Hinge structure and door assembly

Abstract

The application relates to a hinge structure and a door assembly. The hinge structure comprises a fixed hinge side, a movable hinge side, a connecting shaft and a dustproof shaft sleeve. The fixed hinge side comprises a first plane part, a first shaft sleeve part and a second shaft sleeve part. The first plane part comprises a first surface and a second surface. The movable hinge side comprises a second plane part and a third shaft sleeve part. The second plane part comprises a third surface and a fourth surface. The connecting shaft passes through the first shaft sleeve part, the second shaft sleeve part and the third shaft sleeve part in sequence. In a closed state, the included angle between the first plane part and the second plane part is 180 DEG. The first plane part and the second plane part are arranged on the two sides of the connecting shaft. A stepped surface is formed between the first plane part, the first shaft sleeve part and the second plane part. In an open and closed state, the included angle between the second plane part and the first plane part is less than 180 DEG. The movable hinge side approaches the first surface and rotates.

Description

Technical Field

[0001] This application relates to the field of assembly and fitting, and in particular to hinge structures and door components. Background Technology

[0002] In modern industrial production, cleanrooms are widely used in fields such as electronics, pharmaceuticals, and semiconductors, where extremely high cleanliness requirements are necessary. To maintain the cleanliness level of a cleanroom, strict dust control standards apply to the tooling equipment located within it. Currently, most tooling equipment in cleanrooms uses a double-door structure for material handling and equipment maintenance. In actual use, these double doors require frequent opening and closing, inevitably causing airflow and allowing dust-laden air from outside to enter the tooling equipment. Although cleanrooms have air purification systems, the dust that rushes in during door opening and closing is difficult to filter and remove in time. Once dust enters the tooling equipment, it not only directly compromises the cleanroom's established cleanliness level and affects the stability of the production environment, but it can also cause dust particles to adhere to product surfaces, leading to product quality defects, increased defect rates, reduced production efficiency, and severely impacting the company's economic benefits and product competitiveness. Therefore, existing tooling equipment with double-door structures has significant shortcomings in dust control performance and urgently needs improvement. Utility Model Content

[0003] This application provides a hinge structure and door assembly to solve the technical problem of dust or powder generated when the door rotates, which exists in the prior art.

[0004] The hinge structure provided by this utility model includes: a fixed hinge side, a movable hinge side, a connecting shaft, and a dustproof bushing. The fixed hinge side includes a first planar portion, a first bushing portion, and a second bushing portion. The first planar portion includes a first surface and a second surface. The first bushing portion and the second bushing portion are spaced apart on one side of the first planar portion. The first bushing portion extends along the normal direction of the first planar portion and curls towards the first planar portion. The movable hinge side includes a second planar portion and a third bushing portion. The second planar portion includes a third surface and a fourth surface. The third bushing portion is disposed on one side of the second planar portion. The third bushing portion extends along the normal direction of the second planar portion and curls towards the second planar portion. The connecting shaft passes sequentially through the first bushing portion, the second bushing portion, and the third bushing portion to rotatably connect the fixed hinge side and the movable hinge side. The first surface of the fixed hinge side and the fourth surface of the movable hinge side are disposed opposite each other. The dustproof bushing is sleeved between the connecting shaft and the first bushing portion, or between the connecting shaft and the second bushing portion, or between the connecting shaft and the third bushing portion. Along its own axial direction, at least a portion of the structure of the dustproof bushing is sandwiched between the first bushing portion and the second bushing portion, or between the second bushing portion and the third bushing portion.

[0005] In the closed state, the included angle between the first planar portion and the second planar portion is 180°. The first planar portion and the second planar portion are located on both sides of the connecting shaft, and a stepped surface is formed between the first planar portion, the first bushing, and the second planar portion.

[0006] When in the open / closed state, the angle between the second planar portion and the first planar portion is less than 180°, and the movable hinge side rotates closer to the first surface.

[0007] The dustproof bushing includes a cylindrical body and a protruding edge protruding from one end face of the cylindrical body; the dustproof bushing is sleeved between the connecting shaft and the first bushing portion through the cylindrical body, and / or the dustproof bushing is sleeved between the connecting shaft and the second bushing portion through the cylindrical body; along the axial direction, the dustproof bushing is clamped between the first bushing portion and the second bushing portion through the protruding edge.

[0008] The third bushing portion is located between the first bushing portion and the second bushing portion, and the third bushing portion includes a first end and a second end; two dustproof bushings are provided, one dustproof bushing is located between the first end and one of the first bushing portions, and the other dustproof bushing is located between the second end and the second bushing portion.

[0009] The connecting shaft includes an optical axis portion and an end portion. The end portion is located at the top of the optical axis portion and protrudes from the optical axis portion along its own radial direction. It is used to abut and limit the end face of a first bushing portion. The optical axis portion has a limiting groove on the side away from the end portion. The hinge structure also includes a retaining ring, which matches and engages with the limiting groove to abut and limit the end face of the second bushing portion.

[0010] The shaft end is made of nylon.

[0011] The dustproof bushing is made of nylon.

[0012] The rotation angle between the fixed hinge side and the movable hinge side ranges from 90° to 180°.

[0013] The first bushing portion does not protrude from the second surface, and the third bushing portion does not protrude from the third surface.

[0014] This utility model also provides a door assembly, including the hinge structure described above, and further including a frame, a protective door, and a protective cover. The fixed hinge side is detachably connected to the outer side of the frame, and the movable hinge side is detachably connected to the inner side of the protective door. The protective cover covers the outer side of the frame and fits snugly against the protective door so that the hinge structure is not exposed.

[0015] The fixed hinge side is mounted on the outer side of the frame via the second surface of the first flat portion, and the movable hinge side is mounted on the inner side of the protective door via the fourth surface of the second flat portion.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art:

[0017] The hinge structure and door assembly provided in this application embodiment, when the fixed hinge side and the movable hinge side are in a closed state, have an angle of 180° between the first flat portion and the second flat portion, and form a stepped surface between the first flat portion, the first bushing, and the second flat portion. This unique structural design allows for a tight fit, greatly reducing gaps. Dust particles are unlikely to enter the tooling equipment through narrow and irregular gaps, acting like a tight dustproof armor for the equipment, effectively blocking dust carried by the outside air and maintaining the cleanliness level of the cleanroom. When the fixed hinge side and the movable hinge side are in an open or closed state, the angle between the second flat portion and the first flat portion is less than 180°, and the movable hinge side rotates closer to the first surface. This movement method allows airflow to be rationally guided and controlled during the opening and closing of the door, avoiding the introduction of large amounts of dust due to violent air disturbances. Meanwhile, compared with traditional door structures, the gap changes generated when the door components of this application are opened and closed are more controllable. Even at the moment the door is opened, the possibility of dust entering is greatly reduced, further ensuring the cleanliness of the environment in which the tooling equipment is located in the cleanroom, effectively reducing product quality problems caused by dust, improving production efficiency and product competitiveness, and providing reliable protection for the production of industries with strict cleanliness requirements such as electronics, pharmaceuticals, and semiconductors. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 A schematic diagram of the hinge structure in the open state provided in the embodiments of this application;

[0022] Figure 2 for Figure 1 A schematic diagram of the axial structure on the fixed hinge side;

[0023] Figure 3 for Figure 1 A schematic diagram of the axonal structure on the side of the movable hinge;

[0024] Figure 4 for Figure 1 A schematic diagram of the shaft side structure of the connecting shaft;

[0025] Figure 5 for Figure 1 Schematic diagram of the shaft side structure of the dustproof bushing;

[0026] Figure 6 for Figure 1 Schematic diagram of the central hinge structure installed on the axial side of the door body;

[0027] Figure 7 for Figure 1 Exploded view of the hinge structure.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Hinge structure; 11. Fixed hinge side; 111. First flat part; 1111. First surface; 1112. Second surface; 112. First bushing part; 113. Second bushing part; 12. Movable hinge side; 121. Second flat part; 1211. Third surface; 1212. Fourth surface; 122. Third bushing part; 1221. First end; 1222. Second end; 13. Connecting shaft; 131. Optical shaft part; 1311. Limiting groove; 132. Shaft end; 14. Dustproof bushing; 141. Cylindrical body; 142. Protruding edge; 15. Snap ring; 2. Door assembly; 21. Frame; 22. Protective door; 23. Protective cover. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0032] For ease of description, spatial relative terms may be used in this text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptions used in this text have been explained accordingly.

[0033] Existing cleanrooms cannot meet cleanroom standards. To alleviate the above problems, refer to... Figures 1-7 This application provides a hinge structure 1 and a door assembly 2, which can achieve a dust-free effect during the opening and closing of the door.

[0034] Specifically, the hinge structure 1 provided in this application includes: a fixed hinge side 11, a movable hinge side 12, a connecting shaft 13, and a dustproof bushing 14. The fixed hinge side 11 includes a first flat portion 111, a first bushing portion 112, and a second bushing portion 113. The first flat portion 111 includes a first surface 1111 and a second surface 1112. The first bushing portion 112 and the second bushing portion 113 are spaced apart on one side of the first flat portion 111. The first bushing portion 112 extends along the normal direction of the first flat portion 111 and curls towards the first flat portion 111. The movable hinge side 12 includes a second flat portion 121 and a third bushing portion 122. The second flat portion 121 includes a third surface 1211 and a fourth surface 1212. The third bushing portion 122 is disposed on one side of the second flat portion 121 and extends along the normal direction of the second flat portion 121. The connecting shaft 13 extends in the normal direction and curls toward the second flat portion 121; the connecting shaft 13 passes through the first bushing portion 112, the second bushing portion 113 and the third bushing portion 122 in sequence, so that the fixed hinge side 11 and the movable hinge side 12 are rotatably connected, and the first surface 1111 of the fixed hinge side 11 and the fourth surface 1212 of the movable hinge side 12 are disposed opposite to each other; the dustproof bushing 14 is sleeved between the connecting shaft 13 and the first bushing portion 112, or the dustproof bushing 14 is sleeved between the connecting shaft 13 and the second bushing portion 113, or the dustproof bushing 14 is sleeved between the connecting shaft 13 and the third bushing, and at least a part of the structure of the dustproof bushing 14 is sandwiched between the first bushing portion 112 and the second bushing portion 113, or at least a part of the structure of the dustproof bushing 14 is sandwiched between the second bushing portion 113 and the third bushing portion 122 along its own axial direction;

[0035] In the closed state, the included angle between the first planar portion 111 and the second planar portion 121 is 180°. The first planar portion 111 and the second planar portion 121 are respectively disposed on both sides of the connecting shaft 13, and a stepped surface is formed between the first planar portion 111, the first bushing and the second planar portion 121.

[0036] When in the open / closed state, the angle between the second flat portion 121 and the first flat portion 111 is less than 180°, and the movable hinge side 12 rotates close to the first surface 1111.

[0037] Existing double-leaf door hinge structures 1 used in cleanroom tooling typically only have simple connecting pivots and basic hinge components, making them relatively conventional and unable to effectively meet the dustproof requirements when the door is opened and closed. The hinge structure 1 provided in this application represents a significant innovation and optimization in its composition. It not only includes basic connecting components such as a fixed hinge side 11, a movable hinge side 12, and a connecting shaft 13, but also adds a dustproof bushing 14, and features a refined design for the structure of each hinge side. The first bushing portion 112 and the second bushing portion 113 of the fixed hinge side 11 are spaced apart and extend and curl along the normal direction, while the third bushing portion 122 of the movable hinge side 12 also extends and curls along the normal direction. These special structural designs, combined with the dustproof bushing 14, form a more robust dustproof structural system, fundamentally different from the simple hinge connection structures of existing technologies.

[0038] Thus, based on the aforementioned unique structural composition, the hinge structure 1 of this application achieves superior technical effects. In the closed state, the 180° angle formed between the first flat portion 111 and the second flat portion 121, along with the stepped surface structure, combined with the sealing effect of the dustproof bushing 14, significantly reduces gaps and effectively prevents dust from entering the tooling equipment. In the open / closed state, the movable hinge side 12 rotates close to the first surface 1111, effectively controlling airflow during the opening and closing of the door and reducing the risk of dust entering due to air disturbance. Compared to existing technologies, the hinge structure 1 of this application fundamentally solves the problem of dust entering the tooling equipment due to door opening and closing, effectively maintaining the cleanliness level of the cleanroom, significantly reducing the defect rate caused by dust contamination, improving production efficiency and product quality, and providing reliable protection for production scenarios with extremely high cleanliness requirements.

[0039] Considering the specific structure and installation scheme of the dustproof bushing 14, in the hinge structure 1 provided in this application embodiment, the dustproof bushing 14 includes a cylindrical body 141 and a protruding edge 142 protruding from one end face of the cylindrical body 141; the dustproof bushing 14 is sleeved between the connecting shaft 13 and the first bushing portion 112 through the cylindrical body 141, and / or the dustproof bushing 14 is sleeved between the connecting shaft 13 and the second bushing portion 113 through the cylindrical body 141; along the axial direction, the dustproof bushing 14 is clamped between the first bushing portion 112 and the second bushing portion 113 through the protruding edge 142.

[0040] Existing hinge structures 1 in cleanroom tooling equipment often lack specialized and finely designed dustproof components. Even when similar sealing structures exist, their simple design and arbitrary installation methods make it difficult to achieve ideal dustproof effects. However, in the hinge structure 1 of this application embodiment, the dustproof bushing 14 adopts a unique structural design and installation scheme. The dustproof bushing 14 has a special structure with a cylindrical body 141 and a raised edge 142. The cylindrical body 141 is used to fit between the connecting shaft 13 and the bushing portion, achieving precise positioning and fit; the raised edge 142 can be clamped between the bushing portions in the axial direction. This structural design makes the installation of the dustproof bushing 14 more stable and the sealing effect better. Compared with the loose and simple dustproof structures in the prior art, this application constructs a more compact and efficient dustproof system through the innovative structure and installation method of the dustproof bushing 14.

[0041] Thus, the hinge structure 1 of this application, thanks to the special structure and installation scheme of the dustproof bushing 14, achieves excellent technical results. The cylindrical body 141 is fitted between the connecting shaft 13 and the bushing portion, forming an annular dustproof barrier, effectively preventing dust from entering through the gap between the bushing and the connecting shaft 13; while the protruding edge 142 is sandwiched between the bushing portions, further enhancing the axial sealing performance of the dustproof bushing 14, preventing the gap from widening due to door opening and closing vibrations, thereby reducing the possibility of dust intrusion. When the door is closed, the tight structure formed by the dustproof bushing 14 and other components can minimize dust penetration at the gaps; during the opening and closing of the door, the firmly installed dustproof bushing 14 can also continuously play a dustproof role, effectively controlling dust pollution caused by airflow. Compared with the prior art, the hinge structure 1 of this application significantly improves dustproof performance, better maintains the clean environment of the cleanroom, reduces product quality problems caused by dust, and provides a solid guarantee for high-precision production.

[0042] Considering the specific installation scheme of the dustproof bushing 14 and each bushing part structure, in the hinge structure 1 provided in this application embodiment, the third bushing part 122 is located between the first bushing part 112 and the second bushing part 113. The third bushing part 122 includes a first end 1221 and a second end 1222. Two dustproof bushings 14 are provided. One dustproof bushing 14 is located between the first end 1221 and one first bushing part 112, and the other dustproof bushing 14 is located between the second end 1222 and the second bushing part 113.

[0043] The existing hinge structure 1 of cleanroom tooling equipment typically has a relatively simple bushing layout, and dust prevention measures are mostly single-point protection, making it difficult to form a comprehensive and effective dust prevention system. Although some hinges have dust prevention components, their quantity and installation positions lack scientific planning, making it impossible to provide targeted protection for critical gaps. However, the hinge structure 1 of this application has achieved a major breakthrough in bushing layout and dustproof bushing 14 installation. The third bushing part 122 is innovatively set between the first bushing part 112 and the second bushing part 113, constructing a completely new bushing layout architecture; at the same time, two dustproof bushings 14 are configured, which are precisely installed between the first end 1221 of the third bushing part 122 and the first bushing part 112, and between the second end 1222 and the second bushing part 113, respectively. Compared with the fragmented and inefficient dust prevention structure of the prior art, this application forms a comprehensive and multi-layered dust prevention structure system through the optimization of bushing layout and the precise deployment of dustproof bushings 14.

[0044] Thus, the hinge structure 1 of this application, with its unique bushing layout and dustproof bushing 14 installation scheme, achieves superior technical effects. The two dustproof bushings 14 act on key connection points, acting like two robust dustproof lines at the core gaps of the hinge, greatly enhancing the overall sealing performance of the hinge. When the door is closed, the dustproof bushings 14 tightly fit against each bushing portion, effectively sealing any possible tiny gaps and preventing dust penetration. During the opening and closing of the door, even under vibration or airflow, the dual protection of the double dustproof bushings 14 continues to function stably, preventing dust from entering the tooling equipment from the bushing connection points. Compared with the prior art, the hinge structure 1 of this application significantly improves dustproof performance, greatly reduces product quality risks caused by dust contamination, effectively ensures the cleanliness of the production environment in cleanrooms, and provides reliable technical support for high-precision, high-requirement production operations.

[0045] Considering the specific installation scheme of the connecting shaft 13, in the hinge structure 1 provided in this application embodiment, the connecting shaft 13 includes an optical shaft portion 131 and a shaft end portion 132. The shaft end portion 132 is located at the top of the optical shaft portion 131. Along its own radial direction, the shaft end portion 132 protrudes from the optical shaft portion 131 and is used to abut and limit the end face of a first bushing portion 112. The side of the optical shaft portion 131 away from the shaft end portion 132 has a limiting groove 1311. The hinge structure 1 also includes a retaining ring 15, which matches and engages with the limiting groove 1311 and is used to abut and limit the end face of the second bushing portion 113.

[0046] In existing hinge structures 1 of cleanroom tooling equipment, the design of the connecting shaft 13 is often relatively simple, usually serving only as a basic component for hinge rotation connection, lacking an effective limiting structure. This makes the door prone to loosening and displacement during frequent opening and closing, and also fails to provide a good seal for the bushing, making it difficult to meet high-precision dustproof requirements. However, the hinge structure 1 of this application embodiment achieves an innovative breakthrough in the design and installation of the connecting shaft 13. The connecting shaft 13 is specially provided with a smooth shaft portion 131 and a shaft end portion 132. The shaft end portion 132 protrudes radially from the smooth shaft portion 131 and abuts against and limits the end face of the first bushing portion 112. The side of the smooth shaft portion 131 away from the shaft end portion 132 is provided with a limiting groove 1311 that matches and engages with the retaining ring 15. The retaining ring 15 abuts against and limits the end face of the second bushing portion 113. Compared to the single connecting shaft 13 structure in the prior art, this application constructs a complete and precise connecting shaft 13 limiting and installation system through the combined design of shaft end 132, limiting groove 1311 and retaining ring 15, which is significantly different from the prior art in terms of structural composition.

[0047] Thus, the hinge structure 1 of this application, based on the special design and installation scheme of the connecting shaft 13, can achieve significant technical effects. The contact and limiting of the shaft end 132 with the first bushing 112, and the contact and limiting of the retaining ring 15 with the limiting groove 1311 and the second bushing 113, ensure that the connecting shaft 13 is doubly and stably limited in the axial direction, effectively preventing axial movement of the door during opening and closing, and greatly improving the stability and reliability of the door's rotating connection. Simultaneously, this precise limiting installation method ensures a tight fit between each bushing and the connecting shaft 13, further reducing gaps and enhancing the overall sealing of the hinge structure 1 in conjunction with components such as the dustproof bushing 14. When the door is frequently opened and closed, the stable connecting shaft 13 structure effectively avoids additional gaps caused by loosening, thereby preventing dust from entering the tooling equipment and better maintaining the clean environment of the cleanroom. Compared with the prior art, the hinge structure 1 of this application not only improves the stability of the door connection, but also significantly enhances the dustproof performance, reduces the defect rate of products caused by dust contamination, and provides a strong guarantee for high-precision production.

[0048] To ensure a dust-free structure, in the hinge structure 1 provided in this application embodiment, the shaft end 132 is made of nylon material, and the dustproof bushing 14 is made of nylon material.

[0049] In this way, both the shaft end 132 and the dustproof bushing 14 are made of nylon, achieving several significant technical benefits. Nylon possesses excellent wear resistance and self-lubricating properties. Using nylon for the shaft end 132 effectively reduces frictional wear when it comes into contact with the end face of the bushing during frequent opening and closing of the door, preventing the generation of debris due to metal-to-metal friction and thus preventing these debris from becoming a source of pollution affecting the cleanroom environment. Simultaneously, the stable wear resistance ensures that the shaft end 132 maintains a precise limiting effect over a long period, maintaining the stability of the door connection and ensuring that the hinge structure 1 is always in a tightly fitted state, thereby better preventing dust from entering.

[0050] The dustproof bushing 14 is made of nylon. Due to its excellent flexibility and sealing properties, it can tightly fit the connecting shaft 13 and the bushing part, effectively filling gaps and further enhancing the dustproof effect. Nylon also has good chemical stability, making it less likely to react with chemicals that may be present in the workshop. In complex cleanroom environments, it can maintain stable dustproof performance for a long time, reducing sealing failure caused by material aging and corrosion, and effectively ensuring the cleanliness of the cleanroom. Furthermore, the use of nylon reduces the overall weight of the hinge structure 1, lowering the resistance to door opening and closing, improving ease of operation, and extending the service life of the hinge structure 1, reducing maintenance costs and providing more reliable and economical technical support for high-precision production.

[0051] Considering the opening and closing angle schemes of the two hinges, in the hinge structure 1 provided in this application embodiment, the rotation angle range between the fixed hinge side 11 and the movable hinge side 12 is 90°-180°.

[0052] By limiting the rotation angle between the fixed hinge side 11 and the movable hinge side 12 to 90°-180°, multi-dimensional technical improvements can be achieved. In practical applications, compared to the single opening angle of traditional hinges, this angle range gives the door opening and closing operation greater flexibility and adaptability. When it is necessary to move large materials or perform equipment maintenance, the door can be fully opened to 180° to maximize the opening space, facilitating the entry and exit of personnel and equipment and improving work efficiency. In daily use, the door opening angle can be flexibly adjusted to any angle between 90°-180°, which can meet the needs of ventilation and observation, and effectively control the airflow range generated by the door opening, reducing the risk of dust being carried into the tooling equipment by air disturbance.

[0053] Furthermore, the precisely defined rotation angle range ensures that all components remain in a stable, coordinated state during the opening and closing of the door. The controllable door opening angle, combined with components such as the dustproof bushing 14 and the specially structured bushing, better maintains the sealing performance of the hinge structure 1. Whether in a slightly open position or fully extended at 180°, the gap between the door and the hinge structure 1 is effectively controlled, further enhancing dustproof performance and ensuring that the cleanliness of the cleanroom is not affected by the door's opening and closing operations. This rotation angle design improves ease of use while providing more reliable dustproof protection for high-precision production environments, effectively reducing quality problems caused by dust contamination and improving production efficiency.

[0054] Considering the dust-free structural scheme of the movable hinge side 12 and the fixed hinge side 11, in the hinge structure 1 provided in this application embodiment, the first bushing portion 112 will not protrude from the second surface 1112, and the third bushing portion 122 will not protrude from the third surface 1211.

[0055] In this way, by ensuring that the first bushing portion 112 does not protrude from the second surface 1112 of the fixed hinge side 11 and the third bushing portion 122 does not protrude from the third surface 1211 of the movable hinge side 12, the following significant dust-free technology effects can be achieved: On the one hand, this structural design allows the outer surfaces (second surface 1112, third surface 1211) of the fixed hinge side 11 and the movable hinge side 12 to remain flat and smooth, avoiding the uneven surface structure formed by the outward protrusion of the bushing portion in traditional hinges. This smoothing design can effectively reduce the turbulence effect generated by airflow on the door surface, reducing the risk of dust particles being carried by turbulent airflow adhering to or accumulating in the gaps around the bushing portion. For example, when the door is closed, the flat surface combined with the stepped surface structure can form a continuous and tight dust barrier, preventing dust from entering the tooling equipment from the junction of the bushing portion and the door surface.

[0056] On the other hand, the design of the bushing being hidden inside the door surface allows the door's own structure to physically shield the bushing connection. Even during the opening and closing of the door, when the movable hinge side 12 rotates closer to the fixed hinge side 11, the protruding bushing is eliminated, resulting in a smoother relative movement trajectory between the door surfaces and further reducing the dynamic gaps caused by component movement. This structure, combined with the sealing effect of the dustproof bushing 14, reduces the path for dust to enter the core connection area of ​​the hinge from the source, significantly improving the dustproof level of tooling equipment in cleanrooms. It is especially suitable for production scenarios highly sensitive to micro-dust contamination, such as electronics and semiconductors, effectively reducing quality problems such as short circuits and defects caused by dust particles, and ensuring the stability and reliability of high-precision production.

[0057] This application embodiment also provides a door assembly 2, including the hinge structure 1 described above, and further including a frame 21, a protective door 22 and a protective cover 23. The fixed hinge side 11 is detachably connected to the outer side of the frame 21, the movable hinge side 12 is detachably connected to the inner side of the protective door 22, and the protective cover 23 covers the outer side of the frame 21 and fits snugly against the protective door 22 so that the hinge structure 1 is not exposed.

[0058] This achieves multiple significant technical benefits. The fixed hinge side 11 and the movable hinge side 12 of the hinge structure 1 are detachably connected to the frame 21 and the protective door 22, respectively. This connection method not only facilitates the installation and disassembly of the door assembly 2, but also allows for quick separation of the components during later maintenance or replacement, significantly reducing maintenance and time costs. At the same time, the detachable connection ensures a tight and stable fit between the components, effectively reducing gaps caused by loose connections and lowering the risk of dust entering the tooling equipment.

[0059] The protective cover 23 is installed on the outer side of the frame 21 and fits snugly against the protective door 22, completely enclosing the hinge structure 1 and preventing it from being exposed. On the one hand, this prevents external dust and debris from directly contacting the hinge structure 1, reducing wear caused by dust accumulation and extending its service life. On the other hand, the completely enclosed structure forms an additional dust barrier. Even if a small amount of airflow occurs during the opening and closing of the protective door 22, the protective cover 23 can effectively block dust, further improving the dustproof performance of the door assembly 2 and ensuring the clean environment of the cleanroom. In addition, the snug fit between the protective cover 23 and the protective door 22 makes the overall appearance of the door assembly 2 more regular, reducing the risk of collisions caused by protruding parts, providing reliable protection for high-precision and high-cleanliness production operations, reducing the probability of product quality problems caused by dust contamination, and improving production efficiency and product qualification rate.

[0060] Considering the dust-free installation scheme of the hinge structure 1 in the door body, in the door assembly 2 provided in this application embodiment, the fixed hinge side 11 is installed on the outer side of the frame 21 through the second surface 1112 of the first flat part 111, and the movable hinge side 12 is installed on the inner side of the protective door 22 through the fourth surface 1212 of the second flat part 121.

[0061] In this way, the fixed hinge side 11 is mounted on the outer side of the frame 21 via the second surface 1112 of the first flat portion 111, and the movable hinge side 12 is mounted on the inner side of the protective door 22 via the fourth surface 1212 of the second flat portion 121. This installation scheme can achieve excellent dust-free technology effects. Since the first flat portion 111 and the second flat portion 121 can form a 180° angle and a stepped surface structure when the hinge is closed, using these two flat surfaces as mounting surfaces allows the frame 21 and the protective door 22 to fit tightly when closed, significantly reducing the connection gap between the two and effectively preventing external dust from entering the tooling equipment through the mounting part.

[0062] During the opening and closing of the door, based on this installation scheme, when the movable hinge side 12 rotates closer to the first surface 1111, the relative movement between the protective door 22 and the frame 21 is smoother, and the airflow is rationally guided, preventing dust from being carried in by strong air vortices generated by the door movement. Simultaneously, the flat mounting surface, together with the dustproof bushing 14 and other components, further enhances the sealing performance at the connection between the hinge structure 1 and the door. Compared to traditional installation methods, this scheme optimizes the dustproof performance of the door assembly 2 from the installation perspective, ensuring that the high cleanliness standards of the cleanroom are maintained even under frequent door opening and closing operations, reducing the defect rate of products due to dust contamination, providing reliable protection for industries with stringent cleanliness requirements such as electronics and pharmaceuticals, while also improving the overall stability and service life of the door assembly 2.

[0063] In summary, when the fixed hinge side 11 and the movable hinge side 12 are in a closed state, the angle between the first flat portion 111 and the second flat portion 121 is 180°, and a stepped surface is formed between the first flat portion 111, the first bushing, and the second flat portion 121. This unique structural design allows for a tight fit, greatly reducing gaps. Dust particles are unlikely to enter the tooling equipment through narrow and irregular gaps, effectively providing the equipment with a layer of tight dustproof armor, preventing dust carried by the outside air from intruding and maintaining the cleanliness level of the cleanroom. When the fixed hinge side 11 and the movable hinge side 12 are in an open or closed state, the angle between the second flat portion 121 and the first flat portion 111 is less than 180°, and the movable hinge side 12 rotates closer to the first surface 1111. This movement method allows airflow to be rationally guided and controlled during the opening and closing of the door, preventing a large amount of dust from being brought in due to violent air disturbances. Meanwhile, compared with traditional door structures, the gap changes generated when the door component 2 of this application are more controllable. Even at the moment the door is opened, the possibility of dust entering is greatly reduced, further ensuring the cleanliness of the environment in which the tooling equipment is located in the cleanroom, effectively reducing product quality problems caused by dust, improving production efficiency and product competitiveness, and providing reliable protection for the production of industries with strict cleanliness requirements such as electronics, pharmaceuticals, and semiconductors.

[0064] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0065] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0066] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hinge structure, characterized in that, include: The fixed hinge side (11) includes a first flat portion (111), a first bushing portion (112) and a second bushing portion (113). The first flat portion (111) includes a first surface (1111) and a second surface (1112). The first bushing portion (112) and the second bushing portion (113) are spaced apart on one side of the first flat portion (111). The first bushing portion (112) extends along the normal direction of the first flat portion (111) and curls toward the first flat portion (111). The movable hinge side (12) includes a second flat portion (121) and a third bushing portion (122). The second flat portion (121) includes a third surface (1211) and a fourth surface (1212). The third bushing portion (122) is disposed on one side of the second flat portion (121). The third bushing portion (122) extends along the normal direction of the second flat portion (121) and curls toward the second flat portion (121). A connecting shaft (13) passes sequentially through the first bushing (112), the second bushing (113), and the third bushing (122) to rotatably connect the fixed hinge side (11) and the movable hinge side (12). The first surface (1111) of the fixed hinge side (11) is disposed opposite to the fourth surface (1212) of the movable hinge side (12). A dustproof bushing (14) is sleeved between the connecting shaft (13) and the first bushing portion (112), or the dustproof bushing (14) is sleeved between the connecting shaft (13) and the second bushing portion (113), or the dustproof bushing (14) is sleeved between the connecting shaft (13) and the third bushing portion (122). Along its own axial direction, at least a portion of the structure of the dustproof bushing (14) is sandwiched between the first bushing portion (112) and the second bushing portion (113), or at least a portion of the structure of the dustproof bushing (14) is sandwiched between the second bushing portion (113) and the third bushing portion (122). In the closed state, the angle between the first planar part (111) and the second planar part (121) is 180°. The first planar part (111) and the second planar part (121) are respectively disposed on both sides of the connecting shaft (13), and a stepped surface is formed between the first planar part (111), the first bushing and the second planar part (121). When in the open / closed state, the angle between the second planar portion (121) and the first planar portion (111) is less than 180°, and the movable hinge side (12) rotates close to the first surface (1111).

2. The hinge structure according to claim 1, characterized in that, The dustproof bushing (14) includes a cylindrical body (141) and a protruding edge (142) protruding from one end face of the cylindrical body (141); The dustproof bushing (14) is sleeved between the connecting shaft (13) and the first bushing part (112) through the cylindrical body (141), and / or the dustproof bushing (14) is sleeved between the connecting shaft (13) and the second bushing part (113) through the cylindrical body (141); Along the axial direction, the dustproof bushing (14) is sandwiched between the first bushing portion (112) and the second bushing portion (113) by the protruding edge portion (142).

3. The hinge structure according to claim 2, characterized in that, The third bushing portion (122) is located between the first bushing portion (112) and the second bushing portion (113). The third bushing portion (122) includes a first end (1221) and a second end (1222). Two dustproof bushings (14) are provided. One dustproof bushing (14) is located between the first end (1221) and one of the first bushing portions (112), and the other dustproof bushing (14) is located between the second end (1222) and the second bushing portion (113).

4. The hinge structure according to claim 3, characterized in that, The connecting shaft (13) includes an optical shaft portion (131) and a shaft end portion (132). The shaft end portion (132) is located at the top of the optical shaft portion (131). Along its own radial direction, the shaft end portion (132) protrudes from the optical shaft portion (131) and is used to abut and limit the end face of a first bushing portion (112). The side of the optical shaft portion (131) away from the shaft end portion (132) has a limiting groove (1311). The hinge structure (1) also includes a retaining ring (15). The retaining ring (15) matches and engages with the limiting groove (1311) and is used to abut and limit the end face of the second bushing portion (113).

5. The hinge structure according to claim 4, characterized in that, The shaft end (132) is made of nylon.

6. The hinge structure according to claim 1, characterized in that, The dustproof bushing (14) is made of nylon.

7. The hinge structure according to claim 1, characterized in that, The rotation angle between the fixed hinge side (11) and the movable hinge side (12) is in the range of 90°-180°.

8. The hinge structure according to claim 1, characterized in that, The first bushing portion (112) is not protruding from the second surface (1112), and the third bushing portion (122) is not protruding from the third surface (1211).

9. A door assembly, characterized in that, The hinge structure (1) as described in any one of claims 1-8 further includes a frame (21), a protective door (22), and a protective cover (23). The fixed hinge side (11) is detachably connected to the outer side of the frame (21), the movable hinge side (12) is detachably connected to the inner side of the protective door (22), and the protective cover (23) covers the outer side of the frame (21) and fits snugly against the protective door (22) so that the hinge structure (1) is not exposed.

10. The door assembly according to claim 9, characterized in that, The fixed hinge side (11) is mounted on the outer side of the frame (21) via the second surface (1112) of the first flat part (111), and the movable hinge side (12) is mounted on the inner side of the protective door (22) via the fourth surface (1212) of the second flat part (121).

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