Automatic zooming and focusing device and projection equipment

Abstract

The utility model relates to an automatic zooming and focusing device. The automatic zooming and focusing device comprises a fixed lens cone, a zooming module, a focusing module, a position detection module and a driving module, the zoom module comprises a zoom ring and a zoom lens group. The zoom ring is rotatably connected to the fixed lens barrel in the radial direction of the optical axis direction. The focusing module comprises a focusing ring and a focusing lens group in transmission connection with the focusing ring, and the focusing ring is rotatably connected to the fixed lens barrel in the radial direction of the optical axis direction. The position detection module is used for acquiring real-time positions of the zoom lens group and the focusing lens group relative to the fixed lens barrel. And the driving module is used for driving the zoom ring and the focusing ring to rotate according to the real-time positions of the zoom lens group and the focusing lens group so as to drive the zoom lens group and the focusing lens group to move relative to the fixed lens barrel in the optical axis direction. The automatic zooming and focusing device provided by the utility model is beneficial to improving the working efficiency of automatic zooming and focusing. The utility model further relates to projection equipment comprising the automatic zooming and focusing device.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to an automatic zooming and focusing device and a projection device comprising the automatic zooming and focusing device. Background Art

[0002] The lenses of existing cameras or projection devices often need to adjust their focal length or throw ratio to obtain clearer images. Current drive modules primarily use optical coupling sensing technology to determine the rotation angle of the gears, and thus the relative positions of the zoom lens group and the focus lens group relative to the fixed lens barrel of the optical machine housing. When using this technology for automatic zooming and focusing, the gears need to be completely retracted to the starting optical coupling position, and then the motor and gears need to be pushed forward to rotate to the focus ring position for a clear focus. Each automatic zooming and focusing operation requires returning to the starting optical coupling. Repeatedly returning to the starting optical coupling significantly prolongs the automatic zooming and focusing time, thereby reducing the efficiency of the automatic zooming and focusing operation. Utility Model Content

[0003] The present application discloses an automatic zooming and focusing device and a projection device, which are beneficial to improving the working efficiency of automatic zooming and focusing.

[0004] In a first aspect, the present application relates to an automatic zoom and focus adjustment device, comprising:

[0005] Fixed lens barrel;

[0006] A zoom module, comprising a zoom ring and a zoom lens group transmission-connected to the zoom ring, wherein the zoom ring is rotatably connected to the fixed lens barrel in a radial direction of the optical axis;

[0007] A focusing module, comprising a focusing ring and a focusing lens group drivingly connected to the focusing ring, wherein the focusing ring is rotatably connected to the fixed lens barrel in a radial direction of the optical axis;

[0008] a position detection module, comprising a zoom distance detection module and a focus distance detection module, wherein the zoom distance detection module is used to obtain the real-time position of the zoom lens group relative to the fixed lens barrel; and the focus distance detection module is used to obtain the real-time position of the focus lens group relative to the fixed lens barrel; and

[0009] A driving module is used to drive the zoom ring and the focusing ring to rotate according to the real-time positions of the zoom lens group and the focusing lens group relative to the fixed lens barrel, so as to drive the zoom lens group and the focusing lens group to move relative to the fixed lens barrel in the direction of the optical axis.

[0010] The automatic zoom and focus device provided in the embodiment of the present application is provided with a position detection module to obtain the real-time position of the zoom lens group relative to the fixed lens barrel and the real-time position of the focus lens group relative to the fixed lens barrel, and then a driving module is provided to drive the zoom ring and the focus ring to rotate according to the real-time positions of the zoom lens group and the focus lens group relative to the fixed lens barrel, so as to drive the zoom lens group and the focus lens group to move relative to the fixed lens barrel in the direction of the optical axis, thereby more effectively adjusting the focal length of the zoom lens group and the focus lens group; compared with the method using optical coupling As for the sensing technology to determine the position of the zoom lens group or the focusing lens group relative to the fixed lens barrel, there is no need to return the gear to the position of the starting optical coupler every time. The real-time position of the zoom lens group and the focusing lens group relative to the fixed lens barrel can be obtained in real time, which is beneficial to reducing the working time during zooming and focusing, and is beneficial to improving the working efficiency of automatic zooming and focusing; when the above-mentioned automatic zooming and focusing device is applied to projection equipment, it is beneficial to improve the working efficiency of the projection equipment during automatic zooming and focusing, thereby facilitating the realization of the automatic zooming and focusing function of the projection equipment, and is beneficial to improving the user experience.

[0011] In one embodiment, the zoom distance detection module includes a first magnetic member and a first magnetic sensor, one of the first magnetic member and the first magnetic sensor is disposed on the zoom lens assembly, and the other is fixed relative to the fixed lens barrel, and the first magnetic sensor is used to detect a magnetic signal of the first magnetic member in real time to obtain a real-time position of the zoom lens assembly relative to the fixed lens barrel;

[0012] The focusing distance detection module includes a second magnetic member and a second magnetic sensor. One of the second magnetic member and the second magnetic sensor is arranged on the focusing lens group, and the other is fixed relative to the fixed lens barrel. The second magnetic sensor is used to detect the magnetic signal of the second magnetic member in real time to obtain the real-time position of the focusing lens group relative to the fixed lens barrel.

[0013] In one embodiment, the fixed lens barrel includes a barrel and a fixing plate arranged in a radial direction of the barrel;

[0014] The first magnetic member is disposed on the zoom lens assembly, and the first magnetic sensor is disposed on the fixing plate and fixed relative to the fixing lens barrel.

[0015] In one embodiment, the fixed lens barrel includes a barrel and a fixing plate arranged in a radial direction of the barrel;

[0016] The second magnetic member is disposed on the focusing lens assembly, and the second magnetic sensor is disposed on the fixing plate and fixed relative to the fixing lens barrel.

[0017] In one embodiment, the driving module includes a zoom driving module and a focus adjusting driving module;

[0018] The zoom drive module is used to drive the zoom ring to rotate, and the zoom ring rotates around the optical axis while driving the zoom module to move relative to the fixed lens barrel in the direction of the optical axis; the focus drive module is used to drive the focus ring to rotate, and the focus ring rotates around the optical axis while driving the focus module to move relative to the fixed lens barrel in the direction of the optical axis.

[0019] In one embodiment, the zoom driving module includes a first motor, a first zoom transmission member and a second zoom transmission member; the first zoom transmission member is connected to the driving end of the first motor, the second zoom transmission member is connected to the zoom ring, and the second zoom transmission member and the first zoom transmission member are engaged for transmission.

[0020] In one embodiment, the zoom ring includes a first sleeve ring and at least one first fixing hole formed on the first sleeve ring; the fixed lens barrel further includes a first limiting hole extending therethrough;

[0021] The zoom lens assembly includes a first transmission barrel and at least one first zoom transmission rod fixedly connected to the first transmission barrel. At least one zoom lens is fixed to the first transmission barrel. One end of the first zoom transmission rod is fixedly connected to the first transmission barrel, and the other end passes through the first limiting hole and is fixed in the first fixing hole. The first limiting hole is inclined relative to the circumferential direction of the fixed lens barrel, and the first limiting hole and the first zoom transmission rod are limitedly engaged.

[0022] When the second zoom transmission member and the first zoom transmission member are engaged for transmission, the zoom ring rotates around the optical axis and drives the first zoom transmission rod to move relative to the fixed lens barrel in the direction of the optical axis.

[0023] In one embodiment, the first zoom transmission member is a transmission gear, the second zoom transmission member is a transmission rack, and the first motor is used to adjust the rotation direction and rotation angle of the first zoom transmission member according to the magnetic signal detected by the first magnetic sensor, so as to adjust the movement distance of the zoom module relative to the fixed lens barrel in the direction of the optical axis.

[0024] In one embodiment, the focusing drive module includes a second motor, a first focusing transmission member and a second focusing transmission member, the first focusing transmission member is connected to the driving end of the second motor, the second focusing transmission member is connected to the focusing ring, and the first focusing transmission member and the second focusing transmission member are engaged for transmission.

[0025] In one embodiment, the focus ring includes a second ring and at least one second limiting hole formed on the second ring;

[0026] The focusing lens assembly includes a second transmission cylinder and at least one first focusing transmission rod fixedly connected to the second transmission cylinder, the second transmission cylinder is fixed with at least one focusing lens, the first focusing transmission rod is partially embedded in the second limiting hole, the second limiting hole is limitedly engaged with the first focusing transmission rod, and the second limiting hole is inclined relative to the circumferential direction of the second ring;

[0027] When the first focusing transmission member and the second focusing transmission member are engaged for transmission, the focusing ring rotates around the optical axis and drives the first focusing transmission rod to move relative to the fixed lens barrel in the direction of the optical axis.

[0028] In one embodiment, the first focusing transmission member is a transmission gear, the second focusing transmission member is a transmission rack, and the second motor is used to adjust the rotation direction and rotation angle of the first focusing transmission member according to the magnetic signal detected by the second magnetic sensor, so as to adjust the movement distance of the focusing ring relative to the fixed lens barrel in the direction of the optical axis.

[0029] In a second aspect, the present application also relates to a projection device, comprising:

[0030] an optical-mechanical housing; and

[0031] The automatic zoom and focus adjustment device as described in any of the above embodiments is installed on the optical machine housing.

[0032] The projection device provided by the embodiment of the present application is provided with the automatic zoom and focus adjustment device described in any of the above embodiments, wherein a position detection module obtains the real-time position of the zoom lens group relative to the fixed lens barrel and the real-time position of the focus lens group relative to the fixed lens barrel, and then a driving module is provided to drive the zoom ring and the focus ring to rotate according to the real-time positions of the zoom lens group and the focus lens group relative to the fixed lens barrel, so as to drive the zoom lens group and the focus lens group to move relative to the fixed lens barrel in the direction of the optical axis, thereby more effectively adjusting the focal length of the zoom lens group and the focus lens group. Compared with using optical coupling sensing technology to determine the position of the zoom lens group or the focus lens group relative to the fixed lens barrel, there is no need to return the gear to the starting optical coupling position each time, and the real-time position of the zoom lens group and the focus lens group relative to the fixed lens barrel can be obtained in real time, which is conducive to reducing the working time during zooming and focusing, and is conducive to improving the working efficiency of the automatic zooming and focusing of the projection device, thereby facilitating the realization of the automatic zooming and focusing function of the projection device and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 It is a structural diagram of the automatic zoom and focus adjustment device in one embodiment of the present application.

[0035] Figure 2 yes Figure 1 Schematic cross-sectional view along line II-II.

[0036] Figure 3 It is a structural schematic diagram of the first limiting hole of the automatic zoom and focus adjustment device in one embodiment of the present application.

[0037] Figure 4 It is a structural schematic diagram of the second limiting hole of the automatic zoom and focus adjustment device in one embodiment of the present application.

[0038] Figure 5 It is a module schematic diagram of a projection device in one embodiment of the present application.

[0039] Description of main component symbols

[0040] Automatic zoom and focus adjustment device 100

[0041] Fixed lens barrel 1

[0042] Cylinder 11

[0043] First limiting hole 111

[0044] Median line 111a

[0045] First accommodating chamber 13

[0046] Fixed plate 15

[0047] Mounting plate 17

[0048] Zoom module 2

[0049] Zoom ring 21

[0050] First set of rings 211

[0051] First fixing hole 213

[0052] Zoom lens group 23

[0053] First transmission cylinder 231

[0054] Zoom lens 2311

[0055] First zoom transmission rod 233

[0056] Focusing module 3

[0057] Focus ring 31

[0058] Second ring 311

[0059] Second limiting hole 313

[0060] Median line 313a

[0061] Focusing lens group 33

[0062] Second transmission cylinder 331

[0063] Focusing lens 3311

[0064] First focusing transmission rod 333

[0065] Position detection module 5

[0066] Zoom distance detection module 51

[0067] First magnetic member 511

[0068] First magnetic sensor 513

[0069] Focus distance detection module 53

[0070] The second magnetic member 531

[0071] Second magnetic sensor 533

[0072] Driver module 7

[0073] Zoom drive module 71

[0074] First motor 711

[0075] First zoom transmission member 713

[0076] Second zoom transmission member 715

[0077] Focusing drive module 73

[0078] Second motor 731

[0079] First focusing transmission member 733

[0080] Second focusing transmission member 735

[0081] Projection equipment 900

[0082] Optical machine housing 901

[0083] Control module 903

[0084] Power module 905

[0085] Optical axis direction X

[0086] Distance H, H1, H2, H3 DETAILED DESCRIPTION

[0087] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0088] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly attached to the other component or there may be a central component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0089] It should be noted that the concepts of "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0090] Please also refer to Figure 1 and Figure 2 The automatic zoom and focus device 100 of the embodiment of the present application includes a fixed lens barrel 1, a zoom module 2, a focus module 3, a position detection module 5, and a drive module 7. The zoom module 2 and the focus module 3 are partially accommodated in the fixed lens barrel 1. The position detection module 5 is used to obtain the real-time position of the zoom module 2 and the focus module 3 relative to the fixed lens barrel 1. The drive module 7 is used to drive the zoom module 2 and the focus module 3 to rotate, so that the zoom module 2 and the focus module 3 rotate around the optical axis direction X while driving the zoom module 2 to move relative to the fixed lens barrel 1 in the optical axis direction X.

[0091] The fixed lens barrel 1 includes a barrel 11, a first accommodating chamber 13, a fixing plate 15, and a mounting plate 17. The barrel 11 is generally sleeve-shaped and can be made of any of plastic, metal, and glass. For example, the barrel 11 can be made of polycarbonate (PC) or polyphenylene sulfide (PPS). A first limiting hole 111 is formed through the barrel 11 to assist in driving the zoom module 2.

[0092] The first accommodating chamber 13 is formed by the cylindrical body 11, and the zoom module 2 and the focus adjustment module 3 are partially accommodated in the first accommodating chamber 13. In some embodiments, the first accommodating chamber 13 is also used to secure the lens (not shown) and the main control circuit board (not shown). Components such as spacers, locking rings, and sealing rings may also be provided in the first accommodating chamber 13 to facilitate mounting the lens within the first accommodating chamber 13.

[0093] The fixing plate 15 is fixed in the radial direction of the barrel 11. The fixing plate 15 is used to fix the drive module 7. The mounting plate 17 is connected to the barrel 11 and the fixing plate 15 and is arranged at one end of the barrel 11. The fixed lens barrel 1 is mounted on the optical machine housing (not shown) through the mounting plate 17, so as to facilitate disassembly and assembly. In this embodiment, the zoom module 2 and the focusing module 3 are partially rotatably connected to the barrel 11 along the radial direction of the optical axis direction X, and the focusing module 3 is rotatably connected to the other end of the barrel 11; in other embodiments, the zoom module 2 can also be connected to the end of the barrel 11 away from the mounting plate 17, and this application does not impose any restrictions.

[0094] Please also refer to Figure 2 and Figure 3 The zoom module 2 includes a zoom ring 21 and a zoom lens group 23 that is transmission-connected to the zoom ring 21. The zoom ring 21 is rotatably connected to the fixed lens barrel 1 in the radial direction of the optical axis direction X. Specifically, the zoom ring 21 is rotatably connected to the outer surface of the fixed lens barrel 1 in the radial direction of the optical axis direction X. The zoom ring 21 includes a first sleeve 211 and at least one first fixing hole 213 opened on the first sleeve 211. The zoom lens group 23 includes a first transmission cylinder 231 and at least one first zoom transmission rod 233 fixed to the first transmission cylinder 231. In this embodiment, the first transmission cylinder 231 is fixed with a zoom lens 2311; in other embodiments, the first transmission cylinder 231 can be fixed with two or more zoom lenses 2311, and this application does not limit this.

[0095] One end of the first zoom transmission rod 233 is fixedly connected to the first transmission cylinder 231, and the other end passes through the first limiting hole 111 of the cylinder body 11 and is fixed in the first fixing hole 213 of the first collar 211. The first limiting hole 111 is inclined relative to the circumferential direction of the cylinder body 11, that is, the distance H between each point on the midline 111a in the long diameter direction of the first limiting hole 111 and the mounting plate 17 gradually decreases or increases from one end of the midline 111a to the other end. Figure 3 As shown in , H1>H2>H3; by setting the first limiting hole 111 to be inclined relative to the circumferential direction of the barrel 11, the first zoom transmission rod 233 can be displaced relative to the fixed lens barrel 1 in the optical axis direction X while rotating along the optical axis direction X, thereby driving the first transmission barrel 231 to be displaced along the optical axis direction X. The first limiting hole 111 is limited in cooperation with the first zoom transmission rod 233. In this embodiment, the number of the first fixing holes 213, the number of the first zoom transmission rods 233, and the number of the first limiting holes 111 are all three; in other embodiments, the number of the first fixing holes 213, the number of the first zoom transmission rods 233, and the number of the first limiting holes 111 can also be one, two, or more, and this application does not impose any limitation thereto.

[0096] When the driving module 7 drives the zoom module 2 to rotate, the zoom ring 21 in the zoom module 2 rotates, and the first zoom transmission rod 233 fixed to the first fixing hole 213 rotates accordingly; since the other end of the first zoom transmission rod 233 is embedded in the first limiting hole 111 opened on the barrel 11, and the first limiting hole 111 is inclined relative to the circumferential direction of the barrel 11, the first zoom transmission rod 233 rotates along the optical axis direction X while also moving relative to the fixed lens barrel 1 in the optical axis direction X, that is, the first zoom transmission rod 233 is displaced along the optical axis direction X, and the first zoom transmission rod 233 is fixed to the first transmission barrel 231, so that the first transmission barrel 231 fixed with at least one zoom lens 2311 is also displaced along the optical axis direction X.

[0097] Please also refer to Figure 2 and Figure 4The focusing module 3 includes a focusing ring 31 and a focusing lens group 33 that is transmission-connected to the focusing ring 31. The focusing ring 31 is rotatably connected to the fixed lens barrel 1 in the radial direction of the optical axis direction X. Specifically, the focusing ring 31 is rotatably connected to the outer surface of the fixed lens barrel 1 in the radial direction of the optical axis direction X. The focusing ring 31 includes a second sleeve 311 and at least one second limiting hole 313 formed on the second sleeve 311. The focusing lens group 33 includes a second transmission cylinder 331 and at least one first focusing transmission rod 333 fixed to the second transmission cylinder 331. The second transmission cylinder 331 is fixed with at least one focusing lens 3311. In this embodiment, the second transmission cylinder 331 is fixed with one focusing lens 3311; in other embodiments, the second transmission cylinder 331 is fixed with two or more focusing lenses 3311, which is not limited in this application.

[0098] One end of the first focusing transmission rod 333 is fixedly connected to the second transmission cylinder 331, and the other end is embedded in the second limiting hole 313. The second limiting hole 313 is limitedly engaged with the first focusing transmission rod 333. The second limiting hole 313 is inclined relative to the circumferential direction of the second ring 311, that is, the distance H between each point on the midline 313a in the long diameter direction of the second limiting hole 313 and the mounting plate 17 gradually decreases or increases from one end of the midline 313a to the other end. Figure 4 As shown in , H1>H2>H3; by arranging the second limiting hole 313 to be inclined relative to the circumferential direction of the barrel 11, the first focus transmission rod 333 can be caused to displace relative to the fixed lens barrel 1 in the optical axis direction X while rotating along the optical axis direction X, thereby driving the second transmission barrel 331 to displace along the optical axis direction X. In this embodiment, the number of the first focus transmission rods 333 and the number of the second limiting holes 313 are both six; in other embodiments, the number of the first focus transmission rods 333 and the number of the second limiting holes 313 can also be one, two, or more, and this application does not impose any limitation.

[0099] When the driving module 7 drives the focusing module 3 to rotate, the focusing ring 31 in the focusing module 3 rotates, and the first focusing transmission rod 333, one end of which is embedded in the second limiting hole 313, rotates accordingly; and the second limiting hole 313 is inclined relative to the circumferential direction of the barrel 11, so the first focusing transmission rod 333 rotates along the optical axis direction X while also moving relative to the fixed lens barrel 1 in the optical axis direction X, that is, the first focusing transmission rod 333 is displaced along the optical axis direction X, and since the other end of the first focusing transmission rod 333 is fixed to the second transmission barrel 331, the second transmission barrel 331, which is fixed with at least one focusing lens 3311, is also displaced along the optical axis direction X.

[0100] Please refer to Figure 1 and Figure 2 The position detection module 5 includes a zoom distance detection module 51 and a focus distance detection module 53. The zoom distance detection module 51 is used to obtain the real-time position of the zoom lens group 23 relative to the fixed lens barrel 1. The zoom distance detection module 51 includes a first magnetic member 511 and a first magnetic sensor 513. One of the first magnetic member 511 and the first magnetic sensor 513 is set on the zoom lens group 23, and the other is fixed relative to the fixed lens barrel 1. The first magnetic sensor 513 is used to detect the magnetic signal of the first magnetic member 511 in real time to obtain the real-time position of the zoom lens group 23 relative to the fixed lens barrel 1.

[0101] In this embodiment, the first magnetic member 511 is disposed on the zoom lens assembly 23, and the first magnetic sensor 513 is disposed on the fixed plate 15 and fixed relative to the fixed lens barrel 1. Specifically, the first magnetic member 511 is fixed to the first transmission cylinder 231 and moves along with the first transmission cylinder 231 along the optical axis direction X. In other embodiments, the first magnetic member 511 is disposed on the fixed plate 15 and fixed relative to the fixed lens barrel 1, and the first magnetic sensor 513 is fixed to the first transmission cylinder 231 and moves along with the first transmission cylinder 231 along the optical axis direction X, but this application is not limited thereto.

[0102] The focusing distance detection module 53 is used to obtain the real-time position of the focusing lens group 33 relative to the fixed lens barrel 1. The focusing distance detection module 53 includes a second magnetic member 531 and a second magnetic sensor 533. One of the second magnetic member 531 and the second magnetic sensor 533 is disposed on the focusing lens group 33, and the other is fixed relative to the fixed lens barrel 1. The second magnetic sensor 533 is used to detect the magnetic signal of the second magnetic member 531 in real time to obtain the real-time position of the focusing lens group 33 relative to the fixed lens barrel 1.

[0103] In this embodiment, the second magnetic member 531 is disposed on the focusing lens assembly 33, and the second magnetic sensor 533 is disposed on the fixed plate 15 and fixed relative to the fixed lens barrel 1. Specifically, the second magnetic member 531 is fixed to the second transmission cylinder 331 and moves along with the second transmission cylinder 331 along the optical axis direction X. In other embodiments, the second magnetic member 531 is disposed on the fixed plate 15 and fixed relative to the fixed lens barrel 1, and the second magnetic sensor 533 is fixed to the second transmission cylinder 331 and moves along with the second transmission cylinder 331 along the optical axis direction X, but this application is not limited thereto.

[0104] The automatic zoom and focus adjustment device 100 provided in the embodiment of the present application is provided with a zoom distance detection module 51 and a focus distance detection module 53. The first magnetic sensor 513 detects the magnetic signal of the first magnetic member 511 in real time, and the second magnetic sensor 533 detects the magnetic signal of the second magnetic member 531 in real time. Due to the use of magnetic induction, the first magnetic sensor 513 and the second magnetic sensor 533 can respectively quickly obtain the real-time positions of the first magnetic member 511 and the second magnetic member 531, thereby respectively quickly obtaining the real-time positions of the zoom lens group 23 and the focusing lens group 33. Compared with the use of optical coupling sensing technology to determine the position of the zoom lens group 23 or the focusing lens group 33 relative to the fixed lens barrel 1, there is no need to return the gear to the starting optical coupling position each time, and the real-time positions of the zoom lens group 23 and the focusing lens group 33 relative to the fixed lens barrel 1 can be obtained in real time, which is beneficial to reducing the working time during zooming and focusing, not only improving the working efficiency of automatic zooming and focusing, but also improving the accuracy of the automatic zoom and focus adjustment device 100.

[0105] Please refer to Figure 1 、 Figure 2 and Figure 3 The driving module 7 is used to drive the zoom ring 21 and the focus ring 31 to rotate according to the real-time position of the zoom lens group 23 and the focus lens group 33 relative to the fixed lens barrel 1, so as to drive the zoom lens group 23 and the focus lens group 33 to move relative to the fixed lens barrel 1 in the optical axis direction X.

[0106] The drive module 7 includes a zoom drive module 71 and a focus adjustment drive module 73. The zoom drive module 71 is used to drive the zoom ring 21 to rotate. As the zoom ring 21 rotates about the optical axis X, it simultaneously drives the zoom module 2 to move relative to the fixed lens barrel 1 in the optical axis X. The zoom drive module 71 includes a first motor 711, a first zoom transmission member 713, and a second zoom transmission member 715. The first zoom transmission member 713 is connected to the drive end of the first motor 711, and the second zoom transmission member 715 is connected to the zoom ring 21. The second zoom transmission member 715 and the first zoom transmission member 713 engage and transmit power.

[0107] Specifically, the first zoom transmission member 713 is a transmission gear, and the second zoom transmission member 715 is a transmission rack. The first motor 711 is used to adjust the rotation direction and angle of the first zoom transmission member 713 based on the magnetic signal detected by the first magnetic sensor 513, thereby adjusting the movement distance of the zoom module 2 relative to the fixed lens barrel 1 along the optical axis direction X. When the second zoom transmission member 715 and the first zoom transmission member 713 are engaged and transmitted, the zoom ring 21 rotates about the optical axis direction X and simultaneously drives the first zoom transmission rod 233 to move relative to the fixed lens barrel 1 along the optical axis direction X.

[0108] The focus drive module 73 is used to drive the focus ring 31 to rotate. As the focus ring 31 rotates about the optical axis X, it simultaneously drives the focus module 3 to move relative to the fixed lens barrel 1 in the optical axis X. The focus drive module 73 includes a second motor 731, a first focus transmission member 733, and a second focus transmission member 735. The first focus transmission member 733 is connected to the driving end of the second motor 731, and the second focus transmission member 735 is connected to the focus ring 31. The first focus transmission member 733 and the second focus transmission member 735 engage and transmit power.

[0109] Specifically, the first focus transmission member 733 is a transmission gear, the second focus transmission member 735 is a transmission rack, and the second motor 731 is used to adjust the rotation direction and angle of the first focus transmission member 733 based on the magnetic signal detected by the second magnetic sensor 533, thereby adjusting the movement distance of the focus ring 31 relative to the fixed lens barrel 1 in the optical axis direction X. When the first focus transmission member 733 and the second focus transmission member 735 are engaged, the focus ring 31 rotates about the optical axis direction X and simultaneously drives the first focus transmission rod 333 to move relative to the fixed lens barrel 1 in the optical axis direction X.

[0110] The automatic zoom and focus device 100 provided in the embodiment of the present application is provided with a position detection module 5 to obtain the real-time position of the zoom lens group 23 relative to the fixed lens barrel 1 and the real-time position of the focus lens group 33 relative to the fixed lens barrel 1, and then provided with a driving module 7 to drive the zoom ring 21 and the focus ring 31 to rotate according to the real-time position of the zoom lens group 23 and the focus lens group 33 relative to the fixed lens barrel 1, so as to drive the zoom lens group 23 and the focus lens group 33 to move relative to the fixed lens barrel 1 in the optical axis direction X, thereby more effectively adjusting the focal length of the zoom lens group 23 and the focus lens group 33; compared with the use of optical coupling sensing technology to determine the zoom As for the position of the lens group 23 or the focusing lens group 33 relative to the fixed lens barrel 1, there is no need to return the gear to the position of the starting optical coupler every time. The real-time position of the zoom lens group 23 and the focusing lens group 33 relative to the fixed lens barrel 1 can be obtained in real time, which is beneficial to reducing the working time during zooming and focusing, and is beneficial to improving the working efficiency of automatic zooming and focusing; when the above-mentioned automatic zooming and focusing device 100 is applied to the projection device 900, it is beneficial to improve the working efficiency of the projection device 900 during automatic zooming and focusing, thereby facilitating the realization of the automatic zooming and focusing function of the projection device 900, and is beneficial to improving the user experience.

[0111] Please also refer to Figure 1 and Figure 5 The projection device 900 of the embodiment of the present application includes an optical machine housing 901 and an automatic zoom and focus adjustment device 100 as in any of the above embodiments, and the automatic zoom and focus adjustment device 100 is installed on the optical machine housing 901.

[0112] The projection device 900 can be an electronic device with a projection function, such as a projector or an overhead projector. The projection device 900 can also include a control module 903 and a power module 905 electrically connected to the automatic zoom and focus adjustment device 100 and the optical machine housing 901. The power module 905 provides electrical energy for the automatic zoom and focus adjustment device 100, the optical machine housing 901, and the control module to operate. The control module 903 can intelligently control the automatic zoom and focus adjustment device 100 to adjust the focus. The control module 903 of the projection device 900 can also include a main control circuit board (not shown). The circuit board (not shown) of the automatic zoom and focus adjustment device 100 can serve as the main control circuit board or as an auxiliary circuit board electrically connected to the main control circuit board.

[0113] The projection device 900 provided in the embodiment of the present application is provided with the automatic zoom and focus device 100 of any of the above embodiments, wherein the position detection module 5 obtains the real-time position of the zoom lens group 23 relative to the fixed lens barrel 1 and the real-time position of the focus lens group 33 relative to the fixed lens barrel 1, and then the driving module 7 is provided to drive the zoom ring 21 and the focus ring 31 to rotate according to the real-time position of the zoom lens group 23 and the focus lens group 33 relative to the fixed lens barrel 1, so as to drive the zoom lens group 23 and the focus lens group 33 to move relative to the fixed lens barrel 1 in the optical axis direction X, thereby more effectively adjusting the zoom lens group 23 and the focus lens group 33. The focal length of the focusing lens group 23 and the focusing lens group 33; compared with the use of optical coupling sensing technology to determine the position of the zoom lens group 23 or the focusing lens group 33 relative to the fixed lens barrel 1, there is no need to return the gear to the starting optical coupling position every time, and the real-time position of the zoom lens group 23 and the focusing lens group 33 relative to the fixed lens barrel 1 can be obtained in real time, which is beneficial to reducing the working time during zooming and focusing, and is beneficial to improving the working efficiency of the projection device 900 during automatic zooming and focusing, thereby facilitating the realization of the automatic zooming and focusing function of the projection device 900, and is beneficial to improving the user experience.

[0114] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An automatic zoom and focus device, characterized in that: include: Fixed lens barrel; A zoom module, comprising a zoom ring and a zoom lens group transmission-connected to the zoom ring, wherein the zoom ring is rotatably connected to the fixed lens barrel in a radial direction of the optical axis; A focusing module, comprising a focusing ring and a focusing lens group drivingly connected to the focusing ring, wherein the focusing ring is rotatably connected to the fixed lens barrel in a radial direction of the optical axis; A position detection module, comprising a zoom distance detection module and a focus distance detection module, wherein the zoom distance detection module is used to obtain the real-time position of the zoom lens group relative to the fixed lens barrel; the focus distance detection module is used to obtain the real-time position of the focus lens group relative to the fixed lens barrel; as well as A driving module is used to drive the zoom ring and the focusing ring to rotate according to the real-time positions of the zoom lens group and the focusing lens group relative to the fixed lens barrel, so as to drive the zoom lens group and the focusing lens group to move relative to the fixed lens barrel in the direction of the optical axis.

2. The automatic zoom and focus device according to claim 1, characterized in that: The zoom distance detection module includes a first magnetic member and a first magnetic sensor, one of which is disposed on the zoom lens assembly, and the other is fixed relative to the fixed lens barrel, and the first magnetic sensor is used to detect a magnetic signal of the first magnetic member in real time to obtain a real-time position of the zoom lens assembly relative to the fixed lens barrel; The focusing distance detection module includes a second magnetic member and a second magnetic sensor. One of the second magnetic member and the second magnetic sensor is arranged on the focusing lens group, and the other is fixed relative to the fixed lens barrel. The second magnetic sensor is used to detect the magnetic signal of the second magnetic member in real time to obtain the real-time position of the focusing lens group relative to the fixed lens barrel.

3. The automatic zoom and focus device according to claim 2, characterized in that: The fixed lens barrel includes a barrel and a fixing plate arranged in the radial direction of the barrel; The first magnetic member is disposed on the zoom lens assembly, and the first magnetic sensor is disposed on the fixing plate and fixed relative to the fixing lens barrel.

4. The automatic zoom and focus device according to claim 2, characterized in that: The fixed lens barrel includes a barrel and a fixing plate arranged in the radial direction of the barrel; The second magnetic member is disposed on the focusing lens assembly, and the second magnetic sensor is disposed on the fixing plate and fixed relative to the fixing lens barrel.

5. The automatic zoom and focus device according to claim 2, characterized in that: The driving module includes a zoom driving module and a focus adjusting driving module; The zoom drive module is used to drive the zoom ring to rotate, and the zoom ring rotates around the optical axis while driving the zoom module to move relative to the fixed lens barrel in the direction of the optical axis; the focus drive module is used to drive the focus ring to rotate, and the focus ring rotates around the optical axis while driving the focus module to move relative to the fixed lens barrel in the direction of the optical axis.

6. The automatic zoom and focus device according to claim 5, characterized in that: The zoom driving module includes a first motor, a first zoom transmission member and a second zoom transmission member; the first zoom transmission member is connected to the driving end of the first motor, the second zoom transmission member is connected to the zoom ring, and the second zoom transmission member and the first zoom transmission member are engaged for transmission.

7. The automatic zoom and focus device according to claim 6, characterized in that: The zoom ring includes a first sleeve ring and at least one first fixing hole formed on the first sleeve ring; the fixed lens barrel is further provided with a first limiting hole extending therethrough; The zoom lens assembly includes a first transmission barrel and at least one first zoom transmission rod fixedly connected to the first transmission barrel. At least one zoom lens is fixed to the first transmission barrel. One end of the first zoom transmission rod is fixedly connected to the first transmission barrel, and the other end passes through the first limiting hole and is fixed in the first fixing hole. The first limiting hole is inclined relative to the circumferential direction of the fixed lens barrel, and the first limiting hole and the first zoom transmission rod are limitedly engaged. When the second zoom transmission member and the first zoom transmission member are engaged for transmission, the zoom ring rotates around the optical axis and drives the first zoom transmission rod to move relative to the fixed lens barrel in the direction of the optical axis.

8. The automatic zoom and focus device according to claim 6, characterized in that: The first zoom transmission member is a transmission gear, the second zoom transmission member is a transmission rack, and the first motor is used to adjust the rotation direction and rotation angle of the first zoom transmission member according to the magnetic signal detected by the first magnetic sensor, so as to adjust the movement distance of the zoom module relative to the fixed lens barrel in the direction of the optical axis.

9. The automatic zoom and focus device according to claim 5, characterized in that: The focusing drive module includes a second motor, a first focusing transmission member and a second focusing transmission member, the first focusing transmission member is connected to the driving end of the second motor, the second focusing transmission member is connected to the focusing ring, and the first focusing transmission member and the second focusing transmission member are engaged for transmission.

10. The automatic zoom and focus device according to claim 9, characterized in that: The focusing ring includes a second sleeve ring and at least one second limiting hole formed on the second sleeve ring; The focusing lens assembly includes a second transmission cylinder and at least one first focusing transmission rod fixedly connected to the second transmission cylinder, the second transmission cylinder is fixed with at least one focusing lens, the first focusing transmission rod is partially embedded in the second limiting hole, the second limiting hole is limitedly engaged with the first focusing transmission rod, and the second limiting hole is inclined relative to the circumferential direction of the second ring; When the first focusing transmission member and the second focusing transmission member are engaged for transmission, the focusing ring rotates around the optical axis and drives the first focusing transmission rod to move relative to the fixed lens barrel in the direction of the optical axis.

11. The automatic zoom and focus device according to claim 9, characterized in that: The first focusing transmission member is a transmission gear, the second focusing transmission member is a transmission rack, and the second motor is used to adjust the rotation direction and rotation angle of the first focusing transmission member according to the magnetic signal detected by the second magnetic sensor, so as to adjust the movement distance of the focusing ring relative to the fixed lens barrel in the direction of the optical axis.

12. A projection device, characterized in that: include: Optical machine housing; as well as The automatic zoom and focus adjustment device according to any one of claims 1 to 11, wherein the automatic zoom and focus adjustment device is mounted on the optical machine housing.

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