CN108934093B - Heating device - Google Patents
Heating device Download PDFInfo
- Publication number
- CN108934093B CN108934093B CN201810421280.1A CN201810421280A CN108934093B CN 108934093 B CN108934093 B CN 108934093B CN 201810421280 A CN201810421280 A CN 201810421280A CN 108934093 B CN108934093 B CN 108934093B
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- CN
- China
- Prior art keywords
- heat generating
- imaging
- heat
- bottom portion
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 18
- 238000003384 imaging method Methods 0.000 claims abstract description 45
- 239000011521 glass Substances 0.000 claims abstract description 11
- 238000009792 diffusion process Methods 0.000 description 19
- 239000011888 foil Substances 0.000 description 10
- 230000007423 decrease Effects 0.000 description 7
- 230000005855 radiation Effects 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
Abstract
The invention provides a heating device, which can realize a heating part with a simple structure and heat a front windshield in front of a shooting device in a uniform temperature mode. The heating device heats a glass surface of a vehicle included in an imaging range of an imaging device that images an outside of the vehicle, and includes: a main body having an opening that opens in a shooting direction of the imaging device; and a planar heat generating portion having a first region and a second region and generating heat uniformly in a plane, wherein the bottom of the opening is formed such that the first region of the heat generating portion is disposed at the bottom of the opening and the second region of the heat generating portion is disposed at a side surface of the opening as the distance from the imaging device in the imaging direction becomes shorter.
Description
Technical Field
The present invention relates to a heat generating device.
Background
At present, there are increasing cases where an image recording apparatus is equipped in a vehicle. Some of these image recording apparatuses for vehicles are mounted on a windshield from inside the vehicle.
In an image recording apparatus mounted on a windshield from inside a vehicle, if the windshield in front of a camera is blurred due to dew condensation or the like, an image of the camera becomes unclear.
Therefore, there is an image recording apparatus provided with a foil heater. The image recording device uses a foil heater to heat a front windshield in front of the image pickup device to prevent blurring, and performs image pickup and image recording in front of the vehicle.
In an image recording apparatus, it is important to uniformly remove the blur of a windshield in front of an imaging device in order to record an image without unevenness. In order to uniformly remove the blur of the windshield in front of the imaging device, it is important to uniformly heat the windshield in front of the imaging device.
In patent document 1, the foil heater is formed so that the heat radiation outputs per unit area of two different surface regions or length regions are different, and the heat radiation output of the foil heater farther from the front glass is increased and the heat radiation output of the foil heater closer to the front glass is decreased. In this way, in patent document 1, the temperature difference between the front windshield portion that is farther from the foil heater and the front windshield portion that is closer to the foil heater is reduced.
Documents of the prior art
Patent document
Patent document 1: international publication No. 2012/069115
Disclosure of Invention
Problems to be solved by the invention
However, if the thickness or thickness of the heater wire or the interval between heater wires is changed in order to make the amount of heat generation of the foil heater uneven, the structure of the foil heater becomes complicated, and the cost becomes high.
Accordingly, an object of the present invention is to provide a heat generating device that can realize a heat generating portion with a simple configuration and can heat a windshield in front of an imaging device so as to make the temperature of the windshield uniform.
Means for solving the problems
The heat generating device according to the present invention heats a glass surface of a vehicle included in an imaging range of an imaging device that images an outside of the vehicle, and includes: a main body having an opening that opens in an imaging direction of the imaging device; and a planar heat generating portion having a first region and a second region and generating heat uniformly in a plane, wherein a bottom portion of the opening is formed such that a distance from the glass surface decreases as the distance from the imaging device in the imaging direction decreases, the first region of the heat generating portion is disposed at the bottom portion of the opening, and the second region of the heat generating portion is disposed on a side surface of the opening.
Effects of the invention
According to the present invention, it is possible to realize a heat generating portion with a simple configuration and heat a windshield in front of an imaging device so that the temperature of the windshield is uniform.
Drawings
Fig. 1 is a view showing a case where an image recording apparatus having a heat generating device according to an embodiment is mounted on a vehicle.
Fig. 2 is a perspective view of a heat generating device included in the image recording apparatus.
Fig. 3 is a perspective view of the diffuser cover as viewed from the back side (the vehicle interior side of the vehicle).
Fig. 4 is a view showing a heat generating portion attached to the back surface side of the bottom of the diffusion mask.
Fig. 5 is a view showing a heat generating portion attached to the back surface side of the side portion of the diffusion mask.
Fig. 6 is an arrow sectional view a-a of fig. 2.
Description of the reference numerals
1 vehicle
1a front windshield
2 image recording device
10 heating device
11 body part
12 fixed part
13 bottom part
14. 15 side part
16 back
X1 and X2 openings
21 diffusing light cover
31 heat generating part
41 shooting camera
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Fig. 1 is a view showing a case where an image recording apparatus having a heat generating device according to an embodiment is mounted on a vehicle. Fig. 1 shows a vehicle 1 and an image recording apparatus 2. Fig. 1 shows a part of a vehicle 1 from the front in a perspective view.
The vehicle 1 has a front windshield 1 a. The image recording device 2 is attached to the front windshield 1a from the vehicle inside of the vehicle 1.
The image recording device 2 includes an imaging camera and images the front of the vehicle 1. The image recording apparatus 2 stores image data captured by the imaging camera in a storage device such as an HDD (Hard Disk Drive), for example.
Fig. 2 is a perspective view of the heat generating device 10 included in the image recording apparatus 2. As shown in fig. 2, the heat generating device 10 has a main body 11. The body portion 11 is formed of, for example, plastic. The heat generating device 10 has a heat generating portion that heats the windshield 1a included in an imaging range of an imaging camera (for example, see the imaging camera 41 of fig. 6) that images the outside of the vehicle 1, which will be described in detail later. Note that an arrow a3 in fig. 2 indicates an imaging direction of an imaging camera fixed to the back 16 described later.
The main body 11 includes: a fixed portion 12, a bottom portion 13, side portions 14, 15, and a back portion 16.
The fixing portion 12 has a planar shape. The fixed portion 12 is fixed to a windshield 1a from the vehicle interior side of the vehicle 1 (see fig. 6, for example). The fixing portion 12 is fixed to the windshield 1a by, for example, a double-sided tape.
The bottom 13 has a planar shape. The width of the bottom 13 shown by a double arrow a1 in fig. 2 is formed to gradually widen as it goes toward the pointing direction of the arrow A3. That is, the width of the bottom portion 13 is formed to gradually become wider toward the shooting direction of the shooting camera.
The side portions 14, 15 have a planar shape. The side portions 14, 15 extend from the bottom portion 13 toward the fixing portion 12. The heights of the side portions 14, 15 shown by the double arrow a2 in fig. 2 are formed to become gradually lower toward the pointing direction of the arrow A3. That is, the height of the side portions 14 and 15 is formed to gradually decrease toward the shooting direction of the shooting camera.
The back 16 has a planar shape. The back portion 16 extends from the bottom portion 13 toward the fixing portion 12. The back 16 has an opening X1, and a lens portion of a photographing camera (see fig. 6, for example) is inserted into the opening X1.
The main body 11 has a concave opening X2 surrounded by the bottom 13, the side portions 14 and 15, and the back portion 16. That is, the main body 11 has an opening X2 that opens in the shooting direction of the shooting camera.
The bottom portion 13, the side portions 14, 15, and the back portion 16 may be integrally formed and detachable from the main body portion 11. The bottom 13, sides 14, 15, and back 16 may also be referred to as a diffuser or shadow mask. Hereinafter, the bottom portion 13, the side portions 14, 15, and the back portion 16 are referred to as a diffusion mask. The diffusion light cover suppresses the incidence of the diffusion light from the vehicle interior to the photographing camera.
Fig. 3 is a perspective view of the diffuser cover 21 as viewed from the back side (the vehicle interior side of the vehicle 1). In fig. 3, the same portions as those in fig. 2 are denoted by the same reference numerals. As shown in fig. 3, the diffusion light cover 21 is formed of a bottom portion 13, side portions 14, 15, and a back portion 16.
A heat generating portion 31 is provided on the back surface side of the diffusion mask 21 as indicated by oblique lines. The heat generating portion 31 is, for example, a foil heater, and is adhered to the back surface side of the diffusion mask 21 by a double-sided tape.
More specifically, the heat generating portion 31 is attached to the back surface side of the bottom portion 13 of the diffusion cover 21 (the vehicle interior side of the vehicle 1). The heat generating portion 31 is bonded to the back surface side of the side portion 15 of the diffusion mask 21. Although not shown in fig. 3, the heat generating portion 31 is also bonded to the back surface side of the side portion 14 of the diffusion mask 21.
Fig. 4 is a diagram showing the heat generating portion 31 attached to the back surface side of the bottom portion 13 of the diffusion mask 21. In fig. 4, the same portions as those in fig. 3 are denoted by the same reference numerals. An arrow a11 shown in fig. 4 indicates the shooting direction of the shooting camera.
The heat generating portion 31 (a portion indicated by a broken line frame) is formed of, for example, a planar heating resistor. As shown in fig. 4, the heating wire of the heat generating portion 31 is formed in a meandering manner.
In addition, the heat generating portion 31 is formed so that the width is fixed in the shooting direction of the shooting camera. For example, as shown by a double arrow a12 in fig. 4, the heat generating portion 31 is formed so that the width is fixed.
The heating wire of the heating portion 31 is formed to have a uniform thickness and thickness. The heating wires of the heat generating unit 31 are formed at uniform intervals. This makes the amount of heat generated within the surface of the heat generating member 31 (within the frame of the broken line) uniform.
Fig. 5 is a view showing the heat generating portion 31 attached to the back surface side of the side portion 15 of the diffusion mask 21. In fig. 5, the same portions as those in fig. 3 are denoted by the same reference numerals. An arrow a21 shown in fig. 5 indicates the shooting direction of the shooting camera.
The heat generating portion 31 is formed of a planar heating resistor, as in the case of the heat generating portion 31 attached to the back surface side of the bottom portion 13 described with reference to fig. 4. As shown in fig. 5, the heat generating portion 31 is formed in a meandering manner. The width of the heat generating portion 31 gradually decreases in the imaging direction of the imaging camera shown by an arrow a21 in fig. 5. The heat generating portion 31 similar to that shown in fig. 5 is also formed on the rear surface side of the side portion 14 of the diffusion mask 21.
Here, the heating lines of the heat generating portions 31 formed on the bottom portion 13 and the side portions 14 and 15 of the diffusion mask 21 are formed continuously, and the thickness of the lines are formed uniformly. The heating wires of the heat generating unit 31 are formed at uniform intervals.
Therefore, the heat generation amount of the heat generation portion 31 formed on the bottom portion 13 and the side portions 14 and 15 of the diffusion mask 21 is uniform in the plane (inside the dotted line frame in fig. 4 and inside the dotted line frame in fig. 5).
In fig. 4 and 5, although the connection relationship of the heat generating portions 31 formed on the bottom portion 13 and the side portions 14 and 15 is not clearly shown (not shown by broken lines), they are formed continuously as described above.
Although not shown in fig. 4 and 5, the power supply unit supplies power to the heat generating unit 31. The heat generating unit 31 generates heat by the power supplied from the power supply unit.
Fig. 6 is an arrow sectional view a-a of fig. 2. In fig. 6, the same portions as those in fig. 2 are denoted by the same reference numerals. Fig. 6 shows an arrow a-a cross section of the heat generating device 10 of fig. 2 when it is attached to the windshield 1a of the vehicle 1, and also shows a part of the windshield 1a of the vehicle 1.
Fig. 6 shows the imaging camera 41 fixed to the opening X1 of the back 16. An arrow a31 shown in fig. 6 indicates the shooting direction of the shooting camera 41. Arrow A3 shown in fig. 2 corresponds to arrow a31 of fig. 6. Note that an arrow a32 shown in fig. 6 indicates the amount of heat generated by the heat radiated from the diffuser 21, and an arrow a32 indicates a longer length.
As shown by a double arrow a12 in fig. 4, the heat generating portion 31 of the bottom 13 is formed so that the width is fixed. Therefore, the amount of heat generated by the heat generating portion 31 of the bottom portion 13 is fixed in the imaging direction of the imaging camera 41 as indicated by an arrow a31 in fig. 6.
However, as shown in fig. 6, the bottom portion 13 of the opening X2 is formed so that the distance from the windshield glass 1a becomes shorter as the shooting direction (arrow a31) of the shooting camera 41 is directed. Therefore, the temperature of the portion of the front windshield 1a closer to the bottom portion 13 is higher than the temperature of the portion of the front windshield 1a farther from the bottom portion 13. For example, the portion of the front windshield 1a shown by the arrow a33b in fig. 6 has a higher temperature than the portion of the front windshield 1a shown by the arrow a33 a.
On the other hand, as described in fig. 5, the heat generating portions 31 of the side portions 14 and 15 are formed so as to gradually narrow in width as they go toward the imaging direction of the imaging camera 41 (the direction of arrow a21 in fig. 5). Therefore, the amount of heat radiated from the side portions 14 and 15 gradually decreases as it goes toward the shooting direction of the shooting camera 41.
Thereby, as shown by an arrow a32 in fig. 6, the amount of heat radiated from the bottom portion 13 and the side portions 14, 15 gradually decreases along the shooting direction (the direction of an arrow a31) of the shooting camera 41. That is, the heat generating device 10 can heat the windshield 1a of the vehicle 1 included in the imaging range of the imaging camera 41 so as to make the temperature uniform.
As described above, the heat generating device 10 that heats the windshield 1a included in the imaging range of the imaging camera 41 that images the outside of the vehicle 1 includes: a main body 11 having an opening X2 that opens in the shooting direction of the shooting camera 41; and a planar heat generating portion 31 having a first region and a second region and generating heat uniformly in a plane. The bottom 13 of the opening X2 is formed such that the distance from the front windshield 1a gradually decreases as the distance from the imaging camera 41 increases in the imaging direction, the first region of the heat generating portion 31 is disposed on the bottom 13 of the opening X2, and the second region of the heat generating portion 31 is disposed on the side portions 14 and 15 of the opening X2. Thus, the heat generating device 10 can realize the heat generating portion 31 with a simple configuration and heat the windshield 1a so as to be uniform in temperature.
In addition, the thickness of the heating wire, and the interval between the heating wires can be uniformly formed in the heating portion 31. Therefore, the heat generating device 10 can be easily manufactured as compared with a heat generating device in which the thickness of the heater line of the heat generating portion is formed unevenly, the thickness of the heater line, or the interval of the heater line is formed to uniformly heat the windshield 1 a. In addition, the heat generating member 31 is easy to design. Further, the cost of the heat generating device 10 can be reduced.
In the above description, the heat generating portion 31 is formed on the back surface side of the diffusion cover 21, but may be formed on the front surface side (the windshield 1a side) of the diffusion cover 21.
The shape of the heat generating member 31 shown in fig. 4 is not limited to the shape shown in fig. 4. The width of the heat generating portion 31 in fig. 4 may be formed so as to gradually narrow in the imaging direction indicated by the double arrow a 12.
Further, although the main body 11 is formed of a resin such as plastic, the diffusion cover 21 may be formed of a metal that contributes to heat radiation of the heat generating portion 31.
The heat generating portion 31 is formed continuously, but is not limited thereto. For example, the heat generating portions 31 may be formed individually in the bottom portion 13, the side portion 14, and the side portion 15.
Claims (1)
1. A heat generating device that heats a glass surface of a vehicle included in an imaging range of an imaging device that images an outside of the vehicle, the heat generating device comprising:
a main body portion having an opening that opens in an imaging direction of the imaging device, a bottom portion that is disposed so as to face the glass surface, and a side portion that extends from the bottom portion toward the glass surface;
a planar first heat-generating element portion having a surface located on a side opposite to the side where the glass surface is located with respect to the bottom portion, the surface being arranged in a planar manner along the bottom portion, and generating heat uniformly in the surface; and
a second heating element part adhered to the side part,
the bottom portion is formed so that a distance from the glass surface becomes shorter as the bottom portion is farther from the imaging device in the imaging direction,
the first heat generating element portion is adhered to the bottom portion and is formed so that a width in the photographing direction is fixed,
the width of the second heat generating element portion is formed to be narrower as being farther from the imaging device in the imaging direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-102158 | 2017-05-23 | ||
| JP2017102158A JP6953180B2 (en) | 2017-05-23 | 2017-05-23 | Heat generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108934093A CN108934093A (en) | 2018-12-04 |
| CN108934093B true CN108934093B (en) | 2022-08-16 |
Family
ID=64448360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810421280.1A Active CN108934093B (en) | 2017-05-23 | 2018-05-04 | Heating device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6953180B2 (en) |
| CN (1) | CN108934093B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378934A (en) * | 2006-03-08 | 2009-03-04 | 利奥波德·科世达责任有限股份公司 | Camera arrangement for a motor vehicle |
| CN102804912A (en) * | 2009-06-24 | 2012-11-28 | 法国圣戈班玻璃厂 | Disc with a heatable, optically transparent sensor array |
| CN103340010A (en) * | 2010-11-26 | 2013-10-02 | 大众汽车有限公司 | Arrangement for an image recording device in a vehicle |
| CN104160779A (en) * | 2012-03-05 | 2014-11-19 | 法国圣戈班玻璃厂 | Pane arrangement having an electrically heatable baffle plate |
| WO2016105674A1 (en) * | 2014-12-22 | 2016-06-30 | Illinois Tool Works Inc. | Dual plane heater for vehicle sensor system |
| CN106347219A (en) * | 2015-07-16 | 2017-01-25 | 三星电机株式会社 | Camera device used for vehicle and rearview mirror display system comprising camera device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59114364U (en) * | 1983-01-24 | 1984-08-02 | 古河電気工業株式会社 | Car rear window heater wire |
-
2017
- 2017-05-23 JP JP2017102158A patent/JP6953180B2/en active Active
-
2018
- 2018-05-04 CN CN201810421280.1A patent/CN108934093B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378934A (en) * | 2006-03-08 | 2009-03-04 | 利奥波德·科世达责任有限股份公司 | Camera arrangement for a motor vehicle |
| CN102804912A (en) * | 2009-06-24 | 2012-11-28 | 法国圣戈班玻璃厂 | Disc with a heatable, optically transparent sensor array |
| CN103340010A (en) * | 2010-11-26 | 2013-10-02 | 大众汽车有限公司 | Arrangement for an image recording device in a vehicle |
| CN104160779A (en) * | 2012-03-05 | 2014-11-19 | 法国圣戈班玻璃厂 | Pane arrangement having an electrically heatable baffle plate |
| WO2016105674A1 (en) * | 2014-12-22 | 2016-06-30 | Illinois Tool Works Inc. | Dual plane heater for vehicle sensor system |
| CN106347219A (en) * | 2015-07-16 | 2017-01-25 | 三星电机株式会社 | Camera device used for vehicle and rearview mirror display system comprising camera device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018198144A (en) | 2018-12-13 |
| JP6953180B2 (en) | 2021-10-27 |
| CN108934093A (en) | 2018-12-04 |
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