JP2020117073A - Light transmission device - Google Patents

Abstract

To improve capability of cleaning a transmission surface with fluid.SOLUTION: A light transmission mechanism 14 pumps cleaning fluid into a nozzle hole 26A through a connection pipe 28 and jets the fluid into an inflow surface 24, where the inflow surface 24 causes the cleaning fluid to flow into a transmission surface 18A from a lateral side to clean the transmission surface 18A with the cleaning fluid, thereby suppressing change in a movement direction of the cleaning fluid and suppressing kinetic-energy loss of the cleaning fluid; thus, capability of cleaning the transmission surface 18A with the cleaning fluid can be improved.SELECTED DRAWING: Figure 2

Description

The present invention relates to a light transmission device that allows light to pass through a transmission surface.

In the vehicle-mounted optical sensor cleaning device described in Patent Document 1 below, air is jetted from the nozzle toward the lens surface of the vehicle-mounted camera, and the lens surface is cleaned by the air.

Here, in such a vehicle-mounted optical sensor cleaning device, it is preferable that the ability of cleaning the lens surface with air can be improved.

JP, 2008-34647, A

SUMMARY OF THE INVENTION In consideration of the above facts, an object of the present invention is to obtain a light transmission device capable of improving the ability of cleaning a transmission surface with a fluid.

The light transmission device according to the first aspect of the present invention includes a transmission surface that allows light to pass therethrough, an optical mechanism that performs at least one of emission and incidence of light through the transmission surface, and a side surface of the transmission surface. An inflow surface into which a fluid is introduced and the permeation surface is washed by the fluid.

A light transmitting device according to a second aspect of the present invention is the light transmitting device according to the first aspect of the present invention, wherein a fluid is supplied to the inflow surface along the inflow surface.

A light transmission device according to a third aspect of the present invention is the light transmission device according to the first or second aspect of the present invention, wherein the inflow surface is concavely curved in a direction toward the transmission surface.

A light transmitting device according to a fourth aspect of the present invention is the light transmitting device according to any one of the first to third aspects of the present invention, in which the fluid expands outward in the movement width direction toward the transmitting surface at the inflow surface. To be done.

A light transmission device according to a fifth aspect of the present invention is the light transmission device according to any one of the first to fourth aspects of the present invention, wherein the transmission surface is formed in a convex shape and is arranged in a circumferential direction of the transmission surface. The fluid is moved.

A light transmitting device according to a sixth aspect of the present invention is the light transmitting device according to any one of the first to fifth aspects of the present invention, which is integrated with the inflow surface and supplies a fluid to the inflow surface. Equipped with.

In the light transmission device of the first aspect of the present invention, the transmission surface is made to be able to transmit light, and the optical mechanism performs at least one of emission and incidence of light through the transmission surface.

Here, the inflow surface causes the fluid to flow into the permeation surface from the side, and the permeation surface is cleaned by the fluid. For this reason, it is possible to suppress the movement direction of the fluid from being changed when the fluid flows from the inflow surface to the permeation surface, suppress loss of kinetic energy of the fluid, and improve the ability of the fluid to clean the permeation surface. ..

In the light transmission device of the second aspect of the present invention, the fluid is supplied to the inflow surface along the inflow surface. Therefore, the loss of kinetic energy of the fluid when the fluid is supplied to the inflow surface can be suppressed, and the ability of the fluid to clean the permeation surface can be further improved.

In the light transmissive device of the third aspect of the present invention, the inflow surface is concavely curved in the direction toward the transmissive surface. Therefore, it is possible to effectively suppress a change in the moving direction of the fluid when the fluid flows from the inflow surface to the transmission surface.

In the light transmitting device according to the fourth aspect of the present invention, the fluid is expanded outward in the movement width direction toward the transmitting surface at the inflow surface. Therefore, the cleaning range of the inflow surface with the fluid can be increased.

In the light transmissive device of the fifth aspect of the present invention, the transmissive surface is convex, and the fluid is moved in the circumferential direction of the transmissive surface. Therefore, even when the permeable surface is made convex, the fluid can reach the portion of the permeable surface opposite to the inflow surface.

In the light transmission device according to the sixth aspect of the present invention, the supply unit supplies the fluid to the inflow surface.

Here, the supply part is integrated with the inflow surface. Therefore, the number of parts can be reduced.

(A) And (B) is a figure which shows the light transmission mechanism of the mirror apparatus for vehicles which concerns on 1st Embodiment of this invention, (A) is a perspective view, (B) is a front view. is there. (A) And (B) is a figure which shows the light transmission mechanism of the vehicle mirror apparatus which concerns on 1st Embodiment of this invention, (A) is 2A-2A sectional view taken on the line of FIG. 1(A). Yes, (B) is a cross-sectional view taken along line 2B-2B of FIG. (A) And (B) is a figure which shows the light transmission mechanism of the vehicle mirror apparatus which concerns on 2nd Embodiment of this invention, (A) is a perspective view, (B) is a front view. is there. It is sectional drawing (4-4 sectional view of FIG. 3(A)) which shows the light transmission mechanism of the vehicle mirror apparatus which concerns on 2nd Embodiment of this invention. It is a front view showing a light transmission mechanism of a mirror device for vehicles concerning a 3rd embodiment of the present invention.

[First Embodiment]
FIG. 1(A) is a perspective view showing a main part of a vehicle mirror device 10 as a light transmission device according to a first embodiment of the present invention, and FIG. 1(B) shows a vehicle mirror device. The main part of the mirror device 10 is shown in a front view. Further, FIG. 2A shows a main part of the vehicle mirror device 10 in a sectional view (a sectional view taken along line 2A-2A in FIG. 1A). In the drawings, the front of the vehicle is indicated by arrow FR, the right side of the vehicle is indicated by arrow RH, and the upper side is indicated by arrow UP.

The vehicle mirror device 10 according to the present embodiment is installed at a vehicle front side end of an intermediate portion in a vertical direction of a side door (especially, a front side door) of a vehicle, and is arranged outside a vehicle body.

A resin visor 12 (see FIG. 1A) as an outer peripheral body is provided on the outer periphery of the vehicle mirror device 10, and the visor 12 has a substantially rectangular box shape. A substantially rectangular parallelepiped arrangement chamber (not shown) is formed at the vehicle rear portion of the visor 12, and the arrangement chamber is open to the vehicle rear side. A substantially rectangular plate-shaped mirror (not shown) is arranged in the arrangement chamber, and the front side of the mirror is directed to the vehicle rear side, whereby the mirror assists the occupant of the vehicle to visually recognize the vehicle rear side.

As shown in FIGS. 1A and 1B and FIG. 2A, the visor 12 is provided with a light transmission mechanism 14 outside the outer periphery of the placement chamber.

The light transmission mechanism 14 is provided with a camera 16 as an optical mechanism, and the camera 16 is housed in the visor 12. The camera 16 is provided with a substantially rectangular parallelepiped box-shaped case 16A, and a lens 16B is provided at the front end (vehicle rear end) of the case 16A. The front surface of the lens 16B is curved in a spherical convex shape and is directed toward the vehicle rear side, and the camera 16 images light incident on the lens 16B from the front side (vehicle rear side). In addition, a target light passage region L of the camera 16 (an image pickup region of the camera 16) is formed into a substantially conical shape coaxial with the lens 16B, and is a region that is enlarged as it is separated from the lens 16B toward the front side. (See FIG. 2A).

A circular flat plate-shaped transparent wall 18 as a transparent portion is formed on the visor 12 on the vehicle rear side of the camera 16, and the transparent wall 18 allows light to pass therethrough and also has a front surface (vehicle rear surface). ) Is a circular flat transmission surface 18A (target surface). The transmission wall 18 is arranged coaxially with the lens 16B of the camera 16, and the passage area L of the target light of the camera 16 is arranged inside the outer circumference. The light incident on the lens 16B through the transmission wall 18 is imaged to detect the situation on the rear side of the vehicle.

The visor 12 is provided with a guide wall 20 having a substantially truncated cone side wall shape as a guide portion on the outer side in the radial direction of the transmission wall 18, and the guide wall 20 is arranged coaxially with the transmission wall 18, and The diameter is increased toward the rear of the vehicle. The entire inner periphery of the guide wall 20 is integrated with the entire outer periphery of the transmission wall 18, and the entire inner periphery of the inner wall surface of the guide wall 20 is integrated with the entire outer periphery of the transmission surface 18A of the transmission wall 18. .. A passage region L of the target light of the camera 16 is arranged inside the inner wall surface of the guide wall 20, and this restricts the guide wall 20 from obstructing the imaging of the camera 16.

An inflow wall 22 (see FIG. 2B) as an inflow portion is formed in the upper portion of the guide wall 20. The surface of the inflow wall 22 on the inner wall side of the guide wall 20 is a concave inflow surface 24, and the inflow surface 24 is arranged between the inner periphery of the inner wall surface of the guide wall 20 and the radial middle portion. .. The size of the inflow surface 24 in the circumferential direction of the guide wall 20 is increased toward the inner side of the guide wall 20 in the radial direction, and both ends of the inflow surface 24 in the circumferential direction of the guide wall 20 are the same as those of the transmissive surface 18A of the transmissive wall 18. It is integrated with the vicinity of both ends in the vehicle left-right direction. A substantially trapezoidal bottom surface 24A is provided on the vehicle front side of the inflow surface 24, and the bottom surface 24A is integrated with the outer periphery of the transmission surface 18A. The bottom surface 24A is curved in a parabolic concave shape in the radial direction of the guide wall 20, and the inclination angle of the end portion of the bottom surface 24A on the transparent surface 18A side (inward in the radial direction of the guide wall 20) with respect to the transparent surface 18A is reduced. (For example, it is set to 30° or less, and may be set to 0°). Substantially triangular side faces 24B are provided at both ends of the inflow face 24 in the circumferential direction of the guide wall 20, and the side faces 24B are arranged parallel to the axial direction of the guide wall 20 (vehicle front-rear direction) and have a width. The size is increased toward the radially outer side of the guide wall 20.

A nozzle 26 (see FIG. 2B) as a supply unit is formed in the guide wall 20 above the inflow wall 22, and a nozzle hole 26A having a rectangular cross section is formed in the nozzle 26. There is. The nozzle hole 26A extends in the generatrix direction of the guide wall 20 in the nozzle 26, and the nozzle hole 26A is opened in the inflow surface 24. The dimension of the nozzle hole 26A in the axial direction of the guide wall 20 (vehicle front-rear direction) is reduced toward the inner side of the guide wall 20 in the radial direction, and the size of the nozzle hole 26A on the inflow surface 24 side (the inner side of the guide wall 20 in the radial direction) is reduced. The end portion is arranged parallel to the end portion of the bottom surface 24A of the inflow surface 24 on the nozzle hole 26A side (outside in the radial direction of the guide wall 20). The size of the nozzle hole 26A in the circumferential direction of the guide wall 20 is made smaller toward the inner side of the guide wall 20 in the radial direction, and both side surfaces of the nozzle hole 26A are connected to both side surfaces 24B of the inflow surface 24, respectively.

A substantially cylindrical connecting pipe 28 (see FIG. 2B) as a connecting portion is integrally formed on the visor 12 above the guide wall 20, and the inside of the connecting pipe 28 communicates with the nozzle hole 26A. In addition, it is projected inside the visor 12 (front side of the vehicle). The connection pipe 28 is connected to a pump (not shown) of the vehicle, and when the pump is operated, the cleaning liquid as a fluid is pressure-fed to the nozzle hole 26A through the inside of the connection pipe 28 and the nozzle hole 26A. Is ejected (supplied) into the inflow surface 24 from.

The lower part of the inner wall surface of the guide wall 20 is an outflow surface 30 having a truncated cone side surface shape, and the outflow surface 30 is arranged between the inner circumference and the outer circumference of the inner wall surface of the guide wall 20, and The dimension in the circumferential direction of the guide wall 20 is increased toward the radially outer side of the guide wall 20.

Next, the operation of this embodiment will be described.

In the light transmission mechanism 14 of the vehicle mirror device 10 having the above-described configuration, the camera 16 images the light incident on the lens 16B from the front side of the transmission wall 18 of the visor 12 via the transmission wall 18.

By the way, when the pump is operated, in the guide wall 20 of the visor 12, the cleaning liquid is pressure-fed to the nozzle hole 26A of the nozzle 26 through the inside of the connecting pipe 28, and the inflow surface 24 of the inflow wall 22 is discharged from the nozzle hole 26A. Erupted inside.

Here, the inflow surface 24 guides the cleaning liquid, so that the inflow surface 24 causes the cleaning liquid to flow into the permeation surface 18A of the permeation wall 18 from the side (outer in the radial direction, the upper side), and the permeation surface 18A is cleaned by the cleaning liquid. It Therefore, it is possible to suppress the change of the moving direction of the cleaning liquid when the cleaning liquid flows from the inflow surface 24 to the permeation surface 18A, it is possible to suppress the loss of the kinetic energy of the cleaning liquid, and the cleaning ability of the cleaning liquid for the permeation surface 18A. Can be improved. Moreover, the pressure applied to the permeable surface 18A from the cleaning liquid can be lowered, and it is possible to eliminate the need to increase the strength of the permeable surface 18A (for example, the coating layer of the permeable wall 18 forming the permeable surface 18A).

Further, the bottom surface 24A of the inflow surface 24 is curved in a parabolic concave shape in the radial direction of the guide wall 20, and the inclination angle of the end portion of the bottom surface 24A on the transmission surface 18A side with respect to the transmission surface 18A is reduced. Therefore, the cleaning liquid can smoothly move on the inflow surface 24, and the movement direction of the cleaning liquid can be effectively prevented from changing when the cleaning liquid flows from the inflow surface 24 to the permeation surface 18A, and the kinetic energy of the cleaning liquid can be suppressed. Can be effectively suppressed, and the cleaning ability of the permeable surface 18A with the cleaning liquid can be effectively improved. Moreover, the pressure applied from the cleaning liquid to the transmission surface 18A can be effectively reduced, and the need to increase the strength of the transmission surface 18A can be effectively eliminated.

Further, the end of the nozzle hole 26A on the inflow surface 24 side is arranged in parallel to the end of the bottom surface 24A of the inflow surface 24 on the nozzle hole 26A side, and the cleaning liquid flows from the nozzle hole 26A to the nozzle hole 26A side of the bottom surface 24A. Gush along the edges. Therefore, it is possible to suppress the loss of the kinetic energy of the cleaning liquid when the cleaning liquid is ejected from the nozzle hole 26A into the inflow surface 24, and it is possible to further improve the cleaning performance of the permeation surface 18A by the cleaning liquid.

Further, the dimension of the inflow surface 24 in the circumferential direction of the guide wall 20 is increased toward the inner side in the radial direction of the guide wall 20, and in the inflow surface 24 the cleaning liquid is directed toward the permeation surface 18A in the circumferential direction of the guide wall 20 (moving width direction). ) Expanded to the outside. Therefore, the cleaning range of the inflow surface 24 with the cleaning liquid can be increased in the vehicle left-right direction.

Moreover, the dimension of the nozzle hole 26A in the circumferential direction of the guide wall 20 is made smaller toward the radially inner side of the guide wall 20. Therefore, in the inflow surface 24, the cleaning liquid can be effectively expanded outward in the circumferential direction of the guide wall 20 toward the permeation surface 18A, and the cleaning range of the inflow surface 24 by the cleaning liquid can be effectively increased in the vehicle left-right direction.

Further, a nozzle 26 is arranged outside the target light passage region L of the camera 16, and the inflow surface 24 guides the cleaning liquid from the nozzle hole 26A to the transmission surface 18A. Therefore, it is possible to prevent the nozzle 26 from blocking the image pickup by the camera 16. Moreover, it is possible to eliminate the need to move the nozzle 26 from the outer side to the inner side of the target light passage region L of the camera 16 to jet the cleaning liquid from the nozzle 26 to the transmission surface 18A. Thereby, the mechanism for moving the nozzle 26 can be eliminated, and the loss of the kinetic energy of the cleaning liquid until the cleaning liquid reaches the permeation surface 18A from the nozzle 26 can be suppressed to improve the cleaning ability of the cleaning liquid for the permeation surface 18A.

Further, the nozzle 26 and the connection pipe 28 are integrally formed with the visor 12, and are integrated with the transmission wall 18 and the inflow wall 22. Therefore, the number of parts can be reduced and the structure of the light transmission mechanism 14 can be simplified.

Further, the outflow surface 30 of the guide wall 20 is inclined with respect to the transmission surface 18A. Therefore, the cleaning liquid that has cleaned the transmissive surface 18A can be guided to the outflow surface 30 while suppressing the loss of kinetic energy and flow out (separate) from the transmissive surface 18A. For this reason, it is possible to prevent the deposits (the components of the cleaning liquid and the dirt on the permeation surface 18A) from the cleaning liquid from adhering to the permeation surface 18A.

[Second Embodiment]
FIG. 3(A) is a perspective view showing a main part of a vehicle mirror device 50 as a light transmission device according to a second embodiment of the present invention, and FIG. The main part of the mirror device 50 is shown in a front view. Further, FIG. 4 shows a main portion of the vehicle mirror device 50 in a sectional view (a sectional view taken along line 4-4 in FIG. 3A).

The vehicle mirror device 50 according to the present embodiment has substantially the same configuration as the first embodiment, but differs in the following points.

As shown in FIGS. 3A and 3B and FIG. 4, in the light transmission mechanism 14 of the vehicle mirror device 50 according to the present embodiment, the transmission surface 18A of the transmission wall 18 of the visor 12 has a spherical convex shape. It is curved.

Here, also in this embodiment, the same operation and effect as those of the first embodiment can be obtained.

Further, in the guide wall 20 of the visor 12, the dimension of the inflow surface 24 in the circumferential direction of the guide wall 20 is increased toward the radially inner side of the guide wall 20, and the cleaning liquid is guided toward the permeation surface 18A at the inflow surface 24. The wall 20 is enlarged outward in the circumferential direction (moving width direction). For this reason, the cleaning liquid that has moved on both ends of the inflow surface 24 in the circumferential direction of the guide wall 20 moves circumferentially on both sides of the transmission surface 18A in the vehicle left-right direction, and reaches the lower end of the transmission surface 18A. The cleaning liquid can clean the lower end of the transmission surface 18A. Therefore, even if the cleaning liquid moving on the top of the transmission surface 18A is separated from the transmission surface 18A and does not reach the lower end of the transmission surface 18A, the lower end of the transmission surface 18A can be cleaned.

Moreover, the dimension of the nozzle hole 26A in the circumferential direction of the guide wall 20 is made smaller toward the radially inner side of the guide wall 20. Therefore, in the inflow surface 24, the cleaning liquid can be effectively expanded outward in the circumferential direction of the guide wall 20 toward the permeation surface 18A, and the cleaning liquid that has moved to both ends of the inflow surface 24 in the circumferential direction of the guide wall 20 can be respectively transmitted to the permeation surface 18A. The left and right sides of the vehicle can be effectively moved in the circumferential direction, and the lower end of the transparent surface 18A can be effectively reached. Therefore, the lower end of the transparent surface 18A can be effectively cleaned.

[Third Embodiment]
FIG. 5 is a front view showing a main part of a vehicle mirror device 60 as a light transmission device according to a third embodiment of the present invention.

The vehicle mirror device 60 according to the present embodiment has substantially the same configuration as the second embodiment, but differs in the following points.

As shown in FIG. 5, in the light transmission mechanism 14 of the vehicle mirror device 60 according to the present embodiment, the nozzle hole 26A of the nozzle 26 in the guide wall 20 of the visor 12 has a substantially triangular shape in a front view from the vehicle rear side. The dimension of the nozzle hole 26A in the vehicle left-right direction (circumferential direction of the guide wall 20) is increased toward the lower side (the inner side of the guide wall 20 in the radial direction, the inflow surface 24 side) so that both side surfaces of the nozzle hole 26A are Each is flush with both side surfaces 24B of the inflow surface 24.

At the lower end of the nozzle hole 26A, a substantially rhomboidal columnar dividing column 26B is formed as a dividing portion at the center of the vehicle left-right direction. The dividing column 26B is located in the guide wall 20 axial direction of the nozzle hole 26A (vehicle front-rear direction). ), the lower end of the nozzle hole 26A is divided into parts on both sides in the vehicle left-right direction. Both side surfaces of the upper side (outside in the radial direction of the guide wall 20) of the split column 26B are inclined toward the vehicle lateral left and right sides of the split column 26B as they go downward, and both sides of the lower end of the nozzle hole 26A in the vehicle horizontal direction. The vehicle lateral dimension of the portion is made smaller toward the lower side by the upper side surface of the split pillar 26B. Both side surfaces of the lower side of the split pillar 26B are inclined toward the inner side in the vehicle left-right direction of the split pillar 26B as they go downward, and the vehicle left-right dimension of the lower left and right sides of the nozzle hole 26A is equal to the vehicle left-right dimension. The lower side surface of the split column 26B is made larger toward the lower side. The inclination angle of the lower side surfaces of the split column 26B with respect to the vertical direction is larger than the inclination angle of the upper side surfaces of the split column 26B with respect to the vertical direction.

Here, also in this embodiment, the same operation and effect as those of the second embodiment can be obtained.

In particular, in the guide wall 20 of the visor 12, the lower end portion (end portion on the inflow surface 24 side) of the nozzle hole 26A is divided into portions on both sides in the vehicle left-right direction by the dividing columns 26B. Therefore, the cleaning liquid can be effectively ejected from both sides of the lower end of the nozzle hole 26A in the vehicle left-right direction to both ends of the inflow surface 24 in the vehicle left-right direction (both ends in the circumferential direction of the guide wall 20), and the cleaning liquid can be ejected. It is possible to effectively move both sides of the transmission surface 18A in the vehicle left-right direction from both ends in the vehicle left-right direction in the circumferential direction, and to effectively reach the lower end of the transmission surface 18A. As a result, the lower end of the transparent surface 18A can be effectively cleaned.

Moreover, the vehicle left-right direction dimension of the vehicle left-right direction both sides of the lower end portion of the nozzle hole 26A is made smaller as it goes downward by the upper side surface of the split column 26B. For this reason, the cleaning liquid can be more effectively ejected from both sides of the lower end portion of the nozzle hole 26A in the vehicle left-right direction to the vehicle left-right end portions of the inflow surface 24, respectively, and the cleaning liquid permeates from the inflow surface 24 left-right direction of the vehicle, respectively. It is possible to more effectively move both side portions of the surface 18A in the vehicle left-right direction in the circumferential direction, and it is possible to more effectively reach the lower end portion of the transparent surface 18A. As a result, the lower end of the transparent surface 18A can be cleaned more effectively.

In the first to third embodiments, the inclination angle of the outflow surface 30 with respect to the transmission surface 18A is larger than the inclination angle of the end of the bottom surface 24A of the inflow surface 24 on the transmission surface 18A side with respect to the transmission surface 18A. To be done. However, the inclination angle of the outflow surface 30 with respect to the transmission surface 18A may be set to be equal to or less than the inclination angle of the end of the bottom surface 24A of the inflow surface 24 on the transmission surface 18A side with respect to the transmission surface 18A. In this case, the cleaning liquid that has cleaned the transmissive surface 18A can be effectively discharged from the transmissive surface 18A while being guided to the outflow surface 30 while effectively suppressing the loss of kinetic energy.

Moreover, in the said 1st Embodiment-3rd Embodiment, 18 A of permeation|transmission surfaces are turned to the vehicle rear side, and the inflow wall 22 and the nozzle 26 are arrange|positioned above the permeation|transmission wall 18. However, the transparent surface 18A may be directed to other than the vehicle rear side (for example, vehicle front side, vehicle left side, vehicle right side, upper side or lower side), and other than the upper side of the transparent wall 18 (for example, vehicle front side, vehicle rear side, vehicle left side). The inlet wall 22 and the nozzle 26 may be arranged on the right side or the lower side of the vehicle. Even in this case, since the loss of kinetic energy of the cleaning liquid is suppressed when the cleaning liquid flows from the inflow surface 24 into the permeation surface 18A, the cleaning performance of the permeation surface 18A by the cleaning liquid can be improved.

Furthermore, in the above-described first to third embodiments, the nozzle 26 is integrally formed with the guide wall 20. However, the nozzle 26 may be fixed to the guide wall 20 separately from the guide wall 20.

Further, in the first to third embodiments described above, the transmission surface 18A is provided on the transmission wall 18 of the visor 12. However, for example, when the lens 16B of the camera 16 is exposed to the outside, the front surface of the lens 16B may be the transmission surface 18A. In this case, the guide wall 20 may be provided on the case 16A of the camera 16.

Further, in the first to third embodiments, the optical mechanism is the camera 16. However, the light mechanism may be a sensor. In this case, the sensor detects the light incident from the front side, and the arrangement of the passage area L (the detection area of the sensor) of the target light of the sensor with respect to the transmission wall 18 and the guide wall 20 is the first to third embodiments. The same as the form. Moreover, the light mechanism may be a projector. In this case, the projector emits light to the front side, and the arrangement of the passage region L (light emission region of the projector) of the target light of the projector with respect to the transmission wall 18 and the guide wall 20 is the first to third embodiments. The same as in the embodiment.

In addition, in the first to third embodiments, the fluid is the cleaning liquid (liquid). However, the fluid may also be a gas (eg air) or a mixture of a gas (eg air) and a liquid (eg a cleaning liquid).

Furthermore, in the first to third embodiments, the light transmission device is the vehicle mirror device 10, 50. However, the light transmission device may be other than the vehicle mirror devices 10 and 50.

10... Vehicle mirror device (light transmission device), 16... Camera (optical mechanism), 18A... Transmission surface, 24... Inflow surface, 26... Nozzle (supply unit), 50. ..Vehicle mirror device (light transmission device), 60... Vehicle mirror device (light transmission device)

Claims (6)

A transparent surface that allows light to pass through,
An optical mechanism that performs at least one of emission and incidence of light through the transmission surface,
An inflow surface in which a fluid is laterally flowed into the permeable surface to wash the permeable surface with the fluid;
A light transmission device comprising. The light transmission device according to claim 1, wherein a fluid is supplied to the inflow surface along the inflow surface. The light transmission device according to claim 1, wherein the inflow surface is curved in a concave shape in a direction toward the transmission surface. The light transmission device according to claim 1, wherein the fluid is expanded outward in the movement width direction toward the transmission surface at the inflow surface. The light transmissive device according to claim 1, wherein the transmissive surface is convex and the fluid is moved in a circumferential direction of the transmissive surface. The light transmission device according to claim 1, further comprising a supply unit that is integrated with the inflow surface and that supplies a fluid to the inflow surface.