CN217988028U - Ultraviolet irradiation device for vehicle - Google Patents

Abstract

The utility model provides a can restrain the vehicle ultraviolet irradiation device of electromagnetic radiation. An ultraviolet irradiation device for a vehicle according to an embodiment includes: a discharge lamp capable of emitting ultraviolet rays; a lighting circuit capable of applying a drive voltage of a predetermined frequency to the discharge lamp; a housing having an internal space for accommodating the discharge lamp and the lighting circuit, and having a hole facing the discharge lamp; and a shield which is provided on at least one of the outer wall of the frame body and the inner wall of the frame body and has conductivity.

Description

Ultraviolet irradiation device for vehicle

Technical Field

The utility model discloses an embodiment relates to an ultraviolet irradiation device for vehicle.

Background

There is an ultraviolet irradiation apparatus including a discharge lamp that emits ultraviolet light. Conventionally, such an ultraviolet irradiation apparatus is used for curing of ultraviolet curable inks, paints, adhesives, and the like, surface modification of materials, photo-alignment of liquid crystals, and the like. Further, since ultraviolet rays have a bactericidal action, ultraviolet irradiation apparatuses are also used in some cases for sterilizing bacteria and inactivating viruses adhering to the surface of a component.

In recent years, with the increase of health consciousness, it has been desired to purify the atmosphere in the vehicle interior, the surfaces of articles in the vehicle interior, and the like in a relatively narrow closed space such as the vehicle interior and the vehicle interior of a railway vehicle.

When the discharge lamp is turned on, electromagnetic waves may be emitted from the ultraviolet irradiation device. In addition, in the case where the ultraviolet irradiation device is a vehicle ultraviolet irradiation device installed in an automobile, a railway vehicle, or the like, the vehicle ultraviolet irradiation device is often installed in a narrow space such as a vehicle interior together with electronic equipment for running the vehicle or the like. Therefore, the distance between the vehicle ultraviolet irradiation device and the electronic device is reduced, and the electromagnetic wave emitted from the vehicle ultraviolet irradiation device is likely to enter the electronic device. If electromagnetic waves are incident on the electronic device, they may become electromagnetic noise, which may cause malfunction of the electronic device.

In view of this, development of an ultraviolet irradiation device for a vehicle which suppresses emission of electromagnetic waves has been desired.

Patent document 1: japanese laid-open patent publication No. 2009-195825

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide an ultraviolet irradiation device for a vehicle, which can suppress the radiation of electromagnetic waves.

The lighting device for a vehicle according to an embodiment includes: a discharge lamp capable of emitting ultraviolet rays; a lighting circuit capable of applying a drive voltage of a predetermined frequency to the discharge lamp; a housing having an internal space for accommodating the discharge lamp and the lighting circuit, and having a hole facing the discharge lamp; and a shield which is provided on at least one of the outer wall of the frame body and the inner wall of the frame body and has conductivity.

According to an embodiment of the present invention, there is provided an ultraviolet irradiation device for a vehicle capable of suppressing radiation of electromagnetic waves.

Drawings

Fig. 1 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device according to the present embodiment.

Fig. 2 isbase:Sub>A schematic sectional view of the ultraviolet irradiation device forbase:Sub>A vehicle of fig. 1, taken along linebase:Sub>A-base:Sub>A.

Fig. 3 is a schematic sectional view of the ultraviolet irradiation device for a vehicle of fig. 1, taken along line B-B.

In fig. 4, (a) to (d) are schematic plan views illustrating the form of the window.

Fig. 5 is a schematic enlarged view of a portion C in fig. 2.

Fig. 6 is a schematic enlarged view of a portion D in fig. 2.

Fig. 7 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device according to another embodiment.

Fig. 8 is a schematic sectional view of the ultraviolet irradiation device for a vehicle of fig. 7, taken along line E-E.

Fig. 9 is a schematic sectional view of the vehicle ultraviolet irradiation device of fig. 7, taken along line F-F.

Fig. 10 is a schematic enlarged view of a portion G in fig. 8.

In the figure: 1-vehicle ultraviolet irradiation device, 1 a-vehicle ultraviolet irradiation device, 2-frame, 2 a-connection part, 3-substrate, 4-discharge lamp, 5-lamp shade, 6-lighting circuit, 7-window, 8-shield, 8 a-shield, 8 b-shield, 21-first part, 22-second part, 22 a-hole, 9-partition.

Detailed Description

Hereinafter, embodiments will be described by way of example with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

The vehicle ultraviolet irradiation device according to the present embodiment may be installed in an automobile, a railway vehicle, or the like. For example, the vehicle ultraviolet irradiation device may be installed in a car interior, a trunk, or the like, or may be installed in a compartment of a railway vehicle, or the like. However, the installation location of the vehicle ultraviolet irradiation device is not limited to the example.

Fig. 1 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device 1 according to the present embodiment.

Fig. 2 isbase:Sub>A schematic cross-sectional view of the vehicle ultraviolet irradiation device 1 of fig. 1 taken along linebase:Sub>A-base:Sub>A.

Fig. 3 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device 1 of fig. 1 taken along line B-B.

As shown in fig. 1 to 3, the vehicle ultraviolet irradiation device 1 includes, for example, a housing 2, a substrate 3, a discharge lamp 4, a lamp cover 5, a lighting circuit 6, a window 7, and a cover 8.

The housing 2 has a box shape and a space for accommodating the substrate 3, the discharge lamp 4, the lamp cover 5, the lighting circuit 6, the window 7, and the partition 9, for example, therein. The planar shape of the housing 2 may be a quadrangle, for example. However, the planar shape of the housing 2 may be changed as appropriate depending on the installation space of the ultraviolet irradiation device 1 for a vehicle. For example, the planar shape of the housing 2 may be a shape formed by a curve such as a circle or an ellipse, a shape formed by a curve or a straight line, or the like. The thickness T of the housing 2 may be set smaller than the planar size of the housing 2. If the thickness dimension T of the housing 2 is set to be small, it is easy to install the ultraviolet irradiation device 1 for a vehicle together with an electronic device used for vehicle driving or the like.

The housing 2 may be divided into a plurality of parts. In the vehicle ultraviolet irradiation device 1 illustrated in fig. 1 to 3, the housing 2 is divided into two parts in the thickness direction of the housing 2. When the housing 2 is divided into two parts in the thickness direction of the housing 2, the substrate 3, the discharge lamp 4, the globe 5, and the lighting circuit 6 can be easily mounted inside the housing 2, and the window 7 and the partition 9 can be easily mounted on the inner wall of the housing 2.

For example, the frame body 2 has a first portion 21 and a second portion 22.

The first portion 21 is a space in which the substrate 3, the discharge lamp 4, the globe 5, and the lighting circuit 6 are mounted, for example.

The second portion 22 is, for example, a cover covering the opening side of the first portion 21. The second portion 22 is attached with, for example, a window 7 and a partition 9. The second portion 22 may be provided with a hole 22a for emitting ultraviolet rays. The hole 22a is provided at a position facing the discharge lamp 4, for example.

The second portion 22 may be removably disposed on the first portion 21. For example, the second portion 22 may be detachably provided on the first portion 21 by an elastic force. For example, the second portion 22 may be detachably provided to the first portion 21 by a fastening member such as a screw. The first portion 21 and the second portion 22 illustrated in fig. 1 to 3 are detachably connected to each other based on an elastic force generated by fitting the opening portions to each other.

The second portion 22 may be fixed to the first portion 21 with an adhesive or the like. However, if the second portion 22 is detachably provided on the first portion 21, maintenance such as replacement of the discharge lamp 4 becomes easy.

As shown in fig. 2 and 3, the substrate 3, the discharge lamp 4, and the lighting circuit 6 are provided inside the housing 2. Therefore, if the first portion 21 and the second portion 22 are made of metal such as aluminum alloy, there is a possibility that electric leakage, short circuit, or the like may occur. Therefore, the frame 2 is preferably made of resin having insulating properties. Further, if the housing 2 is made of resin having insulating properties, the weight of the vehicle ultraviolet irradiation device 1 can be reduced and the manufacturing cost can be reduced. The material of the second portion 22 may be the same as or different from the material of the first portion 11.

The substrate 3 has a plate shape. The substrate 3 is provided on the first portion 21 via a spacer 31 or the like, for example. Instead of the spacer 31, a convex portion may be provided on the first portion 21, and the substrate 3 may be provided on the convex portion. The material of the substrate 3 is not particularly limited. The substrate 3 may be made of, for example, ceramics such as alumina or aluminum nitride, or organic materials such as phenol paper or glass epoxy. The substrate 3 may be a metal core substrate in which the surface of a metal plate is coated with an insulating material.

The discharge lamp 4 is located between the substrate 3 and the second portion 22. The discharge lamp 4 is arranged at a position facing the hole 22a of the second portion 22. The discharge lamp 4 is detachably provided on a pair of terminal holders 41. A pair of terminal holders 41 are provided on the substrate 3, for example. Although fig. 2 and 3 illustrate the case where one discharge lamp 4 is provided, a plurality of discharge lamps 4 may be provided. At least one discharge lamp 4 may be provided.

The discharge lamp 4 is not particularly limited as long as it can irradiate ultraviolet rays. As the discharge lamp 4, for example, a mercury lamp, a metal halide lamp, a dielectric barrier discharge lamp, or the like can be used. The discharge lamp 4 has, for example, a shape extending in one direction. If the discharge lamp 4 having a shape extending in one direction is used, the thickness dimension T of the housing 2 can be easily reduced.

The lamp shade 5 is located between the substrate 3 and the second portion 22. The lamp cover 5 is provided on the substrate 3, for example. The globe 5 has a box shape, and an end portion thereof opposite to the substrate 3 side is opened. The opening 5a of the lamp housing 5 faces the hole 22a of the second portion 22. The discharge lamp 4 and the pair of terminal holders 41 may be provided inside the lamp housing 5. The lamp cover 5 is made of resin having insulation properties, for example. The material of the globe 5 may be the same as that of the frame 2, for example. Since the globe 5 is exposed to the ultraviolet rays emitted from the discharge lamp 4, it is preferable to use a material having higher resistance to the ultraviolet rays than the material of the housing 2.

The lamp cover 5 can suppress the ultraviolet rays emitted from the discharge lamp 4 from being incident on the inner wall of the housing 2, the substrate 3, and the lighting circuit 6. Therefore, deterioration of these portions due to ultraviolet irradiation can be suppressed.

Further, the globe 5 may have a function of a reflector. For example, the globe 5 may be made of a resin such as white, or a reflective film may be formed on the inner wall of the globe 5, or the inner wall of the globe 5 may be curved. If the globe 5 is provided with a reflector function, the utilization efficiency of the ultraviolet rays emitted from the discharge lamp 4 can be improved.

The lighting circuit 6 is provided on a surface of the substrate 3 on which the discharge lamp 4 is provided, for example. If the discharge lamp 4 and the lighting circuit 6 are provided on the same side surface of the substrate 3, the thickness dimension T of the housing 2 can be easily reduced. The lighting circuit 6 is electrically connected to the pair of terminal holders 41 via a wiring member such as a wiring cable or a metal plate. Therefore, by mounting the discharge lamp 4 on the pair of terminal holders 41, the lighting circuit 6 can be electrically connected to the discharge lamp 4.

The lighting circuit 6 applies a drive voltage of a predetermined frequency to the discharge lamp 4. When a driving voltage is applied to the discharge lamp 4, for example, discharge occurs between a pair of electrodes provided in the discharge lamp 4, and ultraviolet rays are emitted from the discharge lamp 4.

The lighting circuit 6 is composed of circuit components such as a switching element, a step-up transformer, and a capacitor. For example, the switching element converts a direct-current voltage from a battery of the vehicle into an alternating-current voltage (e.g., a sinusoidal voltage) of a predetermined frequency. Conversion to a sinusoidal voltage can reduce the amount of electromagnetic wave noise generated. The frequency of the sine wave voltage is preferably, for example, about 100kHz to 300 kHz. For example, the step-up transformer steps up the voltage from the battery of the vehicle to a predetermined voltage for lighting the discharge lamp 4.

The lighting circuit 6 may be any circuit capable of generating a drive voltage of a predetermined frequency. The lighting circuit 6 may be, for example, a resonant inverter.

The lighting circuit 6 is electrically connected to, for example, the wiring 61. For example, as shown in fig. 1 and 3, one end portion side of the wiring 61 is drawn out to the outside of the housing 2. The wiring 61 may use a so-called three-core cable. For example, the electric wire 61a of the wiring 61 electrically connects the positive side of the lighting circuit 6 and the positive side of the battery of the vehicle. For example, the wire 61b of the wiring 61 electrically connects the negative electrode side of the lighting circuit 6 and the negative electrode side of the battery of the vehicle. The electric wire 61b may be a common line (common line). The electric wire 61c of the wiring 61 electrically connects the shield 8 and a ground wire (for example, a vehicle body frame) of the vehicle. Further, the shield 8 may be in direct contact with the ground wire of the vehicle. At this time, the electric wire 61c may be omitted.

The window 7 faces the hole 22a of the frame 2 (second part 22). For example, the window 7 is provided on the inner wall of the second portion 22 and covers the hole 22a. The window 7 has a plurality of openings through which ultraviolet rays irradiated from the discharge lamp 4 can pass. The window 7 can be provided to allow ultraviolet rays emitted from the discharge lamp 4 to be emitted to the outside of the housing 2, and to prevent human fingers, foreign objects, and the like from entering the inside of the housing 2.

In fig. 4, (a) to (d) are schematic plan views illustrating the form of the window.

As shown in fig. 4 (a), the window 7a may be formed by arranging a plurality of linear members in a lattice shape.

As shown in fig. 4 (b), the window 7b may be formed by arranging a plurality of linear members in a net shape.

The windows 7a and 7b may be formed by etching, for example, or may be formed by weaving a plurality of wires. When the windows 7a and 7b are formed by etching, a frame portion surrounding the plurality of linear members may be provided.

As shown in fig. 4 (c), the window 7c may be formed by arranging a plurality of linear members in one direction. The window 7c may be formed by etching, for example. In addition, when the window 7c is formed by etching, a frame portion surrounding the plurality of linear members may be provided.

As shown in fig. 4 (d), the window 7d may be formed of a plate material having a plurality of openings (holes). The window 7d may be formed by, for example, etching or punching.

Here, when the discharge lamp 4 is turned on and a discharge is generated between the electrodes of the discharge lamp 4, an electromagnetic wave is emitted together with the ultraviolet rays. When the discharge lamp 4 is lit, electromagnetic waves may be emitted from the switching elements provided in the lighting circuit 6, wires electrically connected to the switching elements, and the like.

The vehicle is provided with electronic equipment for running the vehicle, in addition to the vehicle ultraviolet irradiation device 1. In this case, since the vehicle ultraviolet irradiation device 1 and the electronic apparatus are installed in a narrow space such as a vehicle interior, the distance between the vehicle ultraviolet irradiation device 1 and the electronic apparatus is likely to be small. Therefore, when electromagnetic waves generated in the discharge lamp 4, the lighting circuit 6, or the like provided inside the housing 2 are radiated to the outside of the housing 2, the electromagnetic waves may enter electronic equipment provided in the vicinity of the vehicle ultraviolet irradiation device 1. If electromagnetic waves are incident on the electronic device, they may become electromagnetic noise, which may cause malfunction of the electronic device.

Therefore, the vehicle ultraviolet irradiation device 1 according to the present embodiment is provided with the cover 8.

The shield 8 suppresses the electromagnetic waves generated inside the housing 2 from being radiated outside the housing 2. The shielding effect is related to reflection loss, absorption loss, and multiple reflection loss in the shield 8, but the shielding effect when shielding electromagnetic waves is mainly related to reflection loss.

That is, if the reflection loss of the shield 8 is made large, the electromagnetic waves generated inside the housing 2 can be effectively suppressed from being radiated to the outside of the housing 2. In this case, the reflection coefficient of the shield 8 may be increased to increase the reflection loss. In order to increase the reflectance of the cover 8, the impedance of the cover 8 may be decreased.

For example, the shield 8 may be provided to have conductivity. In this case, if the shield 8 is made of a material having high electrical conductivity such as metal, the reflection loss in the shield 8 can be increased, and the emission of electromagnetic waves to the outside of the housing 2 can be effectively suppressed.

The shield 8 may be, for example, a plate or a film containing a conductive material, a conductive paint containing a conductive filler, a plating layer or a vapor deposition layer having conductivity, or the like. The plate or film made of a conductive material may be bonded to the frame 2 with an adhesive, a double-sided tape, or the like. The plate material including the conductive material may be integrally molded with the frame body 2 by insert molding or the like, for example. The conductive coating material may be applied to the frame 2, for example. The plating layer having conductivity may be provided on the surface of the frame 2 by electroless plating or the like, for example. The vapor deposition layer having conductivity can be provided on the surface of the frame body 2 by, for example, sputtering.

As the conductive material, for example, metals such as aluminum, copper, nickel, and carbon steel can be used. In this case, a metal having high electric conductivity such as aluminum or copper is preferably used.

The shield 8 may be provided on at least one of an outer wall of the housing 2 and an inner wall of the housing 2, for example. In this case, when the shield 8 is provided on the outer wall of the housing 2 and the inner wall of the housing 2, the shielding effect can be improved.

However, the discharge lamp 4, the terminal holder 41, the lighting circuit 6, and the like are provided inside the housing 2. Therefore, if the shield 8 having conductivity is provided on the inner wall of the housing 2, it is necessary to ensure insulation between the shield 8 and the discharge lamp 4 and the like. For example, an insulation distance between the shield 8 provided on the inner wall of the housing 2 and the discharge lamp 4 or the like can be secured, or an insulation member such as an insulation sheet can be inserted between the shield 8 provided on the inner wall of the housing 2 and the discharge lamp 4 or the like.

However, this increases the thickness dimension T of the housing 2, or increases the weight of the vehicle ultraviolet irradiation device 1. As described above, the vehicle ultraviolet irradiation device 1 is often installed in a narrow space such as a vehicle interior together with electronic equipment for vehicle operation and the like. Therefore, if the thickness dimension T of the housing 2 becomes large or the weight of the vehicle ultraviolet irradiation device 1 becomes heavy, the installation of the vehicle ultraviolet irradiation device 1 may become difficult.

Therefore, as shown in fig. 2 and 3, the shield 8 is preferably provided on the outer wall of the housing 2. In this way, the distance between the inner wall of the insulating housing 2 and the discharge lamp 4, the terminal holder 41, the lighting circuit 6, and the like can be reduced, and therefore the thickness dimension T of the housing 2 can be easily reduced. The shield 8 provided on the outer wall of the housing 2 is electrically connected to a ground line of the vehicle via, for example, an electric wire 61c of the wiring 61.

When the housing 2 is divided, shields are provided at portions of the plurality of housings 2. For example, as shown in fig. 1 to 3, when the housing 2 includes the first portion 21 and the second portion 22, a shield 8a (corresponding to an example of a first shield) is provided on an outer wall of the first portion 21, and a shield 8b (corresponding to an example of a second shield) is provided on an outer wall of the second portion 22.

In this case, if any of the shields provided on the portions of the plurality of housings 2 is not electrically connected to the ground line of the vehicle, the shield effect of the shield is reduced. However, when the wires 61c of the wiring 61 are electrically connected to all of the plurality of shields, the wiring operation may become complicated, and the housing 2 may become difficult to detach.

Therefore, when the frame body 2 is divided, the shields provided on the divided portions of the frame body 2 are electrically connected to each other at the connecting portions between the divided portions of the frame body 2.

Fig. 5 is a schematic enlarged view of a portion C in fig. 2.

As shown in fig. 5, when the frame body 2 has the first portion 21 and the second portion 22, the hood 8a provided on the outer wall of the first portion 21 and the hood 8b provided on the outer wall of the second portion 22 contact each other at the connecting portion 2a between the first portion 21 and the second portion 22. For example, the cover 8a may be provided also at the end of the first portion 21 on the opening side, and the cover 8b may be provided also at the end of the second portion 22 on the opening side.

In this way, the shield 8a and the shield 8b can be electrically connected. Therefore, both the shield 8a and the shield 8b can be electrically connected to the ground line of the vehicle, and thus the reduction of the shielding effect can be suppressed. Further, since it is only necessary to electrically connect the wire 61c of the wiring 61 to any one of the shield 8a and the shield 8b, it is possible to suppress the wiring work from becoming complicated or the housing 2 from becoming difficult to detach.

The substrate 3, the pair of terminal holders 41, the lighting circuit 6, and the like are provided on the first portion 21. Therefore, it is preferable that the electric wire 61c of the wiring 61 is electrically connected to the cover 8a provided in the first portion 21. In this way, the second portion 22 can be easily attached and detached.

Here, as described above, the window 7 is provided with a plurality of openings through which ultraviolet rays irradiated from the discharge lamp 4 pass. Therefore, there is a possibility that electromagnetic waves are radiated to the outside of the housing 2 through the plurality of openings provided in the window 7. At this time, if the shield 8 is provided on the outer surface of the window 7, the ultraviolet rays cannot be radiated to the outside of the housing 2.

Therefore, the window 7 is provided to have conductivity. For example, the window 7 is made of a conductive material. The conductive material is the same as that used for the cover 8, for example. In this case, if the conductive material is a metal, the resistance to ultraviolet rays irradiated from the discharge lamp 4 can be improved.

When the window 7 has conductivity, reflection loss in the window 7 can be increased similarly to the above-described shield 8, and thus radiation of electromagnetic waves to the outside of the frame 2 via the window 7 can be suppressed.

Here, if the aperture ratio of the plurality of openings provided in the window 7 is reduced, the effect of shielding electromagnetic waves increases, but ultraviolet rays are less likely to transmit through the window 7. When the aperture ratio of the plurality of openings provided in the window 7 is increased, the ultraviolet rays are easily transmitted through the window 7, but the effect of shielding electromagnetic waves is lowered.

In this case, the aperture ratio of the plurality of apertures provided in the window 7 may be appropriately selected within a range of 10% to 90%. For example, the aperture ratio of the plurality of apertures may be changed according to the distance or the like between the ultraviolet irradiation device 1 for a vehicle and an electronic apparatus for vehicle running or the like. For example, if the distance between the vehicle ultraviolet irradiation device 1 and the electronic apparatus is long, the aperture ratio of the plurality of apertures can be increased to increase the irradiation amount of the ultraviolet rays. For example, if the distance between the vehicle ultraviolet irradiation device 1 and the electronic equipment is short or the noise resistance of the electronic equipment is low, the aperture ratio of the plurality of apertures may be reduced.

In addition, the aperture ratio of the plurality of apertures provided in the window 7 = (total area of the plurality of apertures/area of the window 7) × 100.

Further, similarly to the shield 8 described above, if the window 7 is not electrically connected to the ground line of the vehicle, the shielding effect of the window 7 is reduced. At this time, if the electric wire 61c of the wiring 61 is electrically connected to the shield 8 and the window 7, the wiring operation may become complicated or the removal of the housing 2 may become difficult. Therefore, the window 7 is electrically connected to the shield 8 provided in the housing 2.

Fig. 6 is a schematic enlarged view of a portion D in fig. 2.

As shown in fig. 6, a shield 8 (shield 8 b) may be provided on the inner wall of the housing 2 (second portion 22) around the hole 22a for emitting ultraviolet rays.

In this way, the cover 8 (covers 8b and 8 a) can be electrically connected to the window 7. Therefore, the window 7 can be electrically connected to the ground line of the vehicle via the shield 8 ( shields 8b and 8 a). As a result, the shielding effect of the window 7 can be suppressed from being lowered.

Further, the window 7 and the hood 8 (hood 8 b) may be connected by a fastening member such as a screw, a conductive tape, or the like. In this way, the connection between the window 7 and the hood 8 (hood 8 b) becomes stronger, and thus the connection between the window 7 and the hood 8 (hood 8 b) can be suppressed from dropping due to vibration during traveling or the like.

As described above, in the vehicle ultraviolet irradiation device 1 according to the present embodiment, the shield 8 having conductivity is provided on at least one of the outer wall of the housing 2 and the inner wall of the housing 2, and therefore, the emission of electromagnetic waves from the vehicle ultraviolet irradiation device 1 can be suppressed.

Fig. 7 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device 1a according to another embodiment.

Fig. 8 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device 1a of fig. 7 taken along line E-E.

Fig. 9 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device 1a of fig. 7 taken along line F-F.

Fig. 10 is a schematic enlarged view of a portion G in fig. 8.

Here, in the case of the vehicle ultraviolet irradiation device, the vehicle ultraviolet irradiation device may be installed in a high-temperature and high-humidity environment. For example, it is necessary to make the vehicle ultraviolet irradiation device installed in an automobile usable even in a high-temperature and high-humidity environment in which the ambient temperature is 85 ℃ and the humidity is 85%. However, since the window 7 is provided with a plurality of openings for transmitting ultraviolet rays, there is a possibility that water vapor or gas may enter the inside of the housing 2 through the plurality of openings. When water vapor or gas enters the inside of the housing 2, migration (migration), corrosion, contamination, and the like may occur in the substrate 3, the discharge lamp 4, the lighting circuit 6, and the like.

Therefore, as shown in fig. 7 to 10, the vehicle ultraviolet irradiation device 1a is provided with a partition 9 that divides the internal space of the housing 2 from the outside of the housing 2. For example, the vehicle ultraviolet irradiation device 1a may be configured by adding the partition 9 to the vehicle ultraviolet irradiation device 1.

As shown in fig. 7 to 10, the partition portion 9 has a plate shape, and faces the hole 22a. The partition 9 may be provided on the frame 2 or the globe 5, for example. The partition 9 can be attached to the frame 2 or the globe 5 with a fastening member such as a screw, an adhesive, a double-sided tape, or the like.

The partition 9 is made of a material that transmits ultraviolet rays irradiated from the discharge lamp 4. For example, the partition 9 may be made of a glass material such as fused silica glass, synthetic silica glass, or borosilicate glass, or a resin that transmits ultraviolet rays. As the resin that transmits ultraviolet rays, for example, a transparent plastic such as a silicone resin or a cycloolefin polymer can be used.

The thickness of the partition 9 is not particularly limited. The thickness of the partition 9 may be determined as appropriate in consideration of, for example, rigidity, ultraviolet transmittance, and the like. The planar size of the partition 9 may be set larger than the planar size of the hole 22a of the housing 2, for example.

The partition 9 may be provided on the discharge lamp 4 side of the window 7, or may be provided on the opposite side of the window 7 from the discharge lamp 4 side. The discharge lamp 4 is made of a glass material. Also, the partition 9 may be made of a glass material. If the discharge lamp 4 and the partition 9 are made of glass materials, the discharge lamp 4 and the partition 9 may be damaged by impact. When the discharge lamp 4 and the partition 9 are broken, if the partition 9 is provided on the side of the window 7 opposite to the discharge lamp 4 side, the broken pieces are scattered toward the periphery of the vehicle ultraviolet irradiation device 1.

As shown in fig. 7 to 10, when the partition 9 is provided on the discharge lamp 4 side of the window 7, the window 7 can suppress scattering of debris toward the periphery of the vehicle ultraviolet irradiation device 1.

As shown in fig. 8 to 10, a gap 9a is preferably provided between the partition 9 and the window 7. When the partition 9 contacts the window 7, thermal stress may be generated between the partition 9 and the window 7 in accordance with turning on and off of the discharge lamp 4. If thermal stress is generated between the partition 9 and the window 7, the partition 9 and the window 7 may be deformed, or may be damaged or worn. If the gap 9a is provided between the partition 9 and the window 7, the occurrence of thermal stress can be suppressed, and thus the occurrence of deformation and the like of the partition 9 and the window 7 can be suppressed.

As shown in fig. 8 to 10, the partition 9 may be attached via an elastic member 91. The elastic member 91 is, for example, frame-shaped and is located near the periphery of the window 7. The elastic member 91 can reduce vibration and impact during traveling and improve sealing performance. The elastic member 91 may be made of, for example, fluororubber or the like. The use of the elastic member 91 containing the fluororubber can improve the resistance to ultraviolet rays irradiated from the discharge lamp 4.

Further, although the above illustrates the case where the partition 9 is provided separately from the window 7, the partition 9 may be provided integrally with the window 7. For example, a resin that transmits ultraviolet rays may be filled in a plurality of openings provided in the window 7. For example, the window 7 may be provided inside the partition 9 by insert molding or the like. At this time, a part of the window 7 may be exposed from the partition 9 and electrically connected to the shield 8.

As described above, since the vehicle ultraviolet irradiation device 1a is provided with the window 7 and the shield 8, the electromagnetic wave can be suppressed from being emitted to the outside of the housing 2. Further, since the vehicle ultraviolet irradiation device 1a is provided with the partition portion 9, it is possible to suppress the intrusion of water vapor or gas into the inside of the housing 2. That is, according to the vehicle ultraviolet irradiation device 1a of the present embodiment, it is possible to suppress the emission of electromagnetic waves and improve the environmental resistance.

Although the embodiments of the present invention have been described above by way of example, these embodiments are merely illustrative and are not intended to limit the scope of the present invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the present invention. These embodiments and modifications thereof are within the scope and spirit of the present invention, and are also included in the invention described in the claims and equivalents thereof. The above embodiments may be combined with each other.

Claims (11)

1. An ultraviolet irradiation device for a vehicle, comprising:

a discharge lamp capable of emitting ultraviolet rays;

a lighting circuit capable of applying a drive voltage of a predetermined frequency to the discharge lamp;

a housing having an internal space for accommodating the discharge lamp and the lighting circuit, and having a hole facing the discharge lamp; and

and a shield which is provided on at least one of the outer wall of the housing and the inner wall of the housing and has conductivity.

2. The ultraviolet irradiation apparatus for vehicle as set forth in claim 1,

the frame body has a first portion and a second portion detachably provided on the first portion,

an aperture facing the discharge lamp is provided on the second portion,

a first shield having conductivity is provided on an outer wall of the first portion,

a second shield having conductivity is provided on an outer wall of the second portion,

the first shield and the second shield are electrically connected at a connection portion between the first portion and the second portion.

3. The ultraviolet irradiation apparatus for a vehicle according to claim 1 or 2,

the display device further includes a window that is conductive, covers the hole, and has a plurality of openings through which the ultraviolet rays emitted from the discharge lamp can pass.

4. The ultraviolet irradiation apparatus for vehicle as set forth in claim 3,

the window is electrically connected with the second shield.

5. The ultraviolet irradiation apparatus for vehicle as set forth in claim 3,

the aperture ratio of the window is 10% or more and 90% or less.

6. The ultraviolet irradiation apparatus for vehicle as set forth in claim 3,

the display device further includes a partition portion facing the window, dividing the internal space of the housing and the outside of the housing, and allowing the ultraviolet rays emitted from the discharge lamp to pass therethrough.

7. The ultraviolet irradiation apparatus for vehicle as set forth in claim 6,

the partition is disposed between the window and the discharge lamp.

8. The ultraviolet irradiation apparatus for a vehicle according to claim 6 or 7, characterized in that a gap is provided between the partition and the window.

9. The ultraviolet irradiation apparatus for a vehicle according to claim 6 or 7,

the window further includes an elastic member having a frame shape and located near a peripheral edge of the window.

10. The ultraviolet irradiation apparatus for vehicle as set forth in claim 9,

the elastic member includes a fluorine rubber.

11. The ultraviolet irradiation apparatus for vehicle as set forth in claim 6,

the partition is provided integrally with the window.

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