JPS63198202A - Lamp apparatus for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The vehicle lamp of the present invention will be explained according to the following items.

A. Field of industrial application B. Outline of the invention C. Prior art 3. Problems to be solved by the invention E. 9 Means for solving the problems F. Embodiments [Figs. 1 to 6] a. Lamp body [Figures 1 to 4] b. Pipe [Figures 1 to 6] C. Lens [Figures 1 to 4] d. Light bulb [Figures 1 and 3] e. Action of the pipe f, Modifications of the lamp body [Figs. 7 to 9] f-1, First modification [Fig. 7] f-2, Second modifications [Figs. 8 and 9] g, Modifications of the pipe [Figs. 10 to 12] g-1 First modification [Fig. 10] g-2 Second modification [Figs. 11 and 12] G1 Effects of the invention (A , Industrial Application Field) The present invention relates to a novel vehicular lamp. Specifically, it is an object of the present invention to provide a novel vehicular lamp that is suitable as an automobile headlamp and is capable of quickly removing fogging when the lens or reflective surface becomes cloudy during the initial lighting stage. It is something to do.

(B. Summary of the Invention) The vehicle lamp of the present invention has two protruding pipes communicating with a lamp space defined by a lamp body and a lens,
The pipe is bent at least twice in the middle, and the tip of one pipe is positioned below the lower surface of the lamp body and is formed into a beveled shape, with the beveled surface facing approximately rearward. Therefore, when the vehicle starts running, negative pressure is generated at the tip of one pipe, and the air in the lamp space is forcibly discharged to the outside, and new air is forced into the lamp space through the other pipe. As the air enters the lamp, the air within the lamp space is forced to flow, and as a result, fogging that has formed on the inner surface of the lens, reflective surface, etc. due to the rapid temperature change in the initial stage of lighting is quickly removed.

(C Prior Art) In vehicle lamps, especially automobile headlamps, there is a large temperature difference between when they are not lit and when they are lit. Therefore, when the lamp is turned on, the lens and reflective surface become cloudy due to the small amount of moisture present in the lamp space.

When the lens or reflective surface becomes cloudy, the transmittance of the luminous flux decreases, resulting in the inconvenience that a predetermined light distribution cannot be obtained and a sufficient field of view cannot be obtained.

By the way, the above-mentioned fogging is caused by the presence of moisture in the lamp space, so the lamp is of a sealed type to prevent moisture from entering the lamp space, thereby preventing fogging on the lens and reflective surface. Automotive headlights have been proposed in the past.

(D. Problem that the invention seeks to solve) However,
No matter how high the degree of sealing is, it is extremely difficult to completely prevent moisture from entering the lamp space.

Therefore, instead of preventing moisture from entering the lamp space, the lamp space is communicated with the outside so that outside air can pass through the lamp space, and the convection of air inside the lamp space that occurs when the lamp is lit is used. A so-called vent type automobile headlamp has also been proposed in which an attempt has been made to remove fog by allowing outside air to pass through the lamp space.

However, conventional vent-type vehicle headlamps have a problem in that the air flow within the lamp space is not very active, and fogging cannot be removed quickly.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the vehicle lamp of the present invention has two pipes connected from the lamp body to the lamp space defined by the lamp body and the lens. The pipe is bent at least twice in the middle, and the tip of one pipe is positioned below the lower surface of the lamp body and formed into a beveled shape, and the beveled surface is directed approximately backward. It is aimed at

Therefore, when the vehicle starts running, negative pressure is generated at the tip of one pipe, and the air in the lamp space is forcibly discharged to the outside through that one pipe, and as a result, new air is forced into the other pipe. The air inside the lamp space is forced to flow into the lamp space through the lamp, and for this reason, even if the inner surface of the lens or reflective surface becomes cloudy due to a rapid temperature change in the initial stage of lighting, it will not fog up. Such haze will be removed immediately.

Furthermore, since the pipes are bent more than once in the middle, dust and dust will not enter the lamp space through these pipes and adhere to the lens or reflective surface, thereby reducing the light projection efficiency.

(F. Embodiment) [FIGS. 1 to 6] Details of the vehicle lamp of the present invention will be described below according to the illustrated embodiment. Embodiment 1 shown in the drawings is an example in which the present invention is applied to an automobile headlamp.

(a, Lamp Body) [Figures 1 to 4] Reference numeral 2 denotes a lamp body, which is made of synthetic resin, for example, reinforced plastic reinforced by mixing glass fiber or the like.

The lamp body has an open front surface, and a lamp chamber 4.4 having a paraboloid-shaped reflective surface 3.3 formed thereon is formed integrally with the lamp body in a row in the lateral direction.

A light bulb mounting hole 5. is provided approximately at the center of each light chamber 4.4.
5 is formed, and a circular surrounding wall 6.6 is integrally formed to surround the light bulb mounting hole 5.5 on the rear surface of the light chamber part 4.4 at a position slightly spaced apart from the edge of these openings. ing. A number of notches 7.7, . . . are formed in the rear end surfaces of these surrounding walls 6.6. In addition, the surrounding wall 6
．． Several bosses 8.8, .
are integrally formed, and these boss portions 8.8,...
are formed with screw holes 9.9, . Ribs 1o, 1o, . . . are formed between these boss portions 8.8, . . . and the surrounding wall 6.6.

11.11 is a light bulb mounting plate, and an insertion hole 12.12 is formed in the center thereof. A circular wall 13.13 is formed forward from the opening edge of the insertion hole 12.12 on the front surface of the light bulb mounting plate 11.11.
．． The inner diameter of 13 is sized to fit snugly into the surrounding wall 6.6. Also, this wall 13.13
Notches 14, 14, . . . are formed in the wall 1.
3.13 onto the surrounding wall 6.6.
6 and the boss portions 8.8, . . . ribs formed between the notches 14, 14, . The light bulb mounting plate 11.11 has a screw insertion hole 15.
15,... are formed, and when the wall body 13.13 is fitted onto the surrounding wall 6.6, screw insertion holes 15.15,...
... is a screw hole 9.9 formed in the boss portion 8.8, ...
It is now consistent with... Light bulb mounting plate 11.
Suppressing pieces 16.16 protrude toward the insertion hole 12.12 from the opening edge of the insertion hole 12.12 on the rear surface of 11.
· are integrally formed, and these pressing pieces 16.
One end in the circumferential direction of 16, .
7.17,...

The above-mentioned light bulb mounting plate 11 has its wall body 13.13 fitted onto the surrounding wall 6.6 of the lamp body 2, and the screws 18.13 are inserted through the screw insertion holes 15.15, . 18,
... are fixed to the lamp body by being screwed into screw holes 9.9, ... formed in the boss portions 8.8, ... of the lamp body 2. In this state, the pressing pieces 16.16, . . . of the light bulb mounting plate 11.11 are connected to the notches 7.7, .
from the rear, and the introduction part 17.17
,... are formed between the tips of the notches 7.7, . . . and the rear end surfaces 6a, 6a of the surrounding wall 6.6. Ru.

Reference numeral 20.21 denotes a connecting pipe that projects integrally from the rear surface of the upper part of the lamp chamber 4.4, and the inside and rear side of the lamp chamber 4.4 are communicated through the connecting pipes 2o and 21. .

(b, Pipe) [Figs. 1 to 6] Reference numerals 22 and 23 are pipes, one end of which is fixed to the connecting pipe 20 and 21 in an externally fitted manner.

The pipe 22 has an upper horizontal part 22a that extends straight rearward from a portion fitted onto the connecting pipe 20, an upper vertical part 22b that extends downward from the rear end of the upper horizontal part 22a, and an upper vertical part 22b. A lower horizontal part 22c extending laterally from the lower end and a lower vertical part 22d extending downward from the tip of the lower horizontal part 22c are integrally formed, and the lower end of the lower vertical part 22d is connected to the lamp body. It is located further below the lower end of 2. The lower end of the lower vertical portion 22d is obliquely cut at an angle of approximately 45°, and the beveled surface 24 faces toward the rear and lower part.

The other vibrator 23 also has an upper horizontal part 23a and an upper vertical part 23.
b, a lower horizontal portion 23c, and a lower vertical portion 23d are integrally formed, but the lower end of the lower vertical portion 23d is located above the lower end of the lamp body 2.

Thus, one of the pipes 22 and 23 serves as a discharge pipe, and the other serves as an inhalation vibrator.

(c, lens) [Figs. 1 to 4] Reference numeral 25 denotes a lens, and the lamp chamber 4 is attached to the front of the lamp body 2.
．． It is airtightly attached to cover the front surface of 4.

(d, light bulb) [Figure 1, Figure 3] 26.26 is a light bulb.

The light bulb 26 is a glass bulb 28 in which a filament 27 is enclosed.
and a base portion 29 on which the glass bulb 28 is supported.

30 is a metal holder wrapped around the rear end of the glass bulb 28, and the holder 30 is fixed to support pins 31, 31, . , the glass bulb 28 and the cap portion 29 are connected.

A connector portion 32 is integrally formed in the cap portion 29, one end of a contact piece (not shown) is positioned within the connector portion 32, and the other end of the contact piece protrudes from the front end of the cap portion 29 to connect the glass bulb 28h). It is connected to the external lead wire derived from the

A flange 33 is protruded from a position near the front end of the mouthpiece 29, and engagement pieces 34, 34, 34 are protruded from the outer peripheral edge of the flange 33 at intervals in the circumferential direction. Note that the width of this engaging piece 34.34.34 substantially matches the width of the notch 7.7.7 provided in the surrounding wall 6 formed in the lamp body 2, and the engaging piece 34.34. 34 is notch 7
．． 7.7 to fit snugly.

Reference numeral 35 denotes an O-ring made of an elastic material and attached to the outer peripheral surface of the front end of the mouthpiece 29.

Therefore, in the light bulb 26, the glass bulb 28 is connected to the light bulb mounting plate 11.
is inserted into the lamp chamber 4 through the insertion hole 12 and the surrounding wall 6. Then, the engaging pieces 34, 34, 34 of the light bulb 26 come into contact with the rear surface of the pressing piece 16 of the light bulb mounting plate 11. after that,
The entire bulb 26 is rotated in such a way that the engagement piece 34, 34, 34 moves towards the entrance of the introduction slit 19, 19, 19 of the bulb mounting plate 11. Then, the engaging pieces 34.34.
34 enters the introduction slit 19.19.19 while deflecting the introduction part 17.17.17 slightly backward, and eventually engages with the notch 7.7.7 provided in the surrounding wall 6, and this state The engaging pieces 34, 34, 34 are the suppressing pieces 1 of the light bulb mounting plate 11.
It is held by being pressed from behind by 6.16.16. The light bulb 26 is thus attached to the bulb body 2, and at this time, the O-ring 35 attached to the bulb 26 is compressed with the inner peripheral surface of the enclosure N6, and this light bulb attachment part is compressed. Make it airtight.

Therefore, the lamp space 36 defined by the lamp body 2 and the lens 25 is communicated with the outside only by the two vibrators 22 and 23. Note that the lamp space 36 is formed in a state where the two lamp chambers 4.4 are communicated with each other.

(e. Effect of pipe) In the above-mentioned automobile headlamp 1, when a car equipped with this headlamp runs, the lower end of one of the vibrators 22 is located below the lower end of the lamp body 2. The wind pressure associated with this is applied to the lower end of the vibrator 22. The lower end of this pipe 22 is obliquely cut, and the beveled surface 24 faces toward the lower rear, so that this pipe 22
Negative pressure is generated on the beveled surface 24 by the air flow passing around the lower end of the slanted surface 24 .

Therefore, the air in the lamp space 36 is forcibly discharged through the vibrator 22 due to the negative pressure, and the new air is replenished into the lamp space 36 through the other vibrator 23.

In this way, in the above automobile headlamp 1, air flow is generated in the lamp space 36 as the car in which it is installed runs, and this is done while always taking in outside air. Become.

Therefore, in the above automobile headlamp 1, even if fogging occurs on the inner surface of the lens 25 or the reflective surface 3 due to lighting, once the automobile starts running, the outside air generated in the lamp space 36 is taken in. The fogging will be rapidly removed by the air flow.

Incidentally, if the inside of the lamp space 36 is communicated with the outside, it is common for dust to enter the lamp space 36 and adhere to the reflective surface 3 and the inner surface of the lens 25. In this case, each of the vibrators 22 and 23 is formed with three bends, and the dust is slowed down by these bends and therefore does not reach the upper end of the vibrator 22 and 23. Also, each vibe 22.23 has 2
horizontal parts 22 a, 22 c, 23 a, 23
c is formed, so that even if dust enters into the vibrator 22.
c, 23a, and 23c, and hardly enters into the lamp space 36.

Furthermore, water intrusion is hardly a problem. Furthermore, vibe 2
Since the lower end of No. 2 is beveled, it is difficult for water droplets to adhere there.

Note that if the vibrators 22 and 23 are made removably attachable to the lamp body 2 and replaced periodically, the inside of the lamp space 36 will be further kept clean.

The inner diameter of the vibrator 22, 23 is most preferably within the range of 5 mm to 10 mm. The reason is that the inner diameter is 5mm.
If it is below, there is a risk of clogging due to the surface tension of water droplets attached to the lower end of the vibrator 22.
This is because if it is more than m, water and dust tend to enter easily.

Further, it is preferable that the vibrator 22, 23 is connected to the lamp body 2 at the upper end of the lamp body 2. By doing so, the length of the vibrator 22, 23 can be increased, and the effect of preventing the intrusion of dust and the like is enhanced. If the connection part of the vibrator 22.23 is located at the upper part of the lamp body 2, when viewed through the lens 25, the connection hole (opening part of the connection pipe 20.21 on the lamp space 36 side) is located at the bottom. It also has the advantage of being less noticeable than when it is on the side.

(f. Modified example of lamp body) [Figures 7 to 9] (f-1, first modification) [Figure 7] FIG. 7 shows a modification 2A of the lamp body.

In this lamp body 2A, the protrusion M3 is located close to the lower end of the shorter vibrator 23 and faces the lower end opening of the vibrator 23.
7 is formed.

Therefore, there is an effect that dust and water splashing up from below are obstructed by the projecting wall 37 and difficult to enter the vibrator 23.

(f-2, Second Modification) [FIGS. 8 and 9] FIGS. 8 and 9 show a second modification 2B of the lamp body.

A short duct 38 protruding from the lower end is formed in this lamp body 2B. The duct 38 has two side walls 3
9, 39 and a bottom wall 40 to surround the side and lower part of the lower end of the vibrator 22, and the front part of the duct 38 has an enlarged diameter part 41 whose diameter increases toward the front end. It is formed.

Therefore, the airflow accompanying the running of the car is taken in by the enlarged diameter portion 41 at the front end of the duct 38, and from there the flow path is narrowed to increase the flow velocity. A beveled surface 24 is located. Therefore, the negative pressure generated on the beveled surface 24 becomes higher, and as a result,
The efficiency of discharging the air within the lamp space 36 can be further increased.

The presence of this duct 38 also has the effect of preventing water and dust from entering the pipe 22.

Further, although it is better to have the bottom wall 40, a considerable effect can be achieved even without it.

(g, modified example of pipe) [Figures 10 to 12 (g-1, first modified example) [Figure 10] Figure 10 shows modified example 22A (23A) of the pipe. .

This pipe 22A (23A) is the pipe 22.23.
The portion 42 corresponding to the horizontal portions 22c and 23c of
2b, and the other parts are the same as the pipes 22 and 23.

By providing such a portion 42, dust can pass through this portion 42 and move up the vertical portion 22b (23b).
- It becomes more difficult to move the lamp, and it is possible to more effectively prevent dust and the like from entering the lamp space 36.

(g-2 second modification) [Figures 11 and 12] Figures 11 and 12 show another modification 22B (2nd modification) of the pipe.
3B).

This pipe 22B (23B) is the pipe 22.23.
The inner diameter of the portion 43 corresponding to the horizontal portions 22c and 23c is made larger than the inner diameter of the other portions.

As a result, the air flow suddenly slows down in this part 43, so that the dust carried by the air flow is left behind in this part 43, making it more difficult for dust to enter the lamp space 36. It can be effectively prevented.

(G. Effect of the invention) As is clear from the above description, in the wooden invention vehicle light, the front opening of the lamp body to which the light bulb is attached is covered with a lens, and the rear end of the lamp body is has two pipes protruding from the inside of the lamp body that communicate with each other, the pipes are bent at least twice in the middle, and the tip of one pipe is located below the bottom surface of the lamp body,
It is characterized in that it is formed into a diagonal cut shape, and the diagonal cut surface faces substantially rearward.

Therefore, when the vehicle starts running, negative pressure is generated at the tip of one pipe, and the air in the lamp space is forcibly discharged to the outside through that one pipe, and as a result, new air is forced into the other pipe. The air inside the lamp space is forced to flow into the lamp space through the lamp, and for this reason, even if the inner surface of the lens or reflective surface becomes cloudy due to a rapid temperature change in the initial stage of lighting, it will not fog up. Such haze will be removed immediately.

Furthermore, since the pipes are bent more than once in the middle, dust and dust will not enter the lamp space through these pipes and adhere to the lens or reflective surface, thereby reducing the light projection efficiency.

[Brief explanation of the drawing]

1 to 6 show an example of the implementation of the vehicle lamp of the present invention, in which FIG. 1 is a partially exploded perspective view, FIG. 2 is a horizontal sectional view, and FIG. 4 is an enlarged sectional view of the main parts, 5 is a side view of one pipe, 6 is a rear view of one pipe, and 7 is a lamp body. 8 and 9 show a second modification of the lamp body, FIG. 8 is a perspective view of the main part, and FIG. 9 is a perspective view of the main part. 10 is a horizontal sectional view, and FIG. 10 is a rear view showing the first modification of the pipe.
1 and 12 show a second modification of the pipe;
FIG. 1 is a rear view, and FIG. 12 is a sectional view taken along the line - 1 in FIG. 11. Explanation of symbols 1...Vehicle lamp, 2...Lamp body, 22.23...Pipe, 24...Beveled surface, 25...Lens, 26...
Light bulb, 2A...Lamp body, 2B...Lamp body, 22A (23A)...Pipe, 22B (23B
)... Pipe Applicant: Koito Seisakusho Co., Ltd. Representative Patent Attorney Yuji Komatsu Figure 5
Fig. 6 2B - Lumf angle, ゛° crush 22 -' Maia 24 - Semi-cut surface 22a B 6° 2c9 He-4 2d B41 Non-propagating Makiko 1 figure (modified example of 箪 2) 38 Fig. 10 23B -1-Bahia. 23B-11 Pier Figure 8 3゛9

Claims (1)

[Claims] The front opening of the lamp body to which the light bulb is attached is covered with a lens, and two pipes project from the rear end of the lamp body and communicate with the inside of the lamp body, and the pipes are connected to the lamp body. is bent at least twice in the middle, the tip of one pipe is located below the lower surface of the lamp body, and is formed in a beveled shape, and the beveled surface faces substantially rearward. Vehicle lights