Hinge rotation positioning structure

Abstract

This utility model relates to a hinge rotation positioning structure, comprising: a connecting shaft, a free bracket, a fixed bracket, and a pad; the connecting shaft includes a shaft rod and an end cap; the shaft rod has two curved sections and two flat sections; the free bracket has an irregularly shaped through hole, and the inner wall of the irregularly shaped through hole has two mating surfaces and two limiting surfaces; the mating surfaces are used to fit the curved sections of the shaft rod, and the limiting surfaces are used to abut the flat sections of the shaft rod. The above-mentioned hinge rotation positioning structure is simple in structure and easy to use. It eliminates the traditional stop plate design. The irregularly shaped through hole on the free bracket utilizes the special opening shape of the through hole to achieve rotation positioning of the shaft rod, concentrating the force point in the rotation center area of ​​the hinge, fundamentally avoiding the generation of eccentric torque, effectively ensuring the stability and smoothness of the hinge opening and closing process, significantly improving the user's operating feel, while reducing local wear between components, and greatly improving the service life and structural reliability of the hinge.

Description

Technical Field

[0001] This utility model relates to the field of hinge rotation positioning technology, and in particular to a hinge rotation positioning structure. Background Technology

[0002] Hinges, as a core basic connecting component of electronic products, are widely used in products that require rotation and angle limitation, such as laptops, foldable screen terminals, clamshell components of portable devices, and smart terminal stands. In existing technology, hinges generally adopt a side-mounted locking structure design, that is, a stop block is protruding on the side of the stop plate, which limits the rotation angle by contacting the mating part of the hinge.

[0003] However, because the stress point is located on the outside of the stop plate, this design generates an unstable eccentric torque during rotation, causing jamming, resistance, or sudden loosening during opening and closing, severely affecting the user's operating feel. More seriously, long-term asymmetrical external force will exacerbate local wear on the locking structure and mating parts, leading to failure problems such as stop plate deformation and wear of the locking protrusion, ultimately resulting in a shortened hinge life and reduced reliability. Utility Model Content

[0004] Based on this, the present invention provides a hinge rotation positioning structure, which is simple in structure and easy to use. It eliminates the traditional stop plate design and provides irregularly shaped through holes on the free bracket. The special opening shape of the irregularly shaped through holes realizes the rotation positioning of the shaft, so that the force point is concentrated in the rotation center area of ​​the hinge, which fundamentally avoids the generation of eccentric torque, effectively ensures the stability and smoothness of the hinge opening and closing process, significantly improves the user's operating feel, reduces local wear between components, and greatly improves the service life and structural reliability of the hinge.

[0005] To achieve the objectives of this utility model, the following technical solution is adopted: A hinge rotation positioning structure includes: a connecting shaft, a free support, a fixed support located on one side of the free support, and a pad sandwiched between the fixed support and the free support; the positions of the connecting shaft, the fixed support, and the pad are relatively fixed, while the free support and the connecting shaft can rotate relative to each other; the connecting shaft includes a shaft rod and an end cap connected to one end of the shaft rod; the cross-section of the shaft rod is a rounded rectangle, so that the shaft rod has two curved surface segments and two flat surface segments arranged in a centrally symmetrical manner; the free support is provided with an irregularly shaped through hole, and the inner wall of the irregularly shaped through hole is provided with two mating surfaces arranged in a centrally symmetrical manner, and limiting surfaces extending outward from opposite ends of each mating surface; the limiting surfaces at opposite ends of one mating surface are connected one-to-one with the limiting surfaces at opposite ends of the other mating surface; the mating surfaces are used to fit the curved surface segments of the shaft rod, and the limiting surfaces are used to abut against the flat surface segments of the shaft rod to limit the rotation range of the shaft rod.

[0006] The aforementioned hinge rotation positioning structure is simple in structure and easy to use. It eliminates the traditional stop plate design and features irregularly shaped through holes on the free bracket. The special opening shape of these through holes enables the rotation positioning of the shaft, concentrating the force point in the center of the hinge's rotation. This fundamentally avoids the generation of eccentric torque, effectively ensuring the stability and smoothness of the hinge's opening and closing process, significantly improving the user's operating feel, reducing local wear between components, and greatly improving the hinge's service life and structural reliability.

[0007] In one embodiment, viewed from a cross-sectional perspective, the mating surface is a concave arc shape, and the arc length of the mating surface is greater than the arc length of the curved section of the shaft.

[0008] In one embodiment, two connected limiting surfaces intersect to form a vertex angle θ, the two vertex angles θ are centrally symmetrical about the center of the irregular through hole, and the vertex angle θ abuts the middle of the planar section of the shaft.

[0009] In one embodiment, the vertex angle θ is an obtuse angle.

[0010] In one embodiment, the fixed bracket is provided with a first through hole, which is coaxially opposite to the irregular through hole; the opening profile of the first through hole is consistent with the outer peripheral profile of the shaft, and the first through hole is used for the shaft to pass through.

[0011] In one embodiment, the pad has a second through hole in the middle, which is coaxially opposite to the irregular through hole; the opening profile of the second through hole is consistent with the outer peripheral profile of the shaft, and the second through hole is used for the shaft to pass through. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of a hinge rotation positioning structure according to an embodiment of the present invention. Figure 2 for Figure 1 A three-dimensional schematic diagram of the hinge rotation positioning structure shown from another perspective; Figure 3 for Figure 1 An exploded view of the hinge rotation positioning structure shown. Figure 4 for Figure 3 A three-dimensional schematic diagram of the free support in the hinge rotation positioning structure shown; Figure 5 for Figure 4 Side view of the free support in the hinged rotary positioning structure shown; Figure 6 for Figure 1 A cross-sectional view of the hinge rotation positioning structure shown.

[0013] Attached image annotations: 10-Connecting shaft, 11-Shaft rod, 12-End cap; 20-Free bracket, 21-Irregular through hole, 22-Mating surface, 23-Limiting surface; 30 - Fixed bracket, 31 - First through hole; 40 - Pad, 41 - Second through hole. 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 6 This invention provides a hinge rotation positioning structure comprising a connecting shaft 10, a free support 20, a fixed support 30 located on one side of the free support 20, and a pad 40 sandwiched between the fixed support 30 and the free support 20. The connecting shaft 10 is used to pass through and connect the fixed support 30, the free support 20, and the pad 40 to achieve stable assembly of the entire hinge rotation positioning structure. The positions of the connecting shaft 10, the fixed support 30, and the pad 40 are relatively fixed, while the free support 20 and the connecting shaft 10 can rotate relative to each other, allowing the free support 20 to rotate relative to the fixed support 30.

[0018] The connecting shaft 10 includes a shaft 11 and an end cap 12 connected to one end of the shaft 11. The shaft 11 is used to pass through the connecting fixed bracket 30, the free bracket 20, and the pad 40. The end cap 12 is used to abut against the side of the free bracket 20 facing away from the pad 40, serving as an axial limit. In actual assembly, the shaft 11 can be fixedly connected to the fixed bracket 30, the free bracket 20, and the pad 40 by interference fit, or by installing a retaining spring on the end of the shaft 11 extending out of the fixed bracket 30.

[0019] In this embodiment, the cross-section of the shaft 11 is a rounded rectangle, so that the shaft 11 has two curved surface segments and two planar segments arranged in a centrally symmetrical manner.

[0020] The free support 20 is provided with irregularly shaped through holes 21, such as Figure 4 and Figure 5 As shown, the inner wall of the irregular through hole 21 is provided with two mating surfaces 22 arranged in a centrally symmetrical manner, and limiting surfaces 23 extending outward from opposite ends of each mating surface 22; the limiting surfaces 23 at opposite ends of one mating surface 22 are connected one-to-one with the limiting surfaces 23 at opposite ends of the other mating surface 22, together forming a closed-out hollow area, which is the irregular through hole 21 in this embodiment.

[0021] Combination Figure 4 and Figure 6 To understand this, from a cross-sectional perspective, the mating surface 22 is a concave arc-shaped surface. The mating surface 22 is used to fit the curved section of the shaft 11, and the arc length of the mating surface 22 is greater than the arc length of the curved end of the shaft 11 to ensure the rotational stability of the shaft 11. The limiting surface 23 is a plane, and the limiting surface 23 is used to abut against the plane section of the shaft 11 to limit the rotation range of the shaft 11.

[0022] In this embodiment, combined with Figure 5 To understand this, from a side view, the outlines of the two mating surfaces 22 are centrally symmetrical about the center of the irregular through hole 21, and the center of the outlines of the two mating surfaces 22 coincides with the center of the irregular through hole 21. That is, the outlines of the two mating surfaces 22 are concentric, so that the two mating surfaces 22 fall on the outer circumferential surface of the same cylinder, ensuring uniform force distribution.

[0023] Furthermore, the two connected limiting surfaces 23 intersect to form a vertex angle θ. The two vertex angles θ are centrally symmetrical about the center of the irregular through hole 21, and the vertex angle θ abuts the middle of the planar section of the shaft 11, providing guidance and limiting for the smooth rotation of the shaft 11.

[0024] In this embodiment, as Figure 5 As shown, the vertex angle θ is an obtuse angle.

[0025] The fixed bracket 30 is provided with a first through hole 31, which is coaxially opposite to the irregular through hole 21. The opening contour of the first through hole 31 is consistent with the outer circumferential contour of the shaft 11. The first through hole 31 is used for the shaft 11 to pass through, so that the fixed bracket 30 and the connecting shaft 10 are relatively fixed.

[0026] The pad 40 is a circular pad with a second through hole 41 in the middle. The second through hole 41 is coaxially opposite to the irregular through hole 21. The opening contour of the second through hole 41 is consistent with the outer circumferential contour of the shaft 11. The second through hole 41 is used for the shaft 11 to pass through, so that the position of the pad 40 and the connecting shaft 10 is relatively fixed. Therefore, the positions of the connecting shaft 10, the fixing bracket 30, and the pad 40 are relatively fixed.

[0027] The aforementioned hinge rotation positioning structure is simple in structure and easy to use. It eliminates the traditional stop plate design and provides an irregularly shaped through hole 21 on the free bracket 20. The special opening shape of the irregularly shaped through hole 21 is used to achieve rotation positioning of the shaft 11, so that the force point is concentrated in the rotation center area of ​​the hinge, which fundamentally avoids the generation of eccentric torque, effectively ensures the stability and smoothness of the hinge opening and closing process, significantly improves the user's operating feel, reduces local wear between components, and greatly improves the service life and structural reliability of the hinge.

[0028] 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.

[0029] 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 hinge rotation positioning structure, characterized in that, include: Connecting shaft, free bracket, fixed bracket located on one side of the free bracket, and pad between the fixed bracket and the free bracket; The connecting shaft, fixed bracket, and pad are relatively fixed in position, while the free bracket and connecting shaft can rotate relative to each other. The connecting shaft includes a shaft rod and an end cap connected to one end of the shaft rod. The cross-section of the shaft rod is a rounded rectangle, giving it two centrally symmetrical curved sections and two flat sections. The free bracket has an irregularly shaped through hole, and the inner wall of the irregularly shaped through hole has two centrally symmetrically shaped mating surfaces and limiting surfaces extending outward from opposite ends of each mating surface. The limiting surfaces at opposite ends of one mating surface are connected one-to-one with the limiting surfaces at opposite ends of the other mating surface. The mating surfaces are used to fit the curved sections of the shaft rod, and the limiting surfaces are used to abut against the flat sections of the shaft rod to limit the rotation range of the shaft rod.

2. The hinge rotation positioning structure according to claim 1, characterized in that, From a cross-sectional perspective, the mating surface is a concave arc, and the arc length of the mating surface is greater than the arc length of the curved section of the shaft.

3. The hinge rotation positioning structure according to claim 1, characterized in that, The two connected limiting surfaces intersect to form a vertex angle θ. The two vertex angles θ are centrally symmetrical about the center of the irregular through hole, and the vertex angle θ abuts the middle of the planar section of the shaft.

4. The hinge rotation positioning structure according to claim 1, characterized in that, The vertex angle θ is an obtuse angle.

5. The hinge rotation positioning structure according to claim 1, characterized in that, The fixed bracket is provided with a first through hole, which is coaxially opposite to the irregular through hole; the opening profile of the first through hole is consistent with the outer circumferential profile of the shaft, and the first through hole is used for the shaft to pass through.

6. The hinge rotation positioning structure according to claim 1, characterized in that, The pad has a second through hole in the middle, which is coaxially opposite to the irregular through hole; the opening profile of the second through hole is consistent with the outer circumferential profile of the shaft, and the second through hole is used for the shaft to pass through.

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