Fixture

Abstract

The utility model relates to the technical field of clamping tools, and provides a clamp. The fixture comprises a limiting seat and a supporting assembly. Wherein the limiting seat is provided with a film coating hole, the inner wall of the film coating hole is provided with a landing edge, and the landing edge and the inner wall of the film coating hole are matched to define a limiting space; the limiting space is used for limiting the optical element, and an opening in at least one end of the coating hole is matched with the coating surface of the optical element in shape; the supporting assembly is arranged on the limiting base and used for limiting the optical element at a preset height, and at the preset height, the pressure between the film coating face of the optical element and the landing edge is a preset value. According to the utility model, the defect that the contact surface of an element and the fixture generates a clamping mark when the fixture in the prior art is used is overcome, and the fixture capable of reducing the clamping mark is realized, so that the qualified rate of the optical element is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of clamping tool technology, and in particular to a clamp. Background Technology

[0002] With the development of high-end optical system applications, the precision requirements for optical components are becoming increasingly stringent. These precision requirements involve a variety of parameters, especially for coated products such as lenses, which involve multiple requirements for the coating layers. The precision requirements for coatings in high-end optical components also vary across different fields and applications. Optical coating involves depositing one or more layers of material onto the surface of an optical component to alter its optical properties or improve its optical performance.

[0003] When coating optical components, they need to be clamped. Current methods often use sandwich clamps to fix the optical components. However, under this clamping action, the weight of the optical component itself can cause marks to form on the contact surface between the optical component and the clamp, thus reducing the yield rate of the optical components. Utility Model Content

[0004] This invention provides a clamp to solve the problem that in the prior art, the contact surface between the component and the clamp will have a jamming defect during use, thereby realizing a clamp that can reduce jamming and thus greatly improve the pass rate of optical components.

[0005] This utility model provides a clamp, comprising:

[0006] A limiting seat is provided with a coating hole, and the inner wall of the coating hole is provided with an overlap. The overlap and the inner wall of the coating hole cooperate to form a limiting space. The limiting space is used to limit optical elements, and the opening at at least one end of the coating hole is adapted to the shape of the coating surface of the optical element.

[0007] A support assembly is provided on the limiting seat. The support assembly is used to limit the optical element at a preset height. At the preset height, the pressure between the coated surface of the optical element and the overlap is a predetermined value.

[0008] According to the present invention, a clamp is provided at the corner of the coating hole, and the clearance hole is used to provide clearance space for the assembly of the optical element.

[0009] According to the present invention, the clamp is provided with at least two sets of support components, and the two sets of support components are arranged at intervals along the length direction of the coating hole.

[0010] According to the present invention, a clamp is provided, the support component comprising:

[0011] Two support bases are provided on both sides of the coating hole at a distance along the width direction of the coating hole;

[0012] A limiting rod passes through the two supports and the optical element located between the two supports, for limiting the optical element to the preset height.

[0013] According to the present invention, a clamp is provided, the support base comprising:

[0014] The base is located within the limiting seat;

[0015] A support rod is provided on the base, and a limiting hole is provided at the end of the support rod away from the base. The limiting hole is used to limit the limiting rod.

[0016] According to the present utility model, the upper surface of the limiting seat is provided with a limiting groove, the limiting groove is provided with a corresponding one-to-one correspondence with the base, and the base is located inside the limiting groove;

[0017] The bottom of the limiting groove is provided with a first fixing hole, and the base is provided with a second fixing hole. The first fixing hole and the second fixing hole are provided in a one-to-one correspondence.

[0018] The base is detachably disposed inside the limiting groove via a connector, which passes through the corresponding first fixing hole and second fixing hole.

[0019] According to the present invention, the clamp is provided with the overlapping edge close to the bottom surface of the limiting seat.

[0020] According to the present invention, the width of the overlap is smaller than the width of the edge located on the outer periphery of the optical element.

[0021] According to the present invention, the limiting seat includes a flat structure.

[0022] According to the present invention, the coating hole is located in the center of the limiting seat.

[0023] The clamp provided by this invention, through the overlap and limiting of the coating hole, supports the optical element at a preset height, ensuring that the pressure between the coating surface of the optical element and the overlap remains at a predetermined value. Because the support component offsets part of the weight of the optical element, the contact pressure between the optical element and the overlap is reduced, thereby lowering the risk of the optical element leaving marks on the contact surface due to its own weight. Simultaneously, the support component also prevents the optical element from falling. This invention ensures the stability of the optical element during the coating process, while reducing surface damage caused by mechanical contact and improving coating quality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the clamp provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the limiting seat of the clamp provided by this utility model;

[0027] Figure 3 This is a schematic diagram of the support base of the clamp provided by this utility model;

[0028] Figure 4 This is a bottom view of the optical element of the clamp provided by this utility model.

[0029] Figure label:

[0030] 100: Limiting seat; 110: Coating hole; 120: Overlap; 130: Clearance hole; 140: Limiting groove; 150: First fixing hole;

[0031] 200: Support component; 210: Support base; 211: Base; 212: Support rod; 213: Limiting hole; 214: Second fixing hole; 220: Limiting rod;

[0032] 300: Optical element; 310: Coated area; 320: Edge. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] Vacuum evaporation, or vapor deposition for short, refers to a process in which a coating material (or film material) is evaporated under vacuum conditions using a specific heating and evaporation method, causing the vaporized particles to condense on the substrate surface to form a film. Vacuum deposition is an early and widely used vapor phase deposition technology, offering advantages such as simple film formation, high film purity and density, and unique film structure and properties. With the development of high-end optical systems, the precision requirements for optical components are becoming increasingly stringent. These precision requirements involve multiple parameters, especially for coated products such as lenses, which involve various requirements for the film layers. The precision requirements for high-end optical component coatings also vary across different fields and applications. Optical coating involves depositing one or more layers of material onto the surface of an optical component to alter its optical properties or improve its optical performance.

[0035] The bottom center of the optical element is the coating area 310, and the outer periphery of the coating area 310 is the edge 320, which facilitates the mounting of the optical element. During vapor deposition, only the coating area 310 needs to be vapor-deposited. Currently, the existing method of fixing the optical element during vapor deposition uses a clamping fixture. Under this fixture, due to the weight of the optical element itself, marks will be generated on the contact surface between the optical element and the fixture, thus reducing the yield rate of the optical element. To solve this technical problem, this utility model provides a novel fixture. The following describes... Figures 1-4 Describe the structure and working principle of this utility model.

[0036] Reference Figure 1 and Figure 2 The clamp provided by the present invention includes a limiting seat 100 and a support assembly 200. The limiting seat 100 has a coating hole 110, and the inner wall of the coating hole 110 has an overlap 120. The overlap 120 and the inner wall of the coating hole 110 cooperate to form a limiting space. The limiting space is used to limit an optical element 300. The opening at at least one end of the coating hole 110 is adapted to the shape of the coating surface of the optical element 300. The support assembly 200 is disposed on the limiting seat 100 and is used to limit the optical element 300 to a preset height. At the preset height, the pressure between the coating surface of the optical element 300 and the overlap 120 is a predetermined value.

[0037] It should be noted that the preset height can be understood as ensuring that, through measurement of the dimensions of the optical element 300, it can be placed precisely on the overlap 120 under the action of the support component 200. Furthermore, the support component 200 can also offset part of the weight of the optical element 300, thereby reducing the likelihood of jamming between the optical element 300 and the clamp due to its own weight. The preset pressure value is also set to avoid jamming between the optical element 300 and the clamp.

[0038] Specifically, the connection between the limiting seat 100 and the support component 200 can be achieved by bolt fixing. The limiting seat 100 may have a threaded hole, and the bottom of the support component 200 has a through hole. The bolt passes through the through hole and engages with the threaded hole to fix the support component 200 onto the limiting seat 100. In another embodiment, the limiting seat 100 may have a slot, and the bottom of the support component 200 may have a protrusion that matches the slot. The connection between the two is achieved through the insertion and engagement of the protrusion and the slot. Furthermore, the limiting seat 100 and the support component 200 can also be fixedly connected by welding or bonding. Welding methods can include spot welding or laser welding, and bonding methods can include epoxy resin adhesive or acrylic adhesive.

[0039] In the above structure, the support assembly 200 supports the optical element 300 at a preset height by limiting the overlap 120 of the coating hole 110, thus maintaining the pressure between the coating surface of the optical element 300 and the overlap 120 at a predetermined value. Since the support assembly 200 offsets part of the weight of the optical element 300, the contact pressure between the optical element 300 and the overlap 120 is reduced, thereby reducing the risk of the optical element 300 getting stuck on the contact surface due to its own weight. At the same time, the support assembly 200 also prevents the optical element 300 from falling. This invention ensures the stability of the optical element 300 during the coating process, while reducing surface damage caused by mechanical contact and improving coating quality.

[0040] In some possible embodiments, the limiting seat 100 may be provided with an adjustment mechanism, which includes a fine-tuning screw located on the side wall of the limiting seat 100. The end of the fine-tuning screw contacts the support assembly 200. By rotating the fine-tuning screw, the height of the support assembly 200 can be adjusted, thereby precisely controlling the preset height of the optical element 300. For example, when coating optical elements 300 with different thicknesses, the support position of the support assembly 200 can be changed by the fine-tuning screw, so that the coated surface of the optical element 300 always maintains appropriate pressure with the edge 120. In addition, the edge 120 may be provided with an elastic pad made of polyurethane or silicone material to further buffer the contact force between the optical element 300 and the edge 120. This expansion solution can accommodate optical elements 300 of different sizes and weights, improving the versatility and protective effect of the clamp.

[0041] Reference Figure 2 In some embodiments of this utility model, the corner of the coating hole 110 is provided with a clearance hole 130, which is used to provide clearance space for the assembly of the optical element 300.

[0042] It is understood that the coated surface of the optical element 300 is rectangular or has edges at corners. To avoid interference between the edges at the corners of the optical element 300 and the corners of the clearance hole 130 during installation, the clearance hole 130 is provided. In the above structure, the clearance hole 130 can be directly integrally formed with the coating hole 110, for example, by milling or wire cutting to machine the clearance structure on the limiting seat 100. In another embodiment, the edge of the clearance hole 130 can be chamfered or rounded to reduce the contact stress with the corner edges of the optical element 300.

[0043] In this embodiment, the clearance hole 130 ensures that the corner edges of the optical element 300 will not interfere with the inner wall of the coating hole 110 during installation, thus ensuring that the optical element 300 can be smoothly assembled into the limiting space. Because the clearance hole 130 provides additional clearance space, the optical element 300 is less prone to damage from bumps during installation and adjustment, while also reducing assembly difficulty. This structure can adapt to optical elements 300 of different shapes, and is particularly suitable for coating positioning of rectangular or sharp-cornered optical elements 300, improving the compatibility and ease of operation of the fixture.

[0044] Reference Figure 1 In some embodiments of this utility model, the support component 200 is provided with at least two sets, and the two sets of support components 200 are spaced apart along the length direction of the coating hole 110.

[0045] In this embodiment, the spaced arrangement of the two sets of support components 200 provides stable linear support for the optical element 300, avoiding uneven stress caused by single-point support. After the optical element 300 is installed, the two sets of support components 200 share its weight, ensuring a uniform pressure distribution between the coated surface and the overlap 120. This guarantees reliable positioning and reduces the risk of jamming due to excessive local pressure. This structure is particularly suitable for clamping elongated optical elements 300. By adjusting the spacing of the support components 200, it can accommodate optical elements 300 of different lengths, improving the versatility of the clamp.

[0046] In other embodiments, for ultra-long optical elements 300, the limiting seat 100 can be provided with three or more sets of support components 200, evenly distributed along the length direction of the coating hole 110. Each set of support components 200 is independently adjustable to ensure that the optical element 300 remains horizontal as a whole. For example, when coating a 2.8-meter-long strip-shaped optical element 300, five sets of support components 200 are evenly distributed for support, and the height of each set of support can be calibrated individually. This extended solution can effectively suppress the bending deformation of the optical element 300 due to its own weight and ensure the accuracy of the coating surface shape.

[0047] Reference Figure 1In some embodiments of this utility model, the support assembly 200 includes two support seats 210 and a limiting rod 220. The two support seats 210 are spaced apart on both sides of the coating hole 110 along the width direction of the coating hole 110; the limiting rod 220 passes through the two support seats 210 and the optical element 300 located between the two support seats 210, and is used to limit the optical element 300 to a preset height.

[0048] Specifically, the support base 210 and the limiting rod 220 can be fixed using a threaded connection structure. The top of the support base 210 has a threaded through hole, and both ends of the limiting rod 220 have external threads. The limiting rod 220 is fixed to a predetermined position at the top of the support base 210 by tightening the nut. In another embodiment, the support base 210 can have a stepped hole, and the limiting rod 220 can be a smooth rod structure. Radial locking is achieved by a set screw on the side of the support base 210. For scenarios requiring rapid adjustment, the support base 210 can be equipped with an eccentric cam locking mechanism. Rapid fixing and release are achieved by rotating the cam to press the limiting rod 220.

[0049] In this embodiment, the support base 210 is symmetrically arranged along the width direction of the coating hole 110, and a stable two-point support structure is formed by the limiting rod 220 penetrating through the optical element 300. This structure can ensure the positioning accuracy of the optical element 300 in the vertical direction, and at the same time, the preset height of the optical element 300 can be precisely controlled by adjusting the installation height of the limiting rod 220. Since the supporting force is evenly transmitted to the two support bases 210 on both sides through the limiting rod 220, the stress state of the optical element 300 is more balanced, effectively avoiding the off-center load problem that may be caused by unilateral support, and reducing the risk of clamping deformation while ensuring positioning accuracy.

[0050] Reference Figure 2 and Figure 3 In some embodiments of this utility model, the support base 210 includes a base 211 and a support rod 212. The base 211 is limited to the limiting seat 100; the support rod 212 is disposed on the base 211, and a limiting hole 213 is provided at the end of the support rod 212 away from the base 211. The limiting hole 213 is used to limit the limiting rod 220.

[0051] The upper surface of the limiting seat 100 is provided with a limiting groove 140, and the limiting groove 140 is provided in a one-to-one correspondence with the base 211, with the base 211 located inside the limiting groove 140; the bottom of the limiting groove 140 is provided with a first fixing hole 150, and the base 211 is provided with a second fixing hole 214, with the first fixing hole 150 and the second fixing hole 214 being provided in a one-to-one correspondence; the base 211 is detachably provided inside the limiting groove 140 through a connector, with the connector passing through the corresponding first fixing hole 150 and second fixing hole 214.

[0052] In the above structure, the base 211 and the limiting seat 100 can be connected by bolts. The first fixing hole 150 is a threaded hole, and the second fixing hole 214 is a through hole. The bolt passes through the second fixing hole 214 and is screwed into the first fixing hole 150 to fix the base 211. In another embodiment, both the first fixing hole 150 and the second fixing hole 214 can be through holes, and a bolt and nut can be used for fastening. For scenarios requiring quick assembly and disassembly, the connector can use a quick-release pin structure. The quick-release pin passes through the first fixing hole 150 and the second fixing hole 214 and is locked by a spring clip. The support rod 212 and the base 211 can be integrally formed or detachably connected by bolts. The limiting rod 220 and the limiting hole 213 can be fitted with a clearance fit, and a set screw is provided on the side of the support rod 212 to achieve radial locking.

[0053] In this embodiment, the circumferential and radial positions of the base 211 are constrained by the limiting groove 140 to ensure the installation position accuracy of the support 210. Through the mating connection of the first fixing hole 150 and the second fixing hole 214, the base 211 can be stably fixed within the limiting groove 140, ensuring the overall rigidity of the support assembly 200. The support rod 212 positions the limiting rod 220 through the limiting hole 213, keeping the limiting rod 220 horizontal, thereby ensuring the uniformity of the coating surface height of the optical element 300. This structure realizes a modular design of the support assembly 200, facilitating the adjustment of the support position according to the size of the optical element 300, while ensuring the stability and repeatability of the clamping system.

[0054] In some embodiments of this utility model, the overlap 120 is disposed close to the bottom surface of the limiting seat 100. Specifically, the way the overlap 120 is disposed close to the bottom surface of the limiting seat 100 can be achieved by integral processing, that is, the overlap structure close to the bottom surface is directly formed when processing the coating hole 110.

[0055] In this embodiment, the overlap 120 is positioned close to the bottom surface of the limiting seat 100, resulting in a smaller gap between the coated surface of the optical element 300 and the bottom surface of the limiting seat 100 after installation. This structure facilitates the implementation of the coating process. The smaller gap reduces the loss of coating material during transmission and improves coating uniformity. Simultaneously, the optical element 300 is not excessively recessed within the limiting seat 100, making it easier to observe the coating process and make process adjustments.

[0056] In some embodiments of this invention, the width of the overlap 120 is smaller than the width of the edge 320 located on the outer periphery of the optical element 300.

[0057] In this embodiment, the design that the overlap 120 is narrower than the edge 320 of the optical element 300 effectively avoids the overlap 120 from obstructing the coating area 310, ensuring that the coating material can completely cover the effective working area of ​​the optical element 300. This structure ensures accurate positioning of the optical element 300 without affecting the normal progress of the coating process. Since the overlap 120 only contacts the non-working area of ​​the optical element 300, coating contamination is avoided, and the impact of contact stress on the working surface of the optical element 300 is reduced. This design is particularly suitable for precision optical elements 300 that require high integrity of the coating area 310, maximizing the effective coating area while ensuring clamping reliability.

[0058] In some embodiments of this utility model, the limiting seat 100 includes a flat structure; specifically, the limiting seat 100 is a flat cylindrical structure. A coating hole 110 is disposed in the center of the limiting seat 100. The flat cylindrical limiting seat 100 can be manufactured by integral casting or machining.

[0059] In this embodiment, the flat cylindrical limiting seat 100 structure has good rigidity and stability, effectively resisting the vibration effects during the coating process. The coating hole 110 located in the center positions the optical element 300 at the center of symmetry of the limiting seat 100, which helps maintain the uniformity of force distribution. This structural layout ensures a balanced weight distribution of the limiting seat 100, facilitating installation and positioning in the coating equipment. The flat structural design also saves installation space, making the overall structure of the coating equipment more compact. The cylindrical shape of the limiting seat 100 facilitates manufacturing and ensures high dimensional accuracy and geometric tolerances, providing a fundamental guarantee for the accurate positioning of the optical element 300.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A clamp, characterized in that, include: A limiting seat (100) is provided with a coating hole (110), and the inner wall of the coating hole (110) is provided with an overlap (120). The overlap (120) and the inner wall of the coating hole (110) cooperate to form a limiting space; the limiting space is used to limit the optical element (300), and the opening at at least one end of the coating hole (110) is adapted to the shape of the coating surface of the optical element (300); A support assembly (200) is provided on the limiting seat (100) for limiting the optical element (300) at a preset height; at the preset height, the pressure between the coated surface of the optical element (300) and the overlap (120) is a predetermined value.

2. The clamp according to claim 1, characterized in that, The corner of the coating hole (110) is provided with a clearance hole (130), which is used to provide clearance space for the assembly of the optical element (300).

3. The clamp according to claim 1, characterized in that, The support assembly (200) is provided in at least two sets, and the two sets of support assemblies (200) are spaced apart along the length direction of the coating hole (110).

4. The clamp according to claim 3, characterized in that, The support component (200) includes: Two support bases (210) are provided on both sides of the coating hole (110) at intervals along the width direction of the coating hole (110); A limiting rod (220) passes through the two supports (210) and the optical element (300) located between the two supports (210), for limiting the optical element (300) to the preset height.

5. The clamp according to claim 4, characterized in that, The support base (210) includes: The base (211) is located within the limiting seat (100); A support rod (212) is provided on the base (211). A limiting hole (213) is provided at one end of the support rod (212) away from the base (211). The limiting hole (213) is used to limit the limiting rod (220).

6. The clamp according to claim 5, characterized in that, The upper surface of the limiting seat (100) is provided with a limiting groove (140), the limiting groove (140) and the base (211) are respectively arranged in a corresponding manner, and the base (211) is located inside the limiting groove (140); The bottom of the limiting groove (140) is provided with a first fixing hole (150), and the base (211) is provided with a second fixing hole (214). The first fixing hole (150) and the second fixing hole (214) are provided in a one-to-one correspondence. The base (211) is detachably disposed inside the limiting groove (140) via a connector, the connector passing through the corresponding first fixing hole (150) and second fixing hole (214).

7. The clamp according to any one of claims 1-6, characterized in that, The edge (120) is disposed near the bottom surface of the limiting seat (100).

8. The clamp according to claim 7, characterized in that, The width of the overlap (120) is smaller than the width of the edge (320) located on the outer periphery of the optical element (300).

9. The clamp according to claim 7, characterized in that, The limiting seat (100) includes a flat structure.

10. The clamp according to claim 9, characterized in that, The coating hole (110) is located in the center of the limiting seat (100).

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