Composite fold parallel hinge

Abstract

The utility model relates to a kind of composite folding parallel hinge, including support, rotatable connection pivot of the opposite sides of one end of support, rotatable connection first connecting rod in the opposite sides of middle part of support, coaxially connect the second connecting rod of each pivot, and two load plates are oppositely arranged. First connecting rod and second connecting rod one-to-one correspondence, load plate is rotatably clamped between first connecting rod and second connecting rod. The above-mentioned composite folding parallel hinge, simple structure, convenient to use, through the double support surface of first connecting rod, the double supporting surface design of second connecting rod, the cooperative orientation of guide groove and matching hole, ensure that load plate always keeps parallel during folding process, can adapt to the different morphological needs of keyboard computer and keyboardless computer, improve folding degree of freedom, avoid uneven extrusion to screen, effectively prolong equipment structure strength and screen service life.

Description

Technical Field

[0001] This utility model relates to the field of folding hinge technology, and in particular to a composite folding parallel hinge. Background Technology

[0002] Currently, traditional laptop hinges are mostly based on single-axis or multi-axis rotating structures. When the device is closed, they typically only allow the screen (B-side) to fit against the keyboard base (C-side). However, the carrier plates on the hinge arms connecting the two are often at an angle and not strictly parallel. This non-parallelism can lead to uneven overall thickness of the device after closure, and long-term use can cause stress concentration at the carrier plate connection points, affecting structural strength. In addition, existing hinges are generally designed for a single opening range and cannot adapt to the folding requirements of devices with different form factors.

[0003] In particular, foldable laptops are gaining popularity, eliminating the traditional keyboard area (C-side) and connecting the two display sections solely through hinges. These devices not only need to protect the screen when closed but also often require further folding to reduce size or enter specific protection modes. However, traditional laptop hinges lack the corresponding folding freedom in such scenarios, preventing further folding after closing; even if some hinges support larger bending angles, they often cause the two side panels to lose their parallelism, potentially resulting in uneven pressure on the screen and affecting its lifespan. Utility Model Content

[0004] Based on this, the present invention provides a composite folding parallel hinge with a simple structure and convenient use. Through the design of the double support surface of the first link and the double bearing surface of the second link, combined with the coordinated guidance of the guide groove and the mating hole, it ensures that the carrier plate always remains parallel during the folding process. It can adapt to the different form requirements of computers with and without keyboards, improve the degree of freedom of folding, avoid uneven compression of the screen, and effectively extend the structural strength of the device and the service life of the screen.

[0005] To achieve the objectives of this utility model, the following technical solution is adopted: A composite folding parallel hinge, comprising: support; A rotatable connecting bracket with rotating shafts on both sides; A first connecting rod is rotatably connected to the opposite sides of the middle of the bracket; a first support surface and a second support surface are provided on the inner surface of the first connecting rod; a through hole with a circular hole is provided on the end of the first connecting rod away from the bracket; and guide grooves with arc-shaped grooves are provided on the opposite sides of the first connecting rod corresponding to the through hole. A second connecting rod coaxially connects each rotating shaft; a first supporting surface and a second supporting surface are provided on the inner surface of the second connecting rod; a through hole with a straight groove is provided on the end of the second connecting rod away from the rotating shaft, and the through hole and the via hole are correspondingly provided; mating holes are provided on the two opposite sides of the second connecting rod corresponding to the through hole, and the mating holes and the guide grooves are corresponding one by one. Two carrier plates are arranged opposite each other; the carrier plates are rotatably clamped between the first connecting rod and the second connecting rod; the carrier plates are provided with a first through hole in the shape of a circular hole, and the first through hole and the through hole are respectively corresponding to each other and are concentrically arranged; the carrier plates are provided with second through holes in the shape of circular holes on the opposite sides of the first through hole, and the second through holes and the guide grooves are respectively corresponding to each other; the axial positioning is achieved by using a connecting pin to pass through the through hole, the first through hole and the through hole in sequence and then fastening the snap ring; the axial positioning is achieved by using a connecting pin to pass through the mating hole, the second through hole and the guide groove and then fastening the snap ring, so as to complete the assembly of the carrier plates with the first connecting rod and the second connecting rod.

[0006] The aforementioned composite folding parallel hinge has a simple structure and is easy to use. Through the design of the double support surface of the first link and the double bearing surface of the second link, combined with the coordinated guidance of the guide groove and the mating hole, it ensures that the carrier plate always remains parallel during the folding process. It can adapt to the different form requirements of computers with and without keyboards, improve the degree of freedom of folding, avoid uneven compression of the screen, and effectively extend the structural strength of the device and the service life of the screen.

[0007] In one embodiment, the angle between the first support surface and the second support surface is an obtuse angle.

[0008] In one embodiment, the angle between the first support surface and the second support surface is an obtuse angle.

[0009] In one embodiment, the center of the groove trajectory of the guide groove coincides with the center of the through hole.

[0010] In one embodiment, the center of the first through hole and the centers of the two second through holes are concentric circles.

[0011] In one embodiment, the composite folding parallel hinge further includes a synchronous gear coaxially connected to each rotating shaft, a transmission gear meshing with one side of the synchronous gear, a support plate sleeved on the two rotating shafts, a cam plate sleeved on the two rotating shafts, cams coaxially connected to each rotating shaft, spring plates sleeved on each rotating shaft, and a nut connected to the end of each rotating shaft away from the support; one end of the transmission gear is rotatably connected to the support, and the other end of the transmission gear is rotatably connected to the support plate; the two transmission gears mesh with each other; the spring plate elastically abuts against the cam, so that the cam meshes with the cam plate. Attached Figure Description

[0012] Figure 1This is a three-dimensional schematic diagram of a composite folding parallel hinge according to one embodiment of the present invention. Figure 2 for Figure 1 An exploded view of the compound folded parallel hinge shown. Figure 3 for Figure 1 An exploded view of the compound folded parallel hinge shown from another perspective; Figure 4 for Figure 3 The front view of the first link in the compound folding parallel hinge shown; Figure 5 for Figure 3 The front view of the second link in the compound folding parallel hinge shown; Figure 6 for Figure 2 The diagram shows a partial half-section of the composite folded parallel hinge, excluding the carrier plate. Figure 7 for Figure 1 The image shows a state view of the application of a compound folding parallel hinge in a computer with a keyboard. Figure 8 for Figure 1 The diagram shows another perspective on the application of the composite folding parallel hinge in a computer with a keyboard. Figure 9 for Figure 1 The image shows a state view of the application of a compound folding parallel hinge in a keyboardless computer. Figure 10 for Figure 9 The diagram shows another perspective on the application of the composite folding parallel hinge in a keyboardless computer.

[0013] Attached image annotations: 10-Bracket, 11-Bracket base, 12-Bracket cover; 20-Shaft, 21-Synchronizing gear, 22-Transmission gear, 23-Support plate, 24-Cam plate, 25-Cam, 26-Spring plate, 27-Nut; 30-First connecting rod, 31-First support surface, 32-Second support surface, 33-Through hole, 34-Guide groove, 35-Hinge plate; 40 - Second connecting rod, 41 - First supporting surface, 42 - Second supporting surface, 43 - Through hole, 44 - Mating hole; 50 - Carrier plate, 51 - First through hole, 52 - Second through hole, 53 - Connecting pin, 54 - Snap ring. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0015] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0017] Please see Figures 1 to 10 This invention relates to a composite folding parallel hinge, comprising a bracket 10, pivots 20 rotatably connecting opposite sides of one end of the bracket 10, a first connecting rod 30 rotatably connecting opposite sides of the middle portion of the bracket 10, a second connecting rod 40 coaxially connecting each pivot 20, and two opposing carrier plates 50. The first connecting rod 30 and the second connecting rod 40 correspond one-to-one, and the carrier plates 50 are rotatably clamped between the first connecting rod 30 and the second connecting rod 40. The inner surface of the carrier plate 50 is the working surface, used to abut against and support the B and C surfaces of the computer.

[0018] The bracket 10 includes a bracket base 11 and a bracket cover plate 12 that matches and connects to the bracket base 11. After the bracket base 11 and the bracket cover plate 12 are engaged, they are used to clamp one end of the rotating shaft 20, so that the rotating shaft 20 can be rotatably connected to the bracket 10.

[0019] In this embodiment, there is an arc-shaped inner groove (not shown) between the bracket base 11 and the bracket cover plate 12. The inner groove is used to accommodate one end of the first connecting rod 30 to realize the rotatable connection between the bracket 10 and the first connecting rod 30.

[0020] The inner surface of the first connecting rod 30 is provided with a first support surface 31 and a second support surface 32, and the included angle between the first support surface 31 and the second support surface 32 is an obtuse angle. In actual operation, the first support surface 31 or the second support surface 32 can be switched to be parallel to the working surface of the carrier plate 50 by changing the folding state, thereby adapting to computers with or without keyboards.

[0021] Specifically, such as Figures 3 to 6As shown, the first connecting rod 30 has a through hole 33 in the shape of a circular hole at the end away from the bracket 10. On the opposite sides of the through hole 33, the first connecting rod 30 has guide grooves 34 in the shape of arc-shaped grooves. The groove trajectory of the guide grooves 34 (see...) Figure 4 The center of the arc-shaped dashed line coincides with the center of the through hole 33 to ensure the consistency of the motion trajectory.

[0022] In this embodiment, the first connecting rod 30 is connected to a hinge plate 35 with an arc shape at one end of the bracket 10. The hinge plate 35 is fitted into the inner groove, and the first connecting rod 30 and the bracket 10 are rotatably connected through the sliding fit of the arc surface.

[0023] The inner surface of the second connecting rod 40 is provided with a first supporting surface 41 and a second supporting surface 42, and the included angle between the first supporting surface 41 and the second supporting surface 42 is an obtuse angle. In actual operation, the first supporting surface 41 or the second supporting surface 42 can be switched to be parallel to the working surface of the carrier plate 50 by changing the folding state, thereby adapting to computers with or without keyboards.

[0024] Specifically, such as Figures 3 to 6 As shown, the second connecting rod 40 has a through hole 43 arranged in a straight groove at the end away from the rotating shaft 20. The through hole 43 is corresponding to the through hole 33. The second connecting rod 40 has mating holes 44 on opposite sides of the through hole 43, and the mating holes 44 correspond one-to-one with the guide grooves 34.

[0025] The carrier plate 50 has a first through hole 51 in the form of a circular hole, which corresponds one-to-one with the through hole 33 and is concentrically arranged. On opposite sides of the first through hole 51, the carrier plate 50 has second through holes 52 in the form of circular holes, which correspond one-to-one with the guide groove 34. Figure 1 and Figure 2 The assembly of the carrier plate 50 with the first connecting rod 30 and the second connecting rod 40 is completed by using the connecting pin 53 to pass through the through hole 43, the first through hole 51, and the through hole 33, and then engaging the snap ring 54 for axial positioning. Similarly, the assembly of the carrier plate 50 with the first connecting rod 30 and the second connecting rod 40 is completed by using the connecting pin 53 to pass through the mating hole 44, the second through hole 52, and the guide groove 34, and then engaging the snap ring 54 for axial positioning. After assembly, the carrier plate 50 can rotate to a certain extent relative to the first connecting rod 30 and the second connecting rod 40, allowing for flexible switching between different closed states, thus adapting to computers with or without keyboards.

[0026] In this embodiment, the center of the first through hole 51 and the centers of the two second through holes 52 are concentric circles, ensuring balanced force during rotation.

[0027] Please see Figure 7 and Figure 8The figure shows a half-sectional view of the application state of the composite folding parallel hinge adapted to a computer with a keyboard in this embodiment. The first support surface 31 and the first supporting surface 41 are both on the same plane as the working surface of the carrier plate 50, and the working surfaces of the two carrier plates 50 are kept parallel to each other. At this time, the space between the two carrier plates 50 clamps the B and C surfaces of the computer with the keyboard, achieving stable support.

[0028] Please see Figure 9 and Figure 10 The figure shows a half-section view of the application state of the composite folding parallel hinge adapted to a keyboardless computer in this embodiment. The second support surface 32 and the second support surface 42 are both on the same plane as the working surface of the carrier plate 50, and the working surfaces of the two carrier plates 50 are parallel to each other. At this time, the space between the two carrier plates 50 clamps the B and C surfaces of the keyboardless computer, achieving stable support.

[0029] When the composite folding parallel hinge in this embodiment is adapted to a computer without a keyboard, the total thickness of the computer's B and C sides becomes thinner, which is equivalent to the composite folding parallel hinge in... Figure 7 Based on the state shown, it is further folded inward. The specific inward folding process is as follows: Driven by an external force, the first connecting rod 30 rotates inward around the axis of the hinge plate 35, and the second connecting rod 40 rotates inward around the axis of the rotating shaft 20. The connecting pin 53, influenced by the carrier plate 50, slides along the arc-shaped trajectory of the guide groove 34 from the inner end to the outer end (away from the bracket 10), while simultaneously moving synchronously within the mating hole 44 to compensate for the displacement difference caused by the rotation of the first connecting rod 30 and the second connecting rod 40. Driven by the connecting pin 53, the carrier plate 50 rotates slightly relative to the first connecting rod 30 and the second connecting rod 40. However, because the groove trajectory of the guide groove 34 is concentric with the through hole 33, and the two second through holes 52 are concentric with the first through hole 51, the carrier plate 50 remains horizontal and will not tilt.

[0030] Fold inwards until the first link 30 rotates to the point where the second support surface 32 is perpendicular to the bracket cover plate 12, and the second link 40 rotates to the point where the second support surface 42 is perpendicular to the bracket cover plate 12. At this point, both the second support surface 32 and the second support surface 42 are coplanar with the working surface of the carrier plate 50. The two carrier plates 50 remain parallel, clamping the two display surfaces of the foldable screen computer to achieve the requirement of reducing the size, avoid uneven compression of the screen, and effectively extend the structural strength of the device and the service life of the screen.

[0031] In simple terms, the carrier plate 50 is rotatably clamped between the first link 30 and the second link 40. With the coordinated guidance of the guide groove 34 and the mating hole 44, the connecting pin 53 is provided with a space for movement, so that the first link 30 and the second link 40 can continue to fold inward. By switching the position of the connecting pin 53, the working surfaces of the two carrier plates 50 can still be kept parallel to each other.

[0032] Combination Figure 7 and Figure 9 To understand this, for the first link 30, during the inward folding process, the connecting pin 53, which is away from the bracket 10, slides from the inner end position of the guide groove 34 to the outer end position, while the connecting pin 52, which is close to the bracket 10, slides from the outer end position of the guide groove 34 to the inner end position.

[0033] Combination Figure 8 and Figure 10 To understand this, for the second link 40, during the inward folding process, the connecting pin 53 away from the bracket 10 slides from the inner end position of the mating hole 44 to the outer end position, and the connecting pin 53 close to the bracket 10 slides from the outer end position of the mating hole 44 to the inner end position.

[0034] Please refer to it again. Figure 6 The composite folding parallel hinge also includes a synchronous gear 21 coaxially connected to each rotating shaft 20, a transmission gear 22 meshing with one side of the synchronous gear 21, a support plate 23 sleeved on the two rotating shafts 20, a cam plate 24 sleeved on the two rotating shafts 20, a cam 25 coaxially connected to each rotating shaft 20, a spring plate 26 sleeved on each rotating shaft 20, and a nut 27 connected to the end of each rotating shaft 20 away from the bracket 10. One end of the transmission gear 22 is rotatably connected to the bracket 10, and the other end is rotatably connected to the support plate 23. The two transmission gears 22 mesh with each other, allowing the two synchronous gears 21 to rotate synchronously but in opposite directions, ensuring consistent folding action on both sides. The spring plate 26 elastically abuts against the cam 25, causing the cam 25 to mesh with the cam plate 24, providing rotational damping for the rotating shaft 20, thus enabling the hinge to hover at any angle.

[0035] The aforementioned composite folding parallel hinge has a simple structure and is easy to use. Through the design of the double support surface of the first link 30 and the double bearing surface of the second link 40, combined with the coordinated guidance of the guide groove 34 and the mating hole 44, it ensures that the carrier plate 50 remains parallel during the folding process. It can adapt to the different form requirements of computers with and without keyboards, improve the degree of freedom of folding, avoid uneven compression of the screen, and effectively extend the structural strength of the device and the service life of the screen.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A composite folding parallel hinge, characterized in that, include: support; A rotatable connecting bracket with rotating shafts on both sides; A first connecting rod is rotatably connected to the opposite sides of the middle of the bracket; a first support surface and a second support surface are provided on the inner surface of the first connecting rod; a through hole with a circular hole is provided on the end of the first connecting rod away from the bracket; and guide grooves with arc-shaped grooves are provided on the opposite sides of the first connecting rod corresponding to the through hole. A second connecting rod coaxially connects each rotating shaft; a first supporting surface and a second supporting surface are provided on the inner surface of the second connecting rod; a through hole with a straight groove is provided on the end of the second connecting rod away from the rotating shaft, and the through hole and the via hole are correspondingly provided; mating holes are provided on the two opposite sides of the second connecting rod corresponding to the through hole, and the mating holes and the guide grooves are corresponding one by one. Two carrier plates are arranged opposite each other; the carrier plates are rotatably clamped between the first connecting rod and the second connecting rod; the carrier plates are provided with a first through hole in the shape of a circular hole, and the first through hole and the through hole are respectively corresponding to each other and are concentrically arranged; the carrier plates are provided with second through holes in the shape of circular holes on the opposite sides of the first through hole, and the second through holes and the guide grooves are respectively corresponding to each other; the axial positioning is achieved by using a connecting pin to pass through the through hole, the first through hole and the through hole in sequence and then fastening the snap ring; the axial positioning is achieved by using a connecting pin to pass through the mating hole, the second through hole and the guide groove and then fastening the snap ring, so as to complete the assembly of the carrier plates with the first connecting rod and the second connecting rod.

2. The composite folding parallel hinge according to claim 1, characterized in that, The angle between the first support surface and the second support surface is an obtuse angle.

3. The composite folding parallel hinge according to claim 1, characterized in that, The angle between the first supporting surface and the second supporting surface is an obtuse angle.

4. The composite folding parallel hinge according to claim 1, characterized in that, The center of the groove trajectory of the guide groove coincides with the center of the through hole.

5. The composite folding parallel hinge according to claim 1, characterized in that, The center of the first through hole and the centers of the two second through holes are all concentric circles.

6. The composite folding parallel hinge according to claim 1, characterized in that, It also includes a synchronous gear coaxially connected to each rotating shaft, a transmission gear meshing with one side of the synchronous gear, a support plate sleeved on the two rotating shafts, a cam plate sleeved on the two rotating shafts, cams coaxially connected to each rotating shaft, spring plates sleeved on each rotating shaft, and nuts connected to the end of each rotating shaft away from the bracket; one end of the transmission gear is rotatably connected to the bracket, and the other end of the transmission gear is rotatably connected to the support plate; the two transmission gears mesh with each other; the spring plates elastically abut against the cams, so that the cams mesh with the cam plates.

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