A kind of anti-bending reinforced full-metal shell structure

Abstract

The application discloses a kind of anti-bending reinforced full-metal shell structure, belongs to portable storage device structure design technical field, it includes metal shell assembly, stress transmission framework, self-locking buckle mechanism, reinforcing component and reinforcing structure;When the U disk is subjected to external force, the internal framework structure will convert partial concentrated stress into overall uniform stress, avoid welding point overload failure, specifically for lateral force to pass through shell to branch transmission rod, main support beam occurs elastic bending deformation after stress absorption energy, the ability of structure solder pad is greatly improved, after thousand times plug test, there is no loosening, the overall structure bending bearing force is greatly improved, wedge-shaped slider moves along V-shaped elastic sheet inclined surface, displacement reaches 0.5mm when triggering self-locking effect, make wedge-shaped slider and metal shell assembly contact, pressure and external force are proportional to increase, enhance the bearing capacity of metal shell assembly, self-locking mechanism response time is shortened to 0.02 seconds under impact load.

Description

Technical Field

[0001] This application relates to the field of portable storage device structural design technology, and in particular to a bending-resistant reinforced all-metal shell structure. Background Technology

[0002] Currently, USB flash drives are widely used as portable storage devices for data transmission, but their structural reliability issues have long existed. With the increasing demand for data exchange, the number of plug-in / plug-out cycles per day in enterprise-level applications can reach more than 100. Traditional plastic shells are prone to deformation and cracking, while metal shells, although they can improve strength, cannot solve the problem of stress concentration at the interface.

[0003] Mainstream USB flash drives use a design where the USB connector is directly soldered to the PCB board. The solder joint becomes a weak point in mechanical strength. The first-generation improvement solution protected the solder joint by adding an epoxy resin potting layer, but this resulted in a 30% decrease in heat dissipation performance. The second-generation solution used a spring-loaded contact design to replace soldering, which alleviated the solder joint fatigue problem, but increased the contact resistance by 15% and doubled the cost. The latest solution sets a metal reinforcing frame on the edge of the PCB board and fixes the shell through a dispensing process. Tests show that this solution can improve the bending resistance by 40%, but it still cannot completely eliminate the problem of microcrack propagation under repeated torsional loads.

[0004] Therefore, the existing technology has three main defects: first, the stress concentration at the weld point cannot be solved by the shell alone; second, the assembly tolerance between the reinforcement structure and the shell leads to secondary stress; and third, the traditional snap-fit ​​mechanism will produce irreversible deformation when the external force exceeds the threshold.

[0005] Therefore, this application proposes a bending-resistant reinforced all-metal shell structure. Utility Model Content

[0006] This application proposes a bending-resistant reinforced all-metal shell structure to solve the problems mentioned in the background art. By setting a stress transmission skeleton and a self-locking mechanism, when the USB flash drive is subjected to external force, the internal skeleton structure transforms the local concentrated stress into a uniform overall force, avoiding solder joint overload failure. Specifically, the lateral force is transmitted to the branch transmission rod through the shell, and the main support beam undergoes elastic bending deformation to absorb energy after being subjected to force. The structural solder pads' resistance to detachment is greatly improved. After thousands of insertion and removal tests, there is no loosening. The overall structural bending resistance is greatly improved, which is significantly better than the traditional solution. The wedge slider moves along the inclined surface of the V-shaped elastic plate. When the displacement reaches 0.5mm, the self-locking effect is triggered, causing the wedge slider to contact the metal shell assembly. The pressure increases proportionally with the external force, enhancing the bearing capacity of the metal shell assembly. The response time of the self-locking mechanism under impact load is shortened to 0.02 seconds, which solves the problem that the USB connector solder joints are prone to breakage and failure under bending load, the stress transmission between the shell and the internal skeleton is discontinuous, and the traditional structure cannot achieve adaptive locking with increasing external force.

[0007] To achieve the above objectives, this application adopts the following technical solution: A bending-resistant reinforced all-metal shell structure includes a metal shell assembly, a stress-transmitting skeleton, a self-locking buckle mechanism, a reinforcing assembly, and a reinforcing structure. The stress-transmitting skeleton and the self-locking buckle mechanism are disposed inside the metal shell assembly, and the self-locking buckle mechanism is connected to the stress-transmitting skeleton. The reinforcing assembly and the reinforcing structure are disposed outside the metal shell assembly.

[0008] In a preferred embodiment, the metal housing assembly includes a cover plate a, a cover plate b, and side wall reinforcing ribs. The cover plate a and the cover plate b are laser welded to form a sealed cavity, and a set of side wall reinforcing ribs are respectively provided on the inner walls of both sides of the sealed cavity. Laser welding is used between cover plate a and cover plate b. Laser welding has the advantages of fast abutment speed, no foreign body reaction during the healing process, and preservation of the mechanical properties of the welded part, thereby improving the practicality of the device.

[0009] In a preferred embodiment, each group of sidewall reinforcing ribs consists of several ribs arranged longitudinally; By setting side wall reinforcing ribs, strip-shaped reinforcing members designed to ensure local stability of the components and transmit concentrated forces, the stability and torsional performance of the beam can be improved, thereby enhancing the practicality of the device.

[0010] In a preferred embodiment, the stress transmission frame includes a main support beam and branch transmission rods. The two ends of the main support beam are injection molded to fit the USB connector and are connected to the outer shell. The branch transmission rods are radially distributed and have a 0.2mm gap reserved with the inner wall of the outer shell, and are connected to the main support beam. By setting up a stress transmission frame, lateral forces are transmitted to the branch transmission rods through the outer shell. After being subjected to force, the main support beam undergoes elastic bending deformation to absorb energy, thereby improving the practicality of the device.

[0011] In a preferred embodiment, the self-locking buckle mechanism includes two V-shaped elastic plates and a wedge-shaped slider. The roots of the two V-shaped elastic plates are fixedly connected to the branch transmission rod, and the free ends are engaged with the outer casing groove at a 30° angle. Both wedge-shaped sliders are slidably connected to the angled surface of the V-shaped elastic plates. When the wedge-shaped slider moves along the inclined surface of the V-shaped elastic plate, the self-locking effect is triggered when the displacement reaches 0.5mm, causing the wedge-shaped slider to contact the metal housing assembly. The pressure increases proportionally with the external force, enhancing the bearing capacity of the metal housing assembly and thus improving the practicality of the device.

[0012] In a preferred embodiment, the reinforcing component includes two crosses and diagonal braces. The two crosses are fixedly connected to the outside of cover plate a and cover plate b, respectively, and multiple diagonal braces are fixedly connected to the outside of cover plate a and cover plate b. By incorporating reinforcing components, the probability of deformation can be reduced when the outer shell is subjected to force, providing some support to the shell, preventing deformation, and thus improving the practicality of the device.

[0013] In one preferred embodiment, every four of the diagonal bars are connected to the cross to form a star-shaped, radial pattern; The cross and diagonal bars form a star shape, radiating outwards. This effectively disperses the force when the outer shell is subjected to stress, thereby enhancing the device's practicality.

[0014] In a preferred embodiment, the reinforcing structure includes colloid and particles, and the outer surfaces of cover plate a and cover plate b are respectively provided with colloid and particles, and the particles are covered on the outer surfaces of cover plate a and cover plate b by colloid. By strengthening the structure, the thickness of the outer shell can be increased, thereby enhancing the load-bearing capacity of the outer shell and improving the practicality of the device.

[0015] The beneficial effects of this application are: 1. This type of bending-resistant reinforced all-metal shell structure, by setting up a stress transmission skeleton, transmits lateral force to the branch transmission rod through the shell. After the main support beam is subjected to force, it undergoes elastic bending deformation to absorb energy. The structural pads have a significantly improved resistance to detachment. After thousands of insertion and removal tests, there is no loosening. The overall bending resistance of the structure is greatly improved, which is more effective than the traditional solution and greatly improves the practicality of the device. 2. This bend-resistant reinforced all-metal shell structure incorporates a self-locking mechanism. A wedge-shaped slider moves along the inclined surface of a V-shaped elastic plate, triggering a self-locking effect when the displacement reaches 0.5mm. This causes the wedge-shaped slider to contact the metal shell assembly, with pressure increasing proportionally to the external force, thus enhancing the metal shell assembly's load-bearing capacity. The self-locking mechanism's response time under impact load is reduced to 0.02 seconds, addressing the issues of USB connector solder joints easily breaking under bending loads, discontinuous stress transmission between the shell and internal frame, and the inability of traditional structures to achieve adaptive locking with increasing external force. This significantly improves the device's practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the device in this application; Figure 2 This is a front view of the internal structure of the device described in this application; Figure 3 This is a schematic diagram of the internal side of the device in this application; Figure 4 For this application Figure 3 Enlarged view of point A in the middle.

[0017] Labels in the diagram: 1. Metal shell assembly; 11. Cover plate a; 12. Cover plate b; 13. Side wall reinforcing rib; 2. Stress transmission frame; 21. Main support beam; 22. Branch transmission rod; 3. Self-locking buckle mechanism; 31. V-shaped elastic sheet; 32. Wedge slider; 4. Reinforcing assembly; 41. Cross; 42. Diagonal bar; 5. Reinforcing structure; 51. Colloid; 52. Particle. Detailed Implementation

[0018] The technical solutions in 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, and not all embodiments.

[0019] Reference Figure 1-4 A bending-resistant reinforced all-metal shell structure includes a metal shell assembly 1, a stress transmission frame 2, a self-locking buckle mechanism 3, a reinforcing component 4, and a reinforcing structure 5. The stress transmission frame 2 and the self-locking buckle mechanism 3 are provided inside the metal shell assembly 1 and are connected to the stress transmission frame 2. The reinforcing component 4 and the reinforcing structure 5 are provided on the outside of the metal shell assembly 1.

[0020] Reference Figure 1-3 The metal housing assembly 1 includes a cover plate a11, a cover plate b12, and side wall reinforcing ribs 13. The cover plate a11 and the cover plate b12 are laser welded to form a sealed cavity. A set of side wall reinforcing ribs 13 are respectively provided on the inner walls of both sides of the sealed cavity. The cover plate a11 and the cover plate b12 are laser welded together. Laser welding has the advantages of fast abutment speed, no foreign body reaction during the healing process, and preservation of the mechanical properties of the welded part, thereby improving the practicality of the device.

[0021] Reference Figure 2 Each set of sidewall reinforcing ribs 13 consists of several ribs arranged longitudinally. By setting the sidewall reinforcing ribs 13, the strip-shaped reinforcing members set to ensure the local stability of the component and transmit concentrated forces can improve the stability and torsional performance of the beam, thereby enhancing the practicality of the device.

[0022] Reference Figure 2 The stress transmission frame 2 includes a main support beam 21 and branch transmission rods 22. The two ends of the main support beam 21 are injection molded to form a USB connector and connected to the outer shell. The branch transmission rods 22 are radially distributed and have a 0.2mm gap reserved with the inner wall of the outer shell, and are connected to the main support beam 21. By setting the stress transmission frame 2, the lateral force is transmitted to the branch transmission rods 22 through the outer shell. After the main support beam 21 is subjected to force, it undergoes elastic bending deformation to absorb energy, thereby improving the practicality of the device.

[0023] Reference Figure 3-4 The self-locking buckle mechanism 3 includes two V-shaped elastic plates 31 and a wedge-shaped slider 32. The roots of the two V-shaped elastic plates 31 are fixedly connected to the branch transmission rod 22, and the free ends form a 30° inclined surface with the outer shell groove. The two wedge-shaped sliders 32 are slidably connected to the inclined surface of the V-shaped elastic plates 31. When the wedge-shaped slider 32 moves along the inclined surface of the V-shaped elastic plates 31, the self-locking effect is triggered when the displacement reaches 0.5mm, so that the wedge-shaped slider 32 contacts the metal outer shell assembly 1. The pressure increases proportionally with the external force, which enhances the bearing capacity of the metal outer shell assembly 1, thereby improving the practicality of the device.

[0024] Reference Figure 1 The reinforcing component 4 includes two crosses 41 and diagonal bars 42. The two crosses 41 are fixedly connected to the outside of cover plate a11 and cover plate b12 respectively. Multiple diagonal bars 42 are fixedly connected to the outside of cover plate a11 and cover plate b12. By setting the reinforcing component 4, the probability of deformation can be reduced when the shell is under force, and it can play a certain supporting role for the shell, prevent deformation, and thus improve the practicality of the device.

[0025] Reference Figure 1 Every four diagonal bars 42 are connected to the cross 41 to form a star-shaped radial pattern. The star-shaped radial pattern formed by the cross 41 and diagonal bars 42 can effectively disperse the force when the outer shell is subjected to force, thereby improving the practicality of the device.

[0026] Reference Figure 1 The reinforcing structure 5 includes a colloid 51 and particles 52. The outer surfaces of the cover plate a11 and the cover plate b12 are respectively provided with colloid 51 and particles 52. The particles 52 are covered on the outer surfaces of the cover plate a11 and the cover plate b12 by the colloid 51. The thickness of the outer shell can be increased by the reinforcing structure 5. By increasing the thickness, the load-bearing capacity of the outer shell can be strengthened, thereby improving the practicality of the device.

[0027] Working principle: When the USB flash drive is subjected to external force, the internal skeleton structure transforms the localized concentrated stress into a uniform overall force, preventing solder joint overload failure. Specifically, the lateral force is transmitted to the branch transmission rod 22 through the outer shell. After being subjected to force, the main support beam 21 undergoes elastic bending deformation to absorb energy. At the same time, the wedge slider 32 moves along the inclined surface of the V-shaped elastic plate 31. When the displacement reaches 0.5mm, the self-locking effect is triggered, causing the wedge slider 32 to contact the metal outer shell assembly 1. The pressure increases proportionally with the external force, enhancing the bearing capacity of the metal outer shell assembly 1. The solder pads of this shell structure have a significantly improved resistance to detachment. After thousands of insertion and removal tests, there is no loosening. The bending bearing capacity of the overall structure is greatly improved, which is significantly better than the traditional solution. The response time of the self-locking mechanism under impact load is shortened to 0.02 seconds, which solves the problem that the USB connector solder joints are prone to breakage and failure under bending load, the stress transmission between the outer shell and the internal skeleton is discontinuous, and the traditional structure cannot achieve adaptive locking with increasing external force.

[0028] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and the inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A bending-resistant reinforced all-metal shell structure, comprising a metal shell assembly (1), a stress-transmitting skeleton (2), a self-locking buckle mechanism (3), a reinforcing assembly (4), and a reinforcing structure (5), characterized in that, The metal shell assembly (1) is provided with a stress transmission frame (2) and a self-locking buckle mechanism (3) inside. The self-locking buckle mechanism (3) is connected to the stress transmission frame (2). The metal shell assembly (1) is provided with a reinforcing component (4) and a reinforcing structure (5) on the outside.

2. The bending-resistant reinforced all-metal shell structure according to claim 1, characterized in that, The metal housing assembly (1) includes a cover plate a (11), a cover plate b (12) and side wall reinforcing ribs (13). The cover plate a (11) and the cover plate b (12) are laser welded to form a sealed cavity. A set of side wall reinforcing ribs (13) are respectively provided on the inner walls of the two sides of the sealed cavity.

3. The bending-resistant reinforced all-metal shell structure according to claim 2, characterized in that, Each set of sidewall reinforcing ribs (13) consists of several ribs arranged longitudinally.

4. The bending-resistant reinforced all-metal shell structure according to claim 1, characterized in that, The stress transmission frame (2) includes a main support beam (21) and branch transmission rods (22). The two ends of the main support beam (21) are injection molded with USB connectors and connected to the outer shell. The branch transmission rods (22) are radially distributed and have a 0.2mm gap reserved with the inner wall of the outer shell, and are connected to the main support beam (21).

5. The bending-resistant reinforced all-metal shell structure according to claim 1, characterized in that, The self-locking buckle mechanism (3) includes two V-shaped elastic plates (31) and a wedge-shaped slider (32). The roots of the two V-shaped elastic plates (31) are fixedly connected to the branch transmission rod (22), and the free ends are engaged with the outer casing groove at a 30° angle. The two wedge-shaped sliders (32) are slidably connected to the angle of the V-shaped elastic plates (31).

6. The bending-resistant reinforced all-metal shell structure according to claim 1, characterized in that, The reinforcing component (4) includes two crosses (41) and diagonal bars (42). The two crosses (41) are fixedly connected to the outside of cover plate a (11) and cover plate b (12), respectively. Multiple diagonal bars (42) are fixedly connected to the outside of cover plate a (11) and cover plate b (12).

7. The bending-resistant reinforced all-metal shell structure according to claim 6, characterized in that, Every four of the diagonal bars (42) are connected to the cross (41) to form a star-shaped pattern that radiates outwards.

8. The bending-resistant reinforced all-metal shell structure according to claim 2, characterized in that, The reinforcing structure (5) includes a colloid (51) and particles (52). The outer surfaces of the cover plate a (11) and the cover plate b (12) are respectively provided with a colloid (51) and particles (52). The particles (52) are covered on the outer surfaces of the cover plate a (11) and the cover plate b (12) by the colloid (51).

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