Camera mounting bracket and defective cloth detection system of circular knitting machine

Abstract

When a needle cylinder mechanism at the bottom of a circular weft knitting machine is replaced, a fixing rod is adjusted upwards through a first adjusting mechanism, so that the fixing rod, a positioning piece, a camera assembly and other components move upwards, space is reserved to facilitate replacement of the needle cylinder mechanism, and after the needle cylinder mechanism is replaced, the camera assembly is installed on the fixing rod. After the fixing rod is adjusted downwards through the first adjusting mechanism, the positioning piece is matched with the mounting frame or the first adjusting mechanism, so that the relative position of the fixing rod and the mounting frame is restored, the position of the camera assembly does not need to be adjusted, the industrial camera does not need to be debugged again, and the production switching efficiency of the circular knitting machine is greatly improved. The utility model discloses a mechanism capable of cleaning a camera lens in a full-automatic mode, which enables acquired images to be kept clear, effectively improves quality of produced cloth, avoids various problems generated in the dust removal operation process of workers, and improves production efficiency. The defective cloth detection device can be applied to the field of defective cloth detection systems of circular knitting machines.

Description

Technical Field

[0001] The utility model relates to the field of a circular knitting machine defect detection system, in particular to a camera mounting bracket and a circular knitting machine defect detection system. Background Art

[0002] The defective fabric detection system is one of the applications of computer vision systems in the textile industry. It is a system that automatically detects fabric defects during fabric weaving or grey fabric inspection. At present, the industrial camera of the defective fabric detection system is installed on the circular knitting machine through a camera mounting bracket. The industrial camera takes images of the fabrics woven by the circular knitting machine. However, due to the problem of yarn hair flying everywhere in the production environment, the camera lens is easily stuck with yarn hair, which affects the clarity of the acquired image and causes misjudgment of defective fabric points. At the same time, when the circular knitting machine switches to produce different fabrics and replaces the needle cylinder, it is necessary to remove the camera mounting bracket to make room for replacing the needle cylinder. After re-fixing the camera mounting bracket, the lens position of the industrial camera will be offset. The position of the industrial camera must be readjusted and re-debugged, which greatly reduces the efficiency of the circular knitting machine. Utility Model Content

[0003] The utility model aims to provide a camera mounting bracket and a circular knitting machine defect detection system to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] A camera mounting bracket, comprising:

[0006] Mounting frame;

[0007] Fixed rod;

[0008] A first adjustment mechanism, connected to the mounting frame and the fixing rod, the first adjustment mechanism adjusting the vertical position of the fixing rod relative to the mounting frame or adjusting the angle of rotation of the fixing rod around the vertical axis;

[0009] a positioning member, which is detachably connected to the fixing rod, and when the positioning member is matched with the mounting frame or the first adjustment mechanism, the position of the mounting frame relative to the fixing rod is fixed;

[0010] A camera assembly is connected to the fixing rod.

[0011] The beneficial effects of the utility model are as follows: the vertical position of the fixed rod is adjusted by the first adjusting mechanism, and the angle of rotation of the fixed rod around the vertical axis can be adjusted, thereby adjusting the position of the camera assembly. When the industrial camera can take clear images and determine the position, a positioning piece is installed relative to the fixed rod, so that the positioning piece cooperates with the mounting frame or the first adjusting mechanism, thereby fixing the position of the fixed rod relative to the mounting frame; when the needle cylinder mechanism at the bottom of the circular knitting machine is replaced, the fixed rod is adjusted upward by the first adjusting mechanism, so that the fixed rod, the positioning piece, the camera assembly and other components are moved upward, thereby making room for replacing the needle cylinder mechanism. After the needle cylinder mechanism is replaced, since the relative position of the positioning piece and the fixed rod is fixed, after the fixed rod is adjusted downward by the first adjusting mechanism, the positioning piece is used to cooperate with the mounting frame or the first adjusting mechanism, so that the relative position of the fixed rod and the mounting frame is restored to its original state, thereby eliminating the need to adjust the position of the camera assembly and the need to re-debug the industrial camera, thereby greatly improving the conversion efficiency of the circular knitting machine.

[0012] As a further improvement of the above technical solution, the positioning member rotates around the vertical axis or slides along the vertical direction relative to the fixing rod, and the camera mounting bracket further includes:

[0013] A locking member is connected to the positioning member and the fixing rod, and is locked to fix the position of the positioning member.

[0014] As a further improvement of the above technical solution, the mounting frame is provided with a positioning plate extending in the vertical direction, and the positioning member abuts against the positioning plate to fix the position of the mounting frame relative to the fixing rod.

[0015] As a further improvement of the above technical solution, the mounting frame includes:

[0016] The clamping mechanism is connected to the bottom of the positioning plate, and the clamping mechanism is provided with a horizontally penetrating clamping hole.

[0017] As a further improvement of the above technical solution, the camera mounting bracket further includes:

[0018] A dust cover, which is arranged on the top of the camera assembly, and the dust cover extends in a direction directly opposite to the camera assembly;

[0019] An air blowing nozzle is arranged on the dust cover, and the air blowing nozzle faces downward.

[0020] The air blowing nozzle is facing the lens of the camera assembly. The air blown out by the air blowing nozzle is in a downward-scattering cone shape, which can cover the entire lens of the camera assembly, ensuring that the defective cloth system obtains clear images. The air blowing is controlled by the host of the defective cloth system. When the system detects that there is dust or yarn hair on the lens of the camera assembly, the system issues a command to blow air, thereby keeping the image clear.

[0021] As a further improvement of the above technical solution, a rounded transition is provided at the edge of the dust cover.

[0022] As a further improvement of the above technical solution, the camera mounting bracket also includes a second adjustment mechanism, which connects the fixing rod and the camera assembly, and the second adjustment mechanism adjusts the horizontal position of the camera assembly or adjusts the rotation angle of the camera assembly around the horizontal axis.

[0023] As a further improvement of the above technical solution, the fixing rod includes a vertical portion and an inclined portion connected in sequence from top to bottom, the vertical portion is detachably connected to the first adjustment mechanism and the positioning member, with the direction directly opposite the camera assembly as the relative front direction, the inclined portion gradually tilts backward from top to bottom, and the inclined portion is connected to the camera assembly.

[0024] As a further improvement of the above technical solution, the camera mounting bracket further includes:

[0025] The distance-fixing mechanism is rotatably connected to the fixing rod, and after the distance-fixing mechanism rotates, it extends in front of the camera assembly or is recovered to the rear of the camera assembly.

[0026] A circular knitting machine defect detection system comprises the camera mounting bracket as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0028] Figure 1 This is a structural schematic diagram of an embodiment of the camera mounting bracket provided by the utility model;

[0029] Figure 2 This is a structural schematic diagram of another angle of one embodiment of the camera mounting bracket provided by the utility model;

[0030] Figure 3 This is an exploded schematic diagram of an embodiment of the camera mounting bracket provided by the utility model;

[0031] Figure 4 This is an exploded schematic diagram of another angle of one embodiment of the camera mounting bracket provided by the utility model.

[0032] 100. Mounting frame, 110. Positioning plate, 120. Clamping mechanism, 121. Clamping hole, 200. Fixing rod, 210. Vertical portion, 220. Inclined portion, 230. Horizontal portion, 300. First adjusting mechanism, 400. Positioning member, 401. First positioning surface, 402. Positioning block, 403. Second positioning surface, 410. Locking member, 500. Camera assembly, 600. Dust cover, 700. Blowing nozzle, 800. Second adjusting mechanism, 900. Distance mechanism. DETAILED DESCRIPTION

[0033] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present utility model, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood to exclude the number, and above, below, within, etc. are understood to include the number.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 4 The camera mounting bracket of the present utility model is provided in the following embodiments:

[0038] The camera mounting bracket includes a mounting frame 100 , a fixing rod 200 , a first adjustment mechanism 300 , a positioning member 400 , and a camera assembly 500 .

[0039] The mounting frame 100 is used to be installed on the crossbeam of the circular knitting machine, the first adjustment mechanism 300 is connected to the mounting frame 100 , the fixing rod 200 is connected to the first adjustment mechanism 300 , and the camera assembly 500 is installed on the fixing rod 200 .

[0040] The first adjustment mechanism 300 adjusts the vertical position of the fixing rod 200 relative to the mounting bracket 100 , and the first adjustment mechanism 300 can adjust the angle of rotation of the fixing rod 200 relative to the mounting bracket 100 around the vertical axis.

[0041] For example, the first adjustment mechanism 300 includes a linear drive mechanism and a rotation drive mechanism. The linear drive mechanism is connected to the mounting frame 100, the linear drive mechanism is connected to the rotation drive mechanism, the rotation drive mechanism is connected to the fixed rod 200, the linear drive mechanism drives the rotation drive mechanism to move in the up and down directions, and the rotation drive mechanism drives the fixed rod 200 to rotate around the vertical axis.

[0042] In this embodiment, the first adjustment mechanism 300 includes a first adjustment block and a first fastening screw. The first adjustment block is provided with a first adjustment hole extending vertically. The side wall of the first adjustment hole is provided with a first adjustment groove extending vertically. The first adjustment groove extends vertically through the first adjustment block. A first screw hole and a first connecting hole are respectively provided on both sides of the first adjustment groove.

[0043] The fixing rod 200 is inserted into the first adjustment hole, and the first fastening screw passes through the first connecting hole and is screwed into the first screw hole. Loosening the first fastening screw allows the fixing rod 200 to rotate around the vertical axis or slide up and down in the first adjustment hole. Locking the first fastening screw fixes the position of the fixing rod 200.

[0044] The positioning member 400 is detachably connected to the fixing rod 200. After the first adjustment mechanism 300 adjusts the position of the fixing rod 200 relative to the mounting frame 100, the positioning member 400 is installed on the fixing rod 200. The positioning member 400 is abutted against the first adjustment mechanism 300 or the mounting frame 100, thereby fixing the position of the fixing rod 200 relative to the mounting frame 100.

[0045] The vertical position of the fixing rod 200 is adjusted by the first adjusting mechanism 300, and the rotation angle of the fixing rod 200 around the vertical axis can be adjusted, thereby adjusting the position of the camera assembly 500. When the industrial camera is able to capture a clear image and determine the position, the positioning member 400 is installed relative to the fixing rod 200 so that the positioning member 400 abuts against the mounting frame 100 or the first adjusting mechanism 300, thereby fixing the position of the fixing rod 200 relative to the mounting frame 100.

[0046] When the needle cylinder mechanism at the bottom of the circular knitting machine is replaced, the fixing rod 200 is adjusted upward through the first adjustment mechanism 300, so that the fixing rod 200, the positioning member 400, the camera assembly 500 and other components are moved upward, thereby making room for replacing the needle cylinder mechanism.

[0047] After the syringe mechanism is replaced, since the relative positions of the positioning member 400 and the fixed rod 200 are fixed, after the fixed rod 200 is adjusted downward by the first adjustment mechanism 300, the positioning member 400 is used to abut against the mounting frame 100, so that the relative positions of the fixed rod 200 and the mounting frame 100 are restored to their original state. There is no need to adjust the position of the camera assembly 500, and there is no need to re-debug the industrial camera, which greatly improves the conversion efficiency of the circular knitting machine.

[0048] In some embodiments, the positioning member 400 is movably connected to the fixed rod 200. The positioning member 400 can rotate around the vertical axis relative to the fixed rod 200. The positioning member 400 can also slide in the up and down directions relative to the fixed rod 200. The camera mounting bracket is also provided with a locking member 410. The locking member 410 connects the fixed rod 200 and the positioning member 400. Locking the locking member 410 fixes the position of the positioning member 400 relative to the fixed rod 200.

[0049] Loosening the locking piece 410 allows the positioning piece 400 to adjust its position relative to the fixing rod 200, so that the positioning piece 400 can abut against the first adjustment mechanism 300 or the mounting frame 100 after the position is adjusted, and the relative position relationship between the mounting frame 100 and the fixing rod 200 is transferred to the positioning piece 400. Then, the locking piece 410 is locked to fix the position of the positioning piece 400, so that the relative position of the positioning piece 400 and the fixing rod 200 is fixed, ensuring that the relative position relationship between the mounting frame 100 and the fixing rod 200 is accurate and effective.

[0050] In some embodiments, the bottom surface of the positioning member 400 is configured as a first positioning surface 401 , and a positioning block 402 is disposed at the bottom of the positioning member 400 , and one of the side walls of the positioning block 402 is configured as a second positioning surface 403 .

[0051] The mounting frame 100 is provided with a positioning plate 110, which extends in the up-down direction. The top surface of the positioning plate 110 abuts against the first positioning surface 401 of the positioning member 400, and the side wall of the positioning plate 110 abuts against the second positioning surface 403 of the positioning member 400, thereby fixing the position of the mounting frame 100 relative to the fixing rod 200.

[0052] The positioning plate 110 of the mounting frame 100 is limited by the positioning member 400 and the positioning block 402, thereby limiting the freedom of the fixing rod 200 to rotate around the vertical axis relative to the mounting frame 100, and limiting the freedom of the fixing rod 200 to move downward relative to the mounting frame 100, so that the fixing rod 200 can be accurately positioned when returning to its original position, thereby avoiding position or angle deviation of the camera assembly 500.

[0053] In some embodiments, a clamping mechanism 120 is provided at the bottom of the mounting frame 100, the clamping mechanism 120 is installed at the bottom of the positioning plate 110, and the clamping mechanism 120 is provided with a clamping hole 121 for clamping the circular knitting machine beam, and the clamping hole 121 is through in the front-to-back direction.

[0054] For example, the clamping mechanism 120 includes an upper clamping plate, a lower clamping plate, a locking screw, and a tightening screw. The lower clamping plate is connected to the bottom end of the positioning plate 110, the upper clamping plate is connected to the lower section of the positioning plate 110, the upper clamping plate and the lower clamping plate are arranged at intervals, and a clamping hole 121 is formed between the upper clamping plate and the lower clamping plate. A screw hole that penetrates from top to bottom is set on the upper clamping plate or the lower clamping plate, and the locking screw is screwed into the screw hole. The end of the upper clamping plate and the end of the lower clamping plate are respectively provided with a through tightening screw hole and a tightening connection hole, and the tightening screw is screwed into the tightening screw hole after passing through the tightening connection hole.

[0055] When in use, remove the tightening screw, put the clamping hole 121 between the upper clamp and the lower clamp on the crossbeam of the circular knitting machine, and then adjust the position of the clamping mechanism 120 to make the camera assembly 500 close to the fabric. After the position of the camera assembly 500 is roughly determined, pass the tightening screw through the tightening connection hole and screw it into the tightening screw hole. Finally, screw the locking screw into the screw hole and abut against the crossbeam of the circular knitting machine to fix the position of the clamping mechanism 120 and prevent the clamping mechanism 120 from loosening and causing the mounting frame 100 to be displaced.

[0056] The clamping mechanism 120 at the bottom of the positioning plate 110 is used to clamp the crossbeam of the circular knitting machine. When the needle cylinder mechanism at the bottom of the circular knitting machine needs to be replaced, the positioning plate 110 extends above the crossbeam of the circular knitting machine to avoid occupying the replacement space of the needle cylinder mechanism.

[0057] After adjusting the fixing rod 200 to move upward through the first adjustment mechanism 300, the upward movement of the camera assembly 500 is not affected by the positioning plate 110, and the camera assembly 500 can move upward more closely to the clamping mechanism 120 and the crossbeam to further increase the replacement space of the syringe mechanism.

[0058] In some embodiments, the camera mounting bracket is also provided with a dust cover 600 and an air blowing nozzle 700. The dust cover 600 is installed on the top of the camera assembly 500. The direction facing the camera assembly 500 is the front direction. The dust cover 600 extends in the forward direction. The air blowing nozzle 700 is set on the dust cover 600, and the air blowing nozzle 700 blows out gas downward to facilitate the blowing and cleaning of the lens of the camera assembly 500.

[0059] The dust cover 600 can reduce the cloth scraps generated when the circular knitting machine is working and fall into the lens of the camera assembly 500, while the air nozzle 700 blows and cleans the lens of the camera assembly 500 to prevent the lens from being blocked by the cloth scraps.

[0060] In some embodiments, the front edge of the dust cover 600 is configured to have a rounded transition.

[0061] During the process of weaving fabric on the circular knitting machine, the fabric may come into contact with the dust cover 600 , and the rounded transition on the front side of the dust cover 600 helps to prevent the dust cover 600 from scratching the fabric.

[0062] In some embodiments, the camera mounting bracket is also provided with a second adjustment mechanism 800, which connects the fixed rod 200 and the camera assembly 500. The second adjustment mechanism 800 can adjust the horizontal position of the camera assembly 500 relative to the fixed rod 200. The second adjustment mechanism 800 can also adjust the angle of rotation of the camera assembly 500 relative to the fixed rod 200 around the horizontal axis.

[0063] For example, the second adjustment mechanism 800 includes a linear drive mechanism and a rotation drive mechanism. The linear drive mechanism is connected to the fixed rod 200, the linear drive mechanism is connected to the rotation drive mechanism, the rotation drive mechanism is connected to the camera assembly 500, the linear drive mechanism drives the rotation drive mechanism to move in the left and right directions, and the rotation drive mechanism drives the camera assembly 500 to rotate around an axis extending along the left and right directions.

[0064] In this embodiment, the second adjustment mechanism 800 includes a second adjustment block and a second fastening screw. The second adjustment block is provided with a second adjustment hole extending in the left-right direction. The rear side wall of the second adjustment hole is provided with a second adjustment groove extending backward. The second adjustment groove extends through the second adjustment block in the left-right direction. Second connecting holes and second screw holes are respectively provided on the upper and lower sides of the second adjustment groove. The fixing rod 200 is passed through the second adjustment hole. The second fastening screw passes through the second connecting hole and is screwed into the second screw hole. Loosening the second fastening screw allows the fixing rod 200 to rotate or slide left and right in the second adjustment hole around an axis extending in the left-right direction. Tightening the second fastening screw fixes the position of the fixing rod 200 relative to the camera assembly 500.

[0065] In some embodiments, the fixed rod 200 includes a vertical portion 210, an inclined portion 220, and a horizontal portion 230. The vertical portion 210 extends in the up-down direction, the bottom end of the vertical portion 210 is connected to the inclined portion 220, the inclined portion 220 extends in the up-down direction, the inclined portion 220 gradually tilts backward from top to bottom, and the horizontal portion 230 extends in the left-right direction, and the horizontal portion 230 is connected to the camera assembly 500.

[0066] The vertical portion 210 is connected to the first adjustment mechanism 300 and the positioning member 400. The first adjustment mechanism 300 is used to adjust the position of the vertical portion 210 in the up and down directions and change the angle of the fixing rod 200 around the vertical axis, thereby changing the position of the inclined portion 220, the horizontal portion 230 and the camera assembly 500 relative to the first adjustment mechanism 300.

[0067] Furthermore, the inclined portion 220 is inclined backwards, so that the lower section of the fixing rod 200 and the camera assembly 500 are away from the fabric knitted by the circular knitting machine, thereby preventing the lower section of the fixing rod 200 or the camera assembly 500 from scratching the fabric.

[0068] In some embodiments, the camera mounting bracket is also provided with a distance mechanism 900, which is rotatably connected to the fixed rod 200; when the distance mechanism 900 is rotated to the front of the camera assembly 500, the position of the fixed rod 200 or the mounting frame 100 is adjusted so that the fabric woven by the circular knitting machine is against the front end of the distance mechanism 900, ensuring that the distance between the fabric and the camera assembly 500 meets the requirements of the industrial camera; after determining the distance between the fabric and the camera assembly 500, the distance mechanism 900 is rotated to the rear of the camera assembly 500 to prevent the distance mechanism 900 from scratching the fabric.

[0069] The utility model also discloses a circular knitting machine defect detection system, comprising the camera mounting bracket as mentioned above.

[0070] When the needle cylinder mechanism at the bottom of the circular knitting machine is replaced, the fixing rod 200 is adjusted upward through the first adjustment mechanism 300, so that the fixing rod 200, the positioning member 400, the camera assembly 500 and other components are moved upward, thereby making room for replacing the needle cylinder mechanism.

[0071] After the syringe mechanism is replaced, since the relative positions of the positioning member 400 and the fixed rod 200 are fixed, after the fixed rod 200 is adjusted downward by the first adjustment mechanism 300, the positioning member 400 is used to abut against the mounting frame 100, so that the relative positions of the fixed rod 200 and the mounting frame 100 are restored to their original state. There is no need to adjust the position of the camera assembly 500, and there is no need to re-debug the industrial camera, which greatly improves the conversion efficiency of the circular knitting machine.

[0072] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A camera mounting bracket, characterized in that: include: Mounting frame; Fixed rod; A first adjustment mechanism, connected to the mounting frame and the fixing rod, the first adjustment mechanism adjusting the vertical position of the fixing rod relative to the mounting frame or adjusting the angle of rotation of the fixing rod around the vertical axis; a positioning member, which is detachably connected to the fixing rod, and when the positioning member is matched with the mounting frame or the first adjustment mechanism, the position of the mounting frame relative to the fixing rod is fixed; A camera assembly is connected to the fixing rod.

2. The camera mounting bracket according to claim 1, characterized in that: The positioning member rotates around a vertical axis or slides along a vertical direction relative to the fixing rod, and the camera mounting bracket further includes: A locking member is connected to the positioning member and the fixing rod, and is locked to fix the position of the positioning member.

3. The camera mounting bracket according to claim 2, characterized in that: The mounting frame is provided with a positioning plate extending in a vertical direction, and the positioning member abuts against the positioning plate to fix the position of the mounting frame relative to the fixing rod.

4. The camera mounting bracket according to claim 3, characterized in that: The mounting frame comprises: The clamping mechanism is connected to the bottom of the positioning plate, and the clamping mechanism is provided with a horizontally penetrating clamping hole.

5. The camera mounting bracket according to claim 1, characterized in that: The camera mounting bracket also includes: A dust cover, which is arranged on the top of the camera assembly, and the dust cover extends in a direction directly opposite to the camera assembly; An air blowing nozzle is arranged on the dust cover, and the air blowing nozzle faces downward.

6. The camera mounting bracket according to claim 5, characterized in that: The edge of the dust cover is provided with a rounded transition.

7. The camera mounting bracket according to claim 1, characterized in that: The camera mounting bracket also includes a second adjustment mechanism, which connects the fixing rod and the camera assembly, and the second adjustment mechanism adjusts the horizontal position of the camera assembly or adjusts the angle of rotation of the camera assembly around a horizontal axis.

8. The camera mounting bracket according to claim 1, characterized in that: The fixing rod includes a vertical portion and an inclined portion which are connected in sequence from top to bottom. The vertical portion is detachably connected to the first adjustment mechanism and the positioning member. The direction facing the camera assembly is the relative front direction. The inclined portion gradually tilts backward from top to bottom, and the inclined portion is connected to the camera assembly.

9. The camera mounting bracket according to claim 1, characterized in that: The camera mounting bracket also includes: The distance-fixing mechanism is rotatably connected to the fixing rod, and after the distance-fixing mechanism rotates, it extends in front of the camera assembly or is recovered to the rear of the camera assembly.

10. A circular knitting machine defect detection system, characterized in that: Comprising a camera mounting bracket as claimed in any one of claims 1 to 9.

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