JPH0664307U - Vehicle lighting - Google Patents

Abstract

(57) [Summary] [Purpose] To remove water in the lamp chamber and prevent fogging on the inner surface of the lens. [Composition] Communication holes 13, 14 and 16 communicating with the outside are provided in the upper and lower parts of the lamp body 2, and the communication holes and the cooler 17 are connected by connection pipes 32, 33 and 34, so that the lamp chamber can be An air passage returning to the lamp chamber through the cooler is formed, and the air in the lamp chamber heated by the light bulb 4 in the cooler is cooled to condense and remove moisture contained therein, and then dried. Return air to the lamp chamber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a new vehicular lamp. More specifically, the present invention relates to a vehicle lamp in which a communication hole that communicates with the outside is formed in the upper and lower parts of the wall of the lamp body that defines the lamp space, and these upper and lower communication holes are connected by a connecting pipe. By connecting them, a ventilation path is formed so that air can convection between the lighting space and the connection pipe by utilizing the heat generation effect of a light bulb arranged in the lighting space, and a cooling means is provided in the middle of the ventilation path. It is intended to provide a new vehicular lamp in which the air inside the air passage can be cooled by removing the moisture contained in the air passage by dew condensation.

[0002]

[Prior art]

 BACKGROUND ART A vehicle lamp, for example, an automobile lamp, generally includes a lamp body supported by a vehicle body or a support member fixed to the vehicle body, a lens attached to the lamp body so as to cover a front opening thereof, and the lamp body and the lamp body. It consists of a light bulb, etc. placed in the space of the lamp defined by the lens. Usually, a waterproof member is provided at the abutting part between the lamp body and the lens and the light bulb mounting hole of the lamp body.

However, since at least a part of an automobile lamp is used by being exposed to the outside, it is difficult to completely prevent moisture such as rainwater from entering the lamp space.

Therefore, in a vehicular lamp, in order to release the water that has entered the lamp space to the outside, or to evaporate the water by the heat generating action of the light bulb and discharge it to the outside of the lamp space, or the pressure in the lamp space. There is a case where a communication hole is provided in the wall portion of the lamp body for communicating with the outside, that is, a communication hole communicating with the lamp space and its outside so that the lamp does not rise.

[0005]

[Problems to be solved by the device]

 However, while such a communication hole can discharge and vent moisture in the lamp space, it is open to the outside air by the communication hole, so outside air containing a large amount of moisture also enters the lamp space. However, there is a problem that it also promotes the entry of moisture and dust into the lamp space.

That is, even if the moisture that has entered the lamp space is evaporated by the heat generating action of the light bulb and is discharged to the outside of the lamp space, for example, when the light bulb is turned off, it expands due to the heat generation of the light bulb. Since the air in the lamp space contracts, the outside air is sucked in, and if this air contains a lot of humidity or if it is raining, water will re-enter the lamp space.

In addition, two communication holes are provided in, for example, the upper and lower wall portions of the lamp, and the convection action due to the heat generation operation of the light bulb is positively used to empty the space containing the water vaporized from the upper communication hole. There is also one that allows the outside air to be sucked in from the lower communication hole at the same time as discharging the air.

However, even if the communication holes are provided in the upper portion and the lower portion as described above, the same amount of outside air as the air discharged from the upper communication hole is still sucked from the lower communication hole. Since it gets in, it is inevitable that moisture and dust enter the lamp space.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the vehicular lamp of the present invention comprises a lamp body, a lens covering a front opening of the lamp body, and a light source disposed in the lamp space defined by the lamp body and the lens. A communication hole communicating with the outside is formed in the upper part and the lower part of the wall of the, and a ventilation path is provided as a closed circuit by connecting the communication holes with a connecting pipe, and a cooling means is provided in the middle of the ventilation path. Is provided to allow the air in the lamp space to circulate in the air passage and to cool it at the same time.

[0010]

[Action]

 Therefore, in the vehicular lamp of the present invention, the air in the lamp space containing moisture, which is led out into the ventilation passage from the communication hole provided in the upper part of the lamp body due to the convection generated by the heat generation of the light bulb, is not vented The lamp is cooled by the cooling means provided in the middle part of the passage to remove moisture by dew condensation, and only the dry air returns to the lamp space from the communication hole provided at the lower part of the lamp body or at the side part. Effectively removes moisture and haze in the space.

[0011]

【Example】

 The details of the vehicle lighting device of the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

FIGS. 1 to 6 show a first embodiment in which the vehicular lamp of the present invention is applied to a rectangular automobile headlamp 1.

An automotive headlamp 1 is attached to the lamp body 2 and a container-shaped lamp body 2 having an irregular shape which is open to the front and is horizontally long when viewed from the front, and the left side deviates to the left as it goes downward. And a lens 3 that covers the front surface of the lamp body 2 and a light bulb 4 that is arranged at a predetermined position of the lamp body 2.

When the direction of the vehicle headlamp 1 is shown, the leftward direction in FIG. 2 is the left side, and the rightward direction is the right side.

The inner surface of the lamp body 2 except the upper surface and the lower surface thereof is a paraboloid of revolution, and is also a reflective surface made of aluminum vapor deposition or the like.

Reference numeral 5 denotes a light bulb attachment hole formed in a substantially central portion of the lamp body 2. The light bulb 4 attached to the light bulb attachment hole 5 has a filament 4a, which is substantially a paraboloid of revolution of the reflection surface. It is supposed to be in focus.

Reference numeral 6 denotes a lens installation groove formed on the opening edge of the lamp body 2 so as to open forward.

The lens 3 is integrally formed with a front surface portion 7 positioned so as to cover the front opening of the lamp body 2 and a peripheral wall portion 8 protruding substantially rearward from the peripheral edge of the front surface portion 7. A fitting piece 9 is integrally projectingly provided at the rear end of the lamp 8, and the fitting piece 9 is fitted in the lens mounting groove 6 of the lamp body 2 so as to cover the front surface of the lamp body 2. As a result, the lamp chamber 2 is defined by the lamp body 2 and the lens 3.

Reference numerals 11 and 12 denote connecting cylinders formed at the lower left and right corners of the rear surface of the lamp body 2, and the connecting cylinders 11 and 12 communicate with the inside and outside of the lamp body 2. Holes 13 and 14 are formed, respectively.

Reference numeral 15 denotes a connecting cylinder that protrudes upward from a position corresponding to directly above the bulb mounting hole 5 in a substantially central portion of the upper surface wall 2 a of the lamp body 2, and is larger than the connecting cylinders 11 and 12. The connecting cylinder 15 is also formed with a diameter, and a communication hole 16 for communicating the inside and outside of the lamp body 2 is also formed in the connecting cylinder 15.

Reference numeral 17 denotes a cooler made of metal, for example, aluminum, which is a substantially vertically long rectangular tube-shaped main body 18 and its lower portion is gradually displaced downward as it goes from the side toward the center when viewed from the rear. Through a rectangular funnel-shaped portion 19 having a slanting surface, and a rectangular-shaped tubular portion 20 below the funnel-shaped portion 19, and the funnel-shaped portion 19 is connected to an opening 21 having an inverted shape. The inside and outside are communicated by the communication hole 20a of the tubular portion 20.

Further, connecting cylinders 24 and 25 are provided at lower ends of the left and right side surfaces 22 and 23 of the main body 18, and a connecting cylinder 27 having a diameter larger than that of the previous connecting cylinders 24 and 25 is provided on the upper surface 26. The inside and outside of the main body 18 are communicated with each other by the communication holes 24a, 25a and 27a.

Reference numerals 30 and 31 denote cooling portions formed in the central portions of the front surface 28 and the back surface 29 of the main body 18 of the cooler 17, and are formed in a bellows shape in order to increase the surface area and increase the heat radiation effect.

Reference numerals 32, 33 and 34 denote flexible connecting pipes made of, for example, synthetic resin. The connecting pipes 32 connect the connecting pipe 11 of the lamp body 2 and the connecting pipe 24 of the cooler 17. Similarly, the connection pipe 33 connects the connection tube 12 and the connection tube 25, and the connection pipe 34 connects the connection tube 15 and the connection tube 27, respectively. The pipe 34 has a larger diameter than the connecting pipes 32 and 33.

Numerals 35 and 36 are mounting pieces projecting from the left and right side surfaces of the main body 18 of the cooler 17 and provided with a via hole in the center, and 37 and 38 are bulb mounting holes on the rear surface of the lamp body 2. 5 is a boss portion provided on the side of 5 corresponding to the mounting pieces 35 and 36.

Therefore, in the cooler 17, the mounting pieces 35 and 36 are screwed to the bosses 37 and 38 to be mounted on the lamp body 2, and the connecting pipe 32 connects the connecting tube 11 and the connecting tube 24 in the same manner. The pipe 33 connects the connecting tube 12 and the connecting tube 25, and the connecting pipe 34 connects the connecting tube 15 and the connecting tube 27, respectively, so that the lamp chamber 10-communication hole 16-connection pipe 34-communication A ventilation path is formed which includes the hole 27a, the cooler 17, the communication hole 24a, the communication hole 25a, the connection pipe 32, the connection pipe 33, the communication hole 13, and the communication hole 14-the lamp chamber 10.

When the light bulb 4 is turned on, the water in the light chamber 10 is heated by the heat generated by the light bulb 4 and part of the water vapor becomes water vapor, which is accompanied by the water vapor originally contained in the air in the light chamber 10. The inside of the cooler 17 is cooled to a low temperature by the heat radiating action of the cooling units 30 and 31 from the communication hole 16 of the connecting cylinder 15 immediately above the light bulb 4 through the connecting pipe 34 by the convection action of the heat generation of the light bulb 4. After entering, it is cooled, and dew is condensed to collect in the funnel-shaped portion 19 therebelow, and is discharged to the outside from the opening 21 through the communication hole 20a of the tubular portion 20.

Further, ascending airflow due to convection is generated in the lamp chamber 10 heated by the heat generation of the light bulb 4, but the connecting cylinder 15 is located above the light bulb mounting hole 5 of the lamp body 2, that is, the light bulb 4 immediately. Since it is formed right above, the ascending airflow due to the heat generation of the light bulb 4 can be positively used for ventilation between the lamp chamber 10 and the cooler 17, which is more effective.

Furthermore, since the connecting cylinders 11 and 12 are formed on the left and right lower portions of the rear surface of the lamp body 2 and at both ends thereof, the communication holes 13 and 12 are formed at the left and right corners of the inner surface of the lens 3 where it is most likely to be fogged. The air dried by the cooler 17 is blown from 14 so that the haze can be removed more effectively.

Furthermore, the communication hole 24a and the communication hole 25a of the main body 18 of the cooler 17 are provided slightly above the funnel-shaped portion 19, so that the inside of the main body 18 is opened from the opening 21 for some reason. Even if water enters, the water is collected in the funnel-shaped portion 19 and discharged to the outside. Therefore, the water surface does not rise above the funnel-shaped portion 19 and reach the communication holes 24a and 25a. It does not enter the chamber 10.

In this embodiment, the entire cooler 17 is made of metal such as aluminum having high cooling efficiency. However, only the cooling parts 30 and 31 may be made of metal and the other parts may be made of synthetic resin. Good.

FIG. 7 shows a modified example 17A of the cooler in the vehicular lamp of the present invention.

Therefore, in this modified example, since the shape and structure of the back surface 40 of the main body 39 of the cooler 17A is different from the cooler 17 of the above-described embodiment in this modified example, in the following description, Only different parts will be mainly described, and the same or similar parts as those in the above embodiment will be designated by the same reference numerals as those in the above embodiment, and the description thereof will be omitted.

Reference numeral 41 denotes a cooling unit attached to the back surface 40 of the main body 39 by an appropriate means such as screwing, and a large number of electronic cooling elements 43, 43, ... The one end faces 43a, 43a, ... Of the elements 43, 43, ... Are brought into close contact with the back face 40 of the main body 39, and the substrate 42 is connected to a power source by a cord not shown. ing.

The electronic cooling elements 43, 43, ... are made by joining a P-type semiconductor and an N-type semiconductor with metal, and are positive on the N-type semiconductor side and negative on the P-type semiconductor side. When a current is applied, the temperature of the metal joint surface becomes low, and the one end surfaces 43a, 43a, ... Are the metal joint surfaces.

As with the cooler 17 of the above-described embodiment, the cooler 17A is attached to the lamp body 2 by attaching the mounting pieces 35 and 36 to the bosses 37 and 38 with screws, and the connecting pipe 32 is connected. By connecting the pipe 11 and the connecting pipe 24, similarly, by connecting the connecting pipe 33 to the connecting pipe 12 and the connecting pipe 25, and connecting the connecting pipe 34 to the connecting pipe 15 and the connecting pipe 27, respectively, the lamp chamber 10-communication hole 16-connection pipe 34-communication hole 2 7a-cooler 17-communication hole 24a and communication hole 25a-connection pipe 32 and connection pipe 33-communication hole 13 and communication hole 14-vent room 10 Is formed.

When the light bulb 4 is turned on, the water in the light chamber 10 is heated by the heat generated by the light bulb 4 to become water vapor, which originally becomes the water vapor contained in the air in the light chamber 10 together with the light bulb 4. The inside of the cooler 17 whose temperature is lowered as a whole by the action of the cooling unit 30 and the cooling unit 41 from the communication hole 16 of the connecting cylinder 15 directly above the light bulb 4 through the connecting pipe 34 by the convection action due to the heat generation of After entering, it is cooled, and dew is condensed to collect in the funnel-shaped portion 19 at the lower portion thereof and passes through the communication hole 20a of the tubular portion 20 and is discharged from the opening portion 21 to the outside.

In the cooler 17A, the back surface 40 of the main body 39 is more positively cooled by the cooling unit 41, so that the inside of the cooler 17A becomes even colder, and the condensation of water is promoted. It works more effectively by removing the water in the lamp chamber 10.

Next, a second embodiment of the vehicular lamp of the present invention will be described with reference to FIGS. 8 and 9.

In the second embodiment, the vehicular lamp of the present invention is applied to a movable mirror reflector type automotive headlamp 1 A, and the opening direction of the connecting hole in the upper part of the wall portion of the lamp body is the above-mentioned. Unlike the first embodiment, the cooler and the method of connecting the cooler and the lamp body are basically the same as those shown in the first embodiment.

Therefore, in the following description, only the parts different from the first embodiment will be mainly described, and the same or similar parts as in the first embodiment will be described in the first embodiment. The same reference numerals are given to the same portions and the description thereof will be omitted.

The automobile headlamp 1A has a front and a rear surface that are open, and a lamp body 44 having a different shape that is laterally long when viewed from the front and is biased to the left as the left side goes downward as seen from the front. A lens 45 attached to the lamp body 44 and covering the front surface of the lamp body 44, and a lamp chamber 44 defined by the lamp body 44 and the lens 45 are rotated in the lamp body 44 by an unillustrated vertical and horizontal aiming adjustment mechanism. It consists of a reflection mirror 47 and the like which is supported as much as possible.

Reference numeral 48 denotes a light bulb mounting hole formed substantially in the center of the reflecting mirror 47, and an opening 49 is formed at a position corresponding to the light bulb mounting hole 48 of the lamp body 44.

Reference numeral 50 denotes a waterproof cover attached between the light bulb 4 and the lamp body 44.

Reference numerals 51 and 52 denote connecting cylinders formed at the lower left and right corners of the rear surface of the lamp body 44, respectively. The connecting cylinders 51 and 52 communicate with the inside and outside of the lamp body 44. Holes 53 and 54 are formed, respectively.

Reference numeral 55 denotes a connecting tube which projects rearward from a position above the opening 49 in a substantially central portion of the rear wall 44a of the lamp body 44, and which is the same as in the case of the first embodiment. The lamp body 44 is formed to have a larger diameter than the cylinders 51 and 52, and the inside and outside of the lamp body 44 communicate with each other through a communication hole 56.

Reference numerals 57, 58 and 59 are the same as the connecting pipes 32, 33 and 34 of the first embodiment, and the connecting pipes 51, 52 and 55 and the connecting pipes 24, 25 and 27 of the cooler 17, respectively. It is a connecting pipe for connecting.

Further, reference numerals 60 and 61 denote bosses for mounting the cooler 17, which are provided on the side of the opening 49 of the rear wall 44 a of the lamp body 44.

When the cooler 17 is attached to the lamp body 44 and the insides of the cooler 17 and the lamp chamber 46 are connected by the connecting pipes 57, 58 and 59, the lamp chamber 46-the communication hole 56- A ventilation path of the connection pipe 59-the communication hole 27a-the cooler 17-the communication hole 24a and the communication hole 25a-the connection pipe 57 and the connection pipe 58-the communication hole 53 and the communication hole 54-the lamp chamber 46 is formed, and the inside of the lamp chamber 46 is formed. The air is cooled in the cooler 17 to cause dew condensation to remove moisture, and only the dry air is returned to the lamp chamber 46.

In the second embodiment, the vehicular lamp according to the present invention is applied to the reflector-movable headlight for a vehicle. In this type, the lamp body and the reflector are used. Since the mirror is a separate body, the effective reflecting surface is not reduced by forming the communication hole in the reflecting surface.

[0051]

[Effect of device]

 As is clear from the above description, the vehicular lamp of the present invention comprises a lamp body, a lens covering the front opening of the lamp body, and a light source arranged in the lamp space defined by the lamp body and the lens. A lamp for a vehicle, wherein a communication hole communicating with the outside is formed in an upper portion and a lower portion of a wall portion of the lamp body, wherein the communication holes are connected by a connecting pipe to provide a closed circuit ventilation path, It is characterized in that a cooling means is provided at an intermediate portion of the ventilation passage to cool the air in the lamp space circulating inside the ventilation passage.

Therefore, in the vehicular lamp of the present invention, due to the convection generated by the heat generation effect of the light bulb, the humidity in the lamp space containing the moisture is led out into the ventilation passage from the communication hole provided in the upper part of the lamp body. The air is cooled by the cooling means provided in the middle part of the ventilation passage to remove moisture by dew condensation, and only the dry air returns to the lamp space from the communication hole provided at the lower part of the lamp body or at the side part. Therefore, moisture and cloudiness in the lamp space are effectively removed.

Further, since dry air enters the lamp space through the communication hole in the lower part of the lamp body and is blown to the inner surface of the lens, it is possible to more effectively remove the fogging on the inner surface of the lens.

It should be noted that the specific shapes and structures shown in the above-mentioned embodiments and modified examples are merely examples for embodying the present invention, and the technical scope of the present invention is limited by these. It is not intended to be interpreted.

[Brief description of drawings]

FIG. 1 is a rear view showing a first embodiment in which the vehicle lighting device of the present invention is applied to a vehicle headlight.

FIG. 2 is a front view showing a state in which a lens is removed.

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

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

FIG. 5 is an enlarged vertical sectional view of the cooler.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a vertical cross-sectional view of a cooling unit showing a modified example of the vehicular lamp of the present invention.

FIG. 8 is a rear view showing a second embodiment of the vehicular lamp of the present invention.

9 is a sectional view taken along line IX-IX in FIG.

[Explanation of Codes] 1 vehicle lamp 2 lamp body 3 lens 4 light source 10 lamp space 13 communication hole 14 communication hole 16 communication hole 17 cooling means 32 connection pipe 33 connection pipe 34 connection pipe 17A cooling means 1A vehicle lamp 44 lamp body 45 lens 46 lamp space 53 communication hole 54 communication hole 56 communication hole 57 connection pipe 58 connection pipe 59 connection pipe

Claims (1)

[Scope of utility model registration request] 1. A lamp body, a lens for covering a front opening of the lamp body, and a light source arranged in a lamp space defined by the lamp body and the lens, the lamp body being externally provided on an upper portion and a lower portion of a wall portion of the lamp body. A vehicular lamp having a communication hole formed therein, wherein the communication holes are connected to each other by a connecting pipe to provide a closed circuit, and a cooling means is provided at an intermediate portion of the ventilation path to provide the inside of the ventilation path. A vehicle lamp characterized in that the air in the lamp space that circulates through is cooled.