A double-gear-shaft type screen shaft and double screen display

Abstract

The utility model belongs to display technical field, specifically discloses a kind of double gear shaft formula screen shaft and double screen display, double gear shaft formula screen shaft includes shell and two interval settings gear shaft, the axle end of each gear shaft reaches to shell inside and is rotatably connected with shell, the other axle end of each gear shaft reaches to shell outside and forms connecting end, wheel seat is commonly set on two gear shafts, wheel seat is located in shell, cylindrical gear is rotatably installed in wheel seat, cylindrical gear is located between two gear shafts and is engaged with the gear section of two gear shafts.The screen shaft of the utility model is not only compact, stable, high-precision, so that screen shaft can realize accurate angle adjustment, and have enough carrying capacity.The double screen display includes support plate and two screens, support plate is located between two screens, the both ends of support plate are rotatably connected with two screens by double gear shaft formula screen shaft, realize flexible, stable, accurate relative motion between screen.

Description

Technical Field

[0001] This utility model belongs to the field of display technology, and in particular relates to a dual-gear shaft screen hinge and a dual-screen display. Background Technology

[0002] In display devices, foldable electronic devices, and mechanical devices requiring precise angle adjustments, the screen hinge serves as a key component for connection and support, and its performance directly affects the stability, flexibility, and durability of the device.

[0003] Existing screen hinge designs, such as single-axis rotation mechanisms or simple linkage structures, often exhibit problems such as insufficient adjustment precision, poor stability, and insufficient load-bearing capacity when dealing with complex and ever-changing adjustment requirements. These problems are particularly prominent in applications requiring precise angle adjustment, synchronous movement, or the ability to withstand large loads.

[0004] Meanwhile, with the development of information technology, dual-screen monitors have become increasingly popular due to their ability to improve work efficiency and optimize multitasking capabilities. However, most existing dual-screen monitors use fixed installations or simple linkage mechanisms for connection. These designs often reveal problems such as inconvenient adjustment, insufficient stability, and poor flexibility when dealing with complex and ever-changing usage scenarios. In particular, when frequent adjustments to screen angles or synchronized movement between screens are required, existing designs struggle to meet the demands, severely impacting the user experience and the overall performance of the monitor.

[0005] Therefore, the inventors dedicated themselves to designing a hinge and a dual-screen display to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a dual-gear shaft screen shaft that is not only compact in structure, has high adjustment precision and good stability, but also has sufficient load-bearing capacity.

[0007] Another objective of this invention is to provide a dual-screen display that enables flexible, stable, and precise relative movement between the screens.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A dual-gear shaft screen shaft includes a housing and two spaced-apart gear shafts. One end of each gear shaft extends into the housing and is rotatably connected to the housing. The other end of each gear shaft extends out of the housing to form a connecting end. A wheel seat is commonly fitted on both gear shafts. The wheel seat is located inside the housing. A cylindrical gear is rotatably mounted inside the wheel seat. The cylindrical gear is located between the two gear shafts and meshes with the gear segments of the two gear shafts.

[0009] As an improvement of the dual-gear shaft screen shaft of this utility model, a self-locking piece is positioned and connected inside the outer shell. The self-locking piece is sleeved on the two gear shafts with a gap. A self-locking wheel is elastically connected and axially slidably sleeved on each gear shaft. The two self-locking wheels are self-locked with the self-locking piece in a concave-convex limiting position.

[0010] As an improvement of the dual-gear shaft screen shaft of this utility model, the self-locking wheel has a protrusion on its self-locking end face, and the self-locking plate has a groove on its self-locking end face for cooperating with the protrusion.

[0011] As an improvement of the dual-gear shaft screen shaft of this utility model, the self-locking wheel is elastically connected to the corresponding gear shaft through multiple spring pieces, and all the spring pieces are stacked and axially slidably sleeved on the corresponding gear shaft.

[0012] As an improvement of the dual-gear shaft screen shaft of this utility model, the self-locking plate is located outside the wheel seat and sandwiched between the self-locking plate and the wheel seat, and the same pair of friction plates are axially slidably sleeved on the two gear shafts respectively.

[0013] As an improvement of the dual-gear shaft screen shaft of this utility model, a connecting piece is provided between two adjacent pairs of friction plates, and the connecting piece is sleeved on the two gear shafts with a gap.

[0014] As an improvement of the dual-gear shaft screen shaft of this utility model, the housing is divided into a wiring cavity and a rotating cavity by a partition. The wheel seat is located in the rotating cavity, and the rotating ends of the two gear shafts are located in the rotating cavity and are rotatably connected to the partition. The partition is positioned and connected to the self-locking piece by a connecting column.

[0015] As an improvement of the dual-gear shaft screen shaft of this utility model, the wheel seat includes a seat body and a connecting strip. The seat body is U-shaped and the connecting parts at both ends are sleeved on the two gear shafts. The connecting strip covers the opening of the seat body and is snapped into the seat body. The snapping grooves at both ends of the connecting strip are snapped into the two gear shafts one by one.

[0016] As an improvement of the dual-gear shaft screen shaft of this utility model, the wiring end cover of the outer shell is provided with a wire-passing plug, the wire-passing plug is provided with two wire-passing holes, the two wire-passing holes are connected to the wiring cavity inside the outer shell, and the connecting ends of the two gear shafts are respectively fixedly connected with fixing plates, the two fixing plates are located outside the outer shell.

[0017] To achieve the aforementioned other objective, the technical solution adopted by this utility model is as follows: A dual-screen display includes a support plate and two screens. The support plate is located between the two screens, and both ends of the support plate are rotatably connected to the two screens via the aforementioned double-gear shaft screen hinge.

[0018] Compared with existing technologies, the dual-gear shaft screen shaft of this utility model, by setting a wheel seat inside the outer shell, utilizes the meshing of the cylindrical gear inside the wheel seat with the gear segments of the two gear shafts outside the wheel seat to form a highly efficient and stable transmission mechanism. This not only achieves a compact and efficient structure, reducing unnecessary space and material waste, and ensuring high precision in the transmission process, enabling the screen shaft to achieve precise angle adjustment, but also has sufficient load-bearing capacity, maintaining stable operation even when facing large loads and torques, effectively preventing accidental movement of the screen when not subjected to external forces.

[0019] Compared with the prior art, the dual-screen display of this utility model uses a double gear shaft screen axis with compact structure, high adjustment precision, good stability and sufficient load-bearing capacity to connect the support plate to the two screens, realizing flexible, stable and precise relative movement between the screens. Attached Figure Description

[0020] Figure 1 This is a three-dimensional enlarged view of the double gear shaft screen hinge of this utility model; Figure 2 This is another three-dimensional enlarged view of the double gear shaft screen shaft of this utility model; Figure 3 This is a three-dimensional exploded view of the double gear shaft screen shaft of this utility model; Figure 4 This is a three-dimensional exploded and enlarged view of the self-locking plate and the two self-locking wheels in this utility model; Figure 5 This is another exploded and enlarged perspective view of the self-locking plate and two self-locking wheels of this utility model; Figure 6 This is a three-dimensional enlarged view of the wheel seat, two gear shafts, multiple connecting pieces, self-locking pieces, two self-locking wheels and multiple spring pieces in this utility model; Figure 7 This is a partially exploded enlarged view of the wheel seat and two gear shafts of this utility model; Figure 8 This is an enlarged cross-sectional view of the double gear shaft screen shaft of this utility model; Figure 9 This is another enlarged cross-sectional view of the double gear shaft screen shaft of this utility model; Figure 10 yes Figure 9 Enlarged view of point A in the middle; Figure 11 This is a simplified structural diagram of the dual-screen display of this utility model.

[0021] Illustration: 1. Outer shell; 11. Cable guide plug; 111. Cable guide hole; 12. Partition plate; 121. Cable routing cavity; 122. Rotating cavity; 2. Gear shaft; 21. Fixing plate; 22. Flat surface; 3. Wheel seat; 31. Seat body; 311. Connecting part; 312. Locking platform; 32. Connecting strip; 321. Locking groove; 33. Cylindrical gear; 4. Connecting piece; 41. Friction piece; 5. Self-locking piece; 51. Connecting column; 52. Locking groove; 6. Self-locking wheel; 61. Protrusion; 7. Spring piece; 71. Nut; 8. Double gear shaft screen shaft; 9. Main screen; 91. Sub-screen; 92. Support plate. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below with reference to the accompanying drawings. The drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of this utility model.

[0023] Reference Figures 1 to 10 A double-gear shaft screen shaft 8 includes a housing 1, a wheel seat 3, and two gear shafts 2. The two gear shafts 2 are spaced apart. One end of each gear shaft 2 extends into the housing 1 and is rotatably connected to the housing 1. The other end of each gear shaft 2 extends out of the housing 1 to form a connecting end. The wheel seat 3 is sleeved on the two gear shafts 2 and is located inside the housing 1. A cylindrical gear 33 is rotatably installed in the wheel seat 3 and is located between the two gear shafts 2 and meshes with the gear segments of the two gear shafts 2.

[0024] Reference Figure 1 , Figure 2 and Figure 8 The outer shell 1 is rectangular in shape, with open ends on both sides. A wire pass plug 11 is provided on the left end of the outer shell 1. The interior of the outer shell 1 is divided by a partition 12 to form a wiring cavity 121 and a rotating cavity 122. The wiring cavity 121 is located on the left side of the partition 12, and the rotating cavity 122 is located on the right side of the partition 12. The partition 12 and the outer shell 1 are integrally formed from the same material. A connecting post 51 is fixed on the partition 12 by screws. A wire pass plug 11 is provided on the wiring end face of the outer shell 1 (i.e., the left end face of the outer shell 1). The wire pass plug 11 has two wire pass holes 111, which are connected to the wiring cavity 121 inside the outer shell 1. The two wire pass holes 111 are coaxially arranged with the two gear shafts 2 one-to-one.

[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8The two gear shafts 2 have basically the same structure. The gear shaft 2 is composed of a shaft body and gears (such as spur gears and helical gears). In this embodiment, the gear segment in the middle of the gear shaft 2 is a helical gear. The two shaft ends of the gear shaft 2 are its rotating end and connecting end, respectively. The two gear shafts 2 are set close to the inner wall of the outer shell 1. The rotating end (i.e., the left end) of each gear shaft 2 extends into the rotating cavity 122 and is rotatably connected to the through hole on the partition plate 12. Two planes 22 are provided on the outer wall of the left end of each gear shaft 2 along its axial direction for limiting the rotation of the corresponding components on the gear shaft 2. A fixing plate 21 is fixedly connected to the connecting end (i.e., the right end) of the two gear shafts 2 respectively. The gear segment of the gear shaft 2 is located between the two planes 22 and the corresponding fixing plate 21. Both fixing plates 21 are located outside the outer shell 1.

[0026] Reference Figure 6 , Figure 7 and Figure 8 The wheel seat 3 is located inside the rotating cavity 122. The wheel seat 3 includes a body 31 and a connecting strip 32. The body 31 is U-shaped and its opening faces to the right. The upper and lower ends of the body 31 extend outward to form two annular connecting parts 311. The two connecting parts 311 are respectively sleeved on the two gear shafts 2. A T-shaped locking platform 312 is provided at the opening of the body 31. The connecting strip 32 covers the opening of the body 31 and is engaged with the body 31. Specifically, the top of the connecting strip 32 is provided with a locking groove and two locking slots 321. The locking groove is located between the two locking slots 321. The two locking slots 321 are respectively located at both ends of the connecting strip 32. The locking platform 312 is engaged with the locking groove. The right ends of the two gear shafts 2 are respectively engaged with the two locking slots 321 one by one. The gear segment of each gear shaft 2 is located between the corresponding connecting part 311 and the connecting strip 32.

[0027] Reference Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 8 , Figure 9 and Figure 10A self-locking piece 5 is positioned and connected within the rotating cavity 122 of the outer casing 1 via a connecting post 51. The end of the connecting post 51 passes through the self-locking piece 5. The two ends of the self-locking piece 5 are respectively fitted onto two gear shafts 2 with a gap. Two pairs of slots 52 are provided on the self-locking end face (i.e., the left end face of the self-locking piece 5). The two pairs of slots 52 are respectively arranged around the two gear shafts 2. A self-locking wheel 6 is elastically connected and axially slidably fitted on each gear shaft 2. A pair of protrusions 61 are provided on the self-locking end face (i.e., the right end face of the self-locking wheel 6). The pair of protrusions 61 on the same self-locking wheel 6 can engage with the self-locking piece 5. The two self-locking wheels 6 and the self-locking plate 5 cooperate to realize the concave and convex limiting self-locking function. Each self-locking wheel 6 is elastically connected to the corresponding gear shaft 2 through multiple spring pieces 7. All spring pieces 7 are stacked and axially slidably sleeved on the corresponding gear shaft 2. A nut 71 is threadedly fixed to the left end of the gear shaft 2. Multiple spring pieces 7 on the same gear shaft 2 are located between the nut 71 and the protrusion 61 so that the self-locking wheel 6 can be elastically slidably connected to the corresponding gear shaft 2. Each friction plate 41, connecting plate 4, self-locking wheel 6 and spring piece 7 are all sleeved on the end of the corresponding gear shaft 2 with a plane 22.

[0028] Reference Figure 6 , Figure 8 , Figure 9 and Figure 10 The self-locking plate 5 is located outside the wheel seat 3 and sandwiched between it and the wheel seat 3. Multiple pairs of friction plates 41 are sandwiched between them. The same pair of friction plates 41 are axially slidably sleeved on two gear shafts 2. A connecting plate 4 is provided between two adjacent pairs of friction plates 41. Each connecting plate 4 is sleeved on the two gear shafts 2 with a gap.

[0029] Reference Figures 1 to 10 In the dual-gear shaft screen shaft 8 of this utility model, when the user rotates one of the gear shafts 2 in the forward direction, the cylindrical gear 33 reverses, driving the other gear shaft 2 to reverse as well. At this time, the rotation directions of the two gear shafts 2 are opposite, adjusting the angle between the two fixing plates 21. During the reverse rotation of the two gear shafts 2, each friction plate 41, the two self-locking wheels 6, and the two nuts 71 rotate together with their respective gear shafts 2. The two gear shafts 2 rotate relative to the outer shell 1, the wheel seat 3, the multiple connecting plates 4, and the self-locking plates 5. The multiple spring plates 7 on the same gear shaft 2 slide along the axial direction of the gear shaft 2, allowing the self-locking wheel 6 to slide elastically along the axial direction of the gear shaft 2. When the self-locking wheel 6 rotates to a certain position with the corresponding gear shaft 2, the two protrusions 61 on the self-locking wheel 6 engage with the corresponding two slots 52 on the self-locking plate 5, locking the self-locking wheel 6 and the self-locking plate 5, thus achieving the self-locking function.

[0030] This utility model discloses a dual-gear shaft screen shaft 8, which ingeniously combines two gear shafts 2 with a cylindrical gear 33 to form a highly efficient and stable transmission mechanism. Specifically, the dual-gear shaft screen shaft 8 includes a robust housing 1 and two spaced-apart gear shafts 2. One end of each gear shaft 2 extends into the housing 1 and is rotatably connected to it, ensuring stability and smoothness during rotation. The other end of the gear shaft 2 extends out of the housing 1, forming a connecting end for easy connection to external structures (such as display screens, folding panels, etc.). A wheel seat 3 is mounted on both gear shafts 2, located inside the housing 1, serving to support and fix the cylindrical gear 33. The cylindrical gear 33 is located between the two gear shafts 2 and meshes with them. This design allows the other gear shaft 2 to rotate synchronously when one gear shaft 2 is subjected to external force, through the meshing relationship between the cylindrical gear 33 and the other gear shaft 2. This transmission method not only achieves synchronous movement between the two gear shafts 2, but also endows the double-gear shaft screen shaft 8 with good self-locking performance and high transmission accuracy through the meshing characteristics of the cylindrical gear 33 and the gear shaft 2. The double-gear shaft screen shaft 8 of this utility model has the following significant advantages: ① Compact structure: The ingenious combination of the two gear shafts 2 and the cylindrical gear 33 achieves a compact and efficient structure, reducing unnecessary space and material waste; ② High adjustment accuracy: The meshing relationship between the cylindrical gear 33 and the gear shaft 2 ensures high precision in the transmission process, enabling the double-gear shaft screen shaft 8 to achieve precise angle adjustment; ③ Good stability: The design of the double gear shaft 2 enhances the load-bearing capacity of the double-gear shaft screen shaft 8, enabling it to maintain stable operation even under large loads.

[0031] In summary, the dual-gear shaft screen hinge 8 design of this utility model not only solves the shortcomings of existing screen hinges in terms of adjustment accuracy, stability and load-bearing capacity, but also realizes flexible, stable and precise relative movement between screens through innovative design ideas, providing a new technical path and solution for display devices, foldable electronic devices and mechanical devices that require precise angle adjustment.

[0032] Reference Figure 1 , Figure 2 and Figure 11A dual-screen display includes a support plate 92 and two screens, specifically a main screen 9 and a secondary screen 91. The support plate 92 is located between the main screen 9 and the secondary screen 91. Both ends of the support plate 92 are rotatably connected to the main screen 9 and the secondary screen 91 via a dual-gear shaft screen axis 8. Specifically, two fixing plates 21 of one dual-gear shaft screen axis 8 are fixed to one end of the support plate 92 and the interior of the main screen 9, respectively, allowing the main screen 9 to rotate relative to one end of the support plate 92. The other dual-gear shaft screen axis 8 has two fixing plates 21 fixed to... The other end of the support plate 92 and the interior of the secondary screen 91 allow the secondary screen 91 to rotate relative to the other end of the support plate 92. The cable of the main screen 9 passes through the two cable holes 111 and the cable routing cavity 121 corresponding to the double gear shaft screen axis 8, bypasses the support plate 92, and then passes through the two cable holes 111 and the cable routing cavity 121 corresponding to the double gear shaft screen axis 8 of the secondary screen 91, thus connecting to the secondary screen 91. Manually rotating the main screen 9 and the secondary screen 91 will create a certain angle between them (the display areas of both the main screen 9 and the secondary screen 91 face outwards, such as...). Figure 11 (As shown), so that people sitting on two opposite sides can watch at the same time.

[0033] In this dual-screen display, the two ends of the support plate 92 are rotatably connected to the two screens via the aforementioned dual-gear shaft screen hinge 8. Within the same dual-gear shaft screen hinge 8, one gear shaft 2 is fixedly connected to the screen at its connecting end, while the other gear shaft 2 is fixedly connected to the support plate 92 at its connecting end. This design allows users to easily adjust the angle and layout of the screens as needed, whether they are laid out horizontally, stacked vertically, or placed at an angle. Furthermore, due to the high-strength material and precision manufacturing process of the dual-gear shaft screen hinge 8, the display maintains stable operation even under significant torque or load, further enhancing its durability and reliability.

[0034] This invention not only solves the shortcomings of existing screen axes and dual-screen displays in terms of structural complexity, stability, adjustment precision, and load capacity, but also achieves flexible, stable, and safe relative movement between screens through innovative design, providing a new technical path and solution for the development of dual-screen and even multi-screen displays.

[0035] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A double-gear shaft screen hinge, characterized in that, The device includes a housing and two spaced-apart gear shafts. One end of each gear shaft extends into the housing and is rotatably connected to it. The other end of each gear shaft extends out of the housing to form a connecting end. A wheel seat is mounted on both gear shafts. The wheel seat is located inside the housing. A cylindrical gear is rotatably mounted inside the wheel seat. The cylindrical gear is located between the two gear shafts and meshes with the gear segments of the two gear shafts.

2. The dual-gear shaft screen hinge according to claim 1, characterized in that, A self-locking plate is positioned and connected inside the outer shell. The self-locking plate is sleeved on the two gear shafts with a gap. A self-locking wheel is elastically connected and axially slidably sleeved on each gear shaft. The two self-locking wheels are self-locked with the self-locking plate in a concave-convex limiting position.

3. The dual-gear shaft screen hinge according to claim 2, characterized in that, The self-locking wheel has a protrusion on its self-locking end face, and the self-locking plate has a groove on its self-locking end face for engaging with the protrusion.

4. The dual-gear shaft screen hinge according to claim 2, characterized in that, The self-locking wheel is elastically connected to the corresponding gear shaft through multiple spring pieces, and all the spring pieces are stacked and axially slidably sleeved on the corresponding gear shaft.

5. The dual-gear shaft screen hinge according to claim 2, characterized in that, The self-locking plate is located outside the wheel seat and sandwiched between it and the wheel seat. Multiple pairs of friction plates are sandwiched between them. The same pair of friction plates are axially slidably sleeved on the two gear shafts respectively.

6. The dual-gear shaft screen hinge according to claim 5, characterized in that, A connecting piece is provided between two adjacent pairs of friction plates, and the connecting piece is sleeved on the two gear shafts.

7. The dual-gear shaft screen hinge according to claim 2, characterized in that, The housing is divided into a wiring cavity and a rotating cavity by a partition. The wheel seat is located in the rotating cavity. The rotating ends of the two gear shafts are located in the rotating cavity and are rotatably connected to the partition. The partition is positioned and connected to the self-locking plate by a connecting post.

8. The dual-gear shaft screen shaft according to claim 1, characterized in that, The wheel seat includes a seat body and a connecting strip. The seat body is U-shaped and its two ends are fitted onto the two gear shafts. The connecting strip covers the opening of the seat body and engages with the seat body. The engaging grooves at both ends of the connecting strip engage with the two gear shafts one by one.

9. The dual-gear shaft screen hinge according to claim 1, characterized in that, The wiring end cover of the housing is provided with a wire pass plug, and the wire pass plug is provided with two wire pass holes. The two wire pass holes are connected to the wiring cavity inside the housing. The connecting ends of the two gear shafts are respectively fixedly connected with fixing plates, and the two fixing plates are located outside the housing.

10. A dual screen display, characterised in that, It includes a support plate and two screens, the support plate being located between the two screens, and both ends of the support plate being rotatably connected to the two screens via a double gear shaft screen shaft as described in any one of claims 1-9.

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