JP6080033B2 - Surveillance camera device - Google Patents

Description

The present invention relates to a surveillance camera device.

  In recent years, camera devices have been required to have a function that places importance on privacy, such as clearly knowing the state of not taking a picture. A barrier that opens and closes the front of the camera is known for the purpose of protecting the photographing lens of the camera (see, for example, Patent Document 1). FIG. 15 is a diagram showing a structure of a main part of a conventional video camera provided with a barrier. The video camera barrier mechanism includes a lens barrel 100, and an upper barrier group 101 and a lower barrier group 102 that open and close the front surface of the lens barrel 100. The upper barrier group 101 and the lower barrier group 102 are provided around the upper barrier rotation axis 103 and the lower barrier rotation axis 104, which are provided at positions serving as contrasts with the optical axis of the lens interposed therebetween when viewed from the side. Driven in opposite directions. On the side of the lens barrel 100, a lower spur gear (not shown) and an upper spur gear (not shown) connected thereto are provided. The lower barrier group 102 is driven by the rotation of the lower spur gear driven by a motor (not shown), and the upper barrier group 101 is driven by the rotation of the upper spur gear.

  The upper barrier group 101 includes an upper central barrier 105 and an upper outer barrier 106. The lower barrier group 102 includes a lower central barrier 107 and a lower outer barrier 108. For example, in the upper barrier group 101, the upper outer barrier 106 contacts the upper central barrier 105 in an intermediate state in which the upper central barrier 105 is rotated by a predetermined rotation angle from the barrier closed state. Thereafter, the upper central barrier 105 and the upper outer barrier 106 are rotated in an overlapping state, and the barrier is opened. The lower barrier group 102 is similarly activated. In the above-described barrier mechanism, by driving either the upper spur gear or the lower spur gear, the upper barrier group 101 and the lower barrier group 102 are respectively connected to the upper barrier rotation shaft 103 and the lower barrier rotation shaft. It is possible to rotate them in opposite directions around 104.

JP 2010-151950 A (Claim 1, FIG. 1, paragraph 0033)

  However, in the barrier mechanism (cover opening / closing mechanism), each of the upper barrier group 101 and the lower barrier group 102 is rotatably supported. For this reason, two upper barrier rotating shafts 103 and four lower barrier rotating shafts 104 are required on one side and four on both sides, which makes it difficult to reduce the size and increase the part cost. Each of the upper barrier group 101 and the lower barrier group 102 includes an upper central barrier 105 and an upper outer barrier 106, and a lower central barrier 107 and a lower outer barrier 108. For this reason, for example, in the upper barrier group 101, a space to rotate in a state where the upper central barrier 105 and the upper outer barrier 106 overlap with each other must be secured in the barrier thickness direction, and this also makes it difficult to reduce the size in the thickness direction. Also, the cost of parts increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a surveillance camera device that can meet the needs of emphasizing privacy and that can be configured in a compact and inexpensive cover opening / closing mechanism.

The surveillance camera device of the present invention can open and close a housing, an optical unit attached to the housing, a transparent dome cover that covers the optical unit and is disposed in the housing, and a lens of the optical unit A cover opening / closing mechanism comprising at least two opening / closing covers covering the cover, and when the optical unit is not shooting, the opening / closing cover of the cover opening / closing mechanism is between the dome cover and the optical unit. Is to be placed .

  According to the camera device of the present invention, it is possible to meet the need for privacy, and the cover opening / closing structure can be configured in a compact and inexpensive manner.

1 is an external perspective view illustrating a camera device according to an embodiment of the present invention. The perspective view which notched a part of camera apparatus shown in FIG. Side sectional view of the camera apparatus shown in FIG. The perspective view of the base shown in FIG. 4 is an exploded perspective view of the floating mount shown in FIG. A perspective view of a cover opening / closing mechanism in which the first opening / closing cover and the second opening / closing cover are closed The perspective view of the cover opening / closing mechanism with the first opening / closing cover and the second opening / closing cover opened Front view of gearbox with stepper motor removed Exploded perspective view of cover opening / closing mechanism Sectional view of the vicinity of the drive side spindle (A) is a perspective view of the first cover side gear, (B) is a perspective view of the first cover drive end. Sectional view near the non-drive side spindle Time chart explaining opening and closing operation with time on the horizontal axis (A) is a side view of the cover opening / closing mechanism in a closed state, (B) is a side view of the cover opening / closing mechanism in an open state, and (C) is a side view showing an opening / closing stroke of the cover opening / closing mechanism. Side view of barrier mechanism in conventional video camera FIG. 2 is an external view of the camera device according to the embodiment with the outer dome cover removed.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
1 is an external perspective view showing a camera device according to an embodiment of the present invention, FIG. 2 is a perspective view of the camera device shown in FIG. 1 with a part cut away, and FIG. 3 is a side cross-sectional view of the camera device shown in FIG. FIG.
The camera device 10 according to the present embodiment includes a housing 11, an optical unit 12, a drive-side support shaft 13 and a non-drive-side support shaft 14, a first opening / closing cover 15 (see FIG. 6), and a second opening / closing cover 16. (See FIG. 6), a stepping motor 17 that is a drive motor, a first cover side gear 18 (see FIG. 10), and a second cover side gear 19 (see FIG. 10) are main components.

  The camera device 10 is used, for example, for facility monitoring, and is installed on the wall or ceiling of the facility. The housing 11 is formed in an annular shape with, for example, a synthetic resin, and a transparent plastic outer dome cover 20 is disposed at the center. The bottom opening 21 of the housing 11 is closed by the base 22. A detachable bracket 23 is attached to the outer surface side of the base 22, and the base 22 is attached to the ceiling or the like by the detachable bracket 23. For example, when the camera device 10 is installed on a ceiling, the outer dome cover 20 of the housing 11 faces downward.

  The base 22 has a component housing space 24 around the optical unit 12. The component housing space 24 is provided with a main board 25 (IF board) which is a board for image processing and power supply, and a sub board 26 (unifa board) which is a board for image processing. On the main board 25, a control unit (not shown) including a CPU and a storage unit is mounted. A part of the main board 25 is covered with an insulating case 27. The control unit can control the opening / closing operation of a cover opening / closing mechanism 28 described later by a control signal sent to the stepping motor 17. The component storage space 24 is provided with an SD slot 29 for storing an SD card. Further, the component housing space 24 houses a dehumidifying element (not shown), a waterproof pigtail cable, a heater for heating at a low temperature, and the like.

4 is a perspective view of the base 22 shown in FIG. 2, and FIG. 5 is an exploded perspective view of the floating mount 30 shown in FIG.
The camera device 10 includes a floating mount 30. As shown in FIG. 5, a fisheye lens 33 is attached to the lens holder 31 of the optical unit 12 via a packing material 32. A MOS holder 35 is fixed to a sensor substrate 34 connected to the main substrate 25 by a MOS holder fixing screw 36. The sensor substrate 34 to which the MOS holder 35 is fixed is fixed to the lower surface side of the lens holder 31 by the MOS bracket 37. The MOS bracket 37 is fixed to the lower surface side of the lens holder 31 by a MOS bracket fixing screw 38.

Supporting flanges 39 project from the outer periphery of the four places of the lens holder 31 to which the MOS bracket 37 and the like are fixed, and support pillar through holes 40 (see FIG. 6) are formed in each of the supporting flanges 39. Established. Four support fitting bosses 41 protrude from the base 22, and each support fitting boss 41 fixes a support post 42 in an upright state.
In the present embodiment, four support pillars 42 are erected on the base 22, but the support pillars 42 may be three or four or more.

  Each support column 42 is penetrated by the support column through hole 40 of the support collar 39. A stopper screw 43 is fixed to the tip of the support column 42 penetrating the support collar 39, and the stopper screw 43 regulates the separation of the support collar 39 from the support column 42. A coil spring 44 is extrapolated to the support column 42 between the base 22 and the support collar 39, and the coil spring 44 is attached in a direction in which the lens holder 31 (that is, the optical unit 12) floats from the base 22. It is fast. The support flange 39, the support column 42, the stopper screw 43, and the coil spring 44 constitute the floating mount 30. That is, the optical unit 12 is movably attached to the housing 11 via the floating mount 30.

6 is a perspective view of the cover opening / closing mechanism 28 in which the first opening / closing cover 15 and the second opening / closing cover 16 are closed. FIG. 7 is a perspective view of the cover opening / closing mechanism 28 in which the first opening / closing cover 15 and the second opening / closing cover 16 are opened. 8 is a front view of the gear box 45 with the stepping motor 17 removed, FIG. 9 is an exploded perspective view of the cover opening / closing mechanism 28, FIG. 10 is a sectional view in the vicinity of the drive side support shaft, and FIG. FIG. 12 is a perspective view of the first cover side gear 18, FIG. 12B is a perspective view of the first cover drive end 46, and FIG. 12 is a sectional view of the vicinity of the non-drive side support shaft.
The cover opening / closing mechanism 28 includes a first opening / closing cover 15 and a second opening / closing cover 16 between the outer dome cover 20 and the optical unit 12. The first opening / closing cover 15 and the second opening / closing cover 16 include a driving-side support shaft 13 (see FIG. 9) and a non-driving-side support shaft 14 (see FIG. 12) protruding from both sides of the lens holder 31 of the optical unit 12. Is rotatably supported by.

Each of the first opening / closing cover 15 and the second opening / closing cover 16 is formed in a spherical shape obtained by cutting the spherical surface with a pair of spaced arc-shaped cutting lines so as to have a predetermined width.
Further, the first opening / closing cover 15 and the second opening / closing cover 16 are each provided with a protruding portion 72 so as to cover a range reflected by the fisheye lens 33. The protrusion 72 is disposed between the support collars 39 when the first opening / closing cover 15 and the second opening / closing cover 16 are opened / closed.
In the optical unit 12, the fisheye lens 33 is covered by closing the first opening / closing cover 15 and the second opening / closing cover 16 as shown in FIG. 6, and the fisheye lens 33 is exposed by being opened as shown in FIG. A stopper portion 47 is formed at the edge of the first opening / closing cover 15 and the second opening / closing cover 16 in the opening direction, and the stopper portion 47 is in contact with a stopper seat surface 48 formed on the base side of the support collar 39. The The first opening / closing cover 15 and the second opening / closing cover 16 end in the open state when the stopper portion 47 abuts against the stopper seat surface 48 and the opening is restricted.

  As shown in FIG. 10, the first open / close cover 15 and the second open / close cover 16 have a first cover drive end 46 and a second cover drive end 49 that are coaxially and rotatably supported on the drive side support shaft 13. Further, as shown in FIG. 12, the first cover non-drive end 50 and the second cover non-drive end 51 are coaxially and rotatably supported on the non-drive side support shaft 14. More precisely, as shown in FIG. 10, the first cover driving end 46 and the second cover driving end 49 are connected via an annular convex portion 52 between the first cover side gear 18 and the second cover side gear 19. The drive side support shaft 13 is rotatably supported.

  The cover opening / closing mechanism 28 includes a stepping motor 17 as a drive source and a gear box 45. The stepping motor 17 is driven and controlled by the control unit. The drive control is performed by rotating the number of pulses, which is a control signal sent from the control unit, by a rotation angle obtained by multiplying the basic step angle of the stepping motor 17 (0.709 degrees in this embodiment).

  A drive gear 53 is fixed to the drive shaft of the stepping motor 17. The rotation of the drive gear 53 is transmitted to the first cover side gear 18 and the second cover side gear 19 by the gear box 45. The first opening / closing cover 15 and the second opening / closing cover 16 open / close the first opening / closing cover 15 and the second opening / closing cover 16 by an engagement structure described later. A box plate 54 is provided in the gear box 45, and the box plate 54 holds the stepping motor 17. The box plate 54 is fixed to the lens holder 31 by fixing the plate fixing screw 55 to the screw hole 56 of the lens holder 31. The box plate 54 is provided with a drive side support shaft receiving hole 57 into which the tip of the drive side support shaft 13 is inserted. Further, a gear through hole 58 that allows the drive gear 53 to pass therethrough and a support rod 59 that supports the stepping motor 17 are provided. The drive gear 53 having one end fixed to the drive shaft of the stepping motor 17 is rotatably supported between the box plate 54 and the lens holder 31 and the other end is supported by the drive gear support shaft 60. The drive gear 53 meshes with a first intermediate gear 62 supported by the first intermediate gear support shaft 61 of the lens holder 31. The first intermediate gear 62 meshes with the first cover side gear 18.

  The drive gear 53 is also meshed with a reversing gear 64 supported by a reversing gear support shaft 63 of the lens holder 31. The reverse gear 64 meshes with the second intermediate gear 66 that is supported by the second intermediate gear support shaft 65 of the lens holder 31. The second intermediate gear 66 meshes with the second cover side gear 19. Accordingly, the first cover side gear 18 and the second cover side gear 19 are rotated by one stepping motor 17, but the second cover side gear 19 is reversed with respect to the first cover side gear 18 by the reverse gear 64. It is rotated.

  The first cover side gear 18 is supported by the driving side support shaft 13 and engaged with the first cover driving end 46, and the rotation from the driving gear 53 is transmitted. The second intermediate gear 66 is supported by the drive side support shaft 13 and engaged with the second cover drive end 49, and the rotation from the drive gear 53 is transmitted by the reverse gear 64 in the reverse rotation with the first cover side gear 18. The Thereby, the opening / closing operation | movement by making the 1st opening / closing cover 15 and the 2nd opening / closing cover 16 rotate oppositely is enabled.

  As shown in FIG. 11, the first cover side gear 18 and the second cover side gear 19 have a plurality of concentric circumferential directions on the surfaces facing the first cover driving end 46 and the second cover driving end 49. A hemispherical engagement recess 67 is formed. On the other hand, the first cover driving end 46 and the second cover driving end 49 are formed with tongue-like elastic engagement pieces 68 by U-shaped notches. A hemispherical convex portion 69 that engages with the engaging concave portion 67 is formed at the free end of the elastic engaging piece 68.

  In the normal opening / closing driving state, the first cover side gear 18 and the first cover driving end 46 are rotated by the engagement concave portion 67 and the hemispherical convex portion 69 being engaged as shown in FIG. . Further, the second cover side gear 19 and the second cover drive end 49 are also rotated by the engagement concave portion 67 and the hemispherical convex portion 69 being engaged. On the other hand, when a large opening / closing load is applied to the first opening / closing cover 15 and the second opening / closing cover 16 by some external force, the elastic engagement piece 68 is elastically displaced and the hemispherical protrusion 69 is retracted from the engagement recess 67, The engagement is released and the first cover side gear 18 and the second cover side gear 19 are idled. As a result, an overload applied to the stepping motor 17 is avoided.

  As shown in FIG. 12, a first cover non-drive end 50 and a second cover non-drive end 51 are rotatably supported on the non-drive side support shaft 14. An E-ring 70 is provided at the tip of the non-drive side support shaft 14 as a retaining ring for restricting the first cover non-drive end 50 and the second cover non-drive end 51 from falling off. A clearance 71 that is a displacement permissible gap is provided between the first cover non-drive end 50 and the second cover non-drive end 51 and the retaining ring. When the first opening / closing cover 15 and the second opening / closing cover 16 are deformed by an external force, the clearance 71 is moved along the non-driving side support shaft 14 so that the first cover non-driving end 50 and the second cover non-driving end 51 are provided. Absorbs the displacement.

Next, the opening / closing operation of the cover opening / closing mechanism 28 will be described.
FIG. 13 is a time chart for explaining the opening / closing operation with time on the horizontal axis, FIG. 14A is a side view of the cover opening / closing mechanism 28 in a closed state, FIG. 13B is a side view of the cover opening / closing mechanism 28 in an opened state, ) Is a side view showing an opening / closing stroke of the cover opening / closing mechanism 28.
The opening / closing operation of the cover opening / closing mechanism 28 is performed by the stepping motor 17 being controlled by the control unit. As described above, the stepping motor 17 is rotated at a rotation angle obtained by multiplying the number of pulses from the control unit by the basic step angle. In the present embodiment, the opening / closing operation range of the first opening / closing cover 15 and the second opening / closing cover 16 is set to, for example, 50 degrees as shown in FIG.

The cover opening / closing mechanism 28 sends out a step-out pulse from the control unit in order to return the origin to the start end during the opening operation and to return the origin to the start end during the closing operation. The step-out pulse is different between the opening operation and the closing operation. These different step-out pulses are stored in the storage unit. More step-out pulses are set during the opening operation than during the closing operation. This is because the stopper portion 47 is brought into contact with the stopper seat surface 48 during the opening operation so as to reliably reach the end of the mechanism.
Note that a retry operation may be further performed as control for reliably reaching the end of the mechanism.

In the present embodiment, the step-out pulse is set so that an additional rotation of, for example, 5 degrees or more at the rotation angle is performed during the opening operation.
Further, the step-out pulse during the closing operation is set to 8 pulses or 12 pulses, which is smaller than that.

  Furthermore, when a retry operation is performed in order to confirm that it is completely opened, it is opened for the step-out pulse during the closing operation, and after the returning operation, the operation is performed for the step-out pulse during the opening operation. .

FIG. 16 is an external view of the camera device according to the embodiment of the present invention with the outer dome cover 20 removed.
In the present embodiment, a hidden cover 73 is provided outside the first opening / closing cover 15 and the second opening / closing cover 16.
This is to prevent the optical unit 12 from being seen from the outside when the fisheye lens 33 is covered with the first opening / closing cover 15 and the second opening / closing cover 16. If the portion of the optical unit 12 is visible from the outside, even if the shooting range is covered with the first opening / closing cover 15 and the second opening / closing cover 16, from the gap between the first opening / closing cover 15 and the second opening / closing cover 16, There is a risk of being misunderstood as being taken by the camera device 10. Therefore, the hidden cover 73 is provided so as to cover the gap between the first opening / closing cover 15 and the second opening / closing cover 16.
The first open / close cover 15, the second open / close cover 16, and the hidden cover 73 are preferably set to the same color (for example, white) so that it can be emphasized that the fisheye lens 33 is covered. The hidden cover 73 needs to be provided in a range that is not reflected in the fisheye lens 33 when the first opening / closing cover 15 and the second opening / closing cover 16 are open.

Next, the operation of the camera apparatus 10 having the above configuration will be described.
In the camera device 10 having the above-described configuration, the optical unit 12 is covered by the first opening / closing cover 15 and the second opening / closing cover 16, so that it is possible to clearly see a state where photographing is not performed, that is, a state where privacy is emphasized. It becomes like this. The first opening / closing cover 15 and the second opening / closing cover 16 can be opened and closed. Since the central barrier and the outer barrier do not rotate on one side as in the conventional structure, the space in the barrier thickness direction can be reduced. In addition, the first cover driving end 46 and the second cover driving end 49 are coaxially and rotatably supported by one driving side support shaft 13, and the first cover non-driving end 50 and the second cover non-driving are supported. The end 51 is coaxially and rotatably supported by one non-driving side support shaft 14. As a result, half the number of shafts, which conventionally required four, is sufficient.

  Even when an external force is applied in a state where the first opening / closing cover 15 and the second opening / closing cover 16 are closed, the first cover non-drive end 50 and the second cover non-drive end 51 are moved to the clearance 71. Moved. Thereby, an external force is absorbed by the elastic deformation of the first opening / closing cover 15 and the second opening / closing cover 16, and the first opening / closing cover 15 and the second opening / closing cover 16 are not easily broken.

  Further, even when an external force is applied in a state where the first opening / closing cover 15 and the second opening / closing cover 16 are closed, the optical unit 12 that supports the first opening / closing cover 15 and the second opening / closing cover 16 includes: It is moved against the urging force of the coil spring 44. Thereby, the external force is absorbed by the deformation of the coil spring 44, and the first opening / closing cover 15 and the second opening / closing cover 16 are hardly broken.

  Therefore, according to the camera device 10 according to the present embodiment, it is possible to meet the need for privacy, and the cover opening / closing structure can be configured in a compact and inexpensive manner.

DESCRIPTION OF SYMBOLS 10 Camera apparatus 11 Housing | casing 12 Optical unit 13 Drive side spindle 14 Non-drive side spindle 15 1st opening / closing cover 16 2nd opening / closing cover 17 Stepping motor (drive motor)
18 First cover side gear 19 Second cover side gear 21 Bottom opening 22 Base 42 Support pillar 43 Stopper screw 44 Coil spring 46 First cover drive end 49 Second cover drive end 50 First cover non-drive end 51 Second cover Non-drive end 53 Drive gear 64 Reverse gear 70 E-ring
71 Clearance (displacement allowance)

Claims (5)

A housing,
An optical unit attached to the housing;
A transparent dome cover that covers the optical unit and is disposed in the housing;
A cover opening / closing mechanism comprising at least two opening / closing covers that cover the lens of the optical unit so as to be openable / closable;
In a state where the optical unit is not photographing, an opening / closing cover of the cover opening / closing mechanism is disposed between the dome cover and the optical unit.
Surveillance camera device. The surveillance camera device according to claim 1,
The opening / closing cover of the cover opening / closing mechanism has a color that emphasizes that it covers the lens of the optical unit,
Surveillance camera device. The surveillance camera device according to claim 1,
The cover opening and closing mechanism is
A drive motor for driving the drive gear;
A first cover side gear that rotates by being transmitted with rotation from the drive gear;
Rotation from the drive gear is transmitted in the reverse rotation to the first cover side gear by the reversing gear, and the second cover side gear rotates.
A spherical first opening / closing cover that is driven to open / close the lens of the optical unit according to the rotation of the first cover side gear;
A spherical second opening / closing cover that is driven to open and close the lens of the optical unit according to the rotation of the second cover side gear,
Surveillance camera device. The surveillance camera device according to claim 1,
The cover opening and closing mechanism is
A drive-side support shaft and a non-drive-side support shaft projecting from both sides of the optical unit;
The first cover driving end and the second cover driving end are coaxially and rotatably supported on the driving side support shaft, and the first cover non-driving end and the second cover non-driving end are coaxially rotatable on the non-driving side support shaft. A spherical first opening / closing cover and a second opening / closing cover supported by
A drive motor for driving the drive gear;
A first cover-side gear supported by the drive-side support shaft and engaged with the first cover drive end to transmit rotation from the drive gear;
A second cover side gear supported by the driving side support shaft and engaged with the second cover driving end, and rotation from the driving gear is transmitted in reverse rotation to the first cover side gear by a reversing gear; provided,
Surveillance camera device. The surveillance camera device according to claim 3 or 4,
Each of the first opening / closing cover and the second opening / closing cover has a protruding portion that protrudes in a direction away from the center of the lens at a substantially central portion of the opening / closing cover body opposite to the lens side of the optical unit. ,
Surveillance camera device.

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