Rotating shaft and electronic device

Abstract

Provided in the present application are a rotating shaft and an electronic device. The rotating shaft comprises at least one damping module; the damping module comprises a mounting shaft, rotating members, a first cam and a second cam, the rotating members, the first cam and the second cam all being rotatably connected to the mounting shaft; first fitting gear teeth are provided at a first end of each rotating member, and second fitting gear teeth are provided at a second end of each rotating member; the first cam is provided with first gear teeth, and the first gear teeth comprises a first damping part, a first included angle being provided between the first damping part and the radial direction of the mounting shaft; the second cam is provided with second gear teeth, and the second gear teeth comprises a hovering part, a second included angle being provided between the hovering part and the radial direction of the mounting shaft, and the second included angle being larger than the first included angle; the fitting gear teeth of the rotating members can fit the first gear teeth or the second gear teeth. By means of the cooperation of the first cam and the second cam having different surface types, the present application can achieve both opening / closing hand feeling feedback and hovering functions of electronic devices, and is convenient to design.

Description

Shafts and electronic equipment

[0001] This invention claims priority to the Chinese patent application filed with the State Intellectual Property Office on August 28, 2023, with application number 202311082908.7 and application name “Shaft and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic products, and in particular to a rotating shaft and an electronic device. Background Art

[0003] With the development of foldable electronic devices, users have higher requirements for the folding feel and hovering angle of these devices. Traditional damping mechanisms only contain a single cam surface type. This surface type must control the opening and closing feel of the folded and unfolded states of the foldable device, as well as the hovering design, making it difficult to adjust.

[0004] Summary of the Invention

[0005] The purpose of this application is to provide a hinge and an electronic device, so as to adjust the opening and closing feel and the hovering angle through a combination of different surface shapes.

[0006] In a first aspect, the present application provides a rotating shaft, comprising at least one damping module, wherein the damping module comprises:

[0007] Install the shaft;

[0008] a rotating member, the rotating member being rotatably connected to the mounting shaft and slidingly engaged with the mounting shaft along the axial direction of the mounting shaft, the first end of the rotating member being provided with a first mating gear tooth, and the second end of the rotating member being provided with a second mating gear tooth;

[0009] a first cam disposed on the mounting shaft, wherein the first cam is provided with first gear teeth, the first gear teeth including a first damping portion, and a first angle is formed between the first damping portion and a radial direction of the mounting shaft;

[0010] a second cam disposed on the mounting shaft, the second cam being provided with second gear teeth, the second gear teeth including a hovering portion, a second angle being formed between the hovering portion and a radial direction of the mounting shaft, the second angle being greater than the first angle;

[0011] The second mating gear teeth of the rotating member are in sliding contact with the second gear teeth of one of the second cams, and the first mating gear teeth of the rotating member are in sliding contact with the first gear teeth of one of the first cams, or are in sliding contact with the second gear teeth of another of the second cams.

[0012] Therefore, the present application can simultaneously realize the opening and closing feel feedback and hovering function of the electronic device by cooperating with the first cam and the second cam with different surface shapes, and the two surface shapes of the cams can be designed respectively according to the corresponding functions, and the design difficulty is low.

[0013] In a possible design, the second angle is 10° to 35°, wherein within this angle range, the electronic device can be hovered within a relatively large opening and closing angle range.

[0014] In one possible design, the first angle is between 0 and 10 degrees. Within this angle range, the first damping portion is relatively flat, enabling a nearly constant damping force between the rotating member and the first cam when the first mating gear teeth of the rotating member engage with the first damping portion of the first cam. This damping force is less than the damping force between the second mating gear teeth and the hovering portion of the second cam. This ensures a smooth folding action of the electronic device, preventing jamming, while also maintaining a hovering effect.

[0015] In one possible design, the length of the hovering portion is greater than the length of the first damping portion. The position where the first damping portion contacts and engages with the first mating gear corresponds to a portion of the angular range within which the electronic device needs to hover. However, since the first angle is relatively small, a good hovering effect cannot be achieved by relying on the cooperation of the first cam and the rotating member. Therefore, a hovering effect can be achieved by relying on the cooperation of the second cam and the rotating member. Furthermore, by making the length of the hovering portion greater than the length of the first damping portion, hovering can be achieved within a wider angular range.

[0016] In a possible design, the first gear tooth also includes a second damping part and a third damping part, and the second damping part and the third damping part are respectively located on both sides of the first damping part and are smoothly connected to the first damping part; the second damping part and the third damping part both extend in a direction away from the rotating part, and the distance between the second damping part and the third damping part gradually increases from the side close to the first damping part to the side away from the first damping part.

[0017] Among them, the mating gear teeth on the rotating part can generate a sudden change in force between the rotating part and the first cam when passing through the second damping part and the first damping part, or when passing through the first damping part and the third damping part, thereby obtaining the opening and closing feedback feel.

[0018] In one possible design, a slider and an elastic member are further included. The slider is connected to the mounting shaft, one end of the elastic member is connected to the first cam, and the other end of the elastic member is connected to the slider. The first cam is slidably connected to the mounting shaft. The second cam, the slider, and the mounting shaft can move synchronously to adjust the position of the second cam relative to the rotating member, ensuring that the second cam can maintain contact with the rotating member. At the same time, the elastic member can push the first cam to slide relative to the mounting shaft through its own elastic deformation to ensure that the first cam can maintain contact with the rotating member. This can achieve both the opening and closing feel achieved by providing damping force through the first cam and the hovering function within a wide angle range.

[0019] In one possible design, the rotating shaft further includes a retaining spring fixedly mounted on the mounting shaft, the slider being disposed between the retaining spring and the elastic member, with both sides of the slider respectively abutting against the retaining spring and the elastic member. The retaining spring can be fixed to the mounting shaft to limit the axial position of the slider, while also facilitating elastic deformation of the elastic member between the first cam and the slider, thereby facilitating adaptive axial position adjustment of the first cam.

[0020] In one possible design, the mounting shaft includes a first shaft and a second shaft, the first shaft being arranged parallel to the second shaft. The rotating member includes a first swing arm and a second swing arm, the first swing arm being rotatably connected to the first shaft, and the second swing arm being rotatably connected to the second shaft. The first cam is provided with a first hole and a second hole, the first cam being slidably mounted on the first shaft through the first hole, and the first cam being slidably mounted on the second shaft through the second hole, thereby enabling the first cam to slide relative to the mounting shaft. The first cam is provided with first gear teeth around the first hole and the second hole, respectively. The first mating gear teeth at the first end of the first swing arm are in sliding contact with the first gear teeth of the first cam around the first hole, and the first mating gear teeth at the first end of the second swing arm are in sliding contact with the first gear teeth of the first cam around the second hole. The first cam is an integrally molded structure, and the first hole, the second hole, and the first gear teeth around the first hole and the second hole can be directly molded during the molding process. This ensures that the first swing arm and the first cam, as well as the second swing arm and the first cam, have the same force conditions during rotation of the first and second swing arms.

[0021] In one possible design, the second cam is provided with a third hole and a fourth hole, the second cam is sleeved on the first shaft through the third hole, and the second cam is sleeved on the second shaft through the fourth hole, wherein the first and second shafts may be provided with a shoulder or a retaining spring, and the shoulder or retaining spring may be located on the side of the second cam facing away from the first cam to achieve axial limitation of the second cam, and the second cam can maintain contact with the shoulder or retaining spring through the elastic force provided by the elastic member, so that the second cam cannot slide relative to the mounting shaft, but can move synchronously with the mounting shaft. The second cam is provided with second gear teeth around the third hole and the fourth hole, respectively, and the second mating gear teeth at the second end of the first swing arm are in sliding contact with the second gear teeth of the second cam around the third hole, and the second mating gear teeth at the second end of the second swing arm are in sliding contact with the second gear teeth of the second cam around the fourth hole. Among them, the second cam is an integrally molded structure, which can directly form the third hole, the fourth hole and the second gear teeth located around the third hole and the fourth hole during the molding process, so that during the rotation of the first swing arm and the second swing arm, the first swing arm and the second cam and the second swing arm and the second cam have the same force state.

[0022] In one possible design, the slider is provided with a fifth hole and a sixth hole. The slider is sleeved onto the first shaft through the fifth hole, and the slider is sleeved onto the second shaft through the sixth hole. The slider can also be an integrally formed structure, thereby ensuring that the connection state with the mounting shaft at the fifth and sixth holes is consistent, improving consistency.

[0023] In one possible design, the damping module is provided in plurality, with some damping modules including the first cam and the second cam, and / or some damping modules including two first cams, and / or some damping modules including two second cams. This allows for greater flexibility in the design and application of the damping module structure.

[0024] The second aspect of the present application also provides an electronic device, which includes a first body, a second body and the rotating shaft provided by the first aspect of the present application, and the first body and the second body are rotatably arranged on both sides of the rotating shaft through a rotating member in the rotating shaft.

[0025] Among them, the electronic device including the above-mentioned rotating shaft has the similar technical effect as the above-mentioned rotating shaft, which will not be described in detail here.

[0026] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of an electronic device provided in an embodiment of the present application in a flattened state;

[0028] FIG2 is a schematic diagram of an electronic device in a folded state provided by an embodiment of the present application;

[0029] FIG3 is a schematic structural diagram of a rotating shaft provided in an embodiment of the present application;

[0030] FIG4 is a front view of FIG3;

[0031] FIG5 is a schematic structural diagram of a damping module provided in an embodiment of the present application from one viewing angle;

[0032] FIG6 is a schematic structural diagram of a damping module provided in an embodiment of the present application from another perspective;

[0033] FIG7 is a front view of a damping module provided in an embodiment of the present application;

[0034] FIG8 is another structural schematic diagram of a rotating shaft provided in an embodiment of the present application;

[0035] FIG9 is a front view of FIG8;

[0036] FIG10 is a schematic diagram of the surface of the first cam provided in an embodiment of the present application;

[0037] FIG11 is a schematic diagram of the surface of the second cam provided in an embodiment of the present application;

[0038] FIG12 is a schematic diagram of the surface of the first cam provided in an embodiment of the present application;

[0039] FIG13 is a torque curve diagram of a rotating shaft provided by an embodiment of the present application when only the first cam is included;

[0040] FIG14 is a schematic diagram comparing the torque curve of the rotating shaft provided in an embodiment of the present application when the rotating shaft includes both the first cam and the second cam and when the rotating shaft includes only the first cam.

[0041] Figure numerals: 100-rotating shaft; 110-damping module; 120-structural member; 200-first body; 300-second body; 1-mounting shaft; 11-first shaft; 12-second shaft; 2-first cam; 21-first gear tooth; 211-first damping part; 212-second damping part; 213-third damping part; 214-first smooth part; 215-second smooth part; 3-second cam; 31-second gear tooth; 311-hovering part; 4-rotating member; 41-first swing arm; 42-second swing arm; 43-first mating gear tooth; 44-second mating gear tooth; 5-slider; 6-elastic member; 7-circlip; α-first angle; β-second angle; X-axial direction; Y-radial direction.

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0044] In the description of this application, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also indirectly connected to the other element "on" or "under" through an intermediate element.

[0046] A foldable electronic device usually includes a screen and a hinge. The parts of the screen on both sides of the hinge can rotate relative to the hinge to achieve folding or flattening of the screen. The hinge usually has a damping module, which can provide damping force during the folding process of the foldable electronic device to provide user feedback on the folding feel and folding angle hovering. The damping module is usually provided with multiple cams, and the surface shape of each cam is consistent. This surface shape is needed to provide damping force to meet the opening and closing feel of the foldable electronic device and to achieve the required hovering angle. However, a single surface shape can usually only meet the design requirements of the damping force or the hovering angle, and it is difficult to meet the design requirements of both at the same time.

[0047] An embodiment of the present application provides a hinge, which can be used in an electronic device. The electronic device can be a folding mobile phone, a folding tablet computer, or other device that has a hinge 100 and can be folded relative to the hinge 100. This embodiment does not limit the type of electronic device.

[0048] FIG1 is a schematic diagram of an electronic device provided in an embodiment of the present application in a flattened state, and FIG2 is a schematic diagram of an electronic device provided in an embodiment of the present application in a folded state. FIG1 and FIG2 only exemplarily illustrate that the electronic device is a folding mobile phone, and use this as an example for schematic illustration. Referring to FIG1 and FIG2, the electronic device includes a first body 200 and a second body 300, and the first body 200 and the second body 300 are rotatably arranged on both sides of the rotating shaft 100 through the rotating member 4 in the rotating shaft 100. Among them, when the electronic device is a folding mobile phone, the first body 200 and the second body 300 can be the middle frame of the folding mobile phone, and the middle frame can be covered with a flexible screen, and the flexible screen can be bent at the position corresponding to the rotating shaft 100.

[0049] In this embodiment, the hinge 100 includes at least one damping module 110, which may have one or more damping modules 110, and can provide damping force to the electronic device during rotation to provide feedback on the opening and closing feel of the electronic device, and can also enable the electronic device to hover when opened and closed to a suitable angle.

[0050] Among them, Figure 3 is a structural schematic diagram of the rotating shaft 100 provided in an embodiment of the present application, and Figure 4 is a front view of Figure 3. Referring to Figures 3 and 4, the rotating shaft 100 also includes a structural member 120, which can be the outer shell of the rotating shaft 100. The damping module 110 is arranged on the structural member 120. The structural member 120 can provide an installation environment for the damping module 110, and can also provide a protective effect for the damping module 110.

[0051] Figure 5 is a structural schematic diagram of the damping module 110 provided in an embodiment of the present application at one perspective, Figure 6 is a structural schematic diagram of the damping module 110 provided in an embodiment of the present application at another perspective, and Figure 7 is a front view of the damping module 110 provided in an embodiment of the present application. Referring to Figures 5 to 7, the damping module 110 includes a rotating member 4, wherein the rotating member 4 can be connected to the first body 200 or the second body 300 of the electronic device. Exemplarily, in a damping module 110, at least two rotating members 4 can be provided, wherein at least one rotating member 4 can be connected to the first body 200 of the electronic device, and at least another rotating member 4 can be connected to the second body 300 of the electronic device. Thus, the first body 200 and the second body 300 can be connected to the rotating shaft 100 through the rotating member 4, and at the same time, the first body 200 and the second body 300 can be driven to rotate relative to each other by the rotating member 4, thereby realizing the unfolding or folding of the electronic device.

[0052] 7 , the damping module 110 further includes a mounting shaft 1 , on which a rotating member 4 is rotatably mounted. The rotating member 4 only rotates within the rotating shaft 100 without displacement, and the mounting shaft 1 can move relative to the rotating member 4 in the axial direction X. A first cam 2 and a second cam 3 are both connected to the mounting shaft 1 . The second cam can be fixed relative to the mounting shaft 1 and can move synchronously with the mounting shaft 1 in the axial direction X. Relative sliding between the first cam and the mounting shaft 1 is possible. Among them, since the surfaces on the gear teeth on the first cam 2 and the second cam 3 for cooperating with the rotating member 4 are curved surfaces, when the rotating member 4 contacts different positions on the gear teeth of the first cam 2 and the second cam 3, the axial X distances between the first cam 2 and the second cam 3 and the rotating member 4 will change. At this time, when the rotating member 4 contacts and cooperates with the first cam 2 at different positions, the first cam 2 can slide relative to the mounting shaft 1, and the first cam 2 mounting shaft 1 rotates the rotating member 4 axially X. At the same time, when the rotating member 4 contacts and cooperates with the second cam 3 at different positions, the second cam 3 and the mounting shaft 1 can move synchronously relative to the axial X of the rotating member 4. The second cam 3 can thereby ensure that the rotating member 4 rotates without jamming relative to the mounting shaft 1, and at the same time, it can ensure that the damping force feedback of the opening and closing of the whole machine is realized through contact with the first cam 2, and the hovering function is realized through contact with the second cam 3.

[0053] 7 , the first cam 2 is provided with a first gear tooth 21, and the second cam 3 is provided with a second gear tooth 31. Along the axial direction X of the mounting shaft 1, the first end of the rotating member 4 is provided with a first mating gear tooth 43, and the second end of the rotating member 4 is provided with a second mating gear tooth 44. The first mating gear tooth 43 and the second mating gear tooth 44 can both be mated with one of the first gear tooth 21 and the second gear tooth 31. The first gear tooth 21 and the second gear tooth 31 have different surface shapes. For example, in the same damping module 110, the first mating gear tooth 43 can be mated with the first gear tooth 21 of one first cam 2, and the second mating gear tooth 44 can be mated with the first gear tooth 21 of another first cam 2. In this case, the first mating gear tooth 43 and the second mating gear tooth 44 can have the same surface shape. Of course, the first mating gear tooth 43 and the second mating gear tooth 44 can also have the same surface shape as the first gear tooth 21. For example, in the same damping module 110, the first mating gear tooth 43 can be mated with the second gear tooth 31 of one second cam 3, and the second mating gear tooth 44 can be mated with the first gear tooth 21 of another first cam 2. The teeth 44 can cooperate with the second gear teeth 31 of another second cam 3. At this time, the first mating gear teeth 43 and the second mating gear teeth 44 can have the same surface shape. Of course, the first mating gear teeth 43 and the second mating gear teeth 44 can also have the same surface shape as the second gear teeth 31; for example, in the same damping module 110, the first mating gear teeth 43 can cooperate with the first gear teeth 21 of a first cam 2, and the second mating gear teeth 44 can cooperate with the second gear teeth 31 of a second cam 3. At this time, the first mating gear teeth 43 can have the same surface shape as the first gear teeth 21, and the second mating gear teeth 44 can have the same surface shape as the second gear teeth 31.

[0054] Among them, the first cam 2 can provide damping force for the electronic device through the cooperation of the first gear teeth 21 and the first matching gear teeth 43 on the rotating part 4, so as to provide feedback to the user on the opening and closing feel. The second cam 3 can enable the electronic device to achieve folding and hovering within a certain angle range through the cooperation of the second gear teeth 31 and the second matching gear teeth 44 on the rotating part 4. 3 and 4 , when a damping module 110 includes both the first cam 2 and the second cam 3, the damping module 110 can be used to simultaneously meet the requirements of the opening and closing feel and the hovering function of the entire machine. Of course, multiple damping modules 110 can be applied to the rotating shaft 100 to enhance the overall opening and closing feel and the hovering effect. By way of example, FIG8 is another structural schematic diagram of the rotating shaft 100 provided in an embodiment of the present application, and FIG9 is a front view of FIG8 . Referring to FIG8 and FIG9 , when a damping module 110 includes only the first cam 2 or the second cam 3, at least one damping module 110 including only the first cam 2 and at least one damping module 110 including only the second cam 3 can be used in combination in the rotating shaft 100. The requirements of the opening and closing feel of the entire machine can be met by the damping module 110 including only the first cam 2, and the hovering function of the entire machine can be met by the damping module 110 including only the second cam 3. Thus, the opening and closing feel and the hovering function of the entire machine can also be met simultaneously.

[0055] Among them, Figure 10 is a surface schematic diagram of the first cam 2 provided in an embodiment of the present application. Referring to Figure 10, the first gear tooth 21 includes a first damping portion 211, and a first angle α is formed between the first damping portion 211 and the radial direction Y of the mounting shaft 1; Figure 11 is a surface schematic diagram of the second cam 3 provided in an embodiment of the present application. Referring to Figure 11, the second gear tooth 31 includes a hovering portion 311, and a second angle β is formed between the hovering portion 311 and the radial direction Y of the mounting shaft 1, and the second angle β is greater than the first angle α.

[0056] For ease of illustration, a damping module 110 including both a first cam 2 and a second cam 3 is used as an example. During the switching process of the electronic device from a folded state to a flattened state, the first mating gear 43 can obtain different force feedback before and after contact with the first damping portion 211, thereby achieving a different opening and closing feel. For example, FIG12 is a schematic diagram of the surface of the first cam 2 provided in an embodiment of the present application. Referring to FIG12 , the first gear 21 also includes a second damping portion 212 and a third damping portion 213. The second damping portion 212 and the third damping portion 213 are respectively located on either side of the first damping portion 211 and smoothly transition to the first damping portion 211. The second damping portion 212 and the third damping portion 213 both extend away from the rotating member 4, and the distance between the second damping portion 212 and the third damping portion 213 gradually increases from the side closer to the first damping portion 211 to the side farther away from the first damping portion 211. Among them, there is no clear boundary between the first damping part 211, the second damping part 212 and the third damping part 213. The first damping part 211, the second damping part 212 and the third damping part 213 can form a complete and continuous gear tooth surface. For the convenience of explanation, this embodiment divides the gear tooth surface into the above-mentioned three damping parts. Each damping part has at least a part that can contact the matching gear teeth on the rotating part 4 to provide corresponding damping force for the rotating part 4.

[0057] 12 , there is a first smooth portion 214 between the first damping portion 211 and the second damping portion 212, and the first smooth portion 214 can make a certain angle between the extension directions of the first damping portion 211 and the second damping portion 212. Similarly, there is a second smooth portion 215 between the first damping portion 211 and the third damping portion 213, and the second smooth portion 215 can make a certain angle between the extension directions of the first damping portion 211 and the third damping portion 213. That is, the slopes of the second damping portion 212 and the third damping portion 213 are steeper, and the slope of the first damping portion 211 is gentler.

[0058] FIG13 is a torque curve diagram of the rotating shaft 100 provided in an embodiment of the present application when only the first cam 2 is included. Referring to FIG12 and FIG13 , when the electronic device rotates from a folded state to a flattened state, the first mating gear 43 on the rotating member 4 first contacts the second damping portion 212. Due to the large slope of the second damping portion 212, the damping force between the first mating gear 43 and the rotating member 4 is large, and the torque of the rotating shaft 100 is large. When the electronic device is opened to a certain angle, the first mating gear 43 will pass over the first smooth portion 214 and contact the first damping portion 211. Due to the small slope of the first damping portion 211, after the first mating gear 43 passes the first smooth portion 214, the damping force between the first cam 2 and the rotating member 4 will change significantly, that is, the damping force becomes smaller and the torque of the rotating shaft 100 decreases. This sudden change in the torque of the rotating shaft 100 will provide the user with the first opening and closing feel, which represents the feel when the electronic device begins to unfold.

[0059] As the electronic device continues to unfold toward the flat state, the first mating gear 43 slides in contact with the first damping portion 211 . Since the slope of the first damping portion 211 is relatively gentle, the damping force between the rotating member 4 and the first cam 2 is relatively stable.

[0060] When the first mating gear tooth 43 passes over the second smooth portion 215 and contacts the third damping portion 213, due to the large slope of the third damping portion 213, after the first mating gear tooth 43 passes through the second smooth portion 215, the damping force between the first cam 2 and the rotating member 4 will produce a large change, thereby providing the user with feedback on the second opening and closing feel, which represents the feel when the electronic device is about to be flattened.

[0061] In addition, when the electronic device switches from a flat state to a folded state, the movement path of the first mating gear 43 on the first cam 2 is opposite, and the force state of the first mating gear 43 and the first gear 21 at the corresponding mating position is similar to the force state when the electronic device switches from a folded state to an unfolded state in the previous text, and will not be repeated here.

[0062] FIG14 is a schematic diagram comparing the torque curve of the rotating shaft 100 provided in an embodiment of the present application when the first cam 2 and the second cam 3 are included at the same time and the torque curve when the first cam 2 is included only. The horizontal axis is the angle, the vertical axis is the torque, curve a is the torque curve when the rotating shaft 100 includes only the first cam 2, and curve b is the torque curve when the rotating shaft 100 includes both the first cam 2 and the second cam 3. Referring to FIG14 , for the cooperation process between the rotating member 4 and the second cam 3, during the movement of the electronic device from the folded state to the flattened state, the second cooperating gear teeth 44 of the rotating member 4 and the first cooperating gear teeth 45 of the rotating member 4 cooperate with each other. The second gear teeth 31 of the second cam 3 remain engaged. Since the second angle β is greater than the first angle α, during the entire process of the first mating gear teeth 43 and the first damping part 211 mating, a relatively larger friction force can be generated between the second gear teeth 31 and the second mating gear teeth 44, so that the rotating shaft 100 generates a larger torque (refer to the portion of the curve b corresponding to the horizontal coordinate angle between 60° and 120° in FIG14 ). That is to say, referring to FIG14 , within the horizontal coordinate angle of 60° to 120°, the torque corresponding to the curve b is greater than the torque corresponding to the curve a, thereby enabling the electronic device to hover within a larger folding angle range.

[0063] Therefore, by cooperating with the first cam 2 and the second cam 3 with different surface shapes, the opening and closing feel feedback and hovering function of the electronic device can be realized simultaneously, and the two surface shapes of the cams can be designed respectively according to the corresponding functions, and the design difficulty is low.

[0064] In one embodiment, the second angle β may be 10° to 35°, which allows the electronic device to hover within a larger opening and closing angle range. Optionally, the second angle β may be 10°, 15°, 20°, 25°, 30°, or 35°, which facilitates the electronic device to hover within an angle range of 60° to 120°.

[0065] In one embodiment, the first angle α can be 0 to 10 degrees. Within this angle range, the first damping portion 211 is relatively flat, so that when the first mating gear 43 of the rotating member 4 is mated with the first damping portion 211 on the first cam 2, there is a nearly constant damping force between the rotating member 4 and the first cam 2, and this damping force is less than the damping force between the second mating gear 44 and the hovering portion 311 of the second cam 3. This can ensure a smooth folding action of the electronic device to avoid jamming and ensure a hovering effect. Optionally, the first angle α can be 3 degrees, 5 degrees, 8 degrees, or 10 degrees.

[0066] In one embodiment, the length of the hovering portion 311 is greater than the length of the first damping portion 211, wherein the position where the first damping layer contacts and cooperates with the first mating gear 43 corresponds to a part of the angle range in which the electronic device needs to hover, but since the first angle is relatively small, it is difficult to obtain a good hovering effect by relying on the cooperation of the first cam 2 and the rotating member 4, so the hovering effect can be obtained by the cooperation of the second cam 3 and the rotating member 4. At the same time, by making the length of the hovering portion 311 greater than the length of the first damping portion 211, hovering can be achieved within a larger angle range, for example, within an angle range of 60° to 120°.

[0067] In one embodiment, the device further includes a slider 5 and an elastic member 6. The slider 5 is connected to the mounting shaft 1. One end of the elastic member 6 is connected to the first cam 2, and the other end of the elastic member 6 is connected to the slider 5. The first cam 2 is slidably connected to the mounting shaft 1. To facilitate installation, the elastic member 6 can be a spring.

[0068] The position of the slider 5 on the mounting shaft 1 is relatively fixed and can move synchronously with the mounting shaft 1. Since the position of the second cam 3 on the mounting shaft 1 is also relatively fixed, the second cam 3, the slider 5, and the mounting shaft 1 can move synchronously. The first cam 2 can slide relative to the mounting shaft 1 due to the elastic force of the elastic member 6. When the various mating gear teeth on the rotating member 4 contact and mate with different parts of the corresponding first gear teeth 21 and second gear teeth 31, the second cam 3, the slider 5, and the mounting shaft 1 can move synchronously to adjust the position of the second cam 3 relative to the rotating member 4, ensuring that the second cam 3 can maintain contact with the rotating member 4. At the same time, the elastic member 6 can push the first cam 2 to slide relative to the mounting shaft 1 through its own elastic deformation, ensuring that the first cam 2 can maintain contact with the rotating member 4. This can achieve both the opening and closing feel achieved by providing a damping force through the first cam 2 and the hovering function within a wide angle range.

[0069] In one embodiment, referring to FIG7 , the rotating shaft 100 further includes a retaining spring 7, which is fixedly sleeved on the mounting shaft 1. The slider 5 is disposed between the retaining spring 7 and the elastic member 6, with both sides of the slider 5 respectively abutting against the retaining spring 7 and the elastic member 6. The retaining spring 7 can be fixed to the mounting shaft 1 to limit the axial X position of the slider 5. This also facilitates elastic deformation of the elastic member 6 between the first cam 2 and the slider 5, thereby facilitating adaptive axial X position adjustment of the first cam 2.

[0070] In one embodiment, referring to FIG7 , the mounting shaft 1 includes a first shaft 11 and a second shaft 12, the first shaft 11 and the second shaft 12 being arranged parallel to each other. The rotating member 4 includes a first swing arm 41 and a second swing arm 42, the first swing arm 41 being rotatably connected to the first shaft 11, and the second swing arm 42 being rotatably connected to the second shaft 12. Along the axial direction X of the mounting shaft 1, the first swing arm 41 and the second swing arm 42 remain in a fixed position within the electronic device, and the first swing arm 41 and the second swing arm 42 can only rotate about the corresponding mounting shaft 1. The first swing arm 41 can be connected to one of the first body 200 and the second body 300 of the electronic device, while the second swing arm 42 is connected to the other, thereby enabling the first body 200 and the second body 300 to open and close via the first swing arm 41 and the second swing arm 42. The first cam 2 is provided with a first hole (not shown) and a second hole (not shown). The first cam 2 is slidably mounted on the first shaft 11 through the first hole, and the first cam 2 is slidably mounted on the second shaft 12 through the second hole, thereby enabling the first cam 2 to slide relative to the mounting shaft 1. The first cam 2 is provided with first gear teeth 21 around the first hole and the second hole, respectively. The first mating gear teeth 43 at the first end of the first swing arm 41 are in sliding contact with the first gear teeth 21 around the first hole of the first cam 2. The first mating gear teeth 43 at the first end of the second swing arm 42 are in sliding contact with the first gear teeth 21 around the second hole of the first cam 2. The first cam 2 is an integrally molded structure, and the first hole, the second hole, and the first gear teeth 21 around the first hole and the second hole are directly molded during the molding process. This ensures that the first swing arm 41 and the first cam 2, as well as the second swing arm 42 and the first cam 2, have the same force applied to them during rotation.

[0071] In one embodiment, the second cam 3 is provided with a third hole (not shown) and a fourth hole (not shown). The second cam 3 is sleeved on the first shaft 11 through the third hole, and the second cam 3 is sleeved on the second shaft 12 through the fourth hole. A shoulder or a retaining spring may be provided on the first shaft 11 and the second shaft 12. The shoulder or retaining spring may be located on the side of the second cam 3 facing away from the first cam 2 to axially limit the second cam 3. The second cam 3 can maintain contact with the shoulder or retaining spring via the elastic force provided by the elastic member 6, so that the second cam 3 cannot slide relative to the mounting shaft 1 and can move synchronously with the mounting shaft 1. The second cam 3 is provided with second gear teeth 31 around the third hole and the fourth hole, respectively. The second mating gear teeth 44 at the second end of the first swing arm 41 are in sliding contact with the second gear teeth 31 of the second cam 3 around the third hole, and the second mating gear teeth 44 at the second end of the second swing arm 42 are in sliding contact with the second gear teeth 31 of the second cam 3 around the fourth hole. Among them, the second cam 3 is an integrally molded structure, which can directly form the third hole, the fourth hole and the second gear teeth 31 located around the third hole and the fourth hole during the molding process, so that during the rotation of the first swing arm 41 and the second swing arm 42, the first swing arm 41 and the second cam 3 and the second swing arm 42 and the second cam 3 have the same force state.

[0072] In one embodiment, the slider 5 is provided with a fifth hole (not shown in the figure) and a sixth hole (not shown in the figure). The slider 5 is sleeved on the first shaft 11 through the fifth hole, and the slider 5 is sleeved on the second shaft 12 through the sixth hole. Specifically, an interference fit can be adopted, or the aforementioned retaining spring 7 can be used to assist in fixing. The slider 5 can also be an integrally formed structure, so as to ensure that the connection state with the mounting shaft 1 at the fifth and sixth holes is consistent, thereby improving consistency.

[0073] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A rotating shaft, characterized in that: The invention comprises at least one damping module, wherein the damping module comprises: Install the shaft; A rotating member, the rotating member is rotatably connected to the installation shaft, and along the axial direction of the installation shaft, the rotating member and the installation shaft are slidably matched, the first end of the rotating member is provided with a first matching gear tooth, and the second end of the rotating member is provided with a second matching gear tooth; A first cam is disposed on the mounting shaft, the first cam is provided with a first gear tooth, the first gear tooth includes a first damping portion, and a first angle is formed between the first damping portion and a radial direction of the mounting shaft; a second cam, disposed on the mounting shaft, the second cam being provided with a second gear tooth, the second gear tooth comprising a hovering portion, a second angle being formed between the hovering portion and a radial direction of the mounting shaft, the second angle being greater than the first angle; The second mating gear teeth of the rotating member are in sliding contact with the second gear teeth of one of the second cams, and the first mating gear teeth of the rotating member are in sliding contact with the first gear teeth of one of the first cams, or are in sliding contact with the second gear teeth of another of the second cams.

2. The rotating shaft according to claim 1, characterized in that: The second angle is 10° to 35°.

3. The rotating shaft according to claim 1 or 2, characterized in that: The first angle is 0-10°.

4. The rotating shaft according to claim 1 or 2, characterized in that: The length of the suspension portion is greater than the length of the first damping portion.

5. The rotating shaft according to claim 1 or 2, characterized in that: The first gear tooth further includes a second damping portion and a third damping portion, wherein the second damping portion and the third damping portion are respectively located on both sides of the first damping portion and are smoothly connected to the first damping portion; The second damping portion and the third damping portion both extend in a direction away from the rotating member, and a distance between the second damping portion and the third damping portion gradually increases from a side close to the first damping portion to a side away from the first damping portion.

6. The rotating shaft according to claim 1 or 2, characterized in that: It also includes a slider and an elastic member, wherein the slider is connected to the mounting shaft, one end of the elastic member is connected to the first cam, and the other end of the elastic member is connected to the slider; The first cam is slidably connected to the mounting shaft.

7. The rotating shaft according to claim 6, characterized in that: It also includes a clamping spring, which is fixedly sleeved on the installation shaft, and the sliding block is arranged between the clamping spring and the elastic member, and two sides of the sliding block are respectively in contact with the clamping spring and the elastic member.

8. The rotating shaft according to claim 6, characterized in that: The installation shaft includes a first shaft and a second shaft, the first shaft is arranged in parallel with the second shaft, the rotating member includes a first swing arm and a second swing arm, the first swing arm is rotatably connected to the first shaft, and the second swing arm is rotatably connected to the second shaft; The first cam is provided with a first hole and a second hole, the first cam is slidably mounted on the first shaft through the first hole, and the first cam is slidably mounted on the second shaft through the second hole; the first cam is provided with the first gear teeth around the first hole and the second hole, respectively, the first matching gear teeth at the first end of the first swing arm are in sliding contact with the first gear teeth of the first cam around the first hole, and the first matching gear teeth at the first end of the second swing arm are in sliding contact with the first gear teeth of the first cam around the second hole.

9. The rotating shaft according to claim 8, characterized in that: The second cam is provided with a third hole and a fourth hole, the second cam is sleeved on the first shaft through the third hole, and the second cam is sleeved on the second shaft through the fourth hole; the second cam is provided with the second gear teeth around the third hole and the fourth hole respectively, the second matching gear teeth at the second end of the first swing arm are in sliding contact with the second gear teeth of the second cam around the third hole, and the second matching gear teeth at the second end of the second swing arm are in sliding contact with the second gear teeth of the second cam around the fourth hole.

10. The rotating shaft according to claim 9, characterized in that: The slider is provided with a fifth hole and a sixth hole. The slider is sleeved on the first shaft through the fifth hole, and the slider is sleeved on the second shaft through the sixth hole.

11. The rotating shaft according to claim 1, characterized in that: The damping modules are provided in plurality, some of which include the first cam and the second cam, and / or, Part of the damping module comprises two first cams, and / or, The partial damping module comprises two of said second cams.

12. An electronic device, characterized in that: It comprises a first body, a second body and the rotating shaft according to any one of claims 1 to 11, wherein the first body and the second body are rotatably arranged on both sides of the rotating shaft through a rotating member in the rotating shaft.

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