JP2023057651A - light source module - Google Patents

Abstract

To prevent occurrence of cloudiness of a light source during lighting without causing a rise of manufacturing costs of a lamp for a vehicle and with versatility secured.SOLUTION: A light source module comprises: a light source for emitting light; a socket housing having an internal space and formed with a discharge hole which provides communication between the internal space and an external space; a shape memory spring which is arranged in the internal space and deformed by a change in temperature; an opening/closing valve operated by the deformation of the shape memory spring and opening and closing the discharge hole; and a drying agent arranged in the internal space and absorbing moisture. The opening/closing valve is operated in a direction of opening the discharge hole by the deformation of the shape memory spring caused by heat which is generated at lighting of the light source, and moisture absorbed by the action of heat generated at the lighting of the light source on the drying agent is discharged from the drying agent.SELECTED DRAWING: Figure 4

Description

The present invention relates to a technical field of a light source module attached to a lamp housing or the like.

A vehicle lamp includes, for example, a light source module that is detachable from a lamp housing composed of a lamp housing and a cover. Light emitted from the light source of the light source module is transmitted through the cover to the outside. There is something that is aimed at.

On the other hand, in a vehicle lamp, since moisture is present in the air inside the lamp outer casing, the ambient environment, etc., may expose the moisture from the air to the cover and the lamp outer casing, which constitute a part of the lamp outer casing. It may adhere to the inner lens, etc., which is arranged inside the lens, and cause fogging.

In particular, in the light source module, the lamp housing, cover, and the like are often made of a resin material such as polycarbonate.

If such fogging occurs, there is a risk that the light distribution performance will be affected, or that sufficient brightness of emitted light will not be ensured. In particular, during the summer season when the temperature is high, dew condensation easily occurs due to sudden temperature changes, and it is necessary to prevent the occurrence of fogging by releasing sufficient moisture to the outside space when the light source is turned on. .

Therefore, in order to prevent such fogging, a vehicle lamp has a structure in which a ventilation hole is formed in the lamp housing and communicated with the outside space, and moisture is discharged to the outside space through the ventilation hole using a blower fan. (See Patent Document 1, for example).

JP 2019-46788 A

However, in the configuration described in Patent Document 1, it is necessary to form a ventilation structure including a blower fan and a ventilation hole at each position according to the vehicle type and the internal structure of the lamp housing, which increases the manufacturing cost. It gets expensive.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a light source module that ensures versatility and prevents the occurrence of fogging when the light source is turned on without increasing the manufacturing cost of the vehicle lamp.

A light source module according to the present invention includes a light source that emits light, a socket housing having an internal space and an emission hole that communicates between the internal space and the external space, and a socket housing that is disposed in the internal space and deforms due to changes in temperature. an on-off valve that is operated by deformation of the shape-memory spring to open and close the discharge hole; and a desiccant that is disposed in the internal space and absorbs moisture. The deformation of the shape-memory spring causes the on-off valve to operate in the direction of opening the release hole, and the heat generated when the light source is turned on acts on the desiccant to release the absorbed moisture from the desiccant. .

As a result, the on-off valve is moved by the shape memory spring that is deformed by the heat generated when the light source is turned on, the release hole is opened, and the moisture absorbed by the desiccant is released from the on-off valve to the external space.

According to the present invention, the shape-memory spring is deformed by the heat generated when the light source is turned on, and the on-off valve is operated to open the release hole, and the heat generated when the light source is turned on causes the moisture released from the desiccant material to be released. Since the light is emitted from the emission hole to the external space, it is possible to secure versatility and prevent fogging when the light source is turned on without raising the manufacturing cost of the vehicle lamp.

The embodiment of the present invention is shown together with FIGS. 2 to 6, and this figure is a cross-sectional view of a vehicle lamp. It is a perspective view of a light source module. It is a sectional view of a light source module. FIG. 4 is a cross-sectional view of the light source module with the first light source turned on; FIG. 10 is a cross-sectional view showing a state in which the second light source is turned on in the light source module with another configuration; FIG. 11 is a cross-sectional view showing a state in which the first light source is turned on in the light source module with another configuration;

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated with reference to an accompanying drawing. In the following description, the direction of the optical axis of light emitted from the light source module is the front-rear direction, and the direction of light emission is the front. Note that the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

<Structure of vehicle lamp>
A vehicle lamp 1 includes a lamp housing 2 having an opening at its front end and a cover 3 closing the opening of the lamp housing 2 (see FIG. 1). A lamp housing 4 is formed by the lamp housing 2 and the cover 3 , and a space inside the lamp housing 4 is formed as a lamp chamber 5 .

A mounting hole 2a is formed through the lamp housing 2 in the front-rear direction. A plurality of engaging grooves (not shown) are formed in the lamp housing 2 so as to be spaced apart in the circumferential direction around the mounting hole 2a.

A light guide 6 made of, for example, a transparent resin material or glass material is arranged in the lamp chamber 5 . The light guide 6 has one end surface formed as an incident surface 6a and a forward surface formed as an output surface 6b. When the light is incident on the light guide member 6 from the incident surface 6a, the incident light is guided, emitted forward from the emitting surface 6b, transmitted through the cover 3, and irradiated to the outside.

The structure arranged in the lamp chamber 5 is not limited to the light guide 6, and other members such as an inner lens may be arranged in the lamp chamber 5. FIG.

<Configuration of light source module>
A light source module 7 is detachably attached to the lamp housing 2 . The light source module 7 is composed of a socket housing 8 functioning as a housing and necessary parts attached to or supported by the socket housing 8 (see FIGS. 2 and 3).

The socket housing 8 is formed in a shape having an internal space 8a. For example, the light source arrangement portion 9 and the mechanism arrangement portion 10, both of which are made of a metal material with high thermal conductivity, are joined together at the front and back. However, the socket housing 8 may have the light source arrangement portion 9 and the mechanism arrangement portion 10 integrally formed.

An inflow hole 11 is formed through the light source placement portion 9 in the left and right direction. An insertion hole 12 is formed in the light source arrangement portion 9 and is opened in the front-rear direction. A surface of the light source placement portion 9 around the front end of the insertion hole 12 is formed as a stopper surface 9a, and a surface around the rear end of the insertion hole 12 is formed as a spring receiving surface 9b.

The upper surface of the light source arrangement portion 9 is formed as an inclined surface 9c except for the rear end portion, and the inclined surface 9c is inclined so as to be displaced downward as it goes forward.

A first substrate 13 is attached to the upper surface of the light source arrangement portion 9, for example, on the rear side of the inclined surface 9c. A first light source 14 is mounted on the upper surface of the first substrate 13 . For example, an LED (Light Emitting Diode) is used as the first light source 14 .

A reflector 15 is attached to the upper surface of the light source arrangement portion 9 . The reflector 15 is attached at a position covering from above the first substrate 13 and a portion of the inclined surface 9c except for a portion thereof. Therefore, the light emitted from the first light source 14 is reflected by the inner surface of the reflector 15, condensed near the front end of the inclined surface 9c, and enters the light guide 6 through the incident surface 6a.

A second substrate 16 is arranged, for example, at the upper end portion of the front surface of the light source arrangement portion 9 . A second light source 17 is mounted on the front surface of the second substrate 16 . For example, an LED is used as the second light source 17 . The light emitting surface of the second light source 17 is positioned at substantially the same position as the light converging position of the light emitted from the first light source 14 .

In addition, in the light source module 7, an arrangement recess opening forward may be formed in the front end portion of the light source arrangement portion 9, and the second substrate 16 may be arranged in the arrangement recess.

As described above, in the light source module 7, the light condensing position of the light emitted from the first light source 14 and the light emitting surface of the second light source 17 are at substantially the same positions. The light distribution pattern formed by the light emitted from the second light source 17 and the light distribution pattern formed by the light emitted from the second light source 17 are substantially the same light distribution pattern.

In the vehicle lamp 1, the first light source 14 and the second light source 17 are controlled by a lighting/lighting control circuit (not shown), and the first light source 14 and the second light source 17 are selectively turned on. control is performed. Therefore, when the first light source 14 is turned on, the second light source 17 is turned off, and when the first light source 14 is turned off, the second light source 17 is turned on.

The mechanism placement portion 10 has a cylindrical peripheral surface portion 18, a first surface portion 19 which is continuous with the front end portion of the peripheral surface portion 18 and faces the front-rear direction, and a second surface portion 19 which is continuous with the rear end portion of the peripheral surface portion 18 and faces the front-rear direction. and a surface portion 20 of A plurality of engaging protrusions 21 projecting outward from the outer peripheral surface of the peripheral surface portion 18 are provided in the mechanism placement portion 10 so as to be spaced apart in the circumferential direction.

An arrangement space 22 is formed inside the mechanism arrangement portion 10 . In the mechanism arrangement portion 10 , a communication hole 23 is formed through the first surface portion 19 in the front-rear direction, and a release hole 24 is formed through the second surface portion 20 in the front-rear direction. The diameter of the communication hole 23 is made larger than the diameter of the insertion hole 12 formed in the light source placement portion 9 .

An internal space 8a is formed by the inflow hole 11, the insertion hole 12, the arrangement space 22, and the communication hole 23 formed in the socket housing 8 described above.

The light source arrangement portion 9 and the mechanism arrangement portion 10 are coupled with the central axis of the insertion hole 12 and the central axis of the communication hole 23 aligned.

A drying material 25 is arranged in the arrangement space 22 . The desiccant 25 has a function of absorbing moisture. Moisture absorbed by the desiccant 25 is released when the desiccant 25 is heated. The desiccant 25 is arranged, for example, in a state of being attached to approximately the upper half portion of the inner peripheral surface of the peripheral surface portion 18 .

An on-off valve 26 is movably supported in the front-rear direction by a support portion (not shown) in the socket housing 8 . The on-off valve 26 includes a shaft portion 27 extending in the front-rear direction, a substantially disc-shaped first opening/closing portion 28 attached to the front end portion of the shaft portion 27 , and a substantially circular opening portion 28 attached to the rear end portion of the shaft portion 27 . It has a plate-shaped second opening/closing portion 29 and a spring receiving portion 30 attached to an intermediate portion of the shaft portion 27 in the front-rear direction.

The on-off valve 26 has a first opening/closing portion 28 positioned in the inlet 11 of the light source placement portion 9 , a second opening/closing portion 29 positioned behind the mechanism placement portion 10 , and a spring receiving portion 30 positioned in the placement space 22 . It is supported by the socket housing 8 in this state.

A shape memory spring 31 is arranged in a portion extending from the communication hole 23 to the arrangement space 22 . The shape memory spring 31 is, for example, a coil spring, and when the shaft portion 27 of the on-off valve 26 is inserted, the front and rear end portions of the shape-memory spring 31 contact the spring receiving surface 9b of the light source arrangement portion 9 and the spring receiving portion 30 of the on-off valve 26, respectively. installed.

The shape memory spring 31 has a function of returning to its original state when heated, and is compressed with respect to its original state before being heated (see FIG. 3).

The light source module 7 configured as described above is inserted from the rear into the mounting hole 2a of the lamp housing 2, the portion other than the rear end portion is positioned in the lamp chamber 5, and the front end is located on the incident surface 6a of the light guide 6. located in the vicinity (see FIG. 1).

When the light source module 7 is inserted into the mounting hole 2a and rotated in one direction around the axis, the plurality of engaging protrusions 21 are inserted into the engaging grooves of the lamp housing 2 and engaged with the lamp housing 2. and attached to the lamp housing 4 . Conversely, the light source module 7 is removed from the lamp housing 4 by being rotated in the opposite direction and pulled out from the mounting hole 2a.

<Operation of each part in the socket housing>
The operation of the on-off valve 26 and the shape memory spring 31 when the first light source 14 and the second light source 17 are turned on and off will be described below (see FIGS. 3 and 4).

In the vehicle lamp 1, as described above, control is performed to selectively turn on the first light source 14 and the second light source 17, and when the first light source 14 is turned on, the second light source 17 is turned on. is turned off, and when the first light source 14 is turned off, the second light source 17 is turned on.

When the first light source 14 and the second light source 17 are turned off, the shape memory spring 31 is compressed with respect to its original state, and the on-off valve 26 is positioned at the forward movement end (see FIG. 3). Accordingly, the opening/closing valve 26 has a first opening/closing portion 28 positioned forwardly away from the insertion hole 12 and a second opening/closing portion 29 pressed against the rear surface of the mechanism placement portion 10 to close the discharge hole 24 .

At this time, since the first opening/closing portion 28 is positioned forwardly away from the insertion hole 12, the inflow hole 11 and the arrangement space 22 are communicated with each other through the insertion hole 12 and the communication hole 23. Air in the chamber 5 is taken in through the inlet 11 and flowed into the arrangement space 22 . Therefore, moisture contained in the air in the lamp chamber 5 is absorbed by the desiccant 25 arranged in the arrangement space 22 .

When the first light source 14 is turned on while the first light source 14 and the second light source 17 are turned off, heat is generated in the first light source 14 and the first substrate 13, and the generated heat The heat is transmitted from the placement portion 9 to the mechanism placement portion 10 (see heat P indicated by an arrow in FIG. 4). When the heat generated when the first light source 14 is turned on is transferred to the light source arrangement portion 9 and the mechanism arrangement portion 10, the shape memory spring 31 and the drying material 25 are heated by the transferred heat.

The shape memory spring 31 is deformed so as to return to its original state by being heated, and is expanded from the compressed state (see FIG. 4). When the shape memory spring 31 is expanded, the spring receiving portion 30 is pressed from the front by the shape memory spring 31 and the on-off valve 26 is moved rearward. The first opening/closing portion 28 of the opening/closing valve 26 moved backward is pressed against the stopper surface 9a of the light source placement portion 9 and stopped at the rear movement end. Therefore, the second opening/closing portion 29 is separated rearward from the rear surface of the mechanism placement portion 10, and the discharge hole 24 is opened.

At this time, since the desiccant 25 is heated by the heat generated when the first light source 14 is turned on, the absorbed moisture is released from the desiccant 25 into the arrangement space 22, and the moisture released into the arrangement space 22 is released. It is discharged from the discharge hole 24 to the external space. Incidentally, when the moisture is discharged from the desiccant 25 into the arrangement space 22, since the insertion hole 12 is closed by the first opening/closing part 28, the moisture released from the desiccant 25 flows into the inflow hole 11 side. Therefore, moisture does not flow into the lamp chamber 5 through the inflow hole 11.例文帳に追加

On the other hand, when switching between lighting and extinguishing is performed by the lighting and extinguishing control circuit to turn off the first light source 14 and turn on the second light source 17, heat is generated in the second light source 17 and the second substrate 16. The generated heat is transmitted to the light source arrangement portion 9 (see heat Q indicated by an arrow in FIG. 3).

At this time, since the distance from the second light source 17 to the shape memory spring 31 is longer than the distance from the first light source 14 to the shape memory spring 31, the shape memory of the heat generated when the second light source 17 is turned on. The amount of transmission to the spring 31 is small. Further, since the heat generated when the first light source 14 is turned on is no longer applied and the amount of heat applied to the shape memory spring 31 is small, the shape memory spring 31 is compressed again, and the on-off valve 26 is moved to the forward movement end. (see Figure 3). When the opening/closing valve 26 is moved to the front movement end, the first opening/closing portion 28 is separated forward from the stopper surface 9a to open the insertion hole 12 and the discharge hole 24 is opened by the second opening/closing portion 29. blocked. Therefore, the air in the lamp chamber 5 flows from the inflow hole 11 into the arrangement space 22 through the insertion hole 12 and the communication hole 23, and the moisture contained in the air can be absorbed by the desiccant 25 arranged in the arrangement space 22. be made.

Also, when the second light source 17 is turned on while the first light source 14 and the second light source 17 are turned off, the heat generated when the second light source 17 is turned on is transmitted to the shape memory spring 31. Since the amount is small, the state in which the shape memory spring 31 is not stretched, the insertion hole 12 is opened, and the discharge hole 24 is closed by the second opening/closing portion 29 is maintained. Therefore, the air in the lamp chamber 5 flows from the inflow hole 11 into the arrangement space 22 through the insertion hole 12 and the communication hole 23, and the moisture contained in the air can be absorbed by the desiccant 25 arranged in the arrangement space 22. be made.

When switching between lighting and extinguishing is performed by the lighting and extinguishing control circuit to turn off the second light source 17 and turn on the first light source 14, the first light source 14 and the second light source 17 are turned off. Heat generated by turning on the first light source 14 is transferred from the light source arrangement portion 9 to the mechanism arrangement portion 10 in the same manner as when the first light source 14 is turned on in the state. Accordingly, the shape memory spring 31 is extended to open the release hole 24, and the absorbed moisture is released from the desiccant 25 to the arrangement space 22, and the moisture released to the arrangement space 22 is released from the release hole 24 to the external space. released to

As described above, in the light source module 7 , the shape memory spring 31 is expanded when the first light source 14 is turned on, so that the release hole 24 is opened by the on-off valve 26 , and the shape memory spring 31 is moved to the first light source 14 . The discharge hole 24 is closed by the on-off valve 26 by being compressed when the is extinguished.

Therefore, since the opening and closing valve 26 is moved in the opposite direction by the expansion and contraction of the shape memory spring 31 to open and close the discharge hole 24, the discharge hole 24 can be reliably opened and closed with a simple structure.

Further, since the second light source 17 is arranged at the front end portion of the light source arrangement portion 9 and the shape memory spring 31 that expands and contracts due to the action of temperature is arranged inside the mechanism arrangement portion 10, the shape of the second light source 17 and the shape The distance of the memory spring 31 is lengthened. Therefore, the shape memory spring 31 is less affected by the heat generated when the second light source 17 is turned on, and when the second light source 17 is turned on, the shape memory spring 31 is reliably held at the front end of the movement, and the lamp chamber 5 is closed. The desiccant 25 can surely absorb the moisture contained in the air.

<Other light source modules>
Although the above describes an example of a light source module 7 having shape memory springs 31 that are compressed relative to the original state in the pre-heated state, instead of the light source module 7 the pre-heated state is described. A light source module 7A having a shape memory spring 31A that is stretched relative to the original state in .

In this case, a spring receiving surface 10a is formed instead of the spring receiving surface 9b, and a spring receiving portion 30A shared with the first opening/closing portion 28 is provided instead of the spring receiving portion 30. FIG. The spring receiving surface 10 a is a portion of the front surface of the mechanism placement portion 10 around the communication hole 23 .

In this configuration, an on-off valve 26A is used in place of the on-off valve 26. The on-off valve 26A has a shaft portion 27, a first opening/closing portion 28, and a second opening/closing portion 29, and a spring receiving portion 30A is a second opening/closing portion. 1 and the opening/closing portion 28 are shared.

The shape memory spring 31A has front and rear end portions attached to the spring bearing portion 30A of the on-off valve 26A and the spring bearing surface 10a of the mechanism arrangement portion 10, respectively.

The shape memory spring 31A has a function of returning to its original state when heated, and is stretched with respect to its original state before being heated.

When the first light source 14 and the second light source 17 are extinguished, the shape memory spring 31A is stretched with respect to the original state, the opening/closing valve 26A is positioned at the front moving end, and the second opening/closing portion 29 is closed. The ejection hole 24 is closed by being pressed against the rear surface of the mechanism arrangement portion 10 (see FIG. 5).

At this time, since the first opening/closing portion 28 is positioned forwardly away from the insertion hole 12 , the air in the lamp chamber 5 is taken in through the inflow hole 11 and flows into the arrangement space 22 . Therefore, moisture contained in the air in the lamp chamber 5 is absorbed by the desiccant 25 arranged in the arrangement space 22 .

When the first light source 14 is turned on while the first light source 14 and the second light source 17 are turned off, heat generated in the first light source 14 and the first substrate 13 causes the shape memory spring 31A to The desiccant 25 is heated (see heat P indicated by an arrow in FIG. 6).

When the shape memory spring 31A is heated, it is deformed so as to return to its original state, and is compressed from its expanded state (see FIG. 6). By compressing the shape memory spring 31A, the first opening/closing portion 28 of the opening/closing valve 26A is pressed against the stopper surface 9a of the light source placement portion 9, and the second opening/closing portion 29 moves backward from the rear surface of the mechanism placement portion 10. The discharge hole 24 is opened by being separated.

At this time, since the desiccant 25 is heated by the heat generated when the first light source 14 is turned on, the absorbed moisture is released from the desiccant 25 through the arrangement space 22 to the external space through the release holes 24 . .

On the other hand, when the first light source 14 is turned off and the second light source 17 is turned on, the heat generated when the second light source 17 is turned on is transmitted to the light source arrangement portion 9, but the second light source 17 to the shape memory spring 31A is longer than the distance from the first light source 14 to the shape memory spring 31A. See heat Q indicated by an arrow in FIG. Further, the heating due to the heat generated when the first light source 14 is turned on is stopped, the shape memory spring 31A is expanded again, and the on-off valve 26A is moved to the forward movement end (see FIG. 5). Accordingly, the insertion hole 12 is opened and the release hole 24 is closed by the second opening/closing portion 29, so that the desiccant 25 can absorb moisture contained in the air in the lamp chamber 5. FIG.

Also, when the second light source 17 is turned on while the first light source 14 and the second light source 17 are turned off, the heat generated when the second light source 17 is turned on is transferred to the shape memory spring 31A. Since the amount is small, the state in which the shape memory spring 31A is not compressed, the insertion hole 12 is opened, and the release hole 24 is closed by the second opening/closing portion 29 is maintained. Therefore, the air in the lamp chamber 5 flows into the arrangement space 22, and the moisture contained in the air is made to be able to be absorbed by the desiccant 25 arranged in the arrangement space 22. - 特許庁

When switching between lighting and extinguishing is performed by the lighting and extinguishing control circuit to turn off the second light source 17 and turn on the first light source 14, the first light source 14 and the second light source 17 are turned off. Heat generated by turning on the first light source 14 is transferred from the light source arrangement portion 9 to the mechanism arrangement portion 10 in the same manner as when the first light source 14 is turned on in the state. Accordingly, the shape memory spring 31A is compressed to open the release hole 24, and the absorbed moisture is released from the desiccant 25 into the arrangement space 22, and the moisture released into the arrangement space 22 is released from the release hole 24 into the external space. released to

As described above, in the light source module 7A, the shape memory spring 31A is compressed when the first light source 14 is turned on, so that the discharge hole 24 is opened by the on-off valve 26A, and the shape memory spring 31A is compressed when the first light source 14 is turned on. is extinguished, the discharge hole 24 is closed by the on-off valve 26A.

Therefore, since the on-off valve 26A is moved in the opposite direction by the expansion and contraction of the shape memory spring 31A to open and close the discharge hole 24, the discharge hole 24 can be reliably opened and closed with a simple structure.

<Summary>
As described above, in the light source modules 7 and 7A, the shape memory springs 31 and 31A are deformed by the heat generated when the first light source 14 is turned on, causing the on-off valves 26 and 26A to open the discharge hole 24. The absorbed moisture is released from the desiccant 25 by the action of the heat generated when the first light source 14 is turned on.

Therefore, it is not necessary to form a ventilation structure including a blower fan and a breathing hole at each position according to the vehicle type and the internal structure of the lamp housing, and the moisture is sufficiently released to the external space when the first light source 14 is turned on. It becomes possible to do As a result, versatility can be ensured, and fogging can be prevented when the first light source 14 is turned on without increasing the manufacturing cost of the vehicle lamp 1 .

Further, a second light source 17 having a longer distance to the shape memory springs 31 and 31A than the first light source 14 is provided, and the light distribution patterns formed by the first light source 14 and the second light source 17 are the same. and the lighting of the first light source 14 and the lighting of the second light source 17 are selectively performed.

Therefore, in a state in which the same light distribution pattern is formed, the release holes 24 are opened and closed by the on-off valves 26 and 26A, and moisture is absorbed by the desiccant 25 and released from the desiccant 25 to the external space. Therefore, fogging during lighting can be prevented without affecting the light distribution performance.

Further, the on-off valves 26, 26A are provided with shafts 27 extending in the expansion and contraction directions of the shape memory springs 31, 31A, and the shafts 27 are inserted through the shape memory springs 31, 31A.

Accordingly, since the shape memory springs 31 and 31A are positioned around the shaft portion 27, the space for arranging the shape memory springs 31 and 31A in the internal space 8a is reduced, and the size of the light source modules 7 and 7A can be reduced.

<Others>
An example of the light source module 7 provided with the first light source 14 and the second light source 17 has been described above. However, in the present invention, only the first light source 14 is provided, and when the first light source 14 is turned on, the shape memory springs 31 and 31A are heated and the opening/closing valves 26 and 26A are operated to open the discharge hole 24. It is also possible to apply a configuration in which the shape memory springs 31 and 31A are not heated and the discharge hole 24 is closed by the operation of the on-off valves 26 and 26A when one light source 14 is turned off.

7 Light source module 8 Socket housing 8a Internal space 14 First light source 17 Second light source 22 Arrangement space 25 Drying material 26 On-off valve 27 Shaft 31 ... Shape memory spring 7A ... Light source module 26A ... On-off valve 31A ... Shape memory spring

Claims (5)

a light source that emits light;
a socket housing having an internal space and having a discharge hole communicating between the internal space and the external space;
a shape memory spring arranged in the internal space and deformed by a change in temperature;
an on-off valve that is operated by deformation of the shape memory spring to open and close the discharge hole;
A drying material arranged in the internal space and absorbing moisture,
The deformation of the shape memory spring due to the heat generated when the light source is turned on causes the on-off valve to operate in the direction of opening the discharge hole, and the heat generated when the light source is turned on acts on the desiccant material to dry the absorbed moisture. A light source module emitted from the material. wherein said light source is provided as a first light source,
A second light source having a longer distance to the shape memory spring than the first light source is provided,
Light distribution patterns formed by the first light source and the second light source are made the same,
The light source module according to claim 1, wherein lighting of the first light source and lighting of the second light source are selectively performed. A coil spring is used as the shape memory spring,
The discharge hole is opened by the on-off valve by extending the shape memory spring when the first light source is turned on,
The light source module according to claim 2, wherein the release hole is closed by the on-off valve by compressing the shape memory spring when the first light source is turned off. A coil spring is used as the shape memory spring,
The release hole is opened by the on-off valve by compressing the shape memory spring when the first light source is turned on,
3. The light source module according to claim 2, wherein the release hole is closed by the on-off valve by extending the shape memory spring when the first light source is turned off. The on-off valve is provided with a shaft portion extending in the expansion and contraction direction of the shape memory spring,
The light source module according to claim 3 or 4, wherein the shaft portion is inserted through the shape memory spring.

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