Optical machine structure and projector

Abstract

The utility model relates to an optical-mechanical structure and a projector. The ray machine structure comprises a ray machine shell, a lens cone assembly, a motor and a focusing barrel, the lens cone assembly is arranged at the front end of the ray machine shell, the lens cone assembly is arranged in the focusing barrel, the lens cone assembly and the focusing barrel are coaxial, and the focusing barrel is used for adjusting the focal length of the lens cone assembly; the light machine shell comprises an inclined back plate, the inclined back plate is arranged behind the lens cone assembly, the motor is arranged on the outer side of the inclined back plate, an arc-shaped rack is arranged on the outer wall of the focusing barrel, a gear shaft is arranged between the arc-shaped rack and the motor, a front end gear of the gear shaft is meshed with the arc-shaped rack, and the rear end of the gear shaft and an output shaft of the motor are connected and rotate synchronously. According to the technical scheme, the motor is arranged behind the lens cone assembly, so that the motor does not occupy too much lateral space of the lens cone assembly, more space can be saved in the lateral direction of the lens cone assembly, layout of other parts is facilitated, and the overall structural design flexibility of the projector is improved.

Description

Technical Field

[0001] The present application relates to a projection device, and more specifically to an optical engine structure and a projector. Background Art

[0002] A projector is a device that can project images or videos onto a white wall or a screen. Generally, when a home projector is used, the focal length sometimes needs to be adjusted to make the projected image clearer. Common structures for adjusting the focal length of a projector include a manual focusing structure and an automatic focusing structure. The automatic focusing structure generally uses a motor to drive a gear structure to drive the lens barrel to move back and forth. The motor and the gear structure are usually arranged on the side of the lens barrel, and the motor and the gear structure occupy a large lateral space, which is not conducive to the layout of other components and needs to be improved. Summary of the Utility Model

[0003] The purpose of the present application is to overcome the above deficiencies of the prior art and provide an optical engine structure and a projector to reduce the lateral space occupied by the motor.

[0004] To achieve the above purpose, the present application adopts the following technical solutions: An optical engine structure, which includes an optical engine housing, a lens barrel assembly, a motor, and a focusing barrel. The lens barrel assembly is arranged at the front end of the optical engine housing. The lens barrel assembly is arranged in the focusing barrel and is coaxial with the focusing barrel. The focusing barrel is used to adjust the focal length of the lens barrel assembly. The optical engine housing includes an inclined back plate, which is arranged behind the lens barrel assembly. The motor is arranged at the outer side of the inclined back plate. An arc-shaped rack is arranged on the outer wall of the focusing barrel. A gear shaft is arranged between the arc-shaped rack and the motor. The front gear of the gear shaft meshes with the arc-shaped rack, and the rear end of the gear shaft is connected to the output shaft of the motor and rotates synchronously.

[0005] In an alternative embodiment, a reflecting mirror surface is arranged on the inner side of the inclined back plate, and the light reflected from the reflecting mirror surface is incident into the lens barrel assembly.

[0006] In an alternative embodiment, the rear end of the gear shaft is connected to the output shaft of the motor through a coupling cylinder.

[0007] In an alternative embodiment, a support cylinder is arranged at the top of the optical engine housing. The gear shaft passes through the support cylinder and is coaxial with the support cylinder.

[0008] In an alternative embodiment, a positioning groove is arranged on the outer side wall of the inclined back plate. The lower part of the motor is placed in the positioning groove, and both sides of the motor are respectively fixedly connected to the horizontal internal thread cylinders on the outer side wall of the inclined back plate through screws.

[0009] In an alternative embodiment, the lens barrel assembly includes a fixed barrel and a lens barrel. The fixed barrel is relatively fixed to the optical engine housing. The fixed barrel penetrates into the focusing barrel and is coaxial with it. The lens barrel penetrates into the fixed barrel and is coaxial with it. The lens barrel is slidably connected to the fixed barrel.

[0010] In an alternative solution, radial columns are provided on the outer wall of the lens barrel. The radial columns penetrate through the axial holes of the fixed cylinder and enter the inclined holes of the focusing cylinder wall. The axial holes of the fixed cylinder are used to restrict the linear movement of the lens barrel relative to the fixed cylinder. When the focusing cylinder rotates around the central axis, the inclined holes are used to drive the axial linear movement of the lens barrel through the radial columns.

[0011] In an alternative solution, limit columns are provided on the outer wall of the fixed cylinder, and circumferential limit holes are provided on the wall of the focusing cylinder. The limit columns penetrate into the circumferential limit holes so that the focusing cylinder only has the freedom of axial rotation relative to the fixed cylinder.

[0012] In an alternative solution, the opto-mechanical housing is provided with a cleaning window, and a cleanable cleaning cover is provided at the cleaning window. The position of the cleaning window corresponds to the lens and the display screen inside the opto-mechanical housing.

[0013] This application also discloses a projector, which includes the above opto-mechanical structure.

[0014] In the technical solution of this application, the motor is placed behind the inclined back plate of the opto-mechanical housing, that is, the motor is rear-mounted relative to the lens barrel assembly, so that the motor does not occupy too much lateral space of the lens barrel assembly. More space can be saved laterally for the layout of other components, improving the flexibility of the overall structural design of the projector.

[0015] The above description is only an overview of the technical solution of this application. In order to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following preferred embodiments are specifically described in detail as follows. Brief Description of the Drawings

[0016] Figure 1 Is a three-dimensional view of the opto-mechanical structure of this application (cleaning cover closed).

[0017] Figure 2 Is a three-dimensional view of the opto-mechanical structure of this application (cleaning cover open).

[0018] Figure 3 Is a partial exploded view of the opto-mechanical structure of this application.

[0019] Figure 4 Is a three-dimensional view of the opto-mechanical structure of this application.

[0020] It should be noted that the products shown in the above views are appropriately reduced / enlarged to adapt to the drawing size and view clarity, and do not limit the size of the products shown in the views. Detailed Embodiments

[0021] In order to make the purpose, technical solution and advantages of this application more clear, the following further details this application in conjunction with the drawings and specific embodiments.

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0023] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase does not necessarily refer to the same embodiment at various positions in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0024] An embodiment of the present application is an optical-mechanical structure, and its specific structure is as Figures 1-4 shown.

[0025] As Figure 1 shown, the optical-mechanical structure includes an optical-mechanical housing 10, a lens barrel assembly 20, a motor 30 and a focusing barrel 40. The lens barrel assembly 20 is provided at the front end of the optical-mechanical housing 10. In the embodiment, direction A is the front of the optical-mechanical housing 10, and its opposite direction is the rear of the optical-mechanical housing 10. In the middle of the lens barrel assembly 20 is a projection lens 201, and the projection lens 201 is used to project imaging light. The lens barrel assembly 20 is provided in the focusing barrel 40 and the lens barrel assembly 20 is coaxial with the focusing barrel 40, and the focusing barrel 40 is used to adjust the focal length of the lens barrel assembly 20. As Figure 1 shown, the optical-mechanical housing 10 includes an inclined back plate 11, the inclined back plate 11 is provided behind the lens barrel assembly 20, and the motor 30 is provided at an outer position of the inclined back plate 11. An arc-shaped rack 41 is provided on the outer wall of the focusing barrel 40, and a gear shaft 50 is provided between the arc-shaped rack 41 and the motor 30. The front gear 51 of the gear shaft 50 meshes with the arc-shaped rack 41, and the rear end of the gear shaft 50 is connected to the output shaft 31 of the motor 30 and rotates synchronously. The gear shaft 50 plays a role in extending the distance between the motor 30 and the focusing barrel 40. Therefore, the output shaft 31 of the motor 30 can directly drive the gear shaft 50 to rotate, and the gear shaft 50 drives the focusing barrel 40 to rotate through meshing with the arc-shaped rack 41 to achieve the focusing function.

[0026] In the optical-mechanical structure of the embodiment, the motor 30 is placed behind the inclined back plate 11 of the optical-mechanical housing 10, that is, the motor 30 is rear-mounted relative to the lens barrel assembly 20, so that the motor 30 does not occupy too much lateral space of the lens barrel assembly 20, and more space can be saved laterally in the lens barrel assembly 20 to facilitate the layout of other components, improving the flexibility of the overall structure design of the projector.

[0027] In some embodiments, asFigure 1 As shown, a reflective mirror surface 12 is provided on the inner side of the inclined back plate 11. The inner side surface of the reflective mirror surface 12 is the reflection surface of the imaging light. The imaging light reflected from the reflective mirror surface 12 is incident on the projection lens 201 inside the lens barrel assembly 20.

[0028] In some embodiments, as Figure 1 As shown, the rear end of the gear shaft 50 is connected to the output shaft 31 of the motor 30 through a coupling cylinder 52. In addition, a support cylinder 13 is provided at the top of the optical engine housing 10. The gear shaft 50 passes through the support cylinder 13 and the gear shaft 50 is coaxial with the support cylinder 13. The gear shaft 50 rotates around the central axis inside the support cylinder 13. The support cylinder 13 is used to support the middle part of the gear shaft 50 and maintain the horizontal height of the gear shaft 50.

[0029] In some embodiments, as Figure 2 As shown, a U-shaped positioning groove 111 is provided on the outer side wall of the inclined back plate 11. The lower part of the motor 30 is placed in the positioning groove 111. The positioning groove 111 is used to maintain the position of the motor 30 during the assembly of the motor 30. Ear plates 32 are respectively provided on both sides of the motor 30, and the two ear plates 32 are respectively fixedly connected to the horizontal internal threaded cylinders 112 on the outer side wall of the inclined back plate 11 through screws 321.

[0030] In some embodiments, as Figure 2 As shown, the optical engine housing 10 is provided with a cleaning window 14. A cleanable cleaning cover 15 is provided at the cleaning window 14. The position of the cleaning window 14 corresponds to the lens 16 and the display screen 17 inside the optical engine housing 10. After the optical engine structure has been used for a period of time, if dust accumulates on the surfaces of the lens 16 and the display screen 17, the cleaning cover 15 can be opened, and then a cleaning tool such as a cotton swab can be used to remove dust from the lens 16 and the display screen 17. In addition, a cleaning opening (not shown) should also be provided at the position of the projector housing corresponding to the cleaning window 14 to facilitate the cleaning tool to extend therein.

[0031] In some embodiments, as Figure 3 As shown, the lens barrel assembly 20 includes a fixed barrel 21 and a lens barrel 22. The fixed barrel 21 is relatively fixed to the optical engine housing 10, that is, during focusing, the fixed barrel 21 remains relatively fixed. The fixed barrel 21 penetrates into the focusing barrel 40 and the two are coaxial. The focusing barrel 40 can rotate relative to the fixed barrel 21. The lens barrel 22 penetrates into the fixed barrel 21 and the two are coaxial. The lens barrel 22 is slidably connected to the fixed barrel 21, and the lens barrel 22 can move axially linearly relative to the fixed barrel 21.

[0032] In some embodiments, as Figure 3As shown, a radial post 221 is provided above the outer wall of the lens barrel 22. The radial post 221 passes through the axial hole 211 of the fixed barrel 21 and penetrates into the inclined hole 41 in the wall of the focusing barrel 40. The axial hole 211 is parallel to the central axis of the fixed barrel 21. The axial hole 211 of the fixed barrel 21 is used to limit the lens barrel 22 to only move linearly along the axis relative to the fixed barrel 21 and prevent the lens barrel 22 from detaching from the fixed barrel 21. When the motor 30 drives the focusing barrel 40 to rotate around the central axis through the gear shaft 50, the inclined hole 41 can drive the lens barrel 22 to move through the radial post 221. Due to the limitation of the radial post 221 by the axial hole 211, the fixed barrel 21 remains relatively fixed, causing the radial post 221 to only move axially. That is, the lens barrel 22 finally moves linearly along the axis under the drive of the focusing barrel 40.

[0033] In some embodiments, in combination with Figure 3 and Figure 4 As shown, a limiting post 212 is provided on each side of the outer wall of the fixed barrel 21, and a circumferential limiting hole 42 is correspondingly provided on the wall of the focusing barrel 40. Each limiting post 212 penetrates into the corresponding circumferential limiting hole 42 so that the focusing barrel 40 only has the freedom of axial rotation relative to the fixed barrel 21. That is, when the focusing barrel 40 is driven to rotate by the motor 30, it will not move linearly along the axis.

[0034] Another embodiment is a projector, which includes the optical machine structure of the above embodiment.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0036] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0037] The above only further illustrates the technical content of this application with examples to make it easier for readers to understand, but it does not mean that the implementation mode of this application is limited to this. Any technical extension or re-creation based on this application is protected by this application. The protection scope of this application shall be subject to the claims.

Claims

1. An optomechanical structure, characterized in that: It includes an optical machine housing, a lens barrel assembly, a motor and a focusing barrel, wherein the lens barrel assembly is arranged at the front end of the optical machine housing, the lens barrel assembly is arranged in the focusing barrel and the lens barrel assembly and the focusing barrel are coaxial, and the focusing barrel is used to adjust the focal length of the lens barrel assembly; the optical machine housing includes an inclined back plate, the inclined back plate is arranged at the rear of the lens barrel assembly, the motor is arranged at the outer position of the inclined back plate, an arc-shaped rack is arranged on the outer wall of the focusing barrel, a gear shaft is arranged between the arc-shaped rack and the motor, the front end gear of the gear shaft is meshed with the arc-shaped rack, and the rear end of the gear shaft is connected to the output shaft of the motor and rotates synchronously.

2. The optomechanical structure according to claim 1, wherein: A reflective mirror is arranged on the inner side of the inclined back plate, and the light is reflected from the reflective mirror and injected into the lens barrel assembly.

3. The optomechanical structure according to claim 1, wherein: The rear end of the gear shaft is connected to the output shaft of the motor through a coupling cylinder.

4. The optomechanical structure according to claim 1, wherein: A support tube is provided at the top of the optical machine housing, and the gear shaft passes through the support tube and is coaxial with the support tube.

5. The optomechanical structure according to claim 1, wherein: The outer side wall of the inclined back plate is provided with a positioning groove, the lower part of the motor is placed in the positioning groove, and both sides of the motor are fixedly connected to the horizontal internal threaded cylinder on the outer side wall of the inclined back plate by screws.

6. The optomechanical structure according to claim 1, wherein: The lens barrel assembly includes a fixed barrel and a lens barrel, the fixed barrel is relatively fixed to the optical machine housing, the fixed barrel penetrates into the focusing barrel and the two are coaxial, the lens barrel penetrates into the fixed barrel and the two are coaxial, and the lens barrel is slidably connected to the fixed barrel.

7. The optomechanical structure according to claim 6, wherein: A radial column is provided on the outer wall of the lens barrel, and the radial column passes through the axial hole of the fixed barrel and penetrates into the inclined hole of the focusing barrel wall. The axial hole of the fixed barrel is used to limit the axial linear movement of the lens barrel relative to the fixed barrel. When the focusing barrel rotates around the central axis, the inclined hole is used to drive the axial linear movement of the lens barrel through the radial column.

8. The optomechanical structure according to claim 7, wherein: The outer wall of the fixed tube is provided with a limiting column, and the wall body of the focusing tube is provided with a circumferential limiting hole. The limiting column penetrates into the circumferential limiting hole so that the focusing tube only has the freedom of axial rotation relative to the fixed tube.

9. The optomechanical structure according to claim 1, wherein: The optical machine housing is provided with a cleaning window, and an openable and closable cleaning cover is provided at the cleaning window. The position of the cleaning window corresponds to the lens and the display screen inside the optical machine housing.

10. A projector, characterized in that It comprises the optomechanical structure as described in any one of claims 1-9.

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