JPH0538482Y2 - - Google Patents

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. Overview of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems F. Examples [Figs. 1 to 8] a. Lamp body [Fig. 1] [Fig. 1 to Fig. 4] b Pipe [Fig. 1 to Fig. 8] c Lens [Fig. 1 to Fig. 4] d Light bulb [Fig. 1 to Fig. 4] Field of Application) The present invention relates to a novel vehicular lamp. Specifically, by ventilating the lamp space with the outside through a pipe, fogging that occurs on the lens and reflective surface due to temperature differences due to lighting is removed, and the lamp space and the outside are communicated. To provide a new vehicular lamp which prevents dust from entering the lamp space from the outside through a pipe connected to the lamp.

(B Overview of the invention) The vehicle lamp of the present invention bends a pipe communicating between the lamp space and the outside multiple times to form at least one horizontal portion that extends approximately horizontally, and The inner bottom surface near the bent part is made to protrude outward to form a large recess in a location away from the passage through which air flows.This allows dust to enter the lamp space even if it enters from the tip of the pipe. This is something I tried not to reach.

(C. Prior Art) Regarding vehicle lamps, especially automobile headlights,
There is a large temperature difference between when the lamp is not lit and when it is lit. Therefore, when the lamp is turned on, the lenses and reflective surfaces become cloudy due to a small amount of moisture 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 it is recommended to use a sealed type to prevent moisture from entering the lamp space, thereby preventing fogging on the lens and reflective surface. Automobile headlights have been proposed for some time.

(Problems to be solved by the invention D) 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 through a pipe so that outside air can pass through the lamp space.
A so-called vent-type automobile headlamp that attempts to eliminate fogging caused by passing outside air into the lamp space by utilizing the air convection within the lamp space that occurs when the lamp is lit. Lights are also suggested.

However, when the lamp space is communicated with the outside through a pipe, there is a problem in that dust enters the lamp space through the pipe.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the vehicle lamp of the present invention bends the pipe connecting the lamp space and the outside multiple times to form at least one substantially horizontal pipe. In addition to forming a horizontal portion extending in the horizontal direction, the inner bottom surface near the bent portion of the horizontal portion is made to protrude outward to form a larger recess at a location away from the passage through which air flows.

Therefore, in the vehicular lamp of the present invention, even if dust enters from the tip of the pipe, the dust slows down at the plurality of bends and is likely to be left on the horizontal portion. In addition, since a recess is formed near the bend of the horizontal part, the dust that has slowed down tends to accumulate in this recess, and furthermore, since the recess is located away from the passage through which air flows, Dust that has once entered the recess will not come out of the recess due to air flow, which prevents dust from entering the lamp space and staining the inner surface of the lens, reflective surface, etc. .

(Embodiment F) [Figs. 1 to 8] Details of the vehicle lamp of the present invention will be described below with reference to illustrated embodiments. 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] 2 is a lamp body made of synthetic resin, for example,
It is made of reinforced plastic reinforced with glass fiber.

The lamp body has an open front surface, and lamp chambers 4, 4 having reflective surfaces 3, 3 shaped like paraboloids of revolution are integrally formed on the inner surface of the lamp body, side by side in the lateral direction.

Light bulb mounting holes 5, 5 are formed approximately in the center of each lamp chamber 4, 4. Circular surrounding walls 6, 6 are integrally formed on the rear surfaces of the lamp chambers 4, 4 so as to surround the light bulb mounting holes 5, 5 at positions slightly spaced apart from the edges of these openings. The rear end surfaces of these surrounding walls 6, 6 have several notches 7,
7,... is formed. Further, several boss portions 8, 8, ... are integrally formed adjacent to the outside of the surrounding walls 6, 6, and screw holes 9, 9, ... are formed in these boss portions 8, 8, .... has been done. Ribs 10, 10, . . . are formed between the boss portions 8, 8, . . . and the surrounding walls 6, 6.

Reference numerals 11 and 11 denote light bulb mounting plates, and insertion holes 12 and 12 are formed in the center thereof. On the front surfaces of the light bulb mounting plates 11, 11, circular walls 13, 13 are formed forward from the opening edges of the insertion holes 12, 12, and the inner diameters of the walls 13, 13 are equal to the surrounding wall 6. , 6 is formed to a size that allows it to fit snugly onto the outside. Moreover, notches 14, 14, ... are formed in the walls 13, 13, and the walls 13,
13 onto the surrounding walls 6, 6, the ribs formed between the surrounding walls 6, 6 and the boss portions 8, 8, . . . come to engage with the notches 14, 14, . ing. The light bulb mounting plates 11, 11 are formed with screw insertion holes 15, 15, . are arranged to coincide with the screw holes 9, 9, . . . formed in the boss portions 8, 8, . Pressing pieces 16, 16, . 16, 16,...
One end in the circumferential direction of the introduction part 1 is inclined so as to be gradually displaced backward as it approaches the tip.
7, 17,...

The light bulb mounting plate 11 as described above has its walls 13,1
3 is fitted onto the surrounding walls 6, 6 of the lamp body 2, the screws 18, 18, ... inserted through the screw insertion holes 15, 15, ... are inserted into the boss parts 8, 8, ... of the lamp body 2. It is fixed to the lamp body by being screwed into the formed screw holes 9, 9, . In this state, the pressing pieces 16, 16, . . . of the light bulb mounting plates 11, 11 are pressed against the surrounding wall 6,
The notches 7, 7, . . . are located so as to cover the notches 7, 7, . Introductory slits 19, 19, . . . whose spacing becomes narrower toward the 7, . . . side are formed.

Reference numerals 20 and 21 denote connection pipes that are integrally provided on the rear surfaces of the upper parts of the light chambers 4 and 4, and the inner and rear sides of the light chambers 4 and 4 are communicated through the connection pipes 20 and 21. There is.

(b Pipes) [Figs. 1 to 8] Reference numerals 22 and 23 are pipes, one ends of which are fixed to the connecting pipes 20 and 21 in an externally fitted manner.

The pipe 22 has an upper horizontal part 22a extending straight rearward from a part externally fitted onto the connecting pipe 20, an upper vertical part 22b extending downward from the rear end of the upper horizontal part 22a, and an upper vertical part 22b extending downward from the rear end of the upper horizontal part 22a. 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. And the lower vertical part 2
The lower end of 2d is beveled at an angle of about 45°, and the beveled surface 24 faces toward the rear and lower part.

The other pipe 23 also has an upper horizontal part 23a, an upper vertical part 23b, a lower horizontal part 23c, and a lower vertical part 23.
b are integrally formed, but the lower vertical portion 23
The lower end of d 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 intake pipe.

In addition, the horizontal portions 22 of these pipes 22 and 23
Relatively large recesses 25, 25, . . . are formed near the bent portions of the recesses 25, 22c, 23a, and 23c by protruding the inner bottom surfaces outward, at locations away from the passage through which the air flows. There is.

(c Lens) [FIGS. 1 to 4] A lens 26 is airtightly attached to the front surface of the lamp body 2 so as to cover the front surfaces of the lamp chambers 4, 4.

(d Light bulb) [Figures 1 to 4] 27, 27 are light bulbs.

The light bulb 27 consists of a glass bulb 29 in which a filament 28 is enclosed, and a base 30 on which the glass bulb 29 is supported.

31 is a metal holder wrapped around the rear end of the glass bulb 29, and the holder 31 is attached to the base portion 3.
Support pins 32, 32, . . . protruding from the front end of 0
The glass bulb 29 and the cap portion 30 are thereby connected to each other.

A connector part 33 is integrally formed in the cap part 30 , one end of a contact piece (not shown) is located inside the connector part 33 , and the other end protrudes from the front end of the cap part 30 to extend outside the glass bulb 29 . Connected to lead wire.

A flange 34 is located near the front end of the mouthpiece 30.
are protrudingly provided, and engagement pieces 35, 35,
35 is provided protrudingly. In addition, this engagement piece 35, 3
The widths of the notches 5, 35 approximately match the widths of the notches 7, 7, 7 provided in the surrounding wall 6 formed in the lamp body 2, and the engaging pieces 35, 35, 35 fit in the notches 7, 7, 7.
7 so as to fit snugly.

Reference numeral 36 denotes an O-ring made of an elastic material and attached to the outer peripheral surface of the front end portion of the base portion 27.

Thus, the glass bulb 29 of the light bulb 27 is inserted into the light chamber 4 through the insertion hole 12 of the light bulb mounting plate 11 and the surrounding wall 6. Then, the engaging piece 3 of the light bulb 27
5, 35, and 35 come into contact with the rear surface of the pressing piece 16 of the light bulb mounting plate 11. Then, the entire bulb 27 is rotated so that the engaging pieces 35, 35, 35 move toward the entrances of the introduction slits 19, 19, 19 of the bulb mounting plate 11. Then, the engaging pieces 35, 35,
35 enters the introduction slits 19, 19, 19 while bending the introduction parts 17, 17, 17 slightly backward, and eventually enters the notches 7, 7, 7 provided in the surrounding wall 6.
This state is maintained by the engaging pieces 35, 35, 35 being pressed from behind by the pressing pieces 16, 16, 16 of the light bulb mounting plate 11.

The light bulbs 27, 27 are attached to the lamp body 2 in this way, and the O-rings 36, 36 attached to the bulbs 27, 27 at this time are attached to the surrounding walls 6, 6.
It is compressed between the bulb and the inner peripheral surface of the bulb, making the bulb mounting part airtight.

Therefore, the lamp space 37 defined by the lamp body 2 and the lens 26 is connected to the two pipes 2.
It is communicated with the outside only through 2 and 23. Note that the lamp space 37 is formed with the two lamp chambers 4 communicating with each other.

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

Therefore, the air in the lamp space 37 is forcibly discharged through the pipe 22 due to the negative pressure, and the new air is replenished into the lamp space 37 through the other pipe 23.

In this way, in the above automobile headlamp 1, air flow is generated within the lamp space 37 as the automobile in which it is mounted runs, and this is done while always taking in outside air. It turns out.

Therefore, in the above automobile headlamp 1, even if fogging occurs on the inner surface of the lens 26 or the reflective surface 3 due to the lighting, once the automobile starts running, the light space 37 created thereby will become cloudy. The above-mentioned fogging will be rapidly removed by the flow of air while taking in outside air.

Note that if the inside of the lamp space 37 is communicated with the outside, there is a risk that dust will enter the lamp space 37 and adhere to the reflective surface 3 and the inner surface of the lens 26. 1, since the pipes 22 and 23 each have three bends, the speed of the dust is reduced at these bends, making it difficult for the dust to reach the upper ends of the pipes 22 and 23, making it horizontal. Parts 22a, 22c, 2
It will accumulate in 3a and 23c. In addition, each horizontal portion 22a, 22c, 23a of each pipe 22, 23,
23c has recesses 25, 25, . . . formed near the bent portions, so the dust whose velocity is reduced will accumulate in these recesses 25, 25, . In addition, since the recesses 25, 25, ... are located away from the passage through which air flows, dust once enters the recesses 25, 25, ...
Once the dust enters the recesses 25, 25, . . . , it will not come out of the recesses 25, 25, .

Furthermore, water intrusion is hardly a problem. Furthermore,
Since the lower end of the pipe 22 is beveled, water droplets are less likely to adhere there.

Incidentally, if the pipes 22 and 23 are made removably attachable to the lamp body 2 and replaced periodically, the inside of the lamp space 37 can be further kept clean.

The inner diameters of the pipes 22 and 23 are most preferably in the range of 5 mm to 10 mm. The reason for this is that if the inner diameter is less than 5 mm, there is a risk of clogging due to the surface tension of water droplets adhering to the lower ends of the pipes 22, 23, and if the inner diameter is more than 10 mm, there is a risk that water and dust may easily enter. This is because there is a

Furthermore, it is desirable that the pipes 22 and 23 be connected to the lamp body 2 at the upper end of the lamp body 2. By doing this, the pipe 22,
The length of 23 can be increased, and the effect of preventing the intrusion of dust and the like is enhanced. And pipe 2
When the connecting portions 2 and 23 are located at the upper part of the lamp body 2, when viewed through the lens 26, the connecting holes (the openings on the lamp space 37 side of the connecting pipes 20 and 21) are located at the lower side. It also has the advantage of being less conspicuous.

(G. Effect of the invention) As is clear from the above description, the vehicle lamp of the present invention is a vehicle lamp in which the lamp space defined by the lamp body and the lens is communicated with the outside through a pipe. In the lighting device, the pipe is bent a plurality of times to form at least one horizontal portion extending substantially horizontally, and the inner bottom surface near the bent portion of the horizontal portion protrudes outward from the passage through which air flows. It is characterized by a large recess formed in the removed area.

Therefore, in the vehicular lamp of the present invention, even if dust enters from the tip of the pipe, the dust slows down at the plurality of bends and is likely to be left on the horizontal portion. In addition, since a recess is formed near the bend of the horizontal part, the dust that has slowed down tends to accumulate in this recess, and furthermore, since the recess is located away from the passage through which air flows, Dust that has once entered the recess will not come out of the recess due to air flow, which prevents dust from entering the lamp space and staining the inner surface of the lens, reflective surface, etc. .

In the above embodiment, two pipes are provided, and a negative pressure is generated at the lower end of one of the pipes, thereby forcibly generating air flow within the lamp space. However, the application of the present invention is not limited to such things.
The present invention can be widely applied to vehicle lamps in which the lamp space is communicated with the outside through a pipe.

Further, in the above embodiment, the pipe is provided with two horizontal portions, but it is sufficient to provide only one horizontal portion. Even if two or more horizontal parts are provided, it is sufficient to provide a recess in one horizontal part, and the number of recesses provided in one horizontal part is one as in the illustrated embodiment. It is not limited to , but a plurality of them may be provided.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the vehicle lamp according to the present invention, and FIG. 1 is a partially exploded perspective view, and FIG.
The figure is an enlarged horizontal sectional view, Fig. 3 is an enlarged sectional view along the - line of Fig. 2, and Fig. 4 is an enlarged sectional view of main parts.
Figures 5 to 7 show one pipe, Figure 5 is a rear view, Figure 6 is a side view, Figure 7 is a sectional view taken along the - line in Figure 5, and Figure 8 is the other pipe. FIG. Explanation of symbols, 1... Vehicle lamp, 2... Lamp body, 22, 23... Pipe, 22a, 22
c, 23a, 23c...horizontal part, 25...recessed part,
26...lens, 37...light space.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicular lamp in which a lamp space defined by a lamp body and a lens is communicated with the outside through a pipe, wherein the pipe is bent multiple times to form at least one A vehicle characterized by forming a horizontal portion that extends substantially horizontally, and having an inner bottom surface near a bent portion of the horizontal portion protrude outward to form a larger recess at a location away from a passage through which air flows. Lighting equipment.