An adjustable fastener and fastening system

Abstract

The utility model provides a kind of adjustable fastener and fastening system, it is related to mechanical assembly technical field, and adjustable fastener is used to install spare to be assembled on fixed plate;Adjustable fastener includes backplate, nut, clamping plate and countersunk screw;Clamping plate is located between spare to be installed and fixed plate;Clamping plate and backplate are detachably clamped together;Nut is fixedly arranged on the side surface of backplate away from clamping plate;Countersunk screw is sequentially penetrated clamping plate and backplate and cooperates with nut;Wherein, when backplate and clamping plate are located in clamped state, the clamping space for clamping fixed plate is formed between backplate and clamping plate.The utility model passes through the combination structure of backplate and clamping plate, both realizes stepless regulation in two-dimensional plane, also breaks through the limitation of installation position, and installation positioning can be realized in any plane position, solves the problem that traditional scheme is limited by edge installation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly technology, and more specifically, to an adjustable fastener and fastening system. Background Technology

[0002] In the field of mechanical assembly, especially in industries such as automotive, aerospace, and electronic equipment, it is often necessary to connect two or more components using fasteners. Due to factors such as manufacturing errors, cumulative assembly tolerances, or thermal expansion and contraction, the mounting holes on mating components are often difficult to align perfectly, which brings great difficulties to the assembly work.

[0003] To address the aforementioned issues, various adjustable fastening solutions have been disclosed in the prior art. One such solution employs a clamping nut with an elongated hole. Specifically, an elongated hole is made on one component, and a rectangular hole in a vertical direction is made on another component, where a clamping nut is installed, and finally, a standard bolt is used for connection. While this solution allows for positional adjustment in a single direction, its degree of freedom is limited. Another prior art, such as the "Adjustable Folding Fastener" disclosed in Chinese Patent Application No. 201020237210X, uses a snap-fit ​​method to pre-install the nut on the edge of the component. This solution facilitates assembly to some extent, but its application scenarios are severely limited. It must rely on the edge structure of the component for installation and cannot be used in any position in the middle of the component or far from the edge, resulting in poor versatility. Therefore, a novel fastening solution is urgently needed. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable fastener and fastening system to achieve free adjustment in a two-dimensional plane, thereby improving the convenience, reliability and applicability of installation.

[0005] To solve the above problems, this utility model provides an adjustable fastener and fastening system.

[0006] In a first aspect, this utility model provides an adjustable fastener for assembling a component to be installed onto a fixing plate; the adjustable fastener includes a back plate, a nut, a snap-fit ​​plate, and a countersunk screw; the snap-fit ​​plate is located between the component to be installed and the fixing plate; the snap-fit ​​plate and the back plate are detachably snap-fitted together; the nut is fixedly disposed on the side surface of the back plate opposite to the snap-fit ​​plate; the countersunk screw passes through the snap-fit ​​plate and the back plate in sequence and engages with the nut; When the back plate and the snap-fit ​​plate are in the snap-fit ​​state, a clamping space for clamping the fixing plate is formed between the back plate and the snap-fit ​​plate; the adjustable fastener is configured to slide relative to the fixing plate in a two-dimensional plane and will not detach from the fixing plate.

[0007] The beneficial effects of the adjustable fastener of this utility model are: During assembly, a snap-fit ​​plate is pre-installed between the fixing plate and the part to be installed. The back plate is connected to the snap-fit ​​plate via a snap-fit ​​structure to form a clamping space. A countersunk screw passes through a through hole on the part to be installed, a through hole on the snap-fit ​​plate, a through hole on the fixing plate, and a hole on the back plate before being screwed into a nut. In the incompletely tightened state, the back plate and snap-fit ​​plate can slide along the surface of the fixing plate. When adjusted to the target position, the countersunk screw is fully tightened. At this point, the clamping space generates a clamping force on the fixing plate, and the threaded engagement of the nut and screw creates an axial locking force, achieving fixation. The detachable nature of the snap-fit ​​structure allows for quick separation of the back plate and snap-fit ​​plate during maintenance. This invention, through the combination structure of the back plate and snap-fit ​​plate, achieves stepless adjustment in a two-dimensional plane and overcomes the limitations of installation position, enabling installation and positioning at any planar location, solving the problem of traditional solutions being limited to edge installation. The two-dimensional sliding adjustment function effectively compensates for multi-directional positional deviations, significantly improving assembly accuracy. The detachable snap-fit ​​structure simplifies the disassembly and assembly process, facilitating subsequent maintenance and adjustment.

[0008] Optionally, the back plate is provided with a snap-fit ​​groove, and the snap-fit ​​plate is provided with a snap-fit ​​hook part that matches the snap-fit ​​groove on the side near the back plate. The snap-fit ​​hook part is hooked into the snap-fit ​​groove to realize the snap-fit ​​engagement between the back plate and the snap-fit ​​plate.

[0009] Optionally, the mating surfaces of the snap-fit ​​groove and the snap-fit ​​hook are provided with a textured structure.

[0010] Optionally, a spring is provided at the end of the snap-fit ​​hook; when the back plate and the snap-fit ​​plate are in the snap-fit ​​state, the spring is located outside the snap-fit ​​groove and abuts against the opening of the snap-fit ​​groove.

[0011] Optionally, an adjustment hole is provided in the middle of the fixing plate; when the back plate and the snap-fit ​​plate are in the snap-fit ​​state, the snap-fit ​​hook passes through the adjustment hole and is located in the snap-fit ​​groove; the position of the snap-fit ​​hook in the adjustment hole is adjustable.

[0012] Optionally, the adjustment hole is a round hole or a cross-shaped hole.

[0013] Optionally, the backplate and / or snap-fit ​​plate may be made of any of the following materials: spring steel, stainless steel, and aluminum alloy.

[0014] Alternatively, the nut is fixed to the central area of ​​the back plate by projection welding, spot welding, or laser welding.

[0015] Optionally, anti-slip textures are provided on both sides of the back plate and the snap-fit ​​plate.

[0016] Secondly, this utility model provides a fastening system, including a fixing plate, a component to be installed, and adjustable fasteners. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the adjustable fastener after assembly according to an embodiment of the present utility model; Figure 2 This is an exploded view of the adjustable fastener according to an embodiment of the present invention. Figure 3 This is a cross-sectional structural diagram of the adjustable fastener according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Countersunk screw; 2. Part to be installed; 3. Clip plate; 31. Clip hook; 4. Fixing plate; 41. Adjustment hole; 5. Back plate; 51. Clip groove; 6. Nut. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0020] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] like Figure 1-3As shown in the figure, an adjustable fastener provided in this embodiment of the present invention is used to assemble a component 2 to be installed onto a fixing plate 4. The adjustable fastener includes a back plate 5, a nut 6, a snap-fit ​​plate 3, and a countersunk screw 1. The snap-fit ​​plate 3 is located between the component 2 to be installed and the fixing plate 4. The snap-fit ​​plate 3 and the back plate 5 are detachably snap-fitted together. The nut 6 is fixedly disposed on the surface of the back plate 5 away from the snap-fit ​​plate 3. The countersunk screw 1 passes through the snap-fit ​​plate 3 and the back plate 5 in sequence and engages with the nut 6. When the back plate 5 and the snap-fit ​​plate 3 are in the snap-fit ​​state, a clamping space for clamping the fixing plate 4 is formed between the back plate 5 and the snap-fit ​​plate 3. The adjustable fastener can slide relative to the fixing plate 4 in a two-dimensional plane and will not detach from the fixing plate 4.

[0023] In this design, the back plate 5 refers to the metal base plate that supports the nut 6, which can be made of stamped steel plate with a thickness of 0.8-1.5 mm to balance strength and weight. The snap-fit ​​plate 3 is a connecting component with a snap-fit ​​function, and its edges can be equipped with elastic snap-fit ​​structures. The nut 6 is a threaded connector that mates with the countersunk screw 1, and can be a hexagonal nut 6 fixed to the center area of ​​the back plate 5 by welding. The countersunk screw 1 is a fastening screw with a tapered head, and can be a standard part of M4-M8 specifications for versatility. The clamping space refers to the gap formed between the opposing surfaces of the back plate 5 and the snap-fit ​​plate 3, and its height can be 1-3 mm to accommodate fixing plates 4 of different thicknesses.

[0024] Specifically, during assembly, the snap-fit ​​plate 3 is pre-installed between the fixing plate 4 and the part to be installed 2. The back plate 5 is connected to the snap-fit ​​plate 3 via a snap-fit ​​structure to form a clamping space. The countersunk screw 1 passes through the through holes on the part to be installed 2, the snap-fit ​​plate 3, the fixing plate 4, and the back plate 5, and is then screwed into the nut 6. In the incompletely tightened state, the back plate 5 and the snap-fit ​​plate 3 can slide along the surface of the fixing plate 4. When adjusted to the target position, the countersunk screw 1 is fully tightened. At this time, the clamping space generates a clamping force on the fixing plate 4, and at the same time, the threaded engagement of the nut 6 and the screw forms an axial locking force, achieving double fixation. The detachable nature of the snap-fit ​​structure allows for quick separation of the back plate 5 and the snap-fit ​​plate 3 during maintenance.

[0025] It should be noted that, please refer to Figure 2 The through holes on the component to be installed 2, the through holes on the snap-fit ​​plate 3, the through holes on the fixing plate 4, and the through holes on the back plate 5 need to meet certain conditions. For example, the through holes on the fixing plate 4 are used to adjust the position of the fasteners, so the diameter of the through holes needs to be larger. At the same time, in order to prevent the snap-fit ​​plate 3 and the back plate 5 from passing through the through holes of the fixing plate 4 during the adjustment process, the dimensions of the snap-fit ​​plate 3 and the back plate 5 need to be set according to the actual situation.

[0026] This embodiment, through the combination structure of the back plate 5 and the snap-fit ​​plate 3, not only achieves stepless adjustment in a two-dimensional plane, but also breaks through the limitation of installation position, enabling installation and positioning at any plane position, thus solving the problem of traditional solutions being limited to edge installation; the two-dimensional sliding adjustment function effectively compensates for positional deviations in multiple directions, significantly improving assembly accuracy; the detachable snap-fit ​​structure simplifies the disassembly and assembly process, facilitating later maintenance and adjustment.

[0027] Optionally, the back plate 5 is provided with a snap-fit ​​groove 51, and the snap-fit ​​plate 3 is provided with a snap-fit ​​hook 31 that is adapted to the snap-fit ​​groove 51 on the side near the back plate 5. The snap-fit ​​hook 31 is hooked into the snap-fit ​​groove 51 to realize the snap-fit ​​engagement between the back plate 5 and the snap-fit ​​plate 3.

[0028] The snap-fit ​​groove 51 refers to the groove structure opened on the surface of the back plate 5, which can be formed by stamping or milling, and is used to accommodate the snap-fit ​​hook 31 and restrict its displacement direction. The snap-fit ​​hook 31 refers to the bent protrusion formed by the extension of the edge of the snap-fit ​​plate 3, which can be made by bending process, and its shape matches the snap-fit ​​groove 51 to achieve hook locking.

[0029] Specifically, the back plate 5 and the snap-fit ​​plate 3 are detachably connected through the engagement of the snap-fit ​​groove 51 and the snap-fit ​​hook 31. When the snap-fit ​​hook 31 is inserted into the snap-fit ​​groove 51, a gap is formed between the back plate 5 and the snap-fit ​​plate 3 to hold the fixing plate 4. At this time, the countersunk screw 1 passes through the snap-fit ​​plate 3 and engages with the nut 6 on the back plate 5 to fix the part to be installed 2 in the clamping space. The hook structure of the snap-fit ​​hook 31 and the snap-fit ​​groove 51 allows the back plate 5 and the snap-fit ​​plate 3 to slide relative to each other in a two-dimensional plane, while preventing them from accidentally separating. This achieves stepless adjustment of the fastener in a two-dimensional plane and ensures that the back plate 5 and the snap-fit ​​plate 3 always maintain a reliable connection during assembly, avoiding accidental separation due to vibration or external force.

[0030] Optionally, the mating surfaces of the snap-fit ​​groove 51 and the snap-fit ​​hook 31 are provided with a textured structure.

[0031] The textured structure refers to the surface irregularities formed through machining, specifically achieved through knurling, striped indentation, or dot-like protrusions. This structure increases the roughness of the contact surface, thereby enhancing the friction between the locking groove 51 and the locking hook 31. The mating surface refers to the area where the inner wall of the locking groove 51 directly contacts the outer wall of the locking hook 31, which can be achieved by limiting the contact area ratio or adjusting the texture distribution density. This design ensures that the locking engagement maintains relative positional stability even under external forces.

[0032] Specifically, when the snap hook 31 is inserted into the snap groove 51, the micro-interlocking effect generated by the textured structure effectively suppresses unintended displacement between the two. When the fixed plate 4 is subjected to vibration or lateral load, the snap groove 51 and the snap hook 31 form a self-locking effect through the mechanical interlocking action of the textured structure, thereby preventing the snap-fit ​​from loosening due to external forces. This structure enhances the anti-displacement capability after assembly while maintaining the two-dimensional planar adjustment function, effectively preventing unintended displacement of the snap-fit ​​under dynamic working conditions, ensuring that the adjusted assembly position remains stable, solving the problem of repeated calibration caused by loosening of the snap-fit ​​structure in existing adjustable fasteners, and improving the reliability of the assembly system.

[0033] Optionally, a spring piece is provided at the end of the snap hook 31; when the back plate 5 and the snap plate 3 are in the snap-fit ​​state, the spring piece is located outside the snap groove 51 and abuts against the opening of the snap groove 51.

[0034] The spring clip refers to a sheet-like structure with elastic deformation capability located at the end of the latching hook 31. It can be made of thin metal sheet or engineering plastic. The elastic deformation generates a reverse force to maintain the contact state between the latching hook 31 and the latching groove 51. The groove opening abutment of the latching groove 51 means that the contact surface between the spring clip and the edge of the latching groove 51 forms a physical limit. This can be achieved by setting a chamfer or protrusion structure at the groove opening, and by friction or mechanical interference, it prevents the latching hook 31 from accidentally disengaging.

[0035] Specifically, when the snap hook 31 is inserted into the snap groove 51, the spring piece undergoes elastic deformation due to the pressure from the side wall of the snap groove 51, and rebounds to its initial state after being fully engaged. At this time, the outer surface of the spring piece forms surface contact with the edge of the snap groove 51. Under vibration or external force, the spring piece continuously applies pressure through its own elasticity, preventing relative displacement between the snap hook 31 and the snap groove 51, while allowing the back plate 5 and the snap plate 3 to slide and adjust in a two-dimensional plane.

[0036] Optionally, the fixing plate 4 has an adjustment hole 41 in the middle; when the back plate 5 and the snap-fit ​​plate 3 are in the snap-fit ​​state, the snap-fit ​​hook 31 passes through the adjustment hole 41 and is located in the snap-fit ​​groove 51; the position of the snap-fit ​​hook 31 in the adjustment hole 41 is adjustable.

[0037] The adjustment hole 41 refers to a through hole located in the middle of the fixed plate 4. It can be a round hole or a cross-shaped hole, with a diameter larger than the cross-sectional size of the snap-fit ​​hook 31, allowing the snap-fit ​​hook 31 to be adjusted within the hole. The adjustable position means that the engagement between the snap-fit ​​hook 31 and the adjustment hole 41 allows movement along the length or width of the hole. This can be achieved by setting the adjustment hole 41 to a long strip or cross-shaped structure, allowing the clamping space formed by the back plate 5 and the snap-fit ​​plate 3 to be adjusted in a two-dimensional plane relative to the fixed plate 4.

[0038] Specifically, during assembly, the snap-fit ​​hook 31 passes through the adjustment hole 41 of the fixing plate 4 and forms a hook engagement with the snap-fit ​​groove 51 of the back plate 5. Since the size of the adjustment hole 41 is larger than the cross-section of the snap-fit ​​hook 31, the snap-fit ​​hook 31 can move along the length or width of the hole within the adjustment hole 41, thereby causing the clamping space formed by the back plate 5 and the snap-fit ​​plate 3 to slide relative to the fixing plate 4. When the countersunk screw 1 is screwed into the nut 6, the snap-fit ​​hook 31 generates friction with the sidewall of the adjustment hole 41, ultimately locking the clamping space in the target position. This structure allows the fastener to be installed without relying on the edge of the fixing plate 4, and positional fine-tuning can be achieved without disassembly during adjustment. In this embodiment, the engagement of the adjustment hole 41 and the snap-fit ​​hook 31 allows the fastener to slide freely in a two-dimensional plane while maintaining connection stability with the fixing plate 4. Furthermore, the limitation of relying on the edge of the component for installation in the prior art is broken, and the design of the adjustment hole 41 being located in the middle of the fixing plate 4 expands the applicability of the fastener. It enables the installation and adjustment of fasteners at any position in the middle of the fixing plate 4, solving the problem of limited scenarios caused by the reliance on edge installation in the existing technology. At the same time, the position adjustment capability in the two-dimensional plane effectively compensates for assembly errors and improves installation accuracy and efficiency.

[0039] Optionally, the backplate 5 and the snap-fit ​​plate 3 may be made of any of the following materials: spring steel, stainless steel, and aluminum alloy.

[0040] Spring steel refers to steel with high elastic limit and good fatigue resistance, which can be achieved through cold rolling or heat treatment processes, and can withstand repeated deformation without plastic failure. Stainless steel refers to an iron-based alloy with a chromium content of not less than 10.5%, and can be achieved through austenitic or martensitic stainless steel, maintaining structural stability in humid or corrosive environments. Aluminum alloy refers to a lightweight alloy based on aluminum with the addition of other elements, which can be achieved through forging or die casting processes, reducing overall weight while maintaining strength.

[0041] Specifically, the back plate 5 and the snap-fit ​​plate 3 are made of one of the following materials: spring steel, stainless steel, or aluminum alloy, allowing for selection based on the specific application. For example, stainless steel is used where corrosion resistance is required, aluminum alloy is used where lightweighting is needed, and spring steel is used where elastic support is required. Through the inherent physical properties of the materials, the back plate 5 and the snap-fit ​​plate 3 can provide appropriate stiffness or elasticity when clamping the fixing plate 4, while preventing material failure due to environmental factors.

[0042] Optionally, the nut 6 is fixed to the central area of ​​the back plate 5 by projection welding, spot welding, or laser welding.

[0043] Among them, projection welding refers to a welding method that fuses the contact surfaces by applying local pressure and electricity. Specifically, it can be achieved by applying pressure and electricity through electrodes, and is suitable for the rapid fixing of metal plates and nuts 6. Spot welding refers to a welding method that forms a weld nugget by applying current to discrete points through electrodes. Specifically, it can be achieved by using double-sided electrodes to perform multi-point welding on the back plate 5 and nut 6 to achieve a local high-strength connection. Laser welding refers to a welding process that uses a high-energy laser beam to melt materials. Specifically, it can be achieved by using a focused laser beam to continuously scan the contact surface of the back plate 5 and nut 6 to form a deep penetration weld. The central region refers to the symmetrical area extending outward from the geometric center of the back plate 5. Specifically, it can be defined as a circular area with a diameter ranging from 20 to 30 mm in the center of the surface of the back plate 5, used to ensure uniform force distribution on the nut 6.

[0044] Specifically, the back plate 5 is formed by stamping metal sheet, and its central area is surface-treated and then connected to the standard nut 6 by welding. During the welding process, the contact surface between the back plate 5 and the nut 6 forms a metallurgical bonding layer under pressure or heat. For example, when using projection welding, the electrode applies vertical pressure to the nut 6 and is energized, causing the contact surface between the back plate 5 and the nut 6 to melt instantly and then cool and solidify. After welding, the axis of the nut 6 remains perpendicular to the plane of the back plate 5, and the center line of its internal thread coincides with the penetration path of the countersunk screw 1. In this embodiment, the nut 6 is fixed to the center of the back plate 5 by welding, which not only eliminates the limitations of edge installation but also avoids the risk of loosening that may occur with threaded connections. At the same time, the metallurgical bonding layer formed by welding can withstand forces in multiple dimensions. This achieves a high-strength connection between the nut 6 and the back plate 5, ensuring that the connection structure does not shift or fail during repeated adjustments. Furthermore, the welding fixing method in the central area allows the fastener to be adapted to fixing plates 4 of different sizes, making it particularly suitable for central installation scenarios far from the edge of the fixing plate 4.

[0045] Optionally, anti-slip textures are provided on both sides of the back plate 5 and the snap-fit ​​plate 3.

[0046] The anti-slip texture refers to a regular or irregular surface texture formed through mechanical processing. Specifically, it can be formed on the metal surface using stamping or laser engraving processes to create diamond-shaped, wavy, or grid-like patterns. This structure increases the coefficient of friction of the contact surface, preventing relative sliding between the back plate 5 and the snap-fit ​​plate 3 when clamping the fixing plate 4.

[0047] Specifically, after the back plate 5 and the snap-fit ​​plate 3 close to form a clamping space, the anti-slip textures on the two contact surfaces engage with the two sides of the fixing plate 4. When the countersunk screw 1 is not fully tightened, the micro-protrusions of the anti-slip textures can limit the accidental displacement of the fastener in the two-dimensional plane; when the countersunk screw 1 is tightened, the inclined structure of the anti-slip textures can guide the fixing plate 4 to produce slight deformation, enhancing the interlocking strength of the contact surfaces. The design of the anti-slip textures can also prevent the screw and nut 6 from rotating the back plate 5 when they are engaged.

[0048] In some specific embodiments, the depth of the anti-slip texture can be 0.1-0.3 mm, and the texture spacing can be 1-2 mm. The anti-slip texture on the back plate 5 can cover the entire contact area, while the anti-slip texture on the snap-fit ​​plate 3 can be concentrated in the annular area corresponding to the edge of the fixing plate 4. This effectively solves the problem of accidental displacement of fasteners during adjustment due to smooth contact surfaces, ensuring the relative positional accuracy of the part to be installed 2 and the fixing plate 4 during assembly. The symmetrical arrangement of the anti-slip texture can balance the stress distribution on both sides of the contact surface, avoiding clamping failure caused by excessive wear on one side.

[0049] This utility model provides a fastening system including a fixing plate 4, a component to be installed 2, and an adjustable fastener as described above.

[0050] The fastening system of this embodiment has the same advantages over the prior art as the adjustable fasteners described above, and will not be repeated here.

[0051] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. An adjustable fastener for assembling a component (2) to be installed onto a fixing plate (4); characterized in that, The adjustable fastener includes a back plate (5), a nut (6), a snap-fit ​​plate (3), and a countersunk screw (1); the snap-fit ​​plate (3) is located between the part to be installed (2) and the fixing plate (4); the snap-fit ​​plate (3) is detachably snapped into the back plate (5); the nut (6) is fixedly disposed on the side surface of the back plate (5) away from the snap-fit ​​plate (3); the countersunk screw (1) is used to pass through the snap-fit ​​plate (3) and the back plate (5) in sequence and cooperate with the nut (6); When the back plate (5) and the snap-fit ​​plate (3) are in a snap-fit ​​state, a clamping space for clamping the fixing plate (4) is formed between the back plate (5) and the snap-fit ​​plate (3), and the part to be installed (2) is pressed against the snap-fit ​​plate (3) by the countersunk screw (1); the adjustable fastener is configured to slide relative to the fixing plate (4) in a two-dimensional plane and will not detach from the fixing plate (4).

2. The adjustable fastener according to claim 1, characterized in that, The back plate (5) is provided with a snap-fit ​​groove (51), and the snap-fit ​​plate (3) is provided with a snap-fit ​​hook (31) on the side near the back plate (5) that is adapted to the snap-fit ​​groove (51). The snap-fit ​​hook (31) is hooked into the snap-fit ​​groove (51) to realize the snap-fit ​​engagement between the back plate (5) and the snap-fit ​​plate (3).

3. The adjustable fastener according to claim 2, characterized in that, The mating surfaces of the snap-fit ​​groove (51) and the snap-fit ​​hook (31) are provided with a textured structure.

4. The adjustable fastener according to claim 2, characterized in that, The end of the snap hook (31) is provided with a spring piece; when the back plate (5) and the snap plate (3) are in the snap-fit ​​state, the spring piece is located outside the snap groove (51) and abuts against the opening of the snap groove (51).

5. The adjustable fastener according to claim 2, characterized in that, The fixing plate (4) has an adjustment hole (41) in the middle; when the back plate (5) and the snap-fit ​​plate (3) are in the snap-fit ​​state, the snap-fit ​​hook (31) passes through the adjustment hole (41) and is located in the snap-fit ​​groove (51); the position of the snap-fit ​​hook (31) in the adjustment hole (41) is adjustable.

6. The adjustable fastener according to claim 5, characterized in that, The adjustment hole (41) is a round hole or a cross-shaped hole.

7. The adjustable fastener according to claim 2, characterized in that, The back plate (5) and / or the snap-fit ​​plate (3) are made of any of the following materials: spring steel, stainless steel and aluminum alloy.

8. The adjustable fastener according to claim 1, characterized in that, The nut (6) is fixed to the central area of ​​the back plate (5) by projection welding, spot welding or laser welding.

9. The adjustable fastener according to any one of claims 1-8, characterized in that, The back plate (5) and the snap-fit ​​plate (3) are provided with anti-slip textures on their two opposite sides.

10. A fastening system, characterized in that, It includes a fixing plate (4), a component to be installed (2), and an adjustable fastener as described in any one of claims 1 to 9.

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