JP6774356B2 - Surveillance camera - Google Patents

Description

The present disclosure relates to a surveillance camera that captures an area to be monitored.

Conventionally, a PTZ camera capable of turning, tilting, and zooming (various PTZ (Pan Tilt Zoom) operations) has been used as an example of a surveillance camera. The PTZ type surveillance camera can obtain omnidirectional imaging information by remote control because the pan rotation is endless rotation. PTZ type surveillance cameras with excellent imaging information collection performance have a wide range of applications such as crime prevention and disaster prevention, and there is a demand to improve the weather resistance performance against sunlight, wind, rain and snow.

Generally, when it is desired to improve the weather resistance of a surveillance camera, the housing body including the imaging portion of the surveillance camera is often covered with a dome cover. However, since the dome cover is a hemispherical cover, it is not possible to take an image on the installation surface side. Therefore, an example of a PTZ type surveillance camera with improved weather resistance has been proposed while enabling imaging on the installation surface side without using a dome cover by having a waterproof structure for the pan rotating part and the tilt rotating part. (See, for example, Patent Document 1 and the like).

Japanese Unexamined Patent Publication No. 2016-181768

However, for example, when a surveillance camera is used in a cold region, icicles may adhere to the front of the camera lens even if the configuration of Patent Document 1 is used. The icicles attached to the front of the camera lens may appear as a part of the captured image, which deteriorates the visibility of the captured image of the desired subject. On the other hand, if the surveillance camera is equipped with an icicle removing device such as a heater or an icicle melting injection device, both the initial cost and the running cost increase. Therefore, there is a request to remove the icicle without attaching a large-scale device, but it is still difficult to satisfy the request with the configuration of Patent Document 1.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a surveillance camera capable of removing icicles adhering to the front surface of an imaging lens while suppressing an increase in accessories.

In the present disclosure, a pan housing that is swiveled around a pan axis, a support arm whose base end is supported on a side portion of the pan housing, and a tilt axis orthogonal to the pan axis at the tip of the support arm. A tilt housing having a lens that is rotatably supported by the tilt housing and whose optical axis is perpendicular to the tilt axis, and a tilt housing that extends in a direction along the optical axis and disturbs the lens. The obstruction attached to the eaves is removed in response to the approach of the eaves that suppress the incident of light and the eaves based on the tilt rotation drive of the tilt housing centered on at least one of the tilt axes. Provided is a surveillance camera comprising a front outer surface portion of a pan housing.

Further, the present disclosure discloses a pan housing that is swiveled around a pan shaft, and a support arm whose base end is rotatably supported by a first tilt shaft orthogonal to the pan shaft on a side portion of the pan housing. A tilt housing having a lens at the tip of the support arm, which is rotationally driven by a second tilt axis in the same direction as the first tilt axis and whose optical axis is in a direction orthogonal to the second tilt axis. The tilt housing is provided so as to extend in a direction along the optical axis, and is centered on an eaves portion that suppresses the incident of ambient light on the lens, and at least one of the first tilt axis and the second tilt axis. Provided is a surveillance camera including a front outer surface portion of the pan housing for removing obstacles adhering to the eaves in response to the approach of the eaves based on the tilt rotation drive of the tilt housing.

Further, in the present disclosure, a tilt housing having a lens, a cover glass covering the lens, and a cover glass extending from the tilt housing to the opposite side of the lens in a direction along the optical axis of the lens are described. An eaves that suppresses the intrusion of ambient light onto the lens, a wiper that wipes the outer surface of the cover glass in response to the movement of the wiper arm, and a wiper that protrudes from the wiper arm toward the opposite side of the cover glass in the direction along the optical axis. Provided is a surveillance camera including an obstacle removing member for removing an obstacle adhering to the eaves in response to the movement of the wiper arm.

According to the present invention, it is possible to remove icicles adhering to the front surface of an imaging lens while suppressing an increase in accessories.

Perspective view of the surveillance camera according to the first embodiment Front view of the surveillance camera shown in FIG. Perspective view of the surveillance camera shown in FIG. 1 with icicles attached. Perspective view of a surveillance camera with an icicle in contact with the front outer surface by tilt rotation drive Perspective view of a surveillance camera with icicles removed by the front outer surface Perspective view of the surveillance camera according to the second embodiment Perspective view of a surveillance camera with the icicles in contact with the gate-shaped icicle crushing member by tilt rotation drive Perspective view of a surveillance camera with icicles removed by a gate-shaped icicle crushing member Perspective view of the surveillance camera according to the third embodiment Perspective view of a surveillance camera with the icicles in contact with the L-shaped icicle crushing member by pan rotation drive Perspective view of a surveillance camera in which the icicles have been removed by an L-shaped icicle crushing member. Perspective view of the surveillance camera according to the modified example of the third embodiment Perspective view of a surveillance camera with the icicles in contact with the L-shaped icicle crushing member with reinforcement by pan rotation drive Perspective view of a surveillance camera in which the icicles have been removed by an L-shaped icicle crushing member with reinforcement. Perspective view of the surveillance camera according to the fourth embodiment Enlarged view of the main part of the surveillance camera before the icicles are removed by the contact rod provided on the wiper arm Enlarged view of the main part of the surveillance camera after the icicles have been removed by the contact rod provided on the wiper arm

Hereinafter, each embodiment in which the details of the surveillance camera according to the present disclosure are specifically disclosed will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art. It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

In the following embodiments, a surveillance camera having two tilt axes will be described as an example, but the present invention is not limited thereto. In the following embodiments, the tilt axis may include a virtual axis (tilt rotation center) in addition to the physical tilt axis. Similarly, the pan axis may include a virtual axis (pan rotation center) in addition to the physical pan axis.

(Embodiment 1)
First, an example of the surveillance camera according to the first embodiment will be described.

FIG. 1 is a perspective view of the surveillance camera according to the first embodiment. In this embodiment, the directions of up, down, front, back, left and right follow the direction of the arrow shown in FIG.

The surveillance camera 100 according to the first embodiment has a main body housing 11, a pan housing 13, and a tilt housing 15. The main body housing 11 is a mounting base, and the lower surface (lower surface in FIG. 1) is the mounting surface. The main body housing 11 is formed, for example, in a substantially cylindrical shape in which the mounting surface side has a slightly larger diameter than the opposite side. In the surveillance camera 100, the mounting surface of the main body housing 11 is fixed to the fixed surface by fasteners such as bolts 17.

FIG. 2 is a front view of the surveillance camera shown in FIG.

A support arm 19 is attached to the side portion of the pan housing 13. The pan housing 13 is rotatably supported on the upper surface of the main body housing 11 around the pan shaft Pc and is swiveled. The pan shaft Pc coincides with the axis of the main body housing 11.

The pan housing 13 is provided with a pan drive device 21. The pan drive device 21 includes a pan shaft Pc, a pan motor 23, a shaft 25, an intermediate worm wheel 27, and an intermediate worm 29.

The pan motor 23 has a drive shaft fixed to the pan housing 13 and projecting upward. A drive worm 31 is fixed to the drive shaft of the pan motor 23. A shaft 25 in a direction perpendicular to the pan shaft Pc is rotatably supported in the pan housing 13 between the pan motor 23 and the pan shaft Pc. An intermediate worm wheel 27 that meshes with the drive worm 31 is fixed to one end of the shaft 25. An intermediate worm 29 that meshes with the pan worm wheel 33 is fixed to the other end of the shaft 25.

Therefore, when the pan motor 23 is driven and the drive worm 31 transmits rotation to the intermediate worm wheel 27 of the shaft 25, the shaft 25 rotates. As the shaft 25 rotates, the intermediate worm 29 rotates around the outer circumference of the pan worm wheel 33 fixed to the main body housing 11. That is, the intermediate worm 29 revolves around the pan axis Pc. As a result, the pan housing 13 is pan-rotated driven around the pan shaft Pc.

The pan housing 13 supports the base end of one support arm 19 on the side portion. That is, the support arm 19 pan-rotates integrally with the pan housing 13. The pan housing 13 rotatably supports the base end of the support arm 19 by a first tilt axis T1c that intersects at a right angle away from the pan axis Pc. That is, the support arm 19 can be tilted about the first tilt axis T1c. The support arm 19 stands up from the pan housing 13 and supports the tilt housing 15 at its tip.

The pan housing 13 supporting the support arm 19 on the side portion has a front side outer surface portion 35 (see FIG. 1) on the front side.

The tilt housing 15 is provided with a tilt drive device 37. The tilt drive device 37 includes a first tilt shaft T1c, a support arm 19, a first tilt motor 39, a first tilt motor 39, and a second tilt shaft T2c.

The tilt housing 15 is formed, for example, in a substantially elliptical rotating body shape rotated around a long axis of an ellipse. A part of the tilt housing 15 having a substantially elliptical rotating body shape is cut off. The tip of the support arm 19 is arranged in this part. The tilt housing 15 is tilt-rotatably supported at the tip of the support arm 19 with one end in the radial direction centered on a second tilt shaft T2c parallel to the first tilt shaft T1c. That is, the tilt housing 15 is rotatably supported by the second tilt shaft T2c.

The second tilt axis T2c passes through the center of the tilt housing 15 formed in a substantially elliptical rotating body shape, for example. The tilt housing 15 is supported by the support arm 19 at an upward distance from the pan housing 13. That is, the tilt housing 15 can be tilt-rotated by two axes, the first tilt axis T1c and the second tilt axis T2c, at the upper and lower ends of the support arm. As a result, the tilt housing 15 can protrude from the pan housing 13 (move in a direction away from the pan shaft Pc).

In the surveillance camera 100 according to the present embodiment, the base end of the support arm 19 may be fixed to the side portion of the pan housing. In this case, the first tilt axis T1c is omitted. In the surveillance camera in which the first tilt axis T1c is omitted, the tilt housing 15 is tilt-rotated and driven around the second tilt axis T2c. According to a surveillance camera that tilt-rotates and drives only by the second tilt axis T2c, the icicle 69 is the most economical by using the front outer surface portion 35 and the tilt-rotation drive without adding accessories, as will be described later. In addition to being able to remove efficiently, the number of parts can be reduced, the structure can be simplified, and the weight of the device can be reduced.

The support arm 19 has a worm wheel 41 and a first tilt motor 39. The worm wheel 41 is coaxial with the first tilt shaft T1c and is fixed to the pan housing 13. The first tilt motor 39 is fixed to the support arm 19. In the first tilt motor 39, the worm 43 fixed to the drive shaft meshes with the worm wheel 41. The first tilt motor 39 rotates the support arm 19 with respect to the pan housing 13 about the first tilt shaft T1c by the rotation of the drive shaft.

A second tilt motor 45 for rotating the tilt housing 15 is provided at the tip of the support arm 19. The second tilt motor 45 rotates the tilt housing 15 with respect to the support arm 19 about the second tilt shaft T2c by the rotation of the drive shaft. As a result, the tilt housing 15 is tilt-rotated and driven around one or both of the first tilt shaft T1c and the second tilt shaft T2c.

The surveillance camera 100 is provided with a controller 47. The controller 47 can rotate the second tilt motor 45 and the first tilt motor 39 synchronously. In this synchronous rotation, the first tilt motor 39 and the second tilt motor 45 can be rotated in the same direction at the same angular velocity or at different angular velocities. Further, in the synchronous rotation, the first tilt motor 39 and the second tilt motor 45 can be rotated in opposite directions at the same angular velocity or at different angular velocities.

The surveillance camera 100 accommodates the camera 49 in the tilt housing 15. In the surveillance camera 100, the postures shown in FIGS. 1 and 2 in which the pan axis Pc is along the vertical direction and the center of the tilt housing 15 is located on the pan axis Pc is the vertical posture. At this time, the optical axis Oct of the camera 49 is orthogonal to the pan axis Pc. At this time, the direction of the optical axis Oct is forward.

In the surveillance camera 100, the first tilt axis T1c at the base end of the support arm 19 is separated forward from the pan axis Pc by a predetermined offset distance. As a result, the tilt housing 15 tilts in a direction away from the tilt housing 15 so that a large amount of protrusion forward from the pan housing 13 can be secured. As a result, the surveillance camera 100 can easily monitor the area directly below.

The tilt housing 15 houses the camera 49 (see FIG. 2) inside. The camera 49 includes an image sensor and an image pickup unit having a lens 51. The camera 49 is arranged so that the optical axis Occ of the lens 51 (not shown) of the camera 49 is aligned in a direction that intersects at a right angle away from the second tilt axis T2c.

The lens 51 of the camera 49 is covered with a cover glass 53 provided on the tilt housing 15 that can transmit visible light and infrared rays. The optical axis Oct of the camera 49 and the second tilt axis T2c do not intersect. That is, the optical axis Oct of the camera 49 is arranged on the opposite side of the first tilt axis T1c (pan housing 13) with the second tilt axis T2c in between in the vertical posture shown in FIG. The camera 49 is arranged at a position where the optical axis Oct is displaced above the second tilt axis T2c (on the side opposite to the pan housing 13). That is, in the surveillance camera 100, the optical axis Oct is separated from the second tilt axis T2c by an offset distance A (see FIG. 2).

The tilt housing 15 is provided with a canopy 55 as an example of the eaves extending in the direction along the optical axis Oct. The eaves 55 suppresses the incident light (for example, direct sunlight) on the cover glass 53 and the lens 51. The posture of the tilt housing 15 is set by the controller 47 so that the eaves 55 are arranged on the upper side in the vertical direction with respect to the lens 51. For example, when the surveillance camera 100 is installed on a horizontal lower surface such as a ceiling surface, the tilt housing 15 is rotated so that the eaves 55 are on the upper side.

A wiper 57 is provided in the vicinity of the cover glass 53 of the tilt housing 15. The wiper 57 includes a wiper motor (not shown), a wiper drive shaft 59, a parallel crank mechanism 61, a wiper arm 63, and a blade (not shown).

In the wiper 57, the wiper drive shaft 59 is in the direction along the optical axis Oct of the camera 49. The wiper drive shaft 59 translates the wiper arm 63 in the left-right direction via the parallel crank mechanism 61. In the parallel crank mechanism 61, the base ends of a pair of link rods 65 having the same length are connected to the wiper drive shaft 59, respectively. The tips of the pair of link rods 65 are rotated by the articulating rod 67 and connected in pairs. The wiper arm 63 is fixed to the articulating rod 67. In the wiper 57, since the pair of link rods 65 have the same length, the connecting rod 67 moves in parallel, and the wiper arm 63 fixed to the wiper arm 63 moves in parallel in the left-right direction. That is, the wiper 57 swings (reciprocates) when the wiper drive shaft 59 is rotated in the forward and reverse directions by the wiper motor. As a result, a blade (wiping material) made of rubber or the like attached to the wiper arm 63 moves along the outer surface of the cover glass 53, and dirt or the like adhering to the outer surface of the cover glass 53 is wiped off.

In the surveillance camera 100, a pan rotating portion is formed between the main body housing 11 and the pan housing 13. The area between the pan housing 13 and the support arm 19 is the first tilt rotating portion. The portion between the support arm 19 and the tilt housing 15 is the second tilt rotating portion.

Data transmission of imaging information and motor control signals in the pan rotating unit, the first tilt rotating unit, and the second tilt rotating unit is performed by, for example, non-contact PLC (PowerLine Communication) communication using an antenna.

Further, in the surveillance camera 100, electric power is transmitted in the pan rotating portion by, for example, a slip ring. Further, electric power is transmitted in the first tilt rotation unit and the second tilt rotation unit by, for example, a twist line.

In the surveillance camera 100, the pan rotating portion, the first tilt rotating portion, and the second tilt rotating portion have a watertight structure. The pan rotating portion, the first tilt rotating portion, and the second tilt rotating portion are formed of a waterproof structure, for example, by closing the gap between the shaft and the bearing with a waterproof sealing material that contacts both of them. As a result, the surveillance camera 100 can be used outdoors without being covered with a dome cover, and has high weather resistance.

Next, the operation of the surveillance camera 100 of this embodiment will be described.

FIG. 3 is a perspective view of the surveillance camera shown in FIG. 1 to which an icicle is attached.

In the surveillance camera 100, the eaves 55 approached the front outer surface portion 35 and adhered to the eaves 55 by the tilt rotation drive of the tilt housing 15 centered on at least one of the first tilt axis T1c and the second tilt axis T2c. The icicle 69 as an example of an obstacle is removed (for example, crushed).

FIG. 4 is a perspective view of a surveillance camera in a state where the icicle is in contact with the front outer surface portion by tilt rotation drive.

In the surveillance camera 100, when the tilt housing 15 is tilt-rotated driven around at least one of the first tilt axis T1c and the second tilt axis T2c, the eaves 55 of the tilt housing 15 are driven by the front outer surface portion 35 of the pan housing 13. Approach.

FIG. 5 is a perspective view of the surveillance camera from which the icicles have been removed by the front outer surface portion.

When the eaves 55 approaches the front outer surface portion 35, the icicle 69 adhering in the direction protruding from the eaves 55 abuts on the front outer surface portion 35 and is crushed by the reaction force from the front outer surface portion 35. At this time, it is more preferable that the tilt housing 15 repeats the tilt rotation drive by forward and reverse rotation so that the eaves 55 approach and separate from the front outer surface portion 35.

In this surveillance camera 100, a part of the pan housing 13 (front outer surface portion 35) is used as a constituent member for crushing the icicle 69. By utilizing the front outer surface portion 35 and the tilt rotation drive, the icicle 69 can be removed most economically and efficiently without adding accessory parts.

In particular, in the surveillance camera 100, since the tilt housing 15 is tilted forward by the first tilt axis T1c and the second tilt axis T2c, the eaves 55 can be brought close to the front outer surface portion 35 which is almost directly below. it can. This makes it possible to more reliably remove the icicle 69.

(Embodiment 2)
Next, an example of the surveillance camera according to the second embodiment will be described.

FIG. 6 is a perspective view of the surveillance camera according to the second embodiment.

The surveillance camera 200 according to the second embodiment is an icicle crushing member as an example of a gate-shaped obstacle removing member having a contact rod 71 extending in the pan turning direction in front of the front outer surface portion 35. 73 is arranged. In the icicle crushing member 73, an L-shaped parallel support rod 75 having an upwardly bent portion is fixed to the main body housing 11. Both ends of the contact rod 71 are supported by the upward bending portion of the pair of support rods 75. As a result, the contact rod 71 is arranged in front of the front outer surface portion 35. The abutting rod 71 may have an arc shape along the pan swirling circle or a straight line shape along the tangent line of the pan swirling circle.

FIG. 7 is a perspective view of a surveillance camera in a state where the icicle is applied to the gate-shaped icicle crushing member by tilt rotation drive.

In this surveillance camera 200, the contact rod 71 is arranged further forward than the front outer surface portion 35. When the tilt housing 15 is tilt-rotated driven around at least one of the first tilt shaft T1c and the second tilt shaft T2c, the eaves 55 of the tilt housing 15 approach the contact rod 71.

FIG. 8 is a perspective view of a surveillance camera in which an icicle is removed by a gate-shaped icicle crushing member.

When the eaves 55 approaches the abutting rod 71, the icicle 69 adhering in the direction protruding from the eaves 55 abuts on the abutting rod 71 and is crushed by the reaction force from the abutting rod 71. At this time, it is more preferable that the tilt housing 15 repeats the tilt rotation drive in the forward and reverse rotation directions so that the eaves 55 pass through the contact rod 71 in the vertical direction and reciprocate. That is, the tilt housing 15 is bowed.

According to this surveillance camera 200, since the contact rod 71 is higher than the front outer surface portion 35, the icicle 69 is brought into contact with the ice column 69 at a smaller tilt rotation angle than when the icicle 69 is directly applied to the front outer surface portion 35. It becomes possible to hit the rod 71. Further, since the abutting rod 71 is along the pan turning direction, it can be locally applied in the direction intersecting the icicle 69, and stress can be concentrated to facilitate the crushing of the icicle 69.

(Embodiment 3)
Next, an example of the surveillance camera according to the third embodiment will be described.

FIG. 9 is a perspective view of the surveillance camera according to the third embodiment.

In the surveillance camera 300 according to the third embodiment, an icicle crushing member 79 as an example of an L-shaped obstacle removing member having a contact rod 77 extending along the pan shaft Pc is projected from the main body housing 11. Will be done. The contact rod 77 is fixed to the protruding tip of the support rod 81 that protrudes outward in the radial direction from the main body housing 11.

FIG. 10 is a perspective view of a surveillance camera in a state where the icicle is applied to the L-shaped icicle crushing member by the pan rotation drive.

In the surveillance camera 300, the contact rod 77 is arranged further forward than the front outer surface portion 35. When the tilt housing 15 is tilt-rotated driven around at least one of the first tilt shaft T1c and the second tilt shaft T2c, the eaves 55 of the tilt housing 15 approach the contact rod 71. When the eaves 55 approaches the abutting rod 71, the icicles 69 adhering in the direction protruding from the eaves 55 are arranged close to each other in the direction intersecting the abutting rod 77. In this state, the pan housing 13 is driven to rotate the pan.

FIG. 11 is a perspective view of a surveillance camera in which an icicle is removed by an L-shaped icicle crushing member.

When the tilt housing 15 is driven to rotate the pan together with the pan housing 13, the icicle 69 comes into contact with the contact rod 77 and is crushed by the reaction force from the contact rod 77. At this time, it is more preferable that the tilt housing 15 repeats the pan rotation drive in the forward and reverse rotation directions so that the eaves 55 pass through the contact rod 77 in the left-right direction and reciprocate. That is, the tilt housing 15 is swung left and right.

Pan rotation drive is used for crushing the icicle 69 by the L-shaped icicle crushing member 79. In the surveillance camera 300, the pan drive device 21 has the largest rotational torque. Therefore, the surveillance camera 300 can remove the icicle 69 with the strongest crushing force.

(Modified Example of Embodiment 3)
Next, an example of a surveillance camera according to a modified example of the third embodiment will be described.

FIG. 12 is a perspective view of a surveillance camera according to a modified example of the third embodiment.

The surveillance camera 300A according to the modified example of the third embodiment has an icicle crushing member 83 that stands up in a direction along the main body housing 11. The icicle crushing member 83 is fixed by the fixing plate 85 formed at the lower part being fastened together with the bolt 17 that fixes the main body housing 11 to the fixed surface. The icicle crushing member 83 has an abutting rod 87 at the upper portion in a direction substantially orthogonal to the pan axis Pc. Further, the icicle crushing member 83 is supported by the main body housing 11 at a substantially intermediate position in the vertical direction by the reinforcing rod 89. As a result, it is fixed to the main body housing 11 with high strength. The icicle crushing member 83 extends from the surveillance camera 300A, for example, from the side of the attachment member (not shown) to a separate pole (not shown) to which the surveillance camera 300A is attached, and extends the arm (not shown) to the surveillance camera 300A (not shown). For example, it may be fixed to the main body housing 11) of the surveillance camera 300A.

FIG. 13 is a perspective view of a surveillance camera in a state where the icicle is applied to an L-shaped icicle crushing member with a reinforcing material by pan rotation drive.

In this surveillance camera 300A, when the tilt housing 15 is tilt-rotated driven around at least one of the first tilt axis T1c and the second tilt axis T2c, the eaves 55 of the tilt housing 15 approach the contact rod 87. When the eaves 55 approaches the abutting rod 87, the icicles 69 adhering in the direction protruding from the eaves 55 are arranged in close proximity to the abutting rod 87. In this state, the pan housing 13 is driven to rotate the pan.

FIG. 14 is a perspective view of a surveillance camera in which an icicle is removed by an L-shaped icicle crushing member with a reinforcing material.

When the tilt housing 15 is driven to rotate the pan together with the pan housing 13, the icicle 69 comes into contact with the contact rod 87 and is crushed by the reaction force from the contact rod 87. At this time, it is more preferable that the tilt housing 15 repeats the pan rotation drive in the forward and reverse rotation directions so that the eaves 55 pass through the contact rod 87 in the left-right direction and reciprocate. That is, the tilt housing 15 is swung left and right.

Pan rotation drive is used for crushing the icicle 69 by the L-shaped icicle crushing member 83. In the surveillance camera 300A, the pan drive device 21 has the largest rotational torque. Therefore, even in the case of the surveillance camera 300A, the icicle 69 can be removed with the strongest crushing force. Further, since the ice column crushing member 83 has an abutting rod 87 in a direction substantially orthogonal to the pan axis Pc, the ice column 69 is brought into contact with the abutting rod 87 at a smaller tilt rotation angle than the abutting rod 77 in the direction along the pan axis Pc. Can be applied to.

(Embodiment 4)
Next, an example of the surveillance camera according to the fourth embodiment will be described.

FIG. 15 is a perspective view of the surveillance camera according to the fourth embodiment.

In the surveillance camera 400 according to the fourth embodiment, the wiper 57 is provided with an icicle crushing member 91 as an example of an obstacle removing member. The icicle crushing member 91 has an abutting rod 93 protruding from the wiper arm 63 on the opposite side of the cover glass 53 in the direction along the optical axis Oct. The contact rod 93 of the icicle crushing member 91 crushes the icicle 69 attached to the eaves 55 by moving the wiper arm 63.

FIG. 16 is an enlarged view of a main part of the surveillance camera before the icicles are removed by the contact rod provided on the wiper arm.

In this surveillance camera 400, when the wiper 57 is driven, the wiper arm 63 is translated by the parallel crank mechanism 61. The eaves 55 are arranged on the opposite side of the cover glass 53 with the wiper arm 63 interposed therebetween. In the vertical posture of the surveillance camera 400, the icicle 69 hangs down from the eaves 55 in the vertical direction and adheres to the camera 400.

In the surveillance camera 400, the wiper drive shaft 59 and the wiper arm 63 are connected via the parallel crank mechanism 61, but the parallel crank mechanism 61 may be omitted. In other words, the wiper 57 does not have to be driven based on the translation of the wiper arm 63 in the left-right direction via the parallel crank mechanism 61. In this case, the wiper drive shaft 59 and the wiper arm 63 are directly attached, for example, and the wiper 57 moves on an arc with the wiper drive shaft 59 as the rotation axis.

FIG. 17 is an enlarged view of a main part of the surveillance camera after the icicles have been removed by the contact rod provided on the wiper arm.

When the wiper arm 63 is translated in the state where the icicle 69 is attached, the contact rod 93 protruding forward from the icicle arm 63 hits the icicle 69 in the direction intersecting the icicle 69 and crushes the icicle 69.

In this surveillance camera 400, the icicle 69 can be immediately removed without driving the pan drive device 21 and the tilt drive device 37. Therefore, it is suitable for frequently removing relatively small icicles 69. Further, in the surveillance camera 400, the icicle removing function can be easily added to the surveillance camera only by replacing the wiper arm 63 without changing the existing surveillance camera main body structure.

Therefore, according to the surveillance camera 100, the surveillance camera 200, the surveillance camera 300, the surveillance camera 300A, and the surveillance camera 400 according to each of the above-described embodiments, the ice column adhering to the front surface of the surveillance camera while suppressing the increase of accessories. 69 can be removed.

Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood. Further, each component in the above-described embodiment may be arbitrarily combined as long as the gist of the invention is not deviated.

For example, in the above configuration example, the configuration including the first tilt axis and the second tilt axis has been described, but in the surveillance camera according to the present invention, the tilt housing is tilt-rotated driven only by the second tilt axis. You may. That is, the surveillance camera has the same effect as described above even if the support arm does not tilt forward.

In the above-described embodiments 2 and 3, the contact rods 71 and 77 of the icicle crushing members 73 and 79 are used during normal rotation of the surveillance cameras 200 and 300 (for example, during pan rotation and tilt rotation), respectively. , The surveillance cameras 200 and 300 may be provided at a position where collision with other members (for example, the support arm 19 and the tilt housing 15) can be avoided.

The present disclosure is useful as a surveillance camera capable of removing icicles adhering to the front surface of an imaging lens while suppressing an increase in accessories.

11 ... Main body housing 13 ... Pan housing 15 ... Tilt housing 19 ... Support arm 35 ... Front outer surface 51 ... Lens 53 ... Cover glass 55 ... Eaves (eaves)
57 ... Wiper 63 ... Wiper arm 69 ... Icicle (obstacle)
71 ... Abutment rod 73 ... Icicle crushing member (obstacle removal member)
77 ... Abutment rod 79 ... Icicle crushing member (obstacle removing member)
83 ... Icicle crushing member (obstacle removal member)
87 ... Abutment rod 91 ... Icicle crushing member (obstacle removal member)
93 ... Contact rods 100, 200, 300, 300A, 400 ... Surveillance camera Occ ... Optical axis Pc ... Pan axis T1c ... First tilt axis T2c ... Second tilt axis

Claims (5)

A pan housing that is swiveled around the pan axis and
On the side of the pan housing, a support arm whose base end is supported and
A tilt housing having a lens at the tip of the support arm, which is rotationally driven by a tilt axis orthogonal to the pan axis and whose optical axis is in a direction orthogonal to the tilt axis.
An eaves portion provided in the tilt housing extending in a direction along the optical axis to suppress the incident of ambient light on the lens, and an eaves portion.
A front outer surface portion of the pan housing that removes obstacles adhering to the eaves portion in response to the approach of the eaves portion based on the tilt rotation drive of the tilt housing about the tilt axis.
Surveillance camera. A pan housing that is swiveled around the pan axis and
On the side of the pan housing, a support arm whose base end is rotatably supported by a first tilt axis orthogonal to the pan axis, and
A tilt housing having a lens at the tip of the support arm, which is rotationally driven by a second tilt axis in the same direction as the first tilt axis and whose optical axis is in a direction orthogonal to the second tilt axis.
An eaves portion provided in the tilt housing extending in a direction along the optical axis to suppress the incident of ambient light on the lens, and an eaves portion.
The pan housing that removes obstacles adhering to the eaves in response to the approach of the eaves based on the tilt rotation drive of the tilt housing centered on at least one of the first tilt axis and the second tilt axis. With the front outer surface of the
Surveillance camera. A gate-shaped obstacle removing member extending along the pan turning direction is arranged in front of the front outer surface portion.
The surveillance camera according to claim 2. The pan housing is rotatably supported around the pan shaft by a main body housing to which the pan shaft is fixed.
An L-shaped obstacle removing member extending along the pan shaft is projected from the main body housing.
The surveillance camera according to claim 2. A tilt housing with a lens and
The cover glass that covers the lens and
An eaves portion that extends from the tilt housing to the side opposite to the lens with the cover glass in the direction along the optical axis of the lens to suppress the intrusion of ambient light onto the lens.
With the wiper that wipes the outer surface of the cover glass according to the movement of the wiper arm,
It is provided with an obstacle removing member that projects from the wiper arm in a direction along the optical axis to the opposite side of the cover glass and removes obstacles attached to the eaves in response to the movement of the wiper arm.
Surveillance camera.

Images