JPH0550604U - Vehicle parts - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a vehicle part having a simple structure, capable of preventing the surface of the lens 2 on the side of the room 20 from being fogged, and particularly preventing static electricity in the room 20. Especially. [Constitution] The antifogging paint 60 is applied to the surface of the lens 2 on the interior 20 side.
Apply. As a result, the anti-fogging paint 60 absorbs moisture in the room 20, so that the surface of the lens 2 on the room 20 side can be reliably prevented from being fogged. Moreover, since the antifogging effect of the lens 2 can be obtained only by applying the antifogging paint 60 to the surface of the lens 2 on the side of the room 20, the structure is simple. In particular, since the anti-fogging paint 60 having a semiconductor function is used, the anti-fogging paint 60 is electrically connected to the vehicle body 7 so that the portion to which the above-mentioned anti-fog coating 60 is applied is charged with static electricity. Does not get charged, and dust or dust does not adhere to that part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle part in which a room is defined by a lens and a housing, and in particular, the structure is simple, it is possible to prevent fog on the indoor side surface of the lens, and also to prevent electrostatic charge in the room. The present invention relates to a vehicle part that can be manufactured.

[0002]

[Prior Art]

 Vehicle parts that define a room by a lens and a housing include, for example, vehicle lamps for the purpose of lighting, signals, markings, etc. equipped with light source bulbs such as head lamps, side lamps, rear combination lamps, and turn signal lamps. There are also decorative parts for vehicles for the purpose of decoration without equipping a light source bulb such as a rear finisher. Further, the above-mentioned vehicle parts include a semi-sealed structure type in which the interior and exterior are communicated by a breathing structure, and a closed structure type in which the interior is completely sealed. Hereinafter, a conventional vehicle component will be described with reference to FIGS. 2 and 3. In this example, a headlamp of a vehicle lamp (vehicle headlamp), which is used as a semi-sealed headlamp, will be described. In the figure, 1 is a housing made of synthetic resin, for example. This housing 1 opens a front face 10 and a rear part 11. A breathing tube 12 is integrally projected rearward at a slightly upper portion of the rear part of the housing 1, and the breathing tube 12 is provided with a breathing hole 13 for communicating the inside of a lamp chamber 20 described later with the outside. A step portion 14 is provided on the outer peripheral surface of the middle portion of 12. A mounting boss 15 is integrally provided on the rear portion of the housing 1 so as to project rearward, and an insertion hole 16 is provided in the mounting boss 15. 2 is a lens. This lens 2 has a shape with an open rear portion. The rear opening of the lens 2 is attached to the front opening 10 of the housing 1 by airtightly adhesively sealing it with, for example, hot melt. As a result, the lamp chamber 20 defined by the housing 1 and the lens 2 is formed. Reference numeral 3 is a movable reflector. The movable reflector 3 has a front opening, and a reflective surface 30 such as a paraboloid of revolution is provided on the front side (inner side) of the movable reflector 3 by, for example, aluminum vapor deposition. Further, the movable reflector 3 is provided with a through hole 31 at a rear portion thereof, and a light source bulb attachment (not shown) is provided at a peripheral edge of the through hole 31. The movable reflector 3 is rotatably attached to the housing 1 by a pivot bearing mechanism (not shown). As a result, the movable reflector 3 is rotatably housed in the lamp chamber 20. A light source bulb 4 is, for example, an H4 type bulb. The light source bulb 4 includes a glass bulb 40, a main filament and a sub-filament (not shown) arranged in the glass bulb 40, and a light-shielding body (not shown) arranged below the sub-filament. ), A light-shielding film (not shown) provided on the front end of the glass tube 40, a base 41 integrally provided from the rear of the glass tube 40, and an intermediate part of the base 41. It comprises a collar portion 42 and a terminal 43 protruding from the rear portion of the base 41. The light source bulb 4 is inserted from the rear through hole 31 of the movable reflector 3 to the front reflecting surface 30 side of the movable reflector 3, and the collar portion 42 of the light source bulb 4 is brought into contact with the peripheral edge of the through hole 31 of the movable reflector 3. , The light source bulb 4 is detachably attached to the movable reflector 3 by the attachment of the movable reflector 3. As a result, the light source bulb 4 is arranged on the front side of the movable reflector 3, and the main filament and the sub-filament of the light source bulb 4 are positioned parallel to the central axis of rotation (optical axis) of the reflecting surface 30 of the movable reflector 3. In addition, the main filament is located near the focal point F of the reflecting surface 30 of the movable reflector 3. Reference numeral 44 is a rubber cap that is in close contact with the base 41 of the light source bulb 4, and 45 is a mounting cap that allows the peripheral edge of the rubber cap 44 to be in close contact with the rear opening 11 of the housing 1. Reference numeral 5 denotes a rubber grommet that has a function of breathing between the light chamber 20 and the outside air and a function of preventing water from entering, and has a tubular U-shape. One end (upper end) opening 51 of this grommet 5 is externally fitted to the tip end of the breathing cylinder 12, one end surface of the grommet 5 is brought into contact with the step portion 14 of the breathing cylinder 12, and the other end (lower end) opening of the grommet 5 is opened. (Not shown) is directed downward, and the other end opening of the grommet 5 is opposed to the rear wall of the housing 1. In the figure, 7 is a conductive vehicle body. This vehicle body 7 is provided with the above-described recess 70 for housing the headlamp, and the recess 70 is also provided with an insertion hole 71 at a position corresponding to the insertion hole 16 of the mounting boss portion 15 of the headlamp. The headlamp is housed in the recess 70 of the vehicle body 7, and the headlamp described above is attached to the vehicle body 7 with conductive bolts 72 and nuts 73.

Thus, when the light source bulb 4 is turned on, the light from the light source bulb 4 is reflected by the reflecting surface 30 of the reflector 3, the reflected light is transmitted through the lens 2, and is transmitted to the outside in a predetermined light distribution pattern. Is irradiated. Further, in such a headlamp, the interior of the lamp chamber 20 and the outside communicate with each other via the breathing hole 13 of the housing 1 and the grommet 5. As a result, a breathing action is performed between the inside of the lamp chamber 20 and the outside, and the pressure change in the lamp chamber 20 can be eliminated. Further, since the grommet 5 is bent in a U shape, and the one end opening 51 is externally fitted to the breathing tube 12 and the other end opening is attached downward, water enters the lower end opening of the grommet 5, and the water is grommet 5. Even if an attempt is made to enter the lamp chamber 20 through the inside, the water falls due to its own weight in the middle of the grommet 5 along the curved path and is discharged from the lower end opening of the grommet 5 to the outside to prevent reverse intrusion of water. You can

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional headlamp, since the inside of the lamp chamber 20 and the outside communicate with each other through the breathing hole 13 of the housing 1 and the grommet 5, the breathing action between the inside and the outside of the lamp chamber 20. Moisture penetrates into the lamp chamber 20 when the operation is performed. Therefore, due to the difference between the temperature inside the lamp chamber 20 and the outside air temperature, fog 6 (indicated by diagonal lines in FIG. 2 and dots in FIG. 3) 6 is generated on the inner surface of the lens 2. If the fog 6 is generated on the inner surface of the lens 2, for example, in the case of the above-described vehicle lamp, there are problems that a predetermined light distribution characteristic cannot be obtained, the light distribution is reduced, and the appearance is deteriorated. In the case of semi-hermetic vehicle parts other than the above-mentioned headlamps, the interior surface of the lens also becomes cloudy.

In the case of a vehicle part having a hermetically sealed structure, when the initial humidity is high, or when moisture flows in when the light source bulb is replaced, due to a difference between the room temperature and the outside temperature, the inner surface of the lens may be affected. Fogging occurs.

Therefore, a technique for preventing fogging on the inner surface of the lens of the vehicle parts such as the above-mentioned headlamp has been previously filed. For example, as such a technique, there is Japanese Utility Model Laid-Open No. 62-176901. However, the above-described technology and the like form an airflow passage between the lamp body and a reflecting mirror installed therein, and an antifogging member (for example, an antifogging member that increases the contact area with the circulating air in the airflow passage). The outer surface of the reflector or the inner surface of the lamp, or both surfaces made of rough surfaces with fine irregularities by honing etc., for example, aluminum parts of other parts made into a band with a honeycomb structure, etc. Is to be installed in the air flow passage.), There is a problem that the structure is complicated.

An object of the present invention is to provide a vehicle part that has a simple structure and can prevent fog on the indoor surface of the lens, and in particular, can prevent electrostatic charge in the room. is there.

[0008]

[Means for Solving the Problems]

 It is characterized in that an antifogging paint having a semiconductor function is applied to the interior surface of a vehicle part, and the antifogging paint is electrically connected to the vehicle body.

[0009]

[Action]

 In the present invention, the indoor anti-fogging paint applied to the interior surface of the vehicle component absorbs indoor moisture, so that the indoor surface of the lens can be reliably prevented from being fogged. However, since the anti-fog effect of the lens can be obtained simply by applying the anti-fog coating to the interior surface of the vehicle parts, it is necessary to process the parts themselves or to use other parts as before. The structure is simple because there is no need to use it. In particular, in the present invention, since the anti-fog coating material having a semi-conductive function is used, if the anti-fogging coating material is electrically connected to the vehicle body, the anti-fog coating material applied to the inner surface of the vehicle parts is protected. The cloudy paint will have the same potential as the vehicle body and will be grounded. As a result, static electricity is not charged on the interior surface of the vehicle component on which the anti-fog coating is applied, and dust or dust does not adhere to the area.

[0010]

【Example】

 An embodiment of the vehicle component of the present invention will be described below with reference to FIG. In this example, a headlamp for a vehicle lamp (vehicle headlight), which is used in a semi-hermetic headlamp, will be described. In the figure, the same reference numerals as those in FIGS. 2 and 3 indicate the same parts. In the figure, reference numeral 60 is an antifogging paint having a semiconductor function. The anti-fogging paint 60 is applied to the entire surface (inner surface) of the lens 2 on the lamp chamber 20 side. In the figure, 61 is an anti-fogging paint which also has a semiconductor function. The anti-fogging paint 61 is applied to the inner surface of the side wall of the lens 2 and the inner surface of the housing 1 between the anti-fogging paint 60 applied to the inner surface of the lens 2 and the mounting bolt 72 by extension coating. Then, the antifogging paint 60 applied to the inner surface of the lens 2 is electrically connected to the vehicle body 7 through the antifogging paint 61 extended, the mounting bolt 72 and the nut 73. Examples of the above-mentioned anti-fog coating material 60 include acrylic resin containing a large amount of −0H group in the resin molecule and imparting durability, anti-fog property, and semiconducting function to the resin itself as a water-soluble salt ( Applicant: Showa Shell Sekiyu Co., Ltd., agent: Eiji Tomomatsu, type: patent, reference number: HP000808-1, related to this FD application). Note that, in FIG. 1, hatching is omitted in manufacturing the drawing, and the antifogging paints 60 and 61 are hatched. Further, in the drawing preparation, the antifogging paints 60 and 61 are shown thicker than the actual thickness (5 to 20 μm).

Since the vehicle component of the present invention in this embodiment has the above-described structure, the breathing action between the inside of the lamp chamber 20 and the outside is achieved through the breathing hole 13 and the grommet 5 of the housing 1. Even if moisture enters the lamp chamber 20 during the operation, the moisture that has penetrated into the lamp chamber 20 is absorbed by the anti-fogging paints 60 and 61, so that the inside surface of the lens 2 is not fogged. It can be surely prevented. Moreover, since the antifogging effect of the lens 2 can be obtained by simply applying the antifogging paint 60 on the entire surface of the lens 2 on the indoor side, the parts themselves may be processed as in the conventional case. The structure is simple because there is no need to use separate parts. Particularly, in the present invention, since the antifogging paint 60 having a semiconductor function is used as the antifogging paint applied to the inner surface of the lens 2, the antifogging paint 60 has the same semiconductor function. When electrically connected to the vehicle body 7 through the anti-fog coating material 61 having the above and the bolt 72 and the nut 73, the anti-fog coating material 60 applied to the inner surface of the lens 2 has the same potential as the vehicle body 7 and is grounded. It will be. As a result, static electricity is not charged on the inner surface of the lens 2 to which the above-described anti-fog coating material 60 has been applied, and dust and dirt do not adhere. Further, since the antifogging paint 60 used in the above-mentioned embodiment has a larger water absorption amount as compared with the conventional antifogging paint, the effect of preventing the fog on the inner surface of the lens 2 is great. ..

Although the headlamp has been described in the above embodiment, it can be used for other vehicle parts such as vehicle lamps and vehicle decorative parts. Further, in the above-mentioned embodiment, the headlamp having the semi-enclosed structure has been described, but the present invention can also be used for a vehicle part having a closed structure. Further, in the above-described embodiment, the antifogging paint 60 is applied over the entire surface of the inner surface of the lens 2 (particularly, a portion in which a prism or the like is engraved and which is involved in illumination and light distribution). Of the inner surface of the lens 2, the anti-fog coating material 60 may be partially applied to a portion that tends to be fogged. Furthermore, the above-mentioned anti-fog coating material 60 generally absorbs water when it exhibits an anti-fog effect and releases water when the interior of the lamp chamber 20 is dry. Since the size of the particles is very small compared to the size of water particles at the time of absorption, moisture can be efficiently discharged to the outside. Furthermore, the above-mentioned anti-fog coating material 60 can protect the surface of the material to be coated and, at the same time, can provide the smoothness of the surface of the material to be coated, similarly to the top coat coating material. Therefore, when the above-mentioned lens 2 is a resin lens, by applying the antifogging paint 60, the smoothness of the inner surface of the lens 2 is improved and the light transmittance is improved, and the lens 2 becomes bright. On the other hand, when the above-mentioned lens 2 is glass, mirror finishing of the surface of the lens molding die is unnecessary, and even if the lens 2 is molded with the molding die with the rough surface, the inner surface of the lens 2 is By applying an antifogging paint, it is possible to obtain a predetermined light transmittance. Further, in the above-mentioned embodiment, the example in which the antifogging paint 60 having a semiconductor function is applied to the inner surface of the lens 2 is shown. However, the antifogging paint 60 having a semiconductor function is applied to the inner surface of the housing 1. Alternatively, it may be applied to the inner surfaces of the housing 1 and the lens 2.

[0013]

[Effect of the device]

 As is clear from the above, the vehicle parts of the present invention have the interior surface of the lens coated with the anti-fog paint, and the anti-fog paint absorbs moisture in the room. It is possible to reliably prevent fogging of the indoor surface of the lens. Moreover, since the anti-fog effect of the lens can be obtained simply by applying the anti-fog coating to the indoor surface of the lens, it is possible to process the parts themselves or use different parts as before. The structure is simple because there is no need to do it. In particular, in the present invention, since the antifogging paint having a semiconductor function is used, if the antifogging paint is electrically connected to the vehicle body, the antifogging paint applied to the interior surface of the vehicle parts The conductive paint has the same potential as the vehicle body and is grounded. As a result, static electricity is not charged on the part of the vehicle part on the indoor side where the antifogging paint is applied, and no dust or dirt adheres to that part.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an example of a vehicle part of the present invention, which is used for a headlamp having a semi-enclosed structure.

FIG. 2 is a front view showing an example of a conventional vehicle part, which is used in a headlamp having a semi-enclosed structure.

FIG. 3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 13 ... Breathing hole, 2 ... Lens, 20 ... Lamp room, 3 ... Reflector, 4 ... Light source bulb, 5 ... Grommet, 60 ... Anti-fog paint, 61 ... Anti-fog paint for extended application, 7 … Body, 72… Mounting bolts, 73… Nuts.

Claims (1)

[Scope of utility model registration request] 1. A vehicle part having a chamber defined by a lens and a housing, wherein an antifogging paint having a semiconductor function is applied to the inner surface of the vehicle, and the antifogging paint is electrically applied to a vehicle body. Vehicle parts characterized by being connected.