which is always kept in a closed position by the bias of a spring.

The film heater 1 is passed through the opening 211 of the case 21 and between the pair of charging brushes 24, and one end is connected to the winding shaft 22. The pair of charging brushes 24 are in sufficient contact with the film heater 1 from both sides. Although not limited thereto, the brush bristles of the charging brush 24 are formed of polyamide. The rotary power supply mechanism 25 includes two conductive rings 251 a and 252 fitted at an end of the shaft rod 22 at intervals.
a and conductive leaf springs 251b and 252b that are cantilevered by the case 21 and resiliently contact the ring.

A pair of electrodes 13 and 14 of the film heater 1
Are connected to first lead wires 161 and 162, respectively, and one of them is connected to the conductive ring 2 through the shaft 22.
51a, the other also passes through the shaft 22 and the conductive ring 25
2a. Second lead wires 171 and 172 are connected to the conductive leaf springs 251b and 252b of the power supply mechanism 25, respectively, and plugs 18 are connected to tips of the lead wires. The plug 18 can be connected to an electric outlet for a cigarette lighter provided in the automobile here.

The housing 21 is provided with a suction cup 3 which can be sucked into a vehicle pillar or a window glass. A stopper rod 4 is provided at the other end (free end) of the film heater 1 to prevent the heater from being completely drawn into the storage portion, and a suction cup 3 is additionally provided on this rod. . According to the vehicle window glass heating device A described above, when the film heater 1 is not used, the film heater 1 is wound and stored on the winding shaft bar 22 of the storage unit 2, whereby the entire heating device is placed in a compact storage state. .

The storage section 2 is provided with a suction cup 3 at an appropriate position inside the vehicle.
Can be connected using For example, as shown in FIG. 3, when the vehicle windshield G is heated by the heating device A, the storage unit 2 is mounted on one of the pillars P located on both sides of the windshield G using the suction cup 3. Can be linked. When heating the windshield G, the film heater 1 is pulled out of the storage section 2 installed in the pillar P. This pull-out operation can be easily performed against the spring 23. At this time, the film heater 1 is pulled out while contacting both sides of the film heater 1 with a pair of charging brushes 24 provided in the storage section 2. As a result, the film heater 1 is frictionally charged. When the amount of triboelectric charge is not sufficient by one pull-out operation of the film heater 1, the predetermined amount of charge can be obtained by repeating the operation of winding the film heater 1 again into the storage section 2 and pulling out the film heater 1 an appropriate number of times. Can be The film heater 1 drawn out by a predetermined amount can be clamped by the openable / closable clip CL to prevent the film heater 1 from rewinding into the storage section 2.

Thus, the film heater 1 can be electrostatically attracted to the inner surface of the front glass G by electrostatic attraction, and the state can be maintained. In this case, in order to support the weight of the stopper rod 4 at the end of the film heater, the suction cup 3 provided on the rod is sucked to the windshield or the other pillar P in advance. In addition, the film heater 1 is pulled out to an extra eye, and the stopper rod 4 is fixed to the glass G or the other pillar P with the suction cup 3 in a slightly loosened state, and then the inner surface side of the film heater 1 is pressed to the glass G by hand. You may stroke it.

When the plug 18 at the end of the second lead wire extending from the storage section 2 is connected to the electric outlet for cigarette lighter, the leads 171 and 172, the rotary power supply mechanism 25, the first leads 161 and 162, and the electrode 13 , 14 to each of the resistance heating elements 151, 152.
Electricity is supplied by bolts, and the resistance heating element generates heat stably in a range of approximately 55 ° C. ± 5 ° C., whereby the entire film heater 1 is heated, and the windshield G can be efficiently and quickly heated. Thus, snow on the windshield G, frost formed on the window glass, ice, fogging due to dew condensation, and the like can be quickly melted.

Film heater 1 electrostatically attracted to window glass
Can be easily peeled off from the glass G,
Can be wound up and stored. Next, FIG. 4 shows another example of the vehicle window glass heating device according to the present invention, in which FIG. 4A is a perspective view in which the film heater is in a retracted and housed state, and FIG. It is a figure showing the state where it expanded.

The vehicle window glass heating apparatus B shown in FIG. 4 includes a film heater 10 and a power supply unit 5 connected thereto. The film heater 10 sandwiches a pair of comb-shaped pattern electrodes and a positive temperature characteristic resistance heating element having a self-temperature controllability formed so as to overlap the electrodes, between base films facing each other similarly to the film heater 1. The arrangement of the electrodes and the resistance heating element is slightly changed from that of the heater 1 in order to lead the lead wire from the lower end of the center of the heater, but the electrode structure, the structure of the resistance heating element, The material, function, and the like are substantially the same as those of the heater 1. However, the film heater 10 is given a self-winding storage property by being strongly wound in advance and left for a long time.

Lead wires 191 and 192 are connected to a pair of electrodes (not shown) of the film heater 10, respectively, and a plug 18 is connected to an end of the lead wire. When the vehicle window heating device B is not in use, the film heater 10 can be wound up by itself as illustrated in FIG. 4A due to its self-winding and storing property. The entire device B is compact, and storage and storage are easy.

In using the heating device B, the film heater 10 in the wound state is extended, and one or both sides of the heater are rubbed by hand, and a suitable charging member such as a friction charging brush or the like is used. It is triboelectrically charged by rubbing.
Thereafter, the film heater 10 is brought into contact with, for example, the inner surface of the windshield G of the automobile shown in FIG. 3 by electrostatic attraction, and the state can be maintained.

Thus, when the plug 18 at the end of the lead wire is connected to the electric outlet for cigarette lighter, the resistance heating element is energized at 12 volts through the lead wires 191 and 192 and electrodes not shown, and the resistance heating element is turned on. About 55
Heat is stably generated within the range of 5 ° C. ± 5 ° C., whereby the entire film heater 10 is heated, and the windshield G can be efficiently and quickly heated. This allows glass G
Frost formed on the glass, frost formed on the glass, clouding due to dew condensation, and the like can be quickly melted.

Film heater 1 electrostatically attracted to glass G
0 can be easily peeled off from the glass G and can be rolled up and stored by itself. In addition, at an appropriate portion such as one or both free ends of the film heater 10,
When the heater 10 is electrostatically attracted to the glass, a fixing tool such as a detachable suction cup 3 (see FIG. 4B) may be provided on the glass or the like to easily position the heater 10 on the glass.

In each of the heating sheets A and B, the heating means of the film heaters 1 and 10 employed is a positive temperature characteristic resistance heating element 15 having self-temperature controllability.
Since the temperature is (151, 152), the temperature rises due to energization. However, as the temperature rises, the electric resistance gradually increases, and only rises to a certain temperature (approximately 55 ° C. ± 5 ° C.), and the temperature can be maintained. . Therefore, there is no need for power supply control means or temperature control means including a thermostat or the like for temperature control, and the vehicle window glass can be heated to a desired temperature and maintained at that temperature safely. Further, the self-temperature controllability reduces the power consumption, the running cost is low, and the desired operation can be performed even with a normal automobile battery.

[0055]

As described above, according to the present invention, it is possible to provide a vehicle window glass heating device capable of efficiently and quickly heating a vehicle window glass. Further, according to the present invention, it has self-temperature controllability, so that it is possible to heat a vehicle window glass to a desired temperature and maintain the temperature safely without incurring a separate power supply control device or the like, and furthermore, running. It is possible to provide a vehicle window glass heating device that can be manufactured at low cost.

Further, according to the present invention, it is possible to provide a vehicle window glass heating device which can be stored compactly and can be easily installed on the vehicle window glass from the stored state.

[Brief description of the drawings]

1A and 1B show an example of a vehicle window glass heating apparatus according to the present invention. FIG. 1A is a front view of a state in which a film heater is partially drawn out, and FIG. FIG. 4C is a schematic sectional view taken along a direction perpendicular to the longitudinal axis, and FIG. 4C is a schematic sectional view taken along a direction parallel to the longitudinal axis of the film heater accommodating portion.

FIG. 2 shows the structure of a film heater.
Is a front view in which a part is omitted, FIG. (B) is a rear view in which a part is omitted, and FIG. (C) is a view showing a cross-sectional structure.

FIG. 3 is a view showing an example of a use state of the heating device shown in FIG. 1;

4A and 4B show another example of a vehicle window glass heating device according to the present invention. FIG. 4A is a perspective view showing a state in which a film heater is in a rolled-up and stored state, and FIG. FIG.

[Explanation of symbols]

 A Vehicle window glass heating device 1 Heater 11, 12 Base film 13, 14 Electrode 15 (151, 152) Resistance heating element 161, 162 First lead wire 171, 172 Second lead wire 18 Plug 2 Housing 21 Case 211 Case 21 opening 22 winding shaft rod 23 winding spring 24 charging brush (charging member) 25 rotary type power supply mechanism 251a, 252a conductive ring 251b, 252b conductive plate spring 3 sucker 4 stopper rod G automobile windshield P pillar 10 film Heater 191, 192 Lead wire

Claims (4)

(57) [Claims] An overall winding comprising sandwiching at least a pair of electrodes of a predetermined pattern and a positive temperature characteristic resistance heating element having a self-temperature controllability formed over the electrodes between opposed base films. A deployable flexible film heater, a film heater storage portion which can take up and store the film heater, and which can be pulled out and deployed from the wound storage state, and an electrode which is electrically connected to the electrode so as not to hinder the winding and deployment of the film heater. And a power supply unit connected to the
The film heater storage unit includes a charging member that comes into contact with at least one of the base films when the film heater is taken in and out, and the film heater is provided in the vehicle window when the base film comes into contact with the charging member. A heating device for a vehicle window glass, which is frictionally charged so that it can be electrostatically attracted to glass. 2. A self-winding and accommodating property in which at least a pair of electrodes of a predetermined pattern and a positive temperature characteristic resistance heating element having self-temperature controllability formed so as to be superposed on the electrodes are sandwiched between opposed base films. A film heater having
A power supply unit electrically connected to the electrodes so as not to hinder the self-winding and storing operation of the film heater; and the film heater frictionally charges at least one of the base films to thereby control vehicle window glass. A vehicle window glass heating device characterized in that it can be electrostatically attracted to a vehicle. 3. The vehicle window glass heating apparatus according to claim 1, wherein said resistance heating element is provided in a plurality of parts for each pair of electrodes. 4. The vehicle window heating system according to claim 1, wherein the power supply unit includes a plug for inserting an electric outlet, and the plug is a plug connectable to an outlet for a cigarette lighter of an automobile. apparatus.