JP2018198375A - Heating device - Google Patents

Abstract

To provide a heating device capable of warming such that the temperature of a windshield in front of an imaging apparatus becomes uniform while a heating portion has a simple structure.SOLUTION: A heating device for warming a glass surface of a vehicle included in a photographing range of an imaging apparatus that photographs the outside of the vehicle includes: a body portion including a fixed portion fixed to the glass surface and an opening that opens in a photographing direction of the imaging apparatus; and a planar heating portion having a first region and a second region and uniformly heating in a plane. The bottom of the opening is formed such that a distance between the glass surface and the bottom becomes shorter as the bottom separates farther from the imaging apparatus along the photographing direction. The first region of the heating portion is arranged to the bottom of the opening, and the second region of the heating portion is arranged to the fixed portion near an open end on an imaging apparatus side of the opening.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a heat generating device.

  Currently, the number of vehicles equipped with image recording devices is increasing. Some image recording apparatuses for vehicles are attached to the windshield from inside the vehicle.

  In the image recording apparatus attached to the windshield from inside the vehicle, if the windshield in front of the photographing camera becomes clouded due to condensation or the like, the image of the photographing camera becomes unclear.

  Therefore, there is an image recording apparatus provided with a foil heater. The image recording apparatus warms the windshield in front of the photographing apparatus with a foil heater to prevent fogging, and performs photographing and image recording in front of the vehicle.

  In order to record a uniform image in an image recording apparatus, it is important to uniformly remove the fog on the windshield in front of the photographing apparatus. In order to uniformly remove the fog on the windshield in front of the photographing apparatus, it is important to uniformly warm the windshield in front of the photographing apparatus.

  In Patent Document 1, a foil heater is formed so that the heat radiation output for each unit area of two different surface areas or length areas is different, the heat radiation output of the foil heater far from the windshield is increased, and from the windshield. The heat radiation output of the near foil heater is made small. In this way, Patent Literature 1 reduces the temperature difference between the windshield portion that is far from the foil heater and the windshield portion that is near from the foil heater.

International Publication No. 2012/069115

  However, if the thickness and thickness of the heater wires are changed or the interval between the heater wires is changed in order to make the heat generation amount of the foil heater non-uniform, the structure of the foil heater becomes complicated and the cost increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a heat generating device capable of warming the temperature of the windshield in front of the photographing device to be uniform while making the heat generating portion a simple structure.

  The heat generating device of the present invention is a heat generating device that warms the glass surface of the vehicle included in the image capturing range of the image capturing device that captures the outside of the vehicle, the fixing unit fixed to the glass surface, and the image capturing of the image capturing device A main body having an opening that opens in a direction, and a planar heat generating portion that has a first region and a second region and generates heat uniformly in the plane, and the bottom of the opening Is formed so that the distance from the glass surface becomes closer as it moves away from the imaging device along the imaging direction, and the first region of the heat generating portion is disposed at the bottom of the opening. The second region of the heat generating portion is disposed in the fixed portion in the vicinity of the opening end of the opening on the photographing apparatus side.

  According to the present invention, it is possible to warm the windshield in front of the photographing apparatus to be uniform while making the heat generating portion a simple structure.

It is a figure when the image recording apparatus carrying the heat generating apparatus which concerns on 1st Embodiment is attached to the vehicle. It is a perspective view of the heat generating device which an image recording device has. It is the perspective view which looked at the diffuser cover from the back side (vehicle inside of a vehicle). It is the figure which showed the heat generating part attached to the back side of the bottom part of a diffuser cover. It is AA arrow sectional drawing of FIG. It is the figure which showed the heat generating part attached to the back side of the bottom part of the diffuser cover which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a view when an image recording apparatus equipped with a heat generating apparatus according to the first embodiment is attached to a vehicle. FIG. 1 shows a vehicle 1 and an image recording device 2. FIG. 1 shows a part of the vehicle 1 in a perspective view from the front.

  The vehicle 1 has a windshield 1a. The image recording device 2 is attached to the windshield 1a from the inside of the vehicle 1.

  The image recording apparatus 2 includes a photographing camera and photographs the front of the vehicle 1. The image recording device 2 stores the image data taken by the photographing camera in a storage device such as an HDD (Hard Disk Drive).

  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 heating device 10 has a main body 11. The main body 11 is made of plastic, for example. As will be described later, the heat generating device 10 has a heat generating portion, and warms the windshield 1a included in the photographing range of a photographing camera that photographs the outside of the vehicle 1 (see, for example, the photographing camera 41 in FIG. 5). In addition, arrow A3 of FIG. 2 has shown the imaging | photography direction of the imaging camera fixed to the back part 16 mentioned later.

  The main body 11 has a fixed part 12, a bottom part 13, side parts 14 and 15, and a back part 16.

  The fixed part 12 has a planar shape. The fixing portion 12 is fixed to the windshield 1a from the inside of the vehicle 1 (see, for example, FIG. 5). The fixing part 12 is fixed to the windshield 1a with, for example, a double-sided tape.

  The bottom part 13 has a planar shape. The width of the bottom portion 13 indicated by the double-headed arrow A1 in FIG. 2 is formed so as to gradually increase as it goes in the direction of the arrowhead of the arrow A3. That is, the width of the bottom portion 13 is formed so as to gradually increase toward the shooting direction of the shooting camera.

  The side parts 14 and 15 have a planar shape. The side portions 14 and 15 extend from the bottom portion 13 toward the fixed portion 12. The heights of the side portions 14 and 15 indicated by the double-headed arrow A2 in FIG. 2 are formed so as to be gradually lowered in the direction of the arrow tip of the arrow A3. That is, the heights of the side portions 14 and 15 are formed so as to gradually decrease toward the shooting direction of the shooting camera.

  The back part 16 has a planar shape. The back portion 16 extends from the bottom portion 13 toward the fixed portion 12. The back portion 16 has an opening X1, and a lens portion of the photographing camera is inserted into the opening X1 (see, for example, FIG. 5).

  The main body 11 has a concave opening X <b> 2 surrounded by the bottom portion 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 and 15, and the back portion 16 may be integrally formed and can be detached from the main body portion 11. The bottom 13, sides 14, 15 and back 16 are also referred to as a diffuse cover or hood. Below, the bottom part 13, the side parts 14 and 15, and the back part 16 are called a diffused cover. The diffuser cover suppresses the diffused light from the vehicle from entering the photographing camera.

  FIG. 3 is a perspective view of the diffuser cover 21 as viewed from the back side (the inside of the vehicle 1). In FIG. 3, the same components as those in FIG. As shown in FIG. 3, the diffuser cover 21 is formed by a bottom portion 13, side portions 14 and 15, and a back portion 16.

  A heat generating portion 31 is provided on the back side of the bottom portion 13 of the diffuser cover 21 as indicated by hatching. The heat generating portion 31 is, for example, a foil heater, and is attached to the back side of the bottom portion 13 of the diffuser cover 21 with a double-sided tape.

  Further, as will be described next, a heat generating portion 31 is also provided on the back side of the fixed portion 12.

  FIG. 4 is a view showing the heat generating portion 31 attached to the back side of the main body portion 11. 4, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals. An arrow A11 illustrated in FIG. 4 indicates the shooting direction of the shooting camera.

  The heat generating portion 31 (portion indicated by a dotted frame) is formed by, for example, a planar heating resistor. As shown in FIG. 4, the heater wire of the heat generating portion 31 is formed to meander.

  The heat generating portion 31 has a first region formed on the back side of the bottom portion 13 and a second region formed on the back side of the fixing portion 12. A dotted line frame indicated by an arrow A12a in FIG. 4 indicates a first area of the heat generating portion 31, and an arrow A12b indicates a second area. The second region is formed on the back side of the fixed portion 12 and in the vicinity of the opening end of the opening X2 on the photographing camera side (see, for example, a dotted frame A34 in FIG. 5). More specifically, the second region is formed in the direction opposite to the shooting direction (the direction of the arrow A11) from the opening end of the opening X2 on the shooting camera side.

  The thickness, thickness, and interval of the heater wire of the heat generating part 31 are formed uniformly. For example, the thickness, thickness, and interval of the heater wire of the heat generating part 31 in the first region and the thickness, thickness, and space of the heater wire of the heat generating unit 31 in the second region are the same (hereinafter, , Including substantially the same). As a result, the heat generation portions 31 in the two regions have uniform heat generation in the plane (within the dotted frame).

  5 is a cross-sectional view taken along the line AA in FIG. In FIG. 5, the same components as those in FIG. 5 shows a cross section taken along the line AA when the heat generating device 10 of FIG. 2 is attached to the windshield 1a of the vehicle 1, and a part of the windshield 1a of the vehicle 1 is also shown. .

  FIG. 5 shows a photographing camera 41 fixed to the opening X1 of the back portion 16. An arrow A <b> 31 illustrated in FIG. 5 indicates the shooting direction of the shooting camera 41. The arrow A3 shown in FIG. 2 corresponds to the arrow A31 in FIG. Moreover, arrow A32 shown in FIG. 5 has shown the emitted-heat amount of the heat | fever radiated | emitted from the bottom part 13, and has shown that it is so large that the length of arrow A32 is long.

  As shown in FIG. 4, the heat generating portion 31 of the bottom portion 13 is formed so as to have a constant width in the shooting direction of the shooting camera 41 (the direction of the arrow A <b> 11). Therefore, the amount of heat generated from the bottom 13 is constant as shown by an arrow A32 in FIG.

  Here, as shown in FIG. 5, the bottom 13 of the opening X2 is formed so that the distance from the windshield 1a becomes closer as it goes in the shooting direction of the shooting camera 41 (arrow A31). For this reason, the temperature of the portion of the windshield 1a that is far from the bottom 13 is lower than the portion of the windshield 1a that is close to the bottom 13. For example, the temperature of the portion of the windshield 1a indicated by arrow A33a in FIG. 5 is lower than that of the portion of the windshield 1a indicated by arrow A33b.

  On the other hand, as described with reference to FIG. 4, the heat generating portion 31 is formed on the back side of the fixed portion 12 and in the vicinity of the opening end of the opening portion X2 on the photographing camera 41 side. For this reason, the heat generating apparatus 10 also radiates heat from the portion indicated by the dotted frame A34 in FIG. That is, the heat generating part 31 that is in contact with the windshield 1a via the fixing part 12 radiates heat in the vicinity of the part of the windshield 1a where the temperature is lowered (the part indicated by the arrow A33a). The radiated heat is transmitted to the portion of the windshield 1a where the temperature is lowered. Thereby, the heat generating apparatus 10 can warm the windshield 1a of the vehicle 1 included in the photographing range of the photographing camera 41 so that the temperature becomes uniform.

  As described above, the heating device 10 that warms the windshield 1a of the vehicle 1 included in the shooting range of the shooting camera that takes an image of the outside of the vehicle 1 includes the fixing unit 12 fixed to the windshield 1a and the shooting camera 41. It has a main body 11 having an opening X2 that opens in the photographing direction, and a planar heat generating portion 31 that has a first region and a second region and generates heat uniformly in the plane. The bottom portion 13 of the opening X2 is formed so that the distance from the windshield 1a becomes closer as the distance from the photographing camera 41 in the photographing direction becomes smaller. The first region of the heat generating portion 31 is the opening portion. The second region of the heat generating portion 31 is the fixed portion 12 and is disposed in the vicinity of the opening X2 on the photographing camera side of the opening X2. Thereby, the heat generating apparatus 10 can warm up the temperature of the windshield 1a, making the heat generating part 31 a simple structure.

  Further, the heat generating portion 31 can uniformly form the heater wire thickness, the heater wire thickness, and the heater wire interval. Therefore, the heat generating device 10 is easier than the heat generating device that uniformly heats the windshield 1a by forming the heater wire thickness, heater wire thickness, or heater wire interval in the heat generating portion non-uniformly. Can be manufactured. In addition, the design of the heat generating portion 31 is facilitated. Furthermore, the cost of the heat generating device 10 can be reduced.

  Although the heat generating portion 31 is formed on the back side of the bottom portion 13, it may be formed on the front side (front glass 1a side).

  Moreover, although the main-body part 11 was formed with resin, such as a plastics, for example, the diffuser cover 21 may be formed with a metal so that the thermal radiation of the heat-emitting part 31 may become good.

[Second Embodiment]
In the first embodiment, the heat generating part 31 formed on the back side of the fixed part 12 is formed in the direction opposite to the photographing direction from the opening end of the opening X2 on the photographing camera 41 side. In the second embodiment, the heat generating portion 31 is also formed from the opening end of the opening X2 on the photographing camera 41 side toward the photographing direction.

  FIG. 6 is a view showing a heat generating portion attached to the back side of the bottom portion of the diffuser cover according to the second embodiment. 6, the same components as those in FIG. 4 are denoted by the same reference numerals.

  The heat generating part 31 in FIG. 6 has a third region with respect to the heat generating part 31 shown in FIG. A dotted line frame indicated by arrows A41a and A41b in FIG. 6 indicates a third region of the heat generating portion 31. The third region is on the back side of the fixed portion 12 and is formed in the vicinity of the opening end of the opening X2 on the photographing camera 41 side, and faces the photographing direction of the photographing camera 41 (the direction of arrow A11 in FIG. 6). Formed. In other words, the third region is formed in the fixing portion 12 on both sides of the opening X2. Further, the third region is formed so that the width thereof becomes narrower as the distance from the photographing camera 41 in the photographing direction increases.

  The heater wires of the heat generating portion 31 in the third region are formed with the same thickness, width, and interval as the heater wires in other regions. Accordingly, the heat generation portions 31 in the three regions have uniform heat generation in the plane (within the dotted line frame).

  Here, as described in FIG. 5, the temperature of the windshield 1a heated by the bottom 13 is lower in the portion indicated by the arrow A33a than in the portion indicated by the arrow A33b.

  However, as described above, the third region of the heat generating portion 31 is formed so that the width becomes narrower as the distance from the photographing camera 41 in the photographing direction increases. Therefore, the temperature of the windshield 1a heated by the third region is higher at the portion indicated by the arrow A33a in FIG. 5 than at the portion indicated by the arrow A33b. Thereby, the heat generating apparatus 10 can warm the windshield 1a of the vehicle 1 included in the photographing range of the photographing camera 41 so that the temperature becomes uniform.

  As described above, the heat generating part 31 is formed from the opening end of the opening X2 on the photographing camera 41 side toward the photographing direction. Further, the heat generating portion 31 is formed so that the width thereof becomes narrower as it moves away from the photographing camera 41 in the photographing direction. Thereby, the heat generating apparatus 10 can warm up the temperature of the windshield 1a, making the heat generating part 31 a simple structure.

  In the above description, the heat generating portion 31 indicated by the arrow A12b and the heat generating portion 31 indicated by the arrows A41a and A41b are formed on the back side of the fixed portion 13, but the heat generating portion 31 indicated by the arrow A12b is formed. Instead, the heat generating portion 31 indicated by the arrows A41a and A41b may be formed. Also by this, the heat generating apparatus 10 can warm the windshield 1a of the vehicle 1 included in the photographing range of the photographing camera 41 so that the temperature becomes uniform.

DESCRIPTION OF SYMBOLS 1 Vehicle 1a Windshield 2 Image recording apparatus 10 Heat generating apparatus 11 Main body part 12 Fixed part 13 Bottom part 14, 15 Side part 16 Back part X1, X2 Opening part 21 Diffuse cover 31 Heat generating part 41 Shooting camera

Claims (4)

A heating device for heating the glass surface of the vehicle included in the imaging range of the imaging device for imaging the outside of the vehicle,
A main body having a fixed portion fixed to the glass surface, and an opening that opens in a photographing direction of the photographing device;
A sheet-like heat generating portion that has a first region and a second region and generates heat uniformly in the surface;
With
The bottom of the opening is formed so that the distance from the glass surface becomes closer as the distance from the imaging device increases along the imaging direction.
The first region of the heat generating portion is disposed at the bottom of the opening,
The second region of the heat generating portion is disposed in the fixing portion in the vicinity of the opening end of the opening on the imaging device side.
Heating device. The second region is formed from an opening end of the opening on the photographing device side in a direction opposite to the photographing direction.
The heat generating device according to claim 1. The second region is disposed in the fixed portion on both sides of the opening,
The heat generating device according to claim 1 or 2. The second region is formed so that the width thereof becomes narrower as the distance from the imaging device increases along the imaging direction.
The heat generating device according to claim 3.

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