Focusing mechanism, holder and camera device

Abstract

The utility model provides a focusing mechanism, which is used for adjusting the focal length of a camera device, and comprises a fixed component, the adjusting part is rotatably connected to the fixing component and is used for being matched with the camera device; the driving part is installed on the fixing component and used for providing driving force for rotation of the adjusting part; and the planetary gear transmission assembly is installed on the fixing component, and the planetary gear transmission assembly is in transmission connection with the driving piece and the adjusting piece so as to be used for driving the adjusting piece to drive the camera device to zoom under the driving of the driving piece. According to the focusing mechanism, the planetary gear transmission assembly is arranged between the driving piece and the adjusting piece, the rotating speed input by the driving piece is converted into the low rotating speed and large torque output by the adjusting piece, and therefore the large-torque lens is driven to rotate, and the focusing mechanism is small in structure, large in reduction ratio and high in reliability. And the required output torque can be realized by setting different gear parameters.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic equipment, in particular to a focusing mechanism, a pan head and a camera device. Background Art

[0002] As one of many photography auxiliary equipment, the focusing mechanism is mainly used to achieve dynamic adjustment and tracking of the lens focus during the shooting process of the photographic equipment.

[0003] When in use, the focusing mechanism is installed on the lens. The user operates the controller, and the controller sends a control signal to the focusing mechanism. The focusing mechanism drives the lens to rotate according to the received control signal, thereby completing actions such as lens focusing or zooming.

[0004] At present, the focusing mechanism is composed of a driving motor and an adjusting gear. The adjusting gear is directly connected to the output shaft of the driving motor. The output torque is too low, which causes the driving motor to be unable to drive the lens with a large torque, and thus unable to complete actions such as focusing or zooming the lens. The usage limitations are too high. Utility Model Content

[0005] The main purpose of the utility model is to provide a focusing mechanism, a pan / tilt platform and a camera device, aiming to solve the problem that the output torque of the existing focusing mechanism is too low.

[0006] To achieve the above object, the utility model provides a focusing mechanism for adjusting the focal length of a camera device, the focusing mechanism comprising:

[0007] Fixed components;

[0008] An adjusting member, the adjusting member being rotatably connected to the fixing member and being used to cooperate with the imaging device;

[0009] A driving member, the driving member is mounted on the fixing member, and the driving member is used to provide a driving force for the rotation of the adjusting member;

[0010] A planetary gear transmission assembly is installed on the fixed component, and the planetary gear transmission assembly is connected to the driving member and the adjusting member so as to drive the adjusting member to drive the camera device to zoom under the drive of the driving member.

[0011] In some embodiments, the planetary gear transmission assembly includes:

[0012] a sun gear connected to an output shaft of the driving member;

[0013] At least two planetary gears, the at least two planetary gears are rotatably connected to the fixed component and are respectively meshed with the sun gear;

[0014] A gear ring, wherein the inner side of the gear ring is respectively meshed and connected with the at least two planetary gears, and the outer side of the gear ring is connected with the adjusting member.

[0015] In some embodiments, the focusing mechanism further comprises:

[0016] A clamping assembly, wherein the fixing member is detachably connected to the imaging device through the clamping assembly.

[0017] In some embodiments, the adjusting member is a circular ring structure, the inner wall of the adjusting member is connected to the outer wall of the gear ring, the outer wall of the adjusting member is provided with an adjusting gear, and the adjusting gear is used to mesh with the camera device.

[0018] In some embodiments, a central axis of the adjusting member is coaxially arranged with a central axis of the sun gear.

[0019] In some embodiments, the fixed component is protruding with at least two connecting shafts, and one of the planetary gears is rotatably mounted on each of the connecting shafts.

[0020] In some embodiments, the fixing member includes a first housing, the first housing is formed with a first inner cavity and a lateral opening communicating with the first inner cavity, and the planetary gear transmission assembly is accommodated in the first inner cavity;

[0021] The output shaft of the driving member is arranged from outside the first inner cavity to inside the first inner cavity and is connected to the planetary gear transmission assembly;

[0022] The adjusting member is partially accommodated in the first inner cavity, and at least partially protrudes from the lateral opening outside the first inner cavity for cooperating with the imaging device.

[0023] In some embodiments, the focusing mechanism further comprises:

[0024] A magnet, the magnet being mounted on the output shaft of the driving member and rotating along with the output shaft;

[0025] A magnetic encoder is mounted on the fixed component and arranged opposite to the magnet to sense the position change of the magnet and convert the position change into an electrical signal;

[0026] A main control circuit board is electrically connected to the magnetic encoder and the driving member respectively, and is used to receive the electrical signal generated by the magnetic encoder and control the rotation of the driving member according to the electrical signal.

[0027] The utility model also provides a pan head, comprising:

[0028] A bearing assembly, the bearing assembly is used to provide an installation location for the camera device;

[0029] As in the aforementioned focusing mechanism, the fixing member is mounted on the bearing assembly.

[0030] The utility model also provides a camera device, comprising a camera device and the above-mentioned focusing mechanism or the above-mentioned pan / tilt head, wherein the camera device has a focusing ring, and the adjusting member is engaged with the focusing ring.

[0031] The focusing mechanism of the utility model realizes the conversion of the rotation speed input by the driving member into the low-speed and high-torque output by the adjusting member by arranging a planetary gear transmission assembly between the driving member and the adjusting member, thereby driving the high-torque lens to rotate. The focusing mechanism of the utility model has a compact structure and a large reduction ratio, and the required output torque can be achieved by setting different gear parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural schematic diagram of an embodiment of the focusing mechanism of the utility model;

[0033] Figure 2 This is a disassembly diagram of an embodiment of the focusing mechanism of the utility model;

[0034] Figure 3 It is a schematic diagram of the cooperation between the planetary gear transmission assembly and the adjusting member of the utility model;

[0035] Figure 4 This is a structural schematic diagram of an embodiment of the fixing component of the utility model;

[0036] Figure 5 It is a cross-sectional schematic diagram of an embodiment of the focusing mechanism of the utility model;

[0037] Figure 6 It is a structural schematic diagram of an embodiment of the clamping assembly of the utility model.

[0038] Description of Figure Numbers:

[0039] 100 Focusing mechanism 10 Fixed components 20 Adjustment parts 30 Drive parts 40 Planetary gear transmission components 31 Output shaft 41 Sun gear 42 Planetary gear 43 Ring gear 21 Adjustment gear 11 Connecting shaft 12 First shell 13 First inner cavity 14 Side opening 50 magnet 60 Magnetic encoder 70 Main control circuit board 15 Second shell 80 Clamping components 81 Enclosure 82 Clamping space 83 Clamping mouth 84 perforation 85 Positioning hole 86 Locking parts

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0044] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] The utility model provides a focusing mechanism 100, which is used to adjust the focal length of a camera device and realize dynamic adjustment and tracking of the lens focus.

[0046] The focus mechanism 100 proposed in this embodiment can be connected to the focus controller (such as a focus hand wheel) by communication, and the user can control the focus mechanism 100 by manipulating the focus controller, and the focus mechanism 100 then drives the lens of the photographic device to rotate, and completes lens focusing, following focus or zooming, etc. The communication connection mode between the focus mechanism 100 and the focus controller can be a wired connection or a wireless connection (such as a Bluetooth connection), which is specifically set according to the actual situation.

[0047] Please refer to Figure 1 and Figure 2 In one embodiment of the present invention, the focusing mechanism 100 comprises:

[0048] A fixing member 10;

[0049] The adjusting member 20 is rotatably connected to the fixing member 10 and is used to cooperate with the imaging device and drive the imaging device to rotate so as to complete lens focusing, following focus or zooming.

[0050] The driving member 30 is mounted on the fixing member 10 , and is used to provide driving force for the rotation of the adjusting member 20 .

[0051] In this embodiment, the driving member 30 can be a motor, which converts electrical energy into mechanical energy to drive the adjusting member 20 to rotate, with a stable speed, not prone to failure, and extremely high reliability. In addition, the speed and torque output can be accurately controlled through PID control, thereby meeting the speed and torque requirements of different production processes. Of course, in other embodiments, the driving member 30 can also be selected from other types, not limited to this.

[0052] The planetary gear transmission assembly 40 is installed on the fixed component 10, and the planetary gear transmission assembly 40 is connected to the driving member 30 and the adjusting member 20 for driving the adjusting member 20 to drive the camera device to zoom under the drive of the driving member 30, thereby completing the focusing, following focusing or zooming of the lens.

[0053] In this embodiment, the planetary gear transmission assembly 40 can convert the rotation speed input by the driving member 30 into a low-speed high-torque output by the adjusting member 20, thereby driving the high-torque lens to rotate, with a large transmission ratio, high transmission efficiency, and stable operation. Moreover, the focusing mechanism 100 of the utility model has a compact structure and a large reduction ratio, and the required output torque can be achieved by setting different gear parameters.

[0054] Please refer to Figure 3 and Figure 5 In some embodiments, the planetary gear transmission assembly 40 includes:

[0055] The sun gear 41 is connected to the output shaft 31 of the driving member 30 . The driving member 30 drives the output shaft 31 to rotate, thereby driving the sun gear 41 to rotate.

[0056] At least two planetary gears 42 are rotatably connected to the fixed member 10 and are respectively meshed with the sun gear 41. The rotation of the sun gear 41 drives the at least two planetary gears 42 to rotate. It should be noted that in this embodiment, the at least two planetary gears 42 only rotate under the meshing transmission of the sun gear 41, and do not revolve around the sun gear 41.

[0057] The ring gear 43, the inner side of the ring gear 43 is respectively meshed with at least two planetary gears 42, and the outer side of the ring gear 43 is connected to the adjusting member 20. The at least two planetary gears 42 rotate under the transmission action of the driving member 30 and the sun gear 41, and drive the ring gear 43 and the adjusting member 20 to rotate, so as to complete the lens focusing, following focus or zooming and other actions.

[0058] The planetary gear transmission assembly 40 of the utility model has a compact structure, a large transmission ratio, a high transmission efficiency, and a stable operation, and can drive a lens with a large torque to rotate.

[0059] In some embodiments, the driving member 30 is a motor, which includes a rotor and a stator, and an output shaft 31 is installed at the center of the rotor, and one end of the output shaft 31 is connected to the sun gear 41. The motor drives the output shaft 31 to rotate, thereby driving the sun gear 41, the planetary gear 42 and the ring gear 43 to rotate, and then drives the adjustment member 20 to rotate, so as to drive the camera device to zoom, and complete the lens focusing, following focus or zooming and other actions.

[0060] In some embodiments, three planetary gears 42 are provided, and the three planetary gears 42 are evenly distributed around the outer circumference of the sun gear 41, so that the forces between the planetary gears 42 and the sun gear 41 are balanced and the transmission is smooth.

[0061] Of course, in other embodiments, the number of planetary gears 42 can be adaptively increased according to actual conditions, such as increasing to four, five, etc., but not limited thereto. In this embodiment, by increasing the number of planetary gears 42, on the one hand, the sum of the friction between the sun gear 41 and the planetary gears 42 can be increased; on the other hand, the sun gear 41 can be firmly limited by using multiple planetary gears 42 to resist the sun gear 41 from different directions. In addition, the reduction ratio of the entire planetary gear transmission assembly 40 can also be increased to improve the output torque of the ring gear 43.

[0062] In some embodiments, the adjusting member 20 is a circular ring structure, the inner wall of the adjusting member 20 is connected to the outer wall of the ring gear 43, the outer wall of the adjusting member 20 is provided with an adjusting gear 21, and the adjusting gear 21 is used to engage with the camera device. The ring gear 43 drives the adjusting member 20 to rotate, so that the adjusting gear 21 drives the camera device to zoom.

[0063] In some embodiments, the central axis of the adjusting member 20 is coaxially arranged with the central axis of the sun gear 41. When the sun gear 41 rotates, the adjusting member 20 rotates coaxially with the sun gear 41 through the transmission effect of the planetary gear 42 and the ring gear 43, with high transmission efficiency and stable operation.

[0064] In some embodiments, the fixing member 10 is provided with at least two connecting shafts 11, and a planetary gear 42 is rotatably mounted on each connecting shaft 11. The number of the connecting shafts 11 is consistent with the number of the planetary gears 42, so as to provide a mounting carrier for the planetary gears 42.

[0065] Please refer to Figure 4 The fixing member 10 includes a first shell 12 , the first shell 12 is formed with a first inner cavity 13 and a lateral opening 14 communicating with the first inner cavity 13 , and the planetary gear transmission assembly 40 is accommodated in the first inner cavity 13 .

[0066] The output shaft 31 of the driving member 30 is passed from outside the first inner cavity 13 to inside the first inner cavity 13 and is connected to the planetary gear transmission assembly 40 , so that the driving member 30 can drive the planetary gear transmission assembly 40 to rotate.

[0067] The adjusting member 20 is partially received in the first inner cavity 13, and at least partially protrudes from the side opening 14 outside the first inner cavity 13 for cooperation with the imaging device, ensuring that the adjusting member 20 is exposed to be able to engage with the imaging device (such as the focus ring of the lens).

[0068] In some embodiments, the fixing member 10 further includes a second housing 15 , the driving member 30 is accommodated in the second housing 15 , and the output shaft 31 of the driving member 30 passes through the second housing 15 into the first inner cavity 13 and is connected to the planetary gear transmission assembly 40 .

[0069] In this embodiment, the fixing member 10 is divided into a first housing 12 and a second housing 15 , the planetary gear transmission assembly 40 is disposed in the first housing 12 , and the driving member 30 is disposed in the second housing 15 , thereby improving the installation flexibility of the two and facilitating assembly and maintenance.

[0070] In some embodiments, please refer to Figure 6 , the focusing mechanism 100 further includes:

[0071] The clamping assembly 80 , through which the fixing member 10 is detachably connected to the imaging device.

[0072] Specifically, in this embodiment, the clamping assembly 80 includes an enclosure portion 81 constructed on the first shell 12, and the enclosure portion 81 and the first shell 12 are combined to form a clamping space 82 and a clamping opening 83 connected to the clamping space 82, and the clamping space 82 is used to accommodate the connecting components of the camera device.

[0073] Among them, the enclosing portion 81 is provided with a through hole 84 at the clamping mouth 83, and the first shell 12 is provided with a positioning hole 85 corresponding to the through hole 84 at the clamping mouth 83. The clamping assembly 80 also includes a locking piece 86, which passes through the through hole 84 and the clamping mouth 83 in sequence and is detachably connected to the positioning hole 85, thereby stably clamping the fixing member 10 and the camera device.

[0074] In some embodiments, the locking member 86 can be a screw having an external thread. The positioning hole 85 is a threaded hole. The screw is inserted into the threaded hole, and the external thread of the screw is fixed with the threaded hole, so that disassembly and assembly are convenient and quick.

[0075] In some embodiments, the focusing mechanism 100 further includes:

[0076] A magnet 50, wherein the magnet 50 is mounted on the output shaft 31 of the driving member 30 and rotates along with the output shaft 31;

[0077] A magnetic encoder 60, which is mounted on the fixed component 10 and arranged opposite to the magnet 50 with a distance therebetween, so as to sense the position change of the magnet 50 and convert the position change into an electrical signal;

[0078] The main control circuit board 70 is electrically connected to the magnetic encoder 60 and the driving member 30 respectively, and is used to receive the electrical signal generated by the magnetic encoder 60 and control the rotation of the driving member 30 according to the electrical signal.

[0079] When the output shaft 31 of the driving member 30 rotates, the magnetic field distribution in the area around the magnet 50 will change with the rotation of the output shaft 31, and the magnetic encoder 60 can detect the change in the magnetic field. By measuring the change in the magnetic field, the magnetic encoder 60 can calculate the rotation angle and direction of the output shaft 31, and convert the position change information into an electrical signal and transmit it to the main control circuit board 70. The main control circuit board 70 controls the rotation of the driving member 30 according to the electrical signal.

[0080] This embodiment obtains the motion information of the driving member 30 by cooperating with the magnet 50 and the magnetic encoder 60, which has the advantages of high precision and stability, can realize the measurement of small displacement, and can maintain stability under high-speed movement. Moreover, the two do not need to touch physical parts, so there will be no friction loss or mechanical failure, and it can withstand large loads and have a long service life.

[0081] In this embodiment, the magnet 50, the magnetic encoder 60 and the main control circuit board 70 are housed in the first housing 12. Of course, in other embodiments, the magnet 50, the magnetic encoder 60 and the main control circuit board 70 can be housed in the second housing 15, and the user can make specific settings according to actual conditions.

[0082] The utility model also provides a pan / tilt head, comprising: a bearing assembly, the bearing assembly is used to provide an installation place for a camera device; a focusing mechanism 100 as described above, and a fixing member 10 is installed on the bearing assembly. Since the pan / tilt head adopts all the technical solutions of all the embodiments of the focusing mechanism 100, the pan / tilt head of the utility model also has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0083] The gimbal is used to carry a camera device. It is understandable that the camera device can be integrated with the gimbal or separated from the gimbal. The camera device can be a smart phone, or other camera equipment, such as a SLR camera.

[0084] The utility model also provides a camera device, including a camera device and a focusing mechanism 100 or a pan / tilt head as described above, wherein the camera device has a focusing ring, and the adjusting member 20 is engaged with the focusing ring. Since the camera device adopts all the technical solutions of all the embodiments of the focusing mechanism 100, the camera device of the utility model also has at least all the beneficial effects brought by the technical solutions of the embodiments, which will not be described one by one here.

[0085] In summary, the focus adjustment mechanism 100 of the present invention converts the rotation speed input by the drive member 30 into a low-speed high-torque output by the adjustment member 20 by setting a planetary gear transmission assembly 40 between the drive member 30 and the adjustment member 20, thereby driving the lens with high torque to rotate, with a large transmission ratio, high transmission efficiency, and stable operation. Moreover, the focus adjustment mechanism 100 of the present invention has a compact structure and a large reduction ratio, and the required output torque can be achieved by setting different gear parameters.

[0086] The above embodiments of the utility model are merely examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the utility model are still within the scope of protection of the utility model.

Claims

1. A focusing mechanism for adjusting the focal length of an imaging device, characterized in that: The focusing mechanism comprises: Fixed components; An adjusting member, the adjusting member being rotatably connected to the fixing member and being used to cooperate with the imaging device; A driving member, the driving member is mounted on the fixing member, and the driving member is used to provide a driving force for the rotation of the adjusting member; A planetary gear transmission assembly is installed on the fixed component, and the planetary gear transmission assembly is connected to the driving member and the adjusting member so as to drive the adjusting member to drive the camera device to zoom under the drive of the driving member.

2. The focusing mechanism according to claim 1, characterized in that: The planetary gear transmission assembly comprises: a sun gear connected to an output shaft of the driving member; At least two planetary gears, the at least two planetary gears are rotatably connected to the fixed component and are respectively meshed with the sun gear; A gear ring, wherein the inner side of the gear ring is respectively meshed and connected with the at least two planetary gears, and the outer side of the gear ring is connected with the adjusting member.

3. The focusing mechanism according to claim 1, characterized in that: The focusing mechanism also includes: A clamping assembly, wherein the fixing member is detachably connected to the imaging device through the clamping assembly.

4. The focusing mechanism according to claim 2, characterized in that: The adjusting member is a circular ring structure, the inner wall of the adjusting member is connected to the outer wall of the gear ring, the outer wall of the adjusting member is provided with an adjusting gear, and the adjusting gear is used for meshing connection with the camera device.

5. The focusing mechanism according to claim 2, characterized in that: The central axis of the adjusting member is coaxially arranged with the central axis of the sun gear.

6. The focusing mechanism according to claim 2, characterized in that: The fixing component is protrudingly provided with at least two connecting shafts, and one of the planetary gears can be rotatably mounted on each of the connecting shafts.

7. The focusing mechanism according to any one of claims 1 to 6, characterized in that: The fixing member comprises a first housing, the first housing is formed with a first inner cavity and a lateral opening communicating with the first inner cavity, and the planetary gear transmission assembly is accommodated in the first inner cavity; The output shaft of the driving member is arranged from outside the first inner cavity to inside the first inner cavity and is connected to the planetary gear transmission assembly; The adjusting member is partially accommodated in the first inner cavity, and at least partially protrudes from the lateral opening outside the first inner cavity for cooperating with the imaging device.

8. The focusing mechanism according to any one of claims 1 to 6, characterized in that: The focusing mechanism also includes: A magnet, the magnet being mounted on the output shaft of the driving member and rotating along with the output shaft; A magnetic encoder is mounted on the fixed component and arranged opposite to the magnet to sense the position change of the magnet and convert the position change into an electrical signal; A main control circuit board is electrically connected to the magnetic encoder and the driving member respectively, and is used to receive the electrical signal generated by the magnetic encoder and control the rotation of the driving member according to the electrical signal.

9. A pan / tilt head, characterized in that: include: A bearing assembly, the bearing assembly is used to provide an installation location for the camera device; The focusing mechanism according to any one of claims 1 to 8, wherein the fixing member is mounted on the bearing assembly.

10. A camera device, characterized in that: It comprises an imaging device and a focusing mechanism as claimed in any one of claims 1 to 8 or a pan / tilt head as claimed in claim 9, wherein the imaging device has a focusing ring, and the adjusting member is engaged with the focusing ring.

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