An over-the-wire sensing system fixation device

Abstract

The utility model belongs to the technical field of mine dump truck, concretely relates to a kind of upper layer sensing system fixing device, including support beam, two side plates, connecting beam, front baffle, laser radar support platform, two millimeter wave radar support and two warning light support frame;The utility model forms main body frame by support beam and two side plates, and then structure is reinforced by connecting beam and front baffle, to form the stable three-dimensional structure in common, and panoramic field of view is ensured by laser radar support platform being arranged on the outside of side plate, millimeter wave radar support and warning light support frame are set respectively at the top of support beam both ends, the rational layout and integrated installation of multiple equipment in high position are realized, and the stability of detection range and overall structure under harsh working conditions is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining dump trucks, specifically relating to a fixing device for an upper-level sensing system. Background Technology

[0002] The upper-level perception system of the unmanned wide-body dump truck is the "eye" for the vehicle to achieve autonomous driving and operation. Its function is to use sensors such as lidar and millimeter-wave radar to detect pedestrians, other engineering vehicles (such as loaders and bulldozers), fixed obstacles (such as slopes, piles of rocks, and construction equipment), potholes and uneven road surfaces in real time and from all directions. This allows the system to determine the location, size and movement trend of obstacles, providing data support for the decision-making system and ensuring the safety and efficiency of autonomous driving and operation.

[0003] To reduce blind spots, sensors need to be installed at a higher position; currently, existing technologies typically involve installing the sensing devices directly on the top of the cab.

[0004] However, the limited height of the cab obstructs the sensor's field of vision, making it difficult to achieve full coverage of the surrounding environment and creating a large blind spot. Secondly, direct installation makes it difficult to guarantee the structural stability of the integrated installation of multiple sensors, which can easily affect the perception accuracy and equipment lifespan under bumpy vehicle conditions. Utility Model Content

[0005] The purpose of this invention is to provide a fixing device for an upper-level sensing system, which solves the technical problems in the prior art, such as large detection blind zones caused by insufficient sensor installation height, and structural instability and impact on sensing accuracy and reliability caused by direct installation.

[0006] This utility model discloses a fixing device for an upper-level sensing system, comprising: The supporting beam has a U-shaped cross-section with the opening facing downwards to form a receiving groove; Two side plates are respectively disposed opposite to each other at both ends of the support beam. Each side plate is L-shaped and includes a vertical section and a horizontal section, and the upper part of the vertical section is fixedly embedded in the receiving groove. The connecting beam is installed at both ends on the inner middle of the two side plates respectively; The front baffle is vertically installed between the two vertical sections and located on the side of the vertical section away from the horizontal section, and is parallel to the length direction of the support beam; A lidar support is installed on the outside of one of the aforementioned L-shaped side plates; Two millimeter-wave radar supports are respectively installed at both ends of the top surface of the support beam; Two warning light brackets are respectively installed at both ends of the top surface of the support beam and located between the two millimeter-wave radar supports.

[0007] This application forms the main frame through support beams and two side plates, and then strengthens the structure by connecting beams and front baffles, thus forming a stable three-dimensional structure. By setting the lidar support on the outside of the side plates, a panoramic view is ensured. Millimeter-wave radar supports and warning light brackets are respectively set at both ends of the top of the support beam, realizing the reasonable layout and integrated installation of multiple devices at a high position, effectively improving the detection range and the stability of the overall structure under harsh working conditions.

[0008] Based on the above technical solution, the solution of this application can be further improved as follows: Preferably, the outer peripheral edge of the side plate is provided with a reinforcing flange extending laterally inward, and the reinforcing flange is in contact with the inner surface of the receiving groove. By adopting this solution, the contact area between the side plate and the support beam is increased, the structural rigidity and deformation resistance of the side plate itself are enhanced, and the connection strength between the side plate and the support beam is improved, effectively improving the overall stability and durability of the device.

[0009] Preferably, the two sides of the front baffle along its length are attached and fixed to the inner sides of the two reinforcing flanges. By adopting this solution, the front baffle is effectively integrated into the main frame, which not only enhances its own rigidity but also tightens and stabilizes the two side plates, thereby improving the overall integrity and torsional stiffness of the front end structure of the entire device and optimizing the load distribution.

[0010] Preferably, it includes: Two pads are respectively placed on the outer bottom surface of the two reinforcing flanges; The base plate has two reinforcing flanges on the inner bottom surfaces of the two sides along its length. This design helps to disperse stress, adapt to the installation plane, and reduce vibration, thereby enhancing the overall structural rigidity and providing physical protection against the impact of gravel on the top of the cab.

[0011] Preferably, the base plate has a first folded edge on both sides in the width direction, and the front baffle has a second folded edge on both sides in the width direction. This solution enhances the structural rigidity of the base plate and the front baffle, effectively prevents them from bending and deforming under stress, and improves the structural stability and durability of the entire device.

[0012] Preferably, it includes: The wire harness fixing assembly includes: Multiple first U-shaped rods are laterally spaced on the rear side of the support beam; Multiple second U-shaped rods are laterally spaced on the rear side of the connecting beam; Multiple third U-shaped rods are laterally spaced on the rear side of the lidar support; Multiple fourth U-shaped rods are vertically spaced on the rear side of one of the aforementioned reinforced flanges. This solution provides dedicated fixing points for all sensor cables in a zoned and oriented manner, achieving neat bundling and reliable anchoring of the cable harness. It effectively prevents cable loosening and wear caused by vehicle vibration, improves wiring standardization and system maintenance convenience, and ensures long-term stable operation of the entire system under harsh working conditions.

[0013] Preferably, the side plate has multiple perforations, and the front baffle has multiple ventilation holes. This solution reduces the overall weight of the device and the amount of material used while ensuring structural strength. In addition, the ventilation holes form a through-flow air channel, thereby reducing wind resistance.

[0014] Preferably, the lidar support platform includes: The main body of the bracket is L-shaped and includes mutually perpendicular connecting plates and mounting plates; A diagonal bracing tube is provided between the connecting plate and the mounting plate; Multiple pressure plates are arranged vertically at intervals on the outside of the connecting plate; The connecting plate is attached to the side plate, and the pressure plate, the connecting plate, and the side plate are locked and fixed by multiple sets of bolt assemblies. This solution achieves the close-fitting installation with the side plate and the load-bearing capacity of the lidar, while ensuring the structural vibration resistance and rigidity. Furthermore, the connecting plate and the side plate are firmly clamped by multiple vertically spaced pressure plates and bolt assemblies, forming a reliable locking mechanism and improving the structural stability.

[0015] Preferably, the connecting plate has a third folded edge on both sides in the width direction, and the mounting plate has a fourth folded edge on both sides in the width direction, with the fourth folded edge fitting against the outer side of the third folded edge. This design forms a nested reinforcing structure, which not only greatly enhances the bending resistance of the connecting plate and the mounting plate, but also greatly enhances the structural strength and load-bearing capacity at the corner through the fitting and fixing of the inner and outer folded edges.

[0016] Preferably, the pressure plate has a fifth folded edge on both the upper and lower sides; by adopting this solution, the structural rigidity of the pressure plate is enhanced, making it less prone to bending deformation under the pre-tightening force of the locking bolt, ensuring that the pressure plate can apply a continuous, uniform and stable clamping force, and improving the anti-loosening ability and connection reliability.

[0017] Through the above technical solution, this utility model achieves the following beneficial effects: 1. This application forms the main frame through the support beam and two side plates, and then strengthens the structure by connecting beams and front baffle, thus forming a stable three-dimensional structure. The lidar support is set on the outside of the side plates to ensure a panoramic view. Millimeter-wave radar support and warning light bracket are respectively set at both ends of the top of the support beam, realizing the reasonable layout and integrated installation of multiple devices at a high position, effectively improving the detection range and the stability of the overall structure under harsh working conditions. 2. This application increases the contact area between the side plate and the support beam by strengthening the flange, which greatly enhances the structural rigidity and deformation resistance of the side plate itself, and improves the connection strength between the side plate and the support beam, effectively improving the overall stability and durability of the device. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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.

[0019] Figure 1 This is a perspective view (front view) of the upper-layer sensing system fixing device described in the embodiment of this application. Figure 2 This is a perspective view (rear view) of the upper-layer sensing system fixing device described in the embodiment of this application. Explanation of reference numerals in the attached figures: 1. Support beam; 101. Receiving groove; 2. Side panel; 201. Cutout; 21. Vertical section; 22. Horizontal section; 23. Reinforced flange; 3. Connecting beams; 4. Front baffle; 401. Second folded edge; 402. Ventilation hole; 5. LiDAR support platform; 51. Support body; 511. Connecting plate; 51101. Third fold; 512. Mounting plate; 51201. Fourth fold; 52. Diagonal brace tube; 53. Pressure plate; 5301. Fifth fold; 6. Millimeter-wave radar support; 7. Police light bracket; 8. Pad strips; 9. Base plate; 901. First fold; 10. Wire harness fixing assembly; 1001. First U-shaped rod; 1002. Second U-shaped rod; 1003. Third U-shaped rod; 1004. Fourth U-shaped rod. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the stated features.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0024] Example: like Figure 1 and Figure 2 As shown in the figure, this application discloses an upper-level perception system fixing device, which is used to integrate and reliably fix multiple types of equipment at a high position, thereby significantly improving the vehicle's environmental perception capability and ensuring its autonomous driving and operation safety and efficiency. Its specific structure includes: a support beam 1, two side plates 2, a connecting beam 3, a front baffle 4, a lidar support 5, two millimeter-wave radar supports 6, and two warning light brackets 7.

[0025] The support beam 1 is the foundation for the installation of the top equipment. Its cross-section is U-shaped with the opening facing downwards to form a receiving groove 101, thereby providing good bending and torsional stiffness.

[0026] Two side plates 2 are respectively positioned opposite each other at both ends of the support beam 1, thus forming a stable three-dimensional frame and providing a foundation for the installation of the front baffle 4 and the connecting beam 3. Each side plate 2 is L-shaped and includes a vertical section 21 and a horizontal section 22. The upper part of the vertical section 21 is fixedly embedded in the receiving groove 101, which serves to position the plate and enhance the stability of the connection.

[0027] The two ends of the connecting beam 3 are respectively installed on the inner middle of the two side plates 2, thereby enhancing the structural stability of the entire frame in the left and right directions and improving the frame's resistance to deformation.

[0028] The front baffle 4 is vertically installed between the two vertical sections 21 and is located on the side of the vertical section 21 away from the horizontal section 22. It is parallel to the length direction of the support beam 1, thereby enhancing the structural stability of the entire frame in the front-to-back direction and improving the frame's resistance to deformation. Its plate-like structure also provides potential installation positions for installing other equipment.

[0029] The lidar mount 5 is installed on the outside of an L-shaped side plate 2, which can extend laterally to the upper side of the cab. This allows for direct and unobstructed scanning of the terrain and obstacles on the side wings and in the vicinity of the vehicle, avoiding blind spots in lateral detection caused by vehicle body obstruction, and improving lateral safety and operational accuracy.

[0030] Two millimeter-wave radar supports 6 are respectively installed at both ends of the top surface of the support beam 1, so that the two millimeter-wave radars can form a wider detection angle and better cover the area in front of and to the side of the vehicle.

[0031] Two warning light brackets 7 are respectively installed at both ends of the top surface of the support beam 1 and located between the two millimeter-wave radar supports 6. Their protruding position ensures that the warning lights can be clearly seen by other vehicles and personnel in the surrounding area, thus ensuring operational safety.

[0032] This utility model forms a main frame through a support beam 1 and two side plates 2, and further strengthens the structure by connecting beam 3 and front baffle 4, thus forming a stable three-dimensional structure. The lidar support 5 is set on the outside of the side plates 2 to ensure a panoramic view. Millimeter-wave radar support 6 and warning light bracket 7 are respectively set at both ends of the top of the support beam 1, realizing the reasonable layout and integrated installation of multiple devices at a high position, effectively improving the detection range and the stability of the overall structure under harsh working conditions.

[0033] In some embodiments, such as Figure 2 As shown, the outer periphery of the side plate 2 is provided with a reinforcing flange 23 that extends laterally inward, and the reinforcing flange 23 is in contact with the inner surface of the receiving groove 101.

[0034] For example, the reinforced flange 23 and the receiving groove 101 are detachably connected by a plurality of bolt and nut assemblies, which improves the convenience of transportation and assembly, and facilitates the maintenance or replacement of components, thereby improving the maintainability and service life of the product.

[0035] The above design increases the contact area between the side plate 2 and the support beam 1, greatly enhancing the structural rigidity and deformation resistance of the side plate 2 itself, and improving the connection strength between the side plate 2 and the support beam 1, effectively improving the overall stability and durability of the device.

[0036] Based on the above embodiments, such as Figure 2As shown, the two sides of the front baffle 4 along its length are attached and fixed to the inner sides of the two reinforcing flanges 23.

[0037] For example, the two sides of the front baffle 4 along its length are detachably connected to the reinforcing flange 23 by a plurality of bolt and nut assemblies, which enables modular installation and disassembly of the front baffle 4, facilitating maintenance or replacement, and ensuring structural integrity and torsional stiffness.

[0038] Through the above design, the front baffle 4 is effectively integrated into the main frame, which not only enhances its own rigidity, but also tightens and stabilizes the two side plates 2, thereby improving the overall integrity and torsional stiffness of the front structure of the entire device and optimizing the load distribution.

[0039] Based on the above embodiments, such as Figure 2 As shown, it includes: Two pads 8 are respectively placed on the outer bottom surface of the two reinforcing flanges 23, which can effectively disperse the fastening pressure and prevent stress concentration, thereby avoiding local deformation of the reinforcing flanges 23 and protecting the vehicle mounting surface. They are made of elastic materials (such as rubber and polyurethane) and play a role in vibration reduction and sound insulation. The bottom plate 9 has two reinforcing flanges 23 on its inner bottom surfaces on both sides along its length, which enhances the structural stability of the entire frame at the bottom, improves the frame's resistance to deformation, and can effectively block foreign objects such as gravel falling on the top of the cab, preventing these foreign objects from directly impacting and damaging the cab roof.

[0040] For example, the two sides of the base plate 9 along its length are detachably connected to the reinforcing flange 23 by multiple bolt and nut assemblies, which realizes the modular installation and disassembly of the base plate 9, facilitates maintenance or replacement, and ensures the integrity of the structure and torsional stiffness.

[0041] Through the above design, the pad strip 8 plays a role in dispersing stress, adapting to the installation plane and reducing vibration, while the base plate 9 enhances the overall structural rigidity and provides physical protection against the impact of gravel on the top of the cab.

[0042] In this embodiment, as Figure 1 and Figure 2 As shown, the base plate 9 has a first folded edge 901 on both sides in the width direction, and the front baffle 4 has a second folded edge 401 on both sides in the width direction.

[0043] The above design enhances the structural rigidity of the base plate 9 and the front baffle 4, effectively preventing them from bending and deforming under stress, and improving the structural stability and durability of the entire device.

[0044] In this embodiment, as Figure 2As shown, it also includes: a wire harness fixing assembly 10, used to provide a safe, orderly, and reliable fixing path for the cables of all sensors and devices, specifically including: Multiple first U-shaped poles 1001 are laterally spaced on the rear side of the support beam 1 to gather and fix the cables leading out from the top equipment of the device (such as millimeter-wave radar and warning lights at both ends), forming a line along the direction of the support beam 1, so that the cables are neatly gathered at the fourth U-shaped pole 1004. Multiple second U-shaped rods 1002 are laterally spaced on the rear side of the connecting beam 3 to fix cables that need to cross the middle of the device laterally, such as the cable of the lidar, and to neatly gather the cables to the fourth U-shaped rod 1004. Multiple third U-shaped rods 1003 are laterally spaced on the rear side of the lidar support 5 to fix the lidar cable and make the cable neatly converge at the second U-shaped rod 1002. Multiple fourth U-shaped rods 1004, vertically spaced on the rear side of a reinforced flange 23, serve as the downward channel for the entire wiring harness. All cables that converge from above and the middle are ultimately vertically bundled here and neatly guided to the vehicle body below for connection to the control system.

[0045] The above design provides dedicated fixing points for all sensor cables in partitioned and oriented configurations, achieving neat bundling and reliable anchoring of the cable harnesses. This effectively prevents cable loosening and wear caused by vehicle vibration, improves wiring standardization and system maintenance convenience, and ensures long-term stable operation of the entire sensing system under harsh conditions.

[0046] In some embodiments, such as Figure 2 As shown, the side panel 2 has multiple hollow openings 201, and the front baffle 4 has multiple ventilation holes 402. Through the above design, while ensuring structural strength, the overall weight of the device is reduced, the amount of materials used is reduced, and the ventilation hole 402 also forms a through airflow channel, thereby reducing wind resistance.

[0047] In some embodiments, such as Figure 1 As shown, the lidar support 5 includes: a support body 51, a diagonal brace tube 52, and multiple pressure plates 53, the specific configuration of which is as follows: The main body 51 of the bracket is L-shaped and includes a connecting plate 511 and a mounting plate 512 that are perpendicular to each other. The connecting plate 511 is attached to the side plate 2 over a large area to ensure that the load can be effectively transferred. The mounting plate 512 is the mounting reference surface of the lidar. It is flat and stable and is used to directly mount the lidar. Furthermore, the layout perpendicular to the connecting plate 511 allows the lidar to extend to the side of the vehicle body and obtain an unobstructed detection field of view. The diagonal bracing tube 52 is located between the connecting plate 511 and the mounting plate 512, forming a triangular support structure, which enhances the rigidity and stability of the bracket body 51, prevents the mounting plate 512 from shaking or sagging, and ensures the detection accuracy of the lidar. Multiple pressure plates 53 are vertically spaced on the outside of the connecting plate 511. Their large contact area can improve the clamping firmness and resistance to shearing forces. The connecting plate 511 is attached to the side plate 2, and the pressure plate 53, the connecting plate 511 and the side plate 2 are locked and fixed by multiple sets of bolt assemblies. This increases the contact and friction area, effectively suppresses micro-movement and slippage at the connection, ensures the reliability of long-term connection, and realizes modular installation and disassembly, which is convenient for maintenance or replacement.

[0048] Through the above design, the fit and installation of the side plate 2 and the load-bearing of the lidar are achieved, and the vibration resistance and rigidity of the structure are ensured. In addition, the connecting plate 511 and the side plate 2 are firmly clamped by multiple vertically spaced pressure plates 53 and bolt assemblies, forming a reliable locking mechanism and improving the structural stability.

[0049] Based on the above embodiments, such as Figure 1 As shown, the connecting plate 511 has a third folded edge 51101 on both sides in the width direction, and the mounting plate 512 has a fourth folded edge 51201 on both sides in the width direction. The fourth folded edge 51201 is attached to the outside of the third folded edge 51101.

[0050] The above design creates a nested reinforced structure, which not only greatly enhances the bending resistance of the connecting plate 511 and the mounting plate 512, but also greatly enhances the structural strength and load-bearing capacity at the corner through the bonding and fixing of the inner and outer folded edges.

[0051] Based on the above embodiments, such as Figure 1 As shown, the pressure plate 53 has fifth folded edges 5301 on both the upper and lower sides. The above design enhances the structural rigidity of the pressure plate 53, making it less prone to bending and deformation under the preload of the locking bolts. This ensures that the pressure plate 53 can apply a continuous, uniform, and stable clamping force, effectively improving its anti-loosening capability and connection reliability.

[0052] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] 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 the 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 or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A fixing device for an upper-level sensing system, characterized in that, include: The supporting beam has a U-shaped cross-section with the opening facing downwards to form a receiving groove; Two side plates are respectively disposed opposite to each other at both ends of the support beam. Each side plate is L-shaped and includes a vertical section and a horizontal section, and the upper part of the vertical section is fixedly embedded in the receiving groove. The connecting beam is installed at both ends on the inner middle of the two side plates respectively; The front baffle is vertically installed between the two vertical sections and located on the side of the vertical section away from the horizontal section, and is parallel to the length direction of the support beam; A lidar support is installed on the outside of one of the aforementioned L-shaped side plates; Two millimeter-wave radar supports are respectively installed at both ends of the top surface of the support beam; Two warning light brackets are respectively installed at both ends of the top surface of the support beam and located between the two millimeter-wave radar supports.

2. The upper-layer sensing system fixing device according to claim 1, characterized in that, The outer periphery of the side plate is provided with a reinforcing flange that extends laterally inward, and the reinforcing flange is in contact with the inner surface of the receiving groove.

3. The upper-layer sensing system fixing device according to claim 2, characterized in that, The two sides of the front baffle along its length are attached and fixed to the inner sides of the two reinforcing flanges.

4. The upper-layer sensing system fixing device according to claim 2, characterized in that, include: Two pads are respectively placed on the outer bottom surface of the two reinforcing flanges; The base plate has two sides along its length located on the inner bottom surfaces of the two reinforcing flanges.

5. The upper-layer sensing system fixing device according to claim 4, characterized in that, The base plate has a first folded edge on both sides in the width direction, and the front baffle has a second folded edge on both sides in the width direction.

6. The upper-layer sensing system fixing device according to claim 2, characterized in that, include: The wire harness fixing assembly includes: Multiple first U-shaped rods are laterally spaced on the rear side of the support beam; Multiple second U-shaped rods are laterally spaced on the rear side of the connecting beam; Multiple third U-shaped rods are laterally spaced on the rear side of the lidar support; Multiple fourth U-shaped rods are vertically spaced on the rear side of one of the reinforcing flanges.

7. The upper-layer sensing system fixing device according to claim 1, characterized in that, The side panel has multiple cutouts, and the front baffle has multiple ventilation holes.

8. The upper-layer sensing system fixing device according to claim 1, characterized in that, The lidar support includes: The main body of the bracket is L-shaped and includes mutually perpendicular connecting plates and mounting plates; A diagonal bracing tube is provided between the connecting plate and the mounting plate; Multiple pressure plates are arranged vertically at intervals on the outside of the connecting plate; The connecting plate is attached to the side plate, and the pressure plate, the connecting plate and the side plate are locked and fixed by multiple sets of bolt assemblies.

9. The upper-layer sensing system fixing device according to claim 8, characterized in that, The connecting plate has a third folded edge on both sides in the width direction, and the mounting plate has a fourth folded edge on both sides in the width direction, with the fourth folded edge fitting against the outside of the third folded edge.

10. The upper-layer sensing system fixing device according to claim 8, characterized in that, The pressure plate has a fifth fold on both the top and bottom sides.

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