JP2013095195A - Instrument for camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm whether or not a face position is settled within an angle of view even in the case where a crew member of a vehicle is moved within a required range when adjusting a mounting direction of a camera device.SOLUTION: A guide line 40 indicating an angle-of-view corresponding range 50 corresponding to an angle of view of a camera device 20 is drawn on the front side of a convex mirror 31. On the rear side of the convex mirror 31, a rear-side structure 32 is provided which includes a recess that is formed corresponding to the shape of a casing 21 of the camera device 20. An instrument 30 for the camera device comprised of the convex mirror 31 and the rear-side structure 32 is mounted in the camera device 20 while fitting the recess of the rear-side structure 32 to a front face 211 of the casing 21. At such a time, the angle-of-view corresponding range 50 is disposed with no inclination to a lens surface 221 at a position in front of a camera lens 22. Thus, a current imaging area of the camera device 20 can be projected on the angle-of-view corresponding range 50. The user confirms whether or not user's own face is settled within the angle-of-view corresponding range 50.

Description

  The present invention relates to an apparatus for a camera device that is used when adjusting the mounting direction of a camera device that captures the face of a vehicle occupant.

  2. Description of the Related Art Conventionally, a system is known in which a driver (occupant) face of a vehicle is photographed with a camera device, and a driver's blink or face direction is detected based on the photographed image. In the system, the mounting direction of the camera device needs to be adjusted so that the face of the occupant as the subject is within the shooting angle of view of the camera device. No special adjustment is required when the vehicle is equipped with a mounting structure that takes into account the appropriate mounting direction of the camera device, such as when standard equipment is installed in the vehicle. When the camera device is attached to a place, it is necessary to adjust the attachment direction of the camera device at the time of attachment.

  As a technique related to the adjustment of the mounting direction of the camera device, a technique for matching the subject to the optical axis of the camera device has been proposed (see, for example, Patent Documents 1 and 2). For example, in the camera device disclosed in Patent Document 1, a through hole having a central axis parallel to the optical axis of a lens (camera device) is formed in a housing of the camera device. According to this, the driver can make the optical axis coincide with the position of the driver's own eyeball or eyelid by adjusting the position of the camera device so that the scenery beyond the through hole can be seen. It is said.

  Further, Patent Document 2 discloses that a convex mirror is placed anywhere on the lens mounting surface of a camera so that the camera photographer can visually confirm the composition of the subject and another subject when photographing the subject. Is described. If the technique of this patent document 2 is applied, the face position can be made to substantially coincide with the optical axis of the camera device by adjusting the mounting direction of the camera device so that the occupant's face is reflected on the convex mirror.

JP 2008-24085 A Registered Utility Model No. 3146939

  By the way, the position of the face of the vehicle occupant may fluctuate during driving. Specifically, for example, a large vehicle such as a truck or a bus has a large handle, and therefore the driver may move his / her face with the movement of the hand when turning the handle. In such a case, even when the occupant's face is within the angle of view of the camera device when the camera device is attached, the occupant's face may be out of the angle of view when the actual camera device is used. . Thus, when the camera device is attached to the vehicle, it is necessary to adjust the attachment direction of the camera device in anticipation of changes in the face position (driving operation of the driver) when the camera device is used.

  In this regard, in the technique of Patent Document 1, when the face is located in front of the optical axis of the camera device, it can be visually confirmed that the face is within the angle of view. When the face position fluctuates within a necessary range, such as when it fluctuates, it cannot be confirmed whether or not the face falls within the angle of view. That is, with the technique of Patent Document 1, it is possible to adjust the optical axis under static conditions, but it is not possible to confirm whether the mounting direction of the camera device is properly adjusted under dynamic conditions that occur in practice. Similarly, the technique of Patent Document 2 cannot confirm whether or not the face is within the angle of view when the face position deviates from the mirror surface of the convex mirror and the face position fluctuates within a necessary range.

  The present invention has been made in view of the above circumstances, and can adjust whether or not the face position is within the angle of view even when the occupant of the vehicle fluctuates within a necessary range when adjusting the mounting direction of the camera device. An object is to provide an appliance.

In order to solve the above-mentioned problems, the present invention is a camera device instrument for use in adjusting the mounting direction of a camera device for photographing the face of a vehicle occupant,
A mirror having a guide line indicating a range corresponding to the angle of view corresponding to the angle of view of the camera device displayed on the surface;
The camera device is attachable to the camera device so that the mirror is arranged at an appropriate arrangement position where an area within the angle of view of the camera device in the current mounting direction is reflected in the range corresponding to the angle of view of the mirror. It can be removed from.

  According to this, by attaching the camera device instrument of the present invention to the camera device so that the mirror is disposed at an appropriate arrangement position, the field angle equivalent range indicated by the guide line displayed on the surface of the mirror is obtained. The area within the angle of view of the camera device in the current mounting direction can be copied. Therefore, whether the user who adjusts the mounting direction of the camera device (the occupant himself or a store clerk at the car equipment store or the like who mounts the camera device on the vehicle) becomes a subject, and the user's face is reflected in the range corresponding to the angle of view. That is, it can be confirmed whether or not the angle of view is within the angle of view of the camera device. Further, the user can perform an operation when using the actual camera device, so that even if the face position fluctuates due to the operation, whether or not the face is out of the range corresponding to the angle of view, that is, the camera device It can be easily confirmed whether or not the angle of view does not deviate. And the attachment direction of a camera apparatus can be made appropriate by adjusting the attachment direction of a camera apparatus so that a face may not remove | deviate from the field angle equivalent range of a mirror. In addition, since the camera device instrument of the present invention is removable from the camera device, the camera device can be used for actual photographing applications by removing the camera device instrument after adjusting the mounting direction of the camera device. Can be used.

  The mirror in the present invention is a convex mirror. According to this, since the size of the range corresponding to the angle of view displayed on the surface of the convex mirror can be reduced from the size of the actual angle of view (imaging area), the camera apparatus tool (convex mirror) can be easily handled.

  In the present invention, the range corresponding to the angle of view is displayed on the surface of the convex mirror so that the center of the range corresponding to the angle of view is centered on the surface of the surface of the convex mirror. The optical axis of the apparatus and the central axis of the convex mirror are coaxial. As a result, when the mirror is arranged at an appropriate arrangement position, an area within the angle of view of the camera device in the current attachment direction can be accurately copied in the range equivalent to the angle of view.

  In the present invention, the proper arrangement position is a position where the range corresponding to the angle of view is arranged in a state where there is no inclination with respect to the lens surface of the camera lens in front of the camera lens of the camera device. Features. According to this, the position and orientation of the camera lens (tilt with respect to the lens surface) can be considered as the position and orientation of the optical axis of the camera device. Therefore, the angle of view equivalent range can be easily aligned with the optical axis of the camera device by arranging the angle of view equivalent range in front of the camera lens without tilting the lens surface. As a result, the area within the angle of view of the camera device in the current mounting direction can be copied in the range equivalent to the angle of view.

  In the present invention, the guide line includes a horizontal guide line corresponding to a horizontal field angle of the camera device and a vertical guide line corresponding to a vertical field angle of the camera device, and the proper arrangement position is the horizontal guide line. The line is arranged in a horizontal direction, and the vertical guide line is a position arranged in the vertical direction. Thus, when the camera device fixture is mounted on the camera device, the range corresponding to the angle of view of the mirror can be made to accurately correspond to the angle of view (horizontal angle of view and vertical angle of view) of the camera device.

  In the present invention, the range corresponding to the angle of view is a range corresponding to a surface determined by a distance between the camera device and the occupant's face and an angle of view of the camera device.

  The ease of fitting the occupant's face within the angle of view varies depending on the distance between the camera device and the occupant's face. Specifically, as the distance between the camera device and the occupant's face increases, the angle of view at the position of the occupant's face (the surface determined by the distance between the camera device and the occupant's face and the angle of view of the camera device) increases. Therefore, the face is easy to fit within the angle of view. In other words, the larger the distance between the camera device and the occupant's face, the smaller the face appears in the captured image, and thus the face is more likely to fit within the angle of view (captured image). According to the present invention, since the range corresponding to the angle of view is a range corresponding to a surface determined by the distance between the camera device and the occupant's face and the angle of view of the camera device, whether or not the face is within the angle of view is accurately determined. it can.

  In the present invention, a plurality of the guide lines for each distance, in which the range corresponding to the angle of view increases as the distance increases, are displayed on the surface of the mirror.

  The distance between the camera device and the occupant's face may vary depending on the type of vehicle to which the camera device is attached and where the camera device is attached. According to the present invention, since a plurality of guide lines for each distance between the camera device and the occupant's face are displayed on the mirror, the face is within the angle of view by using the guide lines corresponding to the current distance. It can be accurately determined whether or not it fits.

  In the present invention, the instrument for a camera device can be attached to the camera device by adhesion with an adhesive member. Accordingly, the camera device tool can be easily attached to the camera device, and the camera device tool can be detached from the camera device.

  Moreover, in this invention, the reinforcing member which reinforces the said mirror provided in the back surface of the said mirror is provided. According to this, since the mirror can be reinforced, even if the mirror is formed of a material having low strength, the insufficient strength of the mirror can be solved.

  In the present invention, the instrument for a camera device can be attached to the camera device via the reinforcing member, and the reinforcing member is made of foamed resin. According to this, since the foamed resin has a certain degree of hardness, the mirror can be effectively reinforced. Further, since the foamed resin is not too hard and is light, it is possible to prevent the camera device from being damaged when the camera device is mounted on the camera device via the foamed resin.

  Further, in the present invention, a guide portion is provided on the back surface of the mirror, and guides the mounting position of the camera device instrument to the camera device so that the mirror is disposed at the proper placement position. And Thus, the camera device tool can be easily mounted on the camera device so that the mirror is arranged at the proper arrangement position.

  In the present invention, the guide portion may include a latching portion that latches on a housing of the camera device in a state where the mirror is disposed at the proper arrangement position. According to this, the mirror can be easily arranged at the proper arrangement position by attaching the instrument for the camera device to the camera device at the position where the latching portion is latched on the housing of the camera device.

  In the present invention, the guide portion includes a back side guide wire for alignment with a predetermined reference position of the camera device, and the reference position and the back side guide line are aligned with each other. A mirror is arranged at the proper arrangement position. According to this, the mirror can be easily arranged at the proper arrangement position by aligning the back surface side guide line with the reference position of the camera device.

FIG. 4 is a perspective view of the camera device 20 and a view angle 70 of the camera device 20. It is the figure which showed the structure of the instrument 30 for camera apparatuses. It is a figure explaining the attachment position of the camera apparatus. It is a figure explaining the mounting method and mounting position to the camera apparatus 20 of the instrument 30 for camera apparatuses. FIG. 6 is a diagram showing a state where a user's face 105 is reflected on a convex mirror 31. It is the figure which showed the modification of the back side structure provided in a back surface in a convex mirror. It is the figure which showed another modification of the back side structure provided in a back surface in a convex mirror.

  Hereinafter, an embodiment of the instrument for a camera device according to the present invention will be described. First, a camera device to be mounted with a camera device instrument will be described. FIG. 1 shows a perspective view of the camera device 20 and an angle of view 70 of the camera device 20. The camera device 20 is a camera that captures the face of the driver of the vehicle, and includes a housing 21, a camera lens 22 disposed in the center of the front surface 211 of the housing 21, and a camera lens 22 housed in the housing 21. And an image pickup device (not shown) such as a CCD sensor for converting the image of the subject formed by the method into image data. The camera device 20 captures an imaging region 71 within an angle of view 70 determined by characteristics of the camera lens 22 and the image sensor (such as the focal length of the camera lens 22 and the dimensions of the image sensor (imaging surface)). In addition, the housing | casing 21 of this embodiment is a rectangular parallelepiped shape (a horizontally long rectangle shape in front view) whose one side is about several centimeters.

  On the front surface 211 of the housing 21, a near infrared LED 23 that irradiates the imaging region 71 with near infrared light is provided. The near-infrared LED 23 enables the camera device 20 to shoot even when the surroundings are dark, such as at night. In addition, the housing 21 accommodates a control unit (not shown) that controls exposure by performing exposure control or controlling light emission of the near-infrared LED 23. In addition to shooting control, the control unit also detects a face area from the shot image, and performs a process of determining the driver's face orientation, the driver's blink, and the like based on the face area. And a control part performs the process (warning etc.) according to determination results, such as face direction and blink.

  Next, the camera device instrument of the present invention will be described. FIG. 2 is a diagram showing the structure of the camera device instrument 30. Specifically, FIG. 2A shows the camera device instrument 30 as viewed obliquely from the front, and FIG. Fig. 2C shows a front view of the camera device tool 30, and Fig. 2C shows a view of the camera device tool 30 viewed obliquely from the rear. The camera device instrument 30 includes a convex mirror 31 and a back-side structure 32 provided on the back surface of the convex mirror 31.

  The convex mirror 31 is a reflection in which a substrate 312 formed of resin (ABS resin, etc.), resin film, paper, glass, metal, etc., and the entire surface area of the substrate 312 are coated in a film form by vapor deposition, printing or plating. Part 311. The reflecting portion 311 is formed of a reflective material (aluminum, silver, etc.) that reflects light. The convex mirror 31 has a thin plate shape. Further, when the convex mirror 31 is viewed from the front, it has a rectangular shape (see FIG. 2B). The surface 313 (mirror surface, reflecting portion 311) of the convex mirror 31 has a convex curved surface symmetrical about the central axis 315 (see FIG. 2A) of the convex mirror 31. The central axis 315 is a straight line in the normal direction of the surface 313 at the center 314 of the surface 313. Therefore, the subject located in front of the convex mirror 31 is reduced and displayed on the surface 313 of the convex mirror 31. In addition, the degree of the convex curved surface of the convex mirror 31 is set so that the area 71 within the angle of view 70 of the camera device 20 can be copied in the range corresponding to the angle of view 50 described later.

  The size of the convex mirror 31 (the area of the surface 313) is slightly larger than the front surface 211 of the camera device 20 (housing 21) (for example, a size equivalent to a business card size). Specifically, the horizontal length of the convex mirror 31 (the length of the upper and lower lines 316 (see FIG. 2B) of the outer peripheral line of the convex mirror 31) is the horizontal length of the camera device 20 (front surface 211). Is a little longer than the upper and lower lines 212 (see FIG. 1). Similarly, the vertical length of the convex mirror 31 (the length of the left and right lines 317 (see FIG. 2B) of the outer peripheral line of the convex mirror 31) is the vertical length of the camera device 20 (the length of the front surface 211). It is slightly longer than the length of the left and right lines 213 (see FIG. 1)). The convex mirror 31 may have any shape and size as long as the user can confirm the subject reflected in the convex mirror. For example, the convex mirror 31 may have a square shape, a circular shape, or an elliptical shape when viewed from the front.

  As shown in FIG. 2B, a substantially rectangular guide line 40 is drawn on the surface 313 of the convex mirror 31 with ink or the like. Actually, the guide line 40 has a shape in which the rectangular shape is distorted according to the degree of the convex curved surface of the surface 313. The guide line 40 includes three guide lines 41 to 43. The guide lines 41 to 43 are different in size (similar) from each other, and the second guide line 42 is drawn inside the first guide line 41. A third guide line 43 is drawn on the inside. The center of the first range 51 surrounded by the first guide line 41, the center of the second range 52 surrounded by the second guide line 42, and the third surrounded by the third guide line 43. The centers of the range 53 coincide with each other. Further, the centers of the ranges 51 to 53 are located at the center 314 of the surface 313.

  The guide lines 40 (guide lines 41 to 43) are lines indicating a range corresponding to an angle of view corresponding to the angle of view 70 (see FIG. 1) of the camera device 20. That is, a range 50 (ranges 51 to 53) surrounded by the guide line 40 is a view angle equivalent range. The angle of view equivalent range 50 is strictly a range corresponding to the imaging region 71 (see FIG. 1) within the angle of view 70, and more strictly, the distance from the camera device 20 is within the angle of view 70 at a specific distance. The range corresponds to the surface. Specifically, the first view angle equivalent range 51 is set to a range in which the distance from the camera device 20 corresponds to a surface 701 (see FIG. 1) in the view angle 70 at d1. More specifically, the first view angle equivalent range 51 includes two horizontal guide lines 41 a corresponding to the horizontal view angle of the camera device 20 and two vertical guide lines 41 b corresponding to the vertical view angle of the camera device 20. being surrounded. The horizontal guide line 41a is set to a length corresponding to the horizontal width a1 (see FIG. 1) of the surface 701, and the vertical guide line 41b is set to a length corresponding to the vertical width a2 of the surface 701. The two horizontal guide lines 41a face each other and are drawn substantially parallel to the upper and lower lines 316 of the outer peripheral line of the convex mirror 31. The two vertical guide lines 41 b face each other and are drawn substantially parallel to the left and right lines 317 of the outer peripheral line of the convex mirror 31.

  The second view angle equivalent range 52 is set to a range in which the distance from the camera device 20 corresponds to a surface 702 (see FIG. 1) in the view angle 70 at d2. Similarly to the first field angle equivalent range 51, the second field angle equivalent range 52 includes two horizontal guide lines 42a (length corresponding to the horizontal width of the surface 702) corresponding to the horizontal field angle of the camera device 20. The range is surrounded by two vertical guide lines 42 b (length corresponding to the vertical width of the surface 702) corresponding to the vertical angle of view of the camera device 20. The two horizontal guide lines 42 a face each other and are drawn substantially parallel to the upper and lower lines 316 of the outer peripheral line of the convex mirror 31. The two vertical guide lines 42 b face each other and are drawn substantially parallel to the left and right lines 317 of the outer peripheral line of the convex mirror 31.

  The third view angle equivalent range 53 is set to a range in which the distance from the camera device 20 corresponds to a surface 703 (see FIG. 1) in the view angle 70 at d3. The third view angle equivalent range 53 also corresponds to two horizontal guide lines 43a (length corresponding to the horizontal width of the surface 703) corresponding to the horizontal view angle of the camera device 20 and 2 corresponding to the vertical view angle of the camera device 20. The range is surrounded by two vertical guide lines 43b (a length corresponding to the vertical width of the surface 703). The two horizontal guide lines 43a face each other and are drawn substantially parallel to the upper and lower lines 316 of the outer peripheral line of the convex mirror 31. The two vertical guide lines 43 b face each other and are drawn substantially parallel to the left and right lines 317 of the outer peripheral line of the convex mirror 31.

  Note that even if the face is within the angle of view 70 of the camera device 20, if the face position is a marginal position of the angle of view 70, detection of the face area from the captured image may fail. Therefore, each of the view angle equivalent ranges 51 to 53 may be set to a range excluding the position where the view angle 70 is at the limit. Specifically, each of the view angle equivalent ranges 51 to 53 may be set to a range corresponding to a surface in which the surfaces 701 to 703 are somewhat reduced (for example, a surface in which the surfaces 701 to 703 are reduced by about 20%).

  The relationship between the distances d1, d2, and d3 is d1> d2> d3. The distances d1, d2, and d3 indicate assumed distances between the camera device 20 and the subject (driver's face). The distance d1 is 1 m, the distance d2 is 80 cm, and the distance d3 is 60 cm, for example. Yes. Therefore, the first guide line 41 is a guide line used when the distance range between the camera device 20 and the subject (driver's face) is large. The second guide line 42 is a guide line used when the distance range is intermediate. The third guide line 43 is a guide line used when the distance range is small. When d1 = 1 m, the size of the surface 701 is, for example, about 80 cm wide × 60 cm long.

  As shown in FIGS. 2A and 2C, a back side structure 32 is attached to the back surface of the base material 312 of the convex mirror 31 with an adhesive or the like. The outer structure 32 has a rectangular parallelepiped shape having the same horizontal width and the same vertical width as the convex mirror 31 and having a constant width in the depth direction. The back side structure 32 is formed of a foamed resin such as polystyrene foam. As shown in FIG. 2C, a recess 322 that is recessed in a rectangular parallelepiped shape is formed on the back surface 321 of the back-side structure 32. The upper and lower side surfaces 324 of the concave portion 322 and the horizontal guide lines 41a to 43a drawn on the convex mirror 31 are in a parallel positional relationship (not in a twisted positional relationship). The left and right side surfaces 325 of the recess 322 and the vertical guide lines 41b to 43b are in a parallel positional relationship (not in a twisted positional relationship). Further, the center axis 315 of the convex mirror 31 intersects the center 326 of the bottom surface 323 of the recess 322.

  The size of the recess 322 is the same as the horizontal and vertical widths of the housing 21 of the camera device 20. That is, the lateral width b1 of the recess 322 is the same as the length of the upper and lower lines 212 (see FIG. 1) of the outer peripheral line of the front surface 211 of the housing 21. The vertical width b <b> 2 of the recess 322 is the same as the length of the left and right lines 213 (see FIG. 1) of the outer peripheral line of the front surface 211 of the housing 21. Further, the depth b3 of the recess 322 is smaller than the width of the housing 21 in the depth direction.

  The bottom surface 323 of the recess 322 may be configured by the back side structure 32 itself or may be configured by the back surface of the base material 312 of the convex mirror 31. An adhesive member 33 such as an adhesive tape is provided in a part of the bottom surface 323 (for example, a region near the outer periphery of the bottom surface 323). The adhesive member 33 includes a protective sheet that protects the adhesive surface of the adhesive member 33, and the adhesive surface is not exposed by the protective sheet when the camera device tool 30 is not used. The adhesive member 33 may be provided on the side surfaces 324 and 325. Further, the adhesive member 33 may not be provided in the recess 322 in advance, and may be provided in the recess 322 or an appropriate position when the camera device tool 30 is used.

  Below, although the usage method of the instrument 30 for camera apparatuses is demonstrated, the attachment position of the camera apparatus 20 is demonstrated first before the description. Here, FIG. 3 is a diagram for explaining the mounting position of the camera device 20, and specifically, FIG. 3A is a view of the vehicle interior 101 of the vehicle 100 in which the camera device 20 is mounted as viewed from the side. FIG. 3B shows a view of the passenger compartment 101 as viewed from above. In the example of FIG. 3, a large vehicle (truck) is shown as the vehicle 100. As shown in FIG. 3A, a driver's seat 102 on which a driver sits is provided in the passenger compartment 101, and a handle 201 and a dashboard 103 are provided in front of the driver's seat 102. The camera device 20 is mounted on, for example, the dashboard 103 in order to photograph the driver's face f. In the example of FIG. 3, the camera device 20 is attached diagonally forward of the driver so that the driver's visual field is not obstructed by the camera device 20 (see FIG. 3B). The camera device 20 can be attached to an arbitrary place such as an aftermarket product.

  In the example of FIG. 3, the camera device 20 is attached to the dashboard 103 so as to be supported by the support portion 23. The lower part of the support part 23 is fixed on the dashboard 103 with an adhesive seal or the like. Between the camera device 20 and the support portion 23, a direction variable mechanism 24 (see FIG. 3A) that changes the mounting direction of the camera device 20 up and down and left and right is provided. Therefore, the orientation of the camera device 20 can be manually changed in the vertical direction D1 (see FIG. 3A) and the horizontal direction D2 (see FIG. 3B). As the direction variable mechanism 24, a known mechanism that can be used to change the mounting direction, which is adopted in portable navigation or the like, can be used.

  The camera device 20 needs to be mounted so that the driver's face f is within the angle of view 70. That is, the vertical direction D1 of the camera device 20 is adjusted so that the face f is within the vertical angle of view 72 (see FIG. 3A) of the camera device 20, and the horizontal direction D2 of the camera device 20 is adjusted. Thus, it is necessary to make the face f fall within the horizontal angle of view 73 (see FIG. 3B) of the camera device. Further, since the face f may fluctuate with the driving operation (steering operation, etc.) of the driver, the mounting direction of the camera device 20 needs to be adjusted in anticipation of the fluctuation of the face f.

  The camera apparatus tool 30 is used in a form that is attached to the camera apparatus 20 when adjusting the mounting direction of the camera apparatus 20. Here, FIG. 4 is a diagram for explaining a mounting method and a mounting position of the camera device tool 30 to the camera device 20, and FIG. 4A illustrates the camera device 20 and the camera device tool 30 in the middle of the mounting. FIG. 4B shows the state of the camera device 20 and the camera device tool 30 after being mounted. In FIG. 4, only one guide line 40 is illustrated, and the remaining guide lines are not illustrated. The camera device tool 30 is attached to the camera device 20 so as to cover the front surface 211 of the camera device 20. Specifically, a part from the front surface 211 of the housing 21 of the camera device 20 is fitted into the recess 322 (see FIG. 2C) of the camera device instrument 30. At this time, the side surface 214 of the housing 21 (the top surface, the left surface, the right surface, and the bottom surface of the housing 21) and the side surfaces 324 and 325 (see FIG. 2C) of the recess 322 come into contact with each other. 30 is hooked (the camera device tool 30 is positioned). Further, the bottom surface 323 and the front surface 211 of the housing 21 can be fixed by the adhesive member 33 provided on the bottom surface 323 of the recess 322. That is, the camera device tool 30 is prevented from being inadvertently detached from the camera device 20. In addition, the adhesive member 33 is not provided in the part which the camera lens 22 and near-infrared LED23 contact. Therefore, strictly speaking, a part of the bottom surface 323 of the recess 322 (for example, a portion near the outer periphery of the bottom surface 323) and a part of the front surface 211 (for example, a portion near the outer periphery of the front surface 211) are fixed by the adhesive member 33. The

  Moreover, the convex mirror 31 is arrange | positioned so that the optical axis 25 of the camera apparatus 20 and the center axis | shaft 315 of the convex mirror 31 may become coaxial because the recessed part 322 is comprised as mentioned above. In other words, the field angle equivalent range 50 of the convex mirror 31 is oriented in the shooting direction of the camera device 20 and is disposed in front of the camera lens 22 with no inclination with respect to the lens surface 221. Strictly speaking, the center 314 of the field angle equivalent range 50 is disposed at a position in front of the camera lens 22 (center of the lens surface 221). Further, the horizontal guide lines 41a to 43a are arranged in the same horizontal direction as the horizontal angle of view 73 (see FIG. 3B), and the vertical guide lines 41b to 43b are vertical angle of view 72 (see FIG. 3A). It is arranged in the same vertical direction as the direction of. As a result, the current shooting area 74 (see FIG. 3) within the angle of view 70 of the camera device 20 in the current attachment direction can be captured in the range 50 equivalent to the angle of view.

  After mounting the camera device appliance 30 to the camera device 20 as described above, a user (a dealer to which the camera device 20 is attached, a clerk of a car supply store, or the driver himself) sits on the driver's seat 102 and has a convex mirror. The mounting direction of the camera device 20 is adjusted on the basis of the position of its own face shown in FIG. At this time, the user approximates the distance between the camera device 20 and the face in advance, and uses the guide lines 41 to 43 corresponding to the distance. Specifically, for example, when the distance between the camera device 20 and the face is about 1 m, the user uses the first guide line 41 indicating the largest field angle equivalent range 51, and the distance is If the distance is about 60 cm, the second guide line 42 showing the intermediate-view angle equivalent range 52 is used. If the distance is about 60 cm, the smallest view-angle equivalent range 53 is shown. 3 guide lines 43 are used. In addition, what guideline 41 to 43 should be used when the distance between the camera device 20 and the face may be described in, for example, an instruction manual for the camera device tool 30.

  Here, FIG. 5 shows a state where the convex mirror 31 shows the face 105 of the user who adjusts the mounting direction of the camera device 20. In FIG. 5, assuming that the first guide line 41 is used, the first guide line 41 is illustrated, and the other guide lines 42 and 43 are not illustrated. In FIG. 5, the display of subjects other than the face 105 is omitted. As a procedure for adjusting the mounting direction of the camera device 20, for example, the mounting direction of the camera device 20 is such that the face 105 appears in the vicinity of the center 314 of the angle-of-view-equivalent range 51 when the vehicle is first stopped and an appropriate driving position is taken. Adjust. Thereafter, the user performs an operation simulating actual driving (or performing actual driving), and visually checks whether the face 105 does not deviate from the view angle equivalent range 51 even if the face position fluctuates. When the face 105 deviates from the angle of view equivalent range 51 (even when part of the face 105 deviates), fine adjustment of the mounting direction of the camera device 20 is performed again, and an operation simulating actual driving is performed again. Is not deviated from the angle of view equivalent range 51. The above procedure is repeated until the face 105 does not deviate from the view angle equivalent range 51. As a result, the driver's face can be kept within the angle of view 70 even when the driving posture changes with the driving operation. That is, the mounting direction of the camera device 20 can be made appropriate.

  The camera device tool 30 is used when adjusting the mounting direction of the camera device 20, and is removed when the camera device 20 is used for actual photographing. When the user finishes adjusting the mounting direction of the camera device 20, the camera device tool 30 is removed from the camera device 20 by pulling the camera device tool 30 forward with a force larger than the adhesive force of the adhesive member 33. be able to. Thus, the camera device 20 can be used for actual photographing applications.

  As described above, in the present embodiment, when the camera device 20 is attached or actually operated, the camera device tool 30 is attached to the camera device 20 so that there is no dedicated facility (dealer or car supply store). However, the mounting direction of the camera device 20 can be easily made appropriate. Moreover, since the adhesive member 33 is provided in the camera apparatus tool 30, the camera apparatus tool 30 can be easily fixed to the camera apparatus 20 and can be detached from the camera apparatus 20. Further, since the camera device tool 30 is formed with the back side structure 32 having a recess 322 shaped to fit the housing 21 of the camera device 20, the camera device tool 30 can be easily attached appropriately. Can be positioned. Further, the convex mirror 31 can be reinforced by the back side structure 32. Therefore, the base material 312 of the convex mirror 31 can be simply configured with a weak member (such as paper). Moreover, since the back side structure 32 is formed of foamed resin, it is possible to prevent the camera device 20 from being damaged when the camera device tool 30 is attached to the camera device 20.

  In addition, since a plurality of guide lines 41 to 43 are drawn on the convex mirror 31, various conditions (different vehicle types, different mounting positions even for the same vehicle type) that make the distance between the camera device 20 and the face different. Even when the camera device 20 is mounted, the mounting direction of the camera device 20 can be made appropriate.

  The camera device instrument of the present invention is not limited to the above embodiment, and can be variously modified without departing from the scope of the claims. For example, the back-side structure provided on the back surface of the convex mirror may have any shape as long as the convex mirror can be positioned at an appropriate mounting position, for example, the shape shown in FIG. FIG. 6 is a view for explaining a modified example of the back-side structure, FIG. 6 (A) is a view of the camera device tool 30 as viewed obliquely from the rear, and FIG. 6 (B) is a camera device tool. 30 shows a state in which 30 is mounted on the camera device 20. In FIG. 6, configurations having the same names as those in the above embodiment are denoted by the same reference numerals.

  The back side structure 32 in FIG. 6 includes four convex portions 327 having an L-shaped cross section that protrudes rearward from the back surface 318 of the convex mirror 31. The convex portions 327 are provided at positions corresponding to the positions of the four corners of the front surface 211 of the camera device 20, that is, near the four corners of the rear surface 318 of the convex mirror 31. In addition, the convex part 327 can be comprised with foamed resin (foamed polystyrene etc.) similarly to the said embodiment. An adhesive member 33 is provided on the back surface 318 of the convex mirror 31. As shown in FIG. 6B, each convex portion 327 is just fitted into the casing 21 when the convex mirror 31 is disposed at the same predetermined mounting position as in the above embodiment. Specifically, the inner surface 327a of each convex portion 327 has four corners of the side surface 214 of the housing 21 (a portion where the upper surface and the left surface intersect, a portion where the upper surface and the right surface intersect, and a bottom surface and the left surface intersect). And a portion where the bottom surface and the right surface intersect). The convex mirror 31 and the housing 21 are fixed by the adhesive member 33. Thus, the convex mirror 31 can be easily positioned at an appropriate mounting position also by the back side structure 32 of FIG. Moreover, the back side structure 32 can be made compact compared with the back side structure 32 of FIG.

  Moreover, the shape shown in FIG. 7 may be sufficient as a back side structure. FIG. 7 is a diagram for explaining another modified example of the back side structure, and in detail, is a view of the camera device tool 30 as viewed obliquely from the rear. In FIG. 7, the same reference numerals are given to the components having the same names as those in the above embodiment. The back side structure 32 of FIG. 7 has a shape in which the concave portion 322 is not formed in the back side structure 32 of FIG. 2C, that is, a rectangular parallelepiped shape. On the back surface 321 of the back-side structure 32, a back-side guide line 328 is drawn with ink or the like at the same position as the concave portion 322 in FIG. The back-side guide line 328 has the same shape as the outer peripheral lines 212 and 213 (see FIG. 1) of the front surface 211 of the camera device 20. Further, an adhesive member 33 is provided inside the back side guide wire 328.

  When the camera device tool 30 of FIG. 7 is attached to the camera device 20, the back-side guide wire 328 is aligned with the positions of the outer peripheral lines 212 and 213 of the front surface 211. The convex mirror 31 is arranged at the same position (appropriate arrangement position) as in the above-described embodiment in a state where the positions of the back-side guide line 328 and the outer peripheral lines 212 and 213 are aligned. In this state, the convex mirror 31 and the casing 21 are fixed by the adhesive member 33. As described above, the rear side structure 32 of FIG. 7 can also be easily positioned so that the convex mirror 31 is arranged at the proper arrangement position. Further, the back side structure can be easily formed as compared with the back side structure 32 of FIGS. 2 and 6. Further, the convex mirror 31 can be reinforced more strongly than the back side structure 32 of FIGS. 7 may be omitted, and the positioning-side back guide wire 328 may be drawn directly on the back surface of the convex mirror 31. As a result, the structure of the camera device instrument can be simplified. The outer peripheral lines 212 and 213 correspond to the “predetermined reference position” in the present invention. Note that the back-side guide line may be a line that matches the position of the camera device 20 other than the outer peripheral lines 212 and 213 (for example, the position of the camera lens 22).

  In the above embodiment, an example is shown in which three guide lines are drawn on the convex mirror, but the number of guide lines is not limited to three. If the number of guide lines is more than three, it is possible to determine whether or not the face falls within the angle of view of the camera device under more various distance conditions (distance between the camera device and the face). A plurality of camera device tools may be provided, and one guide line having a different distance range may be drawn on each camera device tool. This makes it possible to determine whether or not the face falls within the angle of view of the camera device by using a camera device instrument having a guide line corresponding to the current distance, and only one guide line is drawn. This makes it easier to see the subject in the convex mirror.

  In the above embodiment, the back-side structure 32 corresponds to the “reinforcing member” of the present invention. The concave portion 322 and the convex portion 327 correspond to the “guide portion” and the “latching portion” of the present invention.

DESCRIPTION OF SYMBOLS 20 Camera apparatus 21 Case of camera apparatus 211 Front surface of housing 22 Camera lens 221 Lens surface 25 Optical axis of camera apparatus 30 Camera apparatus tool 31 Convex mirror 313 Surface of convex mirror 314 Center of convex mirror 315 Center axis of convex mirror 318 Back surface of convex mirror 32 Back side structure 322 Concave portion 327 Convex portion 328 Back side guide wire 33 Adhesive member 40, 41-43 Guide wire 41a, 42a, 43a Horizontal guide wire 41b, 42b, 43b Vertical guide wire 50, 51-53 Range corresponding to angle of view 70 Angle of view of camera device 71, 74 Area within angle of view 72 Vertical angle of view 73 Horizontal angle of view 701-703 Surface within angle of view 105 Face

Claims (13)

An apparatus for a camera device for use in adjusting a mounting direction of a camera device for photographing a face of a vehicle occupant,
A mirror having a guide line indicating a range corresponding to the angle of view corresponding to the angle of view of the camera device displayed on the surface;
The camera device is attachable to the camera device so that the mirror is arranged at an appropriate arrangement position where an area within the angle of view of the camera device in the current mounting direction is reflected in the range corresponding to the angle of view of the mirror. An apparatus for a camera device, which is removable from the camera.   The camera apparatus instrument according to claim 1, wherein the mirror is a convex mirror. The field angle equivalent range is displayed on the surface of the convex mirror so that the center of the field angle equivalent range is at the center of the surface of the convex mirror,
The apparatus for a camera device according to claim 2, wherein the proper arrangement position is a position where an optical axis of the camera device and a central axis of the convex mirror are coaxial.   2. The proper arrangement position is a position where the range corresponding to the angle of view is arranged in a state where there is no inclination with respect to the lens surface of the camera lens in front of the camera lens of the camera device. The instrument for camera devices of any one of -3. The guide line includes a horizontal guide line corresponding to a horizontal field angle of the camera device and a vertical guide line corresponding to a vertical field angle of the camera device,
5. The camera device instrument according to claim 3, wherein the proper arrangement position is a position where the horizontal guide line is arranged in a horizontal direction and the vertical guide line is arranged in a vertical direction.   The range corresponding to the angle of view is a range corresponding to a surface determined by a distance between the camera device and a face of an occupant and an angle of view of the camera device. Camera equipment.   The apparatus for a camera device according to claim 6, wherein a plurality of the guide lines for each of the distances in which the range corresponding to the angle of view increases as the distance increases are displayed on a surface of the mirror.   The instrument for a camera device according to any one of claims 1 to 7, wherein the instrument for a camera device can be attached to the camera device by adhesion with an adhesive member.   The camera device instrument according to any one of claims 1 to 8, further comprising a reinforcing member provided on a back surface of the mirror to reinforce the mirror. The instrument for the camera device can be attached to the camera device via the reinforcing member,
The camera device instrument according to claim 9, wherein the reinforcing member is formed of a foamed resin.   2. A guide portion provided on a back surface of the mirror, the guide portion guiding a mounting position of the camera device instrument to the camera device so that the mirror is arranged at the proper arrangement position. The instrument for a camera device according to any one of 10.   The camera device instrument according to claim 11, wherein the guide unit includes a latching unit that latches on a housing of the camera device in a state where the mirror is disposed at the proper arrangement position.   The guide portion includes a back-side guide line for alignment with a predetermined reference position of the camera device, and the mirror is in the proper arrangement position in a state where the reference position and the back-side guide line are aligned. The camera device instrument according to claim 11, wherein the camera device instrument is disposed on the camera device.

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