JP5899980B2 - Imaging device cover mounting structure - Google Patents

Description

  The present invention relates to a cover attachment structure for an imaging apparatus, and more particularly to a cover attachment structure for attaching a cover to a camera unit provided on a ceiling surface.

  Conventionally, various attachment structures are known as techniques for attaching a cover to an electronic device provided on a ceiling surface (see, for example, Patent Document 1).

  In the cover mounting structure disclosed in Patent Document 1, the antenna device housing hole (10) is formed in the ceiling board (1) (the numbers in parentheses indicate the reference numerals described in the Patent Document, the same applies hereinafter), The antenna part (6) is attached to the base (5). The base (5) is inclined and passed through the antenna device housing hole (10), and the base (5) is placed on the ceiling plate (1). Then, the cover (7) is aligned with the base (5) so as to cover the antenna portion (6) from below, and the cover (7) is fixed with screws (17).

  By the way, there is known an imaging apparatus in which a camera unit for imaging a room is provided on a ceiling surface and this camera unit is covered with a cover from below. The camera unit is composed of various precision electronic components such as a camera and a circuit board.

Japanese Patent Laid-Open No. 11-289170 (FIG. 1)

  When the cover mounting structure of Patent Document 1 is used for this type of imaging apparatus, the operator should be careful not to touch the camera or circuit board in addition to poor workability due to work at a high place. It is necessary to visually adjust the mounting position of the cover while paying the screw, or to screw the screw while supporting the cover with one hand, which is very troublesome.

  Therefore, the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a cover attachment structure for an imaging apparatus that can easily attach a cover to a camera unit provided on a ceiling surface.

The cover mounting structure of the imaging apparatus of the present invention is a cover mounting structure of an imaging apparatus in which a camera unit is provided on the ceiling surface, and a cover with a bottomed box shape is put on and fitted to the camera unit from below. When guiding the guide unit provided in the camera unit and the cover provided in the cover so that the camera unit is covered with the cover, the guide unit guides the cover to a proper mounting position. A guide unit; and an angle adjusting unit capable of rotatably supporting the camera unit and fixing the camera unit to the ceiling surface at a predetermined angular position. The angle adjusting unit is provided on the ceiling surface. An attachment plate to be attached; and an adjustment piece provided on the camera unit and fixed to the attachment plate at a predetermined angular position, and the adjustment piece Characterized in that to constitute a serial induction portion in the same part.

  According to the cover mounting structure of the image pickup apparatus of the present invention, the guide unit guides the cover to the proper mounting position only by covering the camera unit from below, so that the cover positioning becomes much easier, and the camera unit The cover can be easily attached.

It is a side view of the bus | bath by which the person detection apparatus concerning this embodiment is mounted. It is an enlarged view of the A section of FIG. 1, and is a front view of a human detection apparatus. It is a disassembled perspective view of a human detection apparatus. FIG. 4 is a bottom view of the camera unit, as viewed from the direction of arrow B in FIG. 3. It is C arrow directional view of FIG. 3, and is a top view of a cover. FIG. 3 is a bottom view of the human detection device, as viewed from arrow D in FIG. 2. It is the EE sectional view taken on the line of FIG. 6, and is a figure explaining the structure of a guide part. It is sectional drawing of an engaging part and a support plate. It is a perspective view of an insertion piece part and a holding hole part. FIG. 7 is a cross-sectional view taken along line FF in FIG. It is a figure explaining the structure of an angle adjustment means, (a) is an exploded view, (b) is a figure which shows the form which piled up the fixed piece part and the adjustment piece part. (A) is a figure explaining the attachment method of an attachment board, (b) is a figure explaining the attachment method of a camera unit. It is a figure explaining the effect | action of an angle adjustment means, (a) is a side view of the apparatus which faced the imaging direction vertically downward, (b) and (c) of the apparatus which inclined the imaging direction with respect to the vertical line It is a side view. It is a figure explaining the method of fitting a cover with a camera unit. It is a figure explaining the method to fix a cover to a camera unit.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

  The present embodiment is an example in which the cover mounting structure of the imaging apparatus of the present invention is applied to a human detection device, and FIG. 1 is a side view of a bus on which the human detection device is mounted.

  As shown in FIG. 1, the bus 10 includes a vehicle body 11, a front wheel 12 provided at a front lower portion of the vehicle body 11, and a rear wheel 13 provided at a rear lower portion of the vehicle body 11. A boarding port 15 is provided on the front side surface of the vehicle body 11, and an exit port 16 is provided on the side surface of the central portion of the vehicle body 11. Each of the entrance 15 and the exit 16 is provided with a front door 17 and an inner door 18 that open and close the entrance 15 and the exit 16.

  In the passenger compartment 21, a human detection device (imaging device) 30 is provided on the ceiling surface 22 in the vicinity of the entrance 15 and the exit 16. The person detection device 30 on the boarding gate 15 side measures the number of people getting on the bus 10, and the person detection device 30 on the boarding gate 16 side measures the number of people getting off the bus 10. The human detection device 30 is linked to a speech synthesizer (not shown) that guides the stop information by voice, and the measured data together with the stop information (for example, stop name and route system) sent from the speech synthesizer. Record.

  The data recorded in the human detection device 30 is a data collection terminal installed at a business office or the like by an arbitrary communication means (for example, a wireless LAN) at an arbitrary time (for example, after the bus operation ends). Sent to a machine (eg, a personal computer). The data collection terminal aggregates and processes the transmitted data using spreadsheet software, and displays the number of passengers at each stop, the number of passengers by route system, daily reports, monthly reports, annual reports, and the like. Such information about the number of passengers is used for optimizing the operation plan.

Next, the overall configuration of the human detection device 30 will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the human detection device 30 is attached to the ceiling surface 22, the camera unit 40 fixed to the mounting plate 31, and the camera unit 40 from below. And a cover 60. The mounting plate 31 has a base 33 fixed to the ceiling surface 22 with mounting screws 32. The base portion 33 extends along the vehicle front-rear direction, and a pair of fixed piece portions 35 that are bent downward are provided at both longitudinal ends of the base portion 33.

Next, the configuration of the camera unit 40 will be described with reference to FIG.
As shown in FIG. 4, the camera unit 40 includes a support plate 41 that faces the mounting plate 31 (see FIG. 3). The support plate 41 is a substantially rectangular metal plate. A bracket 42 is provided in the vicinity of the inside of each short side portion 41 a of the support plate 41.

  The bracket 42 includes a female screw hole 42a for screwing the cover 60 (see FIG. 3), an adjustment piece portion 42b that protrudes downward, and a guide portion 42c that protrudes laterally. The guiding portion 42c is a substantially U-shaped convex portion, and has a function of guiding the cover 60 (see FIG. 3) to a regular mounting position.

  In addition, a plurality of (here, two) holding hole portions 43 are provided in the vicinity of the inside of each long side portion 41 b of the support plate 41. The holding hole 43 is formed in, for example, a rectangular shape or an oval shape, and has a function of holding the upper edge of the cover 60 (see FIG. 3).

  A circuit board 45 is attached to the lower surface of the support plate 41 with an attachment screw 32. Another circuit board 46 is attached to the circuit board 45 with attachment screws 32, and a pair of cameras 47 constituting a stereo camera are mounted on the circuit board 46. In the camera unit 40, passengers are detected based on the distance image obtained from the pair of cameras 47, and the number of passengers is measured and recorded.

  Another circuit board 48 is provided below the circuit board 46. The circuit board 48 is supported by a board support member 51, and the board support member 51 is attached to the circuit board 46 with an attachment screw 32. The substrate support member 51 is provided with an attachment portion 51a located at the center of the support plate 41, and an abutment portion 51b protruding from the attachment portion 51a toward one side in the longitudinal direction of the support plate 41.

  The contact portion 51b is formed in a plate shape and has a function of regulating the mounting direction of the cover 60 (see FIG. 3). In the camera unit 40, a space 52 without components is provided at a position that is point-symmetric with the contact portion 51b and at the same height as the contact portion 51b with the center point C1 of the apparatus interposed therebetween.

Next, the configuration of the cover 60 will be described in detail with reference to FIGS.
As shown in FIG. 5, the cover 60 is a molded product formed into a bottomed box shape with a synthetic resin, and includes a substantially rectangular bottom portion 61 and a pair of long side surface portions 62 connected to the long side portion of the bottom portion 61. And a short side surface portion 63 connected to the short side portion of the bottom portion 61. The upper end opening of the cover 60 can be fitted to the support plate 41 (see FIG. 4). Further, since the cover 60 has a point-symmetric shape (in this case, a rectangular shape) with respect to the center point C1 of the apparatus in a plan view or a bottom view, the cover 60 is 2 with respect to the camera unit 40 (see FIG. 4). Has two mounting orientations. That is, the two attachment directions are directions that are inverted by 180 ° around the vertical axis. In the present embodiment, only one of the two mounting directions is set as a normal direction.

  The bottom 61 is provided with a pair of screw insertion holes 65, a pair of through holes 66, and a direction restricting portion 67. In addition, a guide portion 68 is provided inside each of the pair of short side surface portions 63. An engaging portion 71 is provided at the center of the upper end of each of the pair of long side surface portions 62. Further, a plurality of insertion piece portions 72 are provided on the inner surfaces of the pair of long side surface portions 62.

  The screw insertion hole 65 is provided in the vicinity of the short side surface portion 63. A mounting screw 32 (see FIG. 3) is inserted into the screw insertion hole 65 from below. The inserted mounting screw 32 (see FIG. 3) is screwed into the female screw hole 42a (see FIG. 4), and fastens the cover 60 to the bracket 42 (see FIG. 4).

  As shown in FIG. 6, the pair of through holes 66 are provided at positions facing the pair of cameras 47. Thereby, the camera 47 images the head of a person walking on the floor through the through hole 66.

  As shown in FIG. 7, the guide portion 68 is configured by a pair of protruding strip portions 68a that can be fitted to the guide portion 42c. The protruding line portion 68a extends along the vertical direction, and a leading portion 68b inclined inward is provided on the upper end surface of the protruding line portion 68a. When the cover 60 is put on the camera unit 40 (see FIG. 3) from below, the guide portion 68b guides the guide portion 42c between the pair of protruding strip portions 68a. Thereby, the cover 60 is first guided to a proper fitting position. Further, when the cover 60 is fitted to the camera unit 40 (see FIG. 3), the pair of protruding ridges 68a guide the cover 60 to the proper mounting position while being positioned by the guide portion 42c. Note that a stopper 73 may be provided on the bottom 61, and when the cover 60 is fitted to the proper mounting position, the stopper 73 and the guide portion 42c may be brought into contact with each other. By doing in this way, the cover 60 can be more accurately positioned at the regular attachment position.

  As shown in FIG. 8, the engaging portion 71 includes a protruding portion 71 a that protrudes upward from the upper edge portion of the long side surface portion 62, and a claw portion 71 b that is formed inward from the upper end of the protruding portion 71 a. . On the upper surface of the claw portion 71b, a taper portion 71c inclined downward inward is provided. The tapered portion 71 c functions to release the engaging portion 71 outward from the support plate 41 when the engaging portion 71 hits the lower surface of the support plate 41. When the cover 60 is fitted to the camera unit 40 (see FIG. 3), the engaging portion 71 configured in this way once escapes from the support plate 41 while being elastically deformed by the action of the tapered portion 71c, and then the elastic force Then, the upper surface of the support plate 41 is pressed by the claw portion 71b. Thereby, the cover 60 is temporarily fixed by engaging with the support plate 41.

  As shown in FIG. 9, the insertion piece 72 is constituted by a pair of ribs 72a. The pair of ribs 72 a is provided on the upper inner surface of the long side surface portion 62. The pair of ribs 72a protrude higher than the upper edge of the long side surface portion 62, and are inserted into the holding hole portion 43 when the cover 60 is fitted to the camera unit 40 (see FIG. 3). The holding hole 43 holds the pair of inserted ribs 72a. Thereby, the form of the cover 60 is maintained. For example, when the temperature of the passenger compartment increases as the temperature rises, the synthetic resin cover 60 is likely to undergo thermal deformation such as inward warping or outward warping or bulging. However, in this embodiment, since the holding hole 43 holds the pair of ribs 72a and maintains the form of the cover 60, the cover 60 can be prevented from being thermally deformed.

  As shown in FIG. 10, the direction restricting portion 67 extends in a rod shape upward from the upper surface of the bottom portion 61. The direction restricting portion 67 is inserted into the space 52 having no component in the regular mounting direction among the two mounting directions of the cover described above, and allows the cover 60 to be fitted. On the other hand, in the direction rotated by 180 ° around the vertical axis with respect to the normal mounting direction (if the mounting direction of the cover 60 is wrong), the direction restricting portion 67 does not contact the camera unit 40 as indicated by a two-dot chain line. The contact with the contact portion 51b prevents the cover 60 from fitting into the camera unit 40.

  Next, the structure of the angle adjusting means for adjusting the orientation of the camera unit 40 will be described with reference to FIG. As shown in FIG. 11A, the angle adjusting means 80 includes a fixed piece portion 35, an adjustment piece portion 42b, and rotating shafts 81L and 81R. The fixed piece portion 35 is provided with two left and right upper through holes 82L and 82R and two left and right lower through holes 83L and 83R at left and right symmetrical positions with respect to the vertical center axis C2. On the other hand, the adjustment piece portion 42b is provided with two left and right upper female screw holes 85L and 85R and two left and right lower female screw holes 86L and 86R at left and right symmetrical positions across the vertical center axis C2. Further, the rotation shafts 81L and 81R are constituted by male screw members such as screws. Further, an insertion hole 87 is formed in the support plate 41, and the fixed piece portion 35 is inserted into the insertion hole 87 from above, and then is moved to the adjustment piece portion 42b by two rotating shafts 81L and 81R. It is concluded.

  As shown in FIG. 11 (b), the angle adjusting means 80 has the imaging direction of the camera 47 (see FIG. 6) oriented vertically downward when the upper through holes 82L and 82R and the upper female screw holes 85L and 85R are aligned. Is set as follows. At this time, the lower through hole 83R on one side (right side here) with respect to the vertical center axis C2 is centered on the upper through hole 82L on the other side (left side here) with respect to the lower female screw hole 86R on one side. Is shifted inward by an angle θ (15 degrees in this example). The same applies to the lower through hole 83L on the other side (here, the left side) with respect to the vertical center axis C2, and the upper through hole 82R on one side (here, the right side) is formed with respect to the lower female screw hole 86L on the other side. The center is shifted from the inside of the angle θ.

  A method of attaching the human detection device 30 having the above configuration to the ceiling surface 22 (see FIG. 2) will be described with reference to FIGS. First, as shown in FIG. 12A, the worker attaches the attachment plate 31 to the ceiling surface 22 (see FIG. 2) with the attachment screw 32. Next, as shown in FIG. 12B, after the fixed piece portion 35 is inserted into the insertion hole 87 of the support plate 41, the fixed piece portion 35 and the adjustment piece portion 42b are overlapped and fastened by the rotation shafts 81L and 81R. Then, the camera unit 40 is fixed to the mounting plate 31.

  At this time, the angle adjustment means 80 allows the camera unit 40 to be attached with the angle adjusted as follows. That is, as shown in FIG. 13 (a), when there is no step on the floor, the upper through holes 82L and 82R (see FIG. 11 (a)) and the upper female screw holes 85L and 85R (see FIG. 11 (a)). And the two rotation shafts 81L and 81R are screwed into each. Thereby, the camera unit 40 is fixed to the ceiling surface 22 with the imaging direction of the camera 47 (direction indicated by the arrow (1)) directed vertically downward.

  On the other hand, when there is a step on the floor, for example, as shown in FIG. 13B, the upper through hole 82L (see FIG. 11A) and the upper female screw hole 85L (see FIG. 11A). And the lower through hole 83R (see FIG. 11 (a)) and the lower female screw hole 86R (see FIG. 11 (a)) are matched, and the rotation shafts 81L and 81R are screwed respectively. Then, the camera unit 40 is fixed to the mounting plate 31 in a state where the imaging direction of the camera 47 (the direction indicated by the arrow (2)) is inclined to the left by the angle θ. Although the angle θ is 15 degrees in this example, it can be set to an arbitrary size according to the size of the step, the number of steps, and the like.

  Further, as shown in FIG. 13C, when the imaging direction of the camera 47 (direction shown by the arrow (3)) is inclined to the right by an angle θ, the lower through hole 83L (see FIG. 11A) and the lower part The female screw holes 86L (see FIG. 11 (a)) are matched, and the upper through hole 82R (see FIG. 11 (a)) and the upper female screw hole 85R (see FIG. 11 (a)) are matched to each other. The moving shafts 81L and 81R are screwed. Note that whether the imaging direction of the camera 47 is tilted to the left or right side can be arbitrarily selected depending on the positional relationship between the human detection device 30 and the step.

  Thus, since the angular position of the camera unit 40 can be adjusted according to the presence or absence of a step on the floor surface, the imaging direction of the camera is directed substantially perpendicular to the moving direction of the head of a person walking on the floor surface. Can do. Thereby, a passenger can be detected with high accuracy irrespective of the presence or absence of a step on the floor surface.

  After fixing the camera unit 40 at an arbitrary angular position, as shown in FIG. 14, a cover 60 is attached so as to cover the camera unit 40 from below. When the cover 60 is attached, first, the cover 60 is directed to the normal attachment direction and lightly covered on the camera unit 40 from below. Then, the guide portion 42c is guided into the guide portion 68 so that the cover 60 is in a proper fitting position. At this regular fitting position, the cover 60 is pushed upward while the guiding portion 42 c is fitted into the guide portion 68, and the camera unit 40 is fitted. Then, at the same time as the insertion piece portion 72 is inserted into the holding hole portion 43, the engaging portion 71 engages with the support plate 41, and the cover 60 is temporarily fixed.

  Then, as shown in FIG. 15, the mounting screw 32 is passed through the screw insertion hole 65 (see FIG. 14) of the temporarily secured cover 60 and screwed into the female screw hole 42 a (see FIG. 14) of the bracket. (See FIG. 14). This completes the mounting operation of the cover 60.

  According to the cover mounting structure of the embodiment described above, the cover 60 is guided to the regular mounting position only by covering the camera unit 40 with the cover 60 from below. Thereby, alignment of the cover 60 becomes much easier, and the cover 60 can be easily attached to the camera unit 40. In addition, since the cover 60 is accurately fitted, there is no fear that the cover 60 comes into contact with precision electronic components such as the circuit board 45 and the camera 47.

  In addition, the direction restricting portion 67 can prevent the cover 60 from being erroneously inserted because the cover 60 cannot be fitted into the camera unit 40 unless the mounting direction is normal. Therefore, damage to the circuit board 45 and the like due to erroneous insertion of the cover 60 can be prevented.

  Furthermore, if the cover 60 is fitted to the camera unit 40, the cover 60 is temporarily fixed by the engaging portion 71, so that the operator can have both hands free. Therefore, the operator does not need to perform screwing while pressing the cover with one hand as in the prior art, and can easily perform screwing work using both hands.

  In addition, since the adjustment piece 42b, which is a component of the angle adjustment means 80, and the guide portion 42c are configured by the same component (bracket 42), the number of components can be reduced. Moreover, since the adjustment piece part 42b and the induction | guidance | derivation part 42c were comprised with the same components, even if it changes the angular position of the adjustment piece part 42b, the effect | action of the induction | guidance | derivation part 42c does not change. Therefore, the cover 60 can be easily attached to the camera unit 40 regardless of the angular position of the camera unit 40.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  For example, in the embodiment, the present invention is applied to a human detection device that detects a passenger on a bus. However, the cover mounting structure of the imaging device of the present invention can be set to various types of transportation or buildings other than buses. The present invention can also be applied to other imaging devices.

22 ... ceiling surface, 30 ... human detection device (imaging device), 31 ... mounting plate,
40 ... Camera unit, 41 ... Support plate, 42 ... Bracket (same part), 42b ... Adjustment piece part, 42c ... Induction part, 43 ... Holding hole part, -Cover, 67 ... Direction regulating part, 68 ... Guide part, 71 ... Engagement part, 72 ... Insert piece part, 80 ... Angle adjusting means.

Claims (1)

A camera unit is provided on the ceiling surface, and a cover mounting structure of the imaging apparatus is configured such that the camera unit is covered with a bottomed box-shaped cover from below, and is fitted.
A guiding portion provided in the camera unit;
A guide portion that is provided on the cover and can be fitted to the guide portion and covers the camera unit with the cover, and is guided by the guide portion to guide the cover to a proper mounting position ;
An angle adjusting means that rotatably supports the camera unit and can fix the camera unit to the ceiling surface at a predetermined angular position ;
The angle adjusting means includes an attachment plate attached to the ceiling surface, and an adjustment piece provided on the camera unit and fixed to the attachment plate at a predetermined angular position, and the adjustment piece and the A cover mounting structure for an image pickup apparatus, characterized in that the guide portion is composed of the same parts .

Images