Focus follower motor gear output device

Abstract

The utility model relates to the technical field of camera shooting, in particular to a follow focus motor gear output device. The device comprises a follow focus device main body structure and a motor thereof, and further comprises a pinion connected with the motor and an output gear meshed with the pinion, a bearing is sleeved in the output gear, and the bearing is positioned and installed on the follow focus device main body structure through a T-shaped shaft and a locking screw. The product can save space, more space is saved compared with a traditional scheme of screwing screws with hands, and shaking of the gear can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of camera photography, in particular to a motor gear output device for a follow focus device. Background Art

[0002] The follow focus motor is an output device used to receive and execute the data of the follow focus remote control to drive the focus requirements of the camera. The output gears of existing follow focus product motors are prone to shaking, and the output gear structure is fixed and the gap is too large. That is, the original output gears have no locking force and are prone to moving up and down. Therefore, the positioning accuracy is poor, the rotation stability is poor, and the space occupied is too large. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a focus follower motor gear output device, which is characterized by small size and high precision.

[0005] (II) Technical solution

[0006] A focus follower motor gear output device comprises a focus follower main structure and a motor thereof, and further comprises a pinion connected to the motor and an output gear meshing with the pinion, wherein a bearing is sleeved inside the output gear, and the bearing is positioned and installed on the focus follower main structure through a T-shaped shaft and a locking screw; two bearings are arranged up and down, the inner ring of the bearing is fixed by the T-shaped shaft, and the outer ring rotates with the output gear; the focus follower main structure comprises an upper shell and a lower shell, and the upper shell and the lower shell are respectively provided with an upper rib position and a lower rib position, which press the inner ring of the bearing from the top and the bottom respectively.

[0007] Preferably, the pinion is fixed to the rotor of the motor by means of fixing screws.

[0008] Preferably, the pinion is provided with a gear rod, the gear rod is provided with a detection magnet, and a speed detection plate is provided corresponding to the detection magnet.

[0009] Preferably, a tube clamp and an adjusting screw are provided at the bottom of the main structure of the follow focus device.

[0010] Preferably, the main structure of the follow focus device is provided with a PCB control board inside, and an antenna and an aviation plug are provided outside, and the PCB control board is electrically connected to the motor, the antenna and the aviation plug.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides a new type of follow focus motor gear output device, which has the following advantages:

[0013] 1. The T-shaped shaft structure not only serves as a nut but also as a shaft, which can save space and is more space-saving than the traditional hand-tightening screw solution;

[0014] 2. Double bearings can greatly reduce gear shaking;

[0015] 3. Equipped with magnet and speed detection plate, it can well position and control the output gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the structural principle diagram of this product;

[0017] Figure 2 This is a cross-sectional view of the product;

[0018] Figure 3 This is a partial exploded view of this product.

[0019] Explanation of reference numbers: 1. Main structure of the follow focus device; 2. Motor; 3. Pinion; 4. Output gear; 5. Bearing; 6. T-shaft; 7. Locking screw; 8. Upper shell; 81. Upper rib position; 9. Lower shell; 91. Lower rib position; 10. Fixing screw; 11. Gear rod; 12. Detection magnet; 13. Speed ​​detection board; 14. Pipe clamp; 15. Adjusting screw; 16. PCB control board; 17. Antenna; 18. Aviation plug. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings, wherein the same components are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower", "bottom surface" and "top surface" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions 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 in 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.

[0022] Design concept: Design a new follow focus motor gear output device with small size, high positioning accuracy, and good positioning and control of output gears.

[0023] Example:

[0024] like Figure 1-Figure 3As shown, the technical solution provided by the utility model is a follow focus motor gear output device, including a follow focus main structure 1 and a motor 2 thereof, and further including a pinion 3 connected to the motor 2, and an output gear 4 meshing with the pinion 3, a bearing 5 is sleeved in the output gear 4, and the bearing 5 is positioned and installed on the follow focus main structure 1 through a T-shaft 6 and a locking screw 7.

[0025] In this embodiment, two bearings 5 ​​are arranged in an upper and lower arrangement, the inner ring of the bearing 5 is fixed by a T-shaped shaft 6, and the outer ring rotates with the output gear 4. The main structure 1 of the follow focus device includes an upper shell 8 and a lower shell 9, and the upper shell 8 and the lower shell 9 are respectively provided with an upper rib position 81 and a lower rib position 91, which press the inner ring of the bearing 5 from the upper and lower sides respectively.

[0026] The pinion 3 of this embodiment is fixed to the rotor of the motor 2 by four fixing screws 10 . The pinion 3 is provided with a gear rod 11 . The gear rod 11 is provided with a detection magnet 12 . A rotation speed detection plate 13 is provided corresponding to the detection magnet 12 .

[0027] In order to facilitate fixation, a tube clamp 14 and an adjusting screw 15 are provided at the bottom of the follow focus device main structure 1 for fixing on the guide rail of the camera.

[0028] The main structure 1 of the follow focus device of this embodiment is provided with a PCB control board 16 inside, and an antenna 17 and an aviation plug 18 outside. The PCB control board 16 is electrically connected to the motor 2, the antenna 17 and the aviation plug 18; the antenna 17 is used to receive external wireless control signals, such as controlling the rotation of the motor 2 through a remote control; the aviation plug 18 can realize the access of electrical signals, power supply, and wired signal input, and can also control the motor 2.

[0029] Working principle and process:

[0030] The output gear 4 of this product is meshed with the gear on the camera lens (the camera lens has a corresponding gear). First, after the control part of the motor 2 sends a signal, the motor 2 rotates, and the pinion 3 connected to the motor 2 rotates at the same time. Because the output gear 4 and the pinion 3 on the motor 2 are meshed with each other, the output gear 4 starts to rotate due to the rotation of the pinion 3 on the motor 2. The focus of this product is the precise fixing structure of the output gear 4. The structure has two bearings 5, a T-shaped shaft 6 and a nut, and then the locking screw 7 tightens the T-shaped shaft 6 to accurately position the output gear 4. The T-shaped shaft 6 structure not only serves as a nut but also as a shaft, which can save space and is more space-saving than the traditional hand-tightening screw solution. The inner ring of the bearing 5 is fixed with the shaft, and the outer ring rotates with the output gear 4, which can be positioned more accurately. The upper shell 8 and the lower shell 9 each have ribs to press the inner ring of the bearing 5, and the double bearings 5 ​​can greatly reduce the shaking of the output gear 4. The T-shaped shaft 6 can reduce the space, and locking with the locking screw 7 can reduce the space for the bearing 5 to move. However, there is a clearance between the inner and outer rings of the bearing 5, and the outer ring can move normally. During the installation process of this product, all structural parts maintain very small gaps, and the single-side gap is controlled within 0.03MM. A detection magnet 12 is stuck to the gear rod 11 under the pinion 3 of the motor 2, which rotates with the rotor and pinion 3 of the motor 2. There is a fixed speed detection board 13 below. There is a chip on the board that can detect the rotation of the detection magnet 12 of the motor 2, which can in turn accurately control the rotation of the feedback motor 2.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A follow focus motor gear output device, comprising a follow focus main body structure and a motor thereof, Features: It also includes a pinion connected to the motor and an output gear meshing with the pinion. A bearing is installed inside the output gear, and the bearing is positioned and installed on the main structure of the focus follower through a T-shaped shaft and a locking screw. There are two bearings arranged in an upper and lower arrangement, the inner ring of the bearing is fixed by a T-shaped shaft, and the outer ring rotates with the output gear. The main structure of the focus follower includes an upper shell and a lower shell, and the upper shell and the lower shell are respectively provided with an upper rib position and a lower rib position, which press the inner ring of the bearing from the top and the bottom respectively.

2. The follow focus motor gear output device according to claim 1, Features: The pinion is fixed on the rotor of the motor by means of fixing screws.

3. The follow focus motor gear output device according to claim 2, Features: The pinion is provided with a gear rod, the gear rod is provided with a detection magnet, and a rotation speed detection plate is provided corresponding to the detection magnet.

4. The follow focus motor gear output device according to claim 1, Features: A tube clamp and an adjusting screw are provided at the bottom of the main structure of the follow focus device.

5. The follow focus motor gear output device according to claim 1, Features: The main structure of the follow focus device is provided with a PCB control board inside and an antenna and an aviation plug outside. The PCB control board is electrically connected to the motor, the antenna and the aviation plug.

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