Folding mobile terminal and cam synchronous double-shaft hinge mechanism applied to folding mobile terminal

Abstract

The utility model provides a folding type mobile terminal and cam synchronization biaxial hinge mechanism, including parallel first shaft and second shaft, the cam synchronization reverse rotation connection structure is connected between the first shaft and the second shaft, the cam synchronization reverse rotation connection structure includes first synchronization cam group and second synchronization cam group, the first synchronous cam group and the second synchronous cam group are respectively connected with the first shaft and the second shaft, so that the first shaft and the second shaft synchronously and reversely rotate; synchronous cams in the first synchronous cam group and the second synchronous cam group are double-crest cams, so that two pairs of matching surfaces of the matched synchronous cams are contacted and matched at the same time. On the basis that the synchronous cam is adopted as a synchronous mechanism, the problem that the using effect is affected by precision is solved.

Description

Technical Field

[0001] The utility model relates to a foldable mobile terminal and a double-axis hinge mechanism used therein. The foldable mobile terminal may be a flexible screen mobile terminal. Background Art

[0002] At present, the thickness control requirements for mobile terminals such as laptops and mobile phones are getting higher and higher. Among them, the synchronization mechanism in the hinge is a limiting factor affecting the thickness reduction. Using a synchronization cam as a synchronization mechanism is more conducive to thinning the thickness than using a gear as a synchronization mechanism. However, the synchronization cam is difficult to make and is prone to motion gaps due to precision, which affects the user experience. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a cam-synchronized dual-axis hinge mechanism used in a foldable mobile terminal, which can avoid the use effect being affected by precision on the basis of using a synchronous cam as a synchronization mechanism. To this end, the present invention adopts the following technical solutions:

[0004] A cam-synchronous dual-axis hinge mechanism used in a foldable mobile terminal comprises a first axis and a second axis in parallel, wherein a cam-synchronous reverse rotation connection structure is connected between the first axis and the second axis, wherein the cam-synchronous reverse rotation connection structure comprises a first synchronous cam group and a second synchronous cam group, wherein the first synchronous cam group and the second synchronous cam group are respectively connected to the first axis and the second axis, so that the first axis and the second axis rotate synchronously in reverse; the characteristic is that the synchronous cams in the first synchronous cam group and the second synchronous cam group adopt double-peak cams, so that two pairs of mating surfaces of the mating synchronous cams are in contact and mating with each other at the same time.

[0005] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions, or use these further technical solutions in combination:

[0006] The cam synchronous reverse rotation connection structure is provided with a clamping elastic mechanism, which clamps the synchronous cams in the first synchronous cam group into a tight fit, and clamps the synchronous cams in the second synchronous cam group into a tight fit.

[0007] The compression elastic mechanism adopts a spring group, the springs in the spring group are respectively sleeved on the first shaft and the second shaft, and the first synchronous cam group and the second synchronous cam group are respectively sleeved on the first shaft and the second shaft.

[0008] The first synchronous cam group and the second synchronous cam group are arranged symmetrically and oppositely.

[0009] The cam synchronous reverse rotation connection structure is provided with a clamping elastic mechanism, which clamps the synchronous cam in the first synchronous cam group and the synchronous cam in the second synchronous cam group; the synchronous cams in the first synchronous cam group and the second synchronous cam group include a first rotating cam, a second rotating cam and a sliding cam, the first rotating cam and the second rotating cam are connected to the shaft and rotate synchronously, the sliding cam is located between the first rotating cam and the second rotating cam, the two ends of the sliding cam are respectively in contact with the first rotating cam and the second rotating cam using the two pairs of mating surfaces, and the sliding cams in the first synchronous cam group and the second synchronous cam group are connected by a connecting structure and slide synchronously in the same direction.

[0010] The connection structure is a concave arc-shaped connection plate or a connection block with a concave top surface.

[0011] The second rotating cam is located at the end close to the clamping elastic mechanism, and the first torque cam is arranged between the second rotating cam and the clamping elastic mechanism. The first torque cams of the first synchronous cam group and the second synchronous cam group are respectively sleeved on the first shaft and the second shaft, and are respectively slidably connected with the first shaft and the second shaft, and the first shaft and the second shaft can rotate relative to the first torque cam; the second torque cam is arranged at the end of the second rotating cam close to the clamping elastic mechanism, and the clamping spring mechanism also presses the first torque cam and the second torque cam into fit.

[0012] According to a second aspect of the present invention, the present invention provides a foldable mobile terminal, which is provided with the above-mentioned cam-synchronized dual-axis hinge mechanism.

[0013] Furthermore, the foldable mobile terminal is an inward-folding flexible screen mobile terminal, comprising a left shell and a right shell, and the left shell and the right shell are respectively connected to the rotating cams in the first synchronous cam group and the second synchronous cam group.

[0014] Due to the adoption of the technical solution of the utility model, the utility model can be conducive to providing a foldable mobile terminal with a thinner thickness and a better user experience. The dual-axis reverse rotation connection is realized through the symmetrical and oppositely arranged double-peak synchronization cams, which not only solves the thickness restriction problem brought by the gear synchronization mechanism and the problem of non-complete synchronization of rotation caused by the size meshing gap. At the same time, the cam method is used to apply force evenly. Furthermore, by introducing elastic components into the synchronization cam, the problem of the use effect being affected by accuracy can be improved. At the same time, the spring can greatly compensate for the problem of increased clearance caused by the wear of parts after long-term use. Furthermore, it can cooperate with the double-peak synchronization cam to make the rotation smoother and further improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the cam synchronous double-axis hinge mechanism of the utility model.

[0016] Figure 2 The figure is a demonstration diagram of the hinge movement process corresponding to the process of folding to flattening of the foldable mobile terminal.

[0017] Figure 3 It is an exploded view of the cam synchronized dual-axis hinge mechanism of the utility model.

[0018] Figure 4 The figure is a demonstration diagram of the changes in the coordination of the synchronous cams corresponding to the process from folding to flattening of the foldable mobile terminal.

[0019] Figure 5 It is a schematic diagram of the coordination of the double-peak synchronous cam of the utility model.

[0020] Figure 6 It is a schematic diagram of the expansion of the double-peak synchronous cam of the utility model. DETAILED DESCRIPTION

[0021] Referring to the accompanying drawings, the utility model provides a cam synchronous dual-axis hinge mechanism for a foldable mobile terminal, comprising a parallel first axis 1 and a second axis 2, wherein a cam synchronous reverse rotation connection structure is connected between the first axis 1 and the second axis 2, wherein the cam synchronous reverse rotation connection structure comprises a first synchronous cam group and a second synchronous cam group, wherein the first synchronous cam group and the second synchronous cam group are respectively connected to the first axis 1 and the second axis 2, so that the first axis 1 and the second axis 2 rotate synchronously and reversely.

[0022] like Figure 5 , 6 As shown in detail, the synchronous cams in the first synchronous cam group and the second synchronous cam group adopt double-peak cams, and there are two groups of synchronous matching cam surfaces along the circumferential direction, which are marked with A and B respectively. The synchronous matching cam surfaces A and B are the same and are arranged in sequence along the circumferential direction, so that there are two pairs of matching surfaces 100 in contact and matching between the matching synchronous cams at the same time, and the matching surfaces 100 of each pair have the same curvature and change rate.

[0023] The cam synchronous reverse rotation connection structure is provided with a compression elastic mechanism, which compresses the synchronization cams in the first synchronization cam group and the synchronization cams in the second synchronization cam group. In this embodiment, the compression elastic mechanism adopts a spring group, and the springs 3 in the spring group are respectively sleeved on the first shaft 1 and the second shaft 2, and the first synchronization cam group and the second synchronization cam group are respectively sleeved on the first shaft and the second shaft.

[0024] The synchronous cams in the first synchronous cam group and the second synchronous cam group include a first rotating cam 41, a second rotating cam 42 and a sliding cam 43. The first rotating cam 41 and the second rotating cam 42 are connected to the shaft and rotate synchronously, for example, connected to the first shaft 1 or the second shaft 2 through a flat connection.

[0025] The sliding cam 43 is located between the first rotating cam 41 and the second rotating cam 42. The two ends of the sliding cam 43 are respectively in contact with the first rotating cam 41 and the second rotating cam 42 using the two pairs of mating surfaces 100. The sliding cams 43 in the first synchronous cam group and the second synchronous cam group are connected by a connecting structure and slide synchronously in the same direction. The first synchronous cam group and the second synchronous cam group are symmetrically arranged in opposite directions, that is, the cam curves of the first rotating cam 41 of the first synchronous cam group and the second synchronous cam group are the same but in opposite relationship, the cam curves of the second rotating cam 42 of the first synchronous cam group and the second synchronous cam group are the same but in opposite relationship, and the cam curves of the same ends of the sliding cams 43 of the first synchronous cam group and the second synchronous cam group are the same but in opposite relationship.

[0026] For the mobile terminal with an inward folding flexible screen, compared with the gear synchronous reverse transmission structure, the structure of the utility model can replace the intermediate gear with the connecting structure, and the shape of the connecting structure can be designed to adapt to the curved shape of the flexible screen, and the width and length are free, which further helps to reduce the thickness of the mobile terminal. In this embodiment, the connecting structure is a concave arc-shaped connecting plate 44 or a connecting block with a concave top surface.

[0027] The second rotating cam 42 is located at the end close to the clamping elastic mechanism, and the first torque cam 6 is arranged between the second rotating cam 42 and the clamping elastic mechanism. The first torque cams 6 of the first synchronous cam group and the second synchronous cam group are respectively sleeved on the first shaft 1 and the second shaft 2, and are respectively slidably connected with the first shaft 1 and the second shaft 2, and the first shaft 1 and the second shaft 2 can rotate relative to the first torque cam 6; the second rotating cam 42 is provided with a second torque cam 421 at the end close to the clamping elastic mechanism, and the clamping spring mechanism also presses the first torque cam 6 and the second torque cam 421 together, and the first torque cam 41 and the second torque cam 42 cooperate to output a rotational resistance torque.

[0028] As mentioned above, the foldable mobile terminal of this embodiment takes the inward folding flexible screen mobile terminal as an example, and the inward folding flexible screen mobile terminal includes a left shell and a right shell, and the left shell and the right shell are respectively connected to the rotating cam in the first synchronous cam group and the second synchronous cam group, which can be fixedly connected, slidably connected, directly connected, or connected by means of a connecting structure. In this embodiment, the rotating cam in the first synchronous cam group and the second synchronous cam group is provided with a connecting handle 45, and the left shell and the right shell are respectively slidably connected to the connecting handle 45 of the rotating cam in the first synchronous cam group and the second synchronous cam group through a fixed block 5.

[0029] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the protection scope of the present invention.

[0030] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are also used only for the simplicity of description, and do not indicate or imply relative importance.

Claims

1. A cam-synchronized dual-axis hinge mechanism used in a foldable mobile terminal, comprising a parallel first axis and a second axis, wherein a cam-synchronized reverse rotation connection structure is connected between the first axis and the second axis, wherein the cam-synchronized reverse rotation connection structure comprises a first synchronous cam group and a second synchronous cam group, wherein the first synchronous cam group and the second synchronous cam group are respectively connected to the first axis and the second axis, so that the first axis and the second axis rotate synchronously and reversely; characterized in that The synchronous cams in the first synchronous cam group and the second synchronous cam group are double-peak cams, so that two pairs of matching surfaces are in contact and matching with each other between the matching synchronous cams.

2. The cam-synchronized dual-axis hinge mechanism for a foldable mobile terminal as claimed in claim 1, characterized in that The cam synchronous reverse rotation connection structure is provided with a clamping elastic mechanism, which clamps the synchronous cams in the first synchronous cam group into a tight fit, and clamps the synchronous cams in the second synchronous cam group into a tight fit.

3. The cam-synchronized dual-axis hinge mechanism for a foldable mobile terminal as claimed in claim 2, characterized in that The compression elastic mechanism adopts a spring group, the springs in the spring group are respectively sleeved on the first shaft and the second shaft, and the first synchronous cam group and the second synchronous cam group are respectively sleeved on the first shaft and the second shaft.

4. The cam-synchronized dual-axis hinge mechanism for a foldable mobile terminal as claimed in claim 1, characterized in that The first synchronous cam group and the second synchronous cam group are arranged symmetrically and oppositely.

5. The cam-synchronized dual-axis hinge mechanism for a foldable mobile terminal as claimed in claim 1 or 4, characterized in that The cam synchronous reverse rotation connection structure is provided with a clamping elastic mechanism, which clamps the synchronous cam in the first synchronous cam group and the synchronous cam in the second synchronous cam group; the synchronous cams in the first synchronous cam group and the second synchronous cam group include a first rotating cam, a second rotating cam and a sliding cam, the first rotating cam and the second rotating cam are connected to the shaft and rotate synchronously, the sliding cam is located between the first rotating cam and the second rotating cam, the two ends of the sliding cam are respectively in contact with the first rotating cam and the second rotating cam using the two pairs of mating surfaces, and the sliding cams in the first synchronous cam group and the second synchronous cam group are connected by a connecting structure and slide synchronously in the same direction.

6. The cam-synchronized dual-axis hinge mechanism for a foldable mobile terminal as claimed in claim 5, characterized in that The connection structure is a concave arc-shaped connection plate or a connection block with a concave top surface.

7. The cam-synchronized dual-axis hinge mechanism for a foldable mobile terminal as claimed in claim 5, characterized in that The second rotating cam is located at the end close to the clamping elastic mechanism, and the first torque cam is arranged between the second rotating cam and the clamping elastic mechanism. The first torque cams of the first synchronous cam group and the second synchronous cam group are respectively sleeved on the first shaft and the second shaft, and are respectively slidably connected with the first shaft and the second shaft, and the first shaft and the second shaft can rotate relative to the first torque cam; the second torque cam is arranged at the end of the second rotating cam close to the clamping elastic mechanism, and the clamping spring mechanism also presses the first torque cam and the second torque cam into fit.

8. A foldable mobile terminal, characterized in that The foldable mobile terminal is provided with the cam-synchronized dual-axis hinge mechanism according to claim 1.

9. The foldable mobile terminal according to claim 8, characterized in that The foldable mobile terminal is an inward-folding flexible screen mobile terminal, comprising a left shell and a right shell, wherein the left shell and the right shell are respectively connected to the rotating cams in the first synchronous cam group and the second synchronous cam group.

Images