WO2022257342A1 - 一种铰链及可穿戴设备 - Google Patents

一种铰链及可穿戴设备 Download PDF

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Publication number
WO2022257342A1
WO2022257342A1 PCT/CN2021/128019 CN2021128019W WO2022257342A1 WO 2022257342 A1 WO2022257342 A1 WO 2022257342A1 CN 2021128019 W CN2021128019 W CN 2021128019W WO 2022257342 A1 WO2022257342 A1 WO 2022257342A1
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WIPO (PCT)
Prior art keywords
ratchet
movable
fixed
hinge
shaft
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PCT/CN2021/128019
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English (en)
French (fr)
Inventor
张超
江宇航
姜滨
迟小羽
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歌尔股份有限公司
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Publication of WO2022257342A1 publication Critical patent/WO2022257342A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0176—Head mounted characterised by mechanical features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/20—Optical, e.g. movable lenses or mirrors; Spectacles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B2027/0178—Eyeglass type

Definitions

  • the invention relates to the technical field of wearable devices, in particular to a hinge.
  • the invention also relates to a wearable device.
  • AR Augmented Reality
  • Augmented Reality Augmented Reality
  • 3D modeling 3D modeling
  • real-time tracking and registration 3D modeling
  • intelligent interaction 3D models
  • sensing 3D modeling
  • the generated text, images, 3D models and other virtual information are simulated and applied to the real world to achieve "enhancement" of the real world.
  • VR Virtual Reality, virtual reality
  • VR Virtual Reality, virtual reality
  • AR and VR products are gradually lightweight, and AR and VR products in the form of glasses are becoming more and more mainstream in the market.
  • AR and VR products in the form of glasses usually include two main parts, namely the frame and temples.
  • the frame is a fixed part, while the temples are movable parts that can be turned over on the frame to realize opening, closing and folding movements.
  • connecting cables such as FPC and flat cables, are generally connected between the frame and the temples to realize signal interaction or enhance heat dissipation.
  • the connecting cables are generally designed to have a certain amount of excess length to prevent them from being pulled and broken when they are in a tight state for a long time, with the frequent reciprocating opening and closing movements of the temples, the connecting cables will always follow the temples. Rotation and reciprocating bending rotation, so that there is always a fixed bending point position (or bending area) on the connecting cable. During long-term use, the bending point is prone to bending fatigue and even breakage. Causes problems such as signal transmission distortion, increased signal loss, and signal interruption.
  • the purpose of the present invention is to provide a hinge, which can avoid bending fatigue of connecting cables during long-term reciprocating bending motion, and ensure signal transmission quality.
  • Another object of the present invention is to provide a wearable device.
  • the present invention provides a hinge, which includes a fixed ratchet connected with the fixed part, a movable ratchet connected with the movable part and rotating synchronously with it, and a second movable ratchet sleeved on the fixed shaft of the fixed ratchet and engaged with it.
  • the second middle ratchet also includes several sliding rods axially connected between the first middle ratchet and the second middle ratchet, and a rotating wheel passing through each of the sliding rods and connected to the connecting cable, Both the first middle ratchet and the second middle ratchet are slidably sleeved on each of the sliding rods.
  • the end surface of the fixed shaft is provided with a mounting groove, and the end of the movable shaft is rotatably inserted in the mounting groove; the end of the fixed shaft and the end of the movable shaft are sleeved with collars, and the two collars respectively press against the two ends of the runner.
  • the collar is pressed against the inner ring area of the end face of the runner, and each of the sliding rods passes through the outer ring area of the end face of the runner.
  • the first spring is sleeved on the fixed shaft, and the two ends of the first spring are respectively connected to the inner walls of the fixed ratchet and the first intermediate ratchet;
  • the second spring sleeve It is arranged on the movable shaft, and the two ends of the second spring are respectively connected to the inner walls of the movable ratchet and the second middle ratchet.
  • it also includes a speed reduction transmission mechanism whose head end is power-connected to the runner and whose end is connected to the connection cable for reducing the displacement of the connection cable.
  • the running wheel is a driving gear
  • the reduction transmission mechanism is a passive reduction gear set meshing with the driving gear
  • the connecting cable is connected to the output shaft of the passive reduction gear set.
  • the running wheel is a worm
  • the reduction transmission mechanism is a worm gear meshed with the worm
  • the connecting cable is connected to the output shaft of the worm gear.
  • connection cable Preferably, it also includes a reset mechanism connected with the connection cable and used to reset it after a certain amount of displacement occurs.
  • the present invention also provides a wearable device, including a fixed part, a movable part reversibly connected to the fixed part, a connecting cable and a hinge connected between the fixed part and the movable part, wherein the The hinge is specifically the hinge described in any one of the above.
  • the hinge provided by the present invention mainly includes a fixed ratchet, a movable ratchet, a fixed shaft, a movable shaft, a first middle ratchet, a second middle ratchet, a first spring, and a second spring.
  • the fixed ratchet is connected with a fixed member (such as a mirror frame) through a fixed shaft, and remains fixed and cannot be rotated.
  • the movable ratchet is connected to the movable part (such as the mirror leg) through the movable shaft, and can be driven by it to perform synchronous rotation when the mirror leg is flipped and opened.
  • the direction of rotation (or tilt direction) is opposite.
  • the first intermediate ratchet is sleeved on the fixed shaft and engaged with the fixed ratchet.
  • the second middle ratchet is sleeved on the movable shaft and engaged with the movable ratchet.
  • the first spring tensions the fixed ratchet and the first intermediate ratchet with elastic force, so that the two are kept engaged in a natural state.
  • the second spring tensions the movable ratchet and the second intermediate ratchet with elastic force, so that the two are kept in an engaged state in a natural state.
  • the rotation states of the first middle ratchet and the second middle ratchet are kept synchronous, and both or one of them are connected with the connecting cable.
  • the movable ratchet rotates in the same direction, and because it keeps meshing with the second middle ratchet, it drives the second middle ratchet.
  • the two middle ratchets rotate in the same direction, and then drive the first middle ratchet to rotate in the same direction.
  • the first middle ratchet does not mesh with the fixed ratchet during this process, but only idles, and overcomes the elastic force of the first spring under the drive of the force between the teeth.
  • the second middle ratchet rotates in the same direction, it performs reciprocating linear motion along the axial direction.
  • the movable part When the movable part is flipped and folded counterclockwise (or clockwise), the movable ratchet rotates in the same direction, but the second intermediate ratchet cannot rotate synchronously with the movable ratchet due to the engagement of the first intermediate ratchet with the fixed ratchet
  • the second middle ratchet is meshed, only idling, and is driven by the force between the teeth to overcome the elastic force of the second spring to perform reciprocating linear motion in the axial direction.
  • the first intermediate ratchet remains engaged with the fixed ratchet and remains stationary.
  • the first middle ratchet and the second middle ratchet are driven to generate a certain amount of rotation, thereby driving the connecting cable to generate a certain amount of displacement, and then the connecting wire
  • the current bending point of the cable changes, so that when the opening and closing movable parts are flipped back and forth for many times, the bending point of the connecting cable is always in a dynamic change, so it can avoid the long-term reciprocating bending movement of the connecting cable. Bending fatigue occurs to ensure the quality of signal transmission.
  • Fig. 1 is a schematic diagram of the overall structure of a specific embodiment provided by the present invention.
  • FIG. 2 is a partial structural schematic diagram of FIG. 1 .
  • Fig. 3 is a schematic diagram of the connection structure between the first middle ratchet and the second middle ratchet.
  • Fig. 4 is a schematic diagram of the overall structure of another specific embodiment provided by the present invention.
  • Fig. 5 is a structural schematic diagram of the mirror legs flipped to the unfolded state.
  • Fig. 6 is a structural schematic diagram of the mirror legs flipped to a folded state.
  • FIG. 1 is a schematic diagram of the overall structure of a specific embodiment provided by the present invention.
  • the hinge mainly includes a fixed ratchet 1, a movable ratchet 2, a fixed shaft 3, a movable shaft 4, a first middle ratchet 5, a second middle ratchet 6, a first spring 7, a second middle ratchet Two springs8.
  • the fixed ratchet 1 is connected with the fixed part a (such as a mirror frame) through the fixed shaft 3, and remains fixed and cannot be rotated.
  • the movable ratchet 2 is connected with the movable part b (such as the mirror leg) through the movable shaft 4, and can be driven by it to perform synchronous rotation when the mirror leg is flipped and opened and closed.
  • the ratchets of 1 rotate in the opposite direction (or tilt toward).
  • the first intermediate ratchet 5 is sleeved on the fixed shaft 3 and meshed with the fixed ratchet 1 .
  • the second middle ratchet 6 is sleeved on the movable shaft 4 and meshed with the movable ratchet 2 . Since the fixed ratchet 1, the movable ratchet 2, the first intermediate ratchet 5, and the second intermediate ratchet 6 are all ratchet structures, when the movable ratchet 2 and the second intermediate ratchet 6 are engaged, only one-way transmission can be performed, and reverse rotation cannot Normal transmission, only idling is possible.
  • fixed ratchet 1 is owing to itself is fixed, so fixed ratchet 1 can't carry out unidirectional transmission after meshing with first middle ratchet 5, can only make first middle ratchet 5 carry out reverse idling on fixed ratchet 1.
  • the first spring 7 tensions the fixed ratchet 1 and the first intermediate ratchet 5 mutually by elastic force, so that the two keep the meshing state in a natural state.
  • the second spring 8 tensions the movable ratchet 2 and the second intermediate ratchet 6 mutually by elastic force, so that the two keep the meshing state in a natural state.
  • the rotation state of the first middle ratchet 5 and the second middle ratchet 6 is kept synchronous, and the first middle ratchet 5 is connected with the connecting cable c or the second middle ratchet 6 is connected with the connecting cable c, or the first middle ratchet 5 is connected with the second middle ratchet
  • the two middle ratchets 6 are connected with the connecting cable c at the same time, so as to drive the position of the bending point of the connecting cable c to be displaced when rotating.
  • the first intermediate ratchet 5 does not mesh with the fixed ratchet 1 during this process, but only idles, and overcomes the first spring driven by the force between the teeth 7, and the second middle ratchet 6 rotates in the same direction and reciprocates linearly along the axial direction.
  • the movable part b When the movable part b is reversed and folded counterclockwise (or clockwise), the movable ratchet 2 rotates in the same direction, but the second intermediate ratchet 6 cannot rotate synchronously with the movable ratchet 2 because the first intermediate ratchet 5 meshes with the fixed ratchet 1, that is At this time, the movable ratchet 2 does not mesh with the second middle ratchet 6, but only idles, and is driven by the force between the teeth to overcome the elastic force of the second spring 8 to perform reciprocating linear motion in the axial direction. At the same time, the first intermediate ratchet 5 remains engaged with the fixed ratchet 1 and remains stationary.
  • the first middle ratchet 5 and the second middle ratchet 6 are driven to generate a certain amount of rotation, thereby driving the connecting cable c to generate a certain amount of displacement , so that the current bending point of the connecting cable c changes, so that when the opening and closing movable part b is flipped back and forth for many times, the bending point of the connecting cable c is always in a dynamic change, so that the connection cable c can be avoided c
  • bending fatigue occurs to ensure the quality of signal transmission.
  • a sliding rod 9 and a rotating wheel 10 are added in this embodiment.
  • the sliding rod 9 is axially connected between the first middle ratchet 5 and the second middle ratchet 6, and generally a plurality of them are connected at the same time along the circumferential direction, and the first middle ratchet 5 and the second middle ratchet 6 can slide Sleeved on each sliding rod 9, so that the two can axially slide on each sliding rod 9 against the elastic force of their respective springs.
  • the runners 10 are mounted on each sliding rod 9 and rotate synchronously with the first middle ratchet 5 and the second middle ratchet 6, and are mainly used to replace the two and connect with the connecting cable c.
  • each sliding rod 9 binds the rotational motion states of the first intermediate ratchet 5, the second intermediate ratchet 6 and the runner 10 to each other, that is, the rotational motion of the three is synchronized, but does not affect the first intermediate ratchet 5, the second intermediate ratchet 5, and the second intermediate ratchet 5.
  • the circumferential surface of the runner 10 can be pasted or pressed on the connecting cable c, so that the bending point of the connecting cable c can be directly pulled Displacement or the displacement of the bending point of the connecting cable c driven by friction transmission, specifically, it can be pasted or pressed on one end area of the connecting cable c, so as to maximize the use of the remaining length of the connecting cable c for the bending point Perform displacement.
  • the peripheral surface of the rotating wheel 10 may also be pasted or pressed on the center position or the current bending point position of the connecting cable c.
  • FIG. 2 is a partial structural schematic diagram of FIG. 1 .
  • the end of the fixed shaft 3 and the end of the movable shaft 4 form an axial butt joint.
  • an installation groove is provided on the end face of the fixed shaft 3, and at the same time, the end of the movable shaft 4 is inserted in the installation groove, and the degree of freedom of rotation is maintained in the installation groove.
  • a bearing can be press-fitted in the mounting groove, and then the end of the movable shaft 4 is sleeved in the bearing.
  • first intermediate ratchet 5 or the second intermediate ratchet 6 is respectively driven by the elastic force of the first spring 7 and the second spring 8 to axially displace on each sliding rod 9, it may touch between the two.
  • the running wheel 10 in between causes unnecessary axial displacement of the running wheel 10.
  • a collar 11 is sleeved on the end area of the fixed shaft 3 and the end area of the movable shaft 4.
  • the running wheel 10 The whole body is installed between the collars 11 on both sides, so that the collars 11 on both sides press the end faces of the two ends of the runner 10 respectively. With such arrangement, the collars 11 on both sides form an axial limit for the runner 10, thereby preventing the runner 10 from being displaced axially, and can only perform circumferential rotation.
  • FIG. 3 is a schematic diagram of the connection structure between the first middle ratchet 5 and the second middle ratchet 6 .
  • each sliding rod 9 is specifically installed in the outer ring area of the two end faces of the runner 10 along the circumferential direction, generally 3 to 6 can be installed at the same time.
  • the first spring 7 is specifically sleeved on the fixed shaft 3, and one end thereof is connected to the inner circular surface of the fixed ratchet 1, while the other end thereof One end is connected to the inner circular surface of the first intermediate ratchet 5 , so that the direction of the elastic force of the first spring 7 is kept in the axial direction through the guiding effect of the fixed shaft 3 .
  • the second spring 8 is specifically sleeved on the movable shaft 4, and one end thereof is connected to the inner circle of the movable ratchet 2, and the other end is connected to the inner circle of the second intermediate ratchet 6, so that the movable shaft
  • the guiding effect of 4 keeps the elastic force direction of the second spring 8 in the axial direction.
  • a deceleration transmission mechanism 12 is added in the present embodiment.
  • the head end of the reduction transmission mechanism 12 forms a power connection with the runner 10, and its end is connected with the connecting cable c, which is mainly used to provide the power transmission ratio between the runner 10 and the connecting cable c, so that the rotation of the runner 10 The amount is reduced and then transmitted to the connecting cable c.
  • the reduction transmission mechanism 12 is a passive reduction gear set, including several reduction gears meshing with each other.
  • gear teeth are arranged on the outer surface of the runner 10 to form a driving gear structure.
  • the passive reduction gear set as the power input end of the passive reduction gear set.
  • the output shaft of the passive reduction gear set is connected with the connection cable c.
  • the passive reduction gear set includes two-stage reduction gears, wherein the runner 10 has 40 teeth, the adjacent primary reduction gear has 70 teeth, and the transmission ratio is 1.75.
  • the pinion gear of the shaft has 20 teeth, and the secondary reduction gear has 70 teeth, and the transmission ratio is 3.5, so the total transmission ratio is 6.125.
  • FIG. 4 is a schematic diagram of the overall structure of another specific embodiment provided by the present invention.
  • the reduction transmission mechanism 12 is a worm gear.
  • the outer circumference of the runner 10 is provided with helical teeth, forming a worm structure, and forms a meshing transmission with the worm gear, and the connecting cable c is connected to the worm gear. on the output shaft.
  • the rotation amount of the runner 10 can be reduced by the worm gear reduction transmission mechanism 12 and then transmitted to the connecting cable c.
  • the transmission ratio of the worm gear reduction transmission mechanism 12 is greater than that of the above-mentioned gear reduction transmission mechanism 12 .
  • the reset mechanism is mainly used to reset the position of the bending point of the connecting cable c, so that the state of the connecting cable c returns to the initial state, and then continue to use the rotating wheel 10 to repeatedly perform the displacement of the bending point.
  • This embodiment also provides a wearable device, including a fixed part a, a movable part b reversibly connected to the fixed part a, a connecting cable c connected between the fixed part a and the movable part b and used for transmitting signals , and a hinge connected between the fixed part a and the movable part b, wherein the specific content of the hinge is the same as the above-mentioned relevant content, and will not be repeated here.
  • Wearable devices are generally devices such as smart glasses.
  • the fixed part a is specifically a frame
  • the movable part b is specifically a temple.
  • FIG. 5 is a structural schematic view of the mirror legs flipped to an unfolded state.
  • the movable ratchet 2 rotates synchronously under its drive, and its rotation direction is opposite to the direction of the ratchet teeth of the second middle ratchet 6, so it forms a meshing transmission with the second middle ratchet 6, and then through sliding
  • the rod 9 drives the first intermediate ratchet 5 to also rotate synchronously.
  • the rotation direction of the first intermediate ratchet 5 follows the direction of the ratchet teeth of the fixed ratchet 1, so it does not mesh with the fixed ratchet 1, but only idles, and overcomes the first ratchet under the drive of the contact force between the teeth.
  • the elastic force of the spring 7 keeps the second middle ratchet 6 to rotate synchronously, and at the same time, the sliding rod 9 performs reciprocating linear motion along its axial direction. Since the rotation states of the first intermediate ratchet 5 , the second intermediate ratchet 6 and the rotating wheel 10 are bound to each other, the rotating wheel 10 rotates synchronously and drives the position of the bending point of the connecting cable c to be displaced.
  • FIG. 6 is a structural schematic view of the mirror legs flipped to a folded state.
  • the movable ratchet 2 rotates synchronously and reversely under its drive, and its rotation direction follows the direction of the ratchet teeth of the second middle ratchet 6.
  • the first middle ratchet 5 in this rotation direction The direction of the ratchet teeth of the fixed ratchet 1 is opposite to that of the fixed ratchet 1, but the fixed ratchet 1 is fixed, so the first middle ratchet 5 together with the second middle ratchet 6 and the runner 10 cannot rotate, so that the movable ratchet 2 does not move at this time.
  • the position of the bending point of the connecting cable c will change during the unfolding of the temples, but remain unchanged during the folding of the temples .

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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Pivots And Pivotal Connections (AREA)
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Abstract

一种铰链及可穿戴设备，包括与固定件（a）相连的固定棘轮（1）、与活动件（b）相连并与其同步旋转的活动棘轮（2）、套设于固定棘轮（1）的固定轴（3）上并与其啮合的第一中间棘轮（5）、套设于活动棘轮（2）的活动轴（4）上并与其啮合的第二中间棘轮（6）、连接于固定棘轮（1）与第一中间棘轮（5）之间并将两者互相拉紧的第一弹簧（7）、连接于活动棘轮（2）与第二中间棘轮（6）之间并将两者互相拉紧的第二弹簧（8），第一中间棘轮（5）与第二中间棘轮（6）同步转动并与连接线缆（c）相连，且固定棘轮（1）与活动棘轮（2）的棘齿旋向相反。

Description

一种铰链及可穿戴设备
本申请要求于2021年06月11日提交中国专利局、申请号为202110656843.7、发明名称为“一种铰链及可穿戴设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及可穿戴设备技术领域，特别涉及一种铰链。本发明还涉及一种可穿戴设备。
背景技术
随着虚拟现实、增强现实技术的发展，越来越多的头戴显示设备已得到广泛使用，比如AR产品、VR产品等。
AR(Augmented Reality，增强现实)技术是一种将虚拟信息与真实世界巧妙融合的技术，广泛运用了多媒体、三维建模、实时跟踪及注册、智能交互、传感等多种技术手段，将计算机生成的文字、图像、三维模型等虚拟信息模拟仿真后，应用到真实世界中，实现对真实世界的“增强”。
VR(Virtual Reality，虚拟现实)技术是一种可以创建和体验虚拟世界的计算机仿真技术，其利用现实生活中的数据，通过计算机技术产生电子信号，将其与各种输出设备结合使其转化为能够让人们感受到的现象，使用户沉浸到虚拟环境中。
目前，AR、VR产品逐渐轻量化，眼镜形态的AR、VR产品越来越成为市场的主流。为便于佩戴，眼镜形态的AR、VR产品通常包括两部分主体，即镜框与镜腿，其中镜框是固定件，而镜腿是活动件，可在镜框上进行翻转，实现开合折叠运动。同时，在镜框与镜腿之间一般还连接有连接线缆，比如FPC、排线等，以实现信号交互或加强散热。
然而，虽然连接线缆一般都设计有一定量的余长，避免其长期处于紧绷状态而受拉扯导致断裂，但随着镜腿的频繁往复开合运动，连接线缆也总是 会跟随镜腿的转动而往复弯折转动，如此导致在连接线缆上始终存在一个固定不变的弯折点位置(或弯折区)，长期使用时，该弯折点容易产生弯折疲劳，甚至断裂，造成信号传输失真、信号损耗加剧、信号中断等问题。
因此，如何避免连接线缆在长期往复弯折运动情况下产生弯折疲劳，保证信号传输质量，是本领域技术人员面临的技术问题。
发明内容
本发明的目的是提供一种铰链，能够避免连接线缆在长期往复弯折运动情况下产生弯折疲劳，保证信号传输质量。本发明的另一目的是提供一种可穿戴设备。
为解决上述技术问题，本发明提供一种铰链，包括与固定件相连的固定棘轮、与活动件相连并与其同步旋转的活动棘轮、套设于所述固定棘轮的固定轴上并与其啮合的第一中间棘轮、套设于所述活动棘轮的活动轴上并与其啮合的第二中间棘轮、连接于所述固定棘轮与所述第一中间棘轮之间并将两者互相拉紧的第一弹簧、连接于所述活动棘轮与所述第二中间棘轮之间并将两者互相拉紧的第二弹簧，所述第一中间棘轮与所述第二中间棘轮同步转动并与连接线缆相连，且所述固定棘轮与所述活动棘轮的棘齿旋向相反。
优选地，还包括轴向连接于所述第一中间棘轮与所述第二中间棘轮之间的若干根滑动杆、穿设于各根所述滑动杆上并与连接线缆相连的转轮，所述第一中间棘轮及所述第二中间棘轮均可滑动地套设于各根所述滑动杆上。
优选地，所述固定轴的末端端面开设有安装槽，所述活动轴的末端可旋转地插设于所述安装槽内；所述固定轴的末端与所述活动轴的末端均套设有轴环，且两所述轴环分别压紧所述转轮的两端端面。
优选地，所述轴环压紧于所述转轮的端面内圈区域，各根所述滑动杆穿设于所述转轮的端面外圈区域。
优选地，所述第一弹簧套设于所述固定轴上，且所述第一弹簧的两端分别连接在所述固定棘轮与所述第一中间棘轮的内壁上；所述第二弹簧套设于所述活动轴上，且所述第二弹簧的两端分别连接在所述活动棘轮与所述第二中间棘轮的内壁上。
优选地，还包括首端与所述转轮动力连接且末端与所述连接线缆相连、 用于缩减所述连接线缆的位移量的减速传动机构。
优选地，所述转轮为主动齿轮，且所述减速传动机构为与所述主动齿轮啮合传动的被动减速齿轮组，所述连接线缆连接于所述被动减速齿轮组的输出轴。
优选地，所述转轮为蜗杆，且所述减速传动机构为与所述蜗杆啮合传动的涡轮，且所述连接线缆连接于所述涡轮的输出轴。
优选地，还包括与所述连接线缆相连、用于在其产生一定位移量后将其复位的复位机构。
本发明还提供一种可穿戴设备，包括固定件、可翻转地连接于所述固定件的活动件、连接于所述固定件与所述活动件之间的连接线缆及铰链，其中，所述铰链具体为上述任一项所述的铰链。
本发明所提供的铰链，主要包括固定棘轮、活动棘轮、固定轴、活动轴、第一中间棘轮、第二中间棘轮、第一弹簧、第二弹簧。其中，固定棘轮通过固定轴与固定件(如镜框)相连，保持固定，不能进行转动。活动棘轮通过活动轴与活动件(如镜腿)相连，可在镜腿进行翻转开合运动时在其带动下进行同步旋转运动，其棘齿旋向(或倾斜朝向)与固定棘轮的棘齿旋向(或倾斜朝向)相反。第一中间棘轮套设在固定轴上，并与固定棘轮啮合。第二中间棘轮套设在活动轴上，并与活动棘轮啮合。第一弹簧通过弹力将固定棘轮与第一中间棘轮互相拉紧，使两者在自然状态下保持啮合状态。第二弹簧通过弹力将活动棘轮与第二中间棘轮互相拉紧，使两者在自然状态下保持啮合状态。同时，第一中间棘轮与第二中间棘轮的转动状态保持同步，且两者或其中之一与连接线缆相连。
在活动件于固定件上的单次翻转开合运动过程中，当活动件顺时针(或逆时针)进行翻转打开后，活动棘轮同向旋转，由于与第二中间棘轮保持啮合，因此带动第二中间棘轮同向旋转，进而带动第一中间棘轮同向旋转。同时，由于固定棘轮与活动棘轮的棘齿旋向相反，第一中间棘轮在此过程中不与固定棘轮形成啮合，仅空转，并在齿间作用力的驱动下克服第一弹簧的弹力，与第二中间棘轮同向旋转的同时沿轴向进行往复直线运动。
当活动件逆时针(或顺指针)进行翻转折叠后，活动棘轮同向旋转，但由于第一中间棘轮与固定棘轮啮合导致第二中间棘轮无法与活动棘轮同步旋 转，即此时活动棘轮不与第二中间棘轮形成啮合，仅空转，并在齿间作用力下的驱动下克服第二弹簧的弹力沿轴向进行往复直线运动。同时，第一中间棘轮与固定棘轮保持啮合状态且保持静止。
如此，当活动件在固定件上进行单次完整的翻转开合操作后，第一中间棘轮及第二中间棘轮被带动产生一定转动量，从而带动连接线缆产生一定位移量，进而使得连接线缆当前的弯折点产生变化，以此在多次往复翻转开合活动件时，连接线缆的弯折点总是处于动态变化中，因此能够避免连接线缆在长期往复弯折运动情况下产生弯折疲劳，保证信号传输质量。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明所提供的一种具体实施方式的整体结构示意图。
图2为图1的局部结构示意图。
图3为第一中间棘轮与第二中间棘轮的连接结构示意图。
图4为本发明所提供的另一种具体实施方式的整体结构示意图。
图5为镜腿翻转至展开状态的结构示意图。
图6为镜腿翻转至折叠状态的结构示意图。
其中，图1—图6中：
固定件—a，活动件—b，连接线缆—c；
固定棘轮—1，活动棘轮—2，固定轴—3，活动轴—4，第一中间棘轮—5，第二中间棘轮—6，第一弹簧—7，第二弹簧—8，滑动杆—9，转轮—10，轴环—11，减速传动机构—12。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参考图1，图1为本发明所提供的一种具体实施方式的整体结构示意图。
在本发明所提供的一种具体实施方式中，铰链主要包括固定棘轮1、活动棘轮2、固定轴3、活动轴4、第一中间棘轮5、第二中间棘轮6、第一弹簧7、第二弹簧8。
其中，固定棘轮1通过固定轴3与固定件a(如镜框)相连，保持固定，不能进行转动。活动棘轮2通过活动轴4与活动件b(如镜腿)相连，可在镜腿进行翻转开合运动时在其带动下进行同步旋转运动，其棘齿旋向(或倾斜朝向)与固定棘轮1的棘齿旋向(或倾斜朝向)相反。
第一中间棘轮5套设在固定轴3上，并与固定棘轮1啮合。第二中间棘轮6套设在活动轴4上，并与活动棘轮2啮合。由于固定棘轮1、活动棘轮2、第一中间棘轮5、第二中间棘轮6均为棘轮结构，因此，当活动棘轮2与第二中间棘轮6啮合后仅能进行单向传动，反向旋转无法正常传动，仅能进行空转。而固定棘轮1由于本身固定，因此固定棘轮1与第一中间棘轮5啮合后无法进行单向传动，仅能使第一中间棘轮5在固定棘轮1上进行反向空转。
第一弹簧7通过弹力将固定棘轮1与第一中间棘轮5互相拉紧，使两者在自然状态下保持啮合状态。第二弹簧8通过弹力将活动棘轮2与第二中间棘轮6互相拉紧，使两者在自然状态下保持啮合状态。
第一中间棘轮5与第二中间棘轮6的转动状态保持同步，且第一中间棘轮5与连接线缆c相连或第二中间棘轮6与连接线缆c相连，或者第一中间棘轮5与第二中间棘轮6同时与连接线缆c相连，以便在转动时带动连接线缆c的弯折点位置进行位移。
在活动件b于固定件a上的单次翻转开合运动过程中，当活动件b顺时针(或逆时针)进行翻转打开后，活动棘轮2同向旋转，由于与第二中间棘轮6保持啮合，因此带动第二中间棘轮6同向旋转，进而带动第一中间棘轮5同向旋转。同时，由于固定棘轮1与活动棘轮2的棘齿旋向相反，第一中间棘轮5在此过程中不与固定棘轮1形成啮合，仅空转，并在齿间作用力的驱动下克服第一弹簧7的弹力，与第二中间棘轮6同向旋转的同时沿轴向进行往复直线运动。
当活动件b逆时针(或顺指针)进行翻转折叠后，活动棘轮2同向旋转，但由于第一中间棘轮5与固定棘轮1啮合导致第二中间棘轮6无法与活动棘轮2同步旋转，即此时活动棘轮2不与第二中间棘轮6形成啮合，仅空转，并在齿间作用力下的驱动下克服第二弹簧8的弹力沿轴向进行往复直线运动。同时，第一中间棘轮5与固定棘轮1保持啮合状态且保持静止。
如此，当活动件b在固定件a上进行单次完整的翻转开合操作后，第一中间棘轮5及第二中间棘轮6被带动产生一定转动量，从而带动连接线缆c产生一定位移量，进而使得连接线缆c当前的弯折点产生变化，以此在多次往复翻转开合活动件b时，连接线缆c的弯折点总是处于动态变化中，因此能够避免连接线缆c在长期往复弯折运动情况下产生弯折疲劳，保证信号传输质量。
为保证第一中间棘轮5和第二中间棘轮6的转动状态同步性，本实施例中增设了滑动杆9和转轮10。
其中，滑动杆9轴向连接在第一中间棘轮5与第二中间棘轮6之间，一般沿周向方向同时连接有多根，且第一中间棘轮5与第二中间棘轮6均可滑动地套设在各根滑动杆9上，使得两者可在各根滑动杆9上克服各自弹簧的弹力进行轴向滑动。转轮10穿设在各根滑动杆9上，与第一中间棘轮5、第二中间棘轮6同步转动，主要用于代替两者与连接线缆c相连。
如此，各根滑动杆9将第一中间棘轮5、第二中间棘轮6以及转轮10的旋转运动状态互相绑定，即三者的旋转运动同步，但不影响第一中间棘轮5、第二中间棘轮6各自在滑动杆9上的独立轴向运动
一般的，为便于转轮10旋转时带动连接线缆c进行位移，具体可将转轮10的圆周面粘贴或压紧在连接线缆c上，如此可直接拉动连接线缆c的弯折点进行位移或者通过摩擦传动带动连接线缆c的弯折点进行位移，具体可以粘贴或压紧在连接线缆c的其中一端区域等，从而最大化利用连接线缆c的余长供弯折点进行位移。当然，也可将转轮10的圆周面粘贴或压紧在连接线缆c的中心位置或当前弯折点位置等。
如图2所示，图2为图1的局部结构示意图。
为便于第一中间棘轮5与第二中间棘轮6的连接和旋转状态绑定，在本实施例中，固定轴3的末端与活动轴4的末端形成轴向对接。具体的，在固 定轴3的末端端面开设有安装槽，同时，活动轴4的末端插设在该安装槽内，并在安装槽内保持旋转自由度。比如，可在安装槽内压装轴承，然后将活动轴4的末端套设在轴承内。
考虑到第一中间棘轮5或第二中间棘轮6在分别受到第一弹簧7和第二弹簧8的弹力驱动而在各根滑动杆9上进行轴向位移时，可能会触碰到两者之间的转轮10而导致转轮10出现不需要的轴向位移，本实施例在固定轴3的末端区域与活动轴4的末端区域均套设安装有轴环11，同时，将转轮10整体安装在两侧轴环11之间，使得两侧轴环11分别压紧转轮10的两端端面。如此设置，两侧轴环11即对转轮10形成了轴向限位，从而防止转轮10产生轴向位移，仅可进行周向旋转运动。
如图3所示，图3为第一中间棘轮5与第二中间棘轮6的连接结构示意图。
进一步的，为避免轴环11的存在对滑动杆9在转轮10上的穿设位置产生干涉，在本实施例中，两轴环11具体压紧在转轮10的两端端面的内圈区域，而各根滑动杆9具体沿周向穿设在转轮10的两端端面的外圈区域，一般可同时穿设3～6根。
为便于第一弹簧7与第二弹簧8的安装，在本实施例中，第一弹簧7具体套设在固定轴3上，并且其一端连接在固定棘轮1的内圆面上，而其另一端连接在第一中间棘轮5的内圆面上，如此通过固定轴3的导向作用使得第一弹簧7的弹力方向保持为轴向。同理，第二弹簧8具体套设在活动轴4，并且其一端连接在活动棘轮2的内圆面上，而其另一端连接在第二中间棘轮6的内圆面上，如此通过活动轴4的导向作用使得第二弹簧8的弹力方向保持为轴向。
此外，考虑到活动件b在单次翻转开合过程中，可能会造成转轮10较大的旋转量和连接线缆c的弯折点的较大位移量，为尽量缩减连接线缆c的弯折点位移量，本实施例中增设了减速传动机构12。该减速传动机构12的首端与转轮10形成动力连接，其末端与连接线缆c相连，主要用于提供转轮10至连接线缆c之间的动力传动比，使得转轮10的旋转量经过缩小后再传递到连接线缆c上。
具体的，在一种优选实施例中，减速传动机构12为被动减速齿轮组，包 括若干个互相啮合的减速齿轮，此时，转轮10的外圆面上设置有轮齿，形成主动齿轮结构，并与被动减速齿轮组形成啮合，作为被动减速齿轮组的动力输入端。同时，被动减速齿轮组的输出轴再与连接线缆c相连。如此设置，转轮10的旋转量即可通过被动减速齿轮组的减速缩小后再传递至连接线缆c上。
一般的，被动减速齿轮组包括两级减速齿轮，其中，转轮10的齿数为40，与之相邻的一级减速齿轮齿数为70，传动比为1.75，一级减速齿轮上还啮合有同轴的小齿轮，齿数为20，而二级减速齿轮的齿数为70，传动比为3.5，因此总传动比为6.125。
如图4所示，图4为本发明所提供的另一种具体实施方式的整体结构示意图。
在另一种优选实施例中，减速传动机构12为涡轮，此时转轮10的外圆面上设置有螺旋齿，形成蜗杆结构，并与涡轮形成啮合传动，而连接线缆c连接在涡轮的输出轴上。如此设置，转轮10的旋转量即可通过涡轮蜗杆减速传动机构12的减速缩小后再传递至连接线缆c上。一般的，涡轮蜗杆减速传动机构12的传动比大于上述齿轮减速传动机构12。
另外，考虑到连接线缆c的长度设计余量是固定的，当连接线缆c的弯折点经过多次位移改变后，连接线缆c的长度设计余量用尽，此时连接线缆c的弯折点无法继续进行同向位移改变，针对此，本实施例增设了复位机构。具体的，该复位机构主要用于将连接线缆c的弯折点位置复位，使得连接线缆c的状态恢复到初始状态，然后继续利用转轮10重复进行弯折点位移。
本实施例还提供一种可穿戴设备，包括固定件a、可翻转地连接在固定件a上的活动件b、连接在固定件a与活动件b之间并用于传递信号的连接线缆c，以及连接在固定件a与活动件b之间的铰链，其中，该铰链的具体内容与上述相关内容相同，此处不再赘述。可穿戴设备一般为智能眼镜等设备，对于智能眼镜而言，固定件a具体为镜框，而活动件b具体为镜腿。
如图5所示，图5为镜腿翻转至展开状态的结构示意图。
在镜腿翻转至展开状态的过程中，活动棘轮2在其带动下同步旋转，其旋转方向逆于第二中间棘轮6的棘齿朝向，因此与第二中间棘轮6形成啮合传动，进而通过滑动杆9带动第一中间棘轮5也同步旋转。此时，第一中间 棘轮5的旋转方向顺于固定棘轮1的棘齿朝向，因此不与固定棘轮1形成啮合，而是仅空转，并在齿间的抵接作用力的驱动下克服第一弹簧7的弹力，与第二中间棘轮6保持同步旋转的同时在滑动杆9上沿其轴向进行往复直线运动。由于第一中间棘轮5、第二中间棘轮6与转轮10的旋转状态互相绑定，因此转轮10同步旋转，并带动连接线缆c的弯折点位置进行位移。
如图6所示，图6为镜腿翻转至折叠状态的结构示意图。
在镜腿翻转至折叠状态的过程中，活动棘轮2在其带动下同步反向旋转，其旋转方向顺于第二中间棘轮6的棘齿朝向，同时此种旋转方向下的第一中间棘轮5逆于固定棘轮1的棘齿朝向，但固定棘轮1是固定不动的，因此第一中间棘轮5连带着第二中间棘轮6、转轮10均无法产生转动，进而使得活动棘轮2此时不与第二中间棘轮6形成啮合传动，仅产生空转，并在齿间的抵接作用力的驱动下克服第二弹簧8的弹力，在滑动杆9上沿其轴向进行往复直线运动。同理，由于第一中间棘轮5、第二中间棘轮6与转轮10的旋转状态互相绑定，因此转轮10在此种情况下保持不转动状态，连接线缆c的弯折点位置保持不变。
综上所述，在镜腿的一个完整的展开-折叠过程中，连接线缆c的弯折点位置将在镜腿的展开过程中产生一定变化，而在镜腿的折叠过程中保持不变。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种铰链，其特征在于，包括与固定件相连的固定棘轮(1)、与活动件相连并与其同步旋转的活动棘轮(2)、套设于所述固定棘轮(1)的固定轴(3)上并与其啮合的第一中间棘轮(5)、套设于所述活动棘轮(2)的活动轴(4)上并与其啮合的第二中间棘轮(6)、连接于所述固定棘轮(1)与所述第一中间棘轮(5)之间并将两者互相拉紧的第一弹簧(7)、连接于所述活动棘轮(2)与所述第二中间棘轮(6)之间并将两者互相拉紧的第二弹簧(8)，所述第一中间棘轮(5)与所述第二中间棘轮(6)同步转动并与连接线缆相连，且所述固定棘轮(1)与所述活动棘轮(2)的棘齿旋向相反。
  2. 根据权利要求1所述的铰链，其特征在于，还包括轴向连接于所述第一中间棘轮(5)与所述第二中间棘轮(6)之间的若干根滑动杆(9)、穿设于各根所述滑动杆(9)上并与连接线缆相连的转轮(10)，所述第一中间棘轮(5)及所述第二中间棘轮(6)均可滑动地套设于各根所述滑动杆(9)上。
  3. 根据权利要求2所述的铰链，其特征在于，所述固定轴(3)的末端端面开设有安装槽，所述活动轴(4)的末端可旋转地插设于所述安装槽内；所述固定轴(3)的末端与所述活动轴(3)的末端均套设有轴环(11)，且两所述轴环(11)分别压紧所述转轮(10)的两端端面。
  4. 根据权利要求3所述的铰链，其特征在于，所述轴环(11)压紧于所述转轮(10)的端面内圈区域，各根所述滑动杆(9)穿设于所述转轮(10)的端面外圈区域。
  5. 根据权利要求1所述的铰链，其特征在于，所述第一弹簧(7)套设于所述固定轴(3)上，且所述第一弹簧(7)的两端分别连接在所述固定棘轮(1)与所述第一中间棘轮(5)的内壁上；所述第二弹簧(8)套设于所述活动轴(4)上，且所述第二弹簧(8)的两端分别连接在所述活动棘轮(2)与所述第二中间棘轮(6)的内壁上。
  6. 根据权利要求2-5任一项所述的铰链，其特征在于，还包括首端与所述转轮(10)动力连接且末端与连接线缆相连、用于缩减所述连接线缆的位 移量的减速传动机构(12)。
  7. 根据权利要求6所述的铰链，其特征在于，所述转轮(10)为主动齿轮，且所述减速传动机构(12)为与所述主动齿轮啮合传动的被动减速齿轮组，所述连接线缆连接于所述被动减速齿轮组的输出轴。
  8. 根据权利要求6所述的铰链，其特征在于，所述转轮(10)为蜗杆，且所述减速传动机构(12)为与所述蜗杆啮合传动的涡轮，且所述连接线缆连接于所述涡轮的输出轴。
  9. 根据权利要求6所述的铰链，其特征在于，还包括与所述连接线缆相连、用于在其产生一定位移量后将其复位的复位机构。
  10. 一种可穿戴设备，包括固定件、可翻转地连接于所述固定件的活动件、连接于所述固定件与所述活动件之间的连接线缆及铰链，其特征在于，所述铰链具体为权利要求1-9任一项所述的铰链。
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