CN114967029A - Projection lens, projection ray apparatus and virtual reality equipment - Google Patents
Projection lens, projection ray apparatus and virtual reality equipment Download PDFInfo
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- CN114967029A CN114967029A CN202210479196.1A CN202210479196A CN114967029A CN 114967029 A CN114967029 A CN 114967029A CN 202210479196 A CN202210479196 A CN 202210479196A CN 114967029 A CN114967029 A CN 114967029A
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- lens barrel
- lead screw
- projection
- projection lens
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 7
- 239000011521 glass Substances 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 13
- 230000000007 visual effect Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 238000013016 damping Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000004438 eyesight Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
Abstract
The embodiment of the disclosure discloses a projection lens, a projection optical machine and virtual reality equipment, wherein the projection lens comprises a lens barrel, a sliding groove is arranged on the side wall of the lens barrel in a penetrating way, and the sliding groove extends along the axial direction of the lens barrel; the lens assembly is arranged in the lens barrel; the adjusting device is positioned outside the lens barrel and comprises a lead screw and a sliding block sleeved on the lead screw, the sliding block is in threaded fit with the lead screw, the sliding block is connected with the lens assembly through a connecting rod, and the connecting rod can move along the sliding groove; when the lead screw rotates, the lens assembly can be driven to move along the axial direction of the lens barrel.
Description
Technical Field
The disclosure relates to the technical field of optical electronic products and optical machine structures, in particular to a projection lens, a projection optical machine and virtual reality equipment.
Background
DLP light projectors are new types of projection devices that have been rapidly developed in recent years, and can be applied to devices such as virtual reality devices (VR devices). With the vigorous development of VR technology, users have increasingly high demands on the visual effect of VR devices. However, the user's eyesight has individual differences. When each user uses a VR product, the imaging definition of the picture is different along with the difference of the eyesight of the user, and the imaging definition is different, so that the use experience of the user is reduced.
Disclosure of Invention
An object of the present disclosure is to provide a new technical solution for a projection lens, a projection ray machine and a virtual reality device.
In a first aspect, in one embodiment of the present disclosure, a projection lens is provided. The projection lens includes:
the side wall of the lens barrel is provided with a sliding chute in a penetrating way, and the sliding chute extends along the axial direction of the lens barrel; the lens assembly is arranged in the lens barrel; the adjusting device is positioned outside the lens barrel and comprises a lead screw and a sliding block sleeved on the lead screw, the sliding block is in threaded fit with the lead screw, the sliding block is connected with the lens assembly through a connecting rod, and the connecting rod can move along the sliding groove; when the lead screw rotates, the lens assembly can be driven to move along the axial direction of the lens barrel. Optionally, the adjusting device is located outside the lens barrel, and the adjusting device includes a lead screw and a transmission portion, and the lead screw is connected with the lens support through the transmission portion; when the lead screw rotates, the transmission part can drive the lens support to move.
Optionally, a first limiting structure is disposed on a surface of the slider facing the lens barrel, the connecting rod is connected with the first limiting structure in a matching manner, and the first limiting structure at least limits the connecting rod along an axial direction of the lens barrel.
Optionally, the lens assembly includes a lens support and a lens body, the lens body is fixed in the lens support, a mounting structure is arranged on the lens support, and the connecting rod is connected with the mounting structure.
Optionally, the screw driver further comprises a fixed support, and a track groove extending in the same direction as the screw is formed in the fixed support; the tail end of the sliding block is located in the track groove, and the track groove limits the sliding block along the direction perpendicular to the central axis of the lead screw.
Optionally, a second limiting structure matched with the lead screw is arranged at the end of the fixing support, and the end of the lead screw is located in the second limiting structure.
Optionally, the device further comprises a roller, the roller is connected with the screw rod, the roller is located between the fixed support and the sliding block, and the roller can drive the screw rod to rotate.
Optionally, a guide groove is further disposed on an inner wall of the lens barrel, and the guide groove extends in an axial direction of the lens barrel.
Optionally, a guide pin matched with the guide groove is arranged on the lens assembly, and the guide pin can slide along the guide groove.
Optionally, a stop ring is disposed at an opening of the front end of the lens barrel, the stop ring is connected to an inner wall of the lens barrel, and an inner diameter of the stop ring is smaller than an inner diameter of the lens assembly.
In a second aspect, the present application provides a projection light engine. The optical projection machine comprises the projection lens.
In a third aspect, the present application provides a virtual reality device. The virtual reality device comprises the projection lens.
The beneficial effects of the embodiment of the application are that:
the adjusting device is fixed on the lens cone, and the lens bracket and the lens body fixed with the lens bracket can be driven by the adjusting device to reciprocate along the axial direction of the lens cone in a thread transmission mode, so that the diopter of the projection lens is changed. The diopter of the projection lens can be adjusted according to the visual needs of the user under different visual conditions, so that the projection lens can be matched with the visual conditions of the user, and the use experience of the user is increased.
Other features of the present description and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description, serve to explain the principles of the specification.
Fig. 1 is a schematic structural diagram of a part of a projection lens in an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of a projection lens in an embodiment of the disclosure;
FIG. 3 is a side view of a lens holder of a projection lens in an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a fixing bracket of a projection lens in an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a lens barrel of a projection lens in an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a slider of a projection lens in an embodiment of the present disclosure.
Description of reference numerals:
10. a lens barrel; 11. a guide groove; 12. a chute; 13. a stop ring; 131. avoiding holes; 14. a slide rail; 20. a lens holder; 21. a mounting structure; 22. a guide pin; 23. a supporting seat; 24. a lens body; 30. an adjustment device; 31. a lead screw; 32. a slider; 321. a first limit structure; 322. an extension portion; 33. a connecting rod; 331. a top portion; 332. a middle part; 333. a bottom; 334. a first step surface; 335. a second step surface; 40. fixing a bracket; 41. a first support bar; 411. a second limit structure; 42. a second support bar; 421. a track groove.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The features of the terms first and second in the description and in the claims of the present disclosure may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specified.
In the description of the present disclosure, it is to be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing and simplifying the disclosure, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the disclosure.
In the description of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
According to one embodiment of the present disclosure, a projection lens is provided. The projection lens in this embodiment includes: the lens barrel comprises a lens barrel 10, wherein a stop ring is arranged on the side wall of the lens barrel 10 in a penetrating manner, and a sliding groove 12 extends along the axial direction of the lens barrel 10;
a lens assembly disposed in the lens barrel 10; and
the adjusting device 30 is positioned outside the lens barrel 10, the adjusting device 30 comprises a lead screw 31 and a slide block 32 sleeved on the lead screw 31, the slide block 32 is in threaded fit with the lead screw 31, the slide block 32 is connected with the lens assembly through a connecting rod 33, and the connecting rod 33 can move along the sliding groove 12;
when the lead screw 31 rotates, the lens assembly can be driven to move along the axial direction of the lens barrel 10.
As shown in fig. 1-6, the lens assembly includes a lens holder 20 and a lens body 24. The lens body 24 is secured within the lens holder 20. A lens holder 20 is sleeved in the lens barrel 10, and the lens holder 20 is used for fixing a lens body 24. An adjusting device 30 connected to the lens barrel 10 and the lens holder 20, respectively, the adjusting device 30 being configured to drive the lens holder 20 to reciprocate in an axial direction of the lens barrel 10 by means of a screw drive.
As shown in fig. 1-6, the projection lens in the present disclosure may be installed in a virtual reality device. For example, the projection lens may be mounted in vr (visual reality) glasses. VR glasses refer to virtual reality head mounted display devices. The lens barrel 10 is a supporting part that supports the lens holder 20 and the adjusting device 30. The lens barrel 10 can be fixed on the VR glasses by screw locking. And can be fixed by other means, and can be selected by the skilled person.
As shown in fig. 1 or fig. 2, the lens holder 20 is located inside the lens barrel 10, and an outer wall of the lens holder 20 is slidably connected to an inner wall of the lens barrel 10. The lens holder 20 is a support part for the lens body 24 and the adjustment device 30. The lens body 24 is fixedly connected to the lens holder 20. When the lens holder 20 slides in the lens barrel 10, the lens body 24 can be driven to move in the lens barrel 10 along the axial direction of the lens barrel 10.
As shown in fig. 1 or fig. 2, the adjusting device 30 can move relative to the lens barrel 10, so that the lens holder 20 is moved along the set track of the adjusting device 30 by the adjusting device 30. The lens body 24 moves with the lens holder 20. The adjusting means 30 is a screw transmission device capable of converting a rotational motion into a linear motion, thereby pushing the lens holder 20 to perform the linear motion.
In this way, the diopter of the VR glasses can be changed by changing the distance between the lens body 24 and the user glasses. The diopter of the projection lens can be adjusted according to the visual needs of the user under different visual conditions, so that the projection lens can be matched with the visual conditions of the user, and the use experience of the user is increased.
In addition, the adjusting device 30 in the present disclosure is directly disposed above the lens barrel 10, and the distance from the lens body 24 is short, so that the advance or retreat of the lens body 24 can be controlled at a short distance, thereby adjusting the diopter of the VR glasses. The size of the glasses can be further reduced, and the weight of the glasses is reduced.
For example, when the screw 31 is rotated, the link 33 can move along the axial direction of the screw 31 to drive the lens holder 20 to move.
As shown in fig. 1 to 6, the screw 31 is rotated by an external force. The screw 31 is sleeved with a slide block 32, and the slide block 32 and the screw 31 form a threaded fit. The lead screw 31 extends in the axial direction of the lens barrel 10. The lens holder 20 is disposed coaxially with the lens barrel 10. The lead screw 31 extends in the axial direction of the lens holder 20.
As shown in fig. 1 or fig. 2, the adjusting device 30 is located outside the lens barrel 10, and a part of the link 33 passes through the lens barrel 10 and is connected to the lens body 24. The connecting rod 33 can move relative to the lead screw 31, so as to drive the lens body 24 connected with the connecting rod to move. The lens body 24, the lens barrel 10 and the lens holder 20 are coaxially disposed. When the lens body 24 moves along the axial direction of the lens barrel 10, the distance between the lens body 24 and the eyes of the user changes, thereby changing the diopter of the projection lens.
In this way, the adjusting device 30 does not occupy the light-passing area inside the lens barrel 10, increasing the area of the light-passing area. Moreover, the adjusting device 30 in the present disclosure has a simple structure, thereby reducing the assembly difficulty of the existing VR glasses and reducing the manufacturing cost of the VR glasses. Simultaneously, through the screw drive, can realize more accurate guiding orientation and more accurate step distance to the reliability of the focusing of VR glasses has been improved.
As shown in fig. 1, 2 and 5, a slide groove 12 matching with the moving track of the link 33 is provided on the lens barrel 10, and the link 33 passes through the slide groove 12 and is connected with the lens holder 20. A slide groove 12 is provided on a side wall of the lens barrel 10, and the slide groove 12 allows the link 33 to pass therethrough. The middle portion 332 of the link 33 is located in the slide channel 12 in a clearance fit with the slide channel 12.
The inner diameter of the slide groove 12 matches the diameter width of the transmission part 32 of the connecting rod 33. The slide groove 12 extends in the axial direction of the lens barrel 10. The length of the sliding groove 12 is the same as the length of the displacement track of the lens body 24 of the lens assembly in the lens barrel 10.
In this way, the inner wall of the sliding groove 12 forms a limit to the side wall of the connecting rod 33, thereby preventing the connecting rod 33 from driving the lens holder 20 to rotate along the axial direction of the lens barrel 10.
In one example, a stop ring 13 is disposed at the mouth of the front end of the lens barrel 10, the stop ring 13 is connected to the inner wall of the lens barrel 10, and the inner diameter of the stop ring 13 is smaller than that of the lens assembly.
In this way, the stop ring 13 forms a stop for the lens holder 20. The lens holder 20 can be prevented from falling off from the lens barrel 10 in the moving process, and the connection strength of the projection lens is increased.
In an embodiment of the present disclosure, a first limiting structure 321 is disposed on a surface of the slider 32 facing the lens barrel 10, the link 33 is in fit connection with the first limiting structure 321, and the first limiting structure 321 limits the link 33 at least along an axial direction of the lens barrel 10.
As shown in fig. 1, 2 and 6, the slider 32 extends in a direction perpendicular to the lead screw 31, that is, the slider 32 extends in a radial direction of the lens barrel 10. The slider 32 is capable of linear movement in the extending direction of the lead screw 31, that is, in the axial direction of the lens barrel 10. A first stopper 321 is provided on a surface of the slider 32 facing the lens barrel 10. The first limiting structure 321 may be a limiting hole or a limiting groove. The upper end of the link 33 is located within the first stop structure 321. The first limiting structure 321 limits the connecting rod 33 at least along the moving direction of the lens support 20, and the extending direction of the lead screw 31 matches with the motion track of the lens support 20.
In this way, through the cooperation between the screw rod 31, the slider 32 and the connecting rod 33, the lens holder 20 can be driven to move along the axial direction of the lens barrel 10 through the slider 32 and the connecting rod 33 through the thread transmission, thereby realizing the diopter adjustment. The projection lens is simple, and the diopter adjustment reliability is improved.
In one example of the present disclosure, the lens assembly includes a lens holder 20 and a lens body 24, the lens body 24 is fixed in the lens holder 20, a mounting structure 21 is disposed on the lens holder 20, and a connecting rod 33 is connected to the mounting structure 21.
The link 33 is detachably connected to the lens holder 20. For example, as shown in FIG. 2, the link 33 is threadedly connected to the lens holder 20. The connecting rod 33 passes through the lens barrel 10 and is connected with the lens holder 20 through a connecting device. Corresponding mounting structures 21 are provided on the fixing bracket, and the mounting structures 21 may be mounting grooves or mounting holes, for example. A female screw structure is provided in the mounting structure 21, and a male screw structure is provided on the outer wall of the link 33 corresponding to the screw structure in the mounting structure 21.
As shown in fig. 2, the link 33 has a stepped structure, and the inner diameter of the link 33 decreases from the top end of the link 33 toward the bottom end of the link 33. The link 33 has a first step surface 334 and a second step surface 335, the first step surface 334 and the second step surface 335 dividing the link 33 into a top portion 331, a middle portion 332, and a bottom portion 33. The top 331 is located at the top end of the link 33 and the bottom 33 is located at the bottom end of the link 33. The middle portion 332 forms a clearance fit with the barrel 10. The bottom portion 33 extends into the mounting structure 21 and the top portion 331 is located in the first limiting structure 321, the first limiting structure 321 being located opposite the mounting structure 21. The second step surface 335 forms a stop with the lens holder 20 such that the bottom 33 of the link 33 is spaced from the bottom surface of the mounting structure 21. The first step surface 334 forms a stopper with the surface of the lens barrel 10. The inner diameter of first step surface 334 is greater than the inner diameter of second step surface 335.
By the mode, the stress of the connecting rod 33 can be more uniform, and the diopter adjustment stability is improved.
In one example, as shown in FIG. 2, the top 331, middle 332, and bottom 33 portions of the linkage 33 are all cylindrical. The top 331, middle 332 and bottom 33 portions of the link 33 are coaxially disposed. In this way, the structural strength of the link 33 can be increased, further improving the stability of diopter adjustment.
In one embodiment of the present disclosure, the projection lens further includes a fixing bracket 40, and a rail groove 421 extending in the same direction as the lead screw 31 is disposed on the fixing bracket 40;
the end of the sliding block 32 is located in the track groove 421, and the track groove 421 at least limits the sliding block 32 along a direction perpendicular to the central axis of the screw 31.
As shown in fig. 1, 2, 4 and 6, the fixing bracket 40 is a support member for supporting the screw 31 and the slider 32. The fixing bracket 40 may be fixedly connected to the lens barrel 10 or other structures in the VR glasses, so as to provide support for the lead screw 31 and the slider 32. The slider 32 includes a body portion and an extension portion 322, the body portion is sleeved on the lead screw 31 and forms a coupling with the lead screw 31. The extension 322 extends from the body in a direction toward the fixing bracket 40. The first limiting structure 321 for limiting the connecting rod 33 is located on the main body or on the extending portion 322. Subject to the needs of those skilled in the art in designing structures.
As shown in fig. 4, the fixing bracket 40 has an L-shaped structure, the fixing bracket 40 includes a first supporting rod 41 and a second supporting rod 42, the first supporting rod 41 is connected to the screw rod 31 at the beginning, and the second supporting rod 42 is fixed to the end of the first supporting rod 41. The first support bar 41 extends in the second direction, and is the same as the extension direction of the extension portion 322 of the slider 32. The second support bar 42 extends in the first direction, the second support bar 42 is disposed in parallel with the screw rod 31, and the second support bar 42 extends in the same direction as the screw rod 31. The first support bar 41 and the second support bar 42 are perpendicular to each other.
As shown in fig. 1, 2, 4 and 6, the second support bar 42 is disposed opposite to the extension portion 322 of the slider 32, and the second support bar 42 is provided with a track groove 421. The rail groove 421 is a straight groove body. The track groove 421 coincides with the extending direction of the second support bar 42 and the lead screw 31. For example, the track groove 421 is formed by the opposite surface of the extension 322 of the second support bar 42 being recessed toward a direction away from the extension 322. The extension 322 of the slider 32 is at least partially located in the track groove 421. The side wall of the track groove 421 forms a limit along the axial direction of the lens barrel 10 to prevent the slider 32 from rotating along with the rotation of the screw 31.
In this way, the slider 32 can be linearly moved in the axial direction of the lens barrel 10, and rotation can be converted into linear movement.
As shown in fig. 4, the cross section of the rail groove 421 is a convex shape, and the projection range of the mouth of the rail groove 421 is located within the range of the bottom surface of the rail groove 421. Correspondingly, the end of the extension portion 322 located inside the rail groove 421 forms a limit fit with the rail groove 421.
In this way, the slider 32 is limited, and the connection strength between the slider 32 and the track groove 421 is increased.
In an example of the present disclosure, a second limit structure 411 matched with the lead screw 31 is disposed at an end of the fixing bracket 40, and an end of the lead screw 31 is located in the second limit structure 411.
As shown in fig. 4, a second stopper 411 is provided at the start end of the first support rod 41. The second position-limiting structure 411 may be a position-limiting hole or a position-limiting groove. The end of the screw 31 is located in the second limiting structure 411, and the screw 31 can rotate relative to the second limiting structure 411. The second limiting structure 411 limits one end of the screw 31, so as to avoid the situation that the screw 31 throws when driving the slider 32.
In this way, the stability of the diopter adjustment can be further increased.
In an embodiment of the present disclosure, the projection lens further includes a roller, the roller is connected to the lead screw 31, the roller is located between the fixing bracket 40 and the sliding block 32, and the roller can drive the lead screw 31 to rotate.
For example, as shown in fig. 1, the lead screw 31 may be driven electrically or manually. The end of the screw 31 is connected with a driving shaft of a motor, or the end of the screw 31 is provided with a roller, and the end of the screw 31 is positioned at the center of the roller. The roller can rotate around the end of the lead screw 31. The roller is pulled by hand, so that the screw rod 31 is driven to rotate, and the lens support 20 can perform linear movement in the axial direction of the lens barrel 10.
In this way, the user can drive the roller to rotate by hand, and the roller drives the lead screw 31 to rotate. In this way, the user can directly adjust the diopter of the projection lens by hand.
In an example of the present disclosure, a guide groove 11 is further provided on an inner wall of the lens barrel 10, and the guide groove 11 extends in an axial direction of the lens barrel 10.
As shown in fig. 4 and 5, the guide groove 11 is formed by an inner wall of the lens barrel 10 being recessed toward the outside. The length of the guide groove 11 matches the length of the movement locus of the lens holder 20. For example, the guide groove 11 is disposed opposite to the mounting structure 21 of the lens holder 20 for defining the position of the slider 32. When the mounting structure 21 is located at the top 331 of the projection lens, the guide groove 11 is located at the bottom 33 of the projection lens. The lens holder 20 forms a sliding fit with the guide groove 11, and the lens holder 20 moves in the extending direction of the guide groove 11. The length of the guide groove 11 is greater than or equal to the length of the slide groove 12 on the lens barrel 10.
In this way, the lens holder can move linearly along the axial direction of the lens barrel 10, thereby preventing the lens holder from rotating or shifting, and preventing the imaging picture from being distorted.
In one example, the guide groove 11 may be plural, and adjacent guide grooves 11 are provided at intervals. The guide grooves 11 extend in the same direction. For example, two parallel guide grooves 11 are provided on the lens barrel 10, and the lens holders 20 are respectively in fit connection with the guide grooves 11.
In this way, the stress of the lens support 20 can be more balanced, so that the stability and stability of the adjusting diopter are improved.
In one embodiment of the present disclosure, a guide pin 22 is provided on the lens assembly to match the guide groove 11, and the guide pin 22 can slide along the guide groove 11.
As shown in fig. 1-6, when the lens holder 20 is driven to move by the guiding pin 22 cooperating with the guiding groove 11, the lens holder 20 can only move linearly along the axial direction of the lens barrel 10, that is, the lens holder 20 has only a single movement tendency. Meanwhile, the guide pin 22 on the lens support 20 is matched with the guide groove 11, so that the stress of the lens support 20 during movement is more balanced, and the stability and reliability of diopter adjustment are further improved.
In one example, as shown in FIG. 3, the width of the guide pin 22 is greater than the thickness of the lens holder 20. As shown in fig. 6, the stopper ring 13 is provided with a relief hole 131, and the guide groove 11 penetrates the lens barrel 10 in the thickness direction of the lens barrel 10. The guide groove 11 communicates with the escape hole 131. When the lens holder 20 moves forward after the guide pin 22 of the lens holder 20 is fitted into the guide groove 11, the guide pin 22 moves along the guide groove 11. When the guide pin 22 is stopped to the stopper ring 13, the guide pin 22 is located in the escape hole 131.
In this way, when the width of the guide pin 22 is greater than the thickness of the lens holder 20, the movement stability of the lens holder 20 can be increased.
In one example, as shown in fig. 2, the guide pin 22 is located opposite the adjustment device 30 of the lens holder 20, and the width of the guide pin 22 is greater than the width of the lens holder 20. The mounting structure 21 is located on the guide pin 22 and the link 33 forms a connection with the mounting structure 21. Thus, the connecting area of the connecting rod 33 and the lens support 20 is increased, the stress area of the lens support 20 is increased, and the structural strength of the lens support 20 is improved.
In one example, as shown in fig. 3, a support base 23 is provided on the lens holder 20 at a position opposite to the mounting structure 21, and the support base 23 is used to connect with the lens barrel 10, thereby supporting the lens holder 20. The support base 23 extends from the side wall portion of the lens holder 20 toward the mouth of the distal end of the lens barrel 10. The inner wall of the lens barrel 10 is provided with a slide rail 14 matched with the support base 23. The supporting seat 23 is connected to the slide rail 14 in a matching manner, and when the lens holder 20 moves relative to the lens barrel 10, the supporting seat 23 can move along the slide rail 14.
Thus, the structural strength of the lens holder 20 can be further increased, and the lens holder 20 is restricted. Further avoiding the lens holder 20 from shifting during the movement.
In one embodiment of the present disclosure, the projection lens further includes a damping structure disposed around an inner wall of the lens barrel 10, the damping structure being configured to cover a range of axial movement of the lens holder 20.
For example, the damping structure is a rubber ring. The damping structure is located between the inner wall of the lens barrel 10 and the outer wall of the lens holder 20. The damping structure provides a damping effect when the lenses are moved in the axial direction of the lens barrel 10. Through the mode, when the projection lens is adjusted to be in diopter, the projection lens has a damping effect, and therefore the problem of blockage of focusing is avoided.
According to yet another embodiment of the present application, a projection engine is provided. The projection optical machine comprises the projection lens.
The projection optical system further includes a housing and the like, and the projection lens is provided on the housing, for example.
According to an embodiment of the present disclosure, there is also provided a virtual reality device. The virtual reality device comprises the projection lens.
For example, the virtual reality device is VR glasses, and the VR glasses include a body portion and the projection lens. The number of the projection lenses is two, and the two projection lenses are oppositely arranged. In actual use, light from the light source passes through the projection lens and is projected onto the user's eyes to form an image. The user can adjust the relative position of the lens body 24 and the eyes by driving the lead screw 31, thereby adjusting the diopter of the lens assembly.
By the mode, the situation that clear pictures cannot be obtained due to different vision conditions of different users is avoided. Different users can adjust diopter according to own vision conditions to obtain the best visual effect.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present disclosure have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A projection lens, comprising:
the side wall of the lens barrel is provided with a sliding chute in a penetrating way, and the sliding chute extends along the axial direction of the lens barrel;
the lens assembly is arranged in the lens barrel; and
the adjusting device is positioned outside the lens barrel and comprises a lead screw and a sliding block sleeved on the lead screw, the sliding block is in threaded fit with the lead screw, the sliding block is connected with the lens assembly through a connecting rod, and the connecting rod can move along the sliding groove;
when the lead screw rotates, the lens assembly can be driven to move along the axial direction of the lens barrel.
2. The projection lens of claim 1, wherein a first limiting structure is disposed on a surface of the slider facing the lens barrel, the connecting rod is connected with the first limiting structure in a matching manner, and the first limiting structure limits the connecting rod at least along an axial direction of the lens barrel.
3. The projection lens of claim 1 wherein the lens assembly comprises a lens holder and a lens body, the lens body is fixed in the lens holder, a mounting structure is disposed on the lens holder, and the connecting rod is connected to the mounting structure.
4. The projection lens of claim 1, further comprising a fixed bracket, wherein the fixed bracket is provided with a track groove extending in the same direction as the lead screw;
the tail end of the sliding block is located in the track groove, and the track groove limits the sliding block along the direction perpendicular to the central axis of the lead screw.
5. The projection lens as claimed in claim 4, wherein a second limit structure matched with the lead screw is arranged at the end of the fixed support, and the end of the lead screw is located in the second limit structure.
6. The projection lens of claim 5, further comprising a roller, wherein the roller is connected to the lead screw, the roller is located between the fixed bracket and the slider, and the roller can drive the lead screw to rotate.
7. The projection lens according to claim 1, wherein a guide groove is further provided on an inner wall of the lens barrel, and the guide groove extends in an axial direction of the lens barrel.
8. The projection lens of claim 7 wherein a guide pin matching the guide groove is provided on the lens assembly, the guide pin being slidable along the guide groove.
9. The projection lens of any one of claims 1 to 8, wherein a stop ring is disposed at the mouth of the front end of the lens barrel, the stop ring is connected to the inner wall of the lens barrel, and the inner diameter of the stop ring is smaller than the inner diameter of the lens assembly.
10. A projection light engine comprising the projection lens according to any one of claims 1 to 9.
11. A virtual reality device comprising the projection lens of any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479196.1A CN114967029A (en) | 2022-04-22 | 2022-04-22 | Projection lens, projection ray apparatus and virtual reality equipment |
| PCT/CN2022/100947 WO2023201875A1 (en) | 2022-04-22 | 2022-06-24 | Projection lens, projection optical machine and virtual reality device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479196.1A CN114967029A (en) | 2022-04-22 | 2022-04-22 | Projection lens, projection ray apparatus and virtual reality equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114967029A true CN114967029A (en) | 2022-08-30 |
Family
ID=82980116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210479196.1A Pending CN114967029A (en) | 2022-04-22 | 2022-04-22 | Projection lens, projection ray apparatus and virtual reality equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114967029A (en) |
| WO (1) | WO2023201875A1 (en) |
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| WO2023201875A1 (en) | 2023-10-26 |
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