Camera holder

Abstract

The utility model provides a kind of camera holder, including longitudinal drive mechanism and transverse drive mechanism, longitudinal mechanism includes first shell and longitudinal driver, camera is installed in first shell, longitudinal driver drives camera to carry out longitudinal rotation;Transverse drive mechanism includes second shell and transverse driver, and transverse driver drives longitudinal drive mechanism to carry out transverse rotation;At least one of the connecting point of longitudinal driver and camera and the connecting point of transverse driver and longitudinal drive mechanism is moved forward;Two opposite surfaces of first shell and second shell are equipped with sliding fit's convex structure and arc-shaped groove, and arc-shaped groove is equipped in rear end close to the end of camera.The camera holder moves forward connecting point, reduces camera observation window area, improves the performance of camera system, and by setting convex structure and arc-shaped groove between two housings, while reducing the observation window area, the overall stability can also be met.

Description

Technical Field

[0001] This utility model relates to the technical field of camera carriers, and in particular to a camera pan-tilt head. Background Technology

[0002] In integrated photography systems for mobile intelligent robots, the pan-tilt unit (PTZ) serves as a support device for mounting and securing the camera. The PTG has an observation window corresponding to the camera's rotation range; that is, the observation window area must accommodate the maximum range of camera rotation. However, an excessively large observation window area directly impacts the equipment's airtightness, pressure resistance, and optical interference. Therefore, it's necessary to minimize the observation window area. Traditional PTG units for cameras employ a centrally symmetrical axis design, resulting in a large rotation range when the camera rotates at large angles (e.g., ±60 degrees) on both the vertical and horizontal axes. This necessitates reserving excessive observation window area, leading to an overly large window that negatively affects the photography system, impacting the equipment's airtightness, pressure resistance, and optical interference resistance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing camera pan-tilt unit, which has an excessively large observation window area and poor performance of the camera system, and to provide a camera pan-tilt unit.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A camera pan-tilt unit, the camera pan-tilt unit comprising:

[0006] A longitudinal drive mechanism includes a first housing and a longitudinal driver. A camera is installed inside the first housing, and the longitudinal driver is connected to the camera and used to drive the camera to rotate longitudinally.

[0007] A lateral drive mechanism, comprising a second housing and a lateral driver, wherein the lateral driver is connected to the longitudinal drive mechanism and is used to drive the longitudinal drive mechanism to rotate laterally;

[0008] Wherein, the connection point between the longitudinal driver and the camera is the first connection point, and the connection point between the transverse driver and the longitudinal drive mechanism is the second connection point. At least one of the first connection point and the second connection point is located along the axial direction of the camera between the center of gravity of the camera and the camera lens.

[0009] Of the two opposing surfaces of the first housing and the second housing, one surface has a protruding structure and the other surface has an arc-shaped groove. The arc-shaped groove is located at the rear end near the end of the camera relative to the second connection point. The arc-shaped path of the arc-shaped groove matches the rotation path of the longitudinal drive mechanism. The protruding structure slides in conjunction with the arc-shaped groove.

[0010] In this solution, the camera pan-tilt unit achieves rotation in both longitudinal and lateral directions through the aforementioned longitudinal and lateral drive mechanisms, enabling rotation in any direction. By positioning at least one of the first and second connection points along the camera axis between the camera's center of gravity and the camera lens, the camera's rotation center is shifted forward relative to its center of gravity. This shortens the rotation radius from the camera lens to the rotation center, reducing the range of rotation covered by the camera and consequently decreasing the viewing window area, thus improving the performance of the camera system. Furthermore, by providing the aforementioned sliding-fit protrusion structure and arc-shaped groove between the two opposing surfaces of the two housings, the two drive mechanisms (longitudinal and lateral drive mechanisms) receive additional support from the protrusion structure and arc-shaped groove, in addition to the support from the second connection point. This prevents camera wobbling caused by the forward shift of the rotation center axis, reducing the viewing window area while maintaining overall stability of the camera pan-tilt unit on the moving vehicle.

[0011] Preferably, the first connection point is located at the position of the camera, and the second connection point is located at the end of the longitudinal drive mechanism near the camera.

[0012] In this solution, the above setting is the preferred setting for moving the rotation center of the camera forward, ensuring that the rotation center axes corresponding to the two connection points are both moved forward, further reducing the viewing window area.

[0013] Preferably, the first housing contains a camera housing for mounting the camera, and the top and bottom walls inside the first housing are movably connected to the camera housing.

[0014] In this design, the camera is protected by a camera housing. The top and bottom walls inside the first housing are movably connected to the camera housing, allowing for flexible adjustment of the camera and the angle of the camera housing within the first housing when the camera is rotated, while the first housing remains stationary, thus ensuring the overall stability of the camera pan-tilt unit.

[0015] Preferably, the top and bottom walls inside the first housing are respectively provided with a horizontally arranged first straight slide rail and a second straight slide rail, and the first housing is also provided with a first connecting rod and a second connecting rod.

[0016] One end of the first connecting rod is slidably connected to the first straight slide rail, and the other end of the first connecting rod is rotatably connected to the top of the camera housing;

[0017] One end of the second connecting rod is slidably connected to the second straight slide rail, and the other end of the second connecting rod is rotatably connected to the bottom of the camera housing.

[0018] In this solution, the above-mentioned configuration is a preferred form that allows the camera and camera housing to flexibly adjust their angles within the first outer casing while the first outer casing remains stationary. Specifically, the top and bottom of the camera housing are rotatably connected to the first and second connecting rods, respectively, enabling the camera to rotate freely vertically (i.e., longitudinally). Simultaneously, the first and second connecting rods are slidably connected to the first and second straight slide rails, respectively, so that when the camera rotates, it causes the two connecting rods (the first and second connecting rods) to slide horizontally along the two straight slide rails (the first and second straight slide rails). This accommodates the flexible rotation of the camera while restricting its rotation within the internal space of the first outer casing, which remains stationary, thus ensuring the overall stability of the camera pan / tilt unit.

[0019] Preferably, the first housing includes two relatively semi-open first left housing and first right housing, the first straight slide rails are respectively provided on the inner top walls of the first left housing and the first right housing, and the second straight slide rails are respectively provided on the inner bottom walls of the first left housing and the first right housing;

[0020] The first connecting rod has rollers at both ends perpendicular to the axial direction. The rollers are inserted into the first straight slide rail and are slidably connected to the first straight slide rail.

[0021] The second connecting rod has rollers at both ends perpendicular to the axial direction. The rollers are inserted into the second straight slide rail and are slidably connected to the second straight slide rail.

[0022] In this design, the first housing is divided into two relatively semi-open first left housing and first right housing, which facilitates manufacturing and installation. Each connecting rod's two ends perpendicular to the axial direction are slidably connected to two straight slide rails via rollers, enhancing the stability of the connecting rod's horizontal sliding and improving the imaging effect during recording.

[0023] Preferably, the camera housing includes two relatively semi-open left and right housings, each with a plurality of fixing posts, and the fixing posts having through holes for fasteners to pass through to connect the camera.

[0024] In this solution, the camera is fixed inside the camera housing by the above settings. The camera can be rotated simply by rotating the camera housing, while the camera remains relatively stationary, effectively protecting the camera.

[0025] Preferably, the first housing contains a camera housing, the camera is installed inside the camera housing, the longitudinal driver is installed on the side wall of the first housing, the side wall of the camera housing is fixedly connected to a first connector, and the output shaft of the longitudinal driver passes through the first housing and is rotatably connected to the first connector.

[0026] In this design, a longitudinal driver mounted on the side wall of the first housing drives the first connecting member to rotate. The first connecting member is fixedly connected to the side wall of the camera housing, enabling the longitudinal drive mechanism to rotate up and down. The longitudinal driver is not directly connected to the camera housing, but rather connected to it via the first connecting member as an intermediate connector. This reduces the impact of vibrations from the longitudinal driver on the camera, resulting in better stability.

[0027] Preferably, a second connector is provided between the first housing and the second housing, the second connector is fixedly connected to the first housing, and the output shaft of the transverse driver passes through the second housing and is rotatably connected to the second connector.

[0028] In this design, the first and second housings are separated by the second connector, facilitating the lateral rotation of the first housing. The lateral actuator is not directly connected to the first housing, but rather connected via the second connector as an intermediate link. This results in a larger connection area for the first housing, leading to better stability during lateral rotation.

[0029] Preferably, the protruding structure is provided on the bottom surface of the first outer shell, and the arc-shaped groove is provided on the top surface of the second outer shell.

[0030] Preferably, the bottom surface of the first housing is provided with at least two of the aforementioned protrusions.

[0031] In this design, by increasing the number of protruding structures, the number of support points between the first and second outer shells is increased, thereby improving structural stability.

[0032] The positive and progressive effects of this utility model are as follows: The camera pan-tilt unit achieves rotation in both longitudinal and lateral directions through longitudinal and lateral drive mechanisms, enabling rotation in any direction. By positioning at least one of the first and second connection points along the camera axis between the camera's center of gravity and the camera lens, the camera's rotation center is shifted forward relative to its center of gravity, reducing the viewing window area corresponding to the camera lens and improving the performance of the camera system. Furthermore, by providing a sliding-fitting protrusion structure and an arc-shaped groove between the two opposing surfaces of the two housings, the support between the two drive mechanisms is enhanced by the protrusion structure and the arc-shaped groove, in addition to the support of the second connection point. This prevents the camera from wobbling due to the forward shift of the rotation center axis, thus reducing the viewing window area while maintaining the overall stability of the camera pan-tilt unit on the moving vehicle. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the camera pan-tilt unit according to an embodiment of the present invention.

[0034] Figure 2 for Figure 1 half section Figure 1 .

[0035] Figure 3 for Figure 1 half section Figure 2 .

[0036] Figure 4 This is a schematic diagram of the longitudinal drive mechanism according to an embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the internal structure of the longitudinal drive mechanism of this utility model embodiment after removing the first left outer shell and the longitudinal driver.

[0038] Figure 6 This is a schematic diagram of the camera housing according to an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the transverse drive mechanism according to an embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of the internal structure of the longitudinal drive mechanism after the bottom plate is removed, according to an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] Camera Pan / Tilt 1

[0043] Longitudinal drive mechanism 2

[0044] First outer shell 21

[0045] First left outer shell 210

[0046] First right outer shell 211

[0047] First straight track slide rail 212

[0048] Second straight track slide rail 213

[0049] Protruding structure 22

[0050] Longitudinal drive 23

[0051] Camera housing 24

[0052] Left casing 241

[0053] Right casing 242

[0054] Ear 243

[0055] Fixed column 244

[0056] Camera front cover 245

[0057] Camera 25

[0058] Camera 251

[0059] First connecting rod 26

[0060] Second link 27

[0061] 28 rollers

[0062] First connector 291

[0063] Second connector 292

[0064] Connection hole 293

[0065] Lateral drive mechanism 3

[0066] Second outer shell 31

[0067] Casing 311

[0068] Base plate 312

[0069] Arc-shaped groove 313

[0070] Arc-shaped hole 314

[0071] Lateral drive 32

[0072] Control circuit board 33

[0073] First connection point 4

[0074] Second connection point 5

[0075] Camera's center of gravity 6

[0076] Camera axis A Detailed Implementation

[0077] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0078] This embodiment provides a camera pan-tilt unit 1, which is a support device for mounting and fixing a camera 25.

[0079] like Figures 1-8 As shown, the camera pan / tilt unit 1 includes a longitudinal drive mechanism 2 and a lateral drive mechanism. The longitudinal drive mechanism includes a first housing 21 and a longitudinal driver 23. A camera 25 is installed inside the first housing 21, and the longitudinal driver 23 is connected to the camera 25 and used to drive the camera 25 to rotate longitudinally. The lateral drive mechanism 3 includes a second housing 31 and a lateral driver 32. The lateral driver 32 is connected to the longitudinal drive mechanism 2 and used to drive the longitudinal drive mechanism 2 to rotate laterally. The longitudinal driver 23 and the lateral driver 32 are specifically two servos, hence also referred to as a longitudinal servo and a lateral servo. Both the longitudinal and lateral servos are electrically connected to a control circuit board 33 located inside the second housing 31. The control circuit board 33 is connected to an external power source. After power is applied, a signal is sent to the control circuit board 33 using a remote control, thereby controlling the longitudinal and lateral servos to rotate longitudinally and laterally, respectively.

[0080] The connection point between the longitudinal driver 23 and the camera 25 is the first connection point 4, and the connection point between the transverse driver 32 and the longitudinal drive mechanism 2 is the second connection point 5. At least one of the first connection point 4 and the second connection point 5 is located between the center of gravity 6 of the camera 25 and the camera 251 along the axial direction A of the camera 25.

[0081] Of the two opposing surfaces of the first outer shell 21 and the second outer shell 31, one surface is provided with a protruding structure 22 and the other surface is provided with an arc-shaped groove 313. The arc-shaped groove 313 is located at the rear end near the end of the camera 25 relative to the second connection point 5. The arc-shaped path of the arc-shaped groove 313 matches the rotation path of the longitudinal drive mechanism 2. The protruding structure 22 and the arc-shaped groove 313 are in sliding engagement.

[0082] The camera pan-tilt unit 1, through the aforementioned longitudinal drive mechanism 2 and lateral drive mechanism 3, achieves rotation in both longitudinal and lateral directions, enabling it to rotate in any direction. By positioning at least one of the aforementioned first connection point 4 and second connection point 5 along the axis A of the camera 25 between the camera's center of gravity 6 and the camera 251, that is, by shifting the rotation center of the camera 25 forward relative to the camera's center of gravity 6, the rotation radius of the camera 251 around the rotation center is shortened, thereby reducing the rotation range covered by the camera 251. This reduces the observation window area corresponding to the camera 251 and improves the performance of the camera system. By setting the aforementioned sliding fit protrusion structure 22 and arc-shaped groove 313 between the two opposing surfaces of the two housings, the two drive mechanisms (longitudinal drive mechanism 2 and transverse drive mechanism 3) are supported by the second connection point 5, and the support of the protrusion structure 22 and arc-shaped groove 313 is added. This prevents the camera 25 from shaking due to the forward movement of the rotation center axis of the pan-tilt unit. While reducing the observation window area, the overall stability of the camera pan-tilt unit 1 on the moving vehicle is also satisfied.

[0083] In this embodiment, the first connection point 4 is located at the position of the camera 251, and the second connection point 5 is located at the end of the longitudinal drive mechanism 2 near the camera 251. This connection point positioning is a preferred setting that moves the rotation center of the camera 25 forward, ensuring that the rotation center axes corresponding to both connection points are moved forward, thus minimizing the observation window area. In other embodiments, only one of the two connection points (the first connection point 4 and the second connection point 5) can be moved forward, or both connection points can be moved forward. Moving only one connection point forward can also achieve a certain effect of reducing the observation window area, but in this embodiment, both connection points are moved forward and placed closer to the camera 251, which can reduce the observation window area corresponding to the camera 251 by 75%, making it a preferred method with significant advantages in application.

[0084] In this embodiment, the protruding structure 22 is disposed on the bottom surface of the first outer shell 21, and the arc-shaped groove 313 is disposed on the top surface of the second outer shell 31. In other embodiments, the positions of the protruding structure 22 and the arc-shaped groove 313 can be interchanged, that is, the arc-shaped groove 313 is disposed on the bottom surface of the first outer shell 21, and the protruding structure 22 is disposed on the top surface of the second outer shell 31.

[0085] Furthermore, in this embodiment, the bottom surface of the first outer shell 21 is provided with two protruding structures 22 at intervals. By increasing the number of protruding structures 22, the number of support points between the first outer shell 21 and the second outer shell 31 is increased, thereby improving the structural stability.

[0086] like Figures 2-6As shown, in the longitudinal drive mechanism 2, the first outer shell 21 is provided with a camera housing 24 for mounting the camera 25. The camera 25 is protected by the camera housing 24. The top wall and bottom wall inside the first outer shell 21 are movably connected to the camera housing 24, so that when the camera 25 is rotated, the angle of the camera 25 and the camera housing 24 inside the first outer shell 21 can be flexibly adjusted, while the first outer shell 21 can remain stationary, so that the camera pan-tilt head 1 remains stable as a whole.

[0087] The specific connection method is as follows: the top and bottom walls inside the first housing 21 are respectively provided with a horizontally arranged first straight slide rail 212 and a second straight slide rail 213. The first housing 21 also contains a first connecting rod 26 and a second connecting rod 27. One end of the first connecting rod 26 is slidably connected to the first straight slide rail 212, and the other end is rotatably connected to the top of the camera housing 24. One end of the second connecting rod 27 is slidably connected to the second straight slide rail 213, and the other end is rotatably connected to the bottom of the camera housing 24. This structural arrangement is a preferred form that allows the camera 25 and camera housing 24 to flexibly adjust their angles within the first housing 21 while the first housing 21 remains stationary. In this design, the top and bottom of the camera housing 24 are rotatably connected to the first connecting rod 26 and the second connecting rod 27, respectively, allowing the camera 25 to rotate freely up and down (i.e., longitudinally). Simultaneously, the first connecting rod 26 and the second connecting rod 27 are slidably connected to the first straight slide rail 212 and the second straight slide rail 213, respectively. This allows the camera 25 to rotate horizontally along the two straight slide rails (first straight slide rail 212 and second straight slide rail 213) as it rotates. This accommodates the flexible rotation of the camera 25 while restricting its rotation within the first housing 21, allowing the first housing 21 to remain stationary and ensuring the overall stability of the camera pan / tilt unit 1. In other embodiments, the camera 25 or the camera housing 24 can also employ other structural forms to achieve a movable connection with the inner wall of the first housing 21, enabling flexible adjustment of the angles of the camera 25 and the camera housing 24 within the first housing 21.

[0088] The specific structure of the first outer shell 21 is as follows: The first outer shell 21 includes two relatively semi-open first left outer shell 210 and first right outer shell 211. During assembly, the first left outer shell 210 and first right outer shell 211 are spliced ​​together, and the two outer shells can be connected together at the joint by snap-fit ​​or by fasteners such as screws. The inner top walls of the first left outer shell 210 and the first right outer shell 211 are respectively provided with a first straight slide rail 212, and the inner bottom walls of the first left outer shell 210 and the first right outer shell 211 are respectively provided with a second straight slide rail 213. The first connecting rod 26 and the second connecting rod 27 are two plate-shaped connecting parts. The first connecting rod 26 has rollers 28 at both ends perpendicular to the axial direction A. The rollers 28 are inserted into the first straight slide rail 212 and slidably connected to the first straight slide rail 212. The second connecting rod 27 has rollers 28 at both ends perpendicular to the axial direction. The rollers 28 are inserted into the second straight slide rail 213 and slidably connected to the second straight slide rail 213. The first outer casing 21 is divided into two relatively semi-open first left outer casing 210 and first right outer casing 211, which facilitates manufacturing and installation. Each connecting rod is slidably connected to two straight slide rails at both ends perpendicular to the axis A by rollers 28, which enhances the stability of the connecting rod's horizontal sliding and is beneficial to the imaging effect during camera operation.

[0089] The specific structure of the camera housing 24 is as follows: The camera housing 24 includes two relatively semi-open left housing 241 and right housing 242. Each of the left and right housings 241 and 242 has several fixing posts 244, each with a through hole for fasteners to pass through and connect to the camera 25. The left housing 241 has protruding ears 243 on its upper and lower surfaces, and the right housing 242 also has protruding ears 243 on its upper and lower surfaces. A notch is formed between the protruding ears 243 of the left and right housings 242. The first connecting rod 26 and the second connecting rod 27 each pass through the ears 243 via a rod-shaped member, forming a rotatable connection. During assembly, the camera 25 is installed inside the left and right housings 241 and 242. After the left and right housings 242 are joined together, a front cover 245 is added to the camera 251 to protect it. In this camera 25 structure, the camera 25 is fixed in the camera housing 24. The camera 25 can be rotated simply by rotating the camera housing 24, while the camera 25 can remain relatively stationary, effectively protecting the camera 25.

[0090] like Figure 5As shown, the longitudinal driver 23 is mounted on the side wall of the first left outer casing 210. A first connector 291 is fixedly connected to the left side wall of the camera housing 24. The first connector 291 is a long, narrow butterfly wing with a large connection area to the camera housing 24, and its surface has multiple connection holes 293. Fasteners can be fitted onto one or more connection holes 293 to enhance the connection strength. The output shaft of the longitudinal driver 23 passes through the first outer casing 210 and is rotatably connected to the first connector 291. The right side wall of the camera housing 24 is rotatably connected to the first right outer casing 211 via a shaft and bushing, allowing the camera housing 24 to rotate freely.

[0091] The first connecting member 291 is driven to rotate by the longitudinal drive 23 located on the side wall of the first housing 21. The first connecting member 291 is fixedly connected to the side wall of the camera housing 24, enabling the longitudinal drive mechanism 2 to rotate up and down. The longitudinal drive 23 is not directly connected to the camera housing 24, but is connected to the camera housing 24 through the first connecting member 291 as an intermediate connecting member. This results in the camera 25 being less affected by the vibration of the longitudinal drive 23 and having better stability.

[0092] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, in the lateral drive mechanism 3, the second housing 31 includes a housing 311 and a base plate 312. A control circuit board 33 is mounted on the base plate 312. The housing 311 is machined with an arc-shaped groove 313 and also has an arc-shaped hole 314 with the same arc shape as the arc-shaped groove 313 but with a smaller arc. The arc-shaped hole 314 facilitates the passage of wires to connect the control circuit board 33 to an external power source. A lateral drive 32 (i.e., a lateral servo motor) is installed inside the housing 311.

[0093] A second connector 292 is provided between the first outer shell 21 and the second outer shell 31. The structure of the second connector 292 is the same as that of the first connector 291, which is also a long, strip-shaped butterfly wing. It spans and connects the first left outer shell 210 and the first right outer shell 211, and has a large connection area. Multiple connection holes 293 are also provided on the surface of the second connector 292. Fasteners can be fitted into one or more connection holes 293 to enhance the connection strength, depending on the required connection strength. The output shaft of the transverse driver 32 passes through the second outer shell 31 and is rotatably connected to the second connector 292.

[0094] The first outer shell 21 and the second outer shell 31 are separated by the second connector 292, which facilitates the lateral rotation of the first outer shell 21. The lateral actuator 32 is not directly connected to the first outer shell 21, but is connected to the first outer shell 21 through the second connector 292 as an intermediate connector. The first outer shell 21 has a larger connection area, and the stability of the first outer shell 21 when it rotates laterally is better.

[0095] In this embodiment, the first outer shell 21, the second outer shell 31, the first connecting rod 26, the second connecting rod 27, and the camera housing 24 are all made of polyethylene plastic, while each roller 28, the first connector 291, and the second connector 292 are metal parts.

[0096] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A camera pan-tilt unit, characterized in that, The camera pan-tilt unit includes: A longitudinal drive mechanism includes a first housing and a longitudinal driver. A camera is installed inside the first housing, and the longitudinal driver is connected to the camera and used to drive the camera to rotate longitudinally. A lateral drive mechanism, comprising a second housing and a lateral driver, wherein the lateral driver is connected to the longitudinal drive mechanism and is used to drive the longitudinal drive mechanism to rotate laterally; Wherein, the connection point between the longitudinal driver and the camera is the first connection point, and the connection point between the transverse driver and the longitudinal drive mechanism is the second connection point. At least one of the first connection point and the second connection point is located along the axial direction of the camera between the center of gravity of the camera and the camera lens. Of the two opposing surfaces of the first housing and the second housing, one surface has a protruding structure and the other surface has an arc-shaped groove. The arc-shaped groove is located at the rear end near the end of the camera relative to the second connection point. The arc-shaped path of the arc-shaped groove matches the rotation path of the longitudinal drive mechanism. The protruding structure slides in conjunction with the arc-shaped groove.

2. The camera pan-tilt unit as described in claim 1, characterized in that, The first connection point is located at the position of the camera, and the second connection point is located at the end of the longitudinal drive mechanism near the camera.

3. The camera pan-tilt unit as described in claim 1, characterized in that, The first outer casing contains a camera housing for mounting the camera, and the top and bottom walls inside the first outer casing are movably connected to the camera housing.

4. The camera pan-tilt unit as described in claim 3, characterized in that, The top and bottom walls inside the first housing are respectively provided with a horizontally arranged first straight slide rail and a second straight slide rail. The first housing is also provided with a first connecting rod and a second connecting rod. One end of the first connecting rod is slidably connected to the first straight slide rail, and the other end of the first connecting rod is rotatably connected to the top of the camera housing; One end of the second connecting rod is slidably connected to the second straight slide rail, and the other end of the second connecting rod is rotatably connected to the bottom of the camera housing.

5. The camera pan-tilt unit as described in claim 4, characterized in that, The first housing includes two relatively semi-open first left housing and first right housing. The first straight slide rail is provided on the inner top wall of the first left housing and the first right housing respectively, and the second straight slide rail is provided on the inner bottom wall of the first left housing and the first right housing respectively. The first connecting rod has rollers at both ends perpendicular to the axial direction. The rollers are inserted into the first straight slide rail and are slidably connected to the first straight slide rail. The second connecting rod has rollers at both ends perpendicular to the axial direction. The rollers are inserted into the second straight slide rail and are slidably connected to the second straight slide rail.

6. The camera pan-tilt unit as described in claim 3, characterized in that, The camera housing includes two relatively semi-open left and right housings. Each of the left and right housings has a plurality of fixing posts, and each fixing post has a through hole for fasteners to pass through to connect the camera.

7. The camera pan-tilt unit as described in claim 1, characterized in that, The first housing contains a camera housing, in which the camera is installed. The longitudinal driver is installed on the side wall of the first housing. A first connector is fixedly connected to the side wall of the camera housing. The output shaft of the longitudinal driver passes through the first housing and is rotatably connected to the first connector.

8. The camera pan-tilt unit as described in claim 1, characterized in that, A second connector is provided between the first housing and the second housing. The second connector is fixedly connected to the first housing, and the output shaft of the transverse driver passes through the second housing and is rotatably connected to the second connector.

9. The camera pan-tilt unit as described in claim 1, characterized in that, The protruding structure is provided on the bottom surface of the first outer shell, and the arc-shaped groove is provided on the top surface of the second outer shell.

10. The camera pan-tilt unit as described in claim 9, characterized in that, The bottom surface of the first housing is provided with at least two of the aforementioned protrusions.

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