Vehicle-mounted infrared projector, vehicle periphery detection device, vehicle lamp

Abstract

A vehicle-mounted infrared projector (10) includes a projector housing (12) that is capable of being fitted to a housing (102) provided on a vehicle, and a portion of which is formed by an outer lens (20) having infrared transmissivity, the outer lens (20) being disposed at an opening portion (105) of the housing (102) when fitted to the housing (102); a first infrared light emitting element (40a) disposed inside the projector housing (12) and irradiating infrared light obliquely downward in front through a first region (20a) of the outer lens (20); and a second infrared light emitting element (40b) disposed inside the projector housing (12) and irradiating infrared light obliquely downward in back through a second region (20b) of the outer lens (20). The second region (20b) of the outer lens (20) is located further in back than the first region (20a) of the outer lens (20), and the second infrared light emitting element (40b) is disposed further in front than the first infrared light emitting element (40a).

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle-mounted infrared light projector, a vehicle periphery detection device, and a vehicle lamp. BACKGROUND

[0002] In the past, an automobile outside mirror equipped with an infrared light emitting device that emits infrared light in a point shape toward the front side of the vehicle (near the ground surface of the front wheel) and a camera that captures an infrared light irradiation region has been known. The captured image is particularly used for confirming a dead angle near the front wheel at night for the driver (for example, refer to Patent Document 1).

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENTS

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-231128 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, an infrared light projector capable of irradiating a wide range is useful in detecting a person or an obstacle in a wide range around a vehicle in various scenes related to automatic driving or driving assistance, particularly automatic parking or parking assistance at night. However, such an infrared light projector is likely to be large in size according to the width of the irradiation region, and can not be accommodated in a limited accommodation space such as a side mirror.

[0008] One embodiment of the present application is achieved in view of such a situation, and one of illustrative objects thereof is to provide a vehicle-mounted infrared light projector that is compact and irradiates a wide range.

[0009] The above-described infrared light emitting device is connected to an external power supply and a control device through a wire. In a case where there is a metal portion or a sharp portion in the frame of the light emitting device or other surrounding structures, the wire can be damaged due to contact with such a portion for external connection.

[0010] One embodiment of the present application is achieved in view of such a situation, and one of illustrative objects thereof is to protect a flexible cord that connects a light emitting device to the outside.

[0011] In a case where a housing equipped with an infrared light emitting device is exposed to the outside, water can enter from the outside, for example, on a rainy day. Depending on the arrangement of the infrared light emitting device, water that has entered the housing can flow beside the infrared light emitting device or stay around the infrared light emitting device. If the infrared light emitting device is likely to be exposed to water, the risk of water penetrating into the inside of the device can increase.

[0012] One embodiment of the present application was achieved in view of such a situation, and one of the illustrative objects thereof is to reduce the possibility of water entering an infrared projector for vehicle.

[0013] Means for solving the problem

[0014] One embodiment of the present application relates to an infrared projector for vehicle that irradiates a road surface on a side of a vehicle with infrared rays in a front-back direction. The infrared projector for vehicle includes a projector frame body that is a projector frame body capable of being fitted to a housing provided on the vehicle, and a part of which is formed by an outer lens having infrared ray permeability, the outer lens being disposed at an opening portion of the housing when fitted to the housing; a first infrared light emitting element that is disposed inside the projector frame body, and irradiates infrared rays to an obliquely lower front of the vehicle through a first region of the outer lens; and a second infrared light emitting element that is disposed inside the projector frame body, and irradiates infrared rays to an obliquely lower rear of the vehicle through a second region of the outer lens. The second region of the outer lens is located at a position further to the rear of the vehicle than the first region of the outer lens, and the second infrared light emitting element is disposed at a position further to the front of the vehicle than the first infrared light emitting element.

[0015] According to this embodiment, a compact infrared projector for vehicle that irradiates a wide range can be provided. The infrared projector for vehicle can house the first infrared light emitting element and the second infrared light emitting element in a relatively small projector frame body, and can widely irradiate a side of the vehicle in a front-back direction.

[0016] The first infrared light emitting element can be disposed in a first posture in which infrared rays are emitted into the first region of the outer lens, and the second infrared light emitting element can be disposed in a second posture different from the first posture in which infrared rays are emitted into the second region of the outer lens. In this way, the first infrared light emitting element and the second infrared light emitting element can be disposed in different appropriate postures, respectively. Compared to a case where these infrared light emitting elements are limited to the same posture, the postures of the respective infrared light emitting elements can be increased in design freedom, and it can be expected that it becomes easier to design a more compact infrared projector.

[0017] The inner surface of the second region of the outer lens can be inclined downward from a rear edge portion toward a front edge portion of the second region. In this way, when infrared rays are emitted obliquely to the rear and lower side from the second infrared light emitting element, the inner surface of the second region can be disposed so as to face the second infrared light emitting element. Thus, the inner surface of the second region can be disposed so as to be orthogonal or close to orthogonal to the optical axis of the second infrared light emitting element, and the emission angle of infrared rays from the second infrared light emitting element into the second region of the outer lens can be reduced. Reflection of infrared rays that have entered the inner surface of the second region of the outer lens can be suppressed, and the infrared projector can emit more infrared rays through the second region of the outer lens.

[0018] Also, the outer lens can be shaped so as to be configured to project outward from the opening of the housing when the light projector frame is fitted to the housing, and the second infrared light emitting element can be disposed at a position lower than the front edge of the opening of the housing. In this case, compared to a case in which the second infrared light emitting element is disposed at a position higher than the front edge of the opening of the housing, the infrared rays emitted from the second infrared light emitting element toward the obliquely rearward and lower direction are less likely to be blocked by the rear edge of the opening. The infrared light projector can irradiate the infrared rays farther toward the rear direction.

[0019] Also, the vehicle-mounted infrared light projector can further include a flexible printed board on which the first infrared light emitting element and the second infrared light emitting element are mounted. In this case, by virtue of the flexibility of the flexible printed board, the first infrared light emitting element and the second infrared light emitting element can be housed in the light projector frame in a state in which the flexible printed board is bent, in a manner in which the first infrared light emitting element and the second infrared light emitting element adopt their respective setting postures while saving space.

[0020] Also, the first infrared light emitting element and the second infrared light emitting element can be disposed so as to be offset from each other in the left-right direction. In this case, it is easy to dispose the other light emitting element in a manner in which the infrared rays emitted from the one light emitting element are not blocked.

[0021] Also, the vehicle-mounted infrared light projector can further include an inner lens member having a first inner lens and a second inner lens. Also, the first inner lens can be disposed between the first infrared light emitting element and the first region of the outer lens, and the second inner lens can be disposed between the second infrared light emitting element and the second region of the outer lens. Also, the first inner lens and the second inner lens can be disposed so as to be arranged in the left-right direction and be integrally formed. In this case, the first inner lens and the second inner lens can be used for light distribution control of the infrared rays from the first infrared light emitting element and the second infrared light emitting element, respectively. In addition, compared to a case in which two inner lenses are prepared as separate components, the first inner lens and the second inner lens can be disposed while saving space, and the installation work becomes easy.

[0022] Also, the light projector frame can include a heat dissipation member that supports the first infrared light emitting element and the second infrared light emitting element and is airtightly coupled to the outer lens to form the light projector frame. Also, the heat dissipation member can include an air hole that is in communication with the outside of the light projector frame. The air hole is effective for suppressing intrusion of moisture from the outside of the light projector frame into the inside.

[0023] The vehicle-mounted infrared light projector can further include a wiring substrate on which at least one of the first infrared light emitting element and the second infrared light emitting element is mounted, a cord for connecting the wiring substrate to the outside, and a cord holding portion. The light projector housing can further include a metal heat dissipation member that supports the wiring substrate and a gasket formed of a resin material, and the heat dissipation member and the outer lens can be coupled in a manner that the gasket is interposed therebetween, thereby accommodating the wiring substrate. The cord holding portion can be provided on the outside of the light projector housing as a part of the heat dissipation member and covered by the gasket.

[0024] According to this configuration, the cord holding portion that is a part of the metal heat dissipation member is covered by the gasket. When the cord is held by the cord holding portion, the cord does not directly contact the metal portion, and it is difficult to damage the cord. Therefore, the cord that connects the wiring substrate in the vehicle-mounted infrared light projector to the outside can be protected.

[0025] The heat dissipation member can have a heat dissipation fin and a cord passing hole, the cord holding portion can be formed on a side opposite to the heat dissipation fin with respect to the cord passing hole, and the cord can be routed from the cord passing hole to the outside of the light projector housing and to the cord holding portion. In this way, the cord that is routed from the cord passing hole to the cord holding portion that is located on the side opposite to the heat dissipation fin, and thus contact of the cord with the heat dissipation fin can be avoided. Therefore, the cord can be more effectively protected.

[0026] The cord holding portion can protrude from the heat dissipation member in a direction opposite to a direction in which the cord is drawn from the cord passing hole, and the cord can be routed in a manner that a bent portion is formed between the cord passing hole and the cord holding portion, and a bushing can be fitted on the cord in a range from the cord passing hole to the bent portion. In this way, a restoring force of the bushing that wants to restore the bent state to the original straight state acts in a manner that the cord held by the cord holding portion is pulled to the bushing side. The cord can be more reliably held by the cord holding portion. In addition, by bending the cord and the bushing, the cord can be compactly concentrated in the vicinity of the light projector housing, and the cord is less likely to interfere with other components and structures around the cord.

[0027] The vehicle-mounted infrared light projector can further include a protector formed of a resin material and fitted to an outer periphery of the outer lens. The cord can be held by the gasket and the protector to the cord holding portion. In this way, the cord can be more reliably held by the cord holding portion.

[0028] The wiring substrate can be a flexible printed substrate. In this way, the flexibility of the flexible printed substrate can be used to increase the degree of freedom of the position and the posture of the infrared light emitting element, and the flexible printed substrate can be accommodated in a space-saving manner.

[0029] The heat dissipation member can have an air hole that is open to the outside of the light projector housing. The air hole can help prevent moisture from entering the light projector housing from the outside.

[0030] The vehicle-mounted infrared light projector can further include a protective member formed of a resin material and sandwiched between the edge of the opening of the housing and the outer peripheral portion of the outer lens. The housing can have a recess formed in the outer peripheral portion of the outer lens and edged by the protective member. The protective member can have a drain path connecting the recess and an area outside the recess.

[0031] According to this configuration, since the protective member is provided with the drain path, water that can accumulate in the recess edged by the protective member can escape outside the recess through the drain path. Thus, the risk of water entering the light projector housing can be reduced.

[0032] The drain path can be a groove formed in the surface of the protective member.

[0033] The recess can be located in the lower portion of the housing.

[0034] The housing can be a housing of a side mirror of a vehicle.

[0035] A vehicle-mounted infrared light projector according to one embodiment includes a light projector housing that is a light projector housing capable of being fitted to a housing provided on a vehicle, and a portion of which is formed by an outer lens having infrared light transmittance, the outer lens being disposed at an opening of the housing when fitted to the housing; a first infrared light emitting element disposed inside the light projector housing to irradiate a first side with respect to the light projector housing through a first region of the outer lens; and a second infrared light emitting element disposed inside the light projector housing to irradiate a second side opposite to the first side with respect to the light projector housing through a second region of the outer lens. The second region of the outer lens is located at a position closer to the second side than the first region of the outer lens, and the second infrared light emitting element is disposed at a position closer to the first side than the first infrared light emitting element.

[0036] According to this configuration, a compact vehicle-mounted infrared light projector that irradiates a wide range can be provided. The vehicle-mounted infrared light projector can house the first infrared light emitting element and the second infrared light emitting element in a relatively small light projector housing, and can irradiate infrared light with respect to the light projector housing to a wide range from the first side to the second side.

[0037] The vehicle-mounted infrared light projecting device of one embodiment of the present application includes a wiring substrate on which an infrared light emitting element is mounted; a cord for connecting the wiring substrate to the outside; a light projector frame including a metal heat dissipation member that supports the wiring substrate, an outer lens having infrared light transmittance, and a gasket formed of a resin material, the heat dissipation member and the outer lens being combined so as to sandwich the gasket, thereby housing the wiring substrate; and a cord holding portion provided as a part of the heat dissipation member on the outside of the light projector frame and covered with the gasket.

[0038] The heat dissipation member can have a heat dissipation fin and a cord passing hole, the cord holding portion can be formed on a side opposite to the heat dissipation fin with respect to the cord passing hole, and the cord can be drawn out of the light projector frame from the cord passing hole and routed to the cord holding portion.

[0039] The cord holding portion can protrude from the heat dissipation member in a direction opposite to a direction in which the cord is drawn out of the cord passing hole, and the cord can be routed so as to form a bend between the cord passing hole and the cord holding portion, and a bushing can be fitted on the cord in a range from the cord passing hole to the bend.

[0040] The vehicle-mounted infrared light projecting device can further include a protector formed of a resin material and fitted to an outer periphery of the outer lens.

[0041] The wiring substrate can be a flexible printed substrate.

[0042] The heat dissipation member can have an air hole that is open to the outside of the light projector frame.

[0043] The vehicle-mounted infrared light projecting device can be mounted to a side mirror of a vehicle.

[0044] The vehicle-mounted infrared light projecting device of one embodiment of the present application includes a light projector frame that is a light projector frame capable of being fitted to a housing provided on a vehicle, and a part of which is formed of an outer lens having infrared light transmittance, the outer lens being arranged at an opening portion of the housing when fitted to the housing; and a protector formed of a resin material and fitted between an edge of the opening portion of the housing and an outer peripheral portion of the outer lens. Inside the housing, a recess into which the protector is fitted is formed at the outer peripheral portion of the outer lens, and the protector has a drain path that connects the recess and an area outside the recess.

[0045] The drain path can be a groove formed in a surface of the protector.

[0046] The recess can be positioned at a lower portion of the housing.

[0047] The housing can be a housing of a side mirror of a vehicle.

[0048] Another aspect of the present application relates to a vehicle periphery detection device. The vehicle periphery detection device can include the vehicle-mounted infrared projector of any of the aspects described above, and a camera disposed on the vehicle so as to capture a place in the periphery of the vehicle illuminated with infrared light by the vehicle-mounted infrared projector, the camera having sensitivity to at least infrared light.

[0049] Another aspect of the present application relates to a vehicle lamp. The vehicle lamp includes a wiring board on which a light emitting element is mounted, a flexible cord for connecting the wiring board to the outside, a frame having a metal heat dissipation member that supports the wiring board, an outer lens, and a gasket formed of a resin material, the heat dissipation member and the outer lens being joined so as to sandwich the gasket, thereby housing the wiring board, and a flexible cord holding portion that is provided on the outside of the frame as part of the heat dissipation member and is covered by the gasket.

[0050] According to this aspect, the flexible cord holding portion that is part of the metal heat dissipation member is covered by the gasket. When the flexible cord is held by the flexible cord holding portion, the flexible cord does not directly contact the metal portion, and it is difficult for the flexible cord to be damaged. Thus, the flexible cord that connects the wiring board in the vehicle lamp to the outside can be protected.

[0051] Effects of the Invention

[0052] According to one aspect of the present application, a vehicle-mounted infrared projector that is compact and that irradiates a wide range can be provided. According to one aspect of the present application, a flexible cord that connects a light emitting device to the outside can be protected. According to one aspect of the present application, the possibility of water entering the vehicle-mounted infrared projector can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 is a schematic front view of a side mirror for an automobile according to an embodiment, as viewed from the front side.

[0054] Figure 2 is a schematic view showing an infrared irradiation region of a vehicle-mounted infrared projector according to an embodiment.

[0055] Figure 3 is a perspective view showing a vehicle-mounted infrared projector according to an embodiment.

[0056] Figure 4 is Figure 3 is an exploded perspective view of the vehicle-mounted infrared projector shown in FIG. 8.

[0057] Figure 5 is an expanded view of a wiring board on which an infrared light emitting element is mounted according to an embodiment.

[0058] Figure 6 is a schematic perspective view showing an assembled state of a wiring board and a heat dissipation member according to an embodiment.

[0059] Figure 7 It is a general representation Figure 1 The diagram shows a BB line cross-section of the vehicle-mounted infrared projector.

[0060] Figure 8 It is a general representation Figure 1 The diagram shows a cross-sectional view of the vehicle-mounted infrared projector along the CC line.

[0061] Figure 9 (a) and Figure 9 (b) is a schematic diagram showing the shape of the outer lens involved in the comparative example.

[0062] Figure 10 This is a diagram showing the configuration of the light-emitting elements involved in the comparative example.

[0063] Figure 11 (a) and Figure 11 (b) is a schematic perspective view showing the assembly state of the wiring board 42, heat dissipation member 30 and flexible wire 60 according to the embodiment.

[0064] Figure 12 (a) and Figure 12 (b) represents the assembly of the inner lens component 50 onto the... Figure 11 (a) and Figure 11 (b) is a schematic three-dimensional view of the state of the assembly.

[0065] Figure 13 This is a schematic front view of the vehicle-mounted infrared projector as described in the embodiment, viewed from the front.

[0066] Figure 14 It is a schematic representation Figure 13 The diagram shows a DD-line cross-section of the vehicle-mounted infrared projector.

[0067] Figure 15 This is a schematic top view of a portion of the vehicle-mounted infrared projector involved in the embodiment, viewed from above.

[0068] Figure 16 It is a schematic representation Figure 14 The diagram shows a cross-sectional view of the EE line of the vehicle-mounted infrared projector.

[0069] Figure 17 This is a schematic diagram showing the infrared illumination area of ​​the vehicle-mounted infrared projector involved in the modified example. Detailed Implementation

[0070] Hereinafter, the present invention will be described based on preferred embodiments with reference to the accompanying drawings. These embodiments are illustrative rather than limiting, and all features and combinations thereof described in the embodiments may not be the essential content of the invention. Identical or equivalent constituent elements, components, and processes shown in the various drawings are labeled with the same reference numerals, and repetitive descriptions are omitted where appropriate. Furthermore, the scales and shapes of the parts shown in the figures are for ease of explanation and are not intended to be limiting unless specifically mentioned. Additionally, the terms "first," "second," etc., used in this specification or claims do not indicate any order or importance, but are used to distinguish one structure from others. Furthermore, in the various drawings, parts indicating components that are not important in describing the embodiments are omitted.

[0071] Figure 1 This is a schematic front view of the automotive side mirror according to the embodiment, viewed from the front. The illustrated side mirror 100 is the left-side side mirror when viewing the vehicle from the front. Therefore, in Figure 1 In the center, the left side corresponds to the outer side in the vehicle's width direction, and the right side corresponds to the inner side in the vehicle's width direction. Furthermore, the right-side rearview mirror has the same structure, so it will not be described again.

[0072] The side rearview mirror 100 includes a base 101 mounted on the front door of a vehicle and a housing 102 mounted on the base 101 and holding the side rearview mirror. The housing 102 includes an upper side cover 103 and a lower side cover 104. The housing 102 is typically rotatably mounted on the base 101 to switch the side rearview mirror 100 between its extended and retracted positions. Figure 1 The deployed position is shown in the diagram. Furthermore, since the reflector is mounted at the rear of the housing 102, therefore... Figure 1 Not shown in the image.

[0073] A vehicle-mounted infrared projector 10 and a camera 110 are built into the side rearview mirror 100. The vehicle-mounted infrared projector 10 uses near-infrared light as infrared light, for example. The camera 110 is mounted on the side rearview mirror 100 to capture the infrared illumination area of ​​the vehicle-mounted infrared projector 10. The camera 110 is sensitive to at least the infrared light emitted by the vehicle-mounted infrared projector 10. The camera 110 can also be an infrared camera. The camera 110 can also use both visible light and infrared light for capturing images.

[0074] The vehicle-mounted infrared projector 10 and camera 110 are mounted on the lower side cover 104 of the housing 102, located at the bottom of the side rearview mirror 100. The vehicle-mounted infrared projector 10 and camera 110 are disposed in a relatively narrow space between the upper side cover 103 and the lower side cover 104, and housed within the housing 102. They are arranged adjacent to each other along the left and right sides in the central part of the side rearview mirror 100 in the vehicle width direction, with the vehicle-mounted infrared projector 10 located on the outer side of the vehicle width direction relative to the camera 110. However, this is only one example and is not limited to this.

[0075] The lower cover 104 of the housing 102 has an opening 105 and a shooting window 106. When the vehicle-mounted infrared projector 10 is installed, an outer lens 20 of the vehicle-mounted infrared projector 10 is disposed in the opening 105. The vehicle-mounted infrared projector 10 emits infrared light through the outer lens 20. The camera 110 captures images through the shooting window 106.

[0076] Additionally, a side turn signal 120 is provided on the side rearview mirror 100. The side turn signal 120 is positioned further outward than the vehicle-mounted infrared projector 10 and camera 110.

[0077] The vehicle perimeter detection device 130 is configured to include an in-vehicle infrared projector 10 and a camera 110. Furthermore, the vehicle perimeter detection device 130 may also include a processing unit located inside the vehicle interior, and images captured by the camera 110 can be input to this processing unit. The processing unit can also generate information related to people, objects, and other obstacles around the vehicle through image processing. The vehicle perimeter detection device 130 may also include a display device such as a monitor located inside the vehicle interior, and images captured by the camera 110 can be displayed on the display device.

[0078] Figure 2 This is a schematic diagram showing the infrared illumination area of ​​the vehicle-mounted infrared projector according to the embodiment. Two infrared projectors 10L and 10R are distributed front and rear to illuminate the road surface to the sides of the vehicle 140 with infrared light. The infrared projector 10L mounted on the left rearview mirror 100L illuminates infrared light into the illumination area 150L adjacent to the left side of the vehicle 140, and the infrared projector 10R mounted on the right rearview mirror 100R illuminates infrared light into the illumination area 150R adjacent to the right side of the vehicle 140. The infrared projectors 10L and 10R are mainly configured to illuminate the road surface around the vehicle with infrared light, so the entire area or most of the illumination area 150L and 150R is located on the road surface. However, the infrared projectors 10L and 10R can also illuminate the road surface and a part of the vehicle body, or a part of the vehicle 140 can be included in the illumination area 150L and 150R.

[0079] The illumination areas 150L and 150R are relatively long in the longitudinal direction, for example, covering approximately the entire length of the vehicle 140. The rear ends of the illumination areas 150L and 150R are farther away from the infrared projectors 10L and 10R than the front ends. Therefore, in addition to illuminating the entire area of ​​the illumination area with the target's illuminance, the infrared projectors 10L and 10R are required to be specifically oriented rearward to distribute more light over a greater distance. Furthermore, the illumination areas 150L and 150R can also be extended from the vehicle 140 in the vehicle width direction to a range of several meters (e.g., 1 to 2 meters).

[0080] Figure 3 This is a perspective view showing the vehicle-mounted infrared projector involved in the embodiment. Figure 4 yes Figure 3 An exploded perspective view of the vehicle-mounted infrared projector shown.

[0081] like Figure 3 As shown, the vehicle-mounted infrared projector 10 includes a projector frame 12 comprising an outer lens 20 and a heat dissipation component 30. Figure 4 The diagram also shows the components of a vehicle-mounted infrared projector 10 configured inside a projector housing 12. The vehicle-mounted infrared projector 10 includes: a wiring board 42 on which a first infrared emitting element 40a and a second infrared emitting element 40b are mounted; an inner lens member 50 for light distribution control; and a flexible cable 60 for connecting the wiring board 42 to the outside.

[0082] The outer lens 20 is formed, for example, from a resin material with infrared transmittance, such as acrylic resin or polycarbonate resin. The material of the lens is not particularly limited and can also be formed from other synthetic resin materials, glass, or other suitable materials with infrared transmittance. The outer lens 20 can also be colored, for example, gray or black, to block the interior of the projector frame 12.

[0083] In this embodiment, the outer lens 20 has a sealing leg 22 fixed to its outer periphery. The sealing leg 22 is used to connect the outer lens 20 to the heat dissipation member 30. The sealing leg 22 also serves to reinforce the outer lens 20. When the outer lens 20 is considered as the bottom plate of the projector frame 12 and the heat dissipation member 30 is considered as the top plate of the projector frame 12, the sealing leg 22 is equivalent to the side wall of the projector frame 12 and is disposed around the entire circumference of the outer lens 20.

[0084] As an example, the sealing leg 22 is formed of an infrared-impermeable material. Since infrared transmittance is not necessary for the sealing leg 22, it is easy to select a material with excellent strength. If the outer lens 20 and the sealing leg 22 are formed of different synthetic resin materials, a single component consisting of the outer lens 20 and the sealing leg 22 can also be manufactured by two-color molding. Furthermore, without using different types of materials while ensuring sufficient strength, the outer lens 20, including the sealing leg 22, can also be formed of an infrared-transmitting material.

[0085] The outer lens 20 and the heat dissipation component 30 are joined by a spacer 24, maintaining the airtightness of the projector frame 12. The spacer 24 is fitted to the upper edge of the sealing leg 22 of the outer lens 20, and is positioned to cover the entire circumference of the joint between the outer lens 20 and the heat dissipation component 30. For example, the heat dissipation component 30 is fixed to the sealing leg 22 using a fixing screw 26, and the spacer 24 is sandwiched between the sealing leg 22 and the outer periphery of the heat dissipation component 30. In this way, the spacer 24 also forms part of the projector frame 12. The spacer 24 is formed, for example, of EPDM (ethylene propylene diene monomer rubber), but can also be formed of other soft resin materials with waterproof properties.

[0086] Additionally, a protective element 28 is fitted onto the outer lens 20. The protective element 28 covers the entire circumference of the outer lens 20. When the projector frame 12 is fitted onto the housing 102, the protective element 28 is sandwiched between the edge of the opening 105 of the housing 102 and the outer periphery of the outer lens 20. The protective element 28 is formed, for example, of EPDM (ethylene propylene diene monomer rubber), but may also be formed of other soft resin materials with waterproof properties. Since the gap that may form between the housing 102 and the outer lens 20 is filled by the protective element 28, wind noise that may be generated during vehicle operation due to such a gap can be reduced. In addition, it can prevent moisture, dust, etc. from entering through the gap.

[0087] The heat dissipation member 30 supports the wiring substrate 42 and is in thermal contact with the first infrared light-emitting element 40a and the second infrared light-emitting element 40b on the wiring substrate 42. The inner surface shape of the heat dissipation member 30 is determined such that when the wiring substrate 42 is mounted on the heat dissipation member 30, the first infrared light-emitting element 40a adopts a first posture and the second infrared light-emitting element 40b adopts a second posture. As will be described later, the first posture and the second posture are different from each other. On the other hand, a plurality of heat dissipation fins 31 are formed on the outer surface of the heat dissipation member 30. The heat dissipation member 30 is formed of a metal material such as aluminum or aluminum alloy, or other highly thermally conductive materials. The heat generated by the light emitted by the infrared light-emitting elements 40a and 40b can be dissipated to the surroundings through the heat dissipation member 30, which can prevent the infrared light-emitting elements 40a and 40b and their surrounding components from being overheated.

[0088] The heat dissipation component 30 is provided with a wire passage hole 32 and an air hole 33. To prevent moisture from directly entering the projector frame 12 through the air hole 33, a waterproof and breathable membrane 34 is attached to the air hole 33. In this embodiment, the wire passage hole 32 is provided on one side relative to the plurality of heat dissipation fins 31, and the air hole 33 is provided on the other side. The wire passage hole 32 is located at the front of the heat dissipation component 30, and the air hole 33 is located at the rear of the heat dissipation component 30. The plurality of heat dissipation fins 31 extend along the vehicle width direction between the wire passage hole 32 and the air hole 33. However, this configuration is only one example and is not limited thereto.

[0089] If we assume there is no air vent 33, the internal air pressure may deviate from the external air pressure, at least temporarily, due to the temperature changes associated with the operating environment of the vehicle-mounted infrared projector 10 and the lighting and extinguishing of the infrared light-emitting elements 40a and 40b. In situations where the internal air pressure is lower than the external air pressure, for example, air may flow into the projector frame 12 through tiny gaps that may exist between the outer lens 20 and the pad 24, or between the heat dissipation member 30 and the pad 24. At this time, it is also estimated that ambient moisture will be introduced into the projector frame 12 along with the airflow, but this is undesirable.

[0090] In this embodiment, since the projector frame 12 is ventilated to the outside through the air hole 33, the pressure difference between the inside and outside can be easily mitigated. Therefore, the air hole 33 helps to prevent moisture from entering the projector frame 12 from the outside.

[0091] The first infrared emitting element 40a is configured for forward illumination, and the second infrared emitting element 40b is configured for rearward illumination. Figure 4 In this embodiment, the second infrared light-emitting element 40b is located on the back side of the wiring substrate 42 and cannot be directly seen, but it is represented by a dashed line for ease of understanding. The infrared light-emitting elements 40a and 40b are infrared LEDs in this embodiment, but are not particularly limited and can be other semiconductor light-emitting elements or other arbitrary light-emitting elements. The infrared light-emitting elements 40a and 40b emit near-infrared light with wavelengths including, for example, 800–1000 nm (where, for example, 920–960 nm).

[0092] Furthermore, in this embodiment, the first infrared light-emitting element 40a is a single infrared LED, but it can also be a group of infrared LEDs or light-emitting elements. The same applies to the second infrared light-emitting element 40b. Additionally, if necessary, a third infrared light-emitting element can be provided in the vehicle-mounted infrared projector 10 to illuminate infrared light in a direction different from that of the first infrared light-emitting element 40a and the second infrared light-emitting element 40b.

[0093] Wiring substrate 42 is a flexible printed circuit board, inFigure 4 The wiring board 42 is shown bent in order to be mounted on the heat sink 30. Infrared light-emitting elements 40a and 40b and connector 43 are mounted on the same surface of the flexible printed circuit board. The flexible wire 60 is connected to the connector 43, providing electrical connection to the infrared light-emitting elements 40a and 40b.

[0094] A first support plate 44a and a second support plate 44b are bonded to the surface of the wiring substrate 42 opposite to the mounting surface. The first support plate 44a is located on the back side of the first infrared light-emitting element 40a, and the second support plate 44b is located on the back side of the second infrared light-emitting element 40b. These support plates 44a and 44b are made of metal, or may be formed of the same or different type of material as the heat dissipation member 30. The support plates 44a and 44b are in surface contact with the surface of the heat dissipation member 30, and function as heat transfer members for dissipating heat from the infrared light-emitting elements 40a and 40b to the heat dissipation member 30. The support plates 44a and 44b reinforce the wiring substrate 42 and also help stabilize the posture of the infrared light-emitting elements 40a and 40b when mounted on the heat dissipation member 30.

[0095] Furthermore, as a variation, a first wiring substrate having a first infrared light-emitting element 40a and a second wiring substrate having a second infrared light-emitting element 40b can be provided instead of mounting the infrared light-emitting elements 40a and 40b on a single wiring substrate 42. In this case, the wiring substrate can be a flexible substrate or a rigid substrate.

[0096] The inner lens component 50 is mounted on the heat dissipation component 30 and disposed between the outer lens 20 and the wiring substrate 42. The inner lens component 50 has a first inner lens 52a for controlling infrared light from the first infrared emitting element 40a and a second inner lens 52b for controlling infrared light from the second infrared emitting element 40b.

[0097] Furthermore, the inner lens member 50 is provided with a first lens mounting portion 54a for mounting the first inner lens 52a to the heat dissipation member 30 and a second lens mounting portion 54b for mounting the second inner lens 52b to the heat dissipation member 30. When the first lens mounting portion 54a and the second lens mounting portion 54b are mounted on the heat dissipation member 30, the first inner lens 52a is positioned relative to the first infrared light-emitting element 40a, and the second inner lens 52b is positioned relative to the second infrared light-emitting element 40b.

[0098] The inner lens component 50 is a single optical component integrally formed from the first inner lens 52a, the second inner lens 52b, the first lens mounting portion 54a, and the second lens mounting portion 54b. Like the outer lens 20, the inner lens component 50 is formed from an infrared-transmitting resin material or other infrared-transmitting material. The inner lens component 50 may also be colorless and transparent. Furthermore, if the desired light distribution control is provided by the outer lens 20, the inner lens component 50 may be omitted.

[0099] As described above, one end of the flexible wire 60 disposed within the projector housing 12 is connected to the connector 43 on the wiring board 42. The flexible wire 60 is led out of the projector housing 12 through the flexible wire through hole 32. To maintain the airtightness at the flexible wire through hole 32, a bushing 61 is fitted on the flexible wire 60, and the gap between the flexible wire through hole 32 and the flexible wire 60 is sealed by the bushing 61. The connector 62 disposed at the other end of the flexible wire 60 can connect to other wiring harnesses, and the vehicle-mounted infrared projector 10 can be connected to an external power source such as a vehicle battery via these wiring harnesses.

[0100] The cable holding portion 70 is provided on the outside of the projector frame 12 as part of the heat dissipation member 30. As an example, the cable holding portion 70 is formed as a claw-shaped cable clip and is positioned near the cable passage hole 32. A cover portion 24a is formed on the pad 24 to cover the cable holding portion 70. Since the cable holding portion 70, which is part of the metal heat dissipation member 30, is partially covered by the pad 24, the cable 60 does not directly contact the metal part when held by the cable holding portion 70, and the cable 60 is less likely to be damaged. The cable 60 is protected by the cable holding portion 70.

[0101] Figure 5 This is an unfolded view of the wiring substrate (flexible printed circuit board) equipped with an infrared light-emitting element according to the embodiment. As shown, the wiring substrate 42 has a generally U-shaped shape. A connector 43 and a first infrared light-emitting element 40a are disposed on one of the two longitudinal sides forming the U-shape. The connector 43 is disposed at the upper end of the longitudinal side, and the first infrared light-emitting element 40a is disposed at the lower end of the same longitudinal side. A second infrared light-emitting element 40b is disposed at the upper end of the other longitudinal side of the U-shape.

[0102] As described above, on the side of the flexible printed circuit board opposite to the mounting surface, a first support plate 44a is attached to the back side of the first infrared light-emitting element 40a to support the first infrared light-emitting element 40a. A second support plate 44b is attached to the back side of the second infrared light-emitting element 40b to support the second infrared light-emitting element 40b. Unlike the first support plate 44a, the second support plate 44b extends along the entire length of the longitudinal side of the U-shape. Furthermore, the first support plate 44a and the second support plate 44b are bonded to the back side and insulated from the circuit patterns on the substrate, thus not participating in the electrical connection to the first infrared light-emitting element 40a and the second infrared light-emitting element 40b.

[0103] Two positioning holes 80a and 80b are formed on the first support plate 44a near the first infrared light-emitting element 40a. One of the positioning holes 80b is connected to the outer peripheral contour of the first support plate 44a. These two positioning holes 80a and 80b are used to position the first inner lens 52a relative to the first infrared light-emitting element 40a. Additionally, two positioning holes 81a and 81b are formed on the second support plate 44b near the second infrared light-emitting element 40b. These two positioning holes 81a and 81b are used to position the second inner lens 52b relative to the second infrared light-emitting element 40b.

[0104] Additionally, a first flexible portion 45a and a second flexible portion 45b are provided on the wiring substrate 42. The first flexible portion 45a corresponds to the longitudinal side of the U-shaped connector 43 and extends from the connector 43 toward the first infrared light-emitting element 40a. Since the first support plate 44a is not provided on the first flexible portion 45a, the first flexible portion 45a can be bent. The second flexible portion 45b corresponds to the transverse side of the U-shape. Since the first support plate 44a and the second support plate 44b are not provided on the second flexible portion 45b, the second flexible portion 45b can be bent.

[0105] Figure 6 This is a schematic perspective view showing the assembled state of the wiring board 42 and the heat dissipation member 30 according to the embodiment. A first inclined surface 35a and a second inclined surface 35b are provided on the heat dissipation member 30. A first support plate 44a of the wiring board 42 is mounted on the first inclined surface 35a, and a second support plate 44b is mounted on the second inclined surface 35b. Thus, the first infrared light-emitting element 40a is supported by the first inclined surface 35a via the first support plate 44a, and the second infrared light-emitting element 40b is supported by the second inclined surface 35b via the second support plate 44b. By bending the first flexible portion 45a and the second flexible portion 45b, the wiring board 42 can be mounted on the heat dissipation member 30 in such a way that the first infrared light-emitting element 40a and the second infrared light-emitting element 40b each have their own mounting posture.

[0106] In the case where two light-emitting elements are mounted on different substrates, each substrate might require a connector. However, in this embodiment, since both the first infrared light-emitting element 40a and the second infrared light-emitting element 40b are located on the wiring substrate 42 and electrically connected, only one connector 43 is needed. The wiring substrate 42 can be stored in the projector frame 12 in a space-saving manner.

[0107] In addition Figure 6 The diagram of connector 43 and flexible wire 60 is omitted, but connector 43 is positioned adjacent to the flexible wire through hole 32.

[0108] Figure 7 It is a general representation Figure 1 The diagram shows a BB line cross-section of the vehicle-mounted infrared projector. Figure 8 It is a general representation Figure 1 The diagram shows a cross-sectional view of the vehicle-mounted infrared projector along the CC line. Figure 7 The image shows a cross-section of the vertical plane at the location of the second infrared emitting element 40b. Figure 8 The diagram shows a vertical cross-section at the location of the first infrared emitting element 40a. To facilitate understanding of the positional relationship between the first infrared emitting element 40a and the second infrared emitting element 40b in the front-back direction (left-right direction in the diagram), the diagram is shown below. Figure 7 The first infrared emitting element 40a is represented by a dashed line.

[0109] like Figure 7 and Figure 8 As shown, the outer lens 20 has a first region 20a and a second region 20b. Both the first region 20a and the second region 20b are formed of an infrared-transmitting material. The first region 20a and the second region 20b are adjacent to each other, with the second region 20b located behind the first region 20a.

[0110] The first infrared emitting element 40a illuminates infrared light IR1 forward and downward through the first region 20a of the outer lens 20. The second infrared emitting element 40b illuminates infrared light IR2 backward and downward through the second region 20b of the outer lens 20. The second infrared emitting element 40b is positioned forward of the first infrared emitting element 40a. The second infrared emitting element 40b is located above the first region 20a of the outer lens 20, and the first infrared emitting element 40a is located above the second region 20b of the outer lens 20.

[0111] The first infrared emitting element 40a and the second infrared emitting element 40b are configured in different orientations. The first infrared emitting element 40a is configured in a first orientation to allow infrared ray IR1 to enter the first region 20a of the outer lens 20, and the second infrared emitting element 40b is configured in a second orientation to allow infrared ray IR2 to enter the second region 20b of the outer lens 20. That is, the first infrared emitting element 40a is configured in a first tilted orientation opposite to the first region 20a of the outer lens 20, and the second infrared emitting element 40b is configured in a second tilted orientation opposite to the second region 20b of the outer lens 20.

[0112] A first inner lens 52a is disposed between a first infrared emitting element 40a and a first region 20a of an outer lens 20. The first inner lens 52a is optically designed to control the incident infrared radiation from the first infrared emitting element 40a to obtain emitted infrared radiation toward the first region 20a of the outer lens 20. A second inner lens 52b is disposed between a second infrared emitting element 40b and a second region 20b of the outer lens 20. The second inner lens 52b is optically designed to control the incident infrared radiation from the second infrared emitting element 40b to obtain emitted infrared radiation toward the second region 20b of the outer lens 20.

[0113] The outer lens 20 is shaped to extend outward from the opening 105 of the housing 102 when the projector frame 12 is assembled to the housing 102. Specifically, the first region 20a of the outer lens 20 is shaped to bulge outward from the opening 105. The second region 20b of the outer lens 20 is substantially coplanar with the rear portion of the lower cover 104 and is substantially parallel to the horizontal plane. As described above, the projector frame 12 is housed in the space between the upper cover 103 and the lower cover 104 of the housing 102.

[0114] Utilizing the bow-shaped extension of the outer lens 20, the second infrared emitting element 40b is positioned below the leading edge 105a of the opening 105 of the housing 102. Thus, compared to a position where the second infrared emitting element 40b is positioned above the leading edge 105a of the opening 105, the infrared radiation IR2 emitted from the second infrared emitting element 40b at a downward and rearward angle is less likely to be blocked by the trailing edge 105b of the opening 105. Therefore, the vehicle-mounted infrared projector 10 can project infrared radiation IR2 further rearward.

[0115] The first infrared emitting element 40a is located directly above the first inclined surface 35a of the heat dissipation member 30, separated by the first support plate 44a. In contrast, the second infrared emitting element 40b is located on the second support plate 44b, but not directly above the second inclined surface 35b of the heat dissipation member 30. The second infrared emitting element 40b can be positioned further below by extending the second support plate 44b from the second inclined surface 35b toward the first region 20a of the outer lens 20.

[0116] An optical step for diffusing infrared radiation IR1 is formed on the inner surface 21a of the first region 20a of the outer lens 20. The optical step may be cylindrical, but may also be serrated or have other irregular shapes.

[0117] On the other hand, the inner surface 21b of the second region 20b of the outer lens 20 slopes downward from the rear edge of the second region 20b toward the front edge. The shape of the outer lens 20 is determined such that the wall thickness of the second region 20b (i.e., the thickness from the inner surface 21b of the second region 20b to the outer surface 21c) gradually decreases from the rear edge of the second region 20b toward the front edge.

[0118] An optical step is formed on the inner surface 21b of the second region 20b to diffuse the infrared radiation IR2 emitted from the second region 20b in the left-right direction. The optical step is, for example, cylindrical in shape. Multiple cylindrical steps extend along the front-back direction and in the left-right direction (…). Figure 7 Arranged along the depth direction of the paper. Therefore, as Figure 7 As shown, the inner surface 21b of the second region 20b forms a smooth inclined surface in the front-back direction. Where optically desirable, the optical step can extend in other directions or have a serrated or other uneven shape. Alternatively, the inner surface 21b of the second region 20b may not have an optical step.

[0119] The outer surface 21c of the second region 20b is a flat surface that is substantially parallel to the horizontal plane when the projector frame 12 is assembled into the housing 102. The outer surface 21c of the second region 20b does not have so-called optical steps with serrations or other uneven shapes, which gives the vehicle-mounted infrared projector 10 a clean appearance.

[0120] When infrared IR2 is emitted obliquely downwards and backwards from the second infrared emitting element 40b, the inner surface 21b of the second region 20b can be positioned opposite to the second infrared emitting element 40b. Thus, the inner surface 21b of the second region 20b is configured at an angle orthogonal to or close to the optical axis of the second infrared emitting element 40b, reducing the angle of incidence from the second infrared emitting element 40b onto the second region 20b of the outer lens 20. Reflection of infrared light incident on the inner surface 21b of the second region 20b of the outer lens 20 is suppressed, allowing the vehicle-mounted infrared projector 10 to emit more infrared light through the second region 20b of the outer lens 20.

[0121] Figure 9 (a) and Figure 9 (b) is a schematic diagram showing the shape of the outer lens involved in the comparative example. Figure 9 (a) indicates the case where a step 38 is provided on the outer surface of the outer lens 20. Figure 9 (b) indicates the case where a step 39 is provided on the inner surface of the outer lens 20. In principle, by providing a step on the surface of the outer lens as described above, the reflection of infrared light incident from the infrared light source 37 into the outer lens 20 from the inner surface can be suppressed, and the infrared light can be directed towards the target. However, Figure 9 As shown in (a), the step 38 on the outer surface of the outer lens has unevenness on the appearance surface, thus detracting from the appearance of the projector. Additionally, as... Figure 9 As shown in (b), due to the presence of the sealing leg 22, there is not enough space on the inner surface of the outer lens to provide the step 39.

[0122] According to the structure described above, the vehicle-mounted infrared projector 10 emits infrared rays IR1 and IR2 through the outer lens 20 after the first infrared emitting element 40a and the second infrared emitting element 40b are lit. As a result, for example, it can illuminate... Figure 2 The irradiation areas shown are 150L and 150R.

[0123] Therefore, according to the embodiment, the vehicle-mounted infrared projector 10 can house the first infrared emitting element 40a and the second infrared emitting element 40b within a relatively small projector housing 12, and can widely illuminate the sides of the vehicle both front and rear. This provides a compact vehicle-mounted infrared projector 10 with a wide illumination range.

[0124] Figure 10This diagram illustrates the configuration of the light-emitting elements involved in the comparative example. If the two infrared light-emitting elements 40a and 40b are arranged in a front-to-back configuration, as shown in the diagram, these infrared light-emitting elements 40a and 40b must be positioned close to the outer lens 20. Therefore, it is difficult to ensure sufficient space for the inner lenses 52a and 52b between the infrared light-emitting elements 40a and 40b and the outer lens 20. As shown by the dashed line, if the outer lens 20 is moved away from the infrared light-emitting elements 40a and 40b, space can be obtained for the inner lenses 52a and 52b, but this simply increases the size of the infrared projector.

[0125] Furthermore, assuming that two infrared emitting elements 40a and 40b are arranged adjacent to each other in the same orientation on a planar substrate, the infrared illumination directions from the two infrared emitting elements 40a and 40b become the same in this state. To make the illumination directions different, the infrared radiation from at least one of the emitting elements must be direction-converted. However, additional space may be required to configure the optical elements used for this.

[0126] According to the embodiment, the first infrared emitting element 40a and the second infrared emitting element 40b can be configured in different suitable orientations. Compared with the case where these infrared emitting elements 40a and 40b are restricted to the same orientation, the orientation of each infrared emitting element 40a and 40b can be increased in terms of design freedom, which is expected to facilitate the design of a more compact vehicle-mounted infrared projector 10. More specifically, the first infrared emitting element 40a is configured in a first orientation to illuminate infrared IR1 at a forward oblique downward position, and the second infrared emitting element 40b is configured in a second orientation to illuminate infrared IR2 at a rearward oblique downward position. In this way, the extended illumination areas 150L and 150R can be illuminated with a compact vehicle-mounted infrared projector 10.

[0127] Furthermore, in the implementation method, such as from Figures 4 to 8 As understood, the first infrared emitting element 40a and the second infrared emitting element 40b are configured to be offset from each other horizontally. In this way, it is easy to configure the other emitting element in a manner that does not block the infrared light emitted from one emitting element.

[0128] Corresponding to the configuration of the infrared light-emitting elements 40a and 40b, the first inner lens 52a and the second inner lens 52b are arranged in a left-right configuration. This allows the two inner lenses 52a and 52b to be positioned at the same location in the front-back direction. Furthermore, compared to preparing the two inner lenses 52a and 52b as separate components, this arrangement saves space and simplifies installation.

[0129] Figure 11 (a) and Figure 11(b) is a schematic perspective view showing the assembly state of the wiring board 42, heat dissipation member 30 and flexible wire 60 according to the embodiment. Figure 11 (a) shows a view of the assembly viewed from the optical axis direction of the first infrared emitting element 40a. Figure 11 (b) shows a view of the assembly as seen from the optical axis direction of the second infrared emitting element 40b. Additionally, Figure 12 (a) and Figure 12 (b) respectively represent the assembly of the inner lens component 50 onto the... Figure 11 (a) and Figure 11 (b) is a schematic three-dimensional view of the state of the assembly.

[0130] Reference Figure 11 (a) and Figure 12 In (a), the positioning protrusions 82a and 82b formed on the inner lens member 50 engage with the positioning holes 80a and 80b of the wiring substrate 42, thereby positioning the first inner lens 52a relative to the first infrared emitting element 40a. Furthermore, the positioning holes 80b and the positioning protrusions 82b are arranged adjacent to each other on the first inclined surface 35a of the heat dissipation member 30 and combine to form a common fastening part, which is fixed to the heat dissipation member 30 by a common fastening screw 83. This achieves a space-saving fixation compared to separately fixing the first inner lens 52a and the first support plate 44a to the heat dissipation member 30 using dedicated fixing screws.

[0131] Reference Figure 11 (b) and Figure 12 (b) The positioning protrusions 84a and 84b formed on the inner lens member 50 respectively engage with the positioning holes 81a and 81b of the wiring substrate 42, thereby positioning the second inner lens 52b relative to the second infrared emitting element 40b. Further, a convex portion 85 is formed on the inner lens member 50, and a concave portion 86 is formed on the second support plate 44b. The convex portion 85 and the concave portion 86 are arranged adjacent to each other on the second inclined surface 35b of the heat dissipation member 30, and are combined to form a common fastening portion, which is fixed to the heat dissipation member 30 by a common fastening screw 87. In this way, compared to separately fixing the second inner lens 52b and the second support plate 44b to the heat dissipation member 30 using dedicated fixing screws, a space-saving fixing method can be achieved.

[0132] Figure 13 This is a schematic front view of the vehicle-mounted infrared projector as described in the embodiment, viewed from the front. Figure 14 It is a schematic representation Figure 13 The diagram shows a DD-line cross-section of the vehicle-mounted infrared projector. Figure 14In the diagram, for ease of understanding, the path 60 passes through is represented by a dashed line.

[0133] like Figure 14 As shown, a connector 63 is provided at one end of the flexible wire 60 disposed within the projector housing 12, and this connector 63 is connected to a connector 43 on the wiring board 42. As described above, the flexible wire 60 is led out of the projector housing 12 from the flexible wire through hole 32 provided on the heat dissipation member 30. A bushing 61 is fitted onto the flexible wire 60, and the gap between the flexible wire through hole 32 and the flexible wire 60 is sealed by the bushing 61. The bushing 61 is formed, for example, of a rubber material such as EPDM (ethylene propylene diene monomer rubber), but may also be formed of other synthetic resin materials with waterproof properties.

[0134] The flexible wire 60, which is led out from the wire through hole 32 to the outside of the projector frame 12, is routed to the flexible wire holding portion 70. The flexible wire holding portion 70 is formed on the side opposite to the heat dissipation fins 31 relative to the wire through hole 32. In this embodiment, the flexible wire holding portion 70 is located on the front side of the heat dissipation member 30 relative to the wire through hole 32, and the heat dissipation fins 31 are located on the rear side of the heat dissipation member 30 relative to the wire through hole 32. Thus, the flexible wire 60 led out from the wire through hole 32 is routed to the flexible wire holding portion 70 on the side opposite to the heat dissipation fins 31. The leading edge of the heat dissipation fins 31 is made of metal and is sharp, but this avoids contact between such parts and the flexible wire 60.

[0135] The cable holding portion 70 protrudes from the heat dissipation member 30 in the opposite direction to the direction in which the cable 60 is led out from the cable passage hole 32. The cable 60 is led outward from the projector frame 12 by passing through the cable passage hole 32 from bottom to top, while the cable holding portion 70 protrudes downward from the heat dissipation member 30. The cable 60 is routed in such a way that a bend 65 is formed between the cable passage hole 32 and the cable holding portion 70, and the bushing 61 is fitted onto the cable 60 within the range from the cable passage hole 32 to the bend 65. By bending the cable 60 and the bushing 61, the cable 60 can be compactly concentrated near the projector frame 12. This reduces the possibility of interference between the cable 60 and other surrounding components and structures.

[0136] Additionally, the elastic restoring force (in) required for the bushing 61 to return to its original straight state after bending is achieved. Figure 14 (Indicated by arrow 66) This mechanism pulls the wire 60, which is held in the wire holding part 70, toward the bushing 61. This allows the wire 60 to be held in the wire holding part 70 more reliably.

[0137] As described above, the cable holding portion 70 is covered by the cover portion 24a, which is part of the pad 24. The cable holding portion 70 is part of the metal heat dissipation member 30, but the cable 60 does not directly contact the metal surface of the cable holding portion 70 when it is held there. Therefore, there is almost no possibility of the cable 60 being damaged by the cable holding portion 70. In addition, by holding the cable 60 by the cable holding portion 70, it is possible to suppress the vibration of the cable 60 caused by vibrations that may occur during vehicle operation.

[0138] Furthermore, the flexible cord 60 is held in place by the pad 24 (i.e., the cover 24a) and the protective member 28 through the flexible cord holding portion 70. Like the pad 24, the protective member 28 is also formed of a soft resin material. This allows the flexible cord 60 to be held more reliably in the flexible cord holding portion 70.

[0139] like Figure 13 As shown, a flexible wire pressing part 72 is also provided on the vehicle-mounted infrared projector 10. The flexible wire pressing part 72 is provided on the outside of the projector frame 12 as part of the outer lens 20. More specifically, the flexible wire pressing part 72 is part of the sealing leg 22 of the outer lens 20 and extends from the sealing leg 22 toward the heat dissipation member 30. The flexible wire holding part 70 and the flexible wire pressing part 72 are configured to be adjacent to each other on the left and right sides of the front center of the vehicle-mounted infrared projector 10. The flexible wire 60 passing through the flexible wire holding part 70 is pressed by the flexible wire pressing part 72 near the projector frame 12, bends upward and extends to the connector 62 at the other end. Similar to the flexible wire holding part 70, the flexible wire pressing part 72 also helps to keep the flexible wire 60 near the projector frame 12.

[0140] Figure 15 This is a schematic top view showing a portion of the vehicle-mounted infrared projector involved in the embodiment, viewed from above. Figure 15 The text is a jumbled collection of characters and phrases, seemingly from different sources and lacking coherent sentences. A direct translation wouldn't be meaningful. Figure 1 The interior of the housing 102 shown is the rear of the vehicle-mounted infrared projector 10 when viewed from above. Figure 16 It is a schematic representation Figure 15 The diagram shows a cross-sectional view of the EE line of the vehicle-mounted infrared projector.

[0141] As described above, the protective member 28 is clamped between the edge of the opening 105 of the housing 102 and the outer periphery of the outer lens 20. Inside the housing 102, a recess 90 edged by the protective member 28 is formed on the outer periphery of the outer lens 20. In this embodiment, a sealing leg 22 is provided on the outer lens 20, so the recess 90 can also be defined by the protective member 28 and the sealing leg 22.

[0142] Because the recess 90 is located on the outside of the projector frame 12, water may accumulate when water enters the housing 102. In this embodiment, the vehicle-mounted infrared projector 10 is mounted on the lower side cover 104. Figure 1 The recess 90 is located in the lower part (e.g., the bottom) of the housing 102, so water that has been immersed in the housing 102 can easily flow into the recess 90.

[0143] The protective member 28 has a drainage channel 92 connecting the recess 90 to the outer region 91 of the recess 90. In this embodiment, the drainage channel 92 is a groove formed on the surface of the protective member 28. As described above, the protective member 28 is formed of a solid rubber such as EPDM (ethylene propylene diene monomer rubber), so the drainage channel 92 is integrally formed with the protective member 28. The shape of the drainage channel 92 is not limited to a groove; the drainage channel 92 can also be other cuts or through holes formed in the protective member 28 for drainage.

[0144] Furthermore, when the vehicle-mounted infrared projector 10 is mounted on the housing 102 in an inclined position and the recess 90 is also inclined, the drainage channel 92 can also be provided on the protective member 28 along the downward flow direction of the water. For example, the drainage channel 92 can also be formed on the protective member 28 in such a way that it connects the lowermost part of the recess 90 or its vicinity to the outer region 91.

[0145] The projector frame 12 has a waterproof structure. Specifically, as described above, the outer lens 20 and the heat dissipation member 30 constituting the projector frame 12 are joined by a sandwiched pad 24, and a waterproof and breathable membrane 34 is adhered to the air vent 33 of the heat dissipation member 30. Even if water accumulates in the recess 90, the recess 90 is located outside the projector frame 12. Therefore, as long as the waterproof structure functions effectively, water will not seep into the projector frame 12 from the recess 90.

[0146] However, for example, if the waterproof structure deteriorates and the waterproof performance decreases due to long-term use of the vehicle-mounted infrared projector 10, there is a risk that water may seep into the projector frame 12 from the outside. The more water accumulates around the projector frame 12, the higher the risk of water intrusion.

[0147] According to the embodiment, since a drainage channel 92 is provided in the protective member 28, even if water flows into the recess 90, such as Figure 16 As indicated by arrow 93, water can also be drained from the recess 90 into the outer region 91 of the recess 90 through the drainage passage 92 within the housing 102. Therefore, even if water enters the housing 102, it is difficult for water to accumulate in the recess 90, thus reducing the risk of water entering the vehicle-mounted infrared projector 10.

[0148] This invention is not limited to the embodiments and modifications described above. It is also possible to combine embodiments and modifications, or to apply various design changes and other further modifications based on the knowledge of those skilled in the art. Such combinations or embodiments and modifications with further modifications are also included within the scope of this invention. The embodiments and modifications described above, as well as new embodiments resulting from combinations of the above embodiments and modifications with the following modifications, combine the advantages of the combined embodiments, modifications, and further modifications.

[0149] In the above-described embodiment, the vehicle-mounted infrared projector 10 is configured to illuminate the road surface on the sides of the vehicle with infrared rays all around the front and rear, but the present invention is not limited thereto. Figure 17 This is a schematic diagram showing the infrared illumination area of ​​the vehicle-mounted infrared projector involved in the modified example. As shown, the infrared projector 10F mounted at the front of the vehicle 140 can also illuminate infrared light into an illumination area 150F that extends laterally on the road surface in front of the vehicle 140. In this case, the first infrared emitting element may be configured to illuminate the left (or right) side relative to the projector frame through a first area of ​​the outer lens, and the second infrared emitting element may be configured to illuminate the right (or left) side relative to the projector frame through a second area of ​​the outer lens. Similarly, the infrared projector 10B mounted at the rear of the vehicle 140 can also illuminate infrared light into an illumination area 150B that extends laterally on the road surface behind the vehicle 140. If these infrared projectors 10F and 10B are used in conjunction with the aforementioned infrared projectors 10L and 10R, the entire area around the vehicle 140 can also be illuminated with infrared light.

[0150] In a more generalized manner, the vehicle-mounted infrared projector may include: a first infrared emitting element disposed inside the projector frame, illuminating a first side of the projector frame through a first region of an outer lens; and a second infrared emitting element disposed inside the projector frame, illuminating a second side of the projector frame opposite to the first side through a second region of the outer lens. Alternatively, the second region of the outer lens may be located on a second side further than the first region of the outer lens, and the second infrared emitting element may be disposed on a first side further than the first infrared emitting element.

[0151] In the above embodiments, the example described is of the vehicle-mounted infrared projector 10 and camera 110 being mounted on a door mirror. However, the vehicle-mounted infrared projector 10 and camera 110 can also be mounted on mudguard mirrors, rearview mirrors, or other parts of the vehicle. Furthermore, in the above embodiments, the vehicle-mounted infrared projector 10 and camera 110 are installed in the same housing 102, but this is not a limitation. The vehicle-mounted infrared projector 10 and camera 110 can also be installed in different housings or different parts of the vehicle. For example, the vehicle-mounted infrared projector 10 and camera 110 can also be integrated into side turn signals 120, vehicle headlights, or other vehicle lighting fixtures.

[0152] This invention is not limited to the vehicle-mounted infrared projector 10. For example, the projector 10 may also be used as a vehicle lighting fixture by incorporating a visible light emitting element instead of an infrared emitting element (or together with an infrared emitting element). For example, the flexible wire holding part 70 described in the embodiment can also be applied to such a vehicle lighting fixture. This protects the flexible wire 60 that connects the wiring board inside the vehicle lighting fixture to the outside.

[0153] Based on the implementation methods, the present invention has been described using specific statements. However, the implementation methods only illustrate one aspect of the principle and application of the present invention. Various modifications and configuration changes can be made to the implementation methods without departing from the spirit of the present invention as defined in the claims.

[0154] Industrial availability

[0155] This invention can be applied to vehicle-mounted infrared projectors, vehicle peripheral detection devices, and vehicle lighting fixtures.

[0156] Explanation of reference numerals in the attached figures

[0157] 10: Vehicle-mounted infrared projector; 12: Projector frame; 20: Outer lens; 20a: First area; 20b: Second area; 24: Gasket; 28: Protective component; 30: Heat dissipation component; 31: Heat dissipation fins; 32: Flexible wire passage hole; 33: Air hole; 40a: First infrared emitting element; 40b: Second infrared emitting element; 42: Wiring board; 50: Inner lens component; 52a: First inner lens; 52b: Second inner lens; 60: Flexible wire; 61: Bushing; 65: Bending part; 70: Flexible wire holding part; 90: Recess; 91: Outer area; 92: Drainage channel; 100: Side rearview mirror; 102: Housing; 105: Opening; 110: Camera; 130: Vehicle peripheral detection device; 140: Vehicle.

Claims

1. A vehicle-mounted infrared projector, characterized in that it illuminates the road surface to the sides of the vehicle with infrared rays from both the front and rear, and is characterized in that... The vehicle-mounted infrared projector has the following features: A projector frame is a projector frame that can be mounted on a housing installed on a vehicle, and a portion thereof is formed by an outer lens that is infrared-transmitting. When mounted on the housing, the outer lens is positioned at an opening of the housing. The first infrared emitting element is disposed inside the projector frame and irradiates infrared light diagonally downwards and forwards of the vehicle through the first area of ​​the outer lens. as well as The second infrared emitting element is disposed inside the projector frame and irradiates infrared light diagonally downwards and rearwards onto the vehicle through the second area of ​​the outer lens. The second region of the outer lens is located further behind the vehicle than the first region of the outer lens. The second infrared emitting element is positioned further forward of the vehicle than the first infrared emitting element. The housing is the housing of the side rearview mirror of the vehicle.

2. The vehicle-mounted infrared projector according to claim 1, characterized in that, The first infrared emitting element is configured in a first posture to allow infrared light to enter the first region of the outer lens. The second infrared emitting element is configured to emit infrared light into a second region of the outer lens in a second posture that is different from the first posture.

3. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The inner surface of the second region of the outer lens slopes downward from the rear edge of the second region toward the front edge.

4. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The shape of the outer lens is determined to be configured to extend outward from the opening of the housing when the projector frame is assembled into the housing. The second infrared emitting element is positioned below the leading edge of the opening of the housing.

5. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The vehicle-mounted infrared projector also includes a flexible printed substrate, on which the first infrared light-emitting element and the second infrared light-emitting element are mounted.

6. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The first infrared light-emitting element and the second infrared light-emitting element are configured to be offset from each other along the left and right sides.

7. The vehicle-mounted infrared projector according to claim 6, characterized in that, The vehicle-mounted infrared projector also includes an inner lens component, which has a first inner lens and a second inner lens. The first inner lens is disposed between the first infrared emitting element and the first region of the outer lens, and the second inner lens is disposed between the second infrared emitting element and the second region of the outer lens. The first inner lens and the second inner lens are arranged in a left-right configuration and are integrally formed.

8. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The projector frame includes a heat dissipation component that supports the first infrared emitting element and the second infrared emitting element, and is hermetically combined with the outer lens to form the projector frame. The heat dissipation component has air holes that allow ventilation to the outside of the projector frame.

9. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The vehicle-mounted infrared projector also features: A wiring board having at least one of the first infrared light-emitting element and the second infrared light-emitting element; A flexible wire, used to connect the wiring board to the outside; as well as Wire holding section The projector frame also includes a metal heat dissipation component supporting the wiring board and a pad made of resin material. The heat dissipation component and the outer lens are coupled by being sandwiched into the pad, thereby accommodating the wiring board. The flexible cord retainer is disposed on the outside of the projector frame as part of the heat dissipation component and is covered by the pad.

10. The vehicle-mounted infrared projector according to claim 9, characterized in that, The heat dissipation component has heat dissipation fins and a wire passage hole, and the wire holding portion is formed on the side opposite to the heat dissipation fins relative to the wire passage hole. The flexible wire is led out from the flexible wire through hole to the outside of the projector frame and wired to the flexible wire holding part.

11. The vehicle-mounted infrared projector according to claim 10, characterized in that, The flexible wire holding portion protrudes from the heat dissipation member in a direction opposite to the direction in which the flexible wire is led out from the hole. The flexible wire is routed such that a bend is formed between the flexible wire through hole and the flexible wire holding portion, and a bushing is fitted on the flexible wire in the range from the flexible wire through hole to the bend.

12. The vehicle-mounted infrared projector according to claim 9, characterized in that, The vehicle-mounted infrared projector also includes a protective component made of resin material, which is fitted onto the outer periphery of the outer lens. The flexible cord is held in the cord holding portion by the pad and the protective member.

13. The vehicle-mounted infrared projector according to claim 9, characterized in that, The wiring substrate is a flexible printed circuit board.

14. The vehicle-mounted infrared projector according to claim 9, characterized in that, The heat dissipation component has air holes that allow ventilation to the outside of the projector frame.

15. The vehicle-mounted infrared projector according to claim 1 or 2, characterized in that, The vehicle-mounted infrared projector also includes a protective component made of resin material, which is sandwiched between the edge of the opening of the housing and the outer periphery of the outer lens. Inside the housing, a recess formed on the outer periphery of the outer lens, edged by the protective member, is provided. The protective element has a drainage channel connecting the recess to the outer region of the recess.

16. The vehicle-mounted infrared projector according to claim 15, characterized in that, The drainage channel is a groove formed on the surface of the protective component.

17. The vehicle-mounted infrared projector according to claim 15, characterized in that, The recess is located at the lower part of the housing.

18. A vehicle-mounted infrared projector, characterized in that, The vehicle-mounted infrared projector has the following features: A projector frame is a projector frame that can be mounted on a housing installed on a vehicle, and a portion thereof is formed by an outer lens that is infrared-transmitting. When mounted on the housing, the outer lens is positioned at an opening of the housing. A first infrared emitting element, disposed inside the projector frame, illuminates a first side of the projector frame through a first region of the outer lens; and A second infrared emitting element is disposed inside the projector frame, and illuminates the projector frame onto a second side opposite to the first side through the second region of the outer lens. The second region of the outer lens is located on the second side compared to the first region of the outer lens. The second infrared emitting element is positioned closer to the first side than the first infrared emitting element.

19. The vehicle-mounted infrared projector according to claim 1 or 18, characterized in that, The vehicle-mounted infrared projector has the following features: Wiring board, which is equipped with infrared light-emitting element; A flexible wire, used to connect the wiring board to the outside; and A flexible wire holding section, which is part of a metal heat dissipation component supporting the wiring substrate, is disposed on the outside of the projector frame and is covered by a pad formed of resin material. The heat dissipation component is combined with the outer lens by being sandwiched into the pad, thereby accommodating the wiring board.

20. The vehicle-mounted infrared projector according to claim 1 or 18, characterized in that, The vehicle-mounted infrared projector includes a protective component made of resin material, which is sandwiched between the edge of the opening of the housing and the outer periphery of the outer lens. Inside the housing, a recess formed on the outer periphery of the outer lens, edged by the protective member, is provided. The protective element has a drainage channel connecting the recess to the outer region of the recess.

21. A vehicle peripheral detection device, characterized in that, The vehicle peripheral detection device includes: The vehicle-mounted infrared projector according to any one of claims 1 to 20; and A camera, which is mounted on the vehicle to capture images of the area surrounding the vehicle illuminated by the vehicle-mounted infrared projector, is at least sensitive to infrared light.

22. A vehicle lamp, characterized in that, The vehicle lighting fixtures include: The vehicle-mounted infrared projector according to any one of claims 1 to 20; A wiring board, which is equipped with light-emitting elements; A flexible wire, used to connect the wiring board to the outside; and A flexible wire holding section, which is part of a metal heat dissipation component supporting the wiring substrate, is disposed on the outside of the projector frame and is covered by a pad formed of resin material. The heat dissipation component is combined with the outer lens by being sandwiched into the pad, thereby accommodating the wiring board.

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