A fixed distance tracking device

Abstract

The present invention belongs to the technical field of film and television shooting equipment. Specifically, the present invention relates to a fixed-distance tracking device, including a supporting platform and a distance frame; the supporting platform is used to install the shooting instrument; one end of the distance frame is connected to the supporting platform and the follower, and the other end is used to be connected to the actor to maintain a predetermined distance between the actor and the follower. The fixed-distance tracking device of the present invention is used to assist in the shooting of the follower shot. During shooting, one or more followers can share the weight of the actor. The preset constant distance between the actor and the shooting instrument can be achieved by the distance frame, and the overall load of the shooting instrument and the fixed-distance tracking device is shared by the actor and the follower. Moreover, the supporting platform and the follower are located at the same end of the distance frame, so that most of the weight of the overall load is borne by the follower, thereby reducing the physical exertion of the actor during shooting, making shooting more humane, reducing the number of breaks for the actor, and speeding up the shooting progress.

Description

Technical Field

[0001] The present invention belongs to the technical field of film and television shooting equipment, and in particular, relates to a fixed-distance tracking device. Background Art

[0002] In film and television productions, especially those featuring gunfights, tracking shots are common. During these shots, the camera and actors need to move in sync. In practice, to ensure a consistent tracking effect, the actors and camera must maintain a constant distance during filming.

[0003] Existing tracking solutions all put the weight of the camera and shooting equipment on the actors, who then carry them on their backs for filming. For example, in the patent document with application number 202022765322.9, application date November 25, 2020, and invention name "Wearable Film and Television Shooting Selfie Stand", a wearable film and television shooting selfie stand is disclosed, including a telescopic frame assembly and a telescopic arm assembly, the telescopic frame assembly and the telescopic arm assembly are respectively rotatably connected to the wearable device, and the end of the telescopic arm assembly is coaxially locked with the telescopic frame assembly; a camera bracket is installed on the telescopic frame assembly, and the telescopic frame assembly and the telescopic arm assembly are respectively rotatably connected to the vest, and the end of the telescopic arm assembly is coaxially locked with the telescopic frame assembly, and the pitch angle of the vest and the telescopic frame assembly can be adjusted according to the user's shooting needs; the camera is installed on the camera bracket and can move synchronously with the user to shoot the user; in addition, a clamp joint is also designed, and the distance between adjacent sleeves, adjacent struts, and adjacent telescopic arms can be adjusted by sliding the clamp joint on connecting rod I and connecting rod II to meet the body shapes of different users.

[0004] Although the wearable film and television shooting selfie stand disclosed in the above-mentioned patent document can ensure that the camera and the actor move synchronously during shooting, a common problem of existing shooting solutions is that the weight of the camera and shooting equipment is loaded on the actor, and the actor consumes a lot of physical energy when shooting with the weight, which is not only inhumane but also affects the shooting progress. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a fixed-distance tracking device, and its technical solution is as follows:

[0006] A fixed-distance tracking device comprises a supporting platform and a distance frame; the supporting platform is used to mount a shooting instrument; one end of the distance frame is connected to the supporting platform and the shooter, and the other end is used to be connected to the actor to maintain a predetermined distance between the actor and the shooting instrument.

[0007] The fixed-distance tracking device as described above is further preferably: the fixed-distance frame includes an articulated seat, a first distance tube, a second distance tube and a fixed frame; the articulated seat is used to connect with the actor, and one end of the first distance tube is installed on the articulated seat; one end of the second distance tube is hingedly connected to the articulated seat, and the second distance tube forms an adjustable angle with the first distance tube; one end of the fixed frame is connected to the first distance tube and the other end is connected to the second distance tube, and is used to fix the adjusted angle between the first distance tube and the second distance tube; the other end of the second distance tube is installed with the supporting platform, and the other end of the first distance tube is used to connect with the follower.

[0008] The fixed-distance tracking device as described above is further preferably: the first fixed-distance tube includes a first fixed-distance section and a second fixed-distance section; the second fixed-distance section is located in the first fixed-distance section and slides with the first fixed-distance section; the first fixed-distance section is provided with a first sliding groove along the length direction, and the second fixed-distance section is provided with a first slider, and the first slider slides with the first sliding groove; the first slider is provided with a first fastener for calibrating and limiting the extended length of the second fixed-distance section.

[0009] The fixed-distance tracking device as described above is further preferably: the second fixed-distance tube includes a third fixed-distance segment and a fourth fixed-distance segment; the fourth fixed-distance segment is located in the third fixed-distance segment and slides with the third fixed-distance segment; the third fixed-distance segment is provided with a second sliding groove along the length direction, and the fourth fixed-distance segment is provided with a second slider, and the second slider slides with the second sliding groove; the second slider is provided with a second fastener for calibrating and limiting the extended length of the fourth fixed-distance segment.

[0010] The fixed-distance tracking device as described above is further preferably: the first fixed-distance segment is provided with a first slot at the end connected to the second fixed-distance segment, and the length direction of the first slot is the same as the length direction of the first fixed-distance segment; a first fastening ring is provided outside the first slot, and the first fastening ring surrounds the outer side of the circumference of the first fixed-distance segment for adjusting the opening width of the first slot.

[0011] The fixed-distance tracking device as described above is further preferably configured such that: the third fixed-distance segment is provided with a second slot at the end connected to the fourth fixed-distance segment, and the length direction of the second slot is the same as the length direction of the third fixed-distance segment; a second fastening ring is provided outside the second slot, and the second fastening ring surrounds the outer side of the circumference of the third fixed-distance segment for adjusting the opening width of the second slot.

[0012] The fixed-distance tracking device as described above is further preferably: the fixed frame includes a first fixed rod and a second fixed rod; the first fixed rod is hingedly connected to the first fastening ring, the second fixed rod is hingedly connected to the second fastening ring, and the first fixed rod and the second fixed rod are slidably matched; a fastening button is provided on the first fixed rod, which is used to limit the sliding between the first fixed rod and the second fixed rod.

[0013] The fixed-distance tracking device as described above is further preferably configured such that: the first fixed-distance tube and the second fixed-distance tube are hollowed out on their circumferential surfaces.

[0014] The fixed-distance tracking device as described above is further preferably configured such that: a cross section of the first distance tube perpendicular to the length direction and a cross section of the second distance tube perpendicular to the length direction are both rectangular.

[0015] The fixed-distance tracking device as described above is further preferably configured such that: the width of the second fixed-distance tube is not less than the width of the supporting platform.

[0016] The fixed-distance tracking device as described above is further preferably configured such that: the first distance tube is provided with a handrail at one end connected to the person following the shooting, the handrail being U-shaped and connected to the first distance tube at the center of symmetry.

[0017] The fixed-distance tracking device as described above is further preferably: one end of the supporting platform is hingedly connected to the fixed-distance frame, and the other end is connected to the fixed-distance frame through a sliding support rod; a fastening bolt is provided on the fixed-distance frame, and the sliding support rod is hingedly connected to the supporting platform at one end and slidingly cooperates with the fastening bolt at the other end, and the fastening bolt is used to limit the sliding of the sliding support rod.

[0018] The fixed-distance tracking device as described above is further preferably configured such that: a mounting position is provided on the supporting platform, and the mounting position includes a mounting hole and a mounting slot for mounting a shooting instrument.

[0019] The fixed-distance tracking device as described above is further preferably further configured to include a connecting frame connected to the hinged seat; the connecting frame includes a connecting block and a connecting plate, the connecting block and the connecting plate being configured to be placed on both sides of a wearable article and connected through the wearable article to clamp the wearable article.

[0020] The fixed-distance tracking device as described above is further preferably configured such that: the connecting plate is provided with mounting holes, and the mounting holes are multiple and are used for reducing weight and providing mounting locations for shooting instruments.

[0021] The fixed-distance tracking device as described above is further preferably configured such that: the connecting plate is provided with a plurality of hollow holes for reducing weight.

[0022] The fixed-distance tracking device as described above is further preferably: the connecting frame is connected to the articulated seat via an adapter frame; the adapter frame includes a support ear and an adapter block; the support ears are arranged in pairs, mounted on the connecting plate, and located on both sides of the adapter block; the adapter block is provided with a first adapter hole and a second adapter hole, and the axis of the first adapter hole is perpendicular to the axis of the second adapter hole; the adapter block is hingedly connected to the support ear through the first adapter hole, and is hingedly connected to the articulated seat through the second adapter hole.

[0023] Analysis shows that, compared with the prior art, the advantages and beneficial effects of the present invention are:

[0024] The fixed-distance tracking device of the present invention is used to assist in tracking shots. During filming, one or more tracking operators can share the actor's load. A preset constant distance between the actor and the camera is maintained by a distance frame. The combined load of the camera and the fixed-distance tracking device is shared by the actor and the tracking operator. Furthermore, the support platform and the tracking operator are located at the same end of the distance frame, so the majority of the overall load is borne by the tracking operator. This reduces the actor's physical exertion during filming, making filming more user-friendly, reducing the actor's rest periods, and accelerating filming progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the fixed-distance tracking device of the present invention.

[0026] Figure 2 for Figure 1 A partial enlarged view of point A.

[0027] Figure 3 for Figure 1 A partial enlarged view at point B.

[0028] In the figure: 1-bearing platform; 2-sliding support rod; 3-fourth distance section; 4-third distance section; 5-second slide; 6-connecting plate; 7-first slide; 8-first distance section; 9-second distance section; 10-handrail; 11-second fastening ring; 12-first fastening ring; 13-second fixing rod; 14-first fixing rod; 15-support ear; 16-adapter block; 17-hinge seat. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0031] Please refer to Figures 1 to 3 ,in, Figure 1 Schematic diagram of the structure of the fixed-distance tracking device of the present invention;

[0032] Figure 2 for Figure 1 A local enlarged view at point A; Figure 3 for Figure 1 A partial enlarged view at point B.

[0033] The present invention provides a fixed-distance tracking device, which mainly includes a supporting platform 1 and a distance frame. During use, the supporting platform 1 is used to mount a camera; one end of the distance frame is connected to the supporting platform 1 and is used to connect to the person following the camera, while the other end of the distance frame is used to connect to the actor, thereby maintaining a predetermined distance between the actor and the camera through the distance frame.

[0034] The fixed-distance tracking device of the present invention is used to assist in the shooting of tracking shots. During shooting, one or more followers can share the weight of the actor. Specifically, a shooting instrument is mounted on the supporting platform 1, the supporting platform 1 is mounted on one end of the fixed-distance frame, and the other end of the fixed-distance frame is mounted on the actor. The preset constant distance between the actor and the shooting instrument can be achieved by the fixed-distance frame, and the overall load of the shooting instrument and the fixed-distance tracking device is shared by the actor and the follower. Moreover, the supporting platform 1 and the follower are located at the same end of the fixed-distance frame, so most of the weight of the overall load is borne by the follower, thereby reducing the physical exertion of the actor during shooting, making shooting more humane, reducing the number of breaks for the actor, and speeding up the shooting progress.

[0035] In the present invention, the distance frame includes an articulated base 17, a first distance tube, a second distance tube, and a fixed frame. During use, the articulated base 17 is connected to the actor, one end of the first distance tube is mounted on the articulated base 17, and one end of the second distance tube is hingedly connected to the articulated base 17, so that the second distance tube forms an adjustable angle with the first distance tube. The other end of the first distance tube is connected to the person following the film, and the other end of the second distance tube is mounted on the supporting platform 1. The fixed frame is connected to the first distance tube at one end and to the second distance tube at the other end. Once the angle between the first and second distance tubes is adjusted, the fixed frame can fix the angle between the first and second distance tubes. During filming, the second distance tube is positioned above the first distance tube. The first distance tube is connected to the actor and the person following the film, respectively, at its two ends, while the second distance tube is connected to the actor and the filming equipment, respectively, at its two ends. The weight of the filming equipment is transferred to the first distance tube via the fixed frame. The actor and the follower bear weight at both ends of the first distance tube respectively. The first distance tube is basically in a horizontal state (based on the fact that the height difference between the actor and the follower is not much). The inclination angle of the second distance tube is adjustable, so the pitch angle of the shooting instrument can be adjusted, thereby achieving fixed-distance follow-up at a predetermined pitch angle.

[0036] In the present invention, the first distance tube includes a first distance segment 8 and a second distance segment 9. The second distance segment 9 is located inside the first distance segment 8 and slides with the first distance segment 8, thereby changing the length of the first distance tube and adjusting the distance between the actor and the person following the camera.

[0037] Furthermore, in the present invention, the first distance segment 8 is provided with a first slide groove 7 along the length direction, and the second distance segment 9 is provided with a first slider. The first slider slides in cooperation with the first slide groove 7, which can guide the second distance segment 9 in and out of the first distance segment 8. Moreover, when in use, the first slider can be pushed to assist the extension and retraction of the second distance segment 9 in the first distance segment 8.

[0038] Furthermore, in the present invention, a first fastener is provided on the first slider. Once the extended length of the second distance segment 9 is determined, the first fastener can limit the sliding movement of the first slider within the first chute 7, thereby fixing the extended length of the second distance segment 9. Preferably, the first fastener is a bolt. Once the extended length of the second distance segment 9 is determined, tightening the bolt presses the first slider against the side of the first chute 7, preventing the second distance segment 9 from sliding and limiting the extended length of the second distance segment 9. Furthermore, by measuring the position of the first fastener within the chute, the extended length of the second distance segment 9 can be determined, thereby calibrating the operating length of the first distance tube.

[0039] In the present invention, the second distance tube includes a third distance section 4 and a fourth distance section 3. The fourth distance section 3 is located in the third distance section 4 and is slidably matched with the third distance section 4, so as to change the length of the second distance tube, thereby adjusting the distance between the actor and the shooting instrument. The first distance tube and the second distance tube can be adjusted independently. When the length of the first distance tube is adjusted, the distance between the actor and the follower can be adjusted. When the length of the second distance tube is adjusted, the distance between the actor and the shooting instrument can be adjusted. The different usage lengths of the first distance tube and the second distance tube can be combined into a variety of usage states, for example, the shooting instrument is located between the actor and the follower, and the follower is located between the actor and the shooting instrument. By adjusting different usage states, the proportion of the weight between the actor and the follower can be adjusted.

[0040] Furthermore, in the present invention, the third distance segment 4 is provided with a second slide groove 5 along the length direction, and the fourth distance segment 3 is provided with a second slider. The second slider slides in cooperation with the second slide groove 5, which can guide the fourth distance segment 3 in and out of the third distance segment 4, and can assist the fourth distance segment 3 in the extension and contraction of the third distance segment 4.

[0041] Furthermore, in the present invention, a second fastener is provided on the second slider. Preferably, the second fastener is a bolt, which can calibrate and limit the extended length of the fourth distance segment 3 when in use.

[0042] In the present invention, the first distance segment 8 is provided with a first slot at one end connected to the second distance segment 9, and the length direction of the first slot is the same as the length direction of the first distance segment 8. A first fastening ring 12 is provided outside the first slot, and the first fastening ring 12 surrounds the outer side of the circumference of the first distance segment 8, and can adjust the opening width of the first slot, thereby adjusting the tightness of the sliding fit between the first distance segment 8 and the second distance segment 9. Preferably, the first fastening ring 12 includes a first upper half ring and a first lower half ring, and the first upper half ring and the first lower half ring are connected by means of bolts and nuts. A gap is provided between the first upper half ring and the first lower half ring, and by adjusting the width of the gap, the opening width of the first slot can be adjusted, and then the tightness of the sliding fit between the first distance segment 8 and the second distance segment 9 can be adjusted, so that the second distance segment 9 can be smoothly extended or locked.

[0043] Furthermore, in the present invention, the third distance segment 4 is provided with a second slot at the end connecting to the fourth distance segment 3. The length of the second slot is aligned with the length of the third distance segment 4. A second fastening ring 11 is provided outside the second slot. This second fastening ring 11 surrounds the outer circumference of the third distance segment 4 and can adjust the opening width of the second slot. The second fastening ring 11 comprises a second upper half ring and a second lower half ring, with a gap between them. The second upper half ring and the second lower half ring are connected by a bolt and nut.

[0044] In the present invention, the fixing frame includes a first fixing rod 14 and a second fixing rod 13. The first fixing rod 14 is hingedly connected to the first fastening ring 12, and the second fixing rod 13 is hingedly connected to the second fastening ring 11. The first fixing rod 14 and the second fixing rod 13 are slidably engaged, for example, by means of a slide rail and a slide groove, and the engagement length can vary with the angle between the first and second distance tubes. The first fixing rod 14 is provided with a tightening button that, when tightened, limits the sliding movement between the first and second fixing rods 14, 13, thereby firmly supporting the fixing frame between the first and second distance tubes.

[0045] In the present invention, the cross-sections of the first and second spacer tubes perpendicular to their lengths are both rectangular, ensuring their bending and torsional strength. To reduce their weight, the first and second spacer tubes are hollowed out on their circumferences. Preferably, the width of the second spacer tube is no less than the width of the support platform 1. The structural strength of the second spacer tube alone ensures that the camera will not tip over after installation.

[0046] In the present invention, a handrail 10 is provided at one end of the first distance tube connected to the follower, providing a handhold for the follower. The handrail 10 is U-shaped and includes a crossbar and handrails mounted at both ends of the crossbar. The handrail 10 is connected to the first distance tube at the center of symmetry.

[0047] In the present invention, the support platform 1 is hingedly connected to the spacer frame at one end and connected to the spacer frame at the other end via a sliding support rod 2, allowing the camera's installation angle to be adjusted during installation. The spacer frame is provided with a fastening bolt, and the sliding support rod 2 is hingedly connected to the support platform 1 at one end and slides in engagement with the fastening bolt at the other end. Once the camera's installation angle is adjusted, tightening the fastening bolt limits the sliding support rod 2, thereby securing the camera on the second spacer tube.

[0048] Furthermore, in the present invention, a mounting position is provided on the supporting platform 1, and the mounting position includes a mounting hole and a mounting slot, which can provide multiple mounting positions for the photographing instrument.

[0049] The present invention also includes a connecting frame connected to the hinged seat 17. Specifically, the connecting frame comprises a connecting block and a connecting plate 6. When in use, the connecting block and connecting plate 6 are placed on either side of the wearable article. They can be connected through the wearable article, thereby clamping the wearable article (e.g., a vest) and connecting it to the actor. In an illustrative embodiment, the connecting block can be built into the actor's wearable article as a lining. The connecting block and connecting plate 6 are connected by bolts, allowing for both detachable and convenient fixation.

[0050] Furthermore, in the present invention, the connecting plate 6 is provided with a plurality of mounting holes, which can reduce the weight of the connecting plate 6 and provide mounting locations for equipment used for filming. Preferably, the mounting holes are threaded holes, which can provide mounting locations for accessories such as batteries of the filming equipment.

[0051] Furthermore, in the present invention, the supporting platform 1, the distance frame, and the connecting frame are all made of aluminum alloy, which is light in weight and has good structural strength. The connecting plate 6 is provided with a plurality of hollow holes, which can reduce the weight of the connecting plate 6.

[0052] In the present invention, the connecting frame is connected to the articulated seat 17 via an adapter frame. Specifically, the adapter frame includes a support ear 15 and an adapter block 16. The support ears 15 are arranged in pairs and mounted on the connecting plate 6, located on both sides of the adapter block 16. The adapter block 16 is provided with a first adapter hole and a second adapter hole, with the axis of the first adapter hole and the axis of the second adapter hole being arranged perpendicularly. The adapter block 16 is hingedly connected to the support ear 15 through the first adapter hole and to the articulated seat 17 through the second adapter hole, thereby enabling two degrees of rotational freedom between the distance frame and the actor, facilitating the tracking work.

[0053] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A fixed-distance tracking device, characterized in that: include: Loading platforms and distance frames; The supporting platform is used to install the shooting instrument; One end of the distance frame is connected to the supporting platform and the person following the camera, and the other end is used to be connected to the actor to maintain a predetermined distance between the actor and the camera. The distance frame includes a hinged seat, a first distance tube, a second distance tube and a fixed frame; The hinged seat is used to be connected to the actor, and one end of the first distance tube is installed on the hinged seat; One end of the second distance tube is hingedly connected to the hinge seat, and the second distance tube forms an adjustable angle with the first distance tube; One end of the fixing frame is connected to the first distance tube, and the other end is connected to the second distance tube, and is used to fix the adjusted angle between the first distance tube and the second distance tube; The other end of the second distance tube is equipped with the supporting platform, and the other end of the first distance tube is connected to the person taking the photo; The first distance tube includes a first distance segment and a second distance segment; The second distance segment is located inside the first distance segment and is in sliding engagement with the first distance segment; The first distance segment is provided with a first sliding groove along the length direction, and the second distance segment is provided with a first sliding block, and the first sliding block is slidably engaged with the first sliding groove; The first slider is provided with a first fastener for calibrating and limiting the extension length of the second distance segment; The first distance tube and the second distance tube are hollowed out on their circumferences; The cross-section of the first distance tube perpendicular to the length direction and the cross-section of the second distance tube perpendicular to the length direction are both rectangular; The width of the second distance tube is not less than the width of the bearing platform; The first distance tube is provided with a handrail at one end connected to the follower; The handrail frame is U-shaped and is connected to the first distance tube at the symmetrical center.

2. The fixed-distance tracking device according to claim 1, characterized in that: The second distance tube includes a third distance segment and a fourth distance segment; The fourth distance segment is located in the third distance segment and is in sliding engagement with the third distance segment; The third distance segment is provided with a second sliding groove along the length direction, and the fourth distance segment is provided with a second sliding block, and the second sliding block is slidably engaged with the second sliding groove; The second sliding block is provided with a second fastener for calibrating and limiting the extended length of the fourth distance segment.

3. The fixed-distance tracking device according to claim 2, characterized in that: The first distance segment is provided with a first slot at one end connected to the second distance segment, and the length direction of the first slot is the same as the length direction of the first distance segment; A first fastening ring is provided outside the first slot, and the first fastening ring surrounds the outer side of the circumference of the first distance section and is used to adjust the opening width of the first slot; The third distance segment is provided with a second slot at one end connected to the fourth distance segment, and the length direction of the second slot is the same as the length direction of the third distance segment; A second fastening ring is provided outside the second slot, and the second fastening ring surrounds the outer side of the circumference of the third distance segment and is used to adjust the opening width of the second slot.

4. The fixed-distance tracking device according to claim 3, characterized in that: The fixing frame includes a first fixing rod and a second fixing rod; The first fixing rod is hingedly connected to the first fastening ring, the second fixing rod is hingedly connected to the second fastening ring, and the first fixing rod and the second fixing rod are in sliding engagement; The first fixing rod is provided with a fastening button for limiting the sliding between the first fixing rod and the second fixing rod.

5. The fixed-distance tracking device according to claim 1, characterized in that: One end of the carrying platform is hingedly connected to the distance frame, and the other end is connected to the distance frame via a sliding support rod; The distance frame is provided with a fastening bolt, the sliding support rod is hingedly connected to the bearing platform at one end and slidably engaged with the fastening bolt at the other end, and the fastening bolt is used to limit the sliding of the sliding support rod; The supporting platform is provided with a mounting position, which includes a mounting hole and a mounting slot for mounting a photographing instrument.

6. The fixed-distance tracking device according to claim 1, characterized in that: It also includes a connecting frame connected to the hinge seat; The connecting frame includes a connecting block and a connecting plate, wherein the connecting block and the connecting plate are used to be placed on both sides of the wearable article and connected through the wearable article to clamp the wearable article; The connecting plate is provided with a plurality of mounting holes for reducing weight and providing mounting locations for photographing instruments; The connecting plate is provided with a plurality of hollow holes for reducing weight.

7. The fixed-distance tracking device according to claim 6, characterized in that: The connecting frame is connected to the hinged seat via an adapter frame; The adapter frame includes a support ear and an adapter block; The supporting ears are arranged in pairs and are mounted on the connecting plate and located on both sides of the adapter block; The adapter block is provided with a first adapter hole and a second adapter hole, and the axis of the first adapter hole is perpendicular to the axis of the second adapter hole; The adapter block is hingedly connected to the support ear through the first adapter hole and is hingedly connected to the hinge seat through the second adapter hole.

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