A tooling fixture for bonding two triangular prisms into an optical cube

Abstract

The invention discloses a tooling jig for bonding two triangular prisms into an optical cube, comprising: a frame, on which a lower positioning mechanism for positioning and fixing a lower prism and an upper positioning mechanism for positioning and fixing an upper prism are respectively provided; an up-and-down displacement pressing mechanism, which comprises a vertically arranged slide, a pressing component, and a self-gravity mechanism, wherein the slide is mounted on the frame, and the pressing component and the self-gravity mechanism are both mounted on the sliding end of the slide, wherein the pressing component is arranged downward; two groups of UV lamps are provided, and the two groups of UV lamps are respectively located above and below the frame, and are used to irradiate the upper prism and the lower prism respectively. The invention solves the front-to-back and left-to-right step differences in the bonding of the upper prism and the lower prism by arranging the tooling jig, and can ensure the flatness of the bonding surface of the PBS film material while ensuring their positional relationship.

Description

Technical Field

[0001] The present invention relates to the technical field of tooling and fixture devices, and more particularly to a tooling and fixture used for bonding two triangular prisms into an optical cube. Background Art

[0002] Currently, in the XR field, optical modules used to present images utilize a folded optical path, also known as a pancake solution. This solution significantly reduces product size and weight, thereby optimizing the user viewing experience. The pancake solution, which utilizes triangular prisms to form an optical cube, has emerged as a key design. This solution typically begins with a PBS film placed between two prisms to create the initial shape. Optical design can then be applied around the optical surfaces of the optical cube, with the addition of optical substrates, films, or coatings as needed.

[0003] An optical cube is composed of two triangular prisms and a piece of PBS film. Key requirements are ensuring that the two triangular prisms form the optical cube without noticeable step differences and that the bonded surface of the PBS film is free of wrinkles or other anomalies. Existing technology makes it difficult to guarantee the required step differences after the prisms are bonded together to form the cube. Due to the inherent sensitivity of PBS film, which requires extremely high flatness and the use of a very gentle UV glue to achieve optimal optical results, it is also difficult to guarantee the quality of the bonded surface of the PBS film after the prisms are bonded together to form the optical cube. Therefore, it is necessary to design and develop a tooling fixture for bonding two triangular prisms into an optical cube. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a tooling jig for bonding two triangular prisms into an optical cube. The tooling jig solves the front-to-back and left-to-right step differences between the upper prism and the lower prism, while ensuring their positional relationship and the flatness of the bonding surface of the PBS film material.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tooling fixture for bonding two triangular prisms into an optical cube, comprising:

[0007] A frame, wherein the frame is provided with a base, the base is provided with a supporting groove, both sides of the supporting groove are provided with supporting inclined surfaces, and both sides of the supporting groove are provided with elastic fixing members and adsorption seats, respectively, the elastic fixing members can extend into the supporting groove to fix the lower prism placed in the supporting groove, the adsorption seat is provided with an adsorption hole on one side facing the supporting groove, the adsorption seat is provided with a connecting hole on the other side of the adsorption hole, and the connecting hole is connected to an air pump through an air pipe;

[0008] The vertical displacement pressing mechanism includes a vertically arranged slide, a pressing member, and a self-gravity mechanism. The slide is mounted on a frame. The pressing member and the self-gravity mechanism are both mounted on the sliding end of the slide, wherein the pressing member is arranged downward and directly opposite the supporting slot.

[0009] Two groups of UV lamps are provided, and the two groups of UV lamps are respectively located above and below the frame, for irradiating the upper prism and the lower prism respectively.

[0010] Furthermore, the elastic fixing part includes a top column, a sliding column and a spring. The sliding column is arranged horizontally and is slidably connected to the base. One end of the spring is connected to the reference and the other end is connected to the sliding column. The top column is connected to the sliding column and is arranged in parallel, and the supporting end can extend into the supporting groove to tighten the lower prism.

[0011] Furthermore, the base is provided with film material placement grooves on both sides of the supporting through groove.

[0012] Furthermore, avoidance holes are provided on both sides of the supporting through groove of the base at one end away from the elastic fixing piece.

[0013] Furthermore, the self-gravity mechanism includes a T-shaped block, which is arranged vertically and connected to the sliding end of the slide. Placement platforms are provided on both sides of the top of the T-shaped block, and the placement platforms are used to place load blocks.

[0014] Furthermore, the pressing part includes a pressing base and two pressing blocks, the pressing base is connected to the sliding end of the slide, the two pressing blocks are arranged opposite to each other and are detachably connected to the pressing base, and a pressing slope is provided on the bottom of the pressing block.

[0015] Furthermore, the distances between the UV lamps above and below the rack and the bonding surfaces of the upper prism and the lower prism are exactly the same.

[0016] Furthermore, the base of the frame is provided with a plurality of supporting grooves, adsorption seats, elastic fixing parts and up and down displacement pressing mechanisms arranged side by side, and the UV lamps located above and below the frame can irradiate all the supporting grooves.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The tooling fixture of the present invention positions, places and fixes the upper prism, the lower prism and the PBS film material before bonding, and the three are in a non-contact state, and then presses the three down to bond them together through an up-and-down displacement pressing mechanism, which can effectively solve the front-to-back and left-to-right step differences in the bonding of the prism and the lower prism, while ensuring the accuracy of their positional relationship and the flatness of the bonding surface of the PBS film material; and by arranging a plurality of upper positioning mechanisms, lower positioning mechanisms and up-and-down displacement pressing mechanisms arranged side by side on the frame, batch production bonding can be achieved, which can greatly save manufacturing time and improve output. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0020] Figure 1 Schematic diagram of a fixture used to bond two triangular prisms into an optical cube Figure 1 ;

[0021] Figure 2 Schematic diagram of a fixture used to bond two triangular prisms into an optical cube Figure 2 ;

[0022] Figure 3 It is a structural diagram of the upper positioning mechanism, the lower positioning mechanism, and the upper and lower displacement pressing mechanism;

[0023] Figure 4 Schematic diagram of the structure of the upper positioning mechanism and the lower positioning mechanism;

[0024] Figure 5 Schematic diagram of the structure of the up and down displacement pressing mechanism;

[0025] Figure 6 Schematic diagram of two triangular prisms bonded together to form an optical cube;

[0026] Figure 7 Schematic diagram of the bonding process of two triangular prisms.

[0027] The markings in the figure are: 1. Frame; 2. Base; 201. Supporting groove; 202. Supporting inclined surface; 203. Avoidance hole; 3. Up and down displacement pressing mechanism; 301. Slide; 302. Pressing base; 303. Pressing block; 304. Pressing inclined surface; 305. T-shaped block; 306. Placement table; 307. Locking structure; 4. UV lamp; 5. Elastic fixing part; 501. Sliding column; 502. Top column; 6. Adsorption seat; 601. Adsorption hole; 7. Membrane material placement groove; 8. Upper prism; 9. Lower prism; 10. PBS membrane material; 11. UV glue. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. Throughout the description of the present invention, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0030] A tooling fixture for bonding two triangular prisms into an optical cube, comprising:

[0031] A frame 1, on which a lower positioning mechanism for positioning and fixing a lower prism 9 and an upper positioning mechanism for positioning and fixing an upper prism 8 are respectively provided;

[0032] The vertical displacement pressing mechanism 3 includes a vertically arranged slide 301, a pressing member, and a self-gravity mechanism. The slide 301 is mounted on the frame 1. The pressing member and the self-gravity mechanism are both mounted on the sliding end of the slide 301, wherein the pressing member is arranged downward;

[0033] Two groups of UV lamps 4 are provided, and the two groups of UV lamps 4 are respectively located above and below the frame 1 for irradiating the upper prism 8 and the lower prism 9 respectively.

[0034] Preferably, the lower positioning mechanism includes a base 2 and an elastic fixing member 5, the base 2 is provided with a supporting groove 201, and supporting inclined surfaces 202 are provided on both sides of the supporting groove 201. The elastic fixing member 5 is located on the side of the supporting groove 201 and is used to fix the lower prism 9 placed in the supporting groove 201.

[0035] Preferably, the elastic fixing member 5 includes a top column 502, a sliding column 501 and a spring. The sliding column 501 is arranged horizontally and is slidably connected to the base 2. One end of the spring is connected to the reference and the other end is connected to the sliding column 501. The top column 502 is connected to the sliding column 501 and is arranged in parallel. One end of the top column 502 can extend into the supporting groove 201 to tighten the lower prism 9.

[0036] Preferably, a sliding hole is provided on the base 2, and an anti-slip structure is provided in the sliding hole. The sliding column 501 is located in the sliding hole, and the sliding column 501 is connected with an anti-slip block. The anti-slip block cooperates with the anti-slip structure to realize the sliding and anti-slipping of the sliding column 501. The spring is sleeved on the sliding column 501, one end of which is connected to the anti-slip block, and the other end is connected to the anti-slip structure of the sliding hole. A tightening hole is also provided on the base 2, and the tightening hole is communicated with the supporting groove 201. One end of the lifting column 502 is connected to the sliding column 501, and the other end passes through the tightening hole and extends into the supporting groove 201.

[0037] Specifically, the lower prism 9 is tightened and fixed by setting a top column 502, a sliding column 501 and a spring structure. The force application area of ​​the top column 502 will not be larger than the side of the prism, thereby protecting the prism from edge collapse during the prism bonding process, and making the lower prism 9 tightly fit on the side wall of its supporting groove 201, eliminating the step difference caused by the upper prism 8 not being placed in place.

[0038] Preferably, the base 2 is provided with film material placement grooves 7 on both sides of the supporting groove 201, and the PBS film material 10 is positioned and placed through the film material placement grooves 7, so that the PBS film material 10 is in a non-contact state with the lower prism 9 after being placed. This structural design of the PBS film material 10 in such a state can effectively prevent the PBS film material 10 from wandering after contacting the UV glue before pressing, and the problem of bubbles forming on the bonding surface.

[0039] Preferably, the supporting groove 201 of the base 2 is located at one end away from the elastic fixing member 5 and is provided with avoidance holes 203 on both sides;

[0040] Specifically, the prism is relatively small, and improper operation during the bonding process may cause stress concentration on the right-angled edge, which may easily lead to edge chipping. Therefore, an avoidance hole 203 is provided at a right angle position of the supporting groove 201 relative to the prism to protect the prism from edge chipping during the bonding process.

[0041] Preferably, the upper positioning mechanism includes an adsorption seat 6, which is mounted on the base 2 and located on a side of the supporting groove 201 away from the elastic fixing member 5. The adsorption seat 6 is provided with an adsorption hole 601 on a side facing the supporting groove 201, and a connecting hole is provided on the other side of the adsorption hole 601. The connecting hole is connected to an air pump through an air pipe.

[0042] Specifically, the upper prism 8 is placed in front of the adsorption hole 601 so that the upper prism 8 is adsorbed onto the side wall of the adsorption hole 601 of the adsorption seat 6. This prevents the upper prism 8 from contacting the PBS film 10 and the lower prism 9 before lamination, and also prevents the upper prism 8 from contacting the UV glue 11 pre-dotted on the PBS film 10 in advance. This effectively prevents the PBS film 10 from moving after contacting the UV glue before lamination, and prevents bubbles from forming on the bonding surface.

[0043] Moreover, the structural form of the upper positioning mechanism means that the upper prism 8 does not need to be completely positioned. This design facilitates operation and releases the entire operating area of ​​the upper prism 8 for easy observation, allowing for timely handling of possible problems such as excessive glue overflow.

[0044] Preferably, the adsorption seat 6 of the upper positioning mechanism is provided with an open groove at the position of the film material placement groove 7, and the open groove is connected to the film material placement groove 7, so that the PBS film material 10 can be placed sideways through the open groove, thereby avoiding the possibility of touching the glue that has been applied with UV glue when it is placed from the front, causing damage to the process, and achieving the goal of not affecting the glue surface on the lower prism 9, thereby ensuring the stability of the process.

[0045] Preferably, the self-gravity mechanism includes a T-shaped block 305, which is arranged vertically and connected to the sliding end of the slide 301. Placement platforms 306 are provided on both sides of the top of the T-shaped block 305, and the placement platforms 306 are used to place load blocks;

[0046] Specifically, by setting a T-shaped block 305 and setting a placement platform 306 on the top of the T-shaped block 305, the self-gravity mechanism can be self-weighted by placing several load blocks on the placement platform 306, thereby regulating the self-weight downward force.

[0047] Preferably, the pressing member includes a pressing base 302 and two pressing blocks 303, wherein the pressing base 302 is connected to the sliding end of the slide 301, the two pressing blocks 303 are arranged opposite to each other and are detachably connected to the pressing base 302, and a pressing inclined surface 304 is provided at the bottom of the pressing block 303;

[0048] Specifically, by providing a pressing base 302 and two pressing blocks 303, the two pressing blocks 303 are detachably connected to the pressing base 302, so that the pressing blocks 303 can be more accurately matched and calibrated during adjustment and calibration. The two pressing blocks 303 are provided with a 45° pressing slope 304 at the bottom and are arranged relative to each other, so that the surface of the upper prism 8 can be effectively pressed down, and by arranging the two pressing blocks 303 relative to each other at intervals, the middle part of the upper prism 8 can be exposed, so that the UV light from above can be irradiated onto the bonding surface, thereby ensuring the UV light curing effect.

[0049] Preferably, a locking structure 307 is also provided on the sliding end of the slide 301. The locking structure 307 can be a locking bolt. The locking bolt is threadedly connected to the sliding end of the slide 301 and can tighten the slide rail of the slide 301, thereby locking the sliding end of the slide 301.

[0050] Preferably, the distances between the UV lamps 4 above and below the frame 1 and the bonding surfaces of the upper prism 8 and the lower prism 9 are exactly the same, thereby ensuring the irradiation and curing of the UV glue 11, ensuring the light curing effect and the flatness of the bonding surface, and not affecting the PBS film material 10.

[0051] Preferably, the frame 1 is provided with a plurality of upper positioning mechanisms, a lower positioning mechanism, and an up-and-down displacement pressing mechanism 3, and the plurality of upper positioning mechanisms, the lower positioning mechanism, and the up-and-down displacement pressing mechanism 3 are arranged side by side, and the UV lamps 4 located above and below the frame 1 can irradiate the plurality of upper positioning mechanisms and the lower positioning mechanisms, so that the upper and lower UV lamps 4 perform UV light curing on the plurality of upper and lower prisms 9;

[0052] Specifically, by providing a plurality of upper positioning mechanisms, lower positioning mechanisms and upper and lower displacement pressing mechanisms 3 arranged side by side, the tooling fixture can be processed and manufactured in batches, which can greatly save manufacturing time and increase output.

[0053] The method for using the tooling fixture includes the following steps:

[0054] S1. Complete the initial installation of the fixture and calibrate it;

[0055] S1.1. Pull out the top post 502 and place the calibration block in the supporting groove 201. Then release the top post 502 to tighten and fix the calibration block.

[0056] S1.2. Use the calibration block to adjust the position of the adsorption base 6 that holds the upper prism 8, ensuring that the adsorption sidewall of the adsorption block and the supporting surface of the supporting groove 201 are in the same plane, thereby eliminating the front-to-back step difference between the upper prism 8 and the lower prism 9;

[0057] S1.3. Use the gravity mechanism to make the two pressing blocks 303 contact and press down the calibration block. Then adjust the positions of the two pressing blocks 303 so that the pressing inclined surfaces 304 of the two pressing blocks 303 are completely in contact with the top of the calibration block, thereby eliminating the left and right step difference between the upper prism 8 and the lower prism 9.

[0058] S2, laminating the upper prism 8 and the lower prism 9;

[0059] S2.1. Pull out the top post 502 and place the lower prism 9 in the supporting groove 201. Then release the top post 502 to tighten and fix the lower prism 9.

[0060] S2.2. Apply a layer of UV glue 11 on the bonding surface of the lower prism 9;

[0061] S2.3. Place the PBS film 10 sideways into the film placement slots 7 on both sides of the supporting slot 201, straddling the supporting slot 201, with the PBS film 10 and the lower prism 9 not in contact.

[0062] S2.4. Apply a layer of UV glue 11 on the surface of the PBS membrane 10.

[0063] S2.5. Place the upper prism 8 on the adsorption hole 601 of the adsorption seat 6, and ensure that the upper prism 8, the PBS film 10, and the lower prism 9 are not in contact with each other.

[0064] S2.6. Lower the pressing member so that the two pressing blocks 303 press down on the upper prism 8, so that the upper prism 8, the PBS film 10, and the lower prism 9 are bonded together. The pressing member continues to press down slowly, so that the upper prism 8, the PBS film 10, and the lower prism 9 can have an adaptive pressing process.

[0065] S2.7. Turn on the upper and lower UV lamps 4 to perform photocuring on the bonded prism, PBS film 10 and lower prism 9 through the upper and lower UV lamps 4 to complete the bonding.

[0066] The tooling fixture of the present invention positions, places and fixes the upper prism 8, the lower prism 9 and the PBS film material 10 before bonding, and the three are in a non-contact state, and then presses the three down to bond them together through the up and down displacement pressing mechanism 3, which can effectively solve the front-to-back and left-to-right step differences in the bonding between the prism and the lower prism 9, while ensuring the accuracy of their positional relationship, and also ensures the flatness of the bonding surface of the PBS film material 10; and by arranging a plurality of upper positioning mechanisms, lower positioning mechanisms and up and down displacement pressing mechanisms 3 arranged side by side on the frame 1, batch production bonding can be achieved, which can greatly save manufacturing time and improve output.

[0067] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A fixture for bonding two triangular prisms into an optical cube, characterized in that: include: The frame is provided with a base, and the base is provided with a supporting groove, and supporting inclined surfaces are provided on both sides of the supporting groove, and elastic fixing members and adsorption seats are respectively provided on both sides of the supporting groove, and the elastic fixing members can extend into the supporting groove to fix the lower prism placed in the supporting groove, and the adsorption seat is provided with an adsorption hole on the side facing the supporting groove, and the adsorption seat is provided with a connecting hole on the other side of the adsorption hole, and the connecting hole is connected to an air pump through an air pipe, and the base is provided with film material placement grooves on both sides of the supporting groove, and the PBS film material is positioned and placed through the film material placement grooves, and the PBS film material is placed so that it is in a non-contact state with the lower prism after being placed; The up-and-down displacement pressing mechanism includes a vertically arranged slide, a pressing part, and a self-gravity mechanism. The slide is mounted on a frame. The pressing part and the self-gravity mechanism are both mounted on the sliding end of the slide, wherein the pressing part is arranged downward and directly opposite the supporting through groove. The self-gravity mechanism includes a T-shaped block, which is arranged vertically and connected to the sliding end of the slide. Placement platforms are provided on both sides of the top of the T-shaped block, and the placement platforms are used to place load blocks. Two groups of UV lamps are provided, and the two groups of UV lamps are respectively located above and below the frame, for irradiating the upper prism and the lower prism respectively.

2. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 1, characterized in that: The elastic fixing part includes a top column, a sliding column and a spring. The sliding column is arranged horizontally and is slidably connected to the base. One end of the spring is connected to the reference and the other end is connected to the sliding column. The top column is connected to the sliding column and is arranged in parallel, and the supporting end can extend into the supporting groove to tighten the lower prism.

3. The tool for bonding two triangular prisms into an optical cube according to claim 1, characterized in that: The supporting through slot of the base is located at one end away from the elastic fixing piece and is provided with avoidance holes on both sides.

4. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 1, characterized in that: The pressing part includes a pressing base and two pressing blocks. The pressing base is connected to the sliding end of the slide. The two pressing blocks are arranged opposite to each other and are detachably connected to the pressing base. A pressing slope is provided on the bottom of the pressing block.

5. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 1, characterized in that: The distances between the UV lamps above and below the rack and the bonding surfaces of the upper prism and the lower prism are exactly the same.

6. The tool for bonding two triangular prisms into an optical cube according to claim 1, characterized in that: The base of the frame is provided with a plurality of supporting grooves, adsorption seats, elastic fixing parts and up and down displacement pressing mechanisms arranged side by side, and the UV lamps located above and below the frame can irradiate all the supporting grooves.

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