CN115343899A

CN115343899A - Projection device

Info

Publication number: CN115343899A
Application number: CN202211037734.8A
Authority: CN
Inventors: 曹国勇; 王俊皓
Original assignee: Goertek Optical Technology Co Ltd
Current assignee: Goertek Optical Technology Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-15

Abstract

The application discloses projection arrangement includes: the optical machine is provided with a light outlet; the lens is provided with an incident end and a projection end, and the incident end can receive light rays emitted by the light outlet; the first end of the driving piece is connected with the optical machine, the second end of the driving piece is connected with the lens to drive the lens to move along a first direction, the first direction is parallel to the radial direction of the lens, and the driving piece can enable the position of a projection picture formed by light rays emitted from the light outlet after being emitted by the projection end to move. According to the projection device, the driving piece can drive the lens to move along the direction parallel to the radial direction of the lens, so that the position of the incident end of the lens is changed, light is made to move from the position of a projection picture formed by projecting from the projection end after passing through the lens, various projection requirements of a user can be met, and the use experience of the user is improved.

Description

Projection device

Technical Field

The present application relates to the field of projection technology, and more particularly, to a projection apparatus.

Background

In the prior art, a projection apparatus such as a projector usually projects an image through an optical engine. In the existing projection device, there is a problem that a deviation occurs between a projected picture and a projection carrier (a curtain, a wall surface, etc.) when the projector is used, and the projector usually adopts a mobile integral projection device to adjust, and the method has the following defects: on one hand, the projection picture is not easy to be quickly adjusted to an accurate position; on the other hand, the projector is difficult to be effectively fixed after the whole machine is adjusted in place, and the use experience of a user is easily influenced.

Disclosure of Invention

The application aims to provide a new technical scheme of a projection device, which can at least solve the problem that the position of a projection picture is difficult to adjust in the prior art.

The application provides a projection device, including: the optical machine is provided with a light outlet; the lens is provided with an incident end and a projection end, and the incident end can receive light rays emitted by the light outlet; the first end of the driving piece is connected with the optical machine, the second end of the driving piece is connected with the lens to drive the lens to move along a first direction, the first direction is parallel to the radial direction of the lens, and the driving piece can enable the position of a projection picture formed after light rays emitted from the light outlet are emitted through the projection end to move.

Optionally, the lens barrel includes: a lens body having the incident end and the projecting end; the installed part, the installed part is located the outer peripheral face of lens body, the installed part with the driving piece is connected.

Optionally, the projection device further includes a connecting portion, a part of the connecting portion is connected to the mounting member, and another part of the connecting portion is spaced apart from the mounting member and connected to the driving member.

Optionally, the connecting portion is connected to an outer periphery of the mounting member.

Optionally, the connecting portion is threadedly connected to the driver.

Optionally, the driver comprises: the screw rod is arranged on the optical machine and can rotate around the axis of the screw rod, the first end of the screw rod extends towards the position where the lens is located, and the second end of the screw rod extends out of the optical machine; the shifting part is arranged at the second end of the screw rod.

Optionally, the projection apparatus further includes a limiting member, the limiting member is disposed on the optical machine and located on one side of the shifting portion close to the screw, so as to limit the position of the driving member.

Optionally, the optical machine has an installation surface, light emitted from the light outlet penetrates through the installation surface, the projection device further comprises a guide piece, the guide piece is arranged on the installation surface and movably connected with the lens, and the guide piece is a long strip-shaped piece parallel to the first direction and used for limiting the moving direction of the lens.

Optionally, one side of the lens, which is close to the optical machine, is provided with a positioning portion and a matching portion, and the positioning portion is detachably connected with the matching portion so as to position the lens when the lens moves to a predetermined position along the first direction.

Optionally, one side of the optical machine close to the lens is provided with the positioning portion, one side of the lens close to the optical machine is provided with the matching portion, the matching portion is a positioning groove which is recessed inwards along the surface of the lens, and the positioning portion is a telescopic piece so as to be inserted into the positioning groove when the lens moves to the preset position.

According to this disclosed projection arrangement, set up the camera lens near the light-emitting outlet of ray apparatus, make the light that the ray apparatus sent jet out behind the camera lens entering, and can drive the camera lens through the driving piece and remove along the direction radial parallel with the camera lens, thereby change the position of the incident end that light jetted into the camera lens, and then make light from the position of projecting the end and jet out the projection picture that forms after the camera lens and take place to remove, for example, can make the projection picture move in vertical direction, in order to satisfy user's multiple projection demand, improve user's use and experience. The projection device has the advantages of simple structure, low cost and easiness in manufacturing.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a perspective view of a projection device according to an embodiment of the present application;

FIG. 2 is a schematic front view of a projection device according to an embodiment of the present application;

FIG. 3 is a schematic top view of a projection device according to an embodiment of the present application;

FIG. 4 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is an exploded view of a projection device according to one embodiment of the present application;

FIG. 7 is a schematic diagram illustrating a position of a projection picture projected by a projection apparatus according to an embodiment of the application;

FIG. 8 is a schematic diagram illustrating a position of a projection screen projected by a projection apparatus according to an embodiment of the application;

fig. 9 is a schematic diagram of a position of a projection picture projected by a projection apparatus according to an embodiment of the application.

Reference numerals

A projection device 100;

an optical machine 10; a light exit 11; a mounting surface 12;

a lens 20; a lens body 21; a projecting end 212; a mounting member 22; a guide hole 221;

a drive member 30; a screw 31; a toggle part 32;

a connecting portion 40; an end portion 41; the boss 42;

a stopper 50; a front stopper 51; a rear stopper portion 52;

a guide member 60; a positioning portion 70; a fitting portion 80; a focusing mechanism 90.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The projection apparatus 100 according to the embodiment of the present application is described in detail below with reference to the drawings.

As shown in fig. 1 to 9, a projection apparatus 100 according to an embodiment of the present application includes: an optical engine 10, a lens 20 and a driving member 30. The projection device 100 may be a projector, among others.

Specifically, the optical engine 10 has a light outlet 11, the lens 20 has an incident end and a projecting end 212, the incident end can receive light emitted from the light outlet 11, a first end of the driving member 30 is connected to the optical engine 10, a second end of the driving member 30 is connected to the lens 20 for driving the lens 20 to move along a first direction, the first direction is parallel to a radial direction of the lens 20, and the driving member 30 can move a position of a projection image formed after the light emitted from the light outlet 11 is emitted through the projecting end 212.

In other words, the projection apparatus 100 according to the embodiment of the present application is mainly composed of the optical engine 10, the lens 20 and the driving element 30. One end of the optical engine 10 may be provided with a light outlet 11, and light generated by the optical engine 10 to form a projection image may be emitted from the light outlet 11. The lens 20 may have an incident end and a projecting end 212, and the incident end of the lens 20 may be opposite to the light outlet 11 of the optical engine 10, so that the light emitted from the light outlet 11 may enter the lens 20 from the incident end, and then may be emitted from the projecting end 212 to form a projection picture, which is projected on a projection picture carrier such as a curtain, a wall surface, and the like.

Specifically, the lens 20 may have a cylindrical shape, and an axis of the lens 20 may be parallel to the light emitted from the light outlet 11 of the optical engine 10. One end of the lens 20 along the axis thereof may be an incident end, and the other end thereof may be a projecting end 212, the lens 20 may include a lens barrel and a plurality of lenses disposed in the lens barrel, and the light incident from the incident end may sequentially pass through the plurality of lenses and then be emitted from the projecting end 212. Each lens can perform different functions on light, such as amplification, chromatic aberration adjustment, focus range control, compensation and the like.

In addition, the driving element 30 has a first end and a second end, the first end of the driving element 30 can be connected to the optical engine 10, it should be noted that the connection between the first end of the driving element 30 and the optical engine 10 can be a direct connection or an indirect connection, for example, the projection apparatus 100 can have a housing, and the optical engine 10 and the driving element 30 are indirectly connected through the housing.

The second end of the actuator 30 may be connected to the lens 20, and the lens 20 may be moved in the first direction by the actuation of the actuator 30. The first direction may be parallel to a radial direction of the lens 20, that is, the first direction may be a direction in any radial direction of the lens 20, for example, when the projection apparatus 100 is horizontally placed, an axis of the lens 20 may extend in a horizontal direction, and the light emitted from the light outlet 11 of the optical engine 10 may also extend in a horizontal direction, and the first direction may be a horizontal direction perpendicular to an axial direction of the lens 20, or a vertical direction, that is, the lens 20 may be driven to move in the horizontal direction by the driving member 30, or the lens 20 may be driven to move in the vertical direction.

That is, the lens 20 is driven by the driving unit 30 to move along the first direction, so that the position of the projection screen formed by the light emitted from the light outlet 11 through the projection end 212 can be moved. Specifically, the driving element 30 drives the lens 20 to move along the first direction, so as to change the relative position between the incident end of the lens 20 and the light outlet 11 of the optical engine 10.

For example, fig. 7 to 9 show different positions of the projected picture on the carrier when the lens 20 is moved to different positions. Specifically, the projection screen of fig. 7 is located lowest, the projection screen of fig. 8 is located second lowest, and the projection screen of fig. 9 is located highest. Fig. 7 may be a position of a picture projected when the incident end of the lens 20 is directly opposite to the light outlet 11, where the projected picture projected by the projecting end 212 is not shifted, fig. 8 may be a position of a picture projected after the lens 20 moves a short distance in the first direction with respect to the position directly opposite to the light outlet 11, fig. 9 may be a position of a picture projected after the lens 20 moves a long distance in the first direction with respect to the position directly opposite to the light outlet 11, and it can be clearly seen that the shift amount of the projected picture of fig. 9 is significantly larger than that of the projected picture of fig. 8.

When the user uses the projection apparatus 100 of this embodiment, the lens 20 can be driven by the driving element 30 to move according to various requirements, on one hand, the lens 20 can be driven by the driving element 30 to move according to different positions of the carrier, for example, different positions of the curtain and different viewing angles of the user, and different requirements for the projection position of the projection picture are met. When the position of the curtain is low, the driving member 30 can drive the lens 20 to move along the vertical direction, so that the projection picture can be deviated downwards and projected in the range of the curtain; when the position of the curtain is high, the driving member 30 can also drive the lens 20 to move along the vertical direction, so that the projection image is shifted upwards and projected within the range of the curtain.

Alternatively, the number of the driving members 30 may be multiple, each driving member 30 may drive the lens 20 to move along a specific direction, and the directions in which the different driving members 30 drive the lens 20 to move may be different, and in this case, the position of the lens 20 in a plane perpendicular to the axis of the lens 20 may be adjusted by driving the different driving members 30, for example, the position of the lens 20 in a vertical plane may be adjusted, so as to change the position of the incident end of the lens 20, into which the light emitted by the optical engine 10 is incident, and thus change the projection position of the projection picture on a carrier such as a curtain.

Therefore, according to the projection apparatus 100 of the embodiment of the application, the lens 20 is disposed near the light outlet 11 of the optical engine 10, so that the light emitted by the optical engine 10 enters the lens 20 and is emitted, and the driving element 30 can drive the lens 20 to move along the direction parallel to the radial direction of the lens 20, so as to change the position of the incident end of the light entering the lens 20, and further move the position of the projection image formed by emitting the light from the projection end 212 after passing through the lens 20, for example, the projection image can move in the vertical direction, so as to meet various projection requirements of a user, and improve the user experience. The projection apparatus 100 of the embodiment has the advantages of simple structure, low cost, easy manufacture, and the like.

According to one embodiment of the present application, the lens 20 includes a lens body 21 and a mounting member 22, wherein the lens body 21 has an incident end and a projecting end 212, the mounting member 22 is provided on an outer circumferential surface of the lens body 21, and the mounting member 22 is connected to the driving member 30.

Specifically, the lens 20 is mainly composed of a lens body 21 and a mounting member 22, wherein the lens body 21 may include a lens barrel and a plurality of lenses disposed in the lens 20, an end of the lens body 21 facing the optical engine 10 may be an incident end, and an end of the lens body 21 away from the optical engine 10 may be a projection end 212.

The mount 22 may be provided around the outer circumferential surface of the lens body 21, that is, the mount 22 may be attached to the outer circumferential surface of the lens barrel and extend outward from the outer circumferential surface of the lens barrel in the radial direction of the lens barrel. Alternatively, the mounting member 22 may be a mounting plate, and the outer contour of the mounting plate may be rectangular to match the shape of the contour of the light outlet 11 of the light engine 10, so as to save the mounting space.

In addition, the mounting member 22 is connected to the driving member 30, and specifically, the second end of the driving member 30 may be connected to the mounting member 22, and the driving member 30 is moved in the first direction by driving the mounting member 22, so that the lens body 21 connected to the mounting member 22 may be synchronously moved in the first direction, thereby changing the position of the projection screen emitted from the projection end 212 of the lens 20.

It should be noted that, since the lens 20 is a precision component, in the embodiment, the driving element 30 indirectly drives the lens body 21 to move by being connected to the mounting element 22, which not only facilitates the connection between the driving element 30 and the lens 20, but also avoids the damage to the lens body 21 in the process of connecting the driving element 30.

According to some embodiments of the present application, the projection device 100 may further include a connecting portion 40, a portion of the connecting portion 40 is connected to the mounting member 22, and another portion of the connecting portion 40 is spaced apart from the mounting member 22 and connected to the driving member 30.

That is, the driving member 30 and the mounting member 22 are connected by the connecting portion 40, and a part of the connecting portion 40 may be connected to the mounting member 22, and it should be noted that the part of the connecting portion 40 connected to the mounting member 22 may be integrally formed or may be detachably connected, for example, a part of the connecting portion 40 may be connected to the mounting member 22 by a screw, and another part of the connecting portion 40 may be connected to the driving member 30 and spaced apart from the mounting member 22, that is, a gap may be provided between the another part of the connecting portion 40 and the mounting member 22.

For example, the connecting portion 40 may include a protruding portion 42 and two end portions 41, the protruding portion 42 may be disposed between the two end portions 41, the two end portions 41 may be respectively connected to the mounting member 22 through bolts, and when the mounting member 22 is a mounting plate, the two end portions 41 may be attached to the mounting plate and fixed through bolts. The boss 42 may be arcuate with a gap between the boss 42 and the mounting member 22, and the second end of the driver 30 may be coupled to the boss 42.

Therefore, when the driver 30 drives the lens 20 to move in the first direction, the driver 30 may directly drive the connection part 40 such that the mount 22 connected with the connection part 40 and the lens body 21 connected with the mount 22 move together in the first direction.

In the embodiment, by providing the connecting portion 40 on the mounting member 22 to connect with the driving member 30, the connection between the driving members 30 and the mounting member 22 can be avoided, the mounting and dismounting between the driving member 30 and the lens 20 can be facilitated, and by providing the driving portion, the size of the mounting member 22 can be reduced, which is beneficial to the light weight and miniaturization of the projection apparatus 100.

According to one embodiment of the present application, the connection portion 40 is connected to an outer periphery of the mounting member 22. Specifically, the mounting member 22 may have a plate shape, and a portion of the connection portion 40 may be connected to an outer peripheral edge of the mounting member 22.

For example, the connecting portion 40 may include a protruding portion 42 and two end portions 41, the protruding portion 42 may be disposed between the two end portions 41, the two end portions 41 may be respectively connected to one side end portion 41 of the mounting member 22 by bolts, and when the mounting member 22 is a mounting plate, the two end portions 41 may be attached to one side end surface of the mounting plate and fixed by bolts. And the boss 42 has a gap with the one-side end 41 of the mounting member 22.

Thus, in the present embodiment, by connecting the connecting portion 40 with the outer periphery of the mounting member 22, the connecting portion 40 can be located in the direction radially outward of the lens 20 from the mounting member 22, that is, the connecting portion 40 can be located on the side of the mounting member 22 away from the lens body 21 in the first direction, which is beneficial to reducing the size of the connecting portion 40, facilitating the installation and driving of the driving member 30, and reducing the complexity of the driving member 30.

According to one embodiment of the present application, the connection portion 40 is threadedly connected with the driver 30. In particular, a threaded hole may be provided in the connecting portion 40, and the threaded hole may be provided in a portion of the connecting portion 40 spaced apart from the mounting member 22, and a stud structure cooperating with the threaded hole may be provided at the second end of the driver 30, and by rotating the stud structure of the driver 30, the connecting portion 40 may be moved in the axial direction of the stud structure.

In addition, a threaded hole may be provided at the second end of the driving element 30, and a stud structure that fits the threaded hole may be provided on the connecting portion 40, and the stud structure may be provided on a portion of the connecting portion 40 that is spaced apart from the mounting element 22, and by rotating the stud structure of the driving element 30, the connecting portion 40 may also be moved in the axial direction of the stud structure.

That is, the connecting portion 40 and the driving member 30 can be connected by a screw thread, and the specific positions of the threaded hole and the stud structure are not limited herein, and all the purposes of the driving member 30 for driving the connecting portion 40 can be satisfied. In addition, the driving member 30 and the connecting portion 40 are connected by a screw connection, which has the advantages of simple structure, easy manufacture and reduced manufacturing cost of the driving device.

In addition, no matter the connection part 40 or the stud structure is arranged on the part distributed at intervals between the connection part 22 and the mounting part 22, the mounting part 22 can limit the driving part 30 in the process that the driving part 30 drives the lens 20, specifically, when the second end of the driving part 30 and the connection part 40 are relatively displaced to the state that the second end of the driving part 30 is abutted to the outer periphery of the mounting part 22, the limit position that the driving part 30 drives the lens 20 to move can be reached, the lens 20 is difficult to continue to move along the original movement direction, and the problem that the light emitted from the optical machine 10 cannot be emitted into the lens 20 from the incident end of the lens 20 is avoided.

According to an embodiment of the present application, the driving member 30 includes a screw 31 and a toggle portion 32, wherein the screw 31 is disposed on the optical engine 10 and is rotatable around its axis, a first end of the screw 31 extends toward the position of the lens 20, a second end of the screw 31 extends out of the optical engine 10, and the toggle portion 32 is disposed at a second end of the screw 31.

In other words, the driver 30 is mainly composed of the screw 31 and the dial 32. Wherein, the screw rod 31 can be in a long cylindrical shape, and the screw rod 31 can rotate around the axis thereof. The screw 31 is disposed on the optical machine 10 and has a first end and a second end, and at least a portion of the outer circumference of the screw 31 is provided with a thread.

Specifically, the first end of the screw 31 may be the second end of the driver 30, the first end of the screw 31 may extend toward the position of the lens 20 and may be connected to the connecting portion 40, the first end of the screw 31 may be provided with an external thread, and a portion of the connecting portion 40 spaced apart from the mounting member 22 may have a threaded hole for engaging with the external thread of the screw 31.

The second end of the screw 31 may extend out of the optical engine 10, specifically, the optical engine 10 may have a mounting portion, and the screw 31 may be disposed on the mounting portion of the optical engine 10 and may extend out of the mounting portion of the optical engine 10. The outer circumference of the portion of the screw 31 protruding out of the optical engine 10 may be a smooth outer circumference.

The toggle part 32 is disposed at a second end of the screw 31, that is, the toggle part 32 is located at a side of the screw 31 away from the lens 20. Optionally, the dial part 32 may be disc-shaped, and the diameter of the dial part 32 may be greater than the diameter of the screw rod 31 so as to facilitate the dial operation, and in addition, the outer peripheral surface of the dial part 32 may be provided with grains for improving the friction force so as to facilitate the operation.

That is, the screw 31 can be rotated around its axis by toggling the toggle part 32 to change the relative position between the screw 31 and the connecting part 40, and thus the relative position between the screw 31 and the lens 20. Since the screw 31 is connected to the optical engine 10, the relative position between the optical engine 10 and the lens 20 can be changed, so as to change the position of the projection picture projected by the lens 20.

In addition, the connecting part 40 has a part which is separated from the mounting part 22, so that the first end of the screw 31 can be limited by the end surface of the connecting part facing to one side of the connecting part 40, thereby limiting the limit relative position between the lens 20 and the optical engine 10 and avoiding the problem that the light emitted from the optical engine 10 is difficult to enter the lens 20 from the incident end of the lens 20.

In this embodiment, the screw 31 is screwed to the connecting portion 40, which is simple in structure and beneficial to fine-tuning the distance between the lens 20 and the optical machine 10, so as to slowly adjust the position of the projection image and facilitate fine-tuning control.

Alternatively, the rotation of the screw 31 can be operated by a user manually moving the toggle part 32, or can be driven by a mechanical structure, for example, the driving part 30 can include a driving motor, which can be connected to the screw 31 through a transmission mechanism, and electrically drive the screw 31 to rotate, so as to adjust the position of the lens 20 and the position of the projection image projected from the lens 20.

Alternatively, the driving member 30 may include a lead screw and a driving motor, and the lens 20 may be driven to move in the first direction by the lead screw.

According to some other embodiments of the present application, the projection apparatus 100 further includes a limiting element 50, the limiting element 50 is disposed on the optical machine 10 and is located at a side of the toggle portion 32 close to the screw 31 for limiting the position of the driving element 30.

That is, the position of the driving member 30 can be limited by the limiting member 50 disposed on the optical engine 10. Specifically, the limiting member 50 may be integrally formed with the optical engine 10, or may be detachably connected to the optical engine 10.

For example, the limiting member 50 may include two portions, namely a front limiting portion 51 and a rear limiting portion 52, the front limiting portion 51 may be located at a front end of the rear limiting portion 52 in an emitting direction of light emitted by the optical engine 10, two ends of the rear limiting portion 52 may be detachably connected to a side surface of the optical engine 10 facing the lens 20 by bolts, and two ends of the front limiting portion 51 may be detachably connected to the rear limiting portion 52 by bolts.

Also, the limiting member 50 may have a limiting hole through which the bolt passes, and a step may be provided in the limiting hole, specifically, a diameter of a first portion of the limiting hole may be smaller than a diameter of a second portion of the limiting hole, the first portion of the limiting hole may be a portion of the limiting hole relatively close to the lens 20, and the second portion of the limiting hole may be a portion of the limiting hole relatively far from the lens 20. The portion of the bolt penetrating through the limiting hole may be provided with a boss protruding outward from the outer circumferential surface of the bolt in the radial direction of the bolt, and the diameter of the boss portion may be smaller than the diameter of the second portion of the limiting hole but larger than the diameter of the first portion of the limiting hole, that is, the boss on the bolt may be limited by a step in the limiting hole, so as to limit the relative position between the bolt and the optical engine 10, so that only the lens 20 moves in the first direction during the rotation of the bolt.

For example, as shown in fig. 4, due to the limiting function of the limiting element 50, when the toggle portion 32 is toggled to rotate the bolt, if the position of the optical machine 10 is fixed, the bolt can drive the lens 20 to move up and down along the vertical direction, so as to change the position of the projection picture in the vertical direction.

According to an embodiment of the present application, the optical machine 10 has a mounting surface 12, the light emitted from the light outlet 11 penetrates the mounting surface 12, the projection apparatus 100 further includes a guide 60, the guide 60 is disposed on the mounting surface 12 and movably connected to the lens 20, and the guide 60 is an elongated member parallel to the first direction for defining a moving direction of the lens 20.

Specifically, the mounting surface 12 may be a side surface of the optical engine 10 facing an incident end of the lens 20, and the side surface may be penetrated by the light emitted from the light outlet 11, and optionally, the mounting surface 12 may be perpendicular to the light emitted from the light outlet 11.

Also, the guide 60 may be mounted on the mounting surface 12, and the guide 60 may be an elongated member parallel to the first direction, for example, the guide 60 may be a guide rod, both ends of the guide rod may be respectively connected to the mounting surface 12, and the mounting surface 12 may be provided with a mounting hole portion protruding from the mounting surface 12 for connecting the guide 60.

In addition, the lens 20 may be movably coupled to the guide 60, that is, the guide 60 may define a moving direction of the lens 20, and specifically, the guide 60 may be coupled to the mounting part 22 of the lens 20, the mounting part 22 may have a guide hole 221 for the guide 60 to pass through, and an axis of the guide hole 221 may be parallel to the first direction, and when the lens 20 is driven to move by the driving member 30, the lens 20 may slide along the guide 60 by the mounting part 22 coupled to the guide 60, so that the movement of the lens 20 is more smooth.

Alternatively, the number of the guide members 60 may be one or more, for example, the number of the guide members 60 may be two, the number of the guide holes 221 on the corresponding mounting member 22 may be two, two guide holes 221 may be located on both sides of the lens body 21, and two guide members 60 respectively pass through the corresponding guide holes 221. The provision of two or more guide members 60 is advantageous in improving the smoothness and stability of the movement process of the lens 20.

According to other embodiments of the present application, the lens 20 and the optical engine 10 are respectively provided with a positioning portion 70 and a matching portion 80 at a side close to each other, and the positioning portion 70 is detachably connected with the matching portion 80 to position the lens 20 when the lens 20 moves to a predetermined position along the first direction.

That is, the positioning portion 70 may be disposed on the lens 20, and the matching portion 80 may be disposed on the optical engine 10; the lens 20 may also be provided with a matching part 80, and the optical engine 10 may be provided with a positioning part 70; the positioning portion 70 and the matching portion 80 may be disposed on the lens 20, and the positioning portion 70 and the matching portion 80 may also be disposed on the optical engine 10, so that the lens 20 may be positioned when the lens 20 moves to a predetermined position by the surrounding of the positioning portion 70 and the matching portion 80.

Specifically, the positioning portion 70 and/or the fitting portion 80 on the lens 20 may be disposed on the mounting member 22 of the lens 20 on a side of the mounting member 22 facing the light outlet 11 of the optical engine 10, and the positioning portion 70 and/or the fitting portion 80 on the optical engine 10 may be disposed on a side of the optical engine 10 facing the incident end of the lens 20, that is, the positioning portion 70 and/or the fitting portion 80 on the optical engine 10 may be disposed on the mounting surface 12 of the optical engine 10.

In addition, the positioning portion 70 and the fitting portion 80 are detachably connected, and specifically, when the lens 20 moves to a predetermined position in the first direction, the positioning portion 70 may be fitted with the fitting portion 80 to position the lens 20, and when the lens 20 moves to a position other than the predetermined position in the first direction, the positioning portion 70 may be misaligned with the fitting portion 80.

It should be noted that the position of the projection picture when the incident end of the lens 20 is aligned with the light exit 11 of the optical engine 10 may be a 0 ° offset position, the predetermined position may be a position having a predetermined angle with the projection picture relative to the 0 ° offset position, and the predetermined angle may be 15 °, 30 °, 45 °, and the like.

Alternatively, the number of the positioning portions 70 and the number of the matching portions 80 may be multiple, the number of the positioning portions 70 may be different from the number of the matching portions 80, the projection apparatus 100 may have multiple predetermined positions, different predetermined positions may be positioned by matching different positioning portions 70 and different matching portions 80, and different positioning portions 70 may be positioned with the same matching portion 80, which is not limited herein.

In the present embodiment, the lens 20 moved to the predetermined position can be positioned by the cooperation of the positioning portion 70 and the matching portion 80, which does not affect the driving of the lens 20 to stop moving at any position, and is beneficial for the user to stay at certain specific positions during the process of adjusting the position of the lens 20 by the driving member 30, so as to improve the adjustment precision and the adjustment efficiency. Moreover, the user can timely obtain feedback of the position of the lens 20, and the lens 20 can be shifted due to external interference after moving to a predetermined position, for example, the lens 20 is shifted due to shaking of the projection apparatus 100.

According to an embodiment of the present application, a positioning portion 70 is disposed on a side of the optical engine 10 close to the lens 20, a matching portion 80 is disposed on a side of the lens 20 close to the optical engine 10, the matching portion 80 is a positioning groove recessed inwards along a surface of the lens 20, and the positioning portion 70 is a telescopic member to be inserted into the positioning groove when the lens 20 moves to a predetermined position.

Specifically, the positioning portion 70 may be disposed on the mounting surface 12 of the optical engine 10, and the fitting portion 80 may be disposed on a side surface of the mounting member 22 of the lens 20 facing the light outlet 11 of the optical engine 10. Here, the fitting portion 80 may be a positioning groove provided on the surface of the mounting member 22 and recessed inward, the positioning groove may extend in a second direction, the second direction may be parallel to a radial direction of the lens 20, and the second direction may be perpendicular to the first direction, for example, if the first direction is a vertical direction as shown in fig. 4 and 5, the second direction may be a horizontal direction as shown in fig. 4 and 5.

The positioning portion 70 may be a telescopic member, for example, the positioning portion 70 may be a ball plunger, the ball plunger may include a plunger rod, an elastic member, and a positioning bead, the plunger rod may be disposed on the mounting surface 12 and extend in a direction parallel to the axis of the lens 20 toward the lens 20, the elastic member may be disposed in the plunger rod, and the elastic member may be in a compressed state, and the positioning bead may abut against a side surface of the mounting member 22 facing the light outlet 11 under an elastic force of the elastic member.

When the driving member 30 drives the lens 20 to move along the first direction, the relative position between the positioning bead and the mounting member 22 can be changed, that is, the positioning bead can relatively displace on a side surface of the mounting member 22 facing the light outlet 11, when the lens 20 moves to a predetermined position, the positioning bead can be opposite to the positioning groove, and a part of the positioning bead can enter the positioning groove under the elastic force of the elastic member, so as to position the lens 20,

alternatively, the positioning portion 70 may be an elastic member or other telescopic member, and as long as it can be extended and contracted in a direction parallel to the axis of the lens 20, the positioning portion can cooperate with the positioning groove to position the lens 20.

Optionally, the number of extensible member may be a plurality of, and the quantity of constant head tank also may be a plurality of, and the quantity of constant head tank may be different with the quantity of extensible member, for example, the quantity of extensible member may be four, and four extensible members may be central symmetry distribution on installation face 12, and the quantity of constant head tank also may be four, and every constant head tank may all extend along the second direction, as shown in fig. 5, from last first constant head tank, second constant head tank, third constant head tank and the fourth constant head tank of down being equipped with in proper order on the installed part 22.

In addition, the predetermined position may be plural, for example, there may be provided a first predetermined position and a second predetermined position, the first predetermined position may correspond to the first positioning groove and the third positioning groove, and the second predetermined position may correspond to the second positioning groove and the fourth positioning groove. When the lens 20 moves to the first predetermined position, the two upper telescopic parts can be inserted into the first positioning groove, and the two lower telescopic parts can be shot into the third positioning groove; when the lens 20 moves to the second predetermined position, the upper two telescopic members can be inserted into the second positioning groove, and the lower two telescopic members can be inserted into the fourth positioning groove.

In this embodiment, the positioning portion 70 is provided as a telescopic member, and is matched with the positioning groove serving as the matching portion 80, so that the positioning device is simple in structure, easy to manufacture, and good in positioning effect, and can effectively prevent the lens 20 from deviating after the lens 20 is positioned.

Optionally, the projection apparatus 100 may further include a focusing mechanism 90, and the focusing mechanism 90 may be disposed on the mounting member 22 on a side of the mounting member 22 away from the light outlet 11 of the light engine 10. The focus mechanism 90 may include a focus motor and a focus transmission structure, and the focus motor may be connected to the lens body 21 through the focus transmission structure for adjusting the focus of the lens body 21.

In summary, according to the projection apparatus 100 of the embodiment, the driving element 30 can drive the lens 20 to move along the direction parallel to the radial direction of the lens 20, so as to change the position of the incident end of the light entering the lens 20, so that the position of the projection image formed by the light emitted from the projection end 212 after passing through the lens 20 moves, thereby meeting the projection requirement of the user and improving the use experience of the user.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. A projection device, comprising:

the optical machine is provided with a light outlet;

the lens is provided with an incident end and a projection end, and the incident end can receive light rays emitted by the light outlet;

the first end of the driving piece is connected with the optical machine, the second end of the driving piece is connected with the lens to drive the lens to move along a first direction, the first direction is parallel to the radial direction of the lens, and the driving piece can enable the position of a projection picture formed after light rays emitted from the light outlet are emitted through the projection end to move.

2. The projection device of claim 1, wherein the lens comprises:

a lens body having the incident end and the projecting end;

the installed part, the installed part is located the outer peripheral face of lens body, the installed part with the driving piece is connected.

3. The projection device of claim 2, further comprising:

a connecting part, a part of the connecting part is connected with the mounting part, and another part of the connecting part is distributed at a distance from the mounting part and is connected with the driving part.

4. A projection device according to claim 3, wherein the connecting portion is connected to an outer periphery of the mount.

5. The projection device of claim 3 or 4, wherein the connection portion is threadedly connected to the drive member.

6. The projection device of claim 5, wherein the drive member comprises:

the screw rod is arranged on the optical machine and can rotate around the axis of the screw rod, the first end of the screw rod extends towards the position where the lens is located, and the second end of the screw rod extends out of the optical machine;

the shifting part is arranged at the second end of the screw rod.

7. The projection device of claim 6, further comprising:

the limiting part is arranged on the optical machine and is positioned on one side, close to the screw rod, of the shifting part so as to limit the position of the driving part.

8. The projection apparatus according to claim 1, wherein the optical engine has a mounting surface, and the light emitted from the light outlet penetrates through the mounting surface, and the projection apparatus further comprises:

the guide, the guide is located the installation face and with camera lens movably connects, the guide be with the rectangular shape piece that the first direction is parallel is in order to be used for injecing the moving direction of camera lens.

9. The projection apparatus according to claim 1, wherein a positioning portion and a fitting portion are respectively disposed on a side of the lens close to the optical engine, and the positioning portion is detachably connected to the fitting portion to position the lens when the lens moves to a predetermined position along the first direction.

10. The projection apparatus according to claim 9, wherein the positioning portion is disposed on a side of the optical engine close to the lens, the engaging portion is disposed on a side of the lens close to the optical engine, the engaging portion is a positioning groove recessed inward along a surface of the lens, and the positioning portion is a telescopic member to be inserted into the positioning groove when the lens moves to the predetermined position.