Rotating shaft mechanism and device with opening and closing performance

Abstract

The present application provides a rotating shaft mechanism and a device with opening and closing performance. The rotating shaft mechanism can provide two kinds of torques. One is the constant torque provided by the cooperation between the bracket and the constant torque structure of the rotating shaft, and the other is the variable torque provided by the cooperation between the swing arm, the roller and the variable torque structure of the rotating shaft. Moreover, the inclined surface design of the guiding inclined surface of the roller bin of the swing arm can enable the rotating shaft to generate a greater extrusion force between the roller and the variable torque structure when the roller is at the bottom of the roller bin compared to when it is at the top of the roller bin at the same rotation angle of the rotating shaft, so as to generate a greater damping force to provide a greater torque for the rotating shaft, enabling the rotating shaft to have different torques in the same angle and opposite rotation directions, so that the device equipped with the rotating shaft mechanism has the characteristic of easy opening and heavy closing, realizing the single-handed opening and closing of the device.

Description

Technical Field

[0001] The present application relates to the field of electronic devices, and more specifically, to a rotating shaft mechanism and a device with opening and closing performance. Background Art

[0002] As a key component of a device, the rotating shaft is a bridge connecting different components of the device. Different components of the device are connected by hinges to achieve relative rotation to control the relative angle to meet the requirements of a comfortable user experience. For example, a notebook computer connects the screen component and the host component through a rotating shaft, and rotating the screen component to a certain angle and fixing it during work are all achieved through the rotating shaft.

[0003] During the process of opening and closing the device, it is a very important user experience to be able to open the device with one hand. Taking a notebook computer as an example, the lighter the screen component, the easier it is to open the device with one hand, and vice versa. The lighter the host component, the more difficult it is to open the device with one hand, and vice versa.

[0004] However, the weight of the screen component of the current notebook computer has become heavier and the weight of the host component has become lighter, resulting in the problem of "heavy head and light feet", making it more difficult to open the device with one hand. Summary of the Invention

[0005] The present application provides a rotating shaft mechanism and a device with opening and closing performance. Through the cooperation between the swing arm, the roller and the variable torsion structure of the rotating shaft mechanism, differential torsion can be provided for the device configured with this rotating shaft mechanism, that is, when the device is opened, the rotating shaft mechanism can provide a smaller torsion, and when the device is closed, the rotating shaft mechanism can provide a larger torsion to achieve one-handed opening and closing of the device and improve the user experience.

[0006] In a first aspect, a rotating shaft mechanism is provided for connecting a first body and a second body of a device, characterized in that it includes: a bracket, a swing arm, a roller and a rotating shaft;

[0007] The rotating shaft can be fixedly connected to the first body and includes a constant torsion structure and a variable torsion structure;

[0008] The bracket can be fixedly connected to the second body, sleeved on the constant torsion structure and connected to the swing arm;

[0009] The swing arm is provided with a roller bin with an opening facing the rotating shaft and accommodating the roller. The roller is respectively rotationally connected to the variable torsion structure and the roller bin. When the rotating shaft rotates in a first direction, the rotating shaft can drive the roller to rotate towards the top end of the roller bin. When the rotating shaft rotates in a second direction opposite to the first direction, the rotating shaft can drive the roller to rotate towards the bottom end of the roller bin, where

[0010] The inner wall of the roller bin includes a guiding inclined surface. In the extending direction from the bottom end to the top end, the guiding inclined surface inclines away from the rotating shaft, so that at the same rotation angle, when the roller is located at the bottom end, a greater damping force is generated between the roller and the variable torsion structure than when the roller is located at the top end.

[0011] The first direction is the opening direction of the device, and the second direction is the closing direction of the device. Exemplarily, the first direction is the clockwise direction and the second direction is the counterclockwise direction.

[0012] It should be understood that when the device configured with the rotating shaft mechanism is in the open state, the roller is located at the top end of the roller bin, and the top end of the roller bin represents an extreme position of the roller on the roller bin; when the device is in the closed state, the roller is located at the bottom end of the roller bin, and the bottom end of the roller bin represents another extreme position of the roller on the roller bin.

[0013] In the extending direction from the bottom end to the top end, the guiding inclined surface inclines away from the rotating shaft, which means that the bottom end of the guiding inclined surface is closer to the rotating shaft than the top end of the guiding inclined surface. The top end of the guiding inclined surface is close to the top end of the roller bin, and the bottom end of the guiding inclined surface is close to the bottom end of the roller bin.

[0014] The rotating shaft mechanism provided by the present application can provide two kinds of torques. One is the constant torque provided by the cooperation between the bracket and the constant torque structure of the rotating shaft, and the other is the variable torque provided by the cooperation between the swing arm, the roller and the variable torque structure of the rotating shaft. Moreover, the roller bin of the swing arm has a guiding inclined surface. In the extending direction from the bottom end to the top end of the roller bin, the guiding inclined surface inclines away from the rotating shaft. Due to the inclined surface design of the guiding inclined surface, when the rotating shaft rotates at the same angle, when the roller is located at the bottom end of the roller bin compared with when it is located at the top end of the roller bin, a greater extrusion force is generated between the roller and the variable torque structure to generate a greater damping force. In this way, a greater torque can be provided for the variable torque structure, and thus, a greater torque can be provided for the rotating shaft, so that the rotating shaft has different torques in the same angle and opposite rotation directions, so that the device configured with the rotating shaft mechanism has the characteristic of easy opening and difficult closing, realizing the single - hand opening and closing of the device.

[0015] Combined with the first aspect, in some implementation manners of the first aspect, the swing arm is rotatably connected to the bracket, and the swing arm can rotate around the axial direction of the rotating shaft; and,

[0016] The rotating shaft mechanism further includes an elastic member, one end of the elastic member is fixed on the bracket and the other end abuts against the swing arm.

[0017] The rotating shaft mechanism provided by the present application, due to the design of the guiding inclined surface, when the roller rotates towards the bottom end of the roller bin, it may cause jamming between the roller and the variable torque structure (or the rotating shaft). The rotational connection between the swing arm and the bracket can effectively avoid jamming between the roller and the variable torque structure. The elastic member can provide a pre-pressure for the swing arm. Moreover, when the swing arm rotates away from the rotating shaft, the compressed elastic member presses the roller tightly against the variable torque structure, so as to generate a large extrusion force (damping force) between the roller and the variable torque structure. Thus, a large torque is provided for the rotating shaft, so that the rotating shaft has different torques at the same angle and opposite rotation directions, so that the device configured with the rotating shaft mechanism has the characteristic of light opening and heavy closing. In combination with the first aspect, in some implementation manners of the first aspect, the variable torque structure includes a plurality of connected variable torque regions surrounding the axial direction of the rotating shaft. Along the first direction, the damping force between the roller and the plurality of variable torque regions gradually increases.

[0018] For the rotating shaft mechanism provided by the present application, the variable torque structure includes a plurality of variable torque regions, and along the first direction, the damping force between the roller and the plurality of variable torque regions gradually increases, which can make the damping force of the device gradually increase during the opening process. That is, when the device is just opened, the rotating shaft mechanism can provide a smaller damping force, so that the user can open the device with a smaller force. As the opening angle increases, the damping force gradually increases. When the device is opened to an angle in a normal use state, the larger damping force can balance the self-gravity of the first body to enhance the stability of the first body. Especially when the first body has a touch-functional screen, the larger damping force can also balance the clicking force of the user clicking on the screen to enhance the stability of the screen of the first body when it is clicked. In short, it can enhance the stability of the device during use.

[0019] In combination with the first aspect, in some implementation manners of the first aspect, along the first direction, the radii of the plurality of variable torque regions gradually increase.

[0020] For the rotating shaft mechanism provided by the present application, by providing a plurality of variable torque regions with variable diameters, along the first direction, the extrusion force between the roller and the plurality of variable torque regions gradually increases to provide a gradually increasing damping force.

[0021] In combination with the first aspect, in some implementation manners of the first aspect, there is a clearance fit between the variable torque region with the smallest radius among the plurality of variable torque regions and the roller.

[0022] The rotating shaft mechanism provided by the present application designs the cooperation between the variable torque area with the smallest radius and the roller as an intermittent fit, so that the damping force between the variable torque area with the smallest radius and the roller is basically 0, and the torque of the entire rotating shaft is minimized, and only provided by a constant torque. In this way, on the one hand, during the process of initially opening the device, the intermittent fit between the roller and the variable torque area facilitates the user to open the device with one hand. On the other hand, during the process of nearly closing the device, the intermittent fit between the roller and the variable torque area facilitates closing the device and reducing the residual torque.

[0023] In combination with the first aspect, in some implementation manners of the first aspect, the multiple variable torque areas include three variable torque areas, arranged in ascending order of radius. The central angle of the first variable torque area is between 0 degrees and 15 degrees, the central angle of the second variable torque area is between 15 degrees and 90 degrees, and the central angle of the third variable torque area is between 90 degrees and 135 degrees.

[0024] In combination with the first aspect, in some implementation manners of the first aspect, an arm limiting structure is provided on the bracket on the side of the swing arm close to the rotating shaft to limit the displacement of the swing arm rotating towards the rotating shaft.

[0025] The rotating shaft mechanism provided by the present application can avoid jamming between the swing arm and the rotating shaft due to excessive rotation of the swing arm by providing an arm limiting structure on the bracket for limiting the displacement of the swing arm rotating towards the rotating shaft. In addition, in a structure where the variable torque structure includes multiple variable torque areas, when the variable torque area with the smallest radius (for example, the first variable torque area) and the roller are in intermittent fit, under the action of the elastic member, by limiting the position of the swing arm through the arm limiting structure, the intermittent fit between the roller and this variable torque area can be better achieved.

[0026] In combination with the first aspect, in some implementation manners of the first aspect, a bushing sleeved on the constant torque structure is provided on the bracket, and the arm limiting structure is provided at the end of the bushing.

[0027] In combination with the first aspect, in some implementation manners of the first aspect, the guiding inclined surface is an arc surface.

[0028] The rotating shaft mechanism provided by the present application can increase the contact area between the guiding inclined surface and the cylindrical surface of the roller by setting the guiding inclined surface as an arc surface, which can increase the friction force and reduce wear.

[0029] In combination with the first aspect, in some implementation manners of the first aspect, the inner wall of the roller bin further includes a top arc surface and a bottom arc surface connecting the guiding inclined surface.

[0030] The rotating shaft mechanism provided by the present application, by providing a top arc surface and a bottom arc surface connected to the guiding inclined surface, can achieve a good fit between the roller and the roller bin during the rotation of the roller relative to the roller bin, so that the roller can rotate well on the roller bin.

[0031] In combination with the first aspect, in some implementation manners of the first aspect, the radii of the top arc surface and the bottom arc surface are the same.

[0032] In combination with the first aspect, in some implementation manners of the first aspect, the radii of the top arc surface and the bottom arc surface are greater than the radius of the roller.

[0033] The rotating shaft structure provided by the present application, by providing that the radii of the top arc surface and the bottom arc surface are greater than the radius of the roller, can achieve surface contact between the roller and the roller bin, so as to achieve stable contact between the roller and the roller bin, and can reduce the friction between the roller and the roller bin to reduce wear and improve the service life of the rotating shaft mechanism.

[0034] In combination with the first aspect, in some implementation manners of the first aspect, the radius of the variable torsion structure is less than or equal to the radius of the constant torsion structure.

[0035] The rotating shaft mechanism provided by the present application, by providing that the radius of the variable torsion structure is less than or equal to the radius of the constant torsion structure, is convenient for the assembly between the rotating shaft and the bracket in the structure where the variable torsion structure is arranged between the constant torsion radii.

[0036] In a second aspect, there is provided a device with opening and closing performance, including a first body, a second body, and a rotating shaft mechanism according to any aspect of the first aspect above, wherein the first body is rotationally connected to the rotating shaft of the rotating shaft mechanism, and the second body is connected to the bracket of the rotating shaft mechanism.

[0037] In combination with the second aspect, in some implementation manners of the second aspect, the device is a laptop computer, the first body is a screen assembly, and the second body is a host assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic exploded view of the laptop computer provided by the present application.

[0039] Figure 2 is a schematic assembly view of the laptop computer provided by the present application.

[0040] Figure 3 is a schematic assembly view of the rotating shaft mechanism provided by the present application.

[0041] Figure 4 is a schematic exploded view of the rotating shaft mechanism provided by the present application.

[0042] Figure 5 It is a schematic structural diagram of the bracket provided by this application.

[0043] Figure 6 It is a schematic structural diagram of the rotating shaft provided by this application.

[0044] Figure 7 It is a schematic structural diagram of the swing arm mechanism provided by this application.

[0045] Figure 8 It is another schematic sectional view of the rotating shaft mechanism provided by this application.

[0046] Figure 9 It is a schematic sectional view of the swing arm provided by this application.

[0047] Figure 10 It is a schematic diagram of the relationship between the roller and the rotating shaft provided by this application.

[0048] Figure 11 It is another schematic sectional view of the swing arm provided by this application.

[0049] Figure 12 It is a schematic sectional view of the variable torque structure provided by this application.

[0050] Figures 13 to 15 It is a schematic sectional view of different states of the cooperation between the rotating shaft and the swing arm mechanism during the opening process of the device provided by this application.

[0051] Figures 16 to 18 It is a schematic sectional view of different states of the cooperation between the rotating shaft and the swing arm mechanism during the closing process of the device provided by this application.

[0052] Figure 19 It is another schematic assembly diagram of the rotating shaft mechanism provided by the application.

[0053] Figure 20 It is another exemplary sectional view of the rotating shaft mechanism provided by this application.

[0054] Figure 21 It is another schematic assembly diagram of the rotating shaft mechanism provided by this application.

[0055] Description of Reference Numerals

[0056] Electronic device 10, rotating shaft mechanism 100, screen assembly 200, host assembly 300.

[0057] Rotating shaft 110, constant torque structure 111, variable torque structure 112, first variable torque area 1121, second variable torque area 1122, third variable torque area 1123, fixed structure 113, stop structure 114.

[0058] Bracket 120, bushing 121, gap 122 between bushings, support plate 123, fastening hole 1231 on support plate 123, swing arm connection structure 124, movable hole 1241 on swing arm connection structure 124, swing arm limiting structure 125, notch 126.

[0059] Swing arm mechanism 130, swing arm 131, through hole 1311, roller bin 1312, top end 1312-1 of roller bin 1312, bottom end 1312-2 of roller bin 1312, guiding inclined surface 1312A of roller bin 1312, top end 1312A-1 of guiding inclined surface 1312A, bottom end 1312A-2 of guiding inclined surface 1312A, top arc surface 1312B, bottom arc surface 1312C, blind hole 1313, roller 132, elastic member 133, movable member 1301. Detailed implementation manners

[0060] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0061] The rotating shaft mechanism of the present application can be applied to any device with an opening and closing function. Exemplarily, the device can be a laptop computer, a foldable mobile phone, etc.

[0062] For the convenience of describing the application scenario of the rotating shaft mechanism, taking a laptop computer as an example, a simple description of the application of the rotating shaft mechanism in the device is given.

[0063] Figure 1 is a schematic exploded view of the laptop computer provided by the present application, Figure 2 is a schematic assembly view of the laptop computer provided by the present application.

[0064] Refer to Figure 1 and Figure 2 , the laptop computer 10 includes a rotating shaft mechanism 100, a screen assembly 200 and a host assembly 300. The screen assembly 200 and the host assembly 300 are rotationally connected through the rotating shaft mechanism 100. Specifically, one end of the rotating shaft mechanism 100 is fixedly connected to the screen assembly 200, and the other end is fixedly connected to the host assembly 300. When the laptop computer 10 is opened, the screen assembly 200 rotates relative to the host assembly 300 in the clockwise direction, and the torque provided by the rotating shaft mechanism 100 keeps the laptop computer 10 in a stable open state. When the laptop computer 10 is closed, the screen assembly 200 rotates relative to the host assembly 300 in the counterclockwise direction, and the torque provided by the rotating shaft mechanism 100 makes the screen assembly 200 fall freely.

[0065] It can be understood that the device provided by the present application can be provided with one or more rotating shaft mechanisms, and the present application makes no limitation. For example, one, two, three or more rotating shaft mechanisms can be provided in the device. Exemplarily, Figure 1The laptop 10 shown is provided with two hinge mechanisms 100. For example, along the axial direction of the hinge mechanism 100, the two hinge mechanisms 100 are symmetrically arranged.

[0066] The torsion of the hinge mechanism 100 is provided by the damping force (or frictional force). During the opening process of the laptop 10, the smaller the damping force, the better. During the closing process of the laptop 10, in order to prevent the laptop 10 from being automatically closed under the gravity of the screen assembly and causing damage to the device, a larger damping force needs to be provided by the hinge mechanism 100 to balance the gravity of the screen assembly 200.

[0067] Therefore, in principle, the lighter the screen assembly 200, the smaller the damping force generated by the hinge mechanism 100, which means the smaller the force that the user can apply, and the easier it is to open the device with one hand. On the contrary, it is more difficult to open with one hand. From another perspective, the lighter the host assembly 300, the larger the damping force generated by the hinge mechanism 100, and it is easier to lift the host assembly 300 during the opening process of the laptop, and it is more difficult to open with one hand. On the contrary, it is easier to open with one hand.

[0068] Under the current trend of lightweight and touchscreen of laptops, the weight of the screen assembly becomes heavier and the weight of the host assembly becomes lighter, resulting in the problem of "heavy head and light feet". If the existing hinge mechanism with a constant torsion is still used, in order to realize the opening and closing functions of the laptop, the constant torsion provided by the hinge mechanism will inevitably be larger. In this case, the host assembly will inevitably be lifted during the opening process of the laptop, and it is very difficult to open the laptop with one hand.

[0069] Based on this, the present application provides a hinge mechanism that can provide differential torsion for the opening and closing (abbreviation: "opening and closing") of a device (such as a laptop) configured with this hinge mechanism, so that the device has the characteristic of light opening and heavy closing. The "light opening and heavy closing" of the device means that when the device is opened, the hinge mechanism provides low torsion to realize the one-handed opening of the device, and when the device is closed, the hinge mechanism provides a larger torsion so that a part of the device (such as the screen assembly) can freely cover another part (such as the host assembly).

[0070] Simply speaking, the hinge mechanism of the present application can provide two kinds of torsion, one is constant torsion and the other is variable torsion. The two kinds of torsion are reasonably combined to realize the opening and closing of the device. During the opening process of the device, the variable torsion is smaller, and during the closing process of the device, the variable torsion becomes larger. The constant torsion remains unchanged in the two processes, thereby realizing the one-handed opening and closing of the device.

[0071] In addition, the present application also provides a device with opening and closing performance. The device is configured with the above-mentioned rotating shaft mechanism, which rotatably connects two parts of the device to achieve one-handed opening and closing of the device.

[0072] For the convenience of description, the present application defines two parts of the device that can be opened and closed, namely a first body and a second body. The first body can be a component connected to the rotating shaft in the rotating shaft mechanism, and the second body is a component connected to the bracket in the rotating shaft mechanism. When the first body is opened, it can drive the relative rotation of the rotating shaft and the bracket, so that the first body and the second body rotate relative to each other. Taking a notebook computer as an example, the first body can be a screen assembly, and the second body can be a host assembly.

[0073] In addition, the present application also defines two rotation directions, namely a first direction and a second direction. The first direction is the opening direction of the device. When the device is opened, the rotating shaft of the rotating shaft mechanism rotates around the first direction. The second direction is the closing direction of the device. When the device is closed, the rotating shaft of the rotating shaft mechanism rotates around the second direction, and the second direction is opposite to the first direction. Exemplarily, the first direction is the clockwise direction, and the second direction is the counterclockwise direction.

[0074] Hereinafter, Figures 3 to 21 , a detailed description of the rotating shaft mechanism of the present application will be given.

[0075] Figure 3 is a schematic assembly diagram of the rotating shaft mechanism provided by the present application. Figure 4 is a schematic exploded view of the rotating shaft mechanism provided by the present application. Figure 5 is a schematic structural diagram of the bracket provided by the present application. Figure 6 is a schematic structural diagram of the rotating shaft provided by the present application. Figure 7 is a schematic structural diagram of the swing arm mechanism provided by the present application. Figure 8 is a schematic cross-sectional view of the rotating shaft mechanism provided by the present application.

[0076] Referring to Figure 3 and Figure 4, the rotating shaft mechanism 100 includes a rotating shaft 110, a bracket 120, and a swing arm mechanism 130. The swing arm mechanism 130 includes a swing arm 131 and a roller 132 accommodated in the swing arm 131. The rotating shaft 110 can be fixedly connected to the first body of the device (e.g., the screen assembly), and the bracket 120 can be fixedly connected to the second body of the device (e.g., the host assembly) to achieve the rotational connection between the first body and the second body and realize the opening and closing of the device. Among them, the bracket 120 is respectively connected to the swing arm 131 and the rotating shaft 110. The swing arm 131 is disposed adjacent and matched with the rotating shaft 110. The roller 132 is rotatably connected to both the swing arm 131 and the rotating shaft 110. When the rotating shaft 110 rotates, it can drive the roller 132 to rotate on the swing arm 131. The damping force generated by the relative rotation between the rotating shaft 110 and the bracket 120 is used to provide a constant torque, and the damping force generated by the relative rotation between the rotating shaft 110 and the roller 132 is used to provide a variable torque.

[0077] Reference Figure 3 , Figure 4 and Figure 5 , the bracket 120 includes a support plate 123, which can be fixedly connected to the second body of the device. Exemplarily, a plurality of fastening holes 1231 are provided on the support plate 123, and fasteners (e.g., bolts or screws, etc.) can pass through the fastening holes 1231 to fix the support plate 123 on the second body, so as to fixedly connect the bracket 120 and the second body. Reference Figure 3 , Figure 4 and Figure 6 , the end of the rotating shaft 110 is provided with a fixed structure 113, which can be inserted into the first body of the device to achieve the fixed connection between the rotating shaft 110 and the first body. Exemplarily, anti-slip patterns are provided on the outer surface of the fixed structure 113 to better fix the rotating shaft 110 on the first body.

[0078] Continue to refer to Figure 5 , the bracket 120 includes a bushing 121, and the bushing 121 has a through hole for sleeving the rotating shaft 110. Continue to refer to Figure 6 , the rotating shaft 110 includes a constant torque structure 111 corresponding to the bushing 121, and the bushing 121 and the constant torque structure 111 cooperate to provide a constant torque. Refer to together Figure 3 , the bushing 121 is sleeved on the constant torque structure 111 and serves as a support structure for the rotation of the rotating shaft 110. An interference fit is adopted between the constant torque structure 111 and the bushing 121. When the device is opened or closed, the rotating shaft 110 rotates relative to the bracket 120, and the frictional fit between the bushing 121 and the constant torque structure 111 can provide a constant damping force to provide a constant torque. Moreover, when the device is in use, the damping force between the bushing 121 and the constant torque structure 111 can also make the first body in a relatively stable state.

[0079] It can be understood that the present application does not impose any limitation on the number of the bushings 121, and the bracket 120 may include one, two, three, four or more bushings 121. When the bracket 120 includes a plurality of bushings 121, the plurality of bushings 121 are coaxial and spaced apart to facilitate the rotation shaft 110 to pass through the plurality of bushings 121. Exemplarily, Figure 5 two bushings 121 are shown. Correspondingly, the present application also does not impose any limitation on the number of the constant torque structures 111, and the number of the constant torque structures 111 is the same as the number of the bushings 121.

[0080] Continuing to refer to Figure 5 , the bracket 120 further includes a swing arm connection structure 124. The swing arm connection structure 124 has a receiving cavity with an opening facing the rotation shaft 110 to receive the swing arm 131 and connect the swing arm 131 to the bracket 120. Exemplarily, the swing arm connection structure 124 may be provided on the support plate 123 of the bracket 120. Exemplarily, the swing arm connection structure 124 may be provided between two adjacent bushings 121 and fixedly connected to the two bushings 121 respectively.

[0081] In some embodiments, the swing arm 131 is rotatably connected to the bracket 120, and the swing arm 131 can rotate around the axial direction of the rotation shaft 110 towards or away from the rotation shaft 110. Referring together to Figure 5 , Figure 7 and Figure 8 . Exemplarily, along the axial direction of the rotation shaft 110, two movable holes 1241 (as shown in Figure 5 ) are provided on opposite sides of the swing arm connection structure 124, and, along the axial direction of the rotation shaft 110, a through hole 1311 (as shown in Figure 7 ) is provided on the swing arm 131. The movable member 1301 sequentially passes through one movable hole 1241 of the swing arm connection structure 124, the through hole 1311 of the swing arm 131, and the other movable hole 1241 of the swing arm connection structure 124 (as shown in Figure 8 ) to realize the rotational connection between the swing arm 131 and the bracket 120. Exemplarily, the movable member 1301 may be a movable component similar to a shaft pin.

[0082] Referring together to Figure 5 , Figure 6 and Figure 8 , there is a gap 122 between the two bushings 121 of the bracket 120 (as shown in Figure 5As shown, the gap 122 communicates with the receiving cavity of the swing arm connection structure 124. The constant torque structure 111 of the rotating shaft 110 cooperates with the shaft sleeve 121. A part of the rotating shaft 110 is exposed in the gap 122, and this part can cooperate with the roller 132 to provide variable torque. For ease of description, this part of the region is denoted as the variable torque structure 112 of the rotating shaft 110. In some embodiments, a variable torque structure 112 located in the gap 122 is provided between the two constant torque structures 111 of the rotating shaft 110 (as Figure 6 shown), and the variable torque structure 112 cooperates with the roller 132 (as Figure 8 shown) to provide variable torque for the rotating shaft mechanism.

[0083] Hereinafter, in combination with Figures 7 to 11 , the swing arm mechanism 130, the variable torque structure 112, and related components will be described in detail to illustrate the principle and process by which the rotating shaft mechanism can provide different torques.

[0084] Referring to Figure 7 and Figure 8 , a roller bin 1312 with an opening facing the rotating shaft 110 is provided on the swing arm 131. The roller bin 1312 is generally in a U-shaped structure, and the roller 132 is accommodated in the roller bin 1312. The roller 132 is rotatably connected to the roller bin 1312, and the roller 132 is also rotatably connected to the rotating shaft 110. When the device is opened, the rotating shaft 110 rotates in the first direction, which can drive the roller 132 to rotate towards the top 1312-1 of the roller bin 1312. When the device is closed, the rotating shaft 110 rotates in the second direction, which can drive the roller 132 to rotate towards the bottom 1312-2 of the roller bin 1312. It should be understood that when the device is in the open state, the roller 132 is located at the top 1312-1 of the roller bin 1312, and the top 1312-1 of the roller bin 1312 represents an extreme position of the roller 132 on the roller bin 1312; when the device is in the closed state, the roller 132 is located at the bottom 1312-2 of the roller bin 1312, and the bottom 1312-2 of the roller bin 1312 represents another extreme position of the roller 132 on the roller bin 1312.

[0085] In some embodiments, the inner wall of the roller bin 1312 includes a guiding inclined surface. In the extending direction from the bottom 1312-2 to the top 1312-1 of the roller bin 1312, the guiding inclined surface inclines away from the rotating shaft 110. This design can enable the rotating shaft to have different torques in the same angle and opposite rotating directions, so that the device configured with the rotating shaft mechanism has the characteristic of being easy to open and difficult to close.

[0086] Figure 9 is a schematic structural diagram of the swing arm provided by the present application, Figure 10 is a schematic diagram of the relationship between the roller and the rotating shaft provided by the present application.

[0087] Refer to together Figure 9 , in the extending direction from the bottom end 1312-2 of the roller bin 1312 to the top end 1312-1 of the roller bin 1312, the guiding inclined surface 1312A inclines away from the rotating shaft, or rather, the bottom end 1312A-2 of the guiding inclined surface 1312A is closer to the rotating shaft 110 than the top end 1312A-1 of the guiding inclined surface 1312A. The bottom end 1312A-2 of the guiding inclined surface 1312A is close to the bottom end 1312-2 of the roller bin 1312, and the top end 1312A-1 of the guiding inclined surface 1312A is close to the top end 1312-1 of the roller bin 1312. Assume that Figure 9 the dash-dotted line in represents the position where the axis of the rotating shaft 110 is located. The distance L2 between the bottom end 1312A-2 of the guiding inclined surface 1312A and the axis of the rotating shaft 110 is less than the distance L1 between the top end 1312A-1 of the guiding inclined surface 1312A and the axis of the rotating shaft 110. In this way, due to the inclined surface design of the guiding inclined surface 1312A, when the rotating shaft rotates by the same angle, when the roller 132 rotates towards the bottom end 1312-2 of the roller bin 1312 as compared with when the roller 132 rotates towards the top end 1312-1 of the roller bin 1312, a greater squeezing force can be generated between the roller 132 and the variable torsion structure 112 to generate a greater damping force. Or, when the rotating shaft rotates by the same angle, when the roller 132 is located at the bottom end 1312-2 of the roller bin 1312 as compared with when it is located at the top end 1312-1 of the roller bin 1312, a greater squeezing force can be generated between the roller 132 and the variable torsion structure 112 to generate a greater damping force. In this way, a greater torsion can be provided for the variable torsion structure 112, and thus, a greater torsion can be provided for the rotating shaft 110, so that the rotating shaft 110 has different torsions in the same angle and opposite rotating directions, so that the device configured with the rotating shaft mechanism has the characteristic of light opening and heavy closing.

[0088] Refer to together Figure 10, To analyze the cooperation between the roller 132 and the variable torque structure 112, assuming that the swing arm 131 is stationary, when the roller 132 is at the top 1312-1 of the roller bin 1312, the distance between the roller 132 and the variable torque structure 112 of the rotating shaft 110 is C2'. C2' can be approximated as 0 or a negative number. When C2' is a negative number, interference occurs between the roller 132 and the variable torque structure 112 of the rotating shaft 110. C2' can be understood as the interference amount. When the roller 132 is at the bottom 1312-2 of the roller bin 1312, an interference amount occurs between the roller 132 and the variable torque structure 112, denoted as C2. It can be seen that when the swing arm 131 is stationary, due to the inclined surface design of the guiding inclined surface 1312A, when the roller 132 rotates from the bottom 1312-2 of the roller bin 1312 to the top 1312-1 of the roller bin 1312, the distance between the roller 132 and the variable torque structure 112 (or the rotating shaft 110) becomes smaller and smaller, meaning that the extrusion force between the roller 132 and the variable torque structure 112 becomes smaller and smaller, and the damping force between the two becomes smaller and smaller. On the contrary, when the roller 132 rotates from the top 1312-1 of the roller bin 1312 to the bottom 1312-2 of the roller bin 1312, the distance between the roller 132 and the variable torque structure 112 (or the rotating shaft 110) becomes smaller and smaller, and an interference amount appears, meaning that the extrusion force between the roller 132 and the variable torque structure 112 becomes larger and larger, and the damping force between the two becomes larger and larger.

[0089] From the above analysis, it can be seen that due to the inclined surface design of the guiding inclined surface 1312A, especially when the roller 132 rotates towards the bottom 1312-2 of the roller bin 1312, it may cause jamming between the roller 132 and the rotating shaft 110 (or the variable torque structure 112). Therefore, in some embodiments, the swing arm 131 and the bracket 120 can be designed to be rotatably connected, and there is a gap between the swing arm 131 and the swing arm connection structure 124 of the bracket 120 to reserve a displacement amount for the swing arm 131 to rotate in a direction away from the rotating shaft 110. In this embodiment, when the roller 132 rotates towards the bottom 1312-2 of the roller bin 1312, the interference amount between the roller 132 and the variable torque structure 112 may be very small or none, converting the interference amount between the two into the displacement of the swing arm 131, and the swing arm 131 can move in a direction away from the rotating shaft 110, avoiding jamming between the roller 132 and the rotating shaft 110.

[0090] During the rotation of the swing arm 131, in order to provide sufficient extrusion force to the variable torsion structure 112 to provide sufficient damping force, the swing arm mechanism 130 may further include an elastic member to provide a pre-pressure to the swing arm 131, so that the elastic member provides an extrusion force to the roller 132 and the variable torsion structure 112 through the swing arm 131. Moreover, when the swing arm 131 rotates in a direction away from the rotating shaft 110, the roller 132 can be pressed tightly against the variable torsion structure 112 through the elastic member, so as to generate a large extrusion force between the roller 132 and the variable torsion structure 112 to generate a large damping force, thereby providing a large torsion force to the rotating shaft 110.

[0091] Continuing to refer to Figure 7 and Figure 8 As shown in FIG., the swing arm mechanism 130 includes an elastic member 133. One end of the elastic member 133 is fixed on the bracket 120 and the other end abuts against the swing arm 131 to realize the compression and elongation of the elastic member 133. Exemplarily, one end of the elastic member 133 is fixed on the swing arm connection structure 124 of the bracket 120. Exemplarily, a blind hole 1313 (as shown in Figure 7 FIG.) is provided on the swing arm 131. The elastic member 133 extends into the blind hole 1313, and the other end of the elastic member 133 abuts against the bottom wall of the blind hole 1313. When the device is opened, the rotating shaft 110 rotates in the first direction, the roller 132 rotates towards the top 1312-1 of the roller bin 1312, the swing arm 131 may or may not rotate, and the extrusion force (or damping force) between the roller 132 and the variable torsion structure 112 is small or almost zero, providing a small or almost zero torsion force to the variable torsion structure 112. When the device is closed, the rotating shaft 110 rotates in the second direction, the roller 132 rotates towards the bottom 1312-2 of the roller bin 1312. Under the action of the guiding inclined surface 1312A, the swing arm 131 can rotate in a direction away from the rotating shaft 110, the elastic member 133 is compressed, and the elastic force of the elastic member 133 is transmitted to the roller 132, so that a large extrusion force (or damping force) is generated between the roller 132 and the variable torsion structure 112, thereby providing a large torsion force to the variable torsion structure 112.

[0092] Exemplarily, the elastic member 133 can be an elastic component such as a compression spring or a rubber spring.

[0093] In summary, it can be seen that in the embodiment where the swing arm 131 is rotatably connected to the bracket 120, under the action of the inclined surface design of the guiding inclined surface 1312A, when the roller 132 rotates towards the top end 1312-1 of the roller bin 1312, the swing arm 131 may or may not rotate, and the extrusion force (or damping force) between the roller 132 and the variable torsion structure 112 is small or almost zero, providing a small or almost zero torsion for the variable torsion structure 112. When the roller 132 rotates towards the bottom end 1312-2 of the roller bin 1312, the swing arm 131 may rotate in a direction away from the rotating shaft 110, and the compressed elastic member 133 transmits the elastic force to the roller 132, so that a greater extrusion force (or damping force) can be generated between the roller 132 and the variable torsion structure 112, providing a greater torsion for the variable torsion structure 112. Thus, a greater torsion is provided for the rotating shaft 110, such that the rotating shaft 110 has differential torques in the same angle and opposite rotation directions, so that the device configured with the rotating shaft mechanism has the characteristic of easy opening and heavy closing.

[0094] It should be noted that the guiding inclined surface 1312A of the roller bin 1312 can be a surface of any shape, and the present application does not make any limitation, as long as it satisfies that the guiding inclined surface 1312A inclines in a direction away from the rotating shaft 110 in the extending direction from the bottom end 1312-2 to the top end 1312-1 of the roller bin 1312.

[0095] In some embodiments, continuing to refer to Figure 9 , the guiding inclined surface 1312A is an arc surface. In this way, the arc-shaped guiding inclined surface 1312A can increase the contact area between the guiding inclined surface 1312A and the cylindrical surface of the roller 132, increasing the friction force and reducing wear. In other embodiments, referring to Figure 11 , Figure 11 is another schematic structural diagram of the swing arm provided by the present application, and the guiding inclined surface 1312A is a straight surface. In this way, the straight guiding inclined surface 1312A can enable the roller 132 to roll up and down smoothly, and moreover, the torque change during the rolling process of the roller 132 also tends to change linearly.

[0096] It can be understood that, continuing to refer to Figure 9 , the inner wall of the roller bin 1312 can be composed of three wall surfaces, the guiding inclined surface 1312A in the middle and the wall surfaces connecting the two ends of the guiding inclined surface 1312A. The wall surface at the top end 1312-1 of the roller bin 1312 is denoted as the top wall surface 1312B, and the wall surface at the bottom end 1312-2 of the roller bin 1312 is denoted as the bottom wall surface 1312C. Among them, the shapes of the top wall surface 1312B and the bottom wall surface 1312C can be in any form, and the present application does not make any limitation.

[0097] In some embodiments, continuing to refer toFigure 9 , the top wall surface 1312B of the roller bin 1312 is an arc surface, which can be called the top arc surface 1312B, and / or the bottom wall surface 1312B of the roller bin 1312 is an arc surface, which can be called the bottom arc surface 1312C. In this way, during the process of the roller 132 rotating relative to the roller bin 1312, due to the arc surface design of the top arc surface 1312B and / or the bottom arc surface 1312C, a better fit can be achieved between the roller 132 and the roller bin 1312, so that the roller 132 can rotate well on the roller bin 1312. Continue to refer to Figure 9 , in the embodiment where the roller bin 1312 has the top arc surface 1312B and the bottom arc surface 1312C, due to the inclined surface design of the guiding inclined surface 1312A, the distance between the center O2 of the bottom arc surface 1312C and the axis of the rotating shaft 110 is less than the distance between the center O1 of the top arc surface 1312B and the axis of the rotating shaft 110.

[0098] Exemplarily, the top arc surface 1312B and the bottom arc surface 1312C have the same radius.

[0099] Exemplarily, the radius of the top arc surface 1312B and the bottom arc surface 1312C is greater than or equal to the radius of the roller 132. In this way, surface contact between the roller 132 and the roller bin 1312 can be achieved, so as to achieve stable contact between the roller 132 and the roller bin 1312, and the friction between the roller 132 and the roller bin 1312 can be reduced to reduce wear and improve the service life of the rotating shaft mechanism.

[0100] In some other embodiments, the top wall surface of the roller bin 1312 can be a straight surface or other forms of wall surfaces (not shown in the figure), and the bottom wall surface of the roller bin 1312 can also be a straight surface or other forms of wall surfaces (not shown in the figure).

[0101] In the above embodiments, for the rotating shaft mechanism provided by the present application, through the cooperation between the swing arm mechanism 130 and the variable torque structure 112, the rotating shaft can have different torques in the same angle and opposite rotation directions, so that the device equipped with the rotating shaft mechanism has the characteristic of easy opening and heavy closing. In addition, we also hope that the device has the following characteristics: when the device is just opened, it is hoped that the rotating shaft 110 has a small damping force, so that the user can open the device with a small force. However, when the device is opened to a certain angle (for example, in the angle range of 90° to 135°) and is in a normal use state, it is hoped that the rotating shaft 110 has a large damping force to balance the self-gravity of the first body to enhance the stability of the first body. Especially when the first body has a touch screen, it is also necessary to balance the clicking force on the screen to enhance the stability of the first body when the screen is clicked. In short, it is necessary to enhance the stability of the device during use.

[0102] Based on the above requirements, the rotating shaft mechanism provided in this application can be provided with multiple connected variable torque regions on the variable torque structure 112. The multiple variable torque regions are arranged around the axial direction of the rotating shaft. The surfaces of the multiple variable torque regions are arc surfaces. The angles corresponding to the multiple variable torque regions are the angles by which the first body (or the rotating shaft 110) rotates when the device is opened or the angles that can be formed between the first body and the second body. For example, if the angles formed by the multiple variable torque regions are 0° to 135°, then the angle by which the first body (or the rotating shaft 110) can rotate or the angle between the first body and the second body is 0° to 135°. Along the opening direction of the device (i.e., the first direction), the damping force between the multiple variable torque regions and the roller 132 gradually increases, which can enhance the stability of the device when the device is in use. Among them, the damping force between the roller 132 and the multiple variable torque regions can increase from a first value to a second value, and the first value is greater than or equal to 0.

[0103] In some embodiments, along the opening direction of the device (i.e., the first direction), the multiple variable torque regions are multiple variable-diameter variable torque regions, that is, the radii of the multiple variable torque regions gradually increase. In this way, the damping force between the roller 132 and the multiple variable torque regions can be gradually increased.

[0104] The following Figures 12 to 18 is used to illustrate the multiple variable-diameter variable torque regions of the variable torque structure.

[0105] Figure 12 is a schematic structural diagram of the variable torque structure provided in this application. Referring to Figure 12 , exemplarily, the variable torque structure 112 includes three variable torque regions, namely: the first variable torque region 1121, the second variable torque region 1122, and the third variable torque region 1123. The first variable torque region 1121 is connected to the second variable torque region 1122, and the second variable torque region 1122 is connected to the third variable torque region 1123. Arranged in ascending order of radius, the radii of the first variable torque region 1121, the second variable torque region 1122, and the third variable torque region 1123 gradually increase, that is, the radius r1 of the first variable torque region 1121 is smaller than the radius r2 of the second variable torque region 1122, and the radius r2 of the second variable torque region 1122 is smaller than the radius r3 of the third variable torque region. The angles corresponding to the three variable torque regions are the angles by which the rotating shaft 110 rotates. That is, when the rotating shaft 110 rotates to the first variable torque region 1121, the angle by which the rotating shaft 110 rotates is the angle corresponding to the first variable torque region 1121. When the rotating shaft 110 rotates to the second variable torque region, the angle by which the rotating shaft 110 rotates is the angle corresponding to the second variable torque region 1122. When the rotating shaft 110 rotates to the third variable torque region 1123, the angle by which the rotating shaft 110 rotates is the angle corresponding to the third variable torque region 1123.

[0106] It can be understood that the angle of the third variable torsion area 1123 with the largest radius is an angle at which the device can be in a usable state. In other words, when the rotating shaft 110 rotates to the third variable torsion area 1123, the device can be in a stable usable state at any time.

[0107] When the device is turned on, the rotating shaft 110 rotates around the first direction (such as Figure 12 the clockwise direction shown), which can drive the roller 132 to rotate from the bottom end 1312-2 of the roller bin 1312 to the top end 1312-1 of the roller bin 1312. The roller 132 can cooperate with the first variable torsion area 1121, the second variable torsion area 1122, and the third variable torsion area 1123 in sequence. Since r1 is less than r2 and r2 is less than r3, during the process of turning on the device, the cooperation between the roller 132 and multiple variable torsion areas can gradually change from intermittent cooperation to extrusion contact, or the cooperation between the roller 132 and multiple variable torsion areas can also always be extrusion contact. However, regardless of the form of cooperation between the roller 132 and multiple variable torsion areas, the extrusion force between the roller 132 and multiple variable torsion areas will gradually increase so that the damping force gradually increases. Thus, during the process of turning on the device, the rotating shaft 110 can provide a gradually increasing damping force. It should be understood that if there is a clearance fit between the roller 132 and a certain variable torsion area (for example, the first variable torsion area 1121), the extrusion force and damping force between the roller 132 and this variable torsion area can be ignored. When the roller 132 contacts the third variable torsion area 1123, the extrusion force between the roller 132 and the third variable torsion area 1123 is the largest and thus the damping force is the largest. Therefore, when the rotating shaft 110 rotates to the angle corresponding to the third variable torsion area 1123, the device can be in a stable usable state when the rotating shaft 110 stops rotating.

[0108] During the process of closing the device, the rotating shaft 110 rotates around the second direction (such as Figure 12 the counterclockwise direction shown), which can drive the roller 132 to rotate from the top end 1312-1 of the roller bin 1312 to the bottom end 1312-2 of the roller bin 1312. The roller 132 cooperates with the third variable torsion area 1123, the second variable torsion area 1122, and the first variable torsion area 1121 in sequence. Since r1 is less than r2 and r2 is less than r3, during the process of closing the device, the cooperation between the roller 132 and multiple variable torsion areas can gradually change from extrusion contact to intermittent cooperation, or the cooperation between the roller 132 and multiple variable torsion areas can also always be extrusion contact. However, regardless of the form of cooperation between the roller 132 and multiple variable torsion areas, the extrusion force between the roller 132 and multiple variable torsion areas gradually decreases so that the damping force gradually decreases. Thus, during the process of closing the device, the rotating shaft 110 can provide a gradually decreasing damping force.

[0109] It should be noted that due to the design of the guide slope 1312A of the roller housing 1312, even if the damping force of the rotating shaft 110 gradually decreases during the closing process of the device, within the same variable torque zone, as long as the roller 132 contacts the variable torque zone, the damping force in the variable torque zone during the closing process is greater than the damping force in the variable torque zone during the opening process. For example, when the rotating shaft 110 rotates to the third variable torque zone 1123, the roller 132 contacts the third variable torque zone 1123, and the damping force during the closing process is greater than the damping force during the opening process.

[0110] The multiple variable-torque zones of variable diameter set in the variable-torque structure described above can gradually increase the damping force of the device during the opening process. When the device is in use, the stability of the first body and the stability of the screen of the first body when being clicked can be enhanced to enhance the stability of the device. In addition, when the device is closed to a certain angle range (for example, 0° to 15°), we hope that the damping force of the rotating shaft 110 is very small or even 0, so as to facilitate the closing of the device and reduce the residual torque. Therefore, in the present application, the variable-torque zone can be reasonably designed so that the damping force of the variable-torque zone is very small or even 0 when the device is closed to a certain angle.

[0111] In embodiments where the variable torque structure includes multiple variable torque zones, the engagement between the variable torque zone with the smallest radius and the roller 132 can be intermittent. Due to the design of the guide ramp, the engagement between the variable torque zone with the smallest radius and the roller 132 is intermittent, regardless of whether the device is opening or closing. Thus, during the device opening process, the engagement between the roller 132 and the multiple variable torque zones gradually changes from intermittent engagement to extrusion contact, and the damping force of the variable torque zones gradually increases. During the device closing process, the engagement between the roller 132 and the multiple variable torque zones gradually changes from extrusion contact to intermittent engagement. Once the intermittent engagement between the roller 132 and the variable torque zone is achieved, the damping force between the roller 132 and the variable torque zone is very small or even zero, allowing the device to be easily closed.

[0112] In an embodiment where the variable torque structure includes the above-mentioned first variable torque zone 1121, the second variable torque zone 1122 and the third variable torque zone 1123, the first variable torque zone 1121 is a torque zone that intermittently cooperates with the roller 132, the third variable torque zone 1123 is a torque zone that is in extrusion contact with the roller 132, and is a torque zone in which the device can be in a stable use state, and the second variable torque zone 1122 is between the two.

[0113] Taking the starting angle of the first variable torque zone 1121 with the smallest radius as 0° as an example, illustratively, the central angle of the first variable torque zone is between 0° and 15°, the central angle of the second variable torque zone is between 15° and 90°, and the central angle of the third variable torque zone is between 90° and 135°.

[0114] It should be understood that although Figure 12 three variable-torque regions with different diameters are shown, the number of variable-torque regions of the rotating shaft mechanism of the present application is not limited. For example, the rotating shaft mechanism can adopt different numbers of variable-torque regions such as one, two, four, five, etc.

[0115] When the variable-torque structure includes multiple variable-torque regions, in addition to meeting the radius change requirements between the multiple variable-torque regions, exemplarily, the connection between adjacent variable-torque regions among the multiple variable-torque regions can be a smooth transition. Among them, the smooth transition means that the two variable-torque regions are tangent at the connection, or it can also be understood that the radian at the connection is the same, so that the roller 132 can achieve a smooth transition when transitioning from one variable-torque region to another variable-torque region, avoiding jamming between the two.

[0116] To facilitate the understanding of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the opening and closing processes of the above device, hereinafter, in combination with Figures 13 to 18 taking the variable-torque regions corresponding to the above three angles as an example, the opening and closing processes of the device will be described. Among them, Figures 13 to 15 is a schematic diagram of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the opening process of the device, Figures 16 to 18 is a schematic diagram of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the closing process of the device.

[0117] Figure 13 is a schematic diagram of state 1 of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the opening process of the device provided by the present application. Referring to Figure 13 when the device is opened, during the process of the rotating shaft 110 (or the first body) rotating around the first direction from 0° to 15°, the position of the first variable-torque region 1121 corresponds to the roller 132 of the swing arm mechanism 130. The radius r1 of the first variable-torque region 1121 is the smallest. The first variable-torque region 1121 and the roller 132 are in an intermittent fit. The roller 132 and the swing arm 131 are both stationary. There is no torque between the first variable-torque region 1121 and the roller 132. The torque F1 between the first variable-torque region 1121 and the roller 132 in this state is 0. Therefore, during this process, the torque of the rotating shaft 110 is only provided by the frictional fit between the constant-torque structure 111 and the bushing 121. The overall torque of the rotating shaft 110 is the smallest. Therefore, the user can open the device with a small force with one hand.

[0118] Figure 14 is a schematic diagram of state 2 of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the opening process of the device provided by the present application. Referring to Figure 14, the device remains open. During the process where the rotating shaft 110 (or the first body) rotates by 15° to 90° in the first direction, the position of the second variable torsion area 1122 corresponds to that of the roller 132. The radius r2 of the second variable torsion area 1122 is greater than the radius r1 of the first variable torsion area 1121. The second variable torsion area 1122 contacts the roller 132, and the second variable torsion area 1122 drives the roller 132 to rotate towards the top 1312-1 of the roller bin 1312 ( Figure 14 the upward arrow direction shown). However, the extrusion force between the second variable torsion area 1122 and the roller 132 is very small, and the torsion F2 between the second variable torsion area 1122 and the roller 132 is very small and can be almost ignored. Therefore, during this process, the overall torsion of the rotating shaft 110 is almost the same as that in state 1, and the overall torsion of the rotating shaft 110 is small. So, the user can continue to open the device with a small force using one hand. It can be understood that during this process, due to the very small extrusion force between the second variable torsion area 1122 and the roller 132, the swing arm 131 can be regarded as stationary, or even if the swing arm 131 rotates, it is a very small rotation and can be ignored.

[0119] Figure 15 is a schematic diagram of state 3 of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the opening process of the device provided in this application. Refer to Figure 15 , the device continues to be opened. During the process where the rotating shaft 110 (or the first body) rotates by 90° to 150° in the first direction, the position of the third variable torsion area 1123 corresponds to that of the roller 132. The radius r3 of the third variable torsion area 1123 is the largest. After the roller 132 rotates to the top 1312-1 of the roller bin 1312, it cannot continue to rotate upward. The third variable torsion area 1123 squeezes the roller 132 and drives the swing arm 131 to rotate away from the rotating shaft 110 (the first direction). The elastic member 133 is compressed. Under the action of the elastic member 133, the extrusion force between the third variable torsion area 1123 and the roller 132 becomes larger, and a larger torsion F3 is generated between the third variable torsion area 1123 and the roller 132. Therefore, during this process, the overall torsion of the rotating shaft 110 (the sum of the torsion between the roller 132 and the variable torsion structure 112 and the torsion between the shaft sleeve 121 and the constant torsion structure 111) becomes larger. Through this torsion, the stability of the first body at this angle and the stability when the screen of the first body is clicked can be enhanced.

[0120] Figure 16 is a schematic diagram of state 4 of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the closing process of the device provided in this application. To better understand the characteristic of the device being easy to open and difficult to close, the schematic diagram of state 3 shown in Figure 15 can be compared. Refer to Figure 16, the device is closed. During the process that the rotating shaft 110 (or the first body) rotates 90° to 150° around the second direction, the positions of the third variable torsion area 1123 and the roller 132 correspond. The third variable torsion area 1123 continues to contact the roller 132 and drives the roller 132 to rotate towards the bottom end 1312-2 of the roller bin 1312 ( Figure 16 the downward arrow direction in), due to the inclined surface design of the guiding inclined surface 1312A of the roller bin 1312, the third variable torsion area 1123 continues to squeeze the roller 1312 and drives the swing arm 131 to continue rotating in the direction away from the rotating shaft 110 (the first direction). In this state, the displacement of the swing arm 131 during rotation is greater than the displacement of the swing arm 131 in state 3. The elastic member 133 continues to be compressed. Under the action of the elastic member 133, the squeezing force between the third variable torsion area 1123 and the roller 132 is greater, and a greater torsion force F4 is generated between the third variable torsion area 1123 and the roller 132. Therefore, during this process, the overall torsion force of the rotating shaft 110 (the sum of the torsion force between the roller 132 and the variable torsion structure 112 and the torsion force between the shaft sleeve 121 and the constant torsion structure 111) is greater, and the stability of the first body at this angle and the stability when the screen of the first body is clicked can be enhanced through this torsion force.

[0121] Figure 17 is a schematic diagram of state 5 of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the closing process of the device provided by the present application. To better understand the characteristic of light opening and heavy closing of the device, comparison can be made with Figure 14 the schematic diagram of state 2 shown. Refer to Figure 17 , the device continues to be closed. During the process that the rotating shaft 110 (or the first body) rotates 15° to 90° around the second direction, the positions of the second variable torsion area 1122 and the roller 132 correspond. Since the radius r2 of the second variable torsion area 1122 is smaller than the radius r3 of the third variable torsion area 1123, compared with state 4, the swing arm 131 will rotate in the direction close to the rotating shaft 110 (the second direction), the distance between the swing arm 131 and the rotating shaft 110 becomes smaller, the compression amount of the elastic member 133 gradually becomes smaller, the squeezing force between the second variable torsion area 1122 and the roller 132 is smaller than that in state 4, and a smaller torsion force F5 is generated between the second variable torsion area 1122 and the roller 132. However, due to the inclined surface design of the guiding inclined surface 1312A, the torsion force F5 is still greater than the torsion force F2 in state 2. Therefore, during this process, the overall torsion force of the rotating shaft 110 (the sum of the torsion force between the roller 132 and the variable torsion structure 112 and the torsion force between the shaft sleeve 121 and the constant torsion structure 111) becomes smaller, but is still greater than the overall torsion force of the rotating shaft 110 in state 2, which can prevent the first body from being automatically closed under its own gravity to cause damage to the device.

[0122] Figure 18This is a schematic diagram of the state 6 of the cooperation between the rotating shaft 110 and the swing arm mechanism 130 during the closing process of the device provided in this application. For comparison Figure 13 The schematic of state 1 shown. Refer to Figure 18 , the device continues to be closed. During the process that the rotating shaft 110 (or the first body) rotates around the second direction by 0° to 15°, the position of the first variable torque area 1121 corresponds to that of the roller 132. Since the radius r1 of the first variable torque area 1121 is the smallest, the first variable torque area 1121 has a clearance fit with the roller 132. The roller 132 and the swing arm 131 are both stationary, and there is no torque between the first variable torque area 1121 and the roller 132. The torque F6 between the first variable torque area 1121 and the roller 132 in this state is 0. Therefore, during this process, the torque of the rotating shaft 110 is only provided by the frictional fit between the constant torque structure 111 and the bushing 121. The overall torque of the rotating shaft 110 is the smallest, which is beneficial to closing the device and reducing the residual torque.

[0123] Among the above 6 states, when the device is opened, the torque change of the cooperation between the swing arm mechanism 130 and the variable torque structure 112 is: F1 < F2 < F3. When the device is closed, the torque change of the cooperation between the swing arm mechanism 130 and the variable torque structure 112 is: F4 > F5 > F6, and F4 > F3, F5 > F2. Combining the characteristics of easy opening and difficult closing of the device described above, it can be further seen that at the same rotation angle (for example, the angle corresponding to the second variable torque area 1122 or the third variable torque area 1123), due to the design of the guiding inclined surface 1312A of the roller bin 1312, when the roller 132 is located at the top 1312-1 and the bottom 1312-2 of the roller bin 1312, different extrusion forces can be generated between the roller 132 and the variable torque structure 112 to generate different torques. When the roller 132 is located at the top 1312-1 of the roller bin 1312, the extrusion force between the roller 132 and the variable torque structure 112 is small, resulting in a small torque. When the roller 132 is located at the bottom 1312-2 of the roller bin 1312, the extrusion force between the roller 132 and the variable torque structure 112 is large, resulting in a large torque.

[0124] In summary, for the rotating shaft mechanism provided in this application, a constant torque can be provided through the cooperation of the shaft sleeve 121 and the constant torque structure 111 of the rotating shaft 10, and a variable torque can be provided through the cooperation between the swing arm mechanism 130 and the variable torque structure 112 of the rotating shaft 110. This variable torque can generate different torques according to the opening or closing of the device. This variable torque can have two aspects of changes: on the one hand, when the device is opened, a smaller torque is provided so that the user can open the device with a smaller force with one hand. When the device is closed, a larger torque is provided so that the first body of the device will not be automatically covered on the second body due to its own gravity, resulting in damage to the device. Thus, the characteristic of light opening and heavy closing of the device is realized; on the other hand, in the structure where the variable torque structure 112 includes multiple variable torque regions, during the opening process of the device, the damping force of the variable torque region gradually increases, resulting in a gradual increase in torque. When the device is in the use state, the stability of the first body and the stability when the screen of the first body is clicked are enhanced, so that the device can be in a stable use state.

[0125] The above Figures 12 to 18 Only the method of changing the torque between the roller 132 and the variable torque region by changing the radii of multiple variable torque regions is shown. However, it should be understood that the rotating shaft mechanism provided in this application is not limited to the above method, and other methods can also be adopted. From the formula of the damping force, it can be known that the magnitude of the damping force is related not only to the extrusion force but also to the damping coefficient. Therefore, the multiple variable torque regions provided in this application can also change the damping force (i.e., torque) when the roller 132 cooperates with different variable torque regions by changing the damping coefficients of different variable torque regions. Exemplarily, along the opening direction of the device (i.e., the first direction), the friction coefficient between the multiple variable torque regions and the roller 132 gradually increases. When the roller 132 contacts the multiple variable torque regions, due to the change of the friction coefficient, the torque between the roller 132 and the multiple variable torque regions can also change.

[0126] In the rotating shaft mechanism of this application, the constant torque structure 111 and the variable torque structure 112 of the rotating shaft 110 can be flexibly arranged to meet the actual requirements.

[0127] In some embodiments, the rotating shaft 110 includes a plurality of constant torque structures 111 and a plurality of variable torque structures 112 that are arranged at intervals along the axial direction of the rotating shaft 110. Among them, this application does not make any limitation on the positions between the constant torque structure 111 and the variable torque structure 112.

[0128] Exemplarily, the variable torque structure 112 can be arranged between any two adjacent constant torque structures 111. In this way, the force on both ends of the rotating shaft 110 can be balanced as much as possible, so that the rotating shaft mechanism has better stability.

[0129] For example, refer to Figure 6, the rotating shaft 110 includes two constant torque structures 111 and a variable torque structure 112, and the variable torque structure 112 is disposed between the two constant torque structures 111.

[0130] In some embodiments, the radius of the variable torque structure 112 is less than or equal to the radius of the constant torque structure. Thus, in embodiments where the variable torque structure 112 is disposed between the constant torque radii 111, it is convenient for the assembly of the rotating shaft 110 and the bracket 120.

[0131] In embodiments where the swing arm 131 is rotatably connected to the bracket 120, due to the inclined surface design of the guiding inclined surface 1312A of the roller bin 1312, the rotation of the rotating shaft 110 drives the roller 132 to rotate in the roller bin 1312 so that the swing arm 131 can rotate towards or away from the rotating shaft 110. To limit the displacement of the swing arm 131 towards the rotating shaft 110, a swing arm limiting structure can be provided on the bracket.

[0132] Figure 19 is another schematic assembly diagram of the rotating shaft mechanism provided by the application. Figure 20 is another exemplary cross-sectional view of the rotating shaft mechanism provided by the present application. Refer to Figure 19 and Figure 20 , a swing arm limiting structure 125 is provided on the bracket 120 on the side of the swing arm 131 close to the rotating shaft 110, and the swing arm limiting structure 125 corresponds to the position of the swing arm 131. Exemplarily, the swing arm limiting structure 125 is provided at the end of the bushing 121 of the bracket 120. When the swing arm 131 moves towards the rotating shaft 110 to a certain position, the swing arm 131 can abut against the swing arm limiting structure 125. Thus, the displacement amount of the swing arm 131 is limited by the swing arm limiting structure 125 to avoid jamming between the swing arm 131 and the rotating shaft 110 caused by excessive rotation of the swing arm 131. In addition, in a structure where the variable torque structure 112 includes multiple variable torque regions, when the variable torque region with the smallest radius (e.g., the first variable torque region) is in intermittent cooperation with the roller 132, under the action of the elastic member 133, by limiting the position of the swing arm 131 through the swing arm limiting structure 125, the intermittent cooperation between the roller 132 and this variable torque region can be better realized.

[0133] It can be understood that the present application does not make any limitation on the number of the swing arm limiting structures 125, and the number of the swing arm limiting structures 125 can be one, two, three or even more. Exemplarily, two swing arm limiting structures 125 are respectively provided at the opposite ends of the two bushings 121 of the bracket 120.

[0134] As described above, the swing arm 131 is rotatably connected to the bracket 120, and the swing arm 131 can rotate around the bracket 120. In other embodiments, the swing arm 131 and the bracket 120 may also be fixedly connected. In this embodiment, the swing arm 131 may not be provided with Figure 7 and Figure 8 the elastic member 133 shown.

[0135] In some embodiments, the swing arm 131 may be made of an elastic material. The swing arm 131 has elasticity and will deform. Due to the design of the guiding inclined surface 1312A, at the same rotation angle, when the roller 132 is located at the bottom end 1312-2 and the top end 1312-1 of the roller bin 1312, the swing arm 131 may have different deformations, so as to provide different extrusion forces for the variable torsion structure 112 to provide different damping forces, achieving the purpose of providing different torques.

[0136] In other embodiments, the roller 132 may be made of an elastic material. The roller 132 has elasticity. Due to the design of the guiding inclined surface 1312A, at the same rotation angle, when the roller 132 is located at the bottom end 1312-2 and the top end 1312-1 of the roller bin 1312, the roller 132 may have different deformations, so as to provide different extrusion forces for the variable torsion structure 112 to provide different damping forces, achieving the purpose of providing different torques.

[0137] When the rotating shaft mechanism of the present application is in use, the rotating shaft 110 and the bracket 120 rotate relative to each other to realize the relative rotation between the first body and the second body. When the device is in use, it is necessary to limit the maximum rotation angle between the first body and the second body to prevent excessive rotation angle of the first body from damaging the components inside the device. Therefore, continue to refer to Figure 5 and Figure 6 , a notch 126 is provided on the bracket 120, and a stop structure 114 cooperating with the notch 126 is provided on the rotating shaft 110. The stop structure 114 can rotate within the opening range of the notch 126. Referring to Figure 21 , when in use, the rotating shaft 110 rotates a certain angle, and the stop structure 114 can be pressed against the side wall 1261 of the notch 126 to limit the rotation angle of the rotating shaft 110, thereby limiting the opening angle of the electronic device.

[0138] The present application also provides a device with opening and closing performance. Exemplarily, the device may be a notebook computer. The description of the device can refer to Figure 1 and Figure 2 the description of the notebook computer, which will not be elaborated here. It should be noted that Figure 1 and Figure 2 the screen assembly 200 shown is an example of the first body fixedly connected to the rotating shaft 110 of the rotating shaft mechanism 100. Correspondingly, Figure 1 andFigure 2 The illustrated host component 300 is an example of a second body fixedly connected to the bracket 120 of the rotating shaft mechanism 100.

[0139] It should be understood that Figures 1 to 21 The structures of the various components in the illustrated device and the connection relationships between the components are only for illustrative purposes. The structures of any replaceable components that perform the same functions as each component are within the scope of protection of the embodiments of the present application.

[0140] It should be understood that in the embodiments of the present application, unless otherwise clearly specified and limited, terms such as "connection", "fixed connection", "rotating connection", and "contact" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above various terms in the embodiments of the present application can be understood according to specific circumstances.

[0141] Exemplarily, for "connection", it can be various connection methods such as fixed connection, rotating connection, flexible connection, movable connection, integrally formed, electrical connection, etc.; it can be directly connected, or, it can be indirectly connected through an intermediate medium, or, it can be the communication inside two elements or the interaction relationship between two elements.

[0142] Exemplarily, for "fixed connection", one element can be directly or indirectly fixedly connected to another element; fixed connection can include mechanical connection, welding, and bonding, etc. Among them, mechanical connection can include riveting, bolt connection, screw connection, key and pin connection, snap connection, lock connection, plug connection, etc., and bonding can include adhesive bonding and solvent bonding, etc.

[0143] Exemplarily, for the explanation of "contact", one element can be in direct contact or indirect contact with another element. In addition, the contact between the two elements described in the embodiments of the present application can be understood as the contact within the allowable range of installation error, and there can be a very small gap caused by the installation error.

[0144] It should also be understood that the "parallel" or "perpendicular" described in the embodiments of the present application can be understood as "approximately parallel" or "approximately perpendicular".

[0145] It should also be understood that the orientation or positional relationship indicated by terms such as "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0146] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0147] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "At least part of an element" means part or all of the element. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0148] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A rotating shaft mechanism for connecting a first body and a second body of a device, characterized in that, Comprising: A bracket, a swing arm, a roller and a rotating shaft; The rotating shaft can be fixedly connected to the first body, and includes a constant torque structure and a variable torque structure; The end of the rotating shaft is provided with a fixed structure, and anti-slip lines are provided on the outer surface of the fixed structure; The bracket can be fixedly connected to the second body, sleeved on the constant torque structure and connected to the swing arm; The swing arm is provided with a roller bin with an opening facing the rotating shaft and accommodating the roller. The rollers are respectively rotatably connected to the variable torque structure and the roller bin. When the rotating shaft rotates in the first direction, the rotating shaft can drive the roller to rotate towards the top end of the roller bin. When the rotating shaft rotates in the second direction opposite to the first direction, the rotating shaft can drive the roller to rotate towards the bottom end of the roller bin, wherein, The inner wall of the roller bin includes a guiding inclined surface, which inclines away from the rotating shaft in the extending direction from the bottom end to the top end, so that at the same rotation angle, when the roller is located at the bottom end, the roller generates a greater damping force relative to the variable torque structure than when it is located at the top end; Wherein, the first direction is the opening direction of the device, and the second direction is the closing direction of the device.

2. The rotating shaft mechanism according to claim 1, wherein The swing arm is rotatably connected to the bracket, and the swing arm can rotate around the axial direction of the rotating shaft; and, The rotating shaft mechanism further includes an elastic member, one end of the elastic member is fixed on the bracket and the other end abuts against the swing arm.

3. The rotating shaft mechanism according to claim 1 or 2, characterized in that, The variable torque structure includes a plurality of connected variable torque regions surrounding the axial direction of the rotating shaft. Along the first direction, the damping force between the roller and the plurality of variable torque regions gradually increases.

4. The rotating shaft mechanism according to claim 3, characterized in that, Along the first direction, the radii of the plurality of variable torque regions gradually increase.

5. The rotating shaft mechanism according to claim 3, wherein, There is a clearance fit between the variable torque region with the smallest radius among the plurality of variable torque regions and the roller.

6. The shaft mechanism according to claim 3, wherein, The plurality of variable torque regions include three variable torque regions, arranged in ascending order of radius. The central angle of the first variable torque region is between 0 degrees and 15 degrees, the central angle of the second variable torque region is between 15 degrees and 90 degrees, and the central angle of the third variable torque region is between 90 degrees and 135 degrees.

7. The shaft mechanism according to claim 1 or 2, characterized in that The bracket is provided with a swing arm limiting structure on the side of the swing arm close to the rotating shaft to limit the displacement of the swing arm rotating towards the rotating shaft.

8. The rotating shaft mechanism according to claim 7, characterized in that, The bracket is provided with a bushing sleeved on the constant torque structure, and the swing arm limiting structure is arranged at the end of the bushing.

9. The rotating shaft mechanism according to claim 1 or 2, characterized in that The guiding inclined surface is an arc surface.

10. The rotating shaft mechanism according to claim 1 or 2, characterized in that The inner wall of the roller bin further includes a top arc surface and a bottom arc surface connecting the guiding inclined surface.

11. The rotating shaft mechanism according to claim 10, wherein The top arc surface and the bottom arc surface have the same radius.

12. The shaft mechanism according to claim 10, wherein The radii of the top arc surface and the bottom arc surface are greater than the radius of the roller.

13. The rotating shaft mechanism according to claim 1 or 2, characterized in that, The radius of the variable torque structure is less than or equal to the radius of the constant torque structure.

14. A device with opening and closing performance, characterized in that, Comprising a first body, a second body and a rotating shaft mechanism according to any one of claims 1 to 13, wherein the first body is connected to the rotating shaft of the rotating shaft mechanism, and the second body is connected to the bracket of the rotating shaft mechanism.

15. The device according to claim 14, characterized in that, The device is a laptop computer, the first body is a screen assembly, and the second body is a host assembly.

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