Projector lens module with interchangeable lens optical structure

Abstract

The utility model discloses a projector lens module with an interchangeable lens optical structure, which comprises a fixed cylinder, a mounting plate is arranged on the fixed cylinder, and the fixed cylinder is fixedly mounted; the movable lens barrel is movably installed in the fixed barrel, and the movable lens barrel and the fixed barrel are in spiral connection through a spiral structure. According to the projector lens module with the interchangeable lens optical structure provided by the utility model, the telescopic focusing of the lens is realized through the spiral structure, the requirements of different projection distances and scenes can be met, the focusing range is wide, and the focusing precision is high. Meanwhile, due to the design of the lens module, the optical structure can be conveniently and rapidly disassembled and replaced, the cheap prime lens can also adapt to different application scenes, and the use flexibility and economic applicability of equipment are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lens field, concretely relates to a projector lens module of interchangeable lens optical structure. BACKGROUND

[0002] As a display device widely used in the fields of home entertainment, business meeting, education and the like, the performance requirement of the projector is continuously improved with the diversification of user demand. The lens of the traditional projector usually adopts a fixed focus lens, which can meet the basic projection requirement, but in different application scenarios, the user has different requirements for the focal length of the lens, and the use of cheap fixed focus lens cannot meet the different application scenarios, the use of zoom lens is too expensive, and once the application scenario of the projector is determined, it does not need to be zoomed any more, so the use of expensive zoom lens will cause great waste.

[0003] The existing projector lens focusing system cannot quickly replace the lens.

[0004] Therefore, there is an urgent need in the prior art for a lens structure that can take into account different application scenarios and cheap fixed focus lenses. By quickly replacing the fixed focus lens, the cheap fixed focus lens can adapt to more application scenarios. UTILITY MODEL CONTENT

[0005] In order to solve the above problems, the utility model provides a projector lens module of interchangeable lens optical structure, aims at solving the problems of limited lens focusing range, high maintenance difficulty and short service life in the prior art, and can realize quick disassembly and assembly of the lens while improving the focusing precision, and is more suitable for high-performance projector products.

[0006] The utility model is realized through the following technical schemes: a projector lens module of interchangeable lens optical structure, including fixed cylinder, be provided with an installation plate on the fixed cylinder, the fixed cylinder is fixedly installed;

[0007] Movable lens barrel, the movable lens barrel is movably installed in the fixed cylinder, and the movable lens barrel and the fixed cylinder are connected through a spiral structure in a spiral manner.

[0008] Drive shaft sleeve, one end of the drive shaft sleeve is sleeved outside the fixed cylinder, the other end of the drive sleeve extends outside the fixed cylinder, the drive shaft sleeve and the movable lens barrel are connected in a circumferential direction through a linkage mechanism, and when the drive shaft sleeve rotates in a circumferential direction, the movable lens barrel is driven to rotate in a circumferential direction.

[0009] The movable lens barrel is provided with a lens module, and the lens module is screwed and pressed outside the movable lens barrel.

[0010] When the movable lens barrel rotates relative to the fixed barrel, the movable lens barrel is made to perform a telescopic action relative to the fixed barrel through the screw structure, so that focusing is achieved.

[0011] As a preferred technical solution, the linkage mechanism comprises a plurality of linkage shafts arranged on the circumferential surface of the movable lens barrel, and a limiting sliding groove arranged on the inner wall surface of the drive shaft sleeve, the linkage shafts are buckled into the limiting sliding groove, and the linkage shafts can reciprocate in the length direction of the limiting sliding groove.

[0012] As a preferred technical solution, the screw structure comprises a screw convex part arranged on the inner wall surface of the fixed barrel and a corresponding screw groove arranged on the outer wall surface of the movable lens barrel, the screw convex part is buckled into the screw groove, and when the movable lens barrel rotates, the movable lens barrel is made to perform a telescopic reciprocating action in the axial direction relative to the fixed barrel through the screw convex part and the screw groove.

[0013] As a preferred technical solution, the drive shaft sleeve is externally provided with a gear ring, a driving motor is fixedly installed on the mounting plate, a driving gear is installed on the motor shaft of the driving motor, the driving gear is engaged with the gear ring, the circumferential rotation of the drive shaft sleeve is driven by the driving motor, and the circumferential rotation of the movable lens barrel is driven by the linkage mechanism.

[0014] As a preferred technical solution, the movable lens barrel is externally provided with an external thread segment, the threaded gland is in threaded engagement with the external thread segment, and the screw directions of the external thread segment and the threaded gland are reversely arranged.

[0015] As a preferred technical solution, a limiting sleeve is further included, the drive shaft sleeve is limited relative to the mounting plate through the limiting sleeve, and the drive shaft sleeve, the movable lens barrel and the lens module inside are taken out after the limiting sleeve is removed.

[0016] The projector lens module with replaceable lens optical structure has the advantages that: the telescopic focusing of the lens is realized through the screw structure, different projection distances and scene requirements can be adapted, the focusing range is wide, and the precision is high.

[0017] In different application scenarios, the user can conveniently replace the entire lens optical structure module and select a fixed-focus lens with a suitable focal length. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a schematic diagram of the cross section of the present application Figure 1 ;

[0021] Figure 3 It is a schematic diagram of the cross section of the present application Figure 2 ;

[0022] Figure 4 It is a partial schematic diagram of the present application.

[0023] Explanation of reference signs:

[0024] 1, fixed cylinder; 10, mounting plate; 13, movable lens barrel; 2, drive shaft sleeve; 8, lens module; 6, threaded gland; 14, linkage shaft; 5, limiting sliding groove; 11, spiral convex part; 12, spiral groove; 3, gear ring; 4, drive motor; 7, drive gear; 9, limiting sleeve. DETAILED DESCRIPTION

[0025] All features disclosed in this specification, and / or the steps of any method or process specified in this specification, can be combined in any combination, except where it is specifically stated otherwise.

[0026] Any feature disclosed in this specification, unless stated otherwise, can be replaced by any equivalent or other technically equivalent feature. That is, unless stated otherwise, each feature is one of a range of equivalent or similar features.

[0027] As shown in Figures 1-4 The present application is a lens module of a projector with interchangeable lens optical structure, which comprises a fixed cylinder 1, an installation plate 10 is arranged on the fixed cylinder 1, and the fixed cylinder 1 is fixedly installed.

[0028] Further comprising a movable lens barrel 13, the movable lens barrel 13 is movably installed in the fixed cylinder 1, and the movable lens barrel 13 and the fixed cylinder 1 are connected through a spiral structure.

[0029] It also includes a drive bushing 2, one end of which is fitted onto the outside of the fixed cylinder 1, and the other end extends out of the outside of the fixed cylinder 1. The drive bushing 2 and the movable lens barrel 13 are linked in the circumferential direction through a linkage mechanism. When the drive bushing 2 rotates in the circumferential direction, it drives the movable lens barrel 13 to move in the circumferential direction.

[0030] The movable lens barrel 13 is equipped with a lens module 8, and the lens module 8 is externally pressed by a threaded cover 6.

[0031] When the movable lens barrel rotates circumferentially relative to the fixed barrel 1, the spiral structure causes the movable lens barrel to extend and retract relative to the fixed barrel 1, thereby achieving focusing. The movable lens barrel 13 can move back and forth along the axial direction of the fixed barrel 1 with the lens module 8.

[0032] The linkage mechanism includes multiple linkage shafts 14 disposed on the circumferential surface of the movable lens barrel 13, and a limiting groove 5 disposed on the inner wall surface of the drive shaft sleeve 2. The linkage shafts 14 are slidably engaged into the limiting groove 5, and the linkage shafts 14 can slide back and forth in the length direction of the limiting groove 5 to achieve focusing.

[0033] Among them, such as Figure 4 As shown, the spiral structure includes a spiral protrusion 11 disposed on the inner wall of the fixed cylinder 1, and a corresponding spiral groove 12 disposed on the outer wall of the movable lens barrel 13. The spiral protrusion 11 is inserted into the spiral groove 12. When the movable lens barrel 13 rotates circumferentially, the spiral protrusion 11 and the spiral groove 12 cause the movable lens barrel 13 to reciprocate in the axial direction relative to the fixed cylinder 1.

[0034] Among them, such as Figure 1 and Figure 2 As shown, a gear ring 3 is provided on the outside of the drive shaft sleeve 2, and a drive motor 4 is fixedly installed on the mounting plate 10. A drive gear 7 is installed on the motor shaft of the drive motor 4. The drive gear 7 meshes with the gear ring 3. The drive motor 4 drives the drive shaft sleeve 2 to rotate circumferentially, and drives the movable lens barrel 13 to rotate circumferentially through the linkage mechanism.

[0035] The movable lens barrel 13 is provided with an external threaded section. The threaded cap 6 is threadedly engaged with the external threaded section. The external threaded section and the threaded cap 6 are set in opposite directions. Because they are set in opposite directions, the threaded cap 6 cannot be rotated off in the normal rotation direction. It can only be disassembled by rotating in the opposite direction. This is different from the traditional thread rotation direction, which avoids misoperation.

[0036] The limit sleeve 9 is used for limiting the driving shaft sleeve 2 relative to the mounting plate 10, and the driving shaft sleeve 2, the movable lens barrel 13 and the lens module 8 in the driving shaft sleeve 2 can be taken out after the limit sleeve 9 is removed, so that when the lens module 8 needs to be disassembled, only the limit sleeve 9 needs to be disassembled, for example, if the limit sleeve 9 is fixed by screws, the limit sleeve 9 can be taken down by loosening the screws, and then the whole lens assembly can be horizontally taken down.

[0037] The projector lens module with interchangeable lens optical structure provided by the utility model realizes the telescopic focusing of the lens through the screw structure, can adapt to the requirements of different projection distances and scenes, has a wide focusing range and high precision.

[0038] In different application scenarios, the user can conveniently replace the whole lens optical structure module, improving the application scenarios of the fixed-focus lens.

[0039] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any change or replacement without creative labor should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited by the protection scope defined in the claims.

Claims

1. A projector lens module with an interchangeable lens optical structure, characterized in that, include: A fixed cylinder (1) is provided with an mounting plate (10) and the fixed cylinder (1) is fixedly installed; Movable lens barrel (13), the movable lens barrel (13) is movably installed inside the fixed tube (1), and the movable lens barrel (13) and the fixed tube (1) are connected by a spiral structure; Drive bushing (2), one end of the drive bushing (2) is fitted outside the fixed cylinder (1), and the other end extends outside the fixed cylinder (1). The drive bushing (2) and the movable lens tube (13) are linked in the circumferential direction through a linkage mechanism. When the drive bushing (2) rotates in the circumferential direction, it drives the movable lens tube (13) to move in the circumferential direction. The movable lens barrel (13) is equipped with a lens module (8), and the lens module (8) is screwed on the outside by a threaded cover (6); When the movable lens barrel rotates circumferentially relative to the fixed cylinder (1), the spiral structure causes the movable lens barrel to extend or retract relative to the fixed cylinder (1), thereby achieving focusing.

2. The projector lens module with an interchangeable lens optical structure according to claim 1, characterized in that: The linkage mechanism includes multiple linkage shafts (14) disposed on the circumferential surface of the movable lens barrel (13) and a limiting groove (5) disposed on the inner wall surface of the drive shaft sleeve (2). The linkage shafts (14) slide into the limiting groove (5) and can slide back and forth in the length direction of the limiting groove (5).

3. The projector lens module with an interchangeable lens optical structure according to claim 1, characterized in that: The spiral structure includes a spiral protrusion (11) disposed on the inner wall of the fixed cylinder (1) and a corresponding spiral groove (12) disposed on the outer wall of the movable lens tube (13). The spiral protrusion (11) is inserted into the spiral groove (12). When the movable lens tube (13) rotates circumferentially, the spiral protrusion (11) and the spiral groove (12) cause the movable lens tube (13) to reciprocate in the axial direction relative to the fixed cylinder (1).

4. The projector lens module with an interchangeable lens optical structure according to claim 1, characterized in that: A gear ring (3) is provided on the outside of the drive bushing (2). A drive motor (4) is fixedly installed on the mounting plate (10). A drive gear (7) is installed on the motor shaft of the drive motor (4). The drive gear (7) meshes with the gear ring (3). The drive motor (4) drives the drive bushing (2) to rotate circumferentially, and drives the movable lens barrel (13) to rotate circumferentially through the linkage mechanism.

5. The projector lens module with an interchangeable lens optical structure according to claim 1, characterized in that: The movable lens barrel (13) is provided with an external thread section. The threaded cap (6) is threadedly engaged with the external thread section. The spiral directions of the external thread section and the threaded cap (6) are opposite.

6. The projector lens module with an interchangeable lens optical structure according to claim 1, characterized in that: It also includes a limiting sleeve (9) to limit the drive shaft sleeve (2) relative to the mounting plate (10). After removing the limiting sleeve (9), the drive shaft sleeve (2), the movable lens barrel (13) and the lens module (8) inside are taken out.

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