Tool jig for attaching two triangular prisms into optical cube

Abstract

The utility model discloses a tool jig for attaching two triangular prisms to form an optical cube, which comprises a rack, and 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 arranged on the rack; the up-down displacement pressing mechanism comprises a vertically arranged sliding table, a pressing piece and a self-gravity mechanism, the sliding table is installed on the rack, the pressing piece and the self-gravity mechanism are both installed at the sliding end of the sliding table, and the pressing piece is arranged downwards; the two sets of UV lamps are arranged, and the two sets of UV lamps are located above and below the rack correspondingly and used for irradiating the upper prism and the lower prism correspondingly; the tool jig is arranged to solve the front-back and left-right segment difference of fitting of the upper prism and the lower prism, the position relation of the upper prism and the lower prism is guaranteed, and meanwhile the flatness of the fitting face of the PBS membrane material can be guaranteed.

Description

Technical Field

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

[0002] Currently in the XR field, the optical module used to present images will use a folded optical path, that is, the pancake solution, which can greatly reduce the product size and weight, thereby optimizing the user's viewing experience. Among them, the pancake solution that uses triangular prisms to form a square optical cube came into being. This solution generally uses a piece of PBS film material placed between two prisms for initial formation, and then performs optical design around the optical surface of the optical cube as needed, or adds optical substrates and films or coatings.

[0003] The optical cube is composed of two triangular prisms and a piece of PBS film material. The key point is to ensure that there is no obvious step difference after the two triangular prisms form the optical cube, and there are no wrinkles or other abnormalities on the bonding surface of the PBS film material. It is difficult to ensure the step difference of the cube after the prisms are bonded to form an optical cube with the existing technology. Due to the sensitivity of the PBS film material itself, it requires very high flatness and the use of very soft UV glue to achieve the best optical effect. Therefore, it is also difficult to ensure the effect of the bonding surface of the PBS film material after the prisms are bonded to form an optical cube. Therefore, it is necessary to design and develop a tooling fixture for bonding two triangular prisms into an optical cube. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a tooling jig for bonding two triangular prisms into an optical cube. The tooling jig is used to solve the front-to-back and left-to-right step difference between the upper prism and the lower prism. While ensuring their positional relationship, the flatness of the bonding surface of the PBS film material can be ensured.

[0005] In order to achieve the above purpose, the utility model 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 lower positioning mechanism for positioning and fixing a lower prism and an upper positioning mechanism for positioning and fixing an upper prism;

[0008] The up-and-down displacement pressing mechanism comprises a vertically arranged slide, a pressing member and a self-gravity mechanism, wherein the slide is mounted on a frame, and 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;

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

[0010] Further, the lower positioning mechanism includes a base and an elastic fixing member, the base is provided with a supporting groove, both sides of the supporting groove are provided with supporting inclined surfaces, and the elastic fixing member is located on the side of the supporting groove and is used to fix the lower prism placed in the supporting groove.

[0011] Further, the elastic fixing part includes a top column, a sliding column and a spring. The sliding column is horizontally arranged and 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 one end of the top column can extend into the supporting groove to tighten the lower prism.

[0012] Furthermore, the base is provided with film material placement grooves on both sides of the supporting through groove.

[0013] Furthermore, avoidance holes are arranged on both sides of the supporting through slot of the base at one end away from the elastic fixing piece.

[0014] The upper positioning mechanism further includes an adsorption seat, which is installed on the base and located on the side of the supporting groove away from the elastic fixing part. 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.

[0015] The self-gravity mechanism further comprises a T-shaped block, which is arranged vertically and connected to the sliding end of the slide, and a placing platform is provided on both sides of the top of the T-shaped block, and the placing platform is used to place the load block.

[0016] Further, the pressing part includes a pressing base and two pressing blocks, the pressing base is connected to the sliding end of the slide table, the two pressing blocks are arranged opposite to each other and are detachably connected to the pressing base, and a pressing slope is provided at the bottom of the pressing block.

[0017] 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.

[0018] Furthermore, the frame is provided with a plurality of upper positioning mechanisms, a lower positioning mechanism and an up-and-down displacement pressing mechanism, which are arranged side by side, and the UV lamps located above and below the frame can irradiate the plurality of upper positioning mechanisms and the lower positioning mechanisms.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The tooling fixture of the utility model can effectively solve the front-to-back and left-to-right step differences of the lamination of the prism and the lower prism by positioning, placing and fixing the upper prism, the lower prism and the PBS film material before lamination, and the three are in a non-contact state, and then the three are pressed down and laminated by an up-and-down displacement pressing mechanism, while ensuring the accuracy of their positional relationship and the flatness of the lamination 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 lamination can be realized, which can greatly save manufacturing time and improve output. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0022] Figure 1 A schematic diagram of the structure of a tooling fixture used to bond two triangular prisms into an optical cube Figure 1 ;

[0023] Figure 2 A schematic diagram of the structure of a tooling fixture used to bond two triangular prisms into an optical cube Figure 2 ;

[0024] Figure 3 It is a structural schematic diagram of an upper positioning mechanism, a lower positioning mechanism, and an upper and lower displacement pressing mechanism;

[0025] Figure 4 It is a structural schematic diagram of the upper positioning mechanism and the lower positioning mechanism;

[0026] Figure 5 It is a structural schematic diagram of the up-and-down displacement pressing mechanism;

[0027] Figure 6 A schematic diagram of two triangular prisms bonded together to form an optical cube;

[0028] Figure 7 Schematic diagram of the bonding process of two triangular prisms.

[0029] 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. Sliding table; 302. Pressing base; 303. Pressing block; 304. Pressing inclined surface; 305. T-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

[0030] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., 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 narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0032] A tooling fixture for bonding two triangular prisms into an optical cube, comprising:

[0033] 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;

[0034] The up-and-down displacement pressing mechanism 3 comprises a vertically arranged slide 301, a pressing member and a self-gravity mechanism, wherein the slide 301 is mounted on the frame 1, and 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;

[0035] 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.

[0036] 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, both sides of the supporting groove 201 are provided with supporting inclined surfaces 202, and 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.

[0037] 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 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 arranged in parallel, and one end of the top column 502 can extend into the bearing groove 201 to tighten the lower prism 9;

[0038] Preferably, a sliding hole is provided on the base 2, 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 is connected to the anti-slip block, and the other end is connected to the anti-slip structure of the sliding hole, the base 2 is also provided with a tightening hole, the tightening hole is communicated with the supporting through groove 201, one end of the top column 502 is connected to the sliding column 501, and the other end passes through the tightening hole and extends into the supporting through groove 201;

[0039] 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 surface 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.

[0040] 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, and the PBS film material 10 is placed so as to be in a non-contact state with the lower prism 9. This structural design designs such a state at the PBS film material 10 to effectively prevent the PBS film material 10 from wandering after contacting the UV glue before lamination, and bubbles from forming on the gluing surface.

[0041] 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;

[0042] Specifically, the prism is small in size, and improper operation during the bonding process may cause stress concentration on the right-angled edge, which may easily cause edge chipping. Therefore, a 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.

[0043] Preferably, the upper positioning mechanism includes an adsorption seat 6, which is installed on the base 2 and located at a side of the supporting groove 201 away from the elastic fixing member 5, and the adsorption seat 6 is provided with an adsorption hole 601 on one side facing the supporting groove 201, and the adsorption seat 6 is provided with a connecting hole on the other side of the adsorption hole 601, and the connecting hole is connected to an air pump through an air pipe;

[0044] 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, so that the upper prism 8 does not contact the PBS film 10 and the lower prism 9 before lamination, and does not contact the UV glue 11 pre-dotted on the PBS film 10 in advance, thereby effectively preventing the PBS film 10 from moving after contacting the UV glue before lamination, and bubbles from forming on the bonding surface;

[0045] Furthermore, the structural form of the upper positioning mechanism makes it unnecessary for the upper prism 8 to be completely positioned. This design facilitates operation and releases the entire operating area of ​​the upper prism 8 for easy observation, so that possible problems such as excessive glue overflow can be dealt with in a timely manner.

[0046] 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 placed from the front, causing process damage, and achieving the goal of not affecting the glue surface on the lower prism 9, thereby ensuring the stability of the process.

[0047] 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, and a placement platform 306 is provided on both sides of the top of the T-shaped block 305, and the placement platform 306 is used to place the load block;

[0048] Specifically, by setting a T-shaped block 305 and setting a placement table 306 on the top of the T-shaped block 305, the self-weight mechanism can be self-weighted by placing a number of load blocks on the placement table 306, thereby regulating the self-weight downward pressure.

[0049] 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;

[0050] 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 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 the two pressing blocks 303 are arranged relative to each other at intervals, so that 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.

[0051] 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.

[0052] Preferably, the distances from the UV lamps 4 above and below the frame 1 to 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 membrane material 10.

[0053] 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;

[0054] 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 improve output.

[0055] The method for using the tooling fixture comprises the following steps:

[0056] S1. Complete the preliminary installation of the tooling and fixture and perform calibration;

[0057] S1.1. Pull out the top column 502, place the calibration block in the supporting groove 201, and then release the top column 502 to make the top column 502 press and fix the calibration block;

[0058] S1.2, use the calibration block to adjust the position of the adsorption seat 6 fixing the upper prism 8, to ensure that the adsorption side wall of the adsorption block and the bearing surface of the bearing groove 201 are in the same plane, thereby eliminating the front and rear step difference between the upper prism 8 and the lower prism 9;

[0059] S1.3. Use the self-gravity mechanism to make the two pressing blocks 303 contact and press down the calibration block, and 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 fitted with the top of the calibration block, thereby eliminating the left and right step difference of the upper prism 8 and the lower prism 9.

[0060] S2, laminating the upper prism 8 and the lower prism 9;

[0061] S2.1, pull out the top column 502, place the lower prism 9 in the supporting groove 201, and then release the top column 502 to make the top column 502 press and fix the lower prism 9;

[0062] S2.2, apply a layer of UV glue 11 on the bonding surface of the lower prism 9;

[0063] S2.3, place the PBS film 10 sideways into the film placement grooves 7 on both sides of the supporting groove 201 and across the supporting groove 201, and the PBS film 10 is in a non-contact state with the lower prism 9;

[0064] S2.4, apply a layer of UV glue 11 on the surface of the PBS membrane material 10;

[0065] S2.5, placing the upper prism 8 on the adsorption hole 601 of the adsorption seat 6, and making the upper prism 8, the PBS film material 10 and the lower prism 9 not in contact with each other;

[0066] S2.6, lower the pressing piece, so that the two pressing blocks 303 press down the upper prism 8, so that the upper prism 8, the PBS film material 10 and the lower prism 9 are attached, and the pressing piece continues to press down slowly, so that the upper prism 8, the PBS film material 10 and the lower prism 9 can have an adaptive pressing process;

[0067] S2.7, turn on the upper and lower UV lamps 4, and use the upper and lower UV lamps 4 to photo-cure the prism, PBS film material 10 and lower prism 9 in the bonded state to complete the bonding.

[0068] The tooling fixture of the utility model can effectively solve the front-to-back and left-to-right step difference of the lamination between the prism and the lower prism 9 by positioning, placing and fixing the upper prism 8, the lower prism 9 and the PBS film material 10 before lamination, and the three are in a non-contact state, and then the three are pressed down and laminated by the up-and-down displacement pressing mechanism 3, so as to ensure the accuracy of their positional relationship and the flatness of the lamination 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 lamination can be realized, which can greatly save manufacturing time and improve output.

[0069] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tooling fixture for bonding two triangular prisms into an optical cube, characterized in that: include: A frame, wherein the frame is provided with a lower positioning mechanism for positioning and fixing a lower prism and an upper positioning mechanism for positioning and fixing an upper prism; The up-and-down displacement pressing mechanism comprises a vertically arranged slide, a pressing member and a self-gravity mechanism, wherein the slide is mounted on a frame, and 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; The UV lamps are provided in two groups, and the two groups of UV lamps are respectively located above and below the frame, and are used 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 lower positioning mechanism includes a base and an elastic fixing member. The base is provided with a supporting groove. Both sides of the supporting groove are provided with supporting inclined surfaces. The elastic fixing member is located on the side of the supporting groove and is used to fix the lower prism placed in the supporting groove.

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

4. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 2, characterized in that: The base is provided with film material placement grooves on both sides of the supporting through groove.

5. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 2, 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.

6. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 2, characterized in that: The upper positioning mechanism includes an adsorption seat, which is installed on the base and located on the side of the supporting groove away from the elastic fixing part. 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.

7. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 2, characterized in that: 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.

8. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 2, characterized in that: The pressing part comprises a pressing base and two pressing blocks, wherein the pressing base is connected to the sliding end of the slide table, the two pressing blocks are arranged opposite to each other at an interval and are detachably connected to the pressing base, and a pressing inclined surface is arranged at the bottom of the pressing block.

9. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 2, 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.

10. The tooling fixture for bonding two triangular prisms into an optical cube according to claim 1, characterized in that: The frame is provided with a plurality of upper positioning mechanisms, a lower positioning mechanism and an up-and-down displacement pressing mechanism, which are arranged side by side, and UV lamps located above and below the frame can irradiate the plurality of upper positioning mechanisms and the lower positioning mechanisms.

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