Hinge mechanism and study desk

Abstract

The utility model provides a hinge mechanism and a study desk. The hinge mechanism comprises a first supporting frame, a connecting shaft, a second supporting frame, two one-way bearings, two locking heads and a driving assembly. The connecting shaft is of a cylindrical structure, the connecting shaft is arranged in the round holes of the two first plates in a penetrating mode without relative rotation, the connecting shaft can move on the first plates in the axis direction of the connecting shaft, and the connecting shaft is movably arranged on the second plate in a penetrating mode. The two one-way bearings are coaxial and opposite in locking direction, and the two one-way bearings are arranged on the two second plates correspondingly. Each locking head is arranged in the corresponding one-way bearing in a matched mode. The driving assembly is used for driving the connecting shaft to move so that the two locking heads can be separated from the corresponding one-way bearings correspondingly. When the second supporting frame rotates relative to the first supporting frame, the second supporting frame makes contact with and is matched with the optical axis section of the connecting shaft all the time, so that abrasion between the second supporting frame and the optical axis section is reduced, the service life of parts is prolonged, and the stability in the using process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to learning desk accessory technical field, concretely relates to a hinge mechanism and learning desk. BACKGROUND

[0002] The patent with the publication number CN222122023U provides a locking structure, including a first mounting seat, two rotating assemblies, a second mounting seat and an adjusting assembly, the locking structure has stepless locking function, can adjust and lock the included angle between the first mounting seat and the second mounting seat at any position, convenient operation. Among them, the rotating assembly includes a one-way bearing and a connecting column, the connecting column includes a first connecting section, a second connecting section and a third connecting section connected in turn, the first connecting section is matched with the one-way bearing, the second connecting section is matched with the first mounting seat, and the third connecting section is matched with the second mounting seat.

[0003] However, in the above-mentioned locking structure, a second through hole matched with the third connecting section is formed in the second plate of the second mounting seat, and the second through hole is a circular hole. The cross section of the third connecting section is non-circular (the non-circular shape can be triangular, quadrilateral, polygonal or other regular or irregular shape). Therefore, during the cooperation of the third connecting section with the second through hole, the wear of the third connecting section is accelerated, thereby affecting the use effect of the locking structure. UTILITY MODEL CONTENTS

[0004] In view of the defects in the prior art, the utility model aims to provide a hinge mechanism and a learning desk to reduce the wear of parts at the rotating position, prolong the service life of the parts and improve the stability during use.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a hinge mechanism, including a first support frame, having two parallel and connected first plates; a connecting shaft in the shape of a cylinder, being non-rotatably arranged on the two first plates, the connecting shaft being movable along its own axis on the first plates; a second support frame, having two parallel and connected second plates, the two second plates being arranged between the two first plates, the second plates being movably connected with the connecting shaft and being rotatable around the axis of the connecting shaft; two coaxial and locking direction opposite one-way bearings, being respectively arranged on the two second plates, the one-way bearings being located on the side of the second plates away from the first plates, the axis of the one-way bearings coinciding with the axis of the connecting shaft; two locking heads, being respectively arranged at the two ends of the connecting shaft, each locking head being fitted in the corresponding one-way bearing; and a driving assembly for moving the connecting shaft to make the two locking heads respectively disengage from the corresponding one-way bearings or make the two locking heads respectively engage into the corresponding one-way bearings.

[0006] Preferably, a limiting member is arranged on the first plate, a limiting portion is arranged on the connecting shaft, the limiting member cooperates with the limiting portion, so that the connecting shaft is arranged on the two first plates without relative rotation and can move along the axis of the connecting shaft.

[0007] Preferably, the limiting portion is a limiting hole extending along the axis of the connecting shaft, and the limiting member is a limiting rod arranged in the limiting hole.

[0008] Preferably, the limiting portion is a limiting groove extending along the axis of the connecting shaft, and the limiting member is a limiting cylinder, an inner wall of the limiting cylinder is provided with a limiting protrusion, and the limiting protrusion is slidingly arranged in the limiting groove.

[0009] Preferably, the two second plates are respectively referred to as second plate a and second plate b, the two one-way bearings are respectively referred to as one-way bearing a and one-way bearing b, the one-way bearing a is arranged on the second plate a, the second plate b is provided with a first support cylinder on a side away from the second plate a, the first support cylinder is coaxially arranged with the connecting shaft, and the one-way bearing b is arranged on a side of the first support cylinder away from the second plate b.

[0010] Preferably, a second support cylinder is further arranged on a side of the one-way bearing a away from the second plate a.

[0011] Preferably, the connecting shaft is provided with a first connecting column, the first support frame is provided with a second connecting column, the drive assembly includes a pull rope and an elastic return member, one end of the pull rope is connected to the first connecting column, and two ends of the elastic return member are respectively connected to the first connecting column and the second connecting column, and the elastic return member is used to apply an elastic force to the connecting shaft to prevent the locking head from being separated from the corresponding one-way bearing.

[0012] Preferably, a through hole is arranged on the first connecting column, the pull rope is arranged in the through hole, the first connecting column is provided with a gasket and a first nut, the gasket is located between the connecting shaft and the pull rope, and the first nut is threadedly arranged on the first connecting column and presses the pull rope on the gasket.

[0013] Preferably, the connecting shaft includes a first shaft body and a second shaft body without relative rotation, one end of the first shaft body is provided with a mounting hole, one end of the second shaft body is provided with a connecting head matched with the mounting hole, a first connecting hole is arranged through the first shaft body, the first connecting hole is communicated with the mounting hole, the connecting head is arranged through a second connecting hole, and the first connecting column is arranged in the first connecting hole and the second connecting hole.

[0014] The utility model also provides a learning desk, including the articulated mechanism of above.

[0015] The utility model discloses the beneficial effect:

[0016] The utility model discloses a hinged mechanism, it is designed the connecting shaft that can move along the self axial direction on the first support frame, since the connecting shaft is cylindrical and with the first support frame no relative rotation, therefore, the second support frame is always in contact, cooperation with the optical axis section of connecting axle in the process of rotating relative to the first support frame, this reduces the wear and tear between each other, prolongs the service life of spare part, improves the stability in the use process. Meanwhile, since the one-way bearing of two locking directions opposite is installed on the second support frame, two locking heads can be driven under the connecting axle, realize the cooperation or separation with corresponding one-way bearing, thereby also realize the locking or unlocking between the first support frame and the second support frame, and then the included angle of the first support frame and the second support frame is adjusted.

[0017] The utility model discloses a learning desk, through using the articulated mechanism of above, the whole stable structure is good, can realize stepless regulation to the deskboard inclination angle, convenient operation. DRAWINGS

[0018] In order to more clearly illustrate the embodiment of the utility model or the technical scheme in prior art, the following will introduce the drawing used in the embodiment or prior art description briefly. In all drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0019] Figure 1 The structure schematic diagram of articulated mechanism provided for the embodiment of the utility model is shown in the figure.

[0020] Figure 2 The structure schematic diagram of the first support frame is shown in the figure.

[0021] Figure 3 The structure schematic diagram of the second support frame is shown in the figure.

[0022] Figure 4 The structure schematic diagram of the connecting axle is shown in the figure.

[0023] Figure 5 The structure schematic diagram of the first connecting column and the pull rope cooperation is shown in the figure.

[0024] Figure 6 The structure schematic diagram of the connecting axle and the first support frame cooperation is shown in the figure.

[0025] Figure 7 The structure schematic diagram of the first axle body and the second axle body is shown in the figure.

[0026] Figure 8 A cross-sectional view of the two locking heads and the corresponding one-way bearing;

[0027] Figure 9 A structural view of the limiting member being a limiting cylinder;

[0028] Reference signs:

[0029] 10, first support frame; 11, first plate; 12, second connecting column; 20, connecting shaft; 21, limiting hole; 22, limiting groove; 23, first shaft body; 231, mounting hole; 232, first connecting hole; 24, second shaft body; 241, connecting head; 242, second connecting hole; 30, second support frame; 31, second plate; 40, one-way bearing; 50, locking head; 60, driving assembly; 61, pull rope; 62, elastic reset member; 71, limiting rod; 72, limiting cylinder; 81, first support cylinder; 82, second support cylinder; 91, first connecting column; 92, gasket; 93, first nut; 94, second nut. DETAILED DESCRIPTION

[0030] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the technical personnel in the field to which the present application belongs.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second", and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0034] 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.

[0035] 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.

[0036] like Figures 1-9 As shown, in one embodiment of this utility model, a hinge mechanism is provided, including a first support frame 10, a connecting shaft 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. The connecting shaft 20 has a cylindrical structure and passes through the circular holes of the two first plates 11 without relative rotation. The connecting shaft 20 can move along its own axis on the first plates 11. The second support frame 30 has two parallel and connected second plates 31, which are disposed between the two first plates 11. The connecting shaft 20 movably passes through the circular holes of the second plates 31.

[0037] Two one-way bearings 40 are coaxial and lock in opposite directions. The two one-way bearings 40 are respectively mounted on two second plates 31, with the bearings 40 located on the side of the second plate 31 opposite to the first plate 11. The axis of the one-way bearing 40 coincides with the axis of the connecting shaft 20. One-way needle roller bearings are used for the one-way bearings 40; this is existing technology and will not be described further in this embodiment. Two locking heads 50 are respectively located at both ends of the connecting shaft 20, with each locking head 50 fitting into a corresponding one-way bearing 40. The drive assembly 60 is used to move the connecting shaft 20, causing the two locking heads 50 to disengage from their respective one-way bearings 40, or to engage with their respective one-way bearings 40.

[0038] When the two locking heads 50 are respectively matched with the corresponding one-way bearings 40 (the locking heads 50 abut against the rolling needles in the one-way bearings 40), and the locking directions of the two one-way bearings 40 are opposite, the two one-way bearings 40 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.

[0039] When the user operates the driving assembly 60 to drive the connecting shaft 20 to move along the axial direction of the connecting shaft 20, the connecting shaft 20 synchronously drives the two locking heads 50 to gradually separate from the corresponding one-way bearings 40, and when the two locking heads 50 are separated from the corresponding one-way bearings 40, the first support frame 10 and the second support frame 30 can be rotated, so as to adjust the included angle of the first support frame 10 and the second support frame 30.

[0040] The hinge mechanism disclosed in the embodiment is characterized in that the connecting shaft 20 which can move along the axial direction of the connecting shaft 20 is designed on the first support frame 10, since the connecting shaft 20 is cylindrical and does not rotate relative to the first support frame 10, during the rotation of the second support frame 30 relative to the first support frame 10, the second support frame 30 is always in contact with and matched with the optical axis segment of the connecting shaft 20, which reduces the wear between the two, prolongs the service life of the parts, and improves the stability during use. Meanwhile, since the two one-way bearings 40 with opposite locking directions are installed on the second support frame 30, the two locking heads 50 can be driven by the connecting shaft 20 to be matched with or separated from the corresponding one-way bearings 40, so as to realize the locking or unlocking between the first support frame 10 and the second support frame 30, and then facilitate the adjustment of the included angle of the first support frame 10 and the second support frame 30.

[0041] In one embodiment, the first plate 11 is provided with a limiting piece, the connecting shaft 20 is provided with a limiting part, and the limiting piece is matched with the limiting part, so that the connecting shaft 20 is arranged on the two first plates 11 without relative rotation and can move along the axial direction of the connecting shaft 20 on the first plate 11.

[0042] In one embodiment, the limiting part is a limiting hole 21 which extends along the axial direction of the connecting shaft 20, and the limiting piece is a limiting rod 71 which has a U-shaped structure, both ends of the limiting rod 71 are fixed on one of the first plates 11, and the limiting rod 71 is arranged in the limiting hole 21.

[0043] By cooperating the limiting rod 71 with the limiting hole 21, the connecting shaft 20 can move along the axial direction of the connecting shaft 20 on the first support frame 10, and meanwhile, the self-rotation of the connecting shaft 20 relative to the first support frame 10 is avoided. Since the connecting shaft 20 does not rotate relative to the first support frame 10, and the two one-way bearings 40 are installed on the second support frame 30, as long as the two locking heads 50 cooperate with the corresponding one-way bearings 40, the two one-way bearings 40 with opposite locking directions interfere with each other, 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.

[0044] Referring to Figure 9 In an embodiment, the limiting part is a limiting groove 22 extending along the axial direction of the connecting shaft 20, and the limiting member is a limiting cylinder 72 fixed on the inner side wall of the first plate 11. The inner wall of the limiting cylinder 72 is provided with a limiting protrusion which is slidingly fitted in the limiting groove 22. In the same way, under the cooperation of the limiting protrusion and the limiting groove 22, the connecting shaft 20 can only move along the axial direction of the connecting shaft 20, and cannot rotate relative to the first support frame 10.

[0045] In an embodiment, the two second plates 31 are respectively referred to as second plate a and second plate b, and the two one-way bearings 40 are respectively referred to as one-way bearing a and one-way bearing b. The one-way bearing a is arranged on the second plate a. The second plate b is provided with a first support cylinder 81 on the side away from the second plate a. The first support cylinder 81 is coaxially arranged with the connecting shaft 20, and the one-way bearing b is arranged on the side of the first support cylinder 81 away from the second plate b. The hinge mechanism further comprises a second support cylinder 82 arranged on the side of the one-way bearing a away from the second plate a. The inner diameter of the first support cylinder 81 and the second support cylinder 82 is equal to or slightly larger than the outer diameter of the locking head 50. The first support cylinder 81 is designed to not only realize the installation and fixation of the one-way bearing a, but also realize the protection of the locking head 50.

[0046] In an embodiment, the connecting shaft 20 is provided with a first connecting column 91, and the first support frame 10 is provided with a second connecting column 12. The driving assembly 60 comprises a pull rope 61 and an elastic return member 62. One end of the pull rope 61 is connected with the first connecting column 91, and the elastic return member 62 adopts a tension spring. The two ends of the elastic return member 62 are respectively connected with the first connecting column 91 and the second connecting column 12. The elastic return member 62 is used to apply an elastic force to the connecting shaft 20 to prevent the locking head 50 from being separated from the corresponding one-way bearing 40.

[0047] Referring to Figure 8When the unlocking operation of the first support frame 10 and the second support frame 30 needs to be realized, the user pulls the pull rope 61, the pull rope 61 drives the first connecting column 91 and the connecting shaft 20 to move left, so that the two locking heads 50 are gradually separated from the two one-way bearings 40. In this process, the cooperation of the first connecting column 91 and the second connecting column 12 makes the elastic reset piece 62 further deform. After adjusting the included angle of the first support frame 10 and the second support frame 30, the user releases the pull rope 61, and under the elastic force of the elastic reset piece 62, the connecting shaft 20 is driven to move right, so that the two locking heads 50 are re-inserted into the corresponding one-way bearings 40, so that the locking of the first support frame 10 and the second support frame 30 is realized.

[0048] In an embodiment, in order to realize the connection of the pull rope 61 and the first connecting column 91, a through hole is formed in the first connecting column 91, and the pull rope 61 is arranged in the through hole. The first connecting column 91 is provided with a gasket 92 and a first nut 93, the gasket 92 is located between the connecting shaft 20 and the pull rope 61 and abuts against the connecting shaft 20. The first nut 93 is threadedly connected to the first connecting column 91 and presses the pull rope 61 against the gasket 92.

[0049] In an embodiment, the connecting shaft 20 includes a first shaft body 23 and a second shaft body 24 which do not rotate relative to each other, one end of the first shaft body 23 is provided with a mounting hole 231, one end of the second shaft body 24 is provided with a connecting head 241 matched with the mounting hole 231. The first shaft body 23 is provided with a first connecting hole 232 penetrating through the first shaft body 23, the first connecting hole 232 is communicated with the mounting hole 231, the connecting head 241 is provided with a second connecting hole 242 penetrating through the connecting head 241, the first connecting column 91 is arranged in the first connecting hole 232 and the second connecting hole 242, and the first shaft body 23 and the second shaft body 24 are fastened and connected through the cooperation of the second nut 94, the gasket 92 and the first nut 93. By designing the connecting shaft 20 as a split structure, the production and processing of the connecting shaft 20 are facilitated, and the installation and dismounting of the connecting shaft 20 are facilitated.

[0050] The embodiment also provides a learning desk (not shown in the drawings) using the above-mentioned hinge mechanism, the learning desk includes a desk frame and a desk board, the desk board is hinged to the desk frame, the first support frame 10 is hinged to the desk frame, and the second support frame 30 is hinged to the desk board. By using the above-mentioned hinge mechanism, the overall structure is stable, durable, can realize stepless adjustment of the inclination angle of the desk board, and is convenient to operate.

[0051] In the specification of the utility model, a large number of specific details are explained. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the specification.

[0052] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. An articulation mechanism, characterized by, The utility model relates to a support device for a rotating shaft, comprising: a first support frame (10) having two parallel and connected first plates (11); a cylindrical connecting shaft (20) rotatably penetrating the two first plates (11) and movable along its axis on the first plates (11); a second support frame (30) having two parallel and connected second plates (31) arranged between the two first plates (11), the second plates (31) being movably connected to the connecting shaft (20) and rotatable around the axis of the connecting shaft (20); two coaxial and locking direction opposite one-way bearings (40) arranged on the two second plates (31) respectively, the one-way bearings (40) being arranged on the side of the second plates (31) facing away from the first plates (11), the axes of the one-way bearings (40) coinciding with the axis of the connecting shaft (20); two locking heads (50) arranged on the two ends of the connecting shaft (20) respectively, each locking head (50) being fitted in a corresponding one-way bearing (40); and a driving assembly (60) for moving the connecting shaft (20) to make the two locking heads (50) respectively disengage from the corresponding one-way bearings (40) or make the two locking heads (50) respectively engage in the corresponding one-way bearings (40).

2. The articulating mechanism of claim 1, wherein, The first plates (11) are provided with limiters, the connecting shaft (20) is provided with limiters, and the limiters are matched with the limiters to rotatably penetrate the two first plates (11) and move along its axis on the first plates (11).

3. The articulating mechanism of claim 2, wherein, The limiters are limit holes (21) extending along the axis of the connecting shaft (20), and the limiters are limit rods (71) penetrating the limit holes (21).

4. The articulating mechanism of claim 2, wherein, The limiters are limit grooves (22) extending along the axis of the connecting shaft (20), and the limiters are limit cylinders (72) with limit protrusions on the inner wall thereof, the limit protrusions being slidingly fitted in the limit grooves (22).

5. The articulating mechanism of claim 1, wherein, The two second plates (31) are respectively referred to as second plate a and second plate b, the two one-way bearings (40) are respectively referred to as one-way bearing a and one-way bearing b, and the one-way bearing a is arranged on the second plate a; The side of the second plate b facing away from the second plate a is provided with a first support cylinder (81), the first support cylinder (81) is coaxially arranged with the connecting shaft (20), and the one-way bearing b is arranged on the side of the first support cylinder (81) facing away from the second plate b.

6. The articulating mechanism of claim 5, wherein, The utility model further comprises a second support cylinder (82) arranged on the side of the one-way bearing a facing away from the second plate a.

7. The articulating mechanism of claim 1, wherein, The connecting shaft (20) is provided with a first connecting column (91), and the first support frame (10) is provided with a second connecting column (12). The driving assembly (60) comprises a pull rope (61) and an elastic reset member (62), one end of the pull rope (61) is connected with the first connecting column (91), two ends of the elastic reset member (62) are connected with the first connecting column (91) and the second connecting column (12) respectively, and the elastic reset member (62) is used for applying elastic force to the connecting shaft (20) to prevent the locking head (50) from being separated from the corresponding one-way bearing (40).

8. The articulating mechanism of claim 7, wherein, A through hole is formed in the first connecting column (91), and the pull rope (61) is arranged in the through hole; the first connecting column (91) is provided with a gasket (92) and a first nut (93), the gasket (92) is located between the connecting shaft (20) and the pull rope (61), and the first nut (93) is threadedly connected on the first connecting column (91) and presses the pull rope (61) on the gasket (92).

9. The articulating mechanism of claim 7, wherein, The connecting shaft (20) comprises first and second shaft bodies (23 and 24) without relative rotation, one end of the first shaft body (23) is provided with a mounting hole (231), and one end of the second shaft body (24) is provided with a connecting head (241) matched with the mounting hole (231); A first connecting hole (232) is formed in the first shaft body (23) and communicates with the mounting hole (231), the connecting head (241) is provided with a second connecting hole (242), and the first connecting column (91) is arranged in the first connecting hole (232) and the second connecting hole (242).

10. A learning desk, characterized by, An articulated mechanism according to any one of claims 1-9. An articulated mechanism according to any one of claims 1-9.

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