KR19980073296A - Windshield Defroster for Outdoor Camera Housing - Google Patents

Abstract

This invention discloses the glass defrosting apparatus of the front part of an outdoor camera or camcorder housing. Conventionally, outdoor cameras or camcorders have a temperature drop during winter or rainy weather, causing the glass on the front of the housing to be unable to accurately determine the shape of the subject. Therefore, outdoor cameras or camcorders installed on roads or highways, or obstacles installed behind vehicles The camera becomes useless. By attaching a circular or polygonal band-shaped heater to the edge of or near the glass of the front portion of the outdoor camera housing of the present invention, it is possible to obtain an accurate image of a subject when shooting an outdoor camera or a camcorder regardless of weather and temperature.

Description

Windshield Defroster for Outdoor Camera Housing

The present invention relates to a housing windshield of an outdoor camera with a strip-shaped heater for removing the frost generated on the housing windshield of the outdoor camera or camcorder or to prevent the frost is generated.

For example, the outdoor camera may be a camera or a camcorder (hereinafter, referred to as an outdoor camera) that is disposed on general city roads and highways to control traffic and violation vehicles or to be installed in a general home for crime prevention.

Since the installation place of the outdoor camera is outdoors, it causes rapid deterioration due to poor external conditions, so that it is usually installed in the form of a housing 2 as shown in FIG.

In addition, a front glass 4 is disposed on the front portion of the housing 2 so that the lens portion of the built-in camera 6 can illuminate the outside.

However, the windshield 4 of the housing 2 is always exposed to the outside of one side, it was only natural that the sex is generated during the winter and rain.

Accordingly, the camera violation monitoring camera installed on the road or highway could not accurately photograph the subject due to the generation of the windshield's sexuality, and the same problem occurred in the camera detecting the obstacle when the vehicle reversed, causing an accident or becoming useless. It was uncomfortable.

Therefore, a means of applying hot air to the windshield as a means to solve the above problems can be considered, but in this case, his technology is complicated, the device is huge, expensive, and also the outdoor camera itself has a problem There is a high likelihood.

Therefore, the present invention has been made to solve the above problems, the object of the present invention is to provide a front glass defrosting apparatus of the outdoor camera housing to be able to remove the life more simply and stably.

In order to realize this, the present invention is characterized by attaching a band-shaped heater of a circular or polygonal to the edge of the outer housing windshield of the outdoor camera.

Accordingly, by installing a sensor that detects a change in the temperature of the windshield of the outdoor camera housing, that is, when the ambient temperature is low, and enables the lens to warm as the sensor operates, or simply manually sets the front of the outdoor camera housing. By raising the temperature of the glass to the temperature of the edge of about 70 ~ 85 ℃, the temperature of the center of the glass to about 30 ~ 45 ℃ it is possible to remove the pre-formed frost or prevent the formation of frost.

1 is a perspective view of an outdoor camera for showing the application of the present invention.

Figure 2 is a perspective view of the windshield to which the present invention is applied.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B in FIG.

* Explanation of symbols for the main parts of the drawings

4: front glass, 10: heater, 12, 14: silver paste layer, 16: carbon paste layer, 18: coating paste layer, 20, 22: terminal part

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

1 to 4 show an example of a preferred embodiment of the present invention, the present invention is made by attaching a band heater 10 to the edge of the windshield 4 of the outdoor camera protection housing (2).

By connecting and applying an AC or DC power source to the terminal of the heater 10, the defrost is removed and the formation of the defrost is prevented.

More specifically, the heater 10 is composed of a pair of silver paste layers 12 and 14 and a carbon paste layer 16, and a protective means for protecting them outward is made of a coating paste layer 18. .

That is, band-shaped silver paste layers 12 and 14 are formed at both sides of the windshield 2, and a carbon paste layer 16 is formed at the edge of the windshield 2, but the silver paste layer 12 Part 14 was overlapped, and the coating paste layer 18 was formed on the outer surface of the carbon paste layer 16.

One end of each side of the silver paste layer 12 was extended to form terminal portions 20 and 22, and the terminal portions 20 and 22 thereof were connected to a power source.

In addition, when the windshield 2 is formed in a rectangular shape as shown in the drawing, the heater 10 formed as an edge thereof also takes a cutting shape, but in order to improve the function, it is preferable to form an inclined shape to chamfer the corner portion. .

The silver paste is mainly composed of silver powder, in which a small amount of lead oxide, cadmium oxide, bismuth oxide, and other metal oxides are mixed in order to improve the adhesion of the silver powder, and ethyl cellulose acrylic resin, butyl carbitol, di It is blended with a solvent such as butyl phthalate to make a paste and formed on a glass surface.

Although the amount of silver powder is not specifically limited here, 50-80 weight part is preferable, The compounding quantity of a metal oxide is 5-14 weight part, Resin 2-6 weight part is preferable, The quantity of a solvent varies with other components, ˜22 parts by weight is preferred.

In addition, the carbon paste may be prepared by blending carbon powder with at least one resin selected from the group consisting of modified phenolic resins, polyester resins, butylcarbitol or butyl cellulsolve acetate. It is preferable to make resin used at this time into 1 to 2 weight times with respect to the quantity of carbon powder.

In the above, the carbon paste protective coating paste preferably has good adhesion to glass. As such a coating paste, you may use polyester resin and butyl cellussolve acetate individually or in mixture of 2 types.

The strip-shaped heater may be either circular or polygonal in the front glass of the protective housing of the outdoor camera of the present invention. The applied power can control the temperature by adjusting the resistance of the carbon paste to use AC 110 volts or 220 volts, and the rear camera of the vehicle can adjust the resistance of the carbon paste so that the DC 12 volts or 24 volts can be used. To adjust the temperature.

The electrode of the terminal is formed in the silver paste layer so that current easily flows in the silver paste layer, and the carbon paste layer thereon generates heat by the current, thereby conducting heat to the glass plate to raise the temperature of the glass. At this time, when the temperature near the band-shaped heater is raised to about 70 to 85 ° C, the center of the glass rises to about 30 to 45 ° C.

Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited by these Examples.

Example 1

First, the composition of the silver paste for glass terminal attachment, the carbon paste for heat generation, and the coating paste for carbon paste protection is demonstrated.

1. Preparation of Silver Paste for Glass Terminal Attachment

15 parts by weight of butylcarbitol and 1.0 part by weight of dibutyl phthalate are mixed, 1.5 parts by weight of acrylic resin and 2 parts by weight of ethyl cellulose are added thereto, and mixed therein, 8.0 parts by weight of bismuth oxide, 0.5 parts by weight of cadmium oxide, and oxidation 0.5 parts by weight of lead is added and mixed to make it uniform, then 71.5 parts by weight of silver powder is added and mixed sufficiently to make a uniform paste.

2. Preparation of Carbon Paste

30 parts by weight of the polyester resin and 40 parts by weight of butylcarbitol were mixed, and 30 parts by weight of carbon (manufactured by Nippon Tokai Carbon Co., Ltd., trade name TOKABLACK) was mixed to make a carbon fest.

3. Preparation of Coating Paste for Carbon Paste Protection

55 parts by weight of the polyester resin and 45 parts by weight of butyl cellulose acetate were mixed and uniformed to prepare a coating paste. As needed, you may add a coloring agent to this coating paste.

The silver paste was printed on the edge of the glass plate used on the front surface of the housing for outdoor camera protection in a band shape having a width of 3 mm and a thickness of 10 μm, and baked at 600 ° C. for 10 minutes to form a silver paste layer. After firing, the mixture was cooled to room temperature, and the above exothermic carbon paste was printed with the same thickness and the same width on the silver paste layer and calcined at about 250 ° C. After the firing was cooled, the coating paste was coated on the carbon paste layer with the same thickness and width, and then fired at about 150 ° C. for about 30 minutes to complete the band heater. When the silver paste layer is formed in the above, a lead wire for terminal connection is formed.

Although only one example of the composition of the silver paste, the carbon paste, and the coating paste has been mentioned in the examples, the same or almost the same effect is obtained even if it is changed within the range described in the detailed description of the present invention.

Test Example

The heater obtained in the above example was attached to the front surface of the housing of the outdoor camera, and was tested by applying AC 220 volts. The rated voltage was 7W ± 10%, the rated current was 0.031AMP, and the glass surface temperature was 80 ° C. The temperature was 40 ° C.

As described above, when the glass with a heater is attached to the housing of the outdoor camera, the subject can be accurately photographed because the frost or steam does not frost on the front of the glass even in cold winter or rainy weather. It is a useful invention that can be applied to a reverse surveillance camera or a thermostat of a vehicle.

Claims (5)

A windshield of an outdoor camera protection housing; A windshield defrosting apparatus for an outdoor camera housing, characterized in that a strip-shaped heater (10) is attached to an edge of the windshield (2). The windshield according to claim 1, wherein the heater 10 includes a pair of silver paste layers 12 and 14 formed at both side edges of the windshield 2, and the silver paste layers 12 and 14. A windshield defrosting apparatus for an outdoor camera housing, comprising a carbon paste layer 16 formed entirely on the edge of (2). The outdoor paste of claim 1 or 2, wherein the silver paste layers 12 and 14 forming the heater 10 and the coating paste layer 18 are formed outside the carbon paste layer 16 as protective means. Windshield defroster in camera housing. The outdoor camera according to claim 1 or 2, wherein the one end of the silver paste layer 12 is extended so that this portion becomes the terminal portions 20 and 22 for applying power to the all heaters 10. Windshield defroster in housing. 3. The windshield defrosting apparatus of the outdoor camera housing according to claim 2, wherein the edge portion of the carbon paste layer 12 is formed to be inclined by chamfering the edge portion.