Electronic manual focus lens and camera

Abstract

The utility model discloses an electronic manual focusing lens, include: main cylinder, inside is equipped with focusing lens barrel, focusing lens barrel movably installs in the inside of main cylinder, is equipped with elastic part in the main cylinder, and elastic part is connected focusing lens barrel, drive assembly is installed on the main cylinder, is equipped with motor and knob, and the output of motor is connected with screw rod, and knob is equipped with screw hole on, and screw rod passes through the screw hole on knob, and knob is used for knob focusing lens barrel, focusing assembly is equipped with focus ring, photoelectric encoder, photosensitive part and control mainboard, and focus ring installs on the main cylinder, and photoelectric encoder installs on focus ring, and photosensitive part installs on the main cylinder, and photosensitive part is opposite photoelectric encoder, and control mainboard is connected with photosensitive part, motor respectively, and the position of focusing lens barrel in the main cylinder is determined through knob cooperation elastic part to realize accurate focusing, and motor, elastic part, knob can select smaller model to realize the position change of focusing lens barrel, and accurate control focusing is realized through the rotation focus ring.

Description

Technical Field

[0001] This utility model relates to the field of camera equipment, and in particular to an electronic manual focus lens and camera. Background Technology

[0002] Manual focus is a technique that involves manually adjusting the lens focus to achieve the best imaging results.

[0003] Currently, most lenses on the market are full-time mechanical manual focus lenses. Full-time mechanical manual focus lenses move the lens group directly through a cam or threaded structure connected to the focus ring. Full-time mechanical manual focus lenses have complex mechanical structures, resulting in larger lens size and weight. They also have limited focusing accuracy and unstable product reliability, making it difficult to meet the miniaturization and high precision requirements of modern photographic equipment. Utility Model Content

[0004] In order to overcome the shortcomings of existing technologies, such as complex mechanical structure, large lens size and weight, limited focusing accuracy, and unstable product reliability due to full-time mechanical manual focus.

[0005] First aspect This utility model provides an electronic manual focus lens, comprising: The main tube contains a focusing lens tube, which is movably installed inside the main tube. The main tube contains an elastic element that connects to the focusing lens tube. The drive assembly, mounted on the main barrel, includes a motor and a lever. The output end of the motor is connected to a screw, and the lever has a screw hole through which the screw passes. The lever is used to move the focusing lens barrel. The focusing assembly includes a focus ring, an optical encoder, a photosensitive element, and a control main board. The focus ring is mounted on the main tube, the optical encoder is mounted on the focus ring, and the photosensitive element is mounted on the main tube, facing the optical encoder. The control main board is connected to the photosensitive element and the motor respectively.

[0006] Optionally, the trigger switch includes a focal ring, an optical encoder, and a photosensitive element. The focal ring is mounted on the main tube, the optical encoder is mounted on the focal ring, the photosensitive element is mounted on the main tube, and the photosensitive element faces the optical encoder.

[0007] Optionally, the main tube is provided with a boss, and the photosensitive element is mounted on the boss.

[0008] Optionally, the focusing lens barrel is provided with a follower, and the actuating element cooperates with the follower to move the focusing lens.

[0009] Optionally, the main tube is provided with a positioning groove, and the focusing lens tube is provided with a positioning part, which is located in the positioning groove.

[0010] Optionally, the focus ring is provided with a slot, and the photoelectric code disk is installed in the slot.

[0011] Optionally, a guide post is provided inside the main tube, and a connecting part is provided on the focusing lens tube, with the connecting part sleeved on the guide post.

[0012] Optionally, the main cylinder is provided with a through hole, the motor is provided with a mounting bracket, the mounting bracket is fixed on the main cylinder and located above the through hole, and the screw is installed on the mounting bracket and located inside the through hole.

[0013] Optionally, the front end of the main tube is provided with a front lens group, the rear end of the main tube is provided with a rear lens group, and the focusing lens group is located between the front lens group and the rear lens group.

[0014] Second aspect This utility model provides a camera, including the electronic manual focus lens described in the first aspect.

[0015] The beneficial effects of this utility model are as follows: In this application, the focus ring, photoelectric encoder, and photosensitive element are used in conjunction with the control motor to realize the rotation of the electronic manual control motor. Then, the motor drives the actuating element to move the focusing lens barrel to the rear end of the main barrel. The elastic element can move the focusing lens barrel to the front end of the main barrel. The position of the focusing lens barrel in the main barrel is determined by the actuating element and the elastic element, thereby achieving precise focusing. The motor, elastic element, and actuating element can all be selected in smaller sizes to change the position of the focusing lens barrel without occupying too much assembly space, thus simplifying the overall structure of the lens. Precise focusing is achieved by rotating the focus ring. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 These are assembly diagrams from some embodiments; Figure 2 These are exploded views of some embodiments; Figure 3 These are cross-sectional views from some embodiments; Figure 4 These are schematic diagrams of the internal structure of the main cylinder in some embodiments; Figure 5 These are schematic diagrams of the focusing lens barrel in some embodiments; Figure 6 These are schematic diagrams of the drive components in some embodiments.

[0018] Explanation of reference numerals in the attached figures: 1. Main tube; 101. Focusing lens tube; 2. Drive assembly; 201. Motor; 202. Actuator; 203. Screw; 3. Focusing assembly; 302. Control main board; 303. Focus ring; 304. Optical encoder; 305. Photosensitive element; 102. Boss; 103. Follower; 104. Positioning groove; 105. Positioning part; 306. Slot; 307. Guide post; 106. Connecting part; 204. Mounting bracket; 107. Front lens tube; 108. Rear lens tube. Detailed Implementation

[0019] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0020] This utility model provides an electronic manual focus lens, used as a core component of a camera, comprising: a main barrel 1, which houses a focusing lens barrel 101 movably mounted inside the main barrel 1; an elastic element (not shown in the figure) connected to the focusing lens barrel 101 on the inner wall of the main barrel 1; a drive assembly 2 mounted on the main barrel 1, comprising a motor 201 and a toggle member 202; a screw 203 connected to the output end of the motor 201; a screw hole on the toggle member 202 through which the screw 203 passes, and the toggle member 202 is used to move the focusing lens barrel 101; and a focusing assembly 3 comprising a focus ring, an optical encoder, a photosensitive element, and a control main board; the focus ring is mounted on the main barrel, the optical encoder is mounted on the focus ring, the photosensitive element is mounted on the main barrel and faces the optical encoder; and the control main board is connected to the photosensitive element and the motor.

[0021] The main barrel 1 is the main component of the lens, used to assemble other auxiliary components. The main barrel 1 is cylindrical in shape and has a cavity inside. Both ends of the main barrel 1 have openings communicating with the cavity. The focusing lens barrel 101 is a mechanical structure in the camera lens used to adjust the forward and backward movement of the lens group to achieve focusing. The drive assembly 2 is used to drive the focusing lens to move forward and backward inside the main barrel 1. The focusing assembly 3 is used to control the drive assembly to adjust the position of the focusing lens barrel. The elastic element refers to a connecting element with axial elasticity, which can be implemented by a helical spring, wave spring, disc spring or rubber washer. The actuating element 202 specifically refers to a rigid component that can abut and push against the focusing lens barrel 101. It can be a block or rod-shaped component made of hard plastic or metal. The focus ring 303 is the main adjustment component. The focus ring 303 is a ring structure that can be sleeved on the main barrel 1. The photoelectric encoder 304 is a sensor element used to measure the rotation angle, speed or position. The photosensitive element 305 is used to cooperate with the photoelectric encoder 304 to sense the position.

[0022] In practice, a focusing lens barrel 101 is installed inside the main barrel 1. The focusing lens barrel 101 is movably installed inside the main barrel 1. An elastic element on the inner wall of the main barrel 1 is connected to the focusing lens barrel 101. The drive assembly 2 is installed on the main barrel 1. A screw 203 is connected to the output end of the motor 201. The screw 203 passes through a screw hole on the actuating element 202. A focusing assembly 3 is installed on the main barrel 1. A focus ring 303 is installed on the main barrel 1. The focus ring 303 is manually rotated to make the photoelectric encoder 304 rotate accordingly. After the predetermined angle is reached, the photosensitive element 305 stops sensing the position change of the photoelectric encoder 304. The photosensitive element converts the displacement change signal into an electrical signal, and the control board 302 controls the rotation of the motor 201 according to the electrical signal, ultimately changing the position of the focusing lens barrel 101 within the main barrel 1. Through the focus ring 303, the photosensitive element 305, and the photoelectric encoder 304, the position of the focusing lens barrel 101 is changed in a manual and electronic adjustment manner to achieve precise focusing, causing the motor 201 to start, stop, or change its speed, etc., driving the motor 201. When screw 203 is in operation, screw 203 engages with the screw hole on the actuating member 202, allowing the actuating member 202 to move back and forth as screw 203 rotates. When the actuating member 202 is not in contact with the focusing lens barrel 101, the focusing lens barrel 101 is positioned towards the front end within the main barrel 1. Motor 201 drives screw 203, which in turn drives the actuating member 202. The actuating member 202 actuates the focusing lens barrel 101, causing it to move towards the rear end of the main barrel 1. This movement of the focusing lens barrel 101 also compresses the spring within the main barrel 1. The focusing lens barrel 101 is moved to a predetermined position by the actuating element 202 to achieve focusing. If it is necessary to continue adjusting the focusing lens barrel 101 to the front, the motor 201 reverses to move the actuating element 202 on the screw 203 to the front. The elastic element rebounds and pushes the focusing lens barrel 101 to the front. After reaching the predetermined position, the motor 201 stops rotating, the actuating element 202 stops moving, and the actuating element 202 and the elastic element abut against the front and rear sides of the focusing lens barrel 101 respectively, so that the focusing lens stays in the predetermined position, thereby achieving adjustment.

[0023] Compared to existing technologies, this application does not require the use of components with relatively large space requirements, such as cams or threaded structures, to change the position of the focusing lens barrel 101. The position of the focusing lens barrel 101 can be changed simply by the cooperation of the motor 201, the actuating element 202, and the elastic element.

[0024] In this application, a focus ring, photoelectric encoder, and photosensitive element are used in conjunction with a control motor to achieve electronic manual control of the motor's rotation. The motor 201 drives the actuating element 202 to move the focusing lens barrel 101 towards the rear end of the main barrel 1. An elastic element allows the focusing lens barrel 101 to move towards the front end of the main barrel 1. The actuating element 202, in conjunction with the elastic element, determines the position of the focusing lens barrel 101 within the main barrel 1, thereby achieving precise focusing. The motor 201, elastic element, and actuating element 202 can all be selected in smaller sizes to change the position of the focusing lens barrel 101 without occupying too much assembly space, thus simplifying the overall structure of the lens. Precise focusing is achieved by rotating the focus ring.

[0025] Furthermore, the elastic element is a helical spring, the actuating element 202 is a block structure, the control main board 302 is a PCBA board, and the motor 201 is connected to the PCBA board through an FPC board.

[0026] Furthermore, the photoelectric code disk 304 is made of PET material and is disc-shaped. Its surface is etched to a black and bright silver color, with the black and bright silver colors distributed evenly at 2° intervals across the entire surface. Double-sided adhesive is applied to the back of the photoelectric code disk 304, which is attached to the focal ring 303. The control mainboard 302 is a PCBA board, connected to an FPC board. Two photosensitive elements 305 are provided, both mounted on the FPC board. A boss 102 is provided on the main cylinder 1, and the portion of the FPC board containing the photosensitive elements 305 is fixed to the boss 102. The photosensitive elements 305 face the photoelectric code disk 304, and the positions and angles of the two A-phase and B-phase photosensitive elements 305 are consistent with the code disk, with a spacing between them. With a 90° phase difference, when the focus ring 303 is manually rotated, the photoelectric encoder 304 reflects two different types of light, one black and one silver, causing the photosensitive element 305 to output high and low level signals. The two photosensitive elements 305, A and B, can output a total of 4 level combinations, forming the phase sequence of the A and B phases (A leading B is clockwise, and vice versa) to determine the rotation direction of the focus ring 303. The photosensitive element 305, together with the photoelectric encoder 304, outputs 4 level combination signals, which are transmitted to the camera body processor through the connected PCBA board. After receiving the combination signal, the camera body processor sends a feedback command to drive the lens motor 201 to rotate forward or reverse. The motor 201 drives the focusing lens barrel 101 to move through the toggle element 202, thus completing the focus adjustment.

[0027] In some embodiments, the focusing lens barrel 101 is provided with a follower 103, and the actuating member 202 cooperates with the follower 103 to move the focusing lens barrel 101.

[0028] The follower 103 is a component used to cooperate with the actuating member 202 to drive the focusing lens barrel 101, specifically a structure that extends outward from the side of the focusing lens barrel 101.

[0029] During implementation, the actuating member 202 is directly opposite the follower part 103. When the actuating member 202 moves, the actuating member 202 abuts against the follower part 103, thereby driving the focusing lens barrel 101 by driving the follower part 103.

[0030] Furthermore, the follower 103 is a plate-shaped structure integrally formed with the focusing lens barrel 101.

[0031] In some embodiments, the main tube 1 is provided with a positioning groove 104, and the focusing lens tube 101 is provided with a positioning part 105, which is located in the positioning groove 104.

[0032] During implementation, a positioning groove 104 is opened in the main barrel 1, and a positioning part 105 is set in the focusing lens barrel 101. When the focusing lens barrel 101 is assembled into the main barrel 1, the positioning part 105 is located in the positioning groove 104. Before assembly, the assembly position of the focusing lens barrel 101 can be determined by the cooperation between the positioning part 105 and the positioning groove 104.

[0033] Furthermore, when the focusing lens barrel 101 moves within the main barrel 1, the positioning part 105 moves within the positioning groove 104. The main barrel 1 is provided with a positioning post, and the focusing lens barrel 101 is provided with a positioning plate. The positioning plate is a structure that extends integrally from the side of the focusing lens barrel 101. One end of the positioning plate is provided with an opening. When the focusing lens barrel 101 is assembled within the main barrel 1, the positioning post is located at the opening at one end of the positioning plate. First, the positioning post, in conjunction with the opening on the positioning plate, facilitates the assembly and positioning of the focusing lens barrel 101. Second, the positioning post, in conjunction with the opening on the positioning plate, can limit the focusing lens barrel 101 and prevent it from shifting when it moves.

[0034] In some embodiments, the focal ring 303 is provided with a slot 306, and the photoelectric encoder 304 is installed in the slot 306.

[0035] During implementation, the photoelectric encoder 304 is installed in the slot 306 of the focal ring 303. The slot 306 limits the photoelectric encoder 304 to ensure its stability within the slot 306.

[0036] Specifically, the focal ring 303 is cylindrical, with a circular bottom. The slot 306 is located at the bottom of the focal ring 303. The photoelectric encoder 304 is also circular and is attached to the slot 306 with double-sided adhesive. The shape of the slot 306 is the same as that of the photoelectric encoder 304.

[0037] In some embodiments, the main barrel 1 is provided with a guide post 307, and the focusing lens barrel 101 is provided with a connecting part 106, which is sleeved on the guide post 307.

[0038] In practice, a guide post 307 is provided inside the main tube 1, and a connecting part 106 is provided on the focusing lens tube 101. The connecting part 106 is sleeved on the guide post 307. When the focusing lens tube 101 moves inside the main tube 1, the connecting part 106 moves on the guide post 307. The guide post 307 plays a guiding role in the movement of the focusing lens tube 101. Furthermore, the focusing lens tube 101 is stabilized inside the main tube 1 through the cooperation between the connecting part 106 and the guide post 307. Therefore, the guide post 307 also ensures the stability of the focusing lens tube 101.

[0039] Furthermore, the connecting part 106 is a structure formed by extending outward from the side wall of the focusing lens barrel 101. The connecting part 106 is provided with a through hole, and the guide post 307 passes through the through hole, so that the connecting part 106 is sleeved in the guide post 307. The elastic element is a helical spring. One end of the helical spring (not shown in the figure) is connected to the inner wall of the main barrel 1, and the other end of the helical spring is connected to the connecting part 106. After the focusing lens barrel 101 moves, the connecting part 106 pulls the helical spring, and the helical spring is stretched. When the actuating member 202 moves upward, the helical spring will pull the connecting part 106 back forward.

[0040] In some embodiments, the main cylinder 1 is provided with a through hole, the motor 201 is provided with a mounting bracket 204, the mounting bracket 204 is fixed on the main cylinder 1 and located above the through hole, and the screw 203 is mounted on the mounting bracket 204 and located inside the through hole.

[0041] In practice, the mounting bracket 204 is mounted on the motor 201, and the screw 203 is mounted on the mounting bracket 204. The motor 201 is fixed to the main barrel 1 through the mounting bracket 204. The mounting bracket 204 is located above the through hole, and the screw 203 is located inside the through hole. The actuating element 202 mounted on the screw 203 is also located inside the through hole. By setting a through hole on the surface of the main barrel 1 so that the actuating element 202 is located inside the main barrel 1, the purpose of actuating the focusing lens barrel 101 is achieved.

[0042] Furthermore, the mounting bracket 204 is provided with a guide rod, which is parallel to the screw 203. The actuating component 202 is provided with two through holes, through which the guide rod and the screw 203 pass respectively.

[0043] In some embodiments, the front end of the main tube 1 is provided with a front lens group 107, the rear end of the main tube 1 is provided with a rear lens group 108, and the focusing lens group 101 is located between the front lens group 107 and the rear lens group 108.

[0044] In practice, a front lens barrel 107 is installed at the front end of the main barrel 1, and a rear lens barrel 108 is installed at the rear end. The focusing lens barrel 101 is installed inside the main barrel 1. Therefore, the focusing lens barrel 101 is located between the front lens barrel 107 and the rear lens barrel 108. The front lens barrel 107, the focusing lens barrel 101, and the rear lens barrel 108 are on the same axis. Changing the position of the focusing lens barrel 101 inside the main barrel 1 can adjust the focus of the lens. Optical lenses are assembled inside the front lens barrel 107, the rear lens barrel 108, and the focusing lens barrel 101. The optical lenses use various specifications of annular spacers to meet the lens spacing requirements of the optical system.

[0045] This utility model provides a camera, including the electronic manual focus lens described in the above embodiments. Since the structure of the electronic manual focus lens has been described in detail in the above embodiments, it will not be repeated here.

[0046] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An electronic manual focus lens, characterized in that, include: The main tube contains a focusing lens tube, which is movably installed inside the main tube. The main tube contains an elastic element that connects to the focusing lens tube. The drive assembly, mounted on the main barrel, includes a motor and a lever. The output end of the motor is connected to a screw, and the lever has a screw hole through which the screw passes. The lever is used to move the focusing lens barrel. The focusing assembly includes a focus ring, an optical encoder, a photosensitive element, and a control main board. The focus ring is mounted on the main tube, the optical encoder is mounted on the focus ring, and the photosensitive element is mounted on the main tube, facing the optical encoder. The control main board is connected to the photosensitive element and the motor respectively.

2. The electronic manual focus lens according to claim 1, characterized in that, The main tube is provided with a boss, and the photosensitive element is mounted on the boss.

3. The electronic manual focus lens according to claim 1, characterized in that, The focusing lens barrel is equipped with a follower part, and the actuating element cooperates with the follower part to move the focusing lens.

4. The electronic manual focus lens according to claim 1, characterized in that, The main tube is provided with a positioning groove, and the focusing lens tube is provided with a positioning part, which is located in the positioning groove.

5. The electronic manual focus lens according to claim 1, characterized in that, The focal ring is equipped with a slot, and the photoelectric encoder is installed in the slot.

6. The electronic manual focus lens according to claim 1, characterized in that, The main tube is equipped with a guide post, and the focusing lens tube is equipped with a connecting part, which is fitted onto the guide post.

7. The electronic manual focus lens according to claim 1, characterized in that, The main cylinder has a through hole, and the motor has a mounting bracket. The mounting bracket is fixed on the main cylinder and located above the through hole. The screw is mounted on the mounting bracket and is located inside the through hole.

8. The electronic manual focus lens according to claim 1, characterized in that, The front end of the main tube is equipped with a front lens group, the rear end of the main tube is equipped with a rear lens group, and the focusing lens group is located between the front and rear lens groups.

9. The electronic manual focus lens according to claim 7, characterized in that, The mounting bracket is equipped with a guide rod, which is parallel to the screw. The actuating component has two through holes, through which the guide rod and the screw pass respectively.

10. A camera, characterized in that, Includes the electronic manual focus lens as described in any one of claims 1-9.

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