Projector lens displacement adjustment mechanism, adjustment method and projector

Abstract

The present invention discloses a projector lens displacement adjustment mechanism, an adjustment method and a projector, comprising a mechanism fixing bracket; a first sliding module, which is arranged in front of the mechanism fixing bracket, the first sliding module having a first motor, a first screw rod, a first driving gear, a first driven gear and a first sliding module; a second sliding module, which is arranged in front of the first sliding module, the second sliding module having a second motor, a second screw rod, a second driving gear, a second driven gear and a second sliding module; and a lens mounting module, which is arranged in front of the second sliding module, the lens mounting module having a lens mounting bracket and a bracket adjustment component. The present invention has the beneficial effects that the first sliding module and the second sliding module have the characteristics of simple structure, few components and low cost.

Description

Technical Field

[0001] The invention relates to a projection device, in particular to a projector lens displacement adjustment mechanism, an adjustment method and a projector. Background Art

[0002] At present, the projector lens displacement structure can generally achieve horizontal (left and right) and vertical (up and down) adjustment. It consists of a mounting bracket, a drive module, a slide bar, a horizontal sliding module, a vertical sliding module, a lens mounting module, etc. The drive module is generally composed of a stepper motor + gear pair or a stepper motor + a worm gear pair. The existing design uses a gear pair or a worm gear pair to achieve the transmission of staggered axes. The structure is compact, but the number of components is relatively large, the calculation is complex, and the processing and assembly precision requirements are relatively high. In actual production, the displacement mechanism occasionally gets stuck. In addition, as the running time increases, the wear between the gear pair / worm pair will increase, the noise of the product will become louder, and the stability will decrease, affecting the service life of the overall equipment. Summary of the invention

[0003] The technical problem to be solved by the present invention is the drawbacks of a large number of components in the prior art, and a novel projector displacement adjustment mechanism, adjustment method and projector are provided.

[0004] In order to achieve this purpose, the technical solution of the present invention is as follows: a projector lens displacement adjustment mechanism, comprising:

[0005] Mechanism fixing bracket;

[0006] A first sliding module, comprising a first motor, a first ball screw and a first sliding module, wherein a plane where the first sliding module is located is arranged front and back in parallel with a plane where the mechanism fixing bracket is located, the first motor is fixed to the mechanism fixing bracket, a motor shaft of the first motor and a screw in the first ball screw both extend in a vertical direction, the screw in the first ball screw is arranged between the mechanism fixing bracket and the first sliding module, a first driving gear is fixed to the motor shaft of the first motor, a first driven gear meshing with the first driving gear is fixed to the screw in the first ball screw, and a nut in the first ball screw is fixedly connected to the first sliding module, so that the first motor can drive the first sliding module to shift in a vertical direction through the first driving gear, the first driven gear and the first ball screw;

[0007] A second sliding module, comprising a second motor, a second ball screw and a second sliding module, wherein the plane where the second sliding module is located is arranged front and back in parallel with the plane where the first sliding module is located, the second motor is fixed to the first sliding module, the motor shaft of the second motor extends in the vertical direction, the screw of the second ball screw extends in the horizontal direction, the screw in the second ball screw is arranged between the first sliding module and the second sliding module, a second driving gear is fixed on the motor shaft of the second motor, a second driven gear meshing with the second driving gear is fixed on the screw of the second ball screw, and a nut in the second ball screw is fixedly connected to the second sliding module, so that the second motor can drive the second sliding module to shift in the horizontal direction through the second driving gear, the second driven gear and the second ball screw; and,

[0008] A lens mounting module, comprising a lens mounting bracket and a bracket adjustment component, wherein the plane where the lens mounting bracket is located is arranged front and back in parallel with the plane where the second sliding module is located, the number of the bracket adjustment component is at least one, the bracket adjustment component comprising a bracket extension, a third driving gear, a third driven gear, a front-to-back screw and a front-to-back spring, the bracket extension is integrated with the lens mounting bracket and is located in the same plane, the third driving gear and the third driven gear are both arranged in front of the bracket extension and the two are meshed, the front-to-back screw passes through the second sliding module, the bracket extension and the third driven gear in sequence, the front-to-back spring is arranged between the bracket extension and the second sliding module and surrounds the periphery of the front-to-back screw, the front-to-back spring is in a compressed state, so that the third driving gear can drive the third driven gear to shift forward and backward along the front-to-back screw to change the compression amount of the front-to-back spring, thereby adjusting the distance between the second sliding module and the lens mounting bracket.

[0009] As a preferred solution for the projector lens displacement adjustment mechanism, a semicircular groove with a thread is formed on the back of the first sliding module, that is, the nut in the first ball screw; a semicircular groove with a thread is formed on the back of the second sliding module, that is, the nut in the second ball screw.

[0010] As a preferred solution of the projector lens displacement adjustment mechanism, the first driving gear and the first driven gear are both spur gears, the second driving gear and the second driven gear are both bevel gears, and the third driving gear and the third driven gear are both spur gears.

[0011] As a preferred solution of the projector lens displacement adjustment mechanism, the first motor and / or the second motor is a stepping motor.

[0012] As a preferred solution for the projector lens displacement adjustment mechanism, the first sliding module also has a first spring sheet pressing block, the first spring sheet pressing block is located in front of the first sliding module, the first spring sheet pressing block has a fixed end and a movable end, the fixed end of the first spring sheet pressing block is fixed to the mechanism fixing bracket, and the movable end of the first spring sheet pressing block is pressed onto the first sliding module at the rear; further, the first sliding module is a square plate body, and the number of the first spring sheet pressing blocks is four and they are respectively arranged at the four corners of the first sliding module.

[0013] As a preferred solution for the projector lens displacement adjustment mechanism, the second sliding module also has a second spring sheet pressing block, the second spring sheet pressing block is located in front of the second sliding module, the second spring sheet pressing block has a fixed end and a movable end, the fixed end of the second spring sheet pressing block is fixed on the first sliding module, and the movable end of the second spring sheet pressing block is pressed onto the second sliding module from behind; further, the second sliding module is a square plate body, and the number of the second spring sheet pressing blocks is four and they are respectively arranged at the four corners of the second sliding module.

[0014] As a preferred solution of the projector lens displacement adjustment mechanism, the lens mounting bracket is a circular plate, and the number of the bracket adjustment components is three and they are arranged at intervals of 120° along the periphery of the lens mounting bracket.

[0015] The present invention also provides a projector lens displacement adjustment method, comprising the following steps:

[0016] Step S1, providing a projector lens displacement adjustment mechanism;

[0017] Step S2, adjusting the lens mounting bracket to a specified position, wherein the adjustment method includes displacement along the vertical direction, displacement along the horizontal direction, displacement along the front-back direction, and adjustment of the plane angle.

[0018] As a preferred solution of a projector lens displacement adjustment method, the plane angle adjustment is as follows: the third driving gear is rotated, and the third driving gear drives the third driven gear to shift forward and backward along the forward and backward screw to change the compression amount of the forward and backward spring, thereby adjusting the distance between the second sliding module and the lens mounting bracket.

[0019] The present invention also provides a projector, comprising:

[0020] projection lens; and,

[0021] Projector lens displacement adjustment mechanism;

[0022] Wherein, the projection lens is fixed on the lens mounting bracket.

[0023] Compared with the prior art, the beneficial effects of the present invention are at least as follows: 1. The first sliding module, the second sliding module and the lens installation module have the characteristics of simple structure, few components and low cost; 2. The difficulty of product selection is reduced, and the first motor and the second motor with rated thrust can be selected only according to the weight of the lens, the first sliding module and the second sliding module. 3. The rotary pair formed by the first motor (the second motor) and the first ball screw (the second ball screw) has the advantages of high reliability and low noise.

[0024] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the beneficial effects brought about by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the beneficial effects brought about by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention (assembled state).

[0026] Figure 2 It is a schematic structural diagram of an embodiment of the present invention (exploded state).

[0027] Figure 3 It is a schematic structural diagram of an embodiment of the present invention (lens omitted).

[0028] Figure 4 This is a schematic structural diagram of an embodiment of the present invention (leaving out the lens and the lens mounting module).

[0029] Figure 5 Schematic diagram of the structure of the first sliding module in one embodiment of the present invention.

[0030] Figure 6 It is a schematic structural diagram of a bracket adjustment component in one embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below by means of specific embodiments connected with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] See also Figures 1 to 6 , the figure shows a new type of projector lens displacement adjustment mechanism, which can be applied to laser projectors or other projection equipment.

[0033] The projector lens displacement adjustment mechanism is composed of a mechanism fixing bracket 1, a first sliding module 2, a second sliding module 3, a lens installation module 4 and other components.

[0034] The mechanism fixing bracket 1 is a square plate.

[0035] The first sliding module 2 has a first motor 21, a first ball screw and a first sliding module 22. The plane where the first sliding module 22 is located is arranged front and back in parallel with the plane where the mechanism fixing bracket 1 is located. The first motor 21 is fixed to the mechanism fixing bracket 1 through an L-shaped bracket. The first motor 21 can be a stepping motor. The motor shaft of the first motor 21 and the screw 23 in the first ball screw both extend in the vertical direction. The screw 23 in the first ball screw is arranged between the mechanism fixing bracket 1 and the first sliding module 22. A first driving gear 24 is fixed to the motor shaft of the first motor 21. A first driven gear 25 meshing with the first driving gear 24 is fixed to the screw 23 in the first ball screw. The first driving gear 24 and the first driven gear 25 are both spur gears. The nut 26 in the first ball screw is fixedly connected to the first sliding module 22. Preferably, the nut 26 in the first ball screw is designed as an integral unit with the first sliding module 22, and a semicircular groove with a thread is formed at the rear of the first sliding module 22, which serves as the nut 26 in the first ball screw. Thereby, the first motor 21 can drive the first sliding module 22 to shift in the vertical direction through the first driving gear 24, the first driven gear 25 and the first ball screw. In order to ensure the stability of the first sliding module 22 during the shifting process, the first sliding module 2 also has a first spring sheet pressing block 27. The first spring sheet pressing block 27 is located in front of the first sliding module 22. The first spring sheet pressing block 27 has a fixed end and a movable end. The fixed end of the first spring sheet pressing block 27 is fixed to the mechanism fixing bracket 1. The movable end of the first spring sheet pressing block 27 is pressed on the first sliding module 22 at the rear. Preferably, the first sliding module 22 is a square plate, and the number of the first spring sheet pressing blocks 27 is four and they are respectively arranged at the four corners of the first sliding module 22. Please refer to Figure 5 In order to vertically position the screw 23 of the first ball screw, a positioning sleeve 28 and a limiting groove (limiting spring) 29 may be used.

[0036] The second sliding module 3 has a similar structure to the first sliding module 2. The second sliding module 3 comprises a second motor 31, a second ball screw and a second sliding module 32. The plane where the second sliding module 32 is located is arranged front and back in parallel with the plane where the first sliding module 22 is located. The second motor 31 is fixed to the first sliding module 22 through an L-shaped bracket. The second motor 31 may be a stepping motor. The motor shaft of the second motor 31 extends in the vertical direction. The screw 33 in the second ball screw extends in the horizontal direction. The screw 33 in the second ball screw is arranged between the first sliding module 22 and the second sliding module 32. A second driving gear 34 is fixed to the motor shaft of the second motor 31. A second driven gear 35 meshing with the second driving gear 34 is fixed to the screw of the second ball screw. The second driving gear 34 and the second driven gear 35 are both bevel gears. The nut in the second ball screw is fixedly connected to the second sliding module 32. Preferably, the nut in the second ball screw is designed as an integral unit with the second sliding module 32, and a semicircular groove with a thread is formed at the rear of the second sliding module 32, that is, the nut in the second ball screw. In this way, the second motor 31 can drive the second sliding module 32 to shift in the horizontal direction through the second driving gear 34, the second driven gear 35 and the second ball screw. In order to ensure the stability of the second sliding module 32 during the shifting process, the second sliding module 3 also has a second spring piece pressing block 27. The second spring piece pressing block 27 is located in front of the second sliding module 32. The second spring piece pressing block 27 has a fixed end and a movable end. The fixed end of the second spring piece pressing block 27 is fixed to the first sliding module 22. The movable end of the second spring piece pressing block 27 is pressed on the second sliding module 32 at the rear. Further, the second sliding module 32 is a square plate, and the number of the second spring piece pressing blocks 27 is four and they are respectively arranged at the four corners of the second sliding module 32.

[0037] The lens mounting module 4 has a lens mounting bracket 41 and a bracket adjustment assembly 42. The plane where the lens mounting bracket 41 is located is arranged parallel to the plane where the second sliding module 32 is located. The lens mounting bracket 41 is a circular plate. The number of the bracket adjustment assemblies 42 is three and they are arranged 120° apart along the periphery of the lens mounting bracket 41. The bracket adjustment assembly 42 has a bracket extension 421, a third driving gear 423, a third driven gear 422, a front-to-back screw 424 and a front-to-back spring 425. The bracket extension 421 is integrated with the lens mounting bracket 41 and is located in the same plane. The third driving gear 423 and the third driven gear 422 are both arranged in front of the bracket extension 421 and meshed with each other. The third driving gear 423 and the third driven gear 422 are both spur gears. The front-to-back screw 424 passes through the second sliding module 32, the bracket extension 421 and the third driven gear 422 in sequence. The front-to-back screw 424 is fixed to the second sliding module 32. The front-to-back spring 425 is arranged between the bracket extension 421 and the second sliding module 32 and surrounds the periphery of the front-to-back screw 424. The front-to-back spring 425 is in a compressed state. The third driving gear 423 can drive the third driven gear 422 to shift forward and backward along the front-to-back screw 424 to change the compression amount of the front-to-back spring 425, thereby adjusting the distance between the second sliding module 32 and the lens mounting bracket 41.

[0038] Usage method: adjust the lens mounting bracket 41 to a specified position, wherein the adjustment methods include displacement in the vertical direction, displacement in the horizontal direction, displacement in the front-back direction, and adjustment of the plane angle.

[0039] The displacement along the vertical direction: the first motor 21 can drive the first sliding module 22 to shift along the vertical direction through the first driving gear 24 , the first driven gear 25 and the first ball screw.

[0040] The displacement along the horizontal direction: the second motor 31 can drive the second sliding module 32 to displace along the horizontal direction through the second driving gear 34 , the second driven gear 35 and the second ball screw.

[0041] The displacement along the front-to-back direction: synchronously adjusting the three bracket adjustment components 42.

[0042] The plane angle adjustment: only one or two of the three bracket adjustment components 42 are adjusted.

[0043] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A projector lens displacement adjustment mechanism, characterized in that: Contains: Mechanism fixing bracket; A first sliding module, comprising a first motor, a first ball screw and a first sliding module, wherein a plane where the first sliding module is located is arranged front and back in parallel with a plane where the mechanism fixing bracket is located, the first motor is fixed to the mechanism fixing bracket, a motor shaft of the first motor and a screw in the first ball screw both extend in a vertical direction, the screw in the first ball screw is arranged between the mechanism fixing bracket and the first sliding module, a first driving gear is fixed to the motor shaft of the first motor, a first driven gear meshing with the first driving gear is fixed to the screw in the first ball screw, and a nut in the first ball screw is fixedly connected to the first sliding module, so that the first motor can drive the first sliding module to shift in a vertical direction through the first driving gear, the first driven gear and the first ball screw; A second sliding module, comprising a second motor, a second ball screw and a second sliding module, wherein the plane where the second sliding module is located is arranged front and back in parallel with the plane where the first sliding module is located, the second motor is fixed to the first sliding module, the motor shaft of the second motor extends in the vertical direction, the screw of the second ball screw extends in the horizontal direction, the screw in the second ball screw is arranged between the first sliding module and the second sliding module, a second driving gear is fixed on the motor shaft of the second motor, a second driven gear meshing with the second driving gear is fixed on the screw of the second ball screw, and a nut in the second ball screw is fixedly connected to the second sliding module, so that the second motor can drive the second sliding module to shift in the horizontal direction through the second driving gear, the second driven gear and the second ball screw; and, A lens mounting module, comprising a lens mounting bracket and a bracket adjustment component, wherein the plane where the lens mounting bracket is located is arranged front and back in parallel with the plane where the second sliding module is located, the number of the bracket adjustment component is at least one, the bracket adjustment component comprising a bracket extension, a third driving gear, a third driven gear, a front-to-back screw and a front-to-back spring, the bracket extension is integrated with the lens mounting bracket and is located in the same plane, the third driving gear and the third driven gear are both arranged in front of the bracket extension and the two are meshed, the front-to-back screw passes through the second sliding module, the bracket extension and the third driven gear in sequence, the front-to-back spring is arranged between the bracket extension and the second sliding module and surrounds the periphery of the front-to-back screw, the front-to-back spring is in a compressed state, so that the third driving gear can drive the third driven gear to shift forward and backward along the front-to-back screw to change the compression amount of the front-to-back spring, thereby adjusting the distance between the second sliding module and the lens mounting bracket.

2. The projector lens displacement adjustment mechanism according to claim 1, characterized in that: A semicircular groove with a thread is formed at the rear of the first sliding module, namely the nut in the first ball screw; a semicircular groove with a thread is formed at the rear of the second sliding module, namely the nut in the second ball screw.

3. The projector lens displacement adjustment mechanism according to claim 1, characterized in that: The first driving gear and the first driven gear are both spur gears, the second driving gear and the second driven gear are both bevel gears, and the third driving gear and the third driven gear are both spur gears.

4. The projector lens displacement adjustment mechanism according to claim 1, characterized in that: The first motor and the second motor are both stepper motors.

5. The projector lens displacement adjustment mechanism according to any one of claims 1 to 4, characterized in that: The first sliding module also has a first spring sheet pressing block, which is located in front of the first sliding module. The first spring sheet pressing block has a fixed end and a movable end. The fixed end of the first spring sheet pressing block is fixed to the mechanism fixing bracket, and the movable end of the first spring sheet pressing block is pressed onto the first sliding module from behind. The first sliding module is a square plate body, and the number of the first spring sheet pressing blocks is four and they are respectively arranged at the four corners of the first sliding module.

6. The projector lens displacement adjustment mechanism according to any one of claims 1 to 4, characterized in that: The second sliding module also has a second spring sheet pressing block, which is located in front of the second sliding module. The second spring sheet pressing block has a fixed end and a movable end. The fixed end of the second spring sheet pressing block is fixed on the first sliding module, and the movable end of the second spring sheet pressing block is pressed on the second sliding module from behind. The second sliding module is a square plate body, and the number of the second spring sheet pressing blocks is four and they are respectively arranged at the four corners of the second sliding module.

7. The projector lens displacement adjustment mechanism according to any one of claims 1 to 4, characterized in that: The lens mounting bracket is a circular plate body, and the number of the bracket adjustment components is three and they are arranged at 120° staggered along the periphery of the lens mounting bracket.

8. A method for adjusting the displacement of a projector lens, characterized in that: It includes the following steps: Step S1, providing a projector lens displacement adjustment mechanism as described in any one of claims 1 to 4; Step S2, adjusting the lens mounting bracket to a specified position, wherein the adjustment methods include displacement in the vertical direction, displacement in the horizontal direction, displacement in the front-back direction and adjustment of the plane angle.

9. The projector lens displacement adjustment method according to claim 8, characterized in that: The plane angle adjustment: the third driving gear is rotated, and the third driving gear drives the third driven gear to shift forward and backward along the forward and backward screw to change the compression amount of the forward and backward spring, thereby adjusting the distance between the second sliding module and the lens mounting bracket.

10. A projector, characterized in that Contains: Projection lens; as well as, The projector lens displacement adjustment mechanism according to any one of claims 1 to 4; Wherein, the projection lens is fixed on the lens mounting bracket.

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