Axial locking device, bracket assembly and imaging device

Abstract

The present invention relates to an axial locking device, a bracket assembly and a camera device. The axial locking device is sleeved on a tube body. The axial locking device includes a pressing ring and a sliding support sleeved on the tube body, a locking handle arranged between the pressing ring and the sliding support, and an elastic element clamped between the pressing ring, the sliding support and the tube body. The locking handle pushes the pressing ring and the sliding support to move axially relative to each other to squeeze the elastic element, causing the elastic element to deform radially and thus clamping the elastic element on the tube body. When the elastic element is not pressed, the axial locking device is pushed to move axially along the tube body by the locking handle. The axial locking device is hinged to a folding support leg arranged on the tube body and a connecting rod between the tube body and the folding support leg, so that the folding support leg can be unfolded and folded, making the overall structure of the bracket assembly simpler, lighter and more portable, and enabling quick and flexible arrangement.

Description

Technical Field

[0001] The present invention relates to an axial locking device, a bracket assembly and a camera device. Background Art

[0002] Most of the current market products are mobile pan-tilt cameras, which are generally implemented in two ways. One is automatic lifting, and the other is manual lifting. The automatic lifting uses a pneumatic or electric lifting rod to realize the camera layout. The lifting equipment is heavy, weighing dozens of kilograms, and has a large volume, which is not convenient for individual soldiers to carry. The manual bracket assembly usually uses a threaded fit to realize. For example, a liftable and detachable bracket for photographic and video equipment disclosed in Chinese Patent No. 201420238930.6. However, by tightening the screw by hand, the lifting process is long, and the shaking amount of the lifting rod is relatively large, which is not conducive to rapid layout and image recognition of the camera. Summary of the Invention

[0003] The purpose of the present invention is to provide an axial locking device that can realize the flexible arrangement of the bracket assembly.

[0004] To achieve the above purpose, the present invention provides the following technical solution: an axial locking device is sleeved on a tube body; the axial locking device includes a pressing ring and a sliding support sleeved on the tube body, a locking handle disposed between the pressing ring and the sliding support, and an elastic element clamped between the pressing ring, the sliding support and the tube body. The locking handle pushes the pressing ring and the sliding support to move axially relative to each other to squeeze the elastic element so that the elastic element deforms in the radial direction and then the elastic element is clamped on the tube body.

[0005] Further, the locking handle includes a sheet body, a cam groove formed on the sheet body, and a rotating shaft portion disposed on one side of the cam groove. Different gears with different distances to the rotating shaft portion are formed in the cam groove. The rotating shaft portion is rotationally connected to one of the pressing ring and the sliding support, and a driven structure that cooperates with the cam groove and can move in the cam groove is disposed on the other of the pressing ring and the sliding support.

[0006] Further, the locking handle further includes a handle portion extending from the sheet body. The handle portion rotates under the action of an external force to drive the sheet body to rotate around the rotating shaft portion.

[0007] Further, a deformation cavity for accommodating the elastic element is formed between the sliding support and the tube body. One side of the deformation cavity has an opening. The pressing ring covers the opening and partially extends into the deformation cavity and abuts against the elastic element.

[0008] Further, the elastic element includes a contact surface in contact with the tube body, and the contact surface is planar or wavy.

[0009] The present invention also provides a bracket assembly, including a tube body, the above-mentioned axial locking device sleeved on the tube body, and a support seat installed on the axial locking device.

[0010] Further, the support seat includes at least three folding support feet. One end of each folding support foot is hinged to the axial locking device, and the other end is used to abut against the ground. A connecting rod is hinged between each folding support foot and the tube body.

[0011] Further, an outer shell is sleeved on the tube body, and a receiving groove corresponding to the folding support feet is formed on the outer shell to enable the folding support feet to be folded outwards.

[0012] The present invention also provides a camera device, including the above-mentioned bracket assembly and a camera installed on the bracket assembly.

[0013] Further, the tube body includes several sections. An Archimedes spiral locking cam assembly is provided on one of the adjacent two sections of the tube body, and a limiting ring is provided on the other. Among them, the axial locking device is installed on the lowermost section of the tube body, and the camera is installed on the uppermost section of the tube body.

[0014] The beneficial effects of the present invention are as follows: By pushing the locking handle, the pressing ring and the sliding support move relative to each other axially to cause the elastic element to deform radially, thereby realizing the locking of the axial locking device on the tube body. When the elastic element is not pressed, the axial locking device can be moved axially on the tube body by pushing the locking handle; By applying the axial locking device to the bracket assembly, the overall structure of the bracket assembly will be simpler, lighter, more portable, and can be quickly and flexibly arranged; In particular, by combining the axial locking device with the folding support feet provided on the tube body and hinging the tube body and the connecting rod, the unfolding and folding of the folding support feet can be realized.

[0015] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the accompanying drawings to elaborate in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a camera device shown in an embodiment of the present invention;

[0017] Figure 2 is Figure 1 A schematic structural diagram of the camera device after removing the outer shell;

[0018] Figure 3 is Figure 2 an exploded view of a partial imaging device as shown;

[0019] Figure 4 is Figure 2 a sectional view of a partial imaging device as shown;

[0020] Figure 5 is Figure 4 an enlarged view of circle A in

[0021] Figure 6 is Figure 3 a schematic diagram of a partial imaging device with the locking handle in the locked state when folded;

[0022] Figure 7 is Figure 6 an enlarged view of circle A in

[0023] Figure 8 is Figure 3 a schematic diagram of a partial imaging device with the locking handle in the open state when folded;

[0024] Figure 9 is Figure 8 an enlarged view of circle A in Specific Embodiments

[0025] The following further describes in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0026] Please refer to Figure 1 and Figure 2 , the imaging device 100 shown in an embodiment of the present invention includes a bracket assembly 10 and a camera 20 mounted on the bracket assembly 10. The bracket assembly 10 includes a tube body 1, an axial locking device 2 sleeved on the tube body 1, and a support seat 3 mounted on the axial locking device 2. The tube body 1 includes several segments, where the lowermost tube body 1 is called the fixed tube 11, and the others are lifting tubes 12. The lifting tubes 12 can slide relative to each other to realize the movement between the tube bodies 1, so that the camera 20 can be raised or lowered. Specifically, an Archimedes spiral locking cam assembly (not shown) is provided on one of the adjacent two tube bodies 1, and a limit ring 13 is provided on the other. The limit ring can be used to lock between the adjacent two lifting tubes 12 to prevent the lifting tube 12 from being pulled out. The lifting tube 12 is manually raised and can be locked at any position within the stroke, so as to realize the adjustable height of the lifting rod. In this embodiment, the tube body 1 is an aluminum tube. The axial locking device 2 is mounted on the lowermost tube body 1, and the camera 20 is mounted on the uppermost tube body 1.

[0027] Please refer to Figures 3 to 5 As shown in Figures 3 to 5 , the axial locking device 2 includes a pressing ring 121 and a sliding support 122 that are sleeved on the fixed pipe 11 and are in clearance fit with the fixed pipe 11, a locking handle 123 disposed between the pressing ring 121 and the sliding support 122, and an elastic element 124 clamped between the pressing ring 121, the sliding support 122 and the fixed pipe 11. The pressing ring 121 and the sliding support 122 axially abut against the elastic element 124 relative to each other. The locking handle 123 pushes the pressing ring 121 and the sliding support 122 to move axially relative to each other to squeeze the elastic element 124, causing the elastic element 124 to deform radially and thus clamping the elastic element 124 on the fixed pipe 11. It should be noted that when the pressing ring 121 and the sliding support 122 move in the opposite direction axially, when the force exerted on the elastic element 124 by the pressing ring 121 and the sliding support 122 is withdrawn, the elastic element 124 returns to its original state, and there is a clearance fit between the elastic element 124 and the fixed pipe 11. At this time, the axial locking device 2 can slide relative to the fixed pipe 11 axially along the axis of the fixed pipe 11.

[0028] Specifically, the locking handle 123 includes a sheet body 1231, a cam groove 1232 formed on the sheet body 1231, and a rotating shaft portion 1233 disposed on one side of the cam groove 1232. The cam groove 1232 is formed with positions with different distances to the rotating shaft portion 1233. The rotating shaft portion 1233 is rotationally connected to one of the pressing ring 121 and the sliding support 122, and the other of the pressing ring 121 and the sliding support 122 is provided with a driven structure 125 that cooperates with the cam groove 1232 and can move in the cam groove 1232. In this embodiment, the sliding support 122 is provided with a shaft assembly 126 that is rotationally connected to the rotating shaft portion 1233, and the driven structure 125 is disposed on the pressing ring 121. Specifically, the driven structure 125 is a cylinder protruding from the outer circle of the pressing ring 121. A sliding bearing 127 is sleeved on the cylinder 125, and the sliding bearing 127 and the cylinder 125 are fixed by a shaft retaining ring 128. By providing the sliding bearing 127 on the cylinder 125, the movement between the driven structure 125 and the cam groove 1232 is made smoother.

[0029] In this embodiment, a deformation cavity 129 for accommodating the elastic element 124 is formed between the sliding support 122 and the fixed pipe 11. One side of the deformation cavity 129 has an opening (not labeled), and the pressing ring 121 covers the opening and partially extends into the deformation cavity 129 and abuts against the elastic element 124.

[0030] The elastic element 124 is an annular structure. In other embodiments, the elastic element 124 can be a plurality of arc-shaped strip structures with a certain thickness. Of course, the elastic element 124 is preferably an annular rubber ring. Through its annular structure, the elastic element 124 can exert a better clamping force on the fixed tube 11, so that the two are more tightly fixed. The elastic element 124 includes a contact surface 1241 that contacts the fixed tube 11. The contact surface 1241 is flat or wavy, preferably wavy. By setting the contact surface 1241 to be wavy, it is helpful to increase the deformation of the elastic element and indirectly increase the friction.

[0031] Please combine Figure 7 and Figure 9 , two gears with different distances from the rotating shaft 1233 are formed in the cam groove 1232, and the two gears are respectively located at the two ends of the cam groove 1232. In this embodiment, the left end of the cam groove 1232 is set as the first gear 1234, and the right end is set as the second gear 1235. The distance from the second gear 1235 to the rotating shaft 1233 is greater than the distance from the rotating shaft 1233 in the first gear 1234. In this embodiment, the cam groove 1232 is an arc groove. It should be noted that the cam groove 1232 of this embodiment is composed of two-section arc segments, which are divided into a first arc segment (unnumbered) and a second arc segment (unnumbered), and the end point of the first arc segment is the starting point of the second arc segment. With the rotating shaft portion 1233 as the center, the radius of the first arc segment gradually decreases (i.e., the distance from the starting point of the first arc segment to the rotating shaft portion 1233 is greater than the distance from the end point to the rotating shaft portion 1233); similarly, with the rotating shaft portion 1233 as the center, the radius of the second arc segment is the same (i.e., the distance from the starting point of the second arc segment to the rotating shaft portion 1233 is the same as the distance from the end point to the rotating shaft portion 1233). The self-locking of the locking handle 123 can be achieved through the second arc segment. The first gear position 1234 is located at the starting point of the first arc segment, and the second gear position 1235 is from the end point of the first arc segment to the second arc segment. Of course, in other embodiments, the cam groove 1232 can be a diagonal groove.

[0032] In order to make the axial locking device 2 lock more smoothly, the sheet body 1231 includes two symmetrically arranged along the central axis of the sliding support 122. Specifically, the locking handle 123 also includes a handle portion extending from the sheet body 1231, and the handle portion rotates under the action of an external force to drive the sheet body 1231 to rotate around the rotating shaft portion 1233. It should be noted that in actual use, the two sheet bodies 1231 may not necessarily be symmetrically arranged along the central axis of the sliding support 122, and the position arrangement of the two sheet bodies 1231 can be any as long as the force on the clamping ring 121 is symmetrical.

[0033] The handle portion includes a connecting portion 1236 connecting two sheet-like bodies 1231 and an annular portion 1237 formed at one end of the connecting portion 1236. The two sheet-like bodies 1231 are connected by the connecting portion 1236 to facilitate single-handed operation.

[0034] The support base 3 includes three folding support feet 31. In other embodiments, the number of folding support feet 31 can be more than three. Three or more folding support feet 31 are arranged at equal intervals in the circumferential direction of the fixed tube 11. One end of each folding support foot 31 is hinged to the axial locking device 2, and the other end is used to abut against the ground (not shown). Specifically, the folding support foot 31 is hinged to the sliding support 122. A connecting rod 32 is hinged between each folding support foot 31 and the fixed tube 11. The connecting rod 32 and the folding support foot 31 are connected by a pin shaft 33. The position where the pin shaft 33 is connected is the middle position of the folding support foot 31. The connecting rod 32 and the fixed tube 11 are also connected by a pin shaft 33. For the convenience of assembly, a fixed ring 13 is fixedly sleeved on the fixed tube 11. The connecting rod 32 and the fixed ring 13 are connected by a pin shaft 33, so that the connecting rod 32 and the fixed tube 11 are hinged.

[0035] Please refer to again Figure 1 and Figure 2 , a fixed support 14 is also fixedly connected to the bottom end of the fixed tube 11, and a housing 15 is sleeved on the fixed tube 11. A receiving groove 151 corresponding to the folding support foot 31 is formed in the housing 15 to enable the folding support foot 31 to be turned outwards for storage. Through the receiving groove 151, the handle portion can be extended for gripping and applying force. The housing 15 and the fixed tube 11 are connected by a connecting piece 16.

[0036] The above-mentioned imaging device 100 consists of two parts. The first part realizes the height adjustment of the camera 20 by several lifting tubes 12, and the second part realizes the folding of the support frame by the bracket assembly 10. Please refer to Figure 8 and Figure 9, when the handle is rotated to the horizontal position, the sliding bearing 127 is located within the first gear position 1234, the axial distance between the pressing ring 121 and the sliding support 122 (i.e., the distance from the first gear position 1234 to the rotating shaft portion 1233) is the largest, and the gap between the pressing ring 121 and the sliding support 122 is H1. At this time, the elastic element 124 is in its original state, and there is a clearance fit between the pressing ring 121, the sliding support 122, the elastic element 124, and the fixed tube 11. Therefore, the axial locking device 2 can slide up and down relative to the fixed tube 11 (i.e., the axial locking device 2 is in the open state). And because the axial locking device 2 can slide relative to the fixed tube 11, when it slides, and since the middle position of the folding support leg 31 is connected to the fixed tube 11 by the connecting rod 32, when the axial locking device 2 slides downward, the folding support leg 31 unfolds outward through the receiving groove 151, and the unfolding amplitude is related to the sliding distance of the axial locking device 2. When the axial locking device 2 slides upward, the folding support leg 31 retracts. At this time, the folding support leg 31 is received in the receiving groove 151. Please refer to Figure 6 and Figure 7 , when the handle is rotated to the inclined position, the sliding bearing 127 is located within the second gear position 1235, the axial distance between the pressing ring 121 and the sliding support (i.e., the distance from the second gear position 1235 to the rotating shaft portion 1233) is the smallest, and the gap between the pressing ring 121 and the sliding support 122 is H2. At this time, the elastic element 124 is squeezed by the pressing ring 121 and the sliding support 122 (in combination with Figure 5 ), so that the elastic element 124 undergoes a radial deformation within the deformation cavity 129, and the elastic element 124 has a radial locking effect on the fixed tube 11, making the axial locking device 2 immovable relative to the fixed tube 11, achieving locking (i.e., the axial locking device 2 is in the locked state). At this time, the folding support leg 31 cannot be unfolded or retracted.

[0037] When the elastic element 124 of the imaging device 100 is not pressed, the axial locking device 2 is pushed along the axial direction of the fixed tube 11 by the locking handle 123. The axial locking device 2 is hinged to the folding support leg 31 provided on the fixed tube 11 and the connecting rod 32 between the fixed tube 11 and the folding support leg 31, enabling the unfolding and folding of the folding support leg 31, making the overall structure of the bracket assembly simpler, lighter, and more portable, and enabling quick and flexible arrangement, thereby meeting the requirement for rapid deployment of the imaging device 100, being stably placed, reliably load-bearing, suitable for patrol sentries and single-person carrying, and quickly completing monitoring and inspection work in scenarios with a large flow of people such as community entrances and exits, traffic intersections, and shopping malls.

[0038] In addition to realizing the folding or unfolding of the folding support leg 31, in other embodiments, the above-mentioned axial locking device 2 can also be used between two adjacent pipe bodies to realize the connection between the two pipe bodies. If it is used to realize the axial connection between two adjacent pipe bodies, the pressing ring and the sliding support of the axial locking device are respectively connected to the two adjacent pipe bodies.

[0039] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0040] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An axial locking device, characterized in that, it is sleeved on a pipe body; the axial locking device includes a pressing ring and a sliding support sleeved on the pipe body, a locking handle arranged between the pressing ring and the sliding support, and an elastic element clamped between the pressing ring, the sliding support and the pipe body. The locking handle pushes the pressing ring and the sliding support to move relatively axially to squeeze the elastic element, causing the elastic element to deform radially, and further causing the elastic element to be clamped on the pipe body; the pressing ring and the sliding support move in opposite directions axially. When the force applied to the elastic element by the pressing ring and the sliding support is withdrawn, the elastic element has a clearance fit with the fixed pipe, and the axial locking device can slide axially relative to the fixed pipe; a deformation cavity for accommodating the elastic element is formed between the sliding support and the pipe body. One side of the deformation cavity has an opening, and the pressing ring covers the opening and partially extends into the deformation cavity and abuts against the elastic element.

2. The axial locking device according to claim 1, characterized in that, the locking handle includes a sheet body, a cam groove formed on the sheet body, and a rotating shaft portion arranged on one side of the cam groove. Different gears with different distances to the rotating shaft portion are formed in the cam groove. The rotating shaft portion is rotatably connected to one of the pressing ring and the sliding support, and a driven structure that cooperates with the cam groove and can move in the cam groove is arranged on the other of the pressing ring and the sliding support.

3. The axial locking device according to claim 2, characterized in that, the locking handle further includes a handle portion extending from the sheet body. The handle portion rotates under the action of an external force to drive the sheet body to rotate around the rotating shaft portion.

4. The axial locking device according to claim 1, characterized in that, the elastic element has an annular structure, and the elastic element includes a contact surface in contact with the pipe body, and the contact surface is flat or wavy.

5. A bracket assembly, characterized in that, it includes a pipe body, the axial locking device according to any one of claims 1 to 4 sleeved on the pipe body, and a support seat installed on the axial locking device.

6. The bracket assembly according to claim 5, characterized in that, the support seat includes at least three folding support feet. One end of each folding support foot is hinged to the axial locking device or the sliding support, and the other end is used to abut against the ground. A connecting rod is hinged between each folding support foot and the pipe body.

7. The bracket assembly according to claim 6, characterized in that, a housing is sleeved outside the pipe body, and a storage groove corresponding to the folding support feet is formed on the housing to enable the folding support feet to be turned outwards; a fixed support is also fixedly connected to the bottom end of the pipe body.

8. A camera device, characterized in that, it includes the bracket assembly according to any one of claims 5 to 7 and a camera installed on the bracket assembly.

9. The camera device according to claim 8, characterized in that, The tube body includes several segments. An Archimedes spiral locking cam assembly is provided on one of the adjacent two segments, and a limiting ring is provided on the other. Among them, the axial locking device is installed on the lowermost tube body, and the camera is installed on the uppermost tube body.

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