Pivot device and electronic device using same
By designing a hub including a base, a virtual shaft connecting rod, a slider, an elastic member and a connecting mechanism, the problem of difficulty in providing effective torque compensation when the two plates are unfolded or closed in the prior art is solved, and additional torque compensation is provided at critical angles to avoid collision damage.
Patent Information
- Application Number
- CN202422313266.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The hubs of existing electronic devices are difficult to effectively provide torque compensation when the two plates are unfolded or closed, resulting in possible collisions with the tabletop or collisions with each other, causing damage.
A hub including a base, a virtual shaft connecting rod, a slider, an elastic member and a connecting mechanism is designed to provide additional torque compensation through the sliding connection and the fit of the elastic member, and additional torque is started when the two plates are deployed to 180 degrees or closed to 0 degrees.
The torque compensation is achieved when the two plate bodies are unfolded or closed, and collision damage caused by the two plate bodies being unfolded or closed too quickly.
Smart Images
Figure CN222977231U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hub and an electronic device using the same, in particular to a hub with a torque compensation function and an electronic device using the same. Background Art
[0002] An existing electronic device includes a hub, two plate bodies and a screen. The hub is connected between the two plate bodies so that the two plate bodies can be relatively unfolded and folded. The screen is arranged on the two plate bodies. In order to protect the two plate bodies and the screen arranged thereon, the existing hub provides a falling angle torque compensation function, that is, when the two plate bodies are relatively unfolded to an included angle close to 180 degrees, additional torque is provided, so as to avoid the two plate bodies being relatively unfolded to an included angle of 180 degrees too quickly and possibly colliding with the desktop and causing damage. However, the existing hub uses a relatively complex mechanism, such as a mechanism mainly composed of pulleys or magnets, to realize the falling angle torque compensation function, and it cannot start to provide additional torque when the two plate bodies are relatively folded too quickly to an included angle close to 0 degrees to avoid possible mutual collision and damage of the two plate bodies. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a hub and an electronic device using the same, which use a relatively simple mechanism to realize the torque compensation function, and can start to provide additional torque when the two plate bodies are relatively unfolded to an included angle close to 180 degrees or relatively folded to an included angle close to 0 degrees to realize the torque compensation function.
[0004] To achieve the above object, the utility model provides a hub, which includes a base, two virtual axis linkages, four first sliding rods, two first elastic members and a first linkage mechanism. The base includes two pivot side edges arranged oppositely and two mounting side edges arranged oppositely, and each pivot side edge is provided with a first arc connecting portion. Each virtual axis linkage is provided with a second arc connecting portion, a first sliding groove, two first limiting grooves and a first accommodating groove. The second arc connecting portion is slidably connected to the corresponding first arc connecting portion. The two first limiting grooves are communicated with the first sliding groove, and both ends of the first accommodating groove are respectively communicated with the two first limiting grooves. Each first sliding rod is slidably arranged in the corresponding first limiting groove and one end extends into the corresponding first sliding groove. Each first elastic member is arranged in the corresponding first accommodating groove and both ends respectively extend into the corresponding two first limiting grooves to be connected to the corresponding two first sliding rods. The first linkage mechanism is detachably arranged on one of the two mounting side edges. The first linkage mechanism includes two first rotating shafts and two first solid axis linkages. The two first solid axis linkages are respectively connected to the two first rotating shafts. Each first solid axis linkage is provided with a first convex rod, and the first convex rod is slidably connected to the corresponding first sliding groove and is located between the corresponding two first sliding rods.
[0005] In an embodiment of the present utility model, concave portions are formed on each pivot side, and two first arc-shaped connecting portions are respectively formed on two opposite side walls of the concave portion. Each virtual axis connecting rod is formed with a convex portion, and two second arc-shaped connecting portions are respectively formed on two opposite side edges of the convex portion.
[0006] In an embodiment of the present utility model, the first arc-shaped connecting portion is an arc-shaped convex rib, and the second arc-shaped connecting portion is an arc-shaped sliding groove corresponding to the aforementioned arc-shaped convex rib.
[0007] In an embodiment of the present utility model, the first linkage mechanism further includes two first gears and a plurality of first idler gears. Each first gear is fixedly sleeved on a corresponding first rotating shaft, and the two first gears are meshed through the plurality of first idler gears, so that the two first gears rotate simultaneously in opposite directions.
[0008] In an embodiment of the present utility model, the first linkage mechanism further includes a first torsion generating module. The first torsion generating module includes two first cam and groove groups and two first elastic member groups. Each first cam and groove group is combined with a corresponding first solid axis connecting rod, and each first elastic member group abuts against the corresponding first cam and groove group and provides torsion to the corresponding first solid axis connecting rod by pushing the corresponding first cam and groove group.
[0009] In an embodiment of the present utility model, each virtual axis connecting rod is further provided with a second sliding groove, two second limiting grooves and a second accommodating groove. The two second limiting grooves communicate with the second sliding groove, and both ends of the second accommodating groove communicate with the two second limiting grooves respectively. The hub further includes four second sliding rods, two second elastic members and a second linkage mechanism. Each second sliding rod is slidably disposed in a corresponding second limiting groove and one end extends into the corresponding second sliding groove. Each second elastic member is disposed in the corresponding second accommodating groove and both ends extend into the corresponding two second limiting grooves respectively to be connected to the corresponding two second sliding rods. The second linkage mechanism is detachably disposed on the other installation side of the two installation sides. The second linkage mechanism includes two second rotating shafts and two second solid axis connecting rods. The two second solid axis connecting rods are respectively connected to the two second rotating shafts. Each second solid axis connecting rod is provided with a second convex rod, and the second convex rod is slidably connected to the corresponding second sliding groove and is located between the corresponding two second sliding rods.
[0010] In an embodiment of the present utility model, each virtual axis connecting rod is further provided with two communication grooves. Both ends of each communication groove communicate with the corresponding first limiting groove and the second limiting groove respectively. The hub further includes four connecting rods. Each connecting rod is slidably disposed in the corresponding communication groove and both ends are respectively connected to the corresponding first sliding rod and the second sliding rod.
[0011] In an embodiment of the present utility model, the second linkage mechanism further includes two second gears and a plurality of second idler gears. Each second gear is fixedly sleeved on a corresponding second rotating shaft, and the two second gears are meshed through these second idler gears, so that the two second gears rotate simultaneously in opposite directions.
[0012] In an embodiment of the present utility model, the second linkage mechanism further includes a second torsion generating module, which includes two second cam groups and two second elastic member groups. Each second cam group is coupled to a corresponding second physical shaft link, and each second elastic member group abuts against the corresponding second cam group and provides torsion to the corresponding second physical shaft link by pressing the corresponding second cam group.
[0013] The present utility model also provides an electronic device, which includes the aforementioned hub, two plate bodies and a screen. Each plate body is fixedly connected to the corresponding virtual shaft link of the hub. The screen is disposed on the two plate bodies.
[0014] To make the above and other objects, features and advantages of the present utility model more obvious and understandable, preferred embodiments are hereinafter specifically described in detail in conjunction with the accompanying drawings. Description of the Drawings
[0015] Figure 1 Is a perspective view of the hub according to the first embodiment of the present utility model.
[0016] Figure 2 Is Figure 1 A partial exploded view of the illustrated hub.
[0017] Figure 3 Is Figure 1 A perspective view of the illustrated hub from another perspective.
[0018] Figure 4 Is Figure 3 A partial exploded view of the illustrated hub.
[0019] Figures 5A to 5E Respectively are Figure 1 Side view schematic diagrams of the illustrated hub at relative angles of 0, 45, 90, 135 and 180 degrees.
[0020] Figure 6 Is a perspective view of the hub according to the second embodiment of the present utility model.
[0021] Figure 7 Is Figure 6 A partial exploded view of the illustrated hub.
[0022] Figure 8 Is a perspective view of the hub according to the third embodiment of the present utility model.
[0023] Figure 9 Is Figure 8 A partial exploded view of the illustrated hub.
[0024] Figure 10 Is a perspective view of the electronic device according to an embodiment of the present utility model.
[0025] Figure 11 is Figure 10 a partial exploded view of the electronic device shown in the figure. Specific Embodiments
[0026] In the following embodiments, the same or similar reference numerals represent the same or similar components. In addition, the directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only with reference to the direction of the drawings. Therefore, the directional terms used are for illustration purposes only and are not used to limit the present utility model.
[0027] Please refer to Figures 1 to 4 and Figure 1 which is a perspective view of the hub 1 according to an embodiment of the present utility model, Figure 2 is Figure 1 a partial exploded view of the hub 1 shown in the figure, Figure 3 is Figure 1 a perspective view of the hub 1 shown in the figure from another perspective, Figure 4 is Figure 3 a partial exploded view of the hub 1 shown in the figure. The hub 1 includes a base 10, two virtual axis linkages 20, four first sliding rods 30, two first elastic members 40 and a first linkage mechanism 50.
[0028] The base 10 includes two pivot side edges 11 arranged oppositely and two mounting side edges 12 arranged oppositely. Each pivot side edge 11 is provided with a first arc-shaped connecting portion 14. Each virtual axis linkage 20 is provided with a second arc-shaped connecting portion 22, and the second arc-shaped connecting portion 22 is slidably connected to the corresponding first arc-shaped connecting portion 14. Through the slidable connection between the second arc-shaped connecting portion 22 and the first arc-shaped connecting portion 14, the virtual axis linkage 20 is pivotally connected to the pivot side edge 11 of the base 10 in the manner of a virtual axis.
[0029] In this embodiment, each pivot side edge 11 of the base 10 is formed with a recess 13, and two opposite side walls of the recess 13 respectively form two first arc-shaped connecting portions 14; correspondingly, each virtual axis linkage 20 is formed with a protrusion 21, and two opposite side edges of the protrusion 21 respectively form two second arc-shaped connecting portions 22. In this embodiment, the first arc-shaped connecting portion 14 is an arc-shaped convex rib, and the second arc-shaped connecting portion 22 is an arc-shaped sliding groove corresponding to the aforementioned arc-shaped convex rib. In addition, the two recesses 13 of the two pivot side edges 11 are arranged in a staggered manner, so the two protrusions 21 of the two virtual axis linkages 20 are also arranged in a staggered manner due to corresponding to the recesses 13.
[0030] Each virtual axis connecting rod 20 is further provided with a first sliding groove 23, two first limiting grooves 24, a first accommodating groove 25 and a fixing portion 26. The two first limiting grooves 24 communicate with the first sliding groove 23, and both ends of the first accommodating groove 25 communicate with the two first limiting grooves 24 respectively. Each first sliding rod 30 is slidably disposed in the corresponding first limiting groove 24 and one end extends into the corresponding first sliding groove 23. Each first elastic member 40 is disposed in the corresponding first accommodating groove 25 and both ends extend into the corresponding two first limiting grooves 24 respectively to be connected to the corresponding two first sliding rods 30. The first linkage mechanism 50 is detachably disposed on one of the two mounting sides 12. The first linkage mechanism 50 includes two first rotating shafts 51 and two first solid axis connecting rods 52. The two first solid axis connecting rods 52 are respectively connected to the two first rotating shafts 51, and each first solid axis connecting rod 52 rotates around the corresponding first rotating shaft 51. Each first solid axis connecting rod 52 is provided with a first convex rod 53, and the first convex rod 53 is slidably connected to the corresponding first sliding groove 23 and is located between the corresponding two first sliding rods 30.
[0031] In this embodiment, each virtual axis connecting rod 20 is further provided with a second sliding groove 23', two second limiting grooves 24' and a second accommodating groove 25'. The two second limiting grooves 24' communicate with the second sliding groove 23', and both ends of the second accommodating groove 25' communicate with the two second limiting grooves 24' respectively. The hub 1 further includes four second sliding rods 30', two second elastic members 40' and a second linkage mechanism 50'. Each second sliding rod 30' is slidably disposed in the corresponding second limiting groove 24' and one end extends into the corresponding second sliding groove 23'. Each second elastic member 40' is disposed in the corresponding second accommodating groove 25' and both ends extend into the corresponding two second limiting grooves 24' respectively to be connected to the corresponding two second sliding rods 30'. The second linkage mechanism 50' is detachably disposed on the other of the two mounting sides 12. The second linkage mechanism 50' includes two second rotating shafts 51' and two second solid axis connecting rods 52'. The two second solid axis connecting rods 52' are respectively connected to the two second rotating shafts 51', and each second solid axis connecting rod 52' rotates around the corresponding second rotating shaft 51'. Each second solid axis connecting rod 52' is provided with a second convex rod 53', and the second convex rod 53' is slidably connected to the corresponding second sliding groove 23' and is located between the corresponding two second sliding rods 30'. In addition, in this embodiment, the first elastic member 40 and the second elastic member 40' are tension springs.
[0032] Please refer to Figures 5A to 5E , Figures 5A to 5E respectively for Figure 1 the side view schematic diagrams of the hub 1 shown at relative angles of 0, 45, 90, 135 and 180 degrees. As Figure 5A and Figure 5BAs shown, when the two virtual axis linkages 20 are relatively unfolded at a relative angle of 0 to 45 degrees, the two first physical axis linkages 52 (second physical axis linkages 52') rotate around their respective corresponding first rotating shafts 51 (second rotating shafts 51'), causing the first convex rods 53 (second convex rods 53') to slide within the first sliding grooves 23 (second sliding grooves 23') and pushing the first sliding rods 30 (second sliding rods 30') close to the base 10 to slide within the first limiting grooves 24 (second limiting grooves 24'). Thus, the first sliding rods 30 (second sliding rods 30') are subjected to the acting force of the first elastic members 40 (second elastic members 40') to provide additional torsion to achieve torsion compensation.
[0033] As Figures 5B to 5D shown, when the two virtual axis linkages 20 are relatively unfolded at a relative angle of 45 to 135 degrees, the first physical axis linkages 52 (second physical axis linkages 52') rotate, causing the first convex rods 53 (second convex rods 53') to slide within the first sliding grooves 23 (second sliding grooves 23') but not pushing any of the first sliding rods 30 (second sliding rods 30'). Thus, the first sliding rods 30 (second sliding rods 30') are not subjected to the acting force of the first elastic members 40 (second elastic members 40') and do not provide additional torsion, that is, there is no torsion compensation.
[0034] As Figures 5D to 5E shown, when the two virtual axis linkages 20 are relatively unfolded at a relative angle of 135 to 180 degrees, the two first physical axis linkages 52 (second physical axis linkages 52') rotate around their respective corresponding first rotating shafts 51 (second rotating shafts 51'), causing the first convex rods 53 (second convex rods 53') to slide within the first sliding grooves 23 (second sliding grooves 23') and pushing the first sliding rods 30 (second sliding rods 30') away from the base 10 to slide within the first limiting grooves 24 (second limiting grooves 24'). Thus, the first sliding rods 30 (second sliding rods 30') are subjected to the acting force of the first elastic members 40 (second elastic members 40') to provide additional torsion to achieve torsion compensation.
[0035] Since the two plate bodies of the electronic device are respectively fixedly connected to the fixing parts 26 of the two virtual axis linkages 20 of the hub 1 (which will be described later), the relative angle between the two virtual axis linkages 20 of the hub 1 is the relative angle between the two plate bodies. The present invention uses a relatively simple mechanism to achieve the torsion compensation function, and can start to provide additional torsion to achieve the torsion compensation function when the two plate bodies are relatively unfolded to a relative angle close to 180 degrees (between 135 and 180 degrees in this embodiment) or relatively folded to a relative angle close to 0 degrees (between 0 and 45 degrees in this embodiment). In this way, it can be avoided that the two plate bodies are relatively unfolded too quickly to a relative angle of 180 degrees and may collide with the tabletop and cause damage, and it can also be avoided that the two plate bodies collide with each other when they are relatively folded too quickly to a relative angle close to 0 degrees.
[0036] Please also refer to Figure 6 and Figure 7 , Figure 6 which is a perspective view of the hub 1a according to the second embodiment of the present utility model, Figure 7 and Figure 6 is a partial exploded view of the hub 1a shown in Figure 1 . Compared with the hub 1 shown in Figure 1 , the first linkage mechanism 50a of the hub 1a further includes two first gears 54 and a plurality of first idler gears 55. Each first gear 54 is fixedly sleeved on the corresponding first rotating shaft 51. The two first gears 54 are engaged through the plurality of first idler gears 55, so that the two first gears 54 rotate simultaneously in opposite directions. When the two first gears 54 rotate simultaneously in opposite directions, the two first rotating shafts 51 will rotate simultaneously in opposite directions, and then the two first solid shaft linkages 52 will rotate simultaneously in opposite directions.
[0037] The first linkage mechanism 50a further includes a first torque generating module 56. The first torque generating module 56 includes two first cam groups 57 and two first elastic member groups 58. Each first cam group 57 is coupled to the corresponding first solid shaft linkage 52. Each first elastic member group 58 abuts against the corresponding first cam group 57 and provides torque to the corresponding first solid shaft linkage 52 by pushing the corresponding first cam group 57. In this embodiment, the first cam group 57 is coupled to the first rotating shaft 51, and the first rotating shaft 51 is fixedly connected to the first solid shaft linkage 52. In this way, the torque generated by the pushing of the first cam group 57 and the first elastic member group 58 can be provided to the first solid shaft linkage 52 through the first rotating shaft 51. The first torque generating module 56 provides torque to the two first solid shaft linkages 52. The first convex rods 53 of the two first solid shaft linkages 52 are slidably connected to the first sliding grooves 23 of the two virtual shaft linkages 20 to provide the torque required for the opening and closing of the hub 1.
[0038] The second linkage mechanism 50a' further includes two second gears 54' and a plurality of second idler gears 55'. Each second gear 54' is fixedly sleeved on the corresponding second rotating shaft 51'. The two second gears 54' are engaged through the second idler gears 55', so that the two second gears 54' rotate simultaneously in opposite directions. When the two second gears 54' rotate simultaneously in opposite directions, the two second rotating shafts 51' will rotate simultaneously in opposite directions, and then the two second solid shaft linkages 52' will rotate simultaneously in opposite directions.
[0039] The second linkage mechanism 50a' further includes a second torque generation module 56'. The second torque generation module 56' includes two second cam groups 57' and two second elastic member groups 58'. Each second cam group 57' is coupled to a corresponding second solid shaft link 52'. Each second elastic member group 58' abuts against a corresponding second cam group 57' and provides torque to the corresponding second solid shaft link 52' by pressing against the corresponding second cam group 57'. In this embodiment, the second cam group 57' is coupled to the second rotating shaft 51', and the second rotating shaft 51' is fixedly connected to the second solid shaft link 52'. In this way, the torque generated by the pushing of the second cam group 57' and the second elastic member group 58' can be provided to the second solid shaft link 52' through the second rotating shaft 51'. The second torque generation module 56' provides torque to the two second solid shaft links 52', and the second convex rods 53' of the two second solid shaft links 52' are slidably connected to the second sliding grooves 23' of the two virtual shaft links 20 to provide the torque required for the opening and closing of the hub 1. In addition, in this embodiment, the first elastic member group 58 and the second elastic member group 58' are elastic pieces that can be respectively sleeved on the first rotating shaft 51 and the second rotating shaft 51'.
[0040] Please refer to Figure 8 and Figure 9 , Figure 8 which is a perspective view of the hub 1b according to the third embodiment of the present invention, Figure 9 and Figure 8 is a partial exploded view of the hub 1b shown in Figure 1 . Compared with the hub 1 shown in
[0041] Please refer to Figure 10 and Figure 11 , Figure 10 which is a perspective view of an electronic device according to an embodiment of the present invention, Figure 11 and Figure 10Partial exploded view of the electronic device shown. The electronic device includes hubs 1 and 1a, two plate bodies 2, and a screen 3. Each plate body 2 is fixedly connected to the fixing portion 26 of the corresponding virtual axis link 20 of the hub 1. The screen 3 is disposed on the two plate bodies 2; in this embodiment, the screen 3 includes two screen members 3', and the two screen members 3' are respectively disposed on the two plate bodies 2. However, this embodiment is not intended to limit the present invention. For example, the hubs 1 and 1a can be replaced with the hub 1b, or a combination of the hub 1b and the first and second linkage mechanisms. Also, for example, the screen 3 can be replaced with a flexible display member.
[0042] In summary, for the hub according to the embodiment of the present invention and the electronic device using the same, a relatively simple mechanism is used to achieve the torque compensation function, and additional torque can be provided to achieve the torque compensation function when the two plate bodies are relatively unfolded to a relative angle close to 180 degrees or relatively folded to a relative angle close to 0 degrees.
[0043] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the claims.
Claims
1. A hub, characterized in that include: The base comprises two oppositely disposed pivoting sides and two oppositely disposed mounting sides, each of the pivoting sides being provided with a first arc-shaped connecting portion; Two virtual axis connecting rods, each of which is provided with a second arc-shaped connecting portion, a first sliding groove, two first limiting grooves and a first receiving groove, the second arc-shaped connecting portion is slidably connected to the corresponding first arc-shaped connecting portion, the two first limiting grooves are connected to the first sliding groove, and the two ends of the first receiving groove are respectively connected to the two first limiting grooves; Four first sliding bars, each of which is slidably disposed in the corresponding first limiting groove and has one end extending into the corresponding first sliding groove; Two first elastic members, each of which is disposed in the corresponding first accommodating groove and has two ends extending into the corresponding two first limiting grooves to be connected to the corresponding two first sliding rods; as well as The first linkage mechanism is detachably arranged on one of the two mounting sides, and the first linkage mechanism includes two first rotating shafts and two first physical axis connecting rods, and the two first physical axis connecting rods are respectively connected to the two first rotating shafts, and each of the first physical axis connecting rods is provided with a first protrusion rod, and the first protrusion rod is slidably connected to the corresponding first sliding groove and is located between the corresponding two first sliding rods.
2. The hinge device according to claim 1, characterized in that: Each of the pivoting sides is formed with a recess, and two opposite side walls of the recess respectively form two of the first arc-shaped connecting parts; each of the virtual axis connecting rods is formed with a convex part, and two opposite side sides of the convex part respectively form two of the second arc-shaped connecting parts.
3. The hinge device according to claim 2, characterized in that: The first arc-shaped connecting portion is an arc-shaped convex rib, and the second arc-shaped connecting portion is an arc-shaped sliding groove corresponding to the arc-shaped convex rib.
4. The hinge device according to claim 1, characterized in that: The first linkage mechanism also includes two first gears and a plurality of first idler gears. Each of the first gears is fixedly sleeved on the corresponding first rotating shaft. The two first gears are meshed through the plurality of first idler gears so that the two first gears rotate simultaneously in opposite directions.
5. The hinge device according to claim 1, characterized in that: The first linkage mechanism also includes a first torque generating module, which includes two first concave cam groups and two first elastic member groups. Each of the first concave cam groups is combined with the corresponding first physical shaft connecting rod, and each of the first elastic member groups abuts against the corresponding first concave cam group and provides torque to the corresponding first physical shaft connecting rod by pushing the corresponding first concave cam group.
6. The hinge device according to claim 1, characterized in that: The two second physical axis links are respectively connected to the two second rotating shafts, and the two second physical axis links are respectively provided with a second convex rod, and the second convex rod is slidably connected to the corresponding second limiting groove and one end of the second limiting groove is extended into the corresponding second limiting groove.
7. The hinge device according to claim 6, characterized in that: Each of the virtual axis connecting rods is also provided with two connecting grooves, and the two ends of each connecting groove are respectively connected to the corresponding first limit groove and the second limit groove; the hub also includes four connecting rods, each of the connecting rods can be slidably arranged in the corresponding connecting groove and the two ends are respectively connected to the corresponding first sliding rod and the second sliding rod.
8. The hinge device according to claim 6, characterized in that: The second linkage mechanism also includes two second gears and a plurality of second idler gears. Each of the second gears is fixedly sleeved on the corresponding second rotating shaft. The two second gears are meshed through the plurality of second idler gears so that the two second gears rotate simultaneously in opposite directions.
9. The hinge device according to claim 6, characterized in that: The second linkage mechanism also includes a second torque generating module, which includes two second concave cam groups and two second elastic member groups. Each of the second concave cam groups is combined with the corresponding second physical shaft connecting rod, and each of the second elastic member groups abuts against the corresponding second concave cam group and provides torque to the corresponding second physical shaft connecting rod by pushing the corresponding second concave cam group.
10. An electronic device, characterized in that include: The hub device according to any one of claims 1 to 9; Two plates, each of which is fixedly connected to the virtual shaft connecting rod corresponding to the hub; and The screen is arranged on the two plates.