Highway high-order video monitoring device and monitoring method

Abstract

The invention relates to the technical field of monitoring devices, in particular to an expressway high-position video monitoring device and a monitoring method.The expressway high-position video monitoring device comprises a base, the top of the base is fixedly connected with a supporting rod, the upper end of the side wall of the supporting rod is fixedly connected with a cross arm, one side of the top of the cross arm is fixedly connected with a water pump, and the output end of the water pump is fixedly connected with a water pumping pipe; the side, close to the water pump, of the top of the cross arm is fixedly connected with a connecting base, the inner wall of the connecting base is rotationally connected with a monitoring body, a notch is formed in the top of one end of the monitoring body, the water pumping pipes penetrate through the interior of the monitoring body and extend into the notch, and the tops of one ends of the water pumping pipes are fixedly connected with inclined spray head assemblies; a camera body is embedded in the position, located in the notch, of the surface of the monitoring body, a containing groove is formed in one side of the inner surface of the notch, and a motor is fixedly connected to the inner wall of the containing groove, the surface of the camera body is wetted, follow-up dust cleaning is facilitated, and meanwhile water drops and dust on the surface of the camera can be evenly adsorbed and cleaned without dead corners.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring devices, and in particular to a high-position video monitoring device and a monitoring method for a highway. Background Art

[0002] Highway monitoring devices are equipment systems installed on highways to monitor and record the traffic flow, vehicle driving conditions, road conditions, etc. of highways in real time. They usually include cameras, sensors, data transmission equipment, etc.

[0003] In the current monitoring devices on highways, most of the monitoring equipment camera surfaces do not have cleaning components, and some scrapers with cleaning components do not clean the camera surfaces thoroughly. When a large amount of dust and water droplets adhere to the camera surface, the viewing picture becomes blurred, which is not conducive to monitoring the highway. Therefore, it is necessary to propose a high-position video monitoring device and a monitoring method for highways. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a high-position video monitoring device and a monitoring method for a highway.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-position video monitoring device for a highway, comprising a base, a support rod fixedly connected to the top of the base, a cross arm fixedly connected to the upper end of the side wall of the support rod, a water pump fixedly connected to one side of the top of the cross arm, a water pump fixedly connected to the output end of the water pump, a connecting seat fixedly connected to the top of the cross arm close to the water pump, a monitoring body rotatably connected to the inner wall of the connecting seat, a notch opened at the top of one end of the monitoring body, and the water pumping pipe penetrates and connects to the inside of the monitoring body and extends into the notch, a nozzle assembly arranged in an inclined shape is fixedly connected to the top of one end of the water pumping pipe, and a camera body is embedded in the notch on the surface of the monitoring body; A receiving groove is provided on one side of the inner surface of the notch, a motor is fixedly connected to the inner wall of the receiving groove, a transmission shaft is fixedly connected to the output end of the motor, a transmission gear is fixedly connected to one end of the transmission shaft, a fixing ring is fixedly connected to the inner wall of the notch around the camera body, a gear ring is slidably connected inside the fixing ring, and the gear ring is meshed with the transmission gear, circular rings are fixedly connected to the outer walls on both sides of the gear ring, a plurality of tooth grooves are provided on the inner surface of the gear ring, push rods arranged in a Z shape are fixedly connected at both ends of the inner surface of the gear ring close to the plurality of tooth grooves, a limiting belt is fixedly connected to the inner surface of the gear ring between the two sides of the plurality of tooth grooves, and a second circular groove is provided on the upper end of the inner surface of both sides of the fixing ring. The inner surfaces of the two second circular grooves are slidably connected to limit rings, and the two limit rings are rotatably connected with rotating rods inside. An incomplete gear is fixedly connected between the two rotating rods, and the incomplete gears are meshed with a plurality of tooth grooves. An arc-shaped sponge rod is fixedly connected to one side of the incomplete gear. The upper and lower ends of one side of the two limit rings are slidably connected to movable rods, and an arc-shaped push rod is fixedly connected between one ends of the two movable rods. Notches are provided at the upper and lower ends of the outer walls of the two limit rings, and springs are fixedly connected to the bottom ends of the inner walls of the two notches. A clamping rod is fixedly connected to the top of one end of the two springs, and an inclined groove is provided on the outer wall of the two clamping rods close to the arc-shaped push rod, and the two movable rods are in conflict with the inclined groove.

[0006] Specifically, a lightning rod is fixedly connected to the top of the support rod, and a plurality of water outlet holes are penetrated and opened at the lower end of the surface of the fixing ring.

[0007] Specifically, a water storage tank is provided inside the cross arm, and the other end of the water pumping pipe extends to the lower end of the water storage tank. A plurality of filter holes are provided through one side of the top of the water storage tank.

[0008] Specifically, a through hole is formed on the side wall of the fixing ring close to the transmission gear, and first circular grooves are formed on the lower ends of the inner surfaces on both sides of the fixing ring, and the two circular rings are both clamped in the first circular grooves.

[0009] Specifically, one end of the two push rods is located in the two second circular grooves, and the two push rods correspond to the arc-shaped push rods.

[0010] Specifically, the rod walls of the two rotating rods are both provided with belt grooves, and the two limiting belts are both clamped in the belt grooves.

[0011] Specifically, the upper and lower surfaces of the two second circular grooves are provided with a clamping groove on one side close to the two clamping rods, and the clamping rods are clamped in the clamping grooves.

[0012] A monitoring method of a high-position video monitoring device for a highway comprises the following steps: Step 1: When it rains, rainwater will fall into the water tank through several filter holes. The water pump is started to transport the rainwater in the water tank to the nozzle assembly through the pumping pipe. The nozzle assembly can be started to spray water on the surface of the camera body, so that the dust on the surface of the camera body can be soaked, so as to improve the subsequent cleaning effect. The excess rainwater will flow out through several water outlets set on the surface of the fixing ring 4 to prevent rainwater from accumulating inside the monitoring body. Step 2: Then start the motor to drive the transmission shaft to rotate forward, the transmission shaft will drive the transmission gear to rotate, the rotation of the transmission gear will drive the gear ring to rotate, and when the gear ring engages with the incomplete gear through several tooth grooves, the sponge rod will be rotated to a vertical state, and the incomplete gear can be limited by the set limiting belt, and then the gear ring will continue to rotate forward, so that the vertical sponge rod can clean the water droplets and dust attached to the surface of the camera body, and then when it rotates to one circle, by clamping the card rod into the card slot, the limit ring is in a fixed state, and then start the motor to drive the transmission shaft to reverse, so that the sponge rod can be stored to prevent the sponge rod from obstructing the monitoring field of view of the camera body.

[0013] Beneficial effects of the present invention: (1) The high-position video monitoring device and monitoring method for a highway described in the present invention can collect rainwater through the water storage tank when it rains, and then spray the filtered rainwater onto the surface of the camera body through the nozzle assembly, thereby soaking the surface of the camera body and facilitating the subsequent cleaning of dust.

[0014] (2) The high-position video monitoring device and monitoring method for a highway described in the present invention can drive the transmission shaft to rotate forward and reversely by setting a motor, and can rotate the sponge rod to a vertical state through the setting of a gear ring, a plurality of tooth grooves, an incomplete gear, a rotating rod, a belt groove, and a limiting belt. Then, the limit ring can be put into an active state by setting a push rod, an arc push rod, a movable rod, a clamping rod, a clamping groove, an inclined groove, and a spring arranged in a Z shape on the inner surface of the gear ring. Then, the rotating gear ring can drive the sponge rod to rotate to clean the surface of the camera body, and the surface of the camera can be cleaned evenly without dead angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 A schematic diagram of the structure of a high-position video monitoring device and a monitoring method for a highway provided by the present invention; Figure 2A schematic diagram of the cross-arm cross-sectional structure of a high-position video monitoring device and monitoring method for a highway provided by the present invention; Figure 3 A schematic diagram of a cross-sectional structure of a monitoring body of a high-position video monitoring device and a monitoring method for a highway provided by the present invention; Figure 4 A schematic diagram of the internal structure of a fixed ring of a high-position video monitoring device and monitoring method for a highway provided by the present invention; Figure 5 A schematic cross-sectional structure diagram of a fixed ring of a high-position video monitoring device and a monitoring method for a highway provided by the present invention; Figure 6 A schematic diagram of an incomplete gear structure of a high-position video monitoring device and a monitoring method for a highway provided by the present invention; Figure 7 A schematic cross-sectional structure diagram of a limit ring of a high-position video monitoring device and a monitoring method for a highway provided by the present invention; Figure 8 A schematic diagram of a card rod structure of a high-position video monitoring device and a monitoring method for a highway provided by the present invention; Fig. 9 A schematic diagram of the enlarged structure at point A of a high-position video monitoring device and a monitoring method for a highway provided by the present invention.

[0017] In the figure: 1, base; 11, support rod; 12, lightning rod; 2, cross arm; 21, connection seat; 22, water pump; 23, water pipe; 24, nozzle assembly; 201, filter hole; 202, water storage tank; 3, monitoring body; 301, notch; 302, receiving slot; 31, camera body; 32, motor; 33, transmission shaft; 34, transmission gear; 4, fixing ring; 41, gear ring; 42, Circular ring; 43, tooth groove; 44, push rod; 45, limiting belt; 401, through hole; 402, first circular groove; 403, second circular groove; 404, water outlet; 433, clamping groove; 5, incomplete gear; 51, sponge rod; 52, rotating rod; 501, belt groove; 6, limiting ring; 601, notch; 61, movable rod; 62, arc-shaped push rod; 63, spring; 64, clamping rod; 65, inclined groove. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] like Figure 1-Figure 9As shown, a high-position video monitoring device for a highway described in the present invention comprises a base 1, a support rod 11 is fixedly connected to the top of the base 1, a cross arm 2 is fixedly connected to the upper end of the side wall of the support rod 11, a water pump 22 is fixedly connected to one side of the top of the cross arm 2, a water pump pipe 23 is fixedly connected to the output end of the water pump 22, a connecting seat 21 is fixedly connected to the side of the top of the cross arm 2 close to the water pump 22, a monitoring body 3 is rotatably connected to the inner wall of the connecting seat 21, a notch 301 is opened at the top of one end of the monitoring body 3, and the water pump pipe 23 is connected to the inside of the monitoring body 3 and extends into the notch 301, a nozzle assembly 24 arranged in an inclined shape is fixedly connected to the top of one end of the water pump pipe 23, and a camera body 31 is embedded in the notch 301 on the surface of the monitoring body 3; A receiving groove 302 is provided on one side of the inner surface of the notch 301, and a motor 32 is fixedly connected to the inner wall of the receiving groove 302, and a transmission shaft 33 is fixedly connected to the output end of the motor 32, and a transmission gear 34 is fixedly connected to one end of the transmission shaft 33. A fixing ring 4 is fixedly connected to the inner wall of the notch 301 around the camera body 31, and a gear ring 41 is slidably connected inside the fixing ring 4, and the gear ring 41 is meshed with the transmission gear 34. Circular rings 42 are fixedly connected to the outer walls on both sides of the gear ring 41, and a plurality of tooth grooves 43 are provided on the inner surface of the gear ring 41. Push rods 44 arranged in a Z shape are fixedly connected at both ends of the inner surface of the gear ring 41 near the plurality of tooth grooves 43. A limiting belt 45 is fixedly connected to the inner surface of the gear ring 41 between the two sides of the plurality of tooth grooves 43, and a second circular Groove 403, the inner surfaces of the two second circular grooves 403 are slidably connected to the limit rings 6, the two limit rings 6 are rotatably connected with the rotating rods 52 inside, an incomplete gear 5 is fixedly connected between the two rotating rods 52, the incomplete gears 5 are meshed with a plurality of tooth grooves 43, one side of the incomplete gear 5 is fixedly connected with an arc-shaped sponge rod 51, the upper and lower ends of one side of the two limit rings 6 are slidably connected with the movable rod 61, an arc-shaped push rod 62 is fixedly connected between one ends of the two movable rods 61, the upper and lower ends of the outer walls of the two limit rings 6 are provided with notches 601, the bottom ends of the inner walls of the two notches 601 are fixedly connected with springs 63, the tops of one ends of the two springs 63 are fixedly connected with clamping rods 64, the outer walls of the two clamping rods 64 are provided with inclined grooves 65 close to the arc-shaped push rods 62, and the two movable rods 61 are in conflict with the inclined grooves 65.

[0020] Specifically, a lightning rod 12 is fixedly connected to the top of the support rod 11, and a plurality of water outlet holes 404 are penetrated through the lower end of the surface of the fixing ring 4. The lightning rod 12 can play a role in lightning protection in thunderstorms, and rainwater can be discharged through the plurality of water outlet holes 404.

[0021] Specifically, a water tank 202 is opened inside the cross arm 2, and the other end of the pumping pipe 23 extends to the lower end of the water tank 202. A plurality of filter holes 201 are opened through one side of the top of the water tank 202. Rainwater can be collected inside the water tank 202 through the plurality of filter holes 201 and filtered through the plurality of filter holes 201.

[0022] Specifically, a through hole 401 is formed through the side wall of the fixing ring 4 near the transmission gear 34, and first circular grooves 402 are formed at the lower ends of the inner surfaces on both sides of the fixing ring 4, and two circular rings 42 are both stuck in the first circular grooves 402. The gear ring 41 will slide along the first circular grooves 402 through the two circular rings 42, and the transmission gear 34 can be meshed with the gear ring 41 through the through hole 401.

[0023] Specifically, one end of the two push rods 44 is located in the two second circular grooves 403 , and the two push rods 44 correspond to the arc-shaped push rods 62 , and the push rods 44 can drive the arc-shaped push rods 62 to move to one side.

[0024] Specifically, the rod walls of the two rotating rods 52 are each provided with a belt groove 501, and the two limiting belts 45 are both stuck in the belt groove 501. The two limiting belts 45 can limit the rotating rod 52 through the belt groove 501, and when the rotating rod 52 rotates and engages with a plurality of tooth grooves 43, the rotating rod 52 will move to one side along the limiting belt 6 through the belt groove 501.

[0025] Specifically, the upper and lower surfaces of the two second circular grooves 403 are provided with slots 433 near the two clamping rods 64, and the clamping rods 64 are clamped in the slots 433. When the clamping rods 64 are clamped in the slots 433, the limiting ring 45 is in a fixed state.

[0026] A monitoring method of a high-position video monitoring device for a highway comprises the following steps: Step 1: When it rains, rainwater will fall into the water tank 202 through the filter holes 201. The water pump 22 is started to transport the rainwater in the water tank 202 to the nozzle assembly 24 through the pumping pipe 23. The nozzle assembly 24 is started to spray water on the surface of the camera body 31, so that the dust on the surface of the camera body 31 can be soaked, so as to improve the subsequent cleaning effect. The excess rainwater will flow out through the several water outlet holes 404 set on the surface of the fixing ring 4 to prevent rainwater from accumulating inside the monitoring body 3. The second step: Then start the motor 32 to drive the transmission shaft 33 to rotate forward, the transmission shaft 33 will drive the transmission gear 34 to rotate, the rotation of the transmission gear 34 will drive the gear ring 41 to rotate, and when the gear ring 41 engages with the incomplete gear 5 through a plurality of tooth grooves 43, the sponge rod 51 is rotated to a vertical state, and the incomplete gear 5 can be limited by the set limiting belt 45, and then the gear ring 41 is continued to rotate forward, so that the vertical sponge rod 51 can clean the water droplets and dust attached to the surface of the camera body 31, and then when it rotates to one circle, by clamping the clamping rod 64 into the clamping groove 433, the limiting ring 6 is in a fixed state, and then the motor 32 is started again to drive the transmission shaft 33 to reverse, so that the sponge rod 51 can be stored to prevent the sponge rod 51 from obstructing the monitoring field of view of the camera body 31.

[0027] When in use, first start the motor 32 to rotate forward to drive the transmission shaft 33 to rotate, the transmission shaft 33 will drive the transmission gear 34 to rotate, the transmission gear 34 will drive the gear ring 41 to rotate through meshing, the gear ring 41 will slide along the first circular groove 402 through the two circular rings 42, when the gear ring 41 rotates to one side, the gear ring 41 will mesh with the incomplete gear 5 through a plurality of tooth grooves 43, at this time the incomplete gear 5 will rotate along the limiting ring 6 through the rotating rods 52 arranged at both ends, and the rotating rod 52 will move to one side along the limiting belt 45 through the belt groove 501, when the incomplete gear 5 meshes to the ends of a plurality of tooth grooves 43, at this time the incomplete gear 5 will drive the sponge rod 51 to be in a vertical state, then when the gear ring 41 continues to rotate, it moves to the arc push rod 62 through the Z-shaped push rod 44, when the push rod 44 conflicts with the arc push rod 62, the arc push rod 62 is forced to drive the movable rod 61 to move inward, at this time the movable When the movable rod 61 slides on the surface of the inclined groove 65, the movable rod 61 drives the clamping rod 64 to compress the spring 63 along the notch 601. When the movable rod 61 slides to the end along the surface of the inclined groove 65, the clamping rod 64 will be out of the clamping groove 433. At this time, the limit ring 6 is in an active state. When the gear ring 41 continues to rotate, it will drive the sponge rod 51 in the vertical state to rotate, so that the surface of the camera body 31 can be cleaned evenly without dead angles. When the gear ring 41 rotates one circle, the limit ring 6 moves to the clamping groove 433. When the clamping rod 64 is reset by the spring 63, it is clamped into the clamping groove 433. When the limit ring 6 is in a fixed state, the starting motor 32 drives the transmission shaft 33 to reverse. Similarly, the gear ring 41 can rotate in the opposite direction, which will cause the sponge rod 51 to rotate to the inside of the fixed ring 4 to avoid blocking the monitoring field of view of the camera body 31. When encountering rainy weather, PassRainwater can be collected inside the water tank 202 through the set several filter holes 201 and filtered through the several filter holes 201. When dust adheres to the surface of the camera body 31, the water pump 22 is started to transport the rainwater inside the water tank 202 to the nozzle assembly 24 through the suction pipe 23. Then, the inclined nozzle assembly 24 can spray water on the surface of the camera body 31. Then, by starting the motor 32 to rotate forward and reverse, the surface of the camera body 31 can be cleaned, and the water after cleaning will be discharged through the set several water outlet holes 404.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-position video monitoring device for a highway, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a support rod (11), the upper end of the side wall of the support rod (11) is fixedly connected to a cross arm (2), one side of the top of the cross arm (2) is fixedly connected to a water pump (22), the output end of the water pump (22) is fixedly connected to a water extraction pipe (23), the top of the cross arm (2) close to the water pump (22) is fixedly connected to a connecting seat (21), the inner wall of the connecting seat (21) is rotatably connected to a monitoring body (3), a notch (301) is provided at the top of one end of the monitoring body (3), and the water extraction pipe (23) is connected to the inside of the monitoring body (3) and extends into the notch (301), the top of one end of the water extraction pipe (23) is fixedly connected to an inclined nozzle assembly (24), and a camera body (31) is embedded in the notch (301) on the surface of the monitoring body (3); A receiving groove (302) is provided on one side of the inner surface of the notch (301); a motor (32) is fixedly connected to the inner wall of the receiving groove (302); a transmission shaft (33) is fixedly connected to the output end of the motor (32); a transmission gear (34) is fixedly connected to one end of the transmission shaft (33); a fixing ring (4) is fixedly connected to the inner wall of the notch (301) around the camera body (31); a gear ring (41) is slidably connected to the interior of the fixing ring (4); and the gear ring (41) is slidably connected to the transmission gear (34). The gears (34) are meshed and connected, the outer walls of both sides of the gear ring (41) are fixedly connected with circular rings (42), the inner surface of the gear ring (41) is provided with a plurality of tooth grooves (43), the two ends of the inner surface of the gear ring (41) close to the plurality of tooth grooves (43) are fixedly connected with push rods (44) arranged in a Z shape, the inner surface of the gear ring (41) is located between the two sides of the plurality of tooth grooves (43) and is fixedly connected with a limiting belt (45), the upper ends of the inner surfaces of both sides of the fixing ring (4) are provided with a second circular The inner surfaces of the two second circular grooves (403) are both slidably connected to limit rings (6), the two limit rings (6) are internally rotatably connected to rotating rods (52), an incomplete gear (5) is fixedly connected between the two rotating rods (52), the incomplete gears (5) are meshed with a plurality of tooth grooves (43), one side of the incomplete gear (5) is fixedly connected to a sponge rod (51) arranged in an arc shape, and the upper and lower ends of one side of the two limit rings (6) are both slidably connected to movable rods (61) An arc-shaped push rod (62) is fixedly connected between one end of the two movable rods (61), notches (601) are provided at the upper and lower ends of the outer walls of the two limit rings (6), springs (63) are fixedly connected to the bottom ends of the inner walls of the two notches (601), and clamping rods (64) are fixedly connected to the tops of one ends of the two springs (63), and inclined grooves (65) are provided on the outer walls of the two clamping rods (64) near the arc-shaped push rod (62), and the two movable rods (61) are in conflict with the inclined grooves (65).

2. The high-position video monitoring device for a highway according to claim 1, characterized in that: The top end of the support rod (11) is fixedly connected to a lightning rod (12), and a plurality of water outlet holes (404) are provided through the lower end of the surface of the fixing ring (4).

3. The high-position video monitoring device for a highway according to claim 1, characterized in that: A water storage tank (202) is provided inside the cross arm (2), and the other end of the water pumping pipe (23) extends to the lower end inside the water storage tank (202). A plurality of filter holes (201) are provided through one side of the top of the water storage tank (202).

4. The high-position video monitoring device for a highway according to claim 1, characterized in that: A through hole (401) is formed through the side wall of the fixing ring (4) close to the transmission gear (34), and first circular grooves (402) are formed at the lower ends of the inner surfaces of both sides of the fixing ring (4), and the two circular rings (42) are both clamped in the first circular grooves (402).

5. The high-position video monitoring device for a highway according to claim 1, characterized in that: One end of the two push rods (44) is located in the two second circular grooves (403), and the two push rods (44) both correspond to the arc-shaped push rod (62).

6. The high-position video monitoring device for a highway according to claim 1, characterized in that: The rod walls of the two rotating rods (52) are both provided with belt grooves (501), and the two limiting belts (45) are both clamped in the belt grooves (501).

7. The high-position video monitoring device for a highway according to claim 1, characterized in that: A clamping groove (433) is provided on the upper and lower surfaces of the two second circular grooves (403) close to the two clamping rods (64), and the clamping rods (64) are clamped in the clamping grooves (433).

8. A monitoring method for a highway high-position video monitoring device according to any one of claims 1 to 7, characterized in that: Step 1: When it rains, rainwater will fall into the water tank (202) through a plurality of filter holes (201). The water pump (22) is started to transport the rainwater in the water tank (202) to the nozzle assembly (24) through the water pumping pipe (23). The nozzle assembly (24) is started to spray water on the surface of the camera body (31), thereby soaking the dust on the surface of the camera body (31) to improve the subsequent cleaning effect. Excess rainwater will flow out through a plurality of water outlet holes (404) provided on the surface of the fixing ring 4 to prevent rainwater from accumulating inside the monitoring body (3); Step 2: Then the motor (32) is started to drive the transmission shaft (33) to rotate forward, and the transmission shaft (33) drives the transmission gear (34) to rotate. The rotation of the transmission gear (34) drives the gear ring (41) to rotate. When the gear ring (41) engages with the incomplete gear (5) through a plurality of tooth grooves (43), the sponge rod (51) is rotated to a vertical state, and the incomplete gear (5) can be limited by the provided limiting belt (45). Then the gear ring (41) is continued to rotate forward, so that the vertical sponge rod (51) can clean the water droplets and dust attached to the surface of the camera body (31). Then, when it rotates to one circle, the limiting ring (6) is fixed by clamping the clamping rod (64) into the clamping groove (433). Then the motor (32) is started again to drive the transmission shaft (33) to rotate reversely, so that the sponge rod (51) can be stored to prevent the sponge rod (51) from obstructing the monitoring field of the camera body (31).

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