Lens macro focusing mechanism

Abstract

The utility model relates to the technical field of optical device adjustment, and discloses a lens macro focusing mechanism which comprises a lens barrel and a lens seat, a lens seat support is installed on the periphery of the lens seat and forms a moving pair through a flat position on the lens seat support, and the lens barrel and the lens seat support are fixed. A control panel is installed on the lens mount support through cooperation of a positioning column, a positioning hole and a fastening nut, a sensor is installed at the top of the control panel, and macro adjusting structures are distributed on the lens mount, the control panel and the lens mount support. The micro-distance adjusting structure comprises a motor, a gear, a casing, a rack, a lead screw, a fastener, a bearing and a pin rod. By arranging the macro adjusting mechanism, the lens is fixed, the sensor is driven by the bottom structure to move, the focusing function of the lens is achieved, imaging is adjusted, in addition, the external lens barrel can be designed to be fixed in length, and later installation and use are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of optical device adjustment technology, specifically a lens macro focusing mechanism. Background Technology

[0002] Macro lenses employ special structural designs to achieve high magnification and high resolution when shooting at close range. These designs typically include: a built-in telescopic lens barrel structure, a structure that allows for the interchange of the front and rear positions of optical lens groups within the lens, and a high magnification and precise focusing mechanism.

[0003] Most macro lenses currently available on the market achieve their adjustment function through telephoto lenses, ranging from short focal lengths (such as 50mm) to long focal lengths (such as 200mm or longer). These macro lenses require the lens to move back and forth to achieve macro adjustment, ensuring magnification and imaging effect, but generally cannot guarantee the overall length.

[0004] Current macro focusing structures keep the bottom frame stationary and control the image by adjusting the distance between the lens and the rear sensor through the lens's forward and backward movement. However, due to the forward and backward movement of the top of the lens, the total length of the lens is limited in certain length environments, preventing it from working and thus affecting the imaging effect and magnification.

[0005] Therefore, a lens macro focusing mechanism is needed. This application sets up a macro adjustment mechanism so that the lens itself is fixed and the sensor is moved by the bottom structure to adjust the imaging. In addition, the external lens barrel can also be designed with a fixed length to facilitate later installation and use. Utility Model Content

[0006] To address the technical problem of existing lens macro focusing structures that keep the bottom frame stationary and control the distance between the lens and the rear sensor by moving the lens back and forth to achieve imaging, and the limitation on the total length of the lens due to the forward and backward movement of the top of the lens in certain length environments, thus affecting the imaging effect and magnification, this utility model provides a lens macro focusing mechanism.

[0007] The present invention is achieved by the following technical solution: a lens macro focusing mechanism, including a lens barrel and a lens mount, wherein the top of the lens mount is integrally formed with a locking groove, and the lens body is threadedly connected to the inner side wall of the locking groove. The lens mount bracket is installed on the outer periphery of the lens mount and forms a sliding pair through the flat part set thereon.

[0008] A control board is mounted on the lens mount bracket through the cooperation of positioning pins, positioning holes and fastening nuts. A sensor is mounted on the top of the control board. Micro-adjustment structures are distributed on the lens mount, the control board and the lens mount bracket.

[0009] The macro adjustment structure includes a motor, gears, a housing, a rack, a lead screw, fasteners, bearings, and a pin. The macro adjustment structure is used to move the sensor and change the relative distance between the sensor and the lens body.

[0010] Preferably, the rack is integrally formed with a structure that is slightly narrower in the middle and slightly wider at the top and bottom. The rack is nested in the gap between the lens mount and the lens mount bracket, and the rack is fastened to the lens mount through the cooperation of the positioning hole and the positioning post.

[0011] Preferably, the housing is fixedly mounted on the bottom of the control panel by fastening bolts and forms a movable pair together with the lens mount bracket, and the motor is located in a reserved motor mounting position inside the housing.

[0012] Preferably, the bottom of the casing has a positioning hole, a fastener is installed in the positioning hole, and a motor casing cover is fixedly installed on the bottom of the casing through the positioning hole and the fastener.

[0013] Preferably, the bearing is disposed in a reserved shaft hole at the top of the motor housing cover, one end of the lead screw is inserted into the reserved shaft hole at the top of the motor housing cover, and the bearing is located on the outer periphery of one end of the lead screw, and the lead screw meshes with the rack.

[0014] Preferably, the gear is nested on the outer periphery of the lead screw and fastened by a pin, and the gear meshes with the gear on the output end of the motor.

[0015] Preferably, a light-shielding material is provided in the stepped cavity at the bottom of the lens mount, and the lens barrel is disposed on the outer periphery of the lens assembly on the lens mount.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model features a macro-adjustment structure. When adjustment is needed, the operator starts the motor, which drives the lead screw to rotate via gears. The lead screw, in turn, moves the rack up and down through its interaction with the rack, which in turn moves the lens mount bracket and control board up and down. This, in turn, moves the sensor, keeping the lens body and lens barrel relatively stationary. This allows the sensor to move relative to the lens body, completing the adjustment. By controlling the distance between the sensor and the lens, complete imaging is ensured, achieving the lens focusing function. Thus, by setting up a macro-adjustment mechanism, the lens itself remains stationary, while the bottom structure drives the sensor to move, thereby adjusting the image. In addition, the external lens barrel can also be designed with a fixed length for easy installation and use later. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the lens assembly of this utility model.

[0020] In the diagram: 1. Lens barrel; 2. Lens body; 3. Lens mount; 4. Motor; 5. Control board; 6. Sensor; 7. Gear; 8. Light shield; 9. Lens mount bracket; 10. Casing; 11. Rack; 12. Motor housing cover; 13. Lead screw; 14. Fastener; 15. Bearing; 16. Pin. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Please see Figure 1 - Figure 2 This embodiment of a lens macro focusing mechanism includes a lens barrel 1 and a lens mount 3. The top of the lens mount 3 is integrally formed with a locking groove. The lens mount 3 is threaded to the lens body 2 through the inner side wall of the locking groove. The lens mount bracket 9 is located on the outer periphery of the lens mount 3 and forms a sliding pair through the flat part on it. A control plate 5 is installed on the lens mount bracket 9 through the cooperation of a positioning post, a positioning hole and a fastening nut. A sensor 6 is installed on the top of the control plate 5. Macro adjustment structures are distributed on the lens mount 3, the control plate 5 and the lens mount bracket 9.

[0023] Furthermore, the rack 11 is integrally formed with a structure that is slightly narrower in the middle and slightly wider at the top and bottom. The rack 11 is nested in the gap between the lens mount 3 and the lens mount bracket 9. The rack 11 is fastened to the lens mount 3 through the cooperation of the positioning hole and the positioning post. The housing 10 is fixed to the bottom of the control plate 5 by fastening bolts and forms a moving pair together with the lens mount bracket 9. The motor 4 is located in the motor mounting position reserved inside the housing 10.

[0024] Furthermore, a positioning hole is provided at the bottom of the casing 10, and a fastener 14 is installed in the positioning hole. The motor casing cover 12 is fixedly installed at the bottom of the casing 10 through the positioning hole and the fastener 14. The bearing 15 is set in the reserved shaft hole at the top of the motor casing cover 12. One end of the lead screw 13 is inserted into the reserved shaft hole at the top of the motor casing cover 12, and the bearing 15 is located on the outer periphery of one end of the lead screw 13. The lead screw 13 meshes with the rack 11.

[0025] Furthermore, the gear 7 is nested on the outer periphery of the lead screw 13 and fastened by the pin 16. The gear 7 meshes with the gear on the output end of the motor 4. A light shield 8 is provided in the stepped cavity at the bottom of the lens mount 3. The lens barrel 1 is located on the outer periphery of the lens assembly on the lens mount 3. The lens barrel 1 is used to protect the lens assembly inside.

[0026] Specifically, the macro adjustment structure is composed of a motor 4, a gear 7, a housing 10, a rack 11, a lead screw 13, a fastener 14, a bearing 15, and a pin 16. It is used to move the sensor 6 and change the relative distance between the sensor 6 and the lens body 2. When adjustment is required, the operator starts the motor 4, which drives the lead screw 13 to rotate through the gear 7. The lead screw 13 and the rack 11 work together to move the rack 11 up and down, which in turn moves the lens mount bracket 9 and the control board 5 up and down. This allows the sensor 6 to move while the lens body 2 and the lens barrel 1 remain relatively stationary. This allows the sensor 6 to move relative to the lens body 2, completing the adjustment and achieving the lens focusing function. Thus, by setting up a macro adjustment mechanism, the lens itself is fixed, and the bottom structure drives the sensor 6 to move, thereby adjusting the image. In addition, the external lens barrel 1 can also be designed with a fixed length for easy installation and use later.

[0027] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A lens macro focusing mechanism, comprising a lens barrel (1) and a lens mount (3), characterized in that, The top of the lens mount (3) is integrally formed with a slot. The lens mount (3) is threaded to the lens body (2) through the inner side wall of the slot. The lens mount (3) is equipped with a lens mount bracket (9) on its outer periphery and forms a sliding pair through the flat part on the lens mount bracket (9). A control plate (5) is installed on the lens mount bracket (9) through the cooperation of positioning pins, positioning holes and fastening nuts. A sensor (6) is installed on the top of the control plate (5). Micro-adjustment structures are distributed on the lens mount (3), the control plate (5) and the lens mount bracket (9). The macro adjustment structure includes a motor (4), a gear (7), a housing (10), a rack (11), a lead screw (13), a fastener (14), a bearing (15), and a pin (16). The macro adjustment structure is used to move the sensor (6) and change the relative distance between the sensor (6) and the lens body (2).

2. The lens macro focusing mechanism according to claim 1, characterized in that, The rack (11) is integrally formed with a structure that is slightly narrower in the middle and slightly wider at the top and bottom. The rack (11) is nested in the gap between the lens mount (3) and the lens mount bracket (9), and the rack (11) is fastened to the lens mount (3) through the cooperation of the positioning hole and the positioning post.

3. The lens macro focusing mechanism according to claim 1, characterized in that, The housing (10) is fixedly mounted on the bottom of the control plate (5) by fastening bolts, and together with the lens mount bracket (9) forms a movable pair. The motor (4) is located in the motor mounting position reserved inside the housing (10).

4. A lens macro focusing mechanism according to claim 1, characterized in that, The bottom of the casing (10) is provided with a positioning hole, and a fastener (14) is installed in the positioning hole. The bottom of the casing (10) is fixedly installed with a motor casing cover (12) through the positioning hole and the fastener (14).

5. A lens macro focusing mechanism according to claim 1, characterized in that, The bearing (15) is located in the reserved shaft hole at the top of the motor housing cover (12). One end of the lead screw (13) is inserted into the reserved shaft hole at the top of the motor housing cover (12), and the bearing (15) is located on the outer periphery of one end of the lead screw (13). The lead screw (13) meshes with the rack (11).

6. A lens macro focusing mechanism according to claim 1, characterized in that, The gear (7) is nested on the outer periphery of the lead screw (13) and fastened by a pin (16). The gear (7) meshes with the gear on the output end of the motor (4).

7. A lens macro focusing mechanism according to claim 1, characterized in that, A light-shielding material (8) is provided in the stepped cavity at the bottom of the lens mount (3), and the lens barrel (1) is located on the outer periphery of the lens assembly on the lens mount (3).

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