Monitoring device for key area in construction process of trailing suction dredger

Abstract

The invention discloses a key area monitoring device in the construction process of a trailing suction dredger, which comprises a base, the upper end of the base is connected with a bottom table, and the top end of the bottom table is provided with a placing hole; when the lifting mechanism is used, the hydraulic cylinder is firstly placed in the placing hole and fixed in the placing hole, then the bottom ring is placed at the top end of the bottom table and fixed on the bottom table through the screw, and at the moment, the ejector rod is fixedly connected with the output end of the hydraulic cylinder through the screw, so that the lifting mechanism can be conveniently assembled on the bottom table, and the hydraulic cylinder is started; the top rod can move in the vertical direction, the top rod drives the top plate to move, the top plate drives the camera to move in the vertical direction, and therefore the effect of the height of the camera is achieved, meanwhile, after the height of the camera is lowered, the camera does not need to be maintained and cleaned through a ladder, maintenance and cleaning management of the camera is facilitated, and the wire conduit connected to the top plate is convenient to use. The lead is used for placing the camera and is prevented from being exposed to the outside.

Description

Technical Field

[0001] The invention relates to the field of monitoring devices, in particular to a key area monitoring device in the construction process of a trailing suction dredger. Background Art

[0002] Trailing suction dredger is a type of suction dredger. It sucks mud through the rake head placed on both sides or the tail of the hull, and works in a way of sucking mud while sailing. It uses mud rakes to loosen the soil, and there is an open bottom mud tank in the ship. The tank volume indicates the size of the ship.

[0003] A trailing suction dredger is a large self-propelled, bunker-type dredger equipped with a trailing head excavation tool and a hydraulic mud suction device. When dredging, the trailing suction pipe is lowered to the riverbed, and the vacuum effect of the mud pump is used to absorb mud from the riverbed through the trailing head and the mud suction pipe into the mud bin of the dredger. When the mud bin is full, the dredger is sailed to the mud dumping area to open the mud door to unload the mud, or the excavated mud is directly discharged from the ship. Some dredgers can also suck out the mud unloaded in the mud bin for filling. It has good navigation performance, can self-propelled, self-loaded, and self-unloaded, and is in a navigation state during work, and does not require a positioning device. It is suitable for the excavation and maintenance of unprotected, narrow and long coastal access channels, and is most efficient when excavating silt.

[0004] Surveillance cameras need to be installed in the construction workshop to monitor the operation in the workshop. Common surveillance cameras are usually fixed on the wall. When the surveillance camera is damaged, the lens surface is covered with dust and other impurities, or the camera position cannot be adjusted, it is not easy to remove the surveillance camera for maintenance, replacement, or moving the camera position because the surveillance camera is fixed on the wall. Therefore, a key area monitoring device is needed during the construction of a bucket suction dredger to facilitate the adjustment of the surveillance camera. Summary of the invention

[0005] The purpose of the present invention is to overcome the defect that the camera is inconvenient to adjust and to provide a key area monitoring device during the construction process of a trailing suction dredger.

[0006] The technical solution to achieve the above-mentioned purpose is: a key area monitoring device during the construction process of a trailing suction dredger, including a base, the upper end of the base is connected to a bottom platform, the top of the bottom platform is provided with a placement hole, a lifting mechanism is arranged on the bottom platform, a moving mechanism is installed on the base, an adjusting mechanism is installed on the moving mechanism, a limiting mechanism is arranged on the base, and an auxiliary mechanism is installed on the lifting mechanism.

[0007] Preferably, the lifting mechanism includes a bottom ring, a screw, an outer tube, a hydraulic cylinder, a push rod, a top plate and a camera, the placement hole is connected with a hydraulic cylinder, the top end of the base is threadedly connected with a screw, the side wall of the screw is threadedly connected to the bottom ring, the top end of the bottom ring is connected to the bottom end of the outer tube, the placement hole is connected with a hydraulic cylinder, the output end of the hydraulic cylinder is connected with a push rod, the top end of the push rod is connected with a top plate, and the bottom end of the top plate is connected with a camera.

[0008] Preferably, the inner side of the bottom ring is connected to the inner side of the outer tube, the inner side of the bottom ring is connected to the inner side of the placement hole, the inner diameter of the bottom ring is equal to the inner diameter of the outer tube, the top port diameter of the placement hole is equal to the inner diameter of the bottom ring, the diameter of the hydraulic cylinder is smaller than the diameter of the outer tube placement hole, and the inner wall of the outer tube is in sliding contact with the outer wall of the top rod.

[0009] Preferably, the moving mechanism includes moving wheels, support rods, a base plate, round rods, connecting plates and through holes. The four top corners of the base are each provided with a through hole, a support rod is slidably connected in the through hole, the bottom end of the support rod is rotatably connected to a moving wheel, the top of the support rod is connected to the base plate, the top of the base plate is connected to four round rods distributed in an array, the top of the round rod is connected to a connecting plate, the top center of the connecting plate and the top center of the base plate are both provided with an opening, the side wall of the outer tube passes through the opening, the inner diameter of the opening is larger than the outer diameter of the bottom ring, and the side length of the moving wheel is smaller than the side length of the through hole.

[0010] Preferably, the adjustment mechanism includes a fixing ring, an adjusting screw, a nut and a guide rod, the side wall of the outer tube is connected to the fixing ring, the side wall of one side of the fixing ring is threadedly connected to the adjusting screw, the side wall of the adjusting screw is threadedly connected to two nuts, the connecting plate is located between the two nut clamps, the bottom end of the guide rod is threadedly connected to the connecting plate, and the side wall of the guide rod slides through the side wall of the fixing ring.

[0011] Preferably, the guide rod is threadedly connected to the connecting plate via a screw hole, and the distance between the fixing ring and the base is greater than the distance between the top of the connecting plate and the bottom of the moving wheel.

[0012] Preferably, the limiting mechanism includes a through hole and a limiting pin, a plurality of through holes are opened on the top side wall of the base, a limiting pin is inserted and connected in the through holes, a pre-installed plug-in hole is provided on the ground, and the limiting pin is inserted into the pre-installed plug-in hole.

[0013] Preferably, the auxiliary mechanism includes a slide groove, a sliding rod, a first screw, a mirror and a second screw. The side walls on both sides of the top plate are provided with slide grooves. The side walls of the slide grooves are slidably connected to the sliding rod. The side walls of the sliding rod are rotatably connected to the second screw. The side walls of the second screw are threadedly connected to the top plate. The side walls of the sliding rod are threadedly connected to the first screw. The bottom end of the first screw is connected to a mirror, and the mirrors are located on both sides of the camera.

[0014] The beneficial effects of the present invention are:

[0015] 1) First put the hydraulic cylinder into the placement hole and fix it in the placement hole, then place the bottom ring on the top of the base and fix it to the base with screws. At this time, use screws to fix the top rod and the output end of the hydraulic cylinder. The lifting mechanism can be easily assembled on the base, and the hydraulic cylinder is started to allow the top rod to move in the vertical direction. The top rod drives the top plate to move, and the top plate drives the camera to move in the vertical direction, thereby achieving the effect of the camera height. At the same time, after lowering the height of the camera, there is no need to set up a ladder to maintain and clean the camera, which facilitates the maintenance and cleaning of the camera. The wire tube connected to the top plate is used to place the camera's wires to prevent the wires from leaking to the outside.

[0016] 2) Before the bottom ring is fixed on the base, holes are opened at the top center of the connecting plate and the top center of the bottom plate. The side wall of the outer tube passes through the hole. The inner diameter of the hole is larger than the outer diameter of the bottom ring, so that the bottom ring and the outer tube pass through the hole from top to bottom and are fixed to the base. The moving wheel and the support rod pass through the through hole. At this time, the guide rod passes through the fixing ring and is threadedly connected with the connecting plate, and then the adjusting screw is threadedly connected with the fixing ring and passes through the fixing ring. At this time, the first nut is screwed into the adjusting screw, and then the adjusting screw is passed through the connecting plate. At this time, the second nut is screwed into the adjusting screw, so that the connecting plate separates the two nuts, and the two nuts are rotated so that the two nuts clamp the connecting plate, that is, the two nuts are in contact with the surface of the connecting plate, and the adjusting screw can still drive the two nuts to rotate with the adjusting screw, and the nut does not clamp the connecting plate, so that the connecting plate and the adjusting screw can move synchronously, and the reverse operation can disassemble the adjusting mechanism and the moving mechanism.

[0017] 3) Set the base in the suspended place, and then turn the adjusting screw. The adjusting screw can vertically pull the connecting plate through the nut, and the connecting plate drives the guide rod to move, the connecting plate drives the round rod to move, the round rod drives the bottom plate to move, and the bottom plate drives the support rod to move, thereby driving the vertical movement of the moving wheel, thereby adjusting the position of the moving wheel, thereby adjusting the use and storage effect of the moving wheel. When the moving wheel is below the bottom end of the base, the base can be easily pushed. When the base is moved to the pre-installation hole on the specified ground, the moving wheel is stored, that is, when the bottom of the moving wheel is above the bottom end of the base, at this time, the limit pin is inserted into the through hole and the pre-installation hole, so that the base is fixed to the ground, realizing the effect of adjustable movement of the base, and the lifting mechanism and the base are both located on the base, so that the effect of movable camera is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front structural schematic diagram of the present invention;

[0019] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0020] Figure 3 It is a bottom-up structural schematic diagram of the present invention;

[0021] Figure 4 It is a cross-sectional structural schematic diagram of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the mobile mechanism of the present invention;

[0023] Figure 6 It is a schematic diagram of the explosion structure of the limiting mechanism of the present invention;

[0024] Figure 7 It is a schematic diagram of the explosion structure of the auxiliary mechanism of the present invention;

[0025] Figure 8 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0026] Fig. 9 yes Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0027] Fig.10 yes Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0028] Fig.11 yes Figure 7 Schematic diagram of the enlarged structure at D in the middle.

[0029] Figure Number:

[0030] 1. Base; 2. Bottom platform; 3. Placement hole; 4. Lifting mechanism; 401. Bottom ring; 402. Screw; 403. Outer tube; 404. Hydraulic cylinder; 405. Push rod; 406. Top plate; 407. Camera; 5. Moving mechanism; 501. Moving wheel; 502. Support rod; 503. Bottom plate; 504. Round rod; 505. Connecting plate; 506. Perforation; 6. Adjusting mechanism; 601. Fixing ring; 602. Adjusting screw; 603. Nut; 604. Guide rod; 7. Limiting mechanism; 701. Through hole; 702. Limiting pin; 8. Auxiliary mechanism; 801. Slide groove; 802. Slide rod; 803. First screw; 804. Mirror; 805. Second screw; 9. Wire tube. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Reference Figure 1-11 A key area monitoring device during the construction of a trailing suction dredger includes a base 1, the upper end of the base 1 is connected to a bottom platform 2, the top of the bottom platform 2 is provided with a placement hole 3, a lifting mechanism 4 is arranged on the bottom platform 2, a moving mechanism 5 is installed on the base 1, an adjusting mechanism 6 is installed on the moving mechanism 5, a limiting mechanism 7 is arranged on the base 1, and an auxiliary mechanism 8 is installed on the lifting mechanism 4.

[0034] Reference Figure 1-4The lifting mechanism 4 includes a bottom ring 401, a screw 402, an outer tube 403, a hydraulic cylinder 404, a push rod 405, a top plate 406 and a camera 407. The hydraulic cylinder 404 is connected to the placement hole 3. The top of the bottom platform 2 is threadedly connected to the screw 402. The side wall of the screw 402 is threadedly connected to the bottom ring 401. The top of the bottom ring 401 is connected to the bottom end of the outer tube 403. The hydraulic cylinder 404 is connected to the placement hole 3. The output end of the hydraulic cylinder 404 is connected to the push rod 405. The push rod 406 is connected to the top plate 406. 5 is connected to the top end with a top plate 406, the bottom end of the top plate 406 is connected to a camera 407, the inner side of the bottom ring 401 is connected to the inner side of the outer tube 403, the inner side of the bottom ring 401 is connected to the inner side of the placement hole 3, the inner diameter of the bottom ring 401 is equal to the inner diameter of the outer tube 403, the top diameter of the placement hole 3 is equal to the inner diameter of the bottom ring 401, the diameter of the hydraulic cylinder 404 is smaller than the diameter of the placement hole 3 of the outer tube 403, and the inner wall of the outer tube 403 is equal to the outer wall of the push rod 405 in sliding contact.

[0035] First, place the hydraulic cylinder 404 into the placement hole 3 and fix it in the placement hole 3. Then, place the bottom ring 401 on the top of the base 2 and fix the bottom ring 401 on the base 2 with the screw 402. At this time, use the screw to fix the top rod 405 to the output end of the hydraulic cylinder 404, so that the lifting mechanism 4 can be easily assembled on the base 2, and start the hydraulic cylinder 404 to make the top rod 405 move in the vertical direction. The top rod 405 drives the top plate 406 to move, and the top plate 406 drives the camera 407 to move in the vertical direction, thereby achieving the effect of the height of the camera 407. At the same time, after lowering the height of the camera 407, there is no need to set up a ladder to maintain and clean the camera 407, which facilitates the maintenance and cleaning management of the camera 407. The wire tube 9 connected to the top plate 406 is used to place the wires of the camera 407 to prevent the wires from leaking to the outside.

[0036] Reference Figure 1-10The moving mechanism 5 includes a moving wheel 501, a support rod 502, a bottom plate 503, a round rod 504, a connecting plate 505 and a through hole 506. The four top corners of the base 1 are all provided with a through hole 506, and the support rod 502 is slidably connected in the through hole 506. The bottom end of the support rod 502 is rotatably connected to the moving wheel 501, the top of the support rod 502 is connected to the bottom plate 503, the top of the bottom plate 503 is connected to four round rods 504 distributed in an array, the top of the round rod 504 is connected to the connecting plate 505, and the connecting plate 50 5 and the top center of the bottom plate 503 are both provided with openings, the side walls of the outer tube 403 pass through the openings, the inner diameter of the openings is larger than the outer diameter of the bottom ring 401, the side length of the moving wheel 501 is smaller than the side length of the through hole 506, the limiting mechanism 7 includes a through hole 701 and a limiting pin 702, a plurality of through holes 701 are provided on the top side wall of the base 1, and the limiting pin 702 is inserted and connected in the through hole 701, a pre-installed plug-in hole is provided on the ground, and the limiting pin 702 is inserted into the pre-installed plug-in hole.

[0037] The adjusting mechanism 6 includes a fixing ring 601, an adjusting screw 602, a nut 603 and a guide rod 604. The side wall of the outer tube 403 is connected to the fixing ring 601. The side wall of one side of the fixing ring 601 is threadedly connected to the adjusting screw 602. The side wall of the adjusting screw 602 is threadedly connected to two nuts 603. The connecting plate 505 is located between the two nuts 603. The bottom end of the guide rod 604 is threadedly connected to the connecting plate 505. The side wall of the guide rod 604 slides through the side wall of the fixing ring 601. The guide rod 604 is threadedly connected to the connecting plate 505 through a screw hole. The distance between the fixing ring 601 and the base 1 is greater than the distance between the top of the connecting plate 505 and the bottom of the moving wheel 501.

[0038] Before the bottom ring 401 is fixed to the bottom platform 2, the top center of the connecting plate 505 and the top center of the bottom plate 503 are both provided with openings, and the side wall of the outer tube 403 passes through the openings. The inner diameter of the openings is larger than the outer diameter of the bottom ring 401, so that the bottom ring 401 and the outer tube 403 pass through the openings from top to bottom and are fixed to the bottom platform 2. The moving wheel 501 and the support rod 502 pass through the through hole 506. At this time, the guide rod 604 passes through the fixing ring 601 and is threadedly connected to the connecting plate 505. Then, the adjusting screw 602 is threadedly connected to the fixing ring 601 and passes through the fixing ring 60 1. At this time, the first nut 603 is screwed into the adjusting screw 602, and then the adjusting screw 602 is passed through the connecting plate 505. At this time, the second nut 603 is screwed into the adjusting screw 602, so that the connecting plate 505 separates the two nuts 603, and the two nuts 603 are rotated so that the two nuts 603 clamp the connecting plate 505, that is, the surfaces of the two nuts 603 and the connecting plate 505 are in contact with each other, and the adjusting screw 602 can still drive the two nuts 603 to rotate with the adjusting screw 602, and the nuts 603 do not clamp the connecting plate 505, so that the connecting plate 505 05 and the adjusting screw 602 can move synchronously, and the reverse operation can be used to disassemble the adjusting mechanism 6 and the moving mechanism 5. At this time, the base 1 is set in the suspended position, and the adjusting screw 602 is rotated. The adjusting screw 602 can vertically pull the connecting plate 505 through the nut 603, and the connecting plate 505 drives the guide rod 604 to move, the connecting plate 505 drives the round rod 504 to move, the round rod 504 drives the bottom plate 503 to move, and the bottom plate 503 drives the support rod 502 to move, thereby driving the vertical movement of the moving wheel 501, thereby adjusting the position of the moving wheel 501, so that the moving wheel 501 can be adjusted. The use and storage effect of the moving wheel 501 is that when the moving wheel 501 is located below the bottom end of the base 1, the base 1 can be easily pushed. When the base 1 is moved to the pre-installation hole at a specified ground location, the moving wheel 501 is stored, that is, when the bottom of the moving wheel 501 is above the bottom end of the base 1, at this time, the limit pin 702 is inserted into the through hole 701 and the pre-installation hole, thereby fixing the base 1 on the ground, achieving the effect of the movable and adjustable base 1, and the lifting mechanism 4 and the base 2 are both located on the base 1, thus achieving the effect of the movable camera 407.

[0039] Reference Figure 1-11 The auxiliary mechanism 8 includes a slide groove 801, a slide rod 802, a first screw rod 803, a mirror 804 and a second screw rod 805. The side walls of the top plate 406 are provided with slide grooves 801. The side walls of the slide groove 801 are slidably connected to the slide rod 802. The side walls of the slide rod 802 are rotatably connected to the second screw rod 805. The side walls of the second screw rod 805 are threadedly connected to the top plate 406. The side walls of the slide rod 802 are threadedly connected to the first screw rod 803. The bottom end of the first screw rod 803 is connected to the mirror 804. The mirrors 804 are located on both sides of the camera 407.

[0040] The first screw 803 is rotated to drive the slide bar 802 to slide in the slide groove 801, thereby driving the second screw 805 to move. The second screw 805 drives the mirror 804 to move to achieve the distance between the mirror 804 and the camera 407. The second screw 805 is rotated to adjust the inclination angle of the mirror 804 to adjust the reflection angle of the mirror 804, thereby better increasing the shooting range of the camera 407. When the mirror is not needed, the second screw 805 only needs to be unscrewed out of the slide bar 802 to remove the mirror 804.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A key area monitoring device during the construction of a trailing suction dredger, comprising a base (1), characterized in that: The upper end of the base (1) is connected to a bottom platform (2), a placement hole (3) is provided at the top of the bottom platform (2), a lifting mechanism (4) is provided on the bottom platform (2), a moving mechanism (5) is installed on the base (1), an adjusting mechanism (6) is installed on the moving mechanism (5), a limiting mechanism (7) is provided on the base (1), and an auxiliary mechanism (8) is installed on the lifting mechanism (4).

2. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 1, characterized in that: The lifting mechanism (4) comprises a bottom ring (401), a screw (402), an outer tube (403), a hydraulic cylinder (404), a push rod (405), a top plate (406) and a camera (407); the hydraulic cylinder (404) is connected inside the placement hole (3); the top end of the base (2) is threadedly connected to the screw (402); the side wall of the screw (402) is threadedly connected to the bottom ring (401); the top end of the bottom ring (401) is connected to the bottom end of the outer tube (403); the hydraulic cylinder (404) is connected inside the placement hole (3); the output end of the hydraulic cylinder (404) is connected to the push rod (405); the top end of the push rod (405) is connected to the top plate (406); and the bottom end of the top plate (406) is connected to the camera (407).

3. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 2, characterized in that: The inner side of the bottom ring (401) is connected to the inner side of the outer tube (403), the inner side of the bottom ring (401) is connected to the inner side of the placement hole (3), the inner diameter of the bottom ring (401) is equal to the inner diameter of the outer tube (403), the top diameter of the placement hole (3) is equal to the inner diameter of the bottom ring (401), the diameter of the hydraulic cylinder (404) is smaller than the diameter of the placement hole (3) of the outer tube (403), and the inner wall of the outer tube (403) is equal to the outer wall of the push rod (405) in sliding contact.

4. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 2, characterized in that: The moving mechanism (5) comprises a moving wheel (501), a support rod (502), a bottom plate (503), a round rod (504), a connecting plate (505) and a through hole (506). The four top corners of the base (1) are each provided with a through hole (506). The support rod (502) is slidably connected in the through hole (506). The bottom end of the support rod (502) is rotatably connected to the moving wheel (501). The top end of the support rod (502) is connected to the bottom plate (503). 3), the top of the bottom plate (503) is connected to four round rods (504) distributed in an array, the top of the round rods (504) is connected to a connecting plate (505), the top center of the connecting plate (505) and the top center of the bottom plate (503) are both provided with openings, the side wall of the outer tube (403) passes through the openings, the inner diameter of the openings is larger than the outer diameter of the bottom ring (401), and the side length of the moving wheel (501) is smaller than the side length of the through hole (506).

5. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 4, characterized in that: The adjusting mechanism (6) comprises a fixing ring (601), an adjusting screw (602), a nut (603) and a guide rod (604); the side wall of the outer tube (403) is connected to the fixing ring (601); one side wall of the fixing ring (601) is threadedly connected to the adjusting screw (602); the side wall of the adjusting screw (602) is threadedly connected to two nuts (603); the connecting plate (505) is located between the two nuts (603); the bottom end of the guide rod (604) is threadedly connected to the connecting plate (505); and the side wall of the guide rod (604) slides through the side wall of the fixing ring (601).

6. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 5, characterized in that: The guide rod (604) is threadedly connected to the connecting plate (505) via a screw hole, and the distance between the fixing ring (601) and the base (1) is greater than the distance between the top of the connecting plate (505) and the bottom of the moving wheel (501).

7. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 1, characterized in that: The limiting mechanism (7) comprises a through hole (701) and a limiting pin (702); a plurality of through holes (701) are provided on the top side wall of the base (1); the limiting pins (702) are inserted and connected in the through holes (701); a pre-installed insertion hole is provided on the ground; the limiting pins (702) are inserted into the pre-installed insertion hole.

8. The key area monitoring device during the construction of a trailing suction hopper dredger according to claim 2, characterized in that: The auxiliary mechanism (8) comprises a slide groove (801), a slide rod (802), a first screw rod (803), a mirror (804) and a second screw rod (805). The side walls of both sides of the top plate (406) are provided with slide grooves (801). The side walls of the slide groove (801) are slidably connected to the slide rod (802). The side walls of the slide rod (802) are rotatably connected to the second screw rod (805). The side walls of the second screw rod (805) are threadedly connected to the top plate (406). The side walls of the slide rod (802) are threadedly connected to the first screw rod (803). The bottom end of the first screw rod (803) is connected to the mirror (804). The mirror (804) is located on both sides of the camera (407).

Images