Gluing jig for long-strip prism

Abstract

The utility model relates to a long-strip prism gluing jig. The long-strip prism gluing jig comprises a finger-shaped air cylinder, an optical cement leaning body, an L-shaped limiting block and a T-shaped clamping block, the T-shaped clamping blocks are installed on clamping jaws on the left side and the right side of the finger-shaped air cylinder respectively, the L-shaped limiting block is installed in the middle of a body of the finger-shaped air cylinder, and the optical cement leaning body is arranged between the T-shaped clamping blocks and the L-shaped limiting block. One end face of the L-shaped limiting block is provided with a loop-shaped positioning groove, the other end face of the L-shaped limiting block is provided with a double-L-shaped groove, and the double-L-shaped groove is provided with a first tool withdrawal groove used for avoiding the corner of the long prism strip. An L-shaped groove is formed in the T-shaped clamping block, and a second tool withdrawal groove is formed in the L-shaped groove and used for avoiding the corner of the long prism strip; an anti-overflow groove is formed in the middle of the surface of the optical cement leaning body and used for preventing the photocuring glue from overflowing to the surface of the optical cement leaning body in the gluing process. According to the jig, accurate clamping and efficient gluing of the prism are achieved, glue pollution is avoided, and the gluing quality and precision are improved.

Description

Technical Field

[0001] This utility model belongs to the field of optical manufacturing technology, specifically relating to a long strip prism bonding fixture. Background Technology

[0002] In optical component manufacturing, prism bonding is a crucial process. Currently, prisms used in mobile phones have a groove in the center with blackened areas, primarily used to control the light propagation path and eliminate stray light to improve image quality. However, the poor surface precision of the groove leads to light scattering and loss, and it also weakens the prism's mechanical strength, making it prone to breakage during processing or normal use. By designing the prism structure as a bonded type, the optical adhesive used can precisely match the refractive index of the prism material, improving light transmittance and image clarity. Finally, cold-working the bonded prism strips significantly improves the product's mechanical impact and thermal stability, allowing it to adapt to complex environments.

[0003] Existing manual bonding methods have many shortcomings. During the bonding process, it is difficult to apply optical adhesive evenly, resulting in inconsistent adhesive layer thickness. Manual operation makes it difficult to ensure the flatness of the two prism bonding surfaces, resulting in poor flatness of the finished product. In addition, manual bonding is inefficient and has a low product yield. These problems directly affect the light transmittance, imaging clarity, and mechanical strength of the bonded prism.

[0004] Based on the above-mentioned existing technology, this utility model proposes a long strip prism bonding fixture to at least partially solve the above problems. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a gluing fixture for elongated prisms, which solves the problems of uneven gluing, poor flatness, low production efficiency, and insufficient yield in the manual gluing of elongated prisms in the prior art. By adopting a gluing fixture with a cylinder drive and precision positioning structure, high-precision gluing assembly of elongated prisms is achieved, improving the light transmittance, imaging clarity, and mechanical strength of the product.

[0006] The objective of this utility model can be achieved through the following technical solution: A long prism bonding fixture includes a finger-type cylinder, a photopolymer adhesive support, an L-shaped limiting block, and a T-shaped clamping block; the T-shaped clamping block is respectively installed on the left and right grippers of the finger-type cylinder, and the L-shaped limiting block is installed in the middle of the body of the finger-type cylinder; the photopolymer adhesive support is disposed between the T-shaped clamping block and the L-shaped limiting block; one end face of the L-shaped limiting block is provided with a loop-shaped positioning groove, and the other end face is provided with a double L-shaped groove, the double L-shaped groove being provided with a first relief groove for avoiding the corners of the long prism strip; the T-shaped clamping block is provided with an L-shaped groove, the L-shaped groove being provided with a second relief groove for avoiding the corners of the long prism strip; the surface of the photopolymer adhesive support is provided with an anti-overflow groove in the middle to prevent the photopolymer adhesive from overflowing onto the surface of the photopolymer adhesive support during the bonding process.

[0007] As a preferred embodiment of this utility model, the finger-type cylinder is a double-acting cylinder with symmetrically arranged grippers on its left and right sides. The stroke of the grippers of the finger-type cylinder is controlled by a solenoid valve and a speed control valve.

[0008] As a preferred technical solution of this utility model, the anti-overflow groove in the middle of the surface of the adhesive body extends along both the length and shortness directions, and has a depth of 0.2-0.5mm.

[0009] As a preferred technical solution of this utility model, the upper surface of the photoresist body is subjected to precision grinding and polishing treatment, and its flatness accuracy reaches ±1μm.

[0010] As a preferred technical solution of this utility model, the loop-shaped positioning groove of the L-shaped limiting block is used to fix it to the finger-shaped cylinder body.

[0011] As a preferred technical solution of this utility model, the L-shaped grooves on the L-shaped limiting block and the T-shaped clamping block are matched in shape and size to guide and limit the prism during the clamping process.

[0012] The beneficial effects of this utility model are as follows: A finger-type cylinder drives a T-shaped clamping block to cooperate with a fixed L-shaped limiting block. The L-shaped grooves and relief grooves of both blocks achieve prism corner clearance and precise clamping, controlling the height difference between the two prism bonding surfaces to 0.01~0.015mm, ensuring surface flatness. The anti-overflow groove in the middle of the adhesive support effectively prevents UV-cured adhesive from overflowing and contaminating the surface. Combined with precise adhesive thickness control of 0.01mm, this ensures bonding quality. A double-acting cylinder, combined with a solenoid valve and speed control valve, precisely controls the clamping claw stroke, achieving automated clamping of the two prisms. Operation is simple and clamping efficiency is high. The overall structure is simple and easy to operate. Through mechanical positioning and anti-overflow design, bonding precision is improved to the micron level, significantly improving product production quality and efficiency. It is suitable for high-precision batch bonding processing of prisms. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a three-dimensional structural block diagram of the present utility model;

[0015] Figure 2 This is a structural block diagram of the overall front view of this utility model;

[0016] Figure 3 This is a three-dimensional structural block diagram of the finger-shaped cylinder of this utility model;

[0017] Figure 4 This is a three-dimensional structural block diagram of the photoresist backing of this utility model;

[0018] Figure 5 This is a three-dimensional structural block diagram of the L-shaped limiting block of this utility model;

[0019] Figure 6 This is a three-dimensional structural block diagram of the T-shaped clamping block of this utility model.

[0020] In the diagram: 1. Finger-type cylinder; 2. Glossy adhesive backing; 21. Anti-overflow groove; 3. L-shaped limit block; 31. Double L-shaped groove; 4. T-shaped clamping block; 41. L-shaped groove. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] In the manufacturing of optical components, the bonding of prisms is a critical process. Currently, most mobile phone prisms use a center-grooved, black-coated structure to control the optical path and improve image quality. However, this method suffers from poor surface precision, leading to light scattering loss, and weak mechanical strength, making them prone to breakage. Although designing them as bonded types can utilize optical adhesives to match refractive indices and improve light transmittance and image clarity, and cold processing after bonding can enhance stability, the optical adhesive is difficult to apply evenly during the existing manual bonding process, resulting in inconsistent adhesive layer thickness. Manual operation makes it difficult to ensure the flatness of the two bonded surfaces of the prisms, resulting in poor flatness of the finished product. In addition, manual bonding suffers from low efficiency and low product yield.

[0023] For this, please refer to Figure 1-6This embodiment provides a long prism bonding fixture, including a finger-type cylinder 1, a photocurable adhesive support 2, an L-shaped limiting block 3, and a T-shaped clamping block 4. T-shaped clamping blocks 4 are respectively installed on the left and right grippers of the finger-type cylinder 1. Simultaneously, an L-shaped limiting block 3 is installed in the middle of the body of the finger-type cylinder 1, and the photocurable adhesive support 2 is positioned between the T-shaped clamping block 4 and the L-shaped limiting block 3. One end face of the L-shaped limiting block 3 is provided with a loop-shaped positioning groove, and the other end face is provided with a double L-shaped groove 31. The double L-shaped groove 31 has a first relief groove to prevent the corners of the long prism strip from being exposed. The T-shaped clamping block 4 has an L-shaped groove 41, and the L-shaped groove 41 has a second relief groove to prevent the corners of the long prism strip from being exposed. The surface of the photocurable adhesive support 2 has an anti-overflow groove 21 in the middle to prevent the photocurable adhesive from overflowing onto the surface of the photocurable adhesive support 2 during the bonding process.

[0024] In the above technical solution, the finger-type cylinder 1 is preferably a double-acting cylinder with symmetrically arranged grippers on its left and right sides, each fitted with a T-shaped clamping block 4. An L-shaped limiting block 3 is fixed in the middle of the body of the finger-type cylinder 1, thus forming a symmetrical clamping structure. Its adhesive backing 2 serves as the base of the prism, and the central anti-overflow groove 21 on its surface effectively prevents adhesive from overflowing into the non-adhesive area of ​​the prism. Simultaneously, the L-shaped grooves 41 of the L-shaped limiting block 3 and the T-shaped clamping block 4 can limit and guide the prism during the prism bonding process, ensuring that the bonding surfaces of the two prisms remain flat and fitted, with the height difference controlled within the range of approximately 0.01 to 0.015 mm, while simultaneously controlling the thickness of the adhesive layer to approximately 0.01 mm. Compared to traditional prism bonding processes that rely on manual leveling or simple fixtures, this invention addresses the shortcomings of traditional methods. Traditional methods depend on operator experience for height control, with measured fluctuations ranging from 0.05 to 0.1 mm. Furthermore, precise control of the adhesive layer thickness and application rate is difficult, resulting in thickness deviations of 0.03 to 0.1 mm. In contrast, this invention, through precise mechanical positioning and automated control, offers significant advantages in precision control, stability, consistency, efficiency, and cost compared to traditional methods that rely on manual leveling or simple fixtures. It effectively solves the core pain points of traditional processes—low precision, poor stability, and low efficiency—and is suitable for the production of prism components in high-precision optical instruments.

[0025] The finger-type cylinder 1 mentioned above is a double-acting cylinder with symmetrically arranged grippers on its left and right sides. The stroke of the grippers of the finger-type cylinder 1 is controlled by a solenoid valve and a speed control valve.

[0026] This utility model provides a long prism bonding fixture, including a finger-type cylinder 1, a photoresist support 2, an L-shaped limiting block 3, and a T-shaped clamping block 4. The finger-type cylinder 1 is a double-acting cylinder, with T-shaped clamping blocks 4 symmetrically installed on its left and right sides, and an L-shaped limiting block 3 fixedly installed in the middle of the body of the finger-type cylinder 1, thus forming a symmetrical clamping structure; the photoresist support 2 is disposed between the L-shaped limiting block 3 and the T-shaped clamping blocks 4 on both sides, serving as a base for prism bonding.

[0027] One end face of the L-shaped limiting block 3 is machined with a loop-shaped positioning groove for positioning in conjunction with the cylinder body or other fixed structures; the other end face is machined with a double L-shaped groove 31, the bottom of which has a first relief groove to avoid the corners of the prism strip to be glued, preventing the corners of the prism from being squeezed and cracked during the gluing process. The clamping end of the T-shaped clamping block 4 is also machined with an L-shaped groove 41 and a second relief groove, the shape and size of which match the groove of the L-shaped limiting block 3, for cooperating with the corners of the prism strip during clamping, serving as a limiting and protective function.

[0028] The adhesive support 2 is a long, precision flat plate with a central anti-overflow groove 21 extending along both its length and width, with a depth of 0.2-0.5 mm. The function of this central anti-overflow groove 21 is to contain excess UV adhesive during the bonding process, preventing adhesive from overflowing onto the surface of the adhesive support 2 and thus avoiding contamination of the non-bonded areas of the prism. The upper surface of the adhesive support 2 (excluding the central anti-overflow groove 21) is precision ground and polished, achieving a flatness accuracy of ±1 μm to ensure the reference flatness when the prism is placed on it.

[0029] It should be noted that the scope of application of this utility model includes, but is not limited to, the bonding of prisms in the form of long strips and short strips; at the same time, UV-curable adhesives are a type of adhesive that uses a prepolymer as a matrix skeleton, adds reactive diluents, photoinitiators, fillers, coupling agents and other additives, and cures by polymerization reaction initiated by light sources such as ultraviolet (UV) light sources, and whose performance is determined by the synergistic effect of each component, and whose formulation can be selected or customized according to the type of substrate, curing conditions and performance requirements; the prism bonding of this utility model is preferably a UV adhesive.

[0030] The process of gluing long strip prisms using this invention is as follows: First, clean the gluing surfaces of the two long strip prisms to be glued, and evenly apply a layer of UV optical adhesive to the gluing surface of one of the prisms. Then, gently place the two prisms on the optical adhesive support 2, aligning their gluing surfaces and ensuring they are in contact, with the gluing position aligned above the center anti-overflow groove 21 of the optical adhesive support 2. At this time, the L-shaped limiting block 3 remains fixed, serving as a positioning point on one side; activate the finger-type cylinder 1, controlling the left and right grippers of the cylinder to move inward synchronously via the solenoid valve, pushing the T-shaped clamping blocks 4 on both sides to clamp towards the center, gradually clamping and adhering the two long strip prisms together. During the clamping process, the L-shaped grooves 41 of the L-shaped limiting block 3 and the T-shaped clamping blocks 4 guide and limit the prisms, ensuring that the gluing surfaces of the two prisms are tightly adhered and remain flat, with the height difference controlled within the range of 0.01 to 0.015 mm. Meanwhile, since the stroke of the cylinder gripper can be precisely controlled by the speed control valve, the thickness of the adhesive layer can be controlled to approximately 0.01mm. After the prism is clamped in place, a UV curing lamp is used to irradiate the adhesive area to rapidly cure the UV adhesive; after curing, the cylinder gripper is opened to remove the glued prism.

[0031] This invention achieves high-precision and high-efficiency bonding of elongated prisms through the aforementioned structure and process. Practical application verification shows that elongated prisms bonded using this fixture exhibit significantly improved flatness of the bonding surface and uniformity of the adhesive layer thickness, with a light transmittance exceeding 97%. Simultaneously, production efficiency is more than doubled compared to manual bonding, and product yield increases from approximately 65% ​​to over 98%. Furthermore, due to the uniform adhesive layer and controllable thickness, the bonded prism exhibits higher mechanical strength, better meeting the requirements of optical components.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A jig for bonding elongated prisms, characterized in that, The device includes a finger-shaped cylinder, a photopolymer adhesive support, an L-shaped limiting block, and a T-shaped clamping block. The T-shaped clamping block is mounted on the left and right sides of the finger-shaped cylinder's grippers, and the L-shaped limiting block is mounted in the middle of the finger-shaped cylinder's body. The photopolymer adhesive support is positioned between the T-shaped clamping block and the L-shaped limiting block. One end face of the L-shaped limiting block has a loop-shaped positioning groove, and the other end face has a double L-shaped groove. The double L-shaped groove has a first relief groove to prevent the corners of the long prism strip from overflowing. The T-shaped clamping block has an L-shaped groove, and the L-shaped groove has a second relief groove to prevent the corners of the long prism strip from overflowing. The surface of the photopolymer adhesive support has an anti-overflow groove in the middle to prevent the photopolymer adhesive from overflowing onto the surface of the photopolymer adhesive support during the bonding process.

2. The elongated prism bonding fixture according to claim 1, characterized in that, The finger-type cylinder is a double-acting cylinder with symmetrically arranged grippers on its left and right sides. The stroke of the grippers is controlled by a solenoid valve and a speed control valve.

3. The elongated prism bonding fixture according to claim 1, characterized in that, The anti-overflow groove in the middle of the surface of the adhesive body extends along both the length and shortness directions, with a depth of 0.2-0.5mm.

4. The elongated prism bonding fixture according to claim 3, characterized in that, The upper surface of the photoresist is precision ground and polished, and its flatness accuracy reaches ±1μm.

5. The elongated prism bonding fixture according to claim 1, characterized in that, The loop-shaped positioning groove of the L-shaped limiting block is used for fixed connection with the finger-shaped cylinder body.

6. The elongated prism bonding fixture according to claim 1, characterized in that, The L-shaped grooves on the L-shaped limiting block and the T-shaped clamping block are matched in shape and size to guide and limit the prism during clamping.

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