A multi-axis hinge

Abstract

This invention provides a multi-axis hinge, comprising more than three shafts, a first side connecting arm, and a second side connecting arm. A synchronization mechanism is provided between the shafts. The synchronization mechanism includes a first-layer cam component, a second-layer cam component, and a third-layer cam component. Each of the first-layer, second-layer, and third-layer cam components includes a double-hole cam component, which has two cams respectively fitted onto two adjacent shafts. The first-layer, second-layer, and third-layer cam components connected to the first and second side connecting arms are single-hole cam components, fitted onto the outermost shaft. This invention achieves good synchronization by stacking three layers of cam components with parallel inclined planes. Under the support of elastic components, the two pairs of cams are always constrained and engaged on the inclined plane, ensuring that all cams move simultaneously to enable the entire mechanism to open and close. This results in good synchronization, avoiding the poor synchronization of previous multi-axis mechanisms.

Description

Technical Field

[0001] This utility model relates to a multi-axis hinge, and more particularly to a multi-axis hinge for a portable mobile terminal. The portable mobile terminal may be a laptop computer. Background Technology

[0002] One type of flattenable laptop uses a multi-axis hinge, which contains more than four axes. A synchronizing mechanism ensures the synchronized rotation of each axis, with each axis contributing an equal share of the total rotation angle. This synchronizing mechanism employs a pin-groove-based design to achieve synchronous movement across the multiple axes. However, this structure has relatively large gaps, and the cumulative effect of multiple axes can affect the required support angle. Utility Model Content

[0003] The purpose of this invention is to provide a multi-axis hinge that can provide synchronization of the rotation mechanisms of each axis, and further, improve structural safety and user experience. To this end, this invention adopts the following technical solution:

[0004] A multi-axis hinge includes more than three parallel shafts, a first side connecting arm, and a second side connecting arm. The hinge is characterized by a synchronization mechanism between the shafts. The synchronization mechanism includes a first-layer cam component, a second-layer cam component, and a third-layer cam component. Each of the first-layer, second-layer, and third-layer cam components includes a double-hole cam component. Each double-hole cam component has two cams, which are respectively fitted onto two adjacent shafts. The first side connecting arm is connected to the first-layer and third-layer cam components, or to the second-layer cam component. The second side connecting arm is connected to the first-layer and third-layer cam components, or to the second-layer cam component. The first-layer, second-layer, and third-layer cam components connected to the first and second side connecting arms are single-hole cam components, fitted onto the outermost shaft.

[0005] The second cam component is located between the first cam component and the third cam component. The first cam component and the third cam component are arranged on the same axis. The second cam component is staggered with the first cam component and the third cam component. The elastic component presses the second cam component against the first cam component and the third cam component.

[0006] The constraints between the cams are limited on the ramp. The three layers of cams are stacked on top of each other to form mutual constraints, ensuring that all cam components move simultaneously to drive the entire hinge to rotate. The ramp cam surfaces of the first and third layer cam components, which are used to control synchronous movement, are parallel. The second layer cam component is provided with a first cam and a second cam respectively. The ramp cam surfaces of the first and second cams, which are used to control synchronous movement, are parallel to the cam surfaces of the first and third layer cam components, respectively, and are pressed together by the elastic component.

[0007] Based on the above technical solutions, this utility model may also employ the following further technical solutions or a combination of these further technical solutions:

[0008] The elastic component acts on the first cam component through a sleeve with an operating hole. An adjusting nut is threaded onto the shaft to adjust the maximum gap between the first, second, and third cam components. The adjusting nut is located inside the sleeve. The adjusting nut is located between the first cam component and the elastic component to limit the first cam component and protect the elastic component.

[0009] In the first layer of cam components, the cam in the double-hole cam component rotates from the corresponding hinge to the flattened state to the unfolded platform. It cooperates with the cam of the second layer of cam components that cooperates with it to release the potential energy of the elastic component, thus having a pop-out feel when opened to the flattened state.

[0010] The number of shafts is 4 to 8. Further, the number of shafts is 6.

[0011] The elastic component is a stack of disc spring sheets; the elastic component is sleeved on the shaft.

[0012] The shaft has a stop structure on the outside of the third-layer cam component.

[0013] During hinge rotation, the cam component in the second-layer cam component is always making axial movements.

[0014] By employing the technical solution of this utility model, the two pairs of cams, supported by an elastic component, are always constrained and engaged on the inclined surface through the stacking of three layers of parallel inclined cam components. This ensures that all cams move simultaneously, enabling the entire mechanism to open and close. This results in good synchronization, avoiding the poor synchronization issues of previous multi-axis mechanisms. Furthermore, based on the above structure, this utility model also achieves cam adjustment and protection for disc springs when using them. It also provides a smooth turning feel at the flattened end, unlike previous models where the elastic component experiences maximum normal pressure and cam stress, this feeling occurs when the elastic component releases potential energy, thereby reducing cam stress and preventing increased cam wear. Attached Figure Description

[0015] Figure 1 This is an exploded view of the structure of an embodiment of the six-axis hinge of this utility model.

[0016] Figure 2 This is a top view of the six-axis hinge embodiment of this utility model in a flattened state.

[0017] Figure 3 This is a front view of the six-axis hinge embodiment of this utility model in a flattened state.

[0018] Figure 4 This is a top view of the six-axis hinge embodiment of this utility model in the folded state.

[0019] Figure 5 This is a front view of the six-axis hinge embodiment of this utility model in the folded state.

[0020] Figure 6 This is a schematic diagram of the double-hole cam components C2 and C3.

[0021] Figure 7 This is a schematic diagram of the first (top) cam of the double-hole cam components C5, C6, and C7.

[0022] Figure 8 This is a schematic diagram of the second (bottom) cam of the double-hole cam component C5, C6, and C7.

[0023] Figure 9 This is a schematic diagram of the double-hole cam components C9 and C10.

[0024] Figure 10 This is a schematic diagram of the single-hole cam component C8. Detailed Implementation

[0025] Referring to the accompanying drawings, this embodiment relates to a six-axis hinge, with the axes numbered A1, A2, A3, A4, A5, and A6 in sequence. The axes are parallel to each other. The hinge also includes a first-side connecting arm S1 and a second-side connecting arm S2. The first-side connecting arm S1 and the second-side connecting arm S2 are used to connect the hinge to a portable mobile terminal, such as connecting it to the screen housing and main unit housing of a laptop computer, respectively.

[0026] A synchronization mechanism is provided between shafts A1, A2, A3, A4, A5, and A6. The working angle of the hinge is 0-180°, and the working angle of a single shaft is 30°. From left to right, the synchronization mechanism includes a first-layer cam component L1, a second-layer cam component L2, and a third-layer cam component L3. The first-layer cam component L1 includes double-hole cam components C2 and C3. The second-layer cam component L2 includes double-hole cam components C5, C6, and C7. The third-layer cam component L3 includes double-hole cam components C9 and C10. Each double-hole cam component is provided with two cams, which are respectively fitted onto two adjacent shafts. The first connecting arm S1 is connected to the first layer cam component L1 and the third layer cam component L3. The second connecting arm S2 is connected to the second layer cam component L2. The first layer cam component and the third layer cam component connected to the first connecting arm S1 are single-hole cam components C1 and C8, respectively, which are fitted on the leftmost shaft A1. The first layer cam component and the third layer cam component connected to the second connecting arm S2 are single-hole cams C4 and C11, respectively, which are fitted on the rightmost shaft A6.

[0027] The second cam component L2 is located between the first cam component L1 and the third cam component L3. The first cam component L1 and the third cam component L3 are mounted on the same shaft. The second cam component L2 is staggered with the first cam component L1 and the third cam component L3 (for example, the double-hole cam component 2 of the first cam component L1 and the double-hole cam 8 of the third cam component L3 are both fitted onto shafts A2 and A3, while the double-hole cam component 5 of the second cam component L2 is fitted onto shafts A1 and A2, and the double-hole cam component 6 is fitted onto shafts A3 and A4). Furthermore, the elastic component 1 presses the second cam component L2 against the first cam component L1 and the third cam component L2.

[0028] The constraints between the cams are limited on the ramp cam surface. The three layers of cams are stacked on each other to form mutual constraints, ensuring that all cam components move simultaneously to drive the entire hinge to rotate. The ramp cam surfaces M1 and M3 of the first layer cam component L1 and the third layer cam component L3, which are used to control synchronous movement, are parallel. The second layer cam component L2 is provided with a first cam L21 and a second cam L22. The ramp cam surfaces M21 and M22 of the first cam L21 and the second cam L22, which are used to control synchronous movement, are parallel to the ramp cam surfaces M1 and M3 of the first layer cam component and the third cam component, respectively, and are pressed and fitted by the elastic component 1 (the ramp cam surfaces M21 and M22 are also parallel). The middle layer, namely the second layer cam component and the first layer cam component, can slide in the circumferential direction relative to the axis. During the hinge rotation, the cam components C5, C6, and C7 in the second layer cam component L2 are always moving axially. The ramp cam surfaces M1 and M3 of the first-layer cam component L1 and the third-layer cam component L3 drive the cam axis movement and displacement of the second-layer cam component during the rotation of the hinge in different directions.

[0029] The inclined cam surface M1 is provided in each cam component of the first-layer cam component L1, and the inclined cam surface M3 is provided in each cam component of the third-layer cam component L3. The inclined cam surfaces M21 and M22 are provided in each cam component of the second-layer cam component L2.

[0030] The elastic component 1 is a stack of disc spring sheets; the elastic component 1 is sleeved on shafts A1, A2, A3, A4, A5 and A6.

[0031] The elastic component 1 acts on the first cam component L1 through the sleeve 2 with the operating hole 20. The shafts A1, A2, A3, A4, A5 and A6 are threaded with adjusting nuts 3, which can adjust the maximum gap between the first cam component L1, the second cam component L2 and the third cam component L3. The operating hole 20 is used to operate the adjusting nut 3 in the sleeve 2. The adjusting nut 3 is located between the first cam component L1 and the elastic component 1, which can limit the first cam component 1. In the event of a fall, it prevents the cam from damaging the elastic component 1 and protects the elastic component 1.

[0032] In the first-layer cam component, the cams of the double-hole cam components C2 and C4, within the rotation range corresponding to the hinge approaching the flattened state to the flattened state (corresponding to the flattening of the portable mobile terminal), have a coordination 4 with the cam of the second-layer cam component L2 that cooperates with them to release the potential energy of the elastic component. This coordination can be achieved by changing the top of the sloping cam surface M1 of these cams (corresponding to the rotation range corresponding to the hinge approaching the flattened state to the flattened state) to a gentle slope (or a flat slope) with a smaller inclination angle than the sloping cam surface M1. Within this movement range, the double-hole cam components C2 and C4 in the first-layer cam component L1 can be slightly displaced axially away from the elastic component 1, releasing some of the elastic potential energy and obtaining the tactile feedback of popping out to the flattened state.

[0033] Shafts A1, A2, A3, A4, A5, and A6 are provided with stop structures on the outside of the third-layer cam component L3. For example, a baffle 51 is provided and connected to the shaft with a nut 52, and the baffle 51 is threaded. Shafts A1, A2, A3, A4, A5, and A6 are also threaded with limiting nuts 6 on the back of the elastic component 1 to limit and support the elastic component 1.

[0034] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the protection scope of the present utility model.

[0035] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "linked," and "sleeve" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

Claims

1. A multi-axis hinge comprising more than 3 parallel axes, a first side connecting arm and a second side connecting arm, characterized in that, A synchronization mechanism is provided between the shafts. The synchronization mechanism includes a first-layer cam component, a second-layer cam component, and a third-layer cam component. The first-layer cam component, the second-layer cam component, and the third-layer cam component each include a double-hole cam component. The double-hole cam component is provided with two cams, which are respectively sleeved on two adjacent shafts. The first-side connecting arm is connected to the first-layer cam component and the third-layer cam component, or to the second-layer cam component. The second-side connecting arm is connected to the first-layer cam component and the third-layer cam component, or to the second-layer cam component. The first-layer cam component, the second-layer cam component, and the third-layer cam component connected to the first-side connecting arm and the second-side connecting arm are single-hole cam components, which are sleeved on the outermost shaft. The second cam component is located between the first cam component and the third cam component. The first cam component and the third cam component are arranged on the same axis. The second cam component is staggered with the first cam component and the third cam component. The elastic component presses the second cam component against the first cam component and the third cam component. The constraints between the cams are limited on the ramp. The three layers of cams are stacked on top of each other to form mutual constraints, ensuring that all cam components move simultaneously to drive the entire hinge to rotate. The ramp cam surfaces of the first and third layer cam components, which are used to control synchronous movement, are parallel. The second layer cam component is provided with a first cam and a second cam respectively. The ramp cam surfaces of the first and second cams, which are used to control synchronous movement, are parallel to the cam surfaces of the first and third layer cam components, respectively, and are pressed together by the elastic component.

2. A polyaxial joint as in claim 1, wherein, The elastic component acts on the first cam component through a sleeve with an operating hole. An adjusting nut is threaded onto the shaft to adjust the maximum gap between the first, second, and third cam components. The adjusting nut is located inside the sleeve. The adjusting nut is located between the first cam component and the elastic component to limit the first cam component and protect the elastic component.

3. A multi-axis hinge as described in claim 1 or 2, characterized in that, In the first layer of cam components, the cam in the double-hole cam component rotates from the corresponding hinge to the flattened state to the unfolded platform. It cooperates with the cam of the second layer of cam components that cooperates with it to release the potential energy of the elastic component, thus having a pop-out feel when opened to the flattened state.

4. A multi-axis hinge as described in claim 1, characterized in that, The number of shafts is 4 to 8.

5. A multi-axis hinge as described in claim 1, characterized in that, The number of shafts is 6.

6. A multi-axis hinge as described in claim 1, characterized in that, The elastic component is a stack of disc spring sheets; the elastic component is sleeved on the shaft.

7. A multi-axis hinge as described in claim 1, characterized in that, The shaft has a stop structure on the outside of the third-layer cam component.

8. A multi-axis hinge as described in claim 1, characterized in that, During hinge rotation, the cam component in the second-layer cam component is always making axial movements.

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