Telescopic zoom lens

Abstract

The utility model relates to the technical field of zoom lenses, in particular to a telescopic zoom lens, which is mounted on a projection light machine and comprises a mounting plate, the mounting plate is fixed on the projection light machine, a driving cover is rotatably arranged on the mounting plate, a lens component is slidably arranged in the lens component, and the driving cover is fixed on the lens component. A driving motor is fixedly arranged on one side of the driving cover; a lens assembly is fixedly arranged in the mounting groove, guide columns are symmetrically and fixedly connected to the outer side of the lens assembly, a gear ring is fixedly arranged at one end of the driving cover, a cam groove is fixedly formed in the driving cover, and the guide columns are matched with the cam groove. According to the telescopic zoom lens provided by the utility model, through the cooperation of the cam groove and the guide column arranged on the lens, the lens assembly can be telescoped and translated in a reciprocating manner under the state that the driving cover continuously rotates, automatic zoom operation is realized, the zoom process is smooth and stable, the zoom is accurate, the zoom precision is high, the operation is simple in the zoom process, and the lens does not need to be rotated in a reciprocating manner; an optocoupler limiting structure of an existing lens is simplified, and the focusing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of zoom lenses, in particular to a telescopic zoom lens. Background Art

[0002] Most projection optical machine lenses use a photocoupler limit structure to achieve the autofocus function, and the photocoupler limit rotates back and forth during operation, which is prone to malfunction.

[0003] In the prior art, the name disclosed in application number: CN202410056665.8 is: zoom lens, wherein the lens body; an adjustment ring, including a zoom ring and a focus ring, the rotation angle of the zoom ring adjusts the zoom state of the lens body, and the rotation angle of the focus ring adjusts the focus state of the lens body.

[0004] However, the zoom lens mentioned in the prior art realizes zooming and focusing of the lens through structures such as a zoom ring and a focus ring. The structure is relatively complex, and the accuracy of zooming and focusing is poor and the operation is cumbersome. Therefore, it is necessary to design a telescopic zoom lens. Utility Model Content

[0005] The utility model aims to provide a telescopic zoom lens to solve the problems in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A telescopic zoom lens is installed on a projection optical machine, the telescopic zoom lens comprises a mounting plate, the mounting plate is fixed on the projection optical machine, a driving cover is rotatably provided on the mounting plate, a lens assembly is slidably provided in the driving cover, and a driving motor is fixedly provided on one side of the driving cover;

[0008] A lens assembly is fixedly arranged in the lens assembly, a guide column is symmetrically fixedly connected to the outer side of the lens assembly, a gear ring is fixedly arranged at one end of the driving cover, a cam groove is fixedly arranged in the driving cover, and the guide column cooperates with the cam groove.

[0009] Furthermore, a through groove is provided in the mounting plate, a guide sleeve is fixed in the through groove, a horizontally arranged guide groove is arranged in an array in the guide sleeve, two limit plates are fixed on the mounting plate and located on one side of the guide sleeve, the limit plates are located on the outside of the guide sleeve, and the limit plates are symmetrically arranged on the mounting plate.

[0010] Furthermore, a plurality of connecting columns are fixedly connected to one side of the mounting plate, and an arc-shaped pressing ring for fixing the gear ring is fixedly provided on the connecting column, and the arc-shaped pressing ring is coaxially arranged with the guide sleeve.

[0011] Furthermore, the lens assembly is fixedly provided with guide rails distributed in an array, and the lens assembly is provided with mounting grooves for mounting the lens assembly, and the guide rails cooperate with the guide grooves.

[0012] Furthermore, a driving gear is fixedly provided at the output end of the driving motor.

[0013] Furthermore, the gear ring is located on one side of the driving gear, and the gear ring cooperates with the driving gear.

[0014] Beneficial effects of the utility model:

[0015] 1. The telescopic zoom lens of the utility model can reciprocately telescope and translate the lens assembly to realize automatic zoom operation by cooperating with the cam groove and the guide column arranged on the lens while the driving cover is continuously rotating. The zooming process is smooth and stable, and the zooming is accurate and has high zooming precision. The operation is simple during the zooming process, and there is no need to reciprocate the lens.

[0016] 2. The telescopic zoom lens of the utility model simplifies the optical coupling limit structure of the existing lens, adds a simple focusing structure to the lens, realizes stepless automatic telescopic zoom, has stable functions, low focusing cost, and high practical comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the telescopic zoom lens of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of the telescopic zoom lens of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the drive cover of the utility model;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the telescopic zoom lens of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the mounting plate of the utility model. DETAILED DESCRIPTION

[0023] 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 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.

[0024] A telescopic zoom lens, such as Figure 1As shown, the telescopic zoom lens is installed on the projection light machine, and the telescopic zoom lens includes a mounting plate 1, which is fixedly arranged at the lens of the projection light machine, a driving cover 3 is rotatably provided on the mounting plate 1, a lens assembly 2 is slidably provided in the driving cover 3, and a driving motor 4 is fixedly provided on one side of the driving cover 3.

[0025] In this embodiment, the housing of the driving motor 4 is fixedly connected to the housing of the projection light machine, and bolts penetrate through the housing of the driving motor 4 and are threadedly connected to the housing of the projection light machine.

[0026] like Figure 2-5 As shown, a through groove is provided in the mounting plate 1, in which a guide sleeve 12 is fixedly installed, and an array of guide grooves 13 are provided in the guide sleeve 12, and the guide grooves 13 are horizontally arranged, and two limit plates 14 are fixedly provided on the mounting plate 1 and on one side of the guide sleeve 12, and the limit plates 14 are located on the outside of the guide sleeve 12, and the limit plates 14 are symmetrically arranged on the mounting plate 1, and are used for supporting and limiting the driving cover 3 rotatably arranged on the mounting plate 1.

[0027] One side of the mounting plate 1 is fixedly connected to the projection optical machine, and the other side is fixedly connected to a plurality of connecting columns, on which threaded holes are provided. An arc pressure ring 11 is fixedly provided on the connecting column. The arc pressure ring 11 is coaxially arranged with the guide sleeve 12, and the arc pressure ring 11 is used to limit the driving cover 3 so that the driving cover 3 can be rotatably installed on the guide sleeve 12, and the bolts pass through the arc pressure ring 11 and are connected to the threaded holes.

[0028] An array-distributed guide rail 23 is fixedly provided on the lens assembly 2, a mounting groove 21 is opened on the lens assembly 2, a lens assembly 5 is fixedly provided in the mounting groove 21, a symmetrically distributed guide column 22 is fixedly provided on the outer side of the lens assembly 2, the guide rail 23 is slidably connected to the guide groove 13, and the lens assembly 2 and the lens assembly 5 installed therein translate on the guide groove 13.

[0029] A driving gear 41 is fixedly provided at the output end of the driving motor 4, and the driving motor 4 controls the driving gear 41 to rotate. A gear ring 31 is fixedly provided at one end of the driving cover 3, and the gear ring 31 rotates in the arc-shaped pressure ring 11. The gear ring 31 is located on one side of the driving gear 41, and the gear ring 31 is meshed with the driving gear 41. A cam groove 32 is fixedly provided in the driving cover 3, and the cam groove 32 is an annular groove structure. The guide column 22 cooperates with the cam groove 32. After the driving cover 3 rotates forward, it can drive the lens assembly 2 to reciprocate and translate, thereby realizing telescopic movement.

[0030] The cam groove 32 is a curved groove, which is annularly closed and fixedly disposed in the driving cover 3 .

[0031] Here’s how it works:

[0032] During the projection process of the projection optical machine, the driving motor 4 is used to control the rotation of the driving gear 41, and then the driving gear 41 rotates to control the rotation of the driving cover 3, so that the driving cover 3 rotates continuously in one direction. The rotation of the driving cover 3 can be achieved through the cooperation of the cam groove 32 and the guide column 22 to realize the telescopic movement of the lens assembly 2 in the guide sleeve 12, omitting the optical coupling PCB board structure, simplifying the lens structure, facilitating assembly, and solving the software and hardware failure problems caused by the optical coupling PCB board.

[0033] At the same time, the driving cover 3 continues to rotate in the same direction to control the automatic telescopic movement of the lens assembly 2, and the movement is smooth and stable, and the automatic focusing function of the lens is realized at the same time, which saves costs and has a reliable and stable structure.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A telescopic zoom lens, the telescopic zoom lens is installed on a projection optical machine, characterized in that: The telescopic zoom lens comprises a mounting plate (1), the mounting plate (1) being fixed on a projection optical machine, a drive cover (3) being rotatably provided on the mounting plate (1), a lens assembly (2) being slidably provided in the drive cover (3), and a drive motor (4) being fixedly provided on one side of the drive cover (3); A lens assembly (5) is fixedly provided inside the lens assembly (2), a guide column (22) is symmetrically fixedly connected to the outer side of the lens assembly (2), a gear ring (31) is fixedly provided at one end of the drive cover (3), a cam groove (32) is fixedly provided inside the drive cover (3), and the guide column (22) cooperates with the cam groove (32).

2. The telescopic zoom lens according to claim 1, characterized in that: The mounting plate (1) is provided with a through groove, a guide sleeve (12) is fixed in the through groove, a horizontally arranged guide groove (13) is arranged in an array in the guide sleeve (12), two limit plates (14) are fixedly provided on the mounting plate (1) and located on one side of the guide sleeve (12), the limit plates (14) are located on the outside of the guide sleeve (12), and the limit plates (14) are symmetrically arranged on the mounting plate (1).

3. The telescopic zoom lens according to claim 2, characterized in that: A plurality of connecting columns are fixedly connected to one side of the mounting plate (1), and an arc-shaped pressing ring (11) for fixing the gear ring (31) is fixedly arranged on the connecting column. The arc-shaped pressing ring (11) is coaxially arranged with the guide sleeve (12).

4. The telescopic zoom lens according to claim 2, characterized in that: The lens assembly (2) is fixedly provided with guide rails (23) distributed in an array, the lens assembly (2) is provided with a mounting groove (21) for mounting the lens assembly (5), and the guide rails (23) cooperate with the guide grooves (13).

5. The telescopic zoom lens according to claim 1, characterized in that: A driving gear (41) is fixedly provided at the output end of the driving motor (4).

6. The telescopic zoom lens according to claim 5, characterized in that: The gear ring (31) is located on one side of the driving gear (41), and the gear ring (31) cooperates with the driving gear (41).

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