CN115327844B - Lens adjusting mechanism and projection equipment - Google Patents

Abstract

The invention relates to a lens adjusting mechanism and a projection device. The lens adjusting mechanism comprises a base, a first adjusting component and a second adjusting component. The first adjusting assembly comprises a first movable support and a first driving piece, wherein the first movable support is provided with a first avoiding space, and the first driving piece is positioned in the first avoiding space and is in driving connection with the first movable support. The second adjusting component comprises a second driving piece and a second movable bracket for installing the lens, and the second driving piece is in driving connection with the second movable bracket. The lens adjusting mechanism can adjust the position of the lens in the first direction and the second direction, so that the projection equipment with the lens adjusting mechanism can adapt to the requirements of different scenes. Because the first driving piece is fixed in the base, the position that first movable support corresponds first driving piece is equipped with first space of dodging, and first driving piece is located first space of dodging, avoids appearing the motion interference along the in-process that the first direction removed, is favorable to reducing lens adjustment mechanism's volume simultaneously.

Description

Lens adjusting mechanism and projection equipment

Technical Field

The present invention relates to the field of projection devices, and in particular, to a lens adjusting mechanism and a projection device.

Background

In a conventional projection device, a lens is fixed, and the lens is located at a center position of a projection screen, so that a user can be blocked from viewing a projection image by a placement position of the projection device. In order to solve this problem, a lens adjusting mechanism is usually disposed in the projection device, and the lens adjusting mechanism drives the lens to move, so that the center position of the projection screen has a certain offset relative to the lens. However, the common lens adjustment mechanism is bulky.

Disclosure of Invention

Accordingly, it is necessary to provide a lens adjusting mechanism and a projection apparatus, which are advantageous for downsizing.

A lens adjustment mechanism, comprising:

a base;

the first adjusting assembly comprises a first movable bracket and a first driving piece, the first movable bracket is movably arranged on the base, and a first avoidance space is formed in the first movable bracket; the first driving piece is fixed on the base, is positioned in the first avoiding space, is in driving connection with the first movable bracket, and is used for driving the first movable bracket to move along a first direction relative to the base; and

The second adjusting assembly comprises a second driving piece and a second movable bracket for installing a lens, the second movable bracket is positioned on one side of the first movable bracket, which is away from the base, and is movably installed on the first movable bracket, the second driving piece is fixed on the first movable bracket and is in driving connection with the second movable bracket, and the second driving piece is used for driving the second movable bracket to move along a second direction relative to the first movable bracket; wherein the first direction and the second direction are perpendicular.

In one embodiment, the base comprises a first flange and a first mounting part, the first mounting part is connected to one side of the first flange, and the first driving piece is mounted on the first mounting part; the first movable support comprises a second flange and a second installation portion, the second flange and the first flange are oppositely arranged, the second flange is close to one side of the first installation portion, the second installation portion is connected to the first side portion, the second installation portion and the second side portion enclose to form a first avoidance space, the first installation portion and the first avoidance space are oppositely arranged, and the second driving piece is installed on the second installation portion.

In one embodiment, the first flange is close to one side of the second installation portion and comprises a third side portion and a fourth side portion which are sequentially arranged, the first installation portion is connected to the third side portion, the first installation portion and the fourth side portion enclose to form a second avoidance space, the lens adjusting mechanism further comprises a first detection assembly and a first detection matching assembly, the first detection assembly is installed on the first installation portion, the detection portion of the first detection assembly is located in the second avoidance space, the first detection matching assembly is installed on the second installation portion, and the first detection assembly is matched with the first detection matching assembly to detect the position of the first movable support in the first direction.

In one embodiment, the first moving bracket further includes a first connection portion connected to the second side portion and extending from the second flange in a direction away from the base, and the first driving member is in driving connection with the first connection portion.

In one embodiment, the second moving bracket further includes a third flange, a second connecting portion and a third mounting portion, the third flange is disposed opposite to the second flange, the second connecting portion is connected to one side of the third flange close to the second mounting portion and extends from the third flange in a direction away from the first moving bracket, the third mounting portion includes a first mounting main body and a second mounting main body, the first mounting main body is connected to the second connecting portion and extends from the second connecting portion in a direction away from the third flange, the second mounting main body is connected to the first mounting main body and extends from the first mounting main body in a direction close to the first moving bracket, a space adapted to the first connecting portion is formed between one side of the second mounting main body close to the third flange and the second connecting portion, and the second driving member is located in the second mounting main body, the first mounting main body and the second mounting main body.

In one embodiment, the first moving bracket further comprises a fourth mounting part connected to one side of the second mounting part away from the second flange and extending from the second mounting part in a direction away from the base; the second adjusting component further comprises a second detecting component and a second detecting matching component, the second detecting matching component is mounted on one side, far away from the third flange, of the first mounting main body, the second detecting component is mounted on the fourth mounting portion, and the second detecting component is matched with the second detecting matching component and used for detecting the position of the second movable support in the second direction.

In one embodiment, the lens adjusting mechanism further comprises a lens, and the lens is connected to the third flange; the lens comprises a lens body and a focusing ring, and the focusing ring is sleeved on the outer peripheral surface of the lens body; the lens adjusting mechanism further comprises a focusing driving assembly, the focusing driving assembly is mounted on the third mounting portion and connected with the focusing ring, and the focusing driving assembly is used for driving the focusing ring to rotate so as to drive the lens body to rotate, so that the lens body moves along the axial direction of the lens body.

In one embodiment, the third mounting portion further includes a third mounting body connected to a side of the first mounting body away from the second mounting body and extending from the first mounting body in a direction away from the first moving bracket, and the focus driving assembly is mounted to the third mounting body.

In one embodiment, the lens adjusting mechanism further comprises a third detecting component and a fixing support, the fixing support is mounted on the third mounting portion, the third detecting component is mounted on one side, far away from the focusing driving component, of the lens body through the fixing support, a blocking portion is arranged on the outer circumferential surface of a part of the focusing ring, the blocking portion extends along the circumferential direction of the focusing ring, the blocking portion can be opposite to the third detecting component when the focusing ring rotates, and the third detecting component is used for detecting the rotating position of the focusing ring.

A projection device includes the lens adjusting mechanism.

When the position of the lens in the first direction is required to be adjusted, the first driving piece is started, and drives the first movable support to move along the first direction relative to the base, so that the second adjusting component and the lens on the first movable support are driven to move along the first direction until the lens is adjusted to a proper position. When the position of the lens in the second direction is required to be adjusted, the second driving piece is started, and drives the second movable support to move along the second direction relative to the first movable support, so that the lens on the second movable support is driven to move along the second direction until the lens is adjusted to a proper position. Therefore, the lens adjusting mechanism can adjust the positions of the lens in the first direction and the second direction, so that the projection equipment with the lens adjusting mechanism can adapt to the requirements of different scenes. Because the first driving piece is fixed in the base, the position that first movable support corresponds first driving piece is equipped with first space of dodging, and first driving piece is located first space of dodging, can avoid like this that first movable support appears the motion interference along the in-process that first direction removed with first driving piece, simultaneously through rationally setting up first movable support and first driving piece for this lens adjustment mechanism compact structure is favorable to reducing lens adjustment mechanism's volume.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lens adjusting mechanism according to an embodiment of the invention;

FIG. 2 is a second schematic structural diagram of the lens adjustment mechanism shown in FIG. 1;

FIG. 3 is a schematic diagram of a third embodiment of the lens adjustment mechanism shown in FIG. 1;

fig. 4 is an exploded view of the lens adjustment mechanism shown in fig. 1.

Reference numerals illustrate:

10. a base; 11. a first flange; 12. a first mounting portion; 13. a second avoidance space; 20. a first adjustment assembly; 21. a first movable bracket; 211. a second flange; 2111. a first shaft seat; 212. a second mounting portion; 213. a first connection portion; 2131. a first threaded hole; 214. a fourth mounting portion; 215. a first avoidance space; 22. a first driving member; 221. a first external thread; 23. a first guide shaft; 24. a first shaft support; 25. a second shaft bracket; 26. a first detection assembly; 27. a first detection mating assembly; 30. a second adjustment assembly; 31. a second movable bracket; 311. a third flange; 3111. a second axle seat; 312. a second connecting portion; 313. a third mounting portion; 3131. a first mounting body; 3132. a second mounting body; 3133. a third mounting body; 3134. a second threaded hole; 32. a second driving member; 321. a second external thread; 33. a second guide shaft; 34. a third shaft support; 35. a fourth shaft bracket; 36. a second detection assembly; 37. a second detection mating assembly; 40. a lens; 41. a lens body; 42. a focusing ring; 421. a ring body; 422. a first focusing gear; 423. a blocking part; 50. a focusing drive assembly; 51. a focusing motor; 52. a second focusing gear; 60. a third detection assembly; 70. and (5) fixing the bracket.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1 and 4, a lens adjusting mechanism according to an embodiment of the invention includes a base 10, a first adjusting assembly 20 and a second adjusting assembly 30. The first adjusting assembly 20 includes a first driving member 22 and a first moving bracket 21, the first moving bracket 21 is movably mounted on the base 10, and the first moving bracket 21 is provided with a first avoidance space 215. The first driving element 22 is fixed to the base 10, the first driving element 22 is located in the first avoidance space 215 and is in driving connection with the first moving support 21, and the first driving element 22 is used for driving the first moving support 21 to move along the first direction relative to the base 10. The second adjusting assembly 30 includes a second driving member 32 and a second moving bracket 31 for mounting the lens 40, the second moving bracket 31 is located at a side of the first moving bracket 21 away from the base 10, and the second moving bracket 31 is movably mounted on the first moving bracket 21. The second driving member 32 is fixed to the first moving bracket 21 and is in driving connection with the second moving bracket 31, and the second driving member 32 is used for driving the second moving bracket 31 to move along the second direction relative to the first moving bracket 21.

Wherein the first direction and the second direction are perpendicular. For example, the first direction is transverse and the second direction is longitudinal.

In the above-mentioned lens adjusting mechanism, when the position of the lens 40 in the first direction is to be adjusted, the first driving member 22 is started, and the first driving member 22 drives the first moving bracket 21 to move along the first direction relative to the base 10, so as to drive the second adjusting component 30 and the lens 40 on the first moving bracket 21 to move along the first direction until the lens 40 is adjusted to a proper position. When the position of the lens 40 in the second direction needs to be adjusted, the second driving member 32 is started, and the second driving member 32 drives the second moving bracket 31 to move along the second direction relative to the first moving bracket 21, so as to drive the lens 40 on the second moving bracket 31 to move along the second direction until the lens 40 is adjusted to a proper position. In this way, the lens adjusting mechanism can adjust the position of the lens 40 in the first direction and the second direction, so that the projection device with the lens adjusting mechanism can adapt to the requirements of different scenes. Because the first driving piece 22 is fixed on the base 10, the position of the first movable support 21 corresponding to the first driving piece 22 is provided with the first avoiding space 215, and the first driving piece 22 is positioned in the first avoiding space 215, so that the first movable support 21 can be prevented from moving and interfering with the first driving piece 22 in the moving process along the first direction, and meanwhile, the first movable support 21 and the first driving piece 22 are reasonably arranged, so that the lens adjusting mechanism is compact in structure and beneficial to reducing the volume of the lens adjusting mechanism.

In one embodiment, referring to fig. 1 and 4, the base 10 includes a first flange 11 and a first mounting portion 12, the first mounting portion 12 is connected to one side of the first flange 11, and the first driving member 22 is mounted on the first mounting portion 12. Specifically, the first flange 11 and the first mounting portion 12 are plate-shaped and are located on the same plane, and the extending direction of the first mounting portion 12 is perpendicular to the axis of the light-transmitting hole of the first flange 11. The first movable bracket 21 includes a second mounting portion 212 and a second flange 211, and the second flange 211 is disposed opposite to the first flange 11. One side of the second flange 211, which is close to the first mounting portion 12, includes a first side portion and a second side portion that are sequentially arranged, the second mounting portion 212 is connected to the first side portion, a first avoidance space 215 is formed by surrounding the second mounting portion 212 and the second side portion, the first mounting portion 12 is arranged opposite to the first avoidance space 215, and the second driving member 32 is mounted on the second mounting portion 212. Specifically, the second flange 211 and the second mounting portion 212 are plate-shaped and are located on the same plane, and the extending direction of the second mounting portion 212 is perpendicular to the axis of the light transmission hole of the second flange 211. As such, by providing the first mounting portion 12 and the second mounting portion 212, the first mounting portion 12 and the second mounting portion 212 provide mounting locations for the first driver 22 and the second driver 32, respectively. The second installation portion 212 and the second lateral portion enclose to form a first avoidance space 215, and the first installation portion 12 and the first avoidance space 215 are arranged oppositely, so that motion interference between the first movable support 21 and the first driving piece 22 in the process of moving along the first direction can be avoided, and meanwhile, the lens adjusting mechanism is compact in structure and beneficial to reducing the volume of the lens adjusting mechanism.

Further, referring to fig. 2 and 4, the first moving bracket 21 further includes a first connecting portion 213, the first connecting portion 213 is connected to the second side portion and extends from the second flange 211 in a direction away from the base 10, and the first driving member 22 is in driving connection with the first connecting portion 213. Specifically, the first connection portion 213 has a plate shape, and the extending direction of the first connection portion 213 is parallel to the axis of the light-transmitting hole of the first flange 11. In this way, the connection of the first driving piece 22 to the first moving bracket 21 is achieved.

Alternatively, referring to fig. 2 and 4, the first connecting portion 213 is provided with a first screw hole 2131. The power shaft of the first driving member 22 is inserted into the first threaded hole 2131, the power shaft of the first driving member 22 is provided with a first external thread 221, and the first external thread 221 is in threaded engagement with the first threaded hole 2131. When the lateral position of the lens 40 needs to be adjusted, the first driving member 22 is started, the power shaft of the first driving member 22 rotates, and the first moving bracket 21 moves along the first direction under the cooperation of the first external thread 221 of the first driving member 22 and the first threaded hole 2131, so as to drive the second adjusting component 30 and the lens 40 to move along the first direction until the lens 40 is adjusted to a proper position. In this way, the connection structure between the first moving bracket 21 and the first driving member 22 can be simplified, the connection reliability between the first moving bracket 21 and the first driving member 22 can be improved, the moving precision of the first moving bracket 21 can be improved, and the moving stability of the first moving bracket 21 can be ensured. Of course, in other embodiments, other structures may be used to connect the first driving member 22 to the first moving bracket 21.

In one embodiment, referring to fig. 3 and 4, the second flange 211 is provided with a first shaft seat 2111, and the first shaft seat 2111 is provided with a first shaft hole. The first adjusting assembly 20 further comprises a first guiding shaft 23, and the first guiding shaft 23 is movably inserted into the first shaft hole and fixed to the first flange 11. When the position of the lens 40 in the first direction is to be adjusted, the power shaft of the first driving member 22 rotates, and the first moving bracket 21 is driven by the first driving member 22 to move along the first guiding shaft 23 until the lens 40 is adjusted to a proper position. Thus, by providing the first guide shaft 23, the movement of the first moving bracket 21 along the first direction is guided, and the first moving bracket 21 is prevented from shaking, so that the adjustment of the lens 40 along the first direction is more accurate and efficient.

Specifically, referring to fig. 3 and 4, the first adjusting assembly 20 further includes a first shaft bracket 24 and a second shaft bracket 25, and the first shaft bracket 24 and the second shaft bracket 25 are respectively mounted at two ends of the first guiding shaft 23 and are both mounted on the first flange 11. In this way, by providing the first shaft bracket 24 and the second shaft bracket 25, it is convenient to mount the first guide shaft 23 on the first flange 11.

In this embodiment, referring to fig. 3 and 4, the top and bottom of the second flange 211 are provided with a first shaft seat 2111. The first guide shafts 23 are provided with two, wherein one first guide shaft 23 is installed at a position of the first flange 11 corresponding to the top of the second flange 211 and is inserted into a first shaft hole of the first shaft seat 2111 at the top of the second flange 211. The other first guiding shaft 23 is installed at a position of the first flange 11 corresponding to the bottom of the second flange 211, and is inserted into the first shaft hole of the first shaft seat 2111 at the bottom of the second flange 211.

In one embodiment, referring to fig. 1, 3 and 4, the lens adjustment mechanism further includes a first detecting component 26 and a first detecting mating component 27. The first detecting assembly 26 is mounted on the base 10, and the first detecting mating assembly 27 is mounted on the first moving bracket 21. The first detecting assembly 26 cooperates with the first detecting cooperation assembly 27 to detect the position of the first moving bracket 21 in the first direction. In this way, the first detection component 26 and the first detection matching component 27 detect the matching signal, so as to detect and limit the moving position of the first moving bracket 21 in the first direction, thereby realizing the adjustment control of the off-axis in the first direction.

Further, referring to fig. 1 and 4, a side of the first flange 11 near the second mounting portion 212 includes a third side portion and a fourth side portion that are sequentially disposed, the first mounting portion 12 is connected to the third side portion, and the first mounting portion 12 and the fourth side portion enclose to form a second avoidance space 13. The first detection assembly 26 is mounted on the first mounting portion 12, the detection portion of the first detection assembly 26 is located in the second avoidance space 13, and the first detection matching assembly 27 is mounted on the second mounting portion 212. In this way, the structures of the base 10 and the first moving support 21 are reasonably arranged, so that the first detection assembly 26 mounted on the base 10 and the first detection matching assembly 27 mounted on the first moving support 21 can be matched for detection, and meanwhile, the first moving support 21 is prevented from generating motion interference with the base 10 and parts thereon in the process of moving along the first direction.

Optionally, the first detecting component 26 includes a first light-sensing switch and a first circuit board. The first circuit board is mounted on the first mounting portion 12 and extends into the second avoidance space 13. The first light-sensitive switch is arranged on one side of the first circuit board, which is away from the first installation part 12, and is installed at the position of the first circuit board, which is located in the second avoidance space 13. The first detection matching component 27 includes a first blocking piece, the first blocking piece is mounted on the second mounting portion 212, and when the first blocking piece moves along with the first moving bracket 21 to be opposite to the first light-sensitive switch, the first light-sensitive switch can detect the position of the first moving bracket 21 in the first direction.

In one embodiment, referring to fig. 1, 3 and 4, the second moving bracket 31 further includes a third mounting portion 313 and a third flange 311, and the third flange 311 is disposed opposite to the second flange 211. The third mounting portion 313 is connected to a side of the third flange 311 adjacent to the second mounting portion 212, and the second driving member 32 is in driving connection with the third mounting portion 313. Thus, the structure of the second movable support 31 is reasonably arranged, the second driving piece 32 is reasonably arranged, installation interference is avoided, and meanwhile, the space formed between all the parts is fully utilized, so that the size of the lens adjusting mechanism is reduced.

Further, referring to fig. 2 and 4, the third flange 311 is provided with a second shaft seat 3111, and the second shaft seat 3111 is provided with a second shaft hole. The second adjusting assembly 30 further includes a second guiding shaft 33, where the second guiding shaft 33 is movably inserted into the second shaft hole and fixed to the second flange 211. When the position of the lens 40 in the second direction is to be adjusted, the power shaft of the second driving member 32 rotates, and the second moving bracket 31 moves along the second guiding shaft 33 under the driving of the second driving member 32 until the lens 40 is adjusted to a proper position. Thus, by providing the second guide shaft 33, the movement of the second moving bracket 31 in the second direction is guided, and the second moving bracket 31 is prevented from shaking, so that the adjustment of the lens 40 in the second direction is more accurate and efficient.

Specifically, referring to fig. 2 and 4, the second adjusting assembly 30 further includes a third shaft bracket 34 and a fourth shaft bracket 35, and the third shaft bracket 34 and the fourth shaft bracket 35 are respectively mounted at two ends of the second guiding shaft 33 and are both mounted at the second flange 211. In this way, by providing the third shaft bracket 34 and the fourth shaft bracket 35, the second guide shaft 33 is conveniently mounted on the second flange 211.

In the present embodiment, the second shaft seat 3111 is disposed on both sides of the third flange 311. The two second guide shafts 33 are provided, and the two second guide shafts 33 are respectively installed at positions of the second flange 211 corresponding to two sides of the third flange 311 and are respectively inserted into second shaft holes of the second shaft seats 3111 corresponding to two sides of the third flange 311.

Further, the second moving bracket 31 further includes a second connecting portion 312, and the second connecting portion 312 is connected to a side of the third flange 311 near the second mounting portion 312 and extends from the third flange 311 in a direction away from the first moving bracket 21. The third mounting portion 313 includes a first mounting body 3131 and a second mounting body 3132, the first mounting body 3131 is connected to the second connecting portion 312 and extends from the second connecting portion 312 toward a side away from the third flange 311, and a space adapted to the first connecting portion 213 is formed between a side of the second mounting body 3132 close to the third flange 311 and the second connecting portion 312. The second driving member 32 is located in a space defined by the second mounting portion 312, the first mounting body 3131, and the second mounting body 3132, and the second driving member 32 and the second mounting body 3132 are drivingly connected. In this way, the second mounting body 3132 and the second connecting portion 312 enclose a gap formed therebetween so as to avoid the first connecting portion 213, so that the first connecting portion 213 can move in the second direction, and movement interference is avoided. In addition, the second driver 32 is positioned in a space defined by the second mounting portion 312, the first mounting body 3131, and the second mounting body 3132, so that the space defined between the respective components is fully utilized, and the volume of the lens adjustment mechanism is reduced.

Specifically, the third flange 311, the second connection portion 312, the first mounting body 3131, the second mounting body 3132, and the third mounting body 3133 are each plate-shaped. The second connecting portion 312 is parallel to the axis of the light transmission hole of the third flange 311, one side of the second connecting portion 312 is connected to the second shaft seat 3111 of the third flange 311 near the second mounting portion 212, and the other side is connected to the first mounting body 3131. The extending directions of the first and third mounting bodies 3131 and 3133 are parallel to the axis of the light passing hole of the third flange 311, and the axes of the light passing holes of the second and third mounting bodies 3132 and 311 are perpendicular.

Alternatively, referring to fig. 3 and 4, the second mounting body 3132 is provided with a second screw hole 3134. The power shaft of the second driving member 32 is inserted into the second threaded hole 3134, and the power shaft of the second driving member 32 is provided with a second external thread 321, and the second external thread 321 is in threaded engagement with the second threaded hole 3134. When the position of the lens 40 in the second direction needs to be adjusted, the second driving member 32 is started, the power shaft of the second driving member 32 rotates, and the second moving bracket 31 moves along the second direction under the cooperation of the second external screw thread 321 of the second driving member 32 and the second threaded hole 3134, so as to drive the lens 40 to move along the second direction until the lens 40 is adjusted to a proper position. In this way, the connection structure between the second movable support 31 and the second driving member 32 can be simplified, the connection reliability of the second movable support 31 and the second driving member 32 can be improved, the movement precision of the second movable support 31 can be improved, and the movement stability of the second movable support 31 can be ensured. Of course, in other embodiments, other structures may be used to connect the second driving member 32 to the second moving bracket 31.

Further, referring to fig. 1 and 4, the first moving bracket 21 further includes a fourth mounting portion 214, and the fourth mounting portion 214 is connected to a side of the second mounting portion 212 away from the second flange 211 and extends from the second mounting portion 212 in a direction away from the base 10. Specifically, the fourth mounting portion 214 has a plate shape, and the extending direction of the fourth mounting portion 214 is parallel to the axis of the light passing hole of the first flange 211. The second adjusting component 30 further includes a second detecting component 36 and a second detecting matching component 37, the second detecting component 36 is mounted on the fourth mounting portion 214, and the second detecting matching component 37 is mounted on a side of the first mounting body 3131 away from the third flange 311. The second detecting component 36 cooperates with the second detecting cooperation component 37 to detect the position of the second moving bracket 31 in the second direction. In this way, the second detection component 36 and the second detection matching component 37 detect and limit the moving position of the second moving bracket 31 in the second direction, so as to realize the adjustment control of the off-axis in the second direction.

Optionally, the second detecting component 36 includes a second light-sensing switch and a second circuit board. The second circuit board is mounted on the fourth mounting portion 214, and the second light-sensing switch is mounted on a side of the second circuit board facing away from the fourth mounting portion 214. The second detection matching component 37 includes a second blocking piece, the second blocking piece is mounted on a side of the first connection portion 213 away from the third flange 311, and when the second blocking piece moves along with the second moving bracket 31 to be opposite to the second light-sensitive switch, the second light-sensitive switch can detect the position of the second moving bracket 31 in the second direction.

In one embodiment, referring to fig. 4, the lens adjustment mechanism further includes a lens 40, and the lens 40 is connected to the third flange 311. Further, the lens 40 includes a lens body 41 and a focusing ring 42, the focusing ring 42 is sleeved on the outer peripheral surface of the lens body 41; the lens adjusting mechanism further includes a focusing driving assembly 50, where the focusing driving assembly 50 is mounted on the third mounting portion 313 and connected to the focusing ring 42, and the focusing driving assembly 50 is used for driving the focusing ring 42 to rotate so as to drive the lens body 41 to rotate, so that the lens body 41 moves along the axial direction thereof. If the definition of the projection image is low, the focusing driving assembly 50 drives the focusing ring 42 to rotate, and the focusing ring 42 drives the lens body 41 to rotate, so that the lens body 41 moves along the axial direction thereof to realize automatic focusing.

Further, referring to fig. 1 and 4, the focusing ring 42 includes a first focusing gear 422 and a ring body 421, the ring body 421 is sleeved on the outer peripheral surface of the lens body 41, and the first focusing gear 422 is disposed on the outer peripheral surface of the ring body 421. The focus driving assembly 50 includes a focus motor 51 and a second focus gear 52, and the second focus gear 52 is connected to a power shaft of the focus motor 51 and engaged with the first focus gear 422. If the definition of the projection picture is low, the focusing motor 51 drives the second focusing gear 52 to rotate, the second focusing gear 52 is meshed with the first focusing gear 422 to drive the focusing ring 42 to rotate, and the focusing ring 42 drives the lens body 41 to rotate so as to enable the lens body 41 to axially move, thereby realizing automatic focusing.

Further, referring to fig. 1, 2 and 4, the third mounting portion 313 further includes a third mounting body 3133, the third mounting body 3133 is connected to a side of the first mounting body 3131 remote from the second mounting body 3132, and extends from the first mounting body 3131 in a direction remote from the first moving bracket 21, and the focus driving assembly 50 is mounted to the third mounting body 3133. In this way, the focus drive assembly 50 is conveniently installed.

In one embodiment, referring to fig. 1, 2 and 4, the lens adjustment mechanism further includes a third detecting assembly 60, the third detecting assembly 60 is mounted on the second moving bracket 31, and the third detecting assembly 60 is disposed on a side portion of the focusing ring 42. The part of the outer peripheral surface of the focusing ring 42 is provided with a blocking portion 423, the blocking portion 423 extends along the circumferential direction of the focusing ring 42, the blocking portion 423 can be opposite to the third detecting assembly 60 when rotating along with the focusing ring 42, and the third detecting assembly 60 is used for detecting the rotation position of the focusing ring 42. If the definition of the projection image is low, the focusing driving assembly 50 drives the focusing ring 42 to rotate, and when the blocking portion 423 rotates along with the focusing ring 42 to be opposite to the third detecting assembly 60, the focusing driving assembly 50 is controlled to rotate, so as to ensure that the lens body 41 moves within a predetermined movement range.

Optionally, the third detecting component 60 includes a transmitting end and a receiving end, where the transmitting end and the receiving end are disposed at intervals along the axial direction of the focusing ring 42. When the blocking part 423 rotates with the focus ring 42 to a position between the transmitting end and the receiving end, the third detecting assembly 60 can detect the rotation position of the focus ring 42.

Further, the projection apparatus further includes a fixing bracket 70, the fixing bracket 70 is mounted to the third mounting portion 313, and the third detecting assembly 60 is mounted on a side of the lens 40 away from the focus driving assembly 50 through the fixing bracket 70. Specifically, the fixing bracket 70 is mounted to the third mounting body 3133. In this way, the third detecting component 60 and the focusing component are respectively arranged on two opposite sides of the lens 40, so that installation interference is avoided, and detection precision is improved.

An embodiment of the present invention provides a projection apparatus including the lens adjusting mechanism of any one of the above embodiments.

The projection device includes a lens adjusting mechanism, and the lens adjusting mechanism can adjust the position of the lens 40 in the first direction and the second direction, so that the projection device with the lens adjusting mechanism can adapt to the requirements of different scenes. Because the first driving piece 22 is fixed on the base 10, the position of the first movable support 21 corresponding to the first driving piece 22 is provided with the first avoiding space 215, and the first driving piece 22 is positioned in the first avoiding space 215, so that the first movable support 21 can be prevented from moving and interfering with the first driving piece 22 in the moving process along the first direction, and meanwhile, the first movable support 21 and the first driving piece 22 are reasonably arranged, so that the lens adjusting mechanism is compact in structure and beneficial to reducing the volume of the lens adjusting mechanism.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A lens adjustment mechanism, comprising:

the base comprises a first flange and a first installation part, and the first installation part is connected to one side of the first flange;

the first adjusting assembly comprises a first movable support and a first driving piece, the first movable support is movably mounted on the base, a first avoidance space is formed in the first movable support, the first movable support comprises a second flange and a second mounting portion, the second flange and the first flange are oppositely arranged, one side of the second flange, which is close to the first mounting portion, comprises a first side portion and a second side portion which are sequentially arranged, the second mounting portion is connected to the first side portion, the first avoidance space is formed by encircling the second mounting portion and the second side portion, and the first mounting portion and the first avoidance space are oppositely arranged; the first driving piece is fixed on the base, is installed on the first installation part, is positioned in the first avoidance space, is in driving connection with the first movable support, and is used for driving the first movable support to move along a first direction relative to the base;

the second adjusting assembly comprises a second driving piece and a second movable bracket for installing a lens, the second movable bracket is positioned on one side of the first movable bracket, which is away from the base, and is movably installed on the first movable bracket, the second driving piece is fixed on the second installation part of the first movable bracket and is in driving connection with the second movable bracket, and the second driving piece is used for driving the second movable bracket to move along a second direction relative to the first movable bracket; wherein the first direction and the second direction are perpendicular;

the first flange is close to one side of the second installation portion and comprises a third side portion and a fourth side portion which are sequentially arranged, the first installation portion is connected to the third side portion, a second avoidance space is formed by surrounding the first installation portion and the fourth side portion, the first detection assembly is installed on the first installation portion, the detection portion of the first detection assembly is located in the second avoidance space, the first detection matching assembly is installed on the second installation portion, and the first detection assembly is matched with the first detection matching assembly and used for detecting the position of the first movable support in the first direction.

2. The lens adjusting mechanism of claim 1, wherein the first movable bracket further comprises a first connecting portion connected to the second side portion and extending from the second flange in a direction away from the base, and the first driving member is drivingly connected to the first connecting portion.

3. The lens adjusting mechanism according to claim 1, wherein the second flange is provided with a first shaft seat, and the first shaft seat is provided with a first shaft hole; the first adjusting assembly further comprises a first guide shaft which is movably inserted into the first shaft hole and fixed to the first flange.

4. The lens adjusting mechanism according to claim 2, wherein the second movable bracket further includes a third flange, a second connecting portion and a third mounting portion, the third flange is disposed opposite to the second flange, the second connecting portion is connected to a side of the third flange close to the second mounting portion and extends from the third flange in a direction away from the first movable bracket, the third mounting portion includes a first mounting body and a second mounting body, the first mounting body is connected to the second connecting portion and extends from the second connecting portion in a direction away from the third flange, the second mounting body is connected to the first mounting body and extends from the first mounting body in a direction close to the first movable bracket, a space adapted to the first connecting portion is formed between a side of the second mounting body close to the third flange and the second connecting portion, and the second driving member is located in the second mounting portion, the first mounting body and the second mounting body and forms a second driving space.

5. The lens adjusting mechanism as claimed in claim 4, wherein the third flange is provided with a second shaft mount, the second shaft mount being provided with a second shaft hole; the second adjusting assembly further comprises a second guide shaft movably inserted into the second shaft hole and fixed to the second flange.

6. The lens adjusting mechanism according to claim 4, wherein the first moving bracket further includes a fourth mounting portion connected to a side of the second mounting portion remote from the second flange and extending from the second mounting portion in a direction away from the base; the second adjusting component further comprises a second detecting component and a second detecting matching component, the second detecting matching component is mounted on one side, far away from the third flange, of the first mounting main body, the second detecting component is mounted on the fourth mounting portion, and the second detecting component is matched with the second detecting matching component and used for detecting the position of the second movable support in the second direction.

7. The lens adjustment mechanism of claim 4, further comprising a lens, the lens being coupled to the third flange;

the lens comprises a lens body and a focusing ring, and the focusing ring is sleeved on the outer peripheral surface of the lens body; the lens adjusting mechanism further comprises a focusing driving assembly, the focusing driving assembly is mounted on the third mounting portion and connected with the focusing ring, and the focusing driving assembly is used for driving the focusing ring to rotate so as to drive the lens body to rotate, so that the lens body moves along the axial direction of the lens body.

8. The lens adjusting mechanism as claimed in claim 7, wherein the third mount portion further includes a third mount body connected to a side of the first mount body away from the second mount body and extending from the first mount body in a direction away from the first moving bracket, the focus drive assembly being mounted to the third mount body.

9. The lens adjusting mechanism as claimed in claim 7, further comprising a third detecting member and a fixing bracket, wherein the fixing bracket is mounted on the third mounting portion, the third detecting member is mounted on a side of the lens body away from the focus driving member through the fixing bracket, a blocking portion is provided on a part of an outer circumferential surface of the focus ring, the blocking portion extends along a circumferential direction of the focus ring, the blocking portion can be opposite to the third detecting member when rotating with the focus ring, and the third detecting member is used for detecting a rotation position of the focus ring.

10. A projection apparatus comprising a lens adjustment mechanism as claimed in any one of claims 1 to 9.