Lockable hinge mechanism and study desk

Abstract

The utility model provides a lockable hinge mechanism and a study desk. The lockable hinge mechanism comprises a first supporting frame, two connecting shafts, a second supporting frame, two one-way bearings, two locking heads and a driving assembly. The two connecting shafts are arranged on the first supporting frame, do not rotate relative to the first supporting frame and can move on the first supporting frame in the axis direction of the connecting shafts. The second supporting frame can rotate around the axis of the connecting shaft. The two one-way bearings are coaxial and opposite in locking direction. Each locking head is arranged in the corresponding one-way bearing in a matched mode. And the driving assembly is used for synchronously driving the two connecting shafts to move away from or close to each other, so that each locking head is separated from or clamped into the corresponding one-way bearing. In the process that the second supporting frame rotates relative to the first supporting frame, the second supporting frame makes contact with and is matched with the outer wall of the connecting shaft all the time, so that abrasion between the second plate and the connecting shaft is reduced, the service life of parts is prolonged, and the stability in the using process is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of study desk accessories, specifically to a lockable hinge mechanism and a study desk. Background Technology

[0002] Patent CN222122023U discloses a locking structure including a first mounting base, two rotating components, a second mounting base, and an adjusting component. This locking structure has a stepless locking function, enabling adjustment of the included angle between the first and second mounting bases and locking at any position, making it easy to operate. The rotating components include a one-way bearing and a connecting column. The connecting column includes a first connecting segment, a second connecting segment, and a third connecting segment connected sequentially. The first connecting segment cooperates with the one-way bearing, the second connecting segment cooperates with the first mounting base, and the third connecting segment cooperates with the second mounting base.

[0003] However, in the aforementioned locking structure, the second side plate of the second mounting base has a second through hole that mates with the third connecting section. This second through hole is circular. The cross-section of the third connecting section, however, is non-circular (non-circular shapes can be triangles, quadrilaterals, polygons, or other regular or irregular shapes). Therefore, during the mating process with the second through hole, the third connecting section experiences accelerated wear, thus affecting the effectiveness of the locking structure. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a lockable hinge mechanism and a study table to reduce the wear of the connecting shaft, extend the service life of the parts, and improve the stability during use.

[0005] To achieve the above objectives, this utility model provides a lockable hinge mechanism, comprising a first support frame having two parallel and connected first plates; two cylindrical connecting shafts respectively disposed on the two first plates, wherein the connecting shafts do not rotate relative to the first plates and can move on the first plates along their own axial direction; and a second support frame having two parallel and connected second plates, each second plate corresponding to one first plate, wherein the second plate is movably connected to the corresponding connecting shaft and can rotate around the axis of the connecting shaft.

[0006] Two coaxial one-way bearings with opposite locking directions are respectively disposed on two second plates. The one-way bearings are located on the side of the second plate opposite to the first plate, and the axis of the one-way bearings coincides with the axis of the connecting shaft. Two locking heads are respectively disposed on the two connecting shafts. The locking heads are coaxially disposed with the connecting shafts, and each locking head is engaged in a corresponding one-way bearing. A drive assembly is used to synchronously drive the two connecting shafts to move away from each other, so that each locking head disengages from the corresponding one-way bearing, or to synchronously drive the two connecting shafts to move closer to each other, so that each locking head engages in the corresponding one-way bearing.

[0007] Preferably, the drive assembly includes a first rod, a reset unit, two second rods, and two connecting brackets; each second rod is disposed on a corresponding connecting shaft, with the end of the second rod near the connecting shaft and away from the locking head, and the axis of the second rod being perpendicular to the axis of the connecting shaft; the first rod is arranged parallel between the two second rods, and the axis of the first rod is spatially perpendicular to the axis of the connecting shaft; one end of each of the two connecting brackets is hinged to the first rod, and the other end of each connecting bracket is hinged to the corresponding connecting shaft via the second rod; the reset unit is used to apply a spring force to the two connecting shafts to reset them after the two connecting shafts move away from each other.

[0008] Preferably, the reset unit includes two springs, each spring being sleeved outside the corresponding connecting shaft, with the two ends of the spring abutting against the first plate and the second rod, respectively.

[0009] Preferably, the first plate has a guide cylinder on the side opposite to the second plate, the connecting shaft is movably fitted inside the guide cylinder and does not rotate relative to the guide cylinder; the end of the connecting shaft away from the locking head has an extension post, the extension post extends out of the guide cylinder, the second rod is disposed on the extension post, the spring is sleeved outside the extension post, and the two ends of the spring abut against the end wall of the guide cylinder and the second rod, respectively.

[0010] Preferably, the guide cylinder has a through hole at the end away from the first plate, the extension column conformally passes through the through hole, and the cross-section of the extension column is non-circular.

[0011] Preferably, the drive assembly further includes a pull rope, one end of which is connected to the first rod.

[0012] Preferably, the first support frame is provided with a limiting seat, the pull rope passes through the limiting seat, the pull rope is provided with a limiting head, and the limiting head can abut against the limiting seat.

[0013] This utility model also provides a study desk, including the above-mentioned lockable hinge mechanism.

[0014] The beneficial effects of this utility model are:

[0015] This utility model discloses a lockable hinge mechanism. Because the connecting shaft is cylindrical, the second support frame remains in contact with and engaged with the outer wall of the connecting shaft during its rotation relative to the first support frame. This reduces wear between the second plate and the connecting shaft, extends the service life of the components, and improves stability during use. Simultaneously, by operating the drive assembly, the two connecting shafts can move synchronously away from or towards each other, causing the two locking heads to engage or disengage with their corresponding one-way bearings. This achieves locking or unlocking between the first and second support frames, facilitating adjustment of the included angle between them.

[0016] This utility model also discloses a study table. By using the above-mentioned lockable hinge mechanism, the overall structure is stable and durable, and the tilt angle of the tabletop can be infinitely adjusted, making it easy to operate. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the lockable hinge mechanism provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the first support frame;

[0020] Figure 3 This is a schematic diagram of the second support frame;

[0021] Figure 4 This is a schematic diagram of the connecting shaft.

[0022] Figure 5 This is a schematic diagram of the structure where two connecting brackets mate.

[0023] Figure 6 This is a schematic diagram of the structure of the connecting frame and the connecting shaft.

[0024] Figure 7 This is a top view of the lockable hinge mechanism;

[0025] Figure 8 This is a cross-sectional schematic diagram of the lockable hinge mechanism;

[0026] Figure label:

[0027] 10. First support frame; 11. First plate; 12. Guide cylinder; 121. Through hole; 13. Limiting seat; 20. Connecting shaft; 21. Extension column; 30. Second support frame; 31. Second plate; 40. One-way bearing; 50. Locking head; 60. Drive assembly; 61. First rod; 62. Spring; 63. Second rod; 64. Connecting frame; 65. Pull rope; 651. Limiting head. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] like Figure 1-8 As shown, in one embodiment of this utility model, a lockable hinge mechanism is provided, including a first support frame 10, two connecting shafts 20, a second support frame 30, two one-way bearings 40, two locking heads 50, and a drive assembly 60. The first support frame 10 has two parallel and connected first plates 11, and two cylindrical connecting shafts 20 are respectively disposed on the two first plates 11. The connecting shafts 20 do not rotate relative to the first plates 11 and can move along their own axial direction on the first plates 11. The second support frame 30 has two parallel and connected second plates 31, each second plate 31 corresponding to one first plate 11. The second plate 31 is movably connected to the corresponding connecting shaft 20 and can rotate around the axis of the connecting shaft 20.

[0035] Two one-way bearings 40 are coaxial and lock in opposite directions. The two one-way bearings 40 are fixedly mounted on two second plates 31, with each bearing 40 located on the side of the second plate 31 opposite to the first plate 11. The axis of each one-way bearing 40 coincides with the axis of the connecting shaft 20. Two locking heads 50 are respectively mounted on the two connecting shafts 20, coaxially arranged with the connecting shafts 20. Each locking head 50 is fitted into a corresponding one-way bearing 40. The one-way bearings 40 are selected from one-way needle roller bearings, which are existing technology and will not be described further in this embodiment.

[0036] The drive assembly 60 is used to synchronously drive the two connecting shafts 20 to move away from each other, so that each locking head 50 disengages from the corresponding one-way bearing 40, or to synchronously drive the two connecting shafts 20 to move closer to each other, so that each locking head 50 engages with the corresponding one-way bearing 40.

[0037] In the initial state, the two locking heads 50 are respectively locked in the corresponding one-way bearings 40 (the locking heads 50 press against the needle rollers in the one-way bearings 40). Since the locking directions of the two one-way bearings 40 are opposite, they will interfere with each other. At this time, the first support frame 10 and the second support frame 30 cannot rotate, and the first support frame 10 and the second support frame 30 are in a locked state.

[0038] When the user operates the drive assembly 60 to synchronously drive the two connecting shafts 20 to move away from each other, each connecting shaft 20 will cause its corresponding locking head 50 to extend outward, thereby gradually disengaging the locking head 50 from the one-way bearing 40. Once both locking heads 50 have disengaged from their corresponding one-way bearings 40, the first support frame 10 and the second support frame 30 can be rotated (for example, the first support frame 10 and the two connecting shafts 20 rotate relative to the second support frame 30, or the second support frame 30 rotates relative to the first support frame 10 and the two connecting shafts 20), thereby adjusting the angle between the first support frame 10 and the second support frame 30.

[0039] After adjustment, the user operates the drive assembly 60 to bring the two connecting shafts 20 closer together. When each locking head 50 re-engages with the corresponding one-way bearing 40, the first support frame 10 and the second support frame 30 will be locked again.

[0040] This embodiment discloses a lockable hinge mechanism. Because the connecting shaft 20 is cylindrical, the second support frame 30 remains in contact with and engaged with the outer wall of the connecting shaft 20 during rotation relative to the first support frame 10. This reduces wear between the second plate 31 and the connecting shaft 20, extends the service life of the components, and improves stability during use. Simultaneously, by operating the drive assembly 60, the two connecting shafts 20 can move synchronously away from or towards each other, driving the two locking heads 50 to engage or disengage with the corresponding one-way bearings 40. This achieves locking or unlocking between the first support frame 10 and the second support frame 30, facilitating adjustment of the included angle between the first support frame 10 and the second support frame 30.

[0041] In one embodiment, the drive assembly 60 includes a first rod 61, a reset unit, two second rods 63, and two connecting brackets 64. Each second rod 63 is fixed to a corresponding connecting shaft 20, with the end of the second rod 63 near the connecting shaft 20 away from the locking head 50, and the axis of the second rod 63 perpendicular to the axis of the connecting shaft 20. The first rod 61 is arranged parallel to the two second rods 63, and the axis of the first rod 61 is spatially perpendicular to the axis of the connecting shaft 20. One end of each connecting bracket 64 is hinged to the first rod 61, and the other end of each connecting bracket 64 is hinged to the corresponding connecting shaft 20 via the second rod 63. The reset unit applies a spring force to the two connecting shafts 20 to reset them after they have moved away from each other. Specifically, the reset unit includes two springs 62, each spring 62 being sleeved on the outside of the corresponding connecting shaft 20, with both ends of the spring 62 abutting against the first plate 11 and the second rod 63, respectively.

[0042] When the angle between the first support frame 10 and the second support frame 30 needs to be adjusted, the user moves the first lever 61. The first lever 61 drives the two connecting frames 64 to simultaneously push the connecting shaft 20 outward. At this time, the two connecting shafts 20 move away from each other, thereby gradually disengaging the locking head 50 from the one-way bearing 40. During this process, the second lever 63 gradually compresses the spring 62, which then applies a spring force to the corresponding connecting shaft 20 so that the connecting shaft 20 can return to its original position. The structural design of the drive assembly 60 can simultaneously lock or unlock the first support frame 10 and the second support frame 30, with a simple structure and convenient operation.

[0043] In one embodiment, a guide cylinder 12 is fixedly installed on the side of the first plate 11 opposite to the second plate 31. The connecting shaft 20 is movably fitted inside the guide cylinder 12 and does not rotate relative to the guide cylinder 12. An extension post 21 is provided at the end of the connecting shaft 20 away from the locking head 50, extending beyond the guide cylinder 12. A second rod 63 is fixed to the extension post 21, and a spring 62 is sleeved on the extension post 21. The two ends of the spring 62 abut against the end wall of the guide cylinder 12 and the second rod 63, respectively. A through hole 121 is provided at the end of the guide cylinder 12 away from the first plate 11, through which the extension post 21 conformally passes. The cross-section of the extension post 21 is non-circular.

[0044] By designing the guide cylinder 12, the connection between the connecting shaft 20 and the first plate 11 is achieved. Simultaneously, the cooperation between the extension column 21 and the through hole 121 allows the connecting shaft 20 to move along its own axis on the first plate 11 while preventing the connecting shaft 20 from rotating relative to the first plate 11. That is, the first support frame 10 and the connecting shaft 20 as a whole can rotate relative to the second support frame 30, or the second support frame 30 can rotate relative to the first support frame 10 and the connecting shaft 20. This not only facilitates processing but also improves the overall structural stability.

[0045] In one embodiment, the drive assembly 60 further includes a pull rope 65, one end of which is connected to the first rod 61. A limiting seat 13 is fixedly mounted on the first support frame 10, the pull rope 65 passes through the limiting seat 13, and a limiting head 651 is provided on the pull rope 65, which can abut against the limiting seat 13. Using the pull rope 65, the user can quickly operate the first rod 61, thereby achieving the unlocking operation between the first support frame 10 and the second support frame 30, making the operation more convenient.

[0046] This embodiment also provides a study desk using the aforementioned lockable hinge mechanism. The study desk includes a desk frame and a desk panel, with the desk panel hinged to the desk frame. A first support frame 10 is hinged to the desk frame, and a second support frame 30 is hinged to the desk panel. By using the aforementioned lockable hinge mechanism, the overall structure is stable and durable, and the tilt angle of the desk panel can be infinitely adjusted, making operation convenient.

[0047] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A lockable hinge mechanism, characterized in that, include: The first support frame (10) has two parallel and connected first plates (11); Two cylindrical connecting shafts (20) are respectively provided on the two first plates (11). The connecting shafts (20) do not rotate relative to the first plates (11) and can move on the first plates (11) along their own axis. The second support frame (30) has two parallel and connected second plates (31), each second plate (31) corresponds to one first plate (11), the second plate (31) is movably connected to the corresponding connecting shaft (20), and can rotate around the axis of the connecting shaft (20); Two coaxial one-way bearings (40) with opposite locking directions are respectively disposed on two second plates (31). The one-way bearings (40) are located on the side of the second plate (31) away from the first plate (11). The axis of the one-way bearings (40) coincides with the axis of the connecting shaft (20). Two locking heads (50) are respectively disposed on the two connecting shafts (20). The locking heads (50) are coaxially arranged with the connecting shafts (20), and each locking head (50) is fitted into a corresponding one-way bearing (40); and The drive assembly (60) is used to synchronously drive the two connecting shafts (20) to move away from each other so that each locking head (50) disengages from the corresponding one-way bearing (40), or to synchronously drive the two connecting shafts (20) to move closer to each other so that each locking head (50) engages in the corresponding one-way bearing (40).

2. The lockable hinge mechanism according to claim 1, characterized in that, The drive assembly (60) includes a first rod (61), a reset unit, two second rods (63), and two connecting brackets (64); Each of the second rods (63) is provided on the corresponding connecting shaft (20), the second rod (63) is close to the end of the connecting shaft (20) away from the locking head (50), and the axis of the second rod (63) is perpendicular to the axis of the connecting shaft (20); The first rod (61) is arranged in parallel between the two second rods (63), and the axis of the first rod (61) is perpendicular to the axis of the connecting shaft (20) in space; one end of the two connecting frames (64) is hinged through the first rod (61), and the other end of the connecting frame (64) is hinged to the corresponding connecting shaft (20) through the second rod (63); The reset unit is used to apply a spring force to the two connecting shafts (20) to reset them after the two connecting shafts (20) move away from each other.

3. The lockable hinge mechanism according to claim 2, characterized in that, The reset unit includes two springs (62), each spring (62) being sleeved on the corresponding connecting shaft (20), with the two ends of the spring (62) abutting against the first plate (11) and the second rod (63) respectively.

4. The lockable hinge mechanism according to claim 3, characterized in that, The first plate (11) is provided with a guide cylinder (12) on the side opposite to the second plate (31), and the connecting shaft (20) is movably fitted in the guide cylinder (12) and does not rotate relative to the guide cylinder (12); The connecting shaft (20) has an extension post (21) at one end away from the locking head (50). The extension post (21) extends out of the guide cylinder (12). The second rod (63) is mounted on the extension post (21). The spring (62) is sleeved on the extension post (21). The two ends of the spring (62) abut against the end wall of the guide cylinder (12) and the second rod (63), respectively.

5. The lockable hinge mechanism according to claim 4, characterized in that, The guide cylinder (12) has a through hole (121) at one end away from the first plate (11), and the extension column (21) conformally passes through the through hole (121). The cross-section of the extension column (21) is non-circular.

6. The lockable hinge mechanism according to claim 2, characterized in that, The drive assembly (60) also includes a pull rope (65), one end of which is connected to the first rod (61).

7. The lockable hinge mechanism according to claim 6, characterized in that, The first support frame (10) is provided with a limiting seat (13), the pull rope (65) passes through the limiting seat (13), the pull rope (65) is provided with a limiting head (651), and the limiting head (651) can abut against the limiting seat (13).

8. A study desk, characterized in that, Includes the lockable hinge mechanism according to any one of claims 1-7.

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