AR lens back focus debugging jig

Abstract

The utility model provides an AR lens back focus debugging jig. The AR lens back focus debugging jig comprises a bottom plate, a fixing seat arranged on the bottom plate, a positioning piece arranged on the fixing seat and used for fixing a lens, and a lifting mechanism arranged on the bottom plate and used for driving a display screen and a driving plate to move up and down. The driving assembly drives the top plate to move upwards, the top plate drives the sliding plate, the supporting plate and the locking assembly to move upwards, when the driving assembly is reset, the spring is reset, the sliding plate is driven to move downwards by the reset of the spring, the top plate drives the top plate to move downwards, and the top plate drives the supporting plate and the locking assembly to move downwards. Therefore, the supporting plate drives the soft plate and the driving plate on the supporting plate to move up and down, and the locking assembly drives the display screen to move up and down, so that the distance between the display screen and the lens is adjusted, the back focus distance of the lens is precisely adjusted to be 0.02 mm to determine the optimal imaging quality of the waveguide plate, and meanwhile, the debugging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lens debugging, and in particular to an AR lens back focus debugging jig. Background Art

[0002] Back focus debugging of AR lenses refers to the process of adjusting the distance between the lens and the imaging sensor to ensure that the image is clearly focused, which is crucial to ensuring the performance and user experience of AR devices.

[0003] During product production, the optical back focus of the AR lens and the micro display screen will have cumulative assembly errors during actual assembly. The back focus distance between the AR lens and the micro display screen will greatly affect the imaging quality of the waveguide. Too high or too low back focus will cause the image to be blurred and unclear. In the existing technology, adjustments are usually made directly by hand, but manual adjustments lead to large errors, inconvenience and low efficiency. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide an AR lens back focus debugging fixture.

[0005] The utility model provides the following technical solution: an AR lens back focus adjustment fixture, comprising a base plate, a fixing seat provided on the base plate, a positioning member provided on the fixing seat for fixing the lens, a lifting mechanism provided on the base plate for driving a display screen and a driving plate to move up and down, and a locking assembly provided on the lifting mechanism for supporting the display screen;

[0006] The positioning member includes a positioning block fixedly connected to the fixing seat, and a plurality of notches provided on the positioning block, wherein the lens is located in the notches;

[0007] The lifting mechanism includes a fixed base fixedly connected to the bottom plate, a sliding plate slidably connected to the fixed base, a top plate arranged on the sliding plate, a supporting plate arranged on the top plate for supporting the driving plate, and a driving component for driving the top plate to move.

[0008] Furthermore, the positioning member also includes a bolt, and the positioning block is fixedly connected to the fixing seat via the bolt.

[0009] Furthermore, the driving assembly in the lifting mechanism includes a threaded seat fixedly connected to the fixed base, a lifting knob threadedly connected to the threaded seat, a V-shaped swing rod rotatably connected to the fixed base, and a contact piece arranged on the lower side of the top plate, and the two sides of the swing rod are in contact with the lifting knob and the contact piece respectively.

[0010] Furthermore, the driving assembly further includes two balls arranged on one side of the swing rod close to the lifting knob and the contact member, respectively, and the two balls are in contact with the lifting knob and the contact member respectively.

[0011] Furthermore, the lifting mechanism also includes a locking assembly for fixing the sliding plate, the locking assembly includes a locking knob threadedly connected to the sliding plate, a guide plate fixedly connected to the fixed base, and a through hole opened on the guide plate, through which the locking knob passes through the through hole and is threadedly connected to the sliding plate.

[0012] Furthermore, the locking assembly includes a sliding member slidably connected to the base plate, a sliding groove opened through the sliding member, a bayonet opened on the side of the sliding member close to the positioning member, and a plurality of locking rotating members threadedly connected to the top plate, and the locking rotating members are threadedly connected to the top plate through the sliding groove.

[0013] The beneficial effects of this utility model are as follows: the top plate is driven to move upward by the driving assembly, and the top plate drives the sliding plate, the support plate and the locking assembly to move upward; when the driving assembly is reset, the spring will reset, and the spring reset drives the sliding plate to move downward, and the sliding plate drives the top plate to move downward, and the top plate drives the support plate and the locking assembly to move downward, thereby the support plate drives the soft plate and the driving plate thereon to move up and down, and the locking assembly drives the display screen to move up and down, thereby adjusting the distance between the display screen and the lens, and realizing the precise adjustment of the lens back focus distance "accuracy 0.02mm" to determine the best imaging quality of the waveguide plate, while improving the debugging efficiency; and through the four notches on the four sides of the positioning block and locked by bolts, the back focus of four lens products with different shapes can be adjusted, saving the cost of fixtures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the positioning member of the utility model.

[0016] Figure 3 It is a three-dimensional structural diagram of the lifting mechanism and locking assembly of the utility model.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the drive assembly of the utility model.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the driving assembly and the positioning member of the utility model.

[0019] The marks in the accompanying drawings are: 1-bracket, 2-base plate, 3-fixed seat, 4-positioning member, 41-positioning block, 42-bolt, 43-notch, 5-lifting mechanism, 51-fixed base, 52-sliding plate, 53-top plate, 54-support plate, 55-driving assembly, 551-threaded seat, 552-lifting knob, 553-swinging rod, 554-ball, 555-contact member, 56-guide plate, 57-through hole, 58-locking knob, 6-locking assembly, 61-sliding member, 62-bayonet, 63-slide groove, 64-locking rotating member, 7-waveguide, 8-lens, 9-display, 10-flexible board, 11-driving board. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] An AR lens back focus debugging fixture, such as Figure 1-Figure 3 and Figure 5As shown, it includes a base plate 2, a fixing seat 3 provided on the base plate 2, a positioning member 4 for fixing the lens 8 provided on the fixing seat 3, and a lifting mechanism 5 provided on the base plate 2 for driving the display screen 9 and the driving plate 11 to move up and down, and a locking assembly 6 provided on the lifting mechanism 5 for supporting the display screen 9; the positioning member 4 includes a positioning block 41 fixedly connected to the fixing seat 3, a plurality of notches 43 provided on the positioning block 41, and the lens 8 is located in the notches 43; the lifting mechanism 5 includes a fixed base 51 fixedly connected to the base plate 2, a sliding plate 52 slidably connected to the fixed base 51, a top plate 53 provided on the sliding plate 52, and a supporting plate 54 provided on the top plate 53 for supporting the driving plate 11, and a driving assembly 55 for driving the top plate 53 to move.

[0024] Among them, the entire AR lens 8 back focus debugging fixture can be set on the bracket 1 of the profile, and the base plate 2 is made of 10mm thick anti-static wooden board. Two through holes 57 with a diameter of 6.2mm are processed on the base plate 2 to fix it to the bracket 1 through bolts 42 or pins; two M5 threaded holes and four M4 threaded holes are processed on the base plate 2 to fix the fixing seat 3 and the fixing base 51 to the base respectively by screws. The positioning block 41 is square and has notches 43 on its sides. The shape of the notch 43 is designed into four different fixed notches 43 according to the appearance requirements of the product, so that different products can be positioned and tested through four different fixed notches 43; the positioning block 41 is fixedly connected to the fixing seat 3 by bolts 42.

[0025] It can be understood that when it is necessary to use the AR lens 8 back focus debugging fixture to debug the AR lens 8, the operator can first place the lens 8 and the waveguide plate 7 that need to be debugged into the notch 43 and the fixing seat 3 respectively for positioning, and the lower side of the AR lens 8 contacts the waveguide plate 7, and the waveguide plate 7 is partially positioned against the edge of the fixing seat 3. After the AR lens 8 and the waveguide plate 7 are placed stably, the operator can then install the display screen 9. The display screen 9 is located on the upper side of the AR lens 8. The locking component 6 can support the display screen 9 so that it is located on the upper side of the AR lens 8. The display screen 9 is connected to the driving board 11 through the soft board 10. The driving board 11 and the soft board 10 are located on the upper side of the support plate 54. After the display screen 9, the soft board 10 and the driving board 11 are placed, the operator can operate the driving component 55. The driving component 55 drives the top plate 53 to move upward, and the top plate 53 drives the sliding plate 52 and the support plate 54. The plate 54 and the locking assembly 6 move upward, and a spring (not seen in the figure) is provided between the sliding plate 52 and the fixed base 51. When the sliding plate 52 moves upward, the spring is stretched. When the driving assembly 55 is reset, the spring will reset. The spring reset drives the sliding plate 52 to move downward, and the sliding plate 52 drives the top plate 53 to move downward. The top plate 53 drives the support plate 54 and the locking assembly 6 to move downward, thereby the support plate 54 drives the soft plate 10 and the driving plate 11 thereon to move up and down, and the locking assembly 6 drives the display screen 9 to move up and down, thereby adjusting the distance between the display screen 9 and the lens 8, thereby achieving the effect of adjusting the back focus. When the operator adjusts the distance between the display screen 9 and the lens 8, he observes the imaging picture in the waveguide plate 7, adjusts it to the best imaging quality, and then fixes the lifting mechanism 5 to fix the existing back focus.

[0026] like Figure 4 As shown, the driving assembly 55 in the lifting mechanism 5 includes a threaded seat 551 fixedly connected to the fixed base 51, a lifting knob 552 threadedly connected to the threaded seat 551, a V-shaped swing rod 553 rotatably connected to the fixed base 51, and a contact piece 555 arranged on the lower side of the top plate 53, and the two sides of the swing rod 553 are in contact with the lifting knob 552 and the contact piece 555 respectively.

[0027] It can be understood that when the operator needs to operate the driving assembly 55 to move the top plate 53 upward, the operator can rotate the lifting knob 552, and the lifting knob 552 moves towards the square close to the swing rod 553, thereby pushing the swing rod 553 to rotate, and the swing rod 553 rotating pushes the contact piece 555 to move upward, and the contact piece 555 moving upward drives the top plate 53 to move upward; when the top plate 53 needs to move downward, the operator can rotate the lifting knob 552 in the opposite direction, and the lifting knob 552 will move away from the square close to the swing rod 553, at this time the spring will reset, and the spring drives the top plate 53 to move downward, in other embodiments, the spring can also not be provided, and the top plate 53 can move downward by its own gravity, and the top plate 53 moving downward drives the contact piece 555 to move downward, and the contact piece 555 moving downward pushes the swing rod 553 to rotate and reset.

[0028] The driving assembly 55 further comprises two ball bearings 554 arranged on the swing rod 553 respectively close to one side of the lifting knob 552 and the contact piece 555, and the two ball bearings 554 are in contact with the lifting knob 552 and the contact piece 555 respectively.

[0029] It can be understood that the setting of the ball bearings can reduce the friction between the lifting knob 552 and the swing rod 553, and reduce the friction between the swing rod 553 and the contact piece 555.

[0030] As shown in Figure 3 The lifting mechanism 5 further comprises a locking assembly 6 for fixing the sliding plate 52, the locking assembly 6 comprises a locking knob 58 threadedly connected with the sliding plate 52, a guide plate 56 fixedly connected with the fixed base 51, and a through hole 57 formed in the guide plate 56, and the locking knob 58 passes through the through hole 57 and is threadedly connected with the sliding plate 52.

[0031] It can be understood that when the top plate 53 is driven to move by the driving assembly 55, the sliding plate 52 is driven to move by the top plate 53, and the locking knob 58 is driven to move by the sliding plate 52, to the appropriate position of the top plate 53, at this time the imaging picture in the waveguide sheet 7 is of the best imaging quality, in order to avoid the top plate 53 from continuing to move, the operator can rotate the locking knob 58, and the locking knob 58 moves towards the sliding plate 52 and abuts against the side edge of the guide plate 56, thereby the top plate 53 can be fixed by the action of the locking knob 58 and the guide plate 56, and the movement of the top plate 53 is prevented.

[0032] As shown in Figure 3As shown, the locking assembly 6 includes a sliding member 61 slidably connected to the base plate 2, a sliding groove 63 opened through the sliding member 61, a bayonet 62 opened on the side of the sliding member 61 close to the positioning member 4, and a plurality of locking rotating members 64 threadedly connected to the top plate 53, and the locking rotating members 64 are threadedly connected to the top plate 53 through the sliding groove 63.

[0033] It can be understood that the operator can place the display screen 9 on the bayonet 62 of the sliding member 61, and then the operator can slide the sliding member 61, and the sliding member 61 drives the display screen 9 to slide, so that the display screen 9 is aligned with the lens 8 below. After alignment, the operator can rotate the locking rotating member 64, and the locking rotating member 64 moves toward the direction close to the sliding plate 52, and abuts against the upper surface of the sliding member 61, thereby limiting the movement of the sliding member 61, so that the display screen 9 is stably located directly above the lens 8.

[0034] To sum up, the driving assembly 55 drives the top plate 53 to move upward, and the top plate 53 drives the sliding plate 52, the support plate 54 and the locking assembly 6 to move upward. When the driving assembly 55 is reset, the spring will reset, and the spring reset drives the sliding plate 52 to move downward, and the sliding plate 52 drives the top plate 53 to move downward, and the top plate 53 drives the support plate 54 and the locking assembly 6 to move downward, thereby the support plate 54 drives the soft board 10 and the driving plate 11 thereon to move up and down, and the locking assembly 6 drives the display screen 9 to move up and down, thereby adjusting the distance between the display screen 9 and the lens 8, and realizing the precise adjustment of the back focus distance of the lens 8 with an accuracy of "0.02mm" to ensure the best imaging quality of the waveguide plate 7, while improving the debugging efficiency; and through the four notches 43 on the four sides of the positioning block 41, locked by the bolts 42, the back focus of four lens 8 products with different shapes can be adjusted, saving the fixture cost.

[0035] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An AR lens back focus adjustment fixture, characterized in that: The device comprises a bottom plate, a fixing seat provided on the bottom plate, a positioning member provided on the fixing seat for fixing a lens, a lifting mechanism provided on the bottom plate for driving a display screen and a driving plate to move up and down, and a locking assembly provided on the lifting mechanism for supporting the display screen; The positioning member includes a positioning block fixedly connected to the fixing seat, and a plurality of notches provided on the positioning block, wherein the lens is located in the notches; The lifting mechanism includes a fixed base fixedly connected to the bottom plate, a sliding plate slidably connected to the fixed base, a top plate arranged on the sliding plate, a supporting plate arranged on the top plate for supporting the driving plate, and a driving component for driving the top plate to move.

2. The AR lens back focus adjustment fixture according to claim 1, characterized in that: The positioning member further includes a bolt, and the positioning block is fixedly connected to the fixing seat via the bolt.

3. The AR lens back focus adjustment fixture according to claim 1, characterized in that: The driving assembly in the lifting mechanism includes a threaded seat fixedly connected to the fixed base, a lifting knob threadedly connected to the threaded seat, a V-shaped swing rod rotatably connected to the fixed base, and a contact piece arranged on the lower side of the top plate, and both sides of the swing rod are in contact with the lifting knob and the contact piece respectively.

4. The AR lens back focus adjustment fixture according to claim 3, characterized in that: The driving assembly further includes two balls arranged on one side of the swing rod close to the lifting knob and the contact member respectively, and the two balls are in contact with the lifting knob and the contact member respectively.

5. The AR lens back focus adjustment fixture according to claim 4, characterized in that: The lifting mechanism also includes a locking assembly for fixing the sliding plate, the locking assembly including a locking knob threadedly connected to the sliding plate, a guide plate fixedly connected to the fixed base, and a through hole opened on the guide plate, through which the locking knob passes and is threadedly connected to the sliding plate.

6. The AR lens back focus adjustment fixture according to claim 1, characterized in that: The locking assembly includes a sliding member slidably connected to the base plate, a sliding groove opened through the sliding member, a bayonet opened on a side of the sliding member close to the positioning member, and a plurality of locking rotating members threadedly connected to the top plate, and the locking rotating members are threadedly connected to the top plate through the sliding groove.

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