CN116225162A - Rotating shaft mechanism, electronic equipment and opening and closing control method of electronic equipment - Google Patents

Abstract

The application discloses pivot mechanism, electronic equipment and electronic equipment's control method that opens and shuts, pivot mechanism includes pivot subassembly and drive assembly, drive assembly includes driving motor, driving motor's output is connected with the pivot subassembly transmission in order to drive pivot subassembly and open and shut the operation, driving motor's output is equipped with brake structure, brake structure's both sides are equipped with permanent magnet and electro-magnet respectively, the electro-magnet includes the coil and is located the inside iron core of coil, when the electro-magnet was not circular telegram, permanent magnet and iron core mutual attraction make brake structure pressed from both sides tight between permanent magnet and iron core, when the positive circular telegram of electro-magnet, the iron core produces the force that repels mutually with the permanent magnet makes iron core and permanent magnet keep away from each other and release brake structure. According to the method and the device, the screen end of the electronic equipment is not required to be manually and directly moved, and different choices can be provided for the user.

Description

Rotating shaft mechanism, electronic equipment and opening and closing control method of electronic equipment

Technical Field

The application relates to the technical field of rotating shafts, in particular to a rotating shaft mechanism, electronic equipment and an opening and closing control method of the electronic equipment.

Background

In order to realize the unfolding and the covering of the screen end, a rotating shaft mechanism is arranged between the screen end and the system end of the notebook computer. At present, a rotating shaft mechanism between a screen end and a system end is basically of a pure mechanical structure, and when the screen end is unfolded, the screen end is covered and the unfolding angle is adjusted, the screen end is required to be manually and directly moved by a user to realize the operation, so that different choices cannot be provided for the user.

Disclosure of Invention

The purpose of the application is to provide a rotating shaft mechanism, which does not need to manually and directly move the screen end of the electronic equipment and can provide different choices for users.

Another object of the present application is to provide an electronic device that can provide different options to a user without having to manually move the screen end of the electronic device directly.

Still another object of the present invention is to provide an opening and closing control method of an electronic device, which can provide different choices for a user without manually and directly moving a screen end of the electronic device.

In order to achieve the above-mentioned purpose, the application provides a pivot mechanism, including pivot subassembly and drive assembly, drive assembly includes driving motor, driving motor's output with the pivot subassembly transmission is connected in order to drive the pivot subassembly opens and shuts the operation, driving motor's output is equipped with brake structure, brake structure's both sides are equipped with permanent magnet and electro-magnet respectively, the electro-magnet includes the coil and is located the inside iron core of coil, when the electro-magnet is not circular telegram, permanent magnet with the iron core looks attraction makes brake structure is pressed from both sides tight permanent magnet with between the iron core, when the positive circular telegram of electro-magnet, the iron core produce with the repulsive force of permanent magnet looks makes the iron core with the permanent magnet is kept away from each other and releases brake structure.

Optionally, the output end of the driving motor is provided with a rotating shaft, the braking structure is a brake disc, and the brake disc is coaxially arranged on the rotating shaft.

Optionally, the brake disc is provided with a plurality of through holes along the circumferential direction thereof, and the permanent magnet and the electromagnet are arranged corresponding to the through holes.

Optionally, the permanent magnet is installed in a first limiting shell, and the first limiting shell is fixedly arranged; the first limit housing is provided with a first limit groove which is opened towards the brake disc, and the permanent magnet is movably arranged in the first limit groove so as to be attracted to move towards the brake disc or be repelled to move back towards the brake disc.

Optionally, the electromagnet is installed in a second limiting shell, and the second limiting shell is fixedly arranged; the second limiting shell is provided with a second limiting groove facing the opening of the brake disc, the electromagnet is installed in the second limiting groove, the lead wire of the coil extends out of the second limiting groove, and the iron core is movably installed in the second limiting groove so as to be capable of being attracted to move towards the brake disc or capable of being repelled to move back to the brake disc.

Optionally, the first limit shell is fixedly connected with the second limit shell; the rotating shaft mechanism further comprises a mounting seat, and the driving motor, the first limiting shell and the second limiting shell are fixedly mounted on the mounting seat.

Optionally, the output end of the driving motor is connected with a first gear; the rotating shaft assembly comprises a rotating shaft, and the first gear is in transmission connection with the rotating shaft through a gear set; the gear set comprises a second gear meshed with the first gear and a third gear coaxially arranged on the rotating shaft, and the first gear drives the gear set to rotate when rotating so as to drive the rotating shaft to rotate.

In order to achieve the above another object, the present application provides an electronic device, including a screen end and a system end, where the screen end and the system end are rotatably connected through a spindle mechanism as described above.

In order to achieve the above object, the present application provides an opening and closing control method of the above electronic device, including:

setting a first delayer, a second delayer, a third delayer, a fourth delayer, a first timer, a second timer, a third timer and a fourth timer;

when the electronic equipment is started, a power key of the electronic equipment is operated in a first operation mode, the first time delay device, the second time delay device, the first time delay device and the second time delay device respectively start to time, the driving motor is controlled to rotate forwards when the first time delay device delays for a first preset time period, the electromagnet is controlled to be electrified forwards when the second time delay device delays for a second preset time period, the iron core and the permanent magnet release the brake structure, the screen end starts to overturn, the driving circuit of the driving motor is disconnected when the first time delay device clocks for a third preset time period, the power supply circuit of the electromagnet is disconnected when the second time delay device clocks for a fourth preset time period, the iron core and the permanent magnet clamp the brake structure, the screen end overturn to a first angle, the fourth preset time period is longer than or equal to the third preset time period, the third preset time period is longer than the second preset time period, and the second preset time period is longer than or equal to the first preset time period.

Optionally, when the screen end is in an unfolding state, the power key is operated in a second operation mode, the third delayer, the fourth delayer, the third timer and the fourth timer respectively start to count, when the third delayer delays for a fifth preset time period, the driving motor is controlled to rotate positively, when the fourth delayer delays for a sixth preset time period, the electromagnet is controlled to be electrified positively, the iron core and the permanent magnet release the braking structure, the screen end is unfolded further, when the third timer counts for a seventh preset time period, the driving circuit of the driving motor is disconnected, when the fourth timer counts for an eighth preset time period, the power supply circuit of the electromagnet is disconnected, the iron core and the permanent magnet clamp the braking structure, when the eighth preset time period is longer than or equal to the seventh preset time period, the seventh preset time period is longer than the sixth preset time period, and when the sixth preset time period is longer than or equal to the fifth preset time period, and the fifth preset time period is longer than the fifth preset time period;

when the screen end is in an unfolding state, the power key is operated in a third operation mode, the third time delay device, the fourth time delay device, the third time delay device and the fourth time delay device start to count respectively, the third time delay device controls the driving motor to rotate reversely when in a fifth preset time period, the fourth time delay device controls the electromagnet to be electrified forward when in a sixth preset time period, the iron core and the permanent magnet release the braking structure, the unfolding angle of the screen end is reduced, the third time delay device counts the seventh preset time period, the driving circuit of the driving motor is disconnected, the power supply circuit of the electromagnet is disconnected when the fourth time delay device counts the eighth preset time period, and the iron core and the permanent magnet clamp the braking structure.

The rotating shaft mechanism can utilize the driving motor to drive the rotating shaft assembly, so that the rotating shaft assembly can drive the screen end to be unfolded, covered and the unfolding angle to be adjusted, and further the unfolding, covering and the unfolding angle to be adjusted of the screen end can be achieved without manually and directly moving the screen end of the electronic equipment by a user, so that different choices are provided for the user. In addition, this application is equipped with brake structure at drive motor's output, and is equipped with permanent magnet and electro-magnet respectively in brake structure's both sides, when the positive circular telegram of electro-magnet, iron core and permanent magnet can keep away from each other in order to release brake structure, and then make drive motor can normally drive pivot subassembly, and when the electro-magnet is not circular telegram, permanent magnet and iron core attraction each other make brake structure pressed from both sides tightly between permanent magnet and iron core, and then can play the effect of braking, are favorable to guaranteeing that the screen end keeps in current position.

Drawings

Fig. 1 is a schematic perspective view of a spindle mechanism according to an embodiment of the present application.

Fig. 2 is a schematic perspective view of another embodiment of a hinge mechanism according to the present application, wherein a part of the structure is hidden.

Fig. 3 is a schematic perspective view of the permanent magnet, the electromagnet, the first limiting housing and the second limiting housing according to the embodiment of the present application.

Fig. 4 is a schematic perspective view of an electronic device according to an embodiment of the present application.

Fig. 5 is a schematic block diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the present application in detail, the following description is made in connection with the embodiments and the accompanying drawings.

Referring to fig. 1 to 4, an embodiment of the present application discloses a rotation shaft mechanism, which is used for being connected between a screen end 1 and a system end 2 of an electronic device, so that the screen end 1 can be unfolded, covered or unfolded with respect to the system end 2. The rotating shaft mechanism comprises a rotating shaft assembly 3 and a driving assembly 4, the driving assembly 4 comprises a driving motor 40, and the output end of the driving motor 40 is in transmission connection with the rotating shaft assembly 3 to drive the rotating shaft assembly 3 to open and close. The rotating shaft assembly 3 is driven by the driving motor 40, so that the rotating shaft assembly 3 can drive the screen end 1 to be unfolded, covered and the unfolding angle to be adjusted, and the unfolding, covering and unfolding angle adjustment of the screen end 1 can be realized without directly moving the screen end 1 manually by a user, so that different choices are provided for the user.

The output end of the driving motor 40 is provided with a braking structure, two sides of the braking structure are respectively provided with a permanent magnet 50 and an electromagnet 60, the electromagnet 60 comprises a coil 61 and an iron core 62 positioned in the coil 61, when the electromagnet 60 is not electrified, the permanent magnet 50 and the iron core 62 are attracted to each other so that the braking structure is clamped between the permanent magnet 50 and the iron core 62, and when the electromagnet 60 is electrified in the forward direction, the iron core 62 generates a repulsive force with the permanent magnet 50 so that the iron core 62 and the permanent magnet 50 are separated from each other so as to release the braking structure. When the electromagnet 60 is not electrified, the permanent magnet 50 and the iron core 62 can attract each other to clamp the braking structure between the permanent magnet 50 and the iron core 62, so that the braking effect can be achieved, and the screen end 1 can be kept at the current position.

In some embodiments, the output end of the drive motor 40 has a rotating shaft 41, the braking structure is a brake disc 70, and the brake disc 70 is coaxially disposed on the rotating shaft 41. Because the braking structure is the brake disc 70 coaxially arranged on the rotating shaft 41, reliable braking is facilitated by the permanent magnet 50 and the electromagnet 60.

Specifically, the free end of the rotating shaft 41 is mounted on a side wall 82 of a mounting base 80, thereby facilitating stable rotation of the rotating shaft 41.

It should be noted that the rotation shaft 41 is not particularly limited as long as it is located at the output end of the drive motor 40.

Specifically, the brake disc 70 is provided with a plurality of through holes 71 distributed along the circumferential direction thereof, and the permanent magnet 50 and the electromagnet 60 are disposed corresponding to the through holes 71, i.e., the permanent magnet 50 and the electromagnet 60 always face the through holes 71 on the brake disc 70 when the brake disc 70 is stopped. By providing the through hole 71, the permanent magnet 50 and the electromagnet 60 can have better penetration force.

Specifically, the permanent magnet 50 is installed in the first limit housing 51, and the first limit housing 51 is fixedly provided. The first stopper housing 51 is provided with a first stopper groove 511 opened toward the brake disc 70, and the permanent magnet 50 is movably installed in the first stopper groove 511 so as to be capable of being attracted to move toward the brake disc 70 or capable of being repelled to move away from the brake disc 70. By providing the first limiting housing 51, the permanent magnet 50 can be limited, and the permanent magnet 50 can be stably engaged with the electromagnet 60 to clamp the brake disc 70 or release the brake disc 70.

Specifically, the electromagnet 60 is mounted in the second limiting housing 63, and the second limiting housing 63 is fixedly disposed. The second limit housing 63 is provided with a second limit groove 631 opening toward the brake disc 70, and the electromagnet 60 is mounted in the second limit groove 631, wherein the lead wire 611 of the coil 61 protrudes from the second limit groove 631, and the iron core 62 is movably mounted in the second limit groove 631 so as to be capable of being attracted to move toward the brake disc 70 or capable of being repelled to move away from the brake disc 70. By providing the second limiting case 63, the electromagnet 60 can be limited, and the electromagnet 60 can be stably engaged with the permanent magnet 50 to clamp the brake disc 70 or release the brake disc 70.

Further, the first limit housing 51 and the second limit housing 63 are fixedly connected. The spindle mechanism further includes a mounting base 80, and the driving motor 40, the first limiting housing 51, and the second limiting housing 63 are fixedly mounted on the mounting base 80. Because the first limiting shell 51 and the second limiting shell 63 are fixedly connected, and the driving motor 40, the first limiting shell 51 and the second limiting shell 63 are fixedly installed on the same installation seat 80, the relative positions of the driving motor 40, the first limiting shell 51 and the second limiting shell 63 can be ensured to be stable.

In a specific example, one of the first limiting housing 51 and the second limiting housing 63 is provided with a positioning hole 632, and the other is provided with a positioning column 512 matched with the positioning hole 632, so that the positioning hole 632 and the positioning column 512 are matched, and quick assembly of the two is facilitated. After the positioning is completed by the positioning holes 632 and the positioning posts 512, the first and second spacing housings 51 and 63 are fixed together by the fasteners a. In addition, the bottom wall 83 of the mounting seat 80 is provided with a positioning column 831 in a protruding manner, positioning holes 513 and 633 are formed at the bottoms of the first and second limiting cases 51 and 63, respectively, and by means of the cooperation of the positioning holes 513 and 633 and the positioning column 831, the first and second limiting cases 51 and 63 can be accurately positioned on the bottom wall 83 of the mounting seat 80, and after positioning, the first and second limiting cases 51 and 63 are fixed on the bottom wall 83 of the mounting seat 80 by using the fastener B. The main body 42 of the driving motor 40 is covered with the upper cover body 43, two ends of the cover body 43 are provided with lug parts 431 attached to the bottom wall 83, the lug parts 431 are provided with positioning holes 432, the bottom wall 83 is provided with positioning posts 832, the driving motor 40 can be rapidly positioned through the cooperation of the positioning holes 432 and the positioning posts 832, and then the driving motor 40 is fixed on the bottom wall by using the fastener C.

In some embodiments, a first gear 45 is connected to the output of the drive motor 40. The rotating shaft assembly 3 comprises a rotating shaft 31, and the first gear 45 is in transmission connection with the rotating shaft 31 through the gear set 9. The gear set 9 includes a second gear 91 meshed with the first gear 45 and a third gear 92 coaxially arranged on the rotating shaft 31, and when the first gear 45 rotates, the gear set 9 is driven to rotate so as to drive the rotating shaft 31 to rotate. It will be appreciated that the gear set 9 is not limited to a particular form and may be capable of serving as a transmission. The drive motor 40 is not limited to the drive of the rotation shaft 31 by the gear set 9, and may be of another structure that can function as a transmission.

Specifically, the mounting base 80 includes a first side wall 81 and a second side wall 82, one end of the rotating shaft 31 is mounted on the first side wall 81 and extends from the first side wall 81, the third gear 92 is coaxially disposed at a position where the rotating shaft 31 extends from the first side wall 81, the second gear 91 is coaxially disposed on a connecting shaft 93, and two ends of the connecting shaft 93 are mounted on the first side wall 81 and the second side wall 82, respectively.

Specifically, a first bracket 32 is fixedly connected to the rotating shaft 31, and a second bracket 33 is movably connected to the rotating shaft, and the rotating shaft is connected to the system end 2 and the screen end 1 through the first bracket 32 and the second bracket 33.

In the specific example, the spindle assembly 3 includes only one spindle 31. However, in the present application, the shaft assembly 3 is not limited to the above-described form, as long as it can be driven by the drive motor 40.

Referring to fig. 1 to 4, the application further discloses an electronic device, which includes a screen end 1 and a system end 2, wherein the screen end 1 and the system end 2 are rotatably connected through a rotating shaft mechanism as described above.

The rotating shaft mechanism can utilize the driving motor 40 to drive the rotating shaft assembly 3, so that the rotating shaft assembly 3 can drive the screen end 1 to be unfolded, covered and the angle to be unfolded to be adjusted, and further the user does not need to manually and directly move the screen end 1 of the electronic equipment to realize the unfolding, covering and angle adjustment of the screen end 1, so that different choices are provided for the user. In addition, this application is equipped with brake structure at the output of driving motor 40, and be equipped with permanent magnet 50 and electro-magnet 60 respectively in brake structure's both sides, when electro-magnet 60 forward circular telegram, iron core 62 and permanent magnet 50 can keep away from each other in order to release brake structure, and then make driving motor 40 can normally drive pivot subassembly 3, and when electro-magnet 60 does not circular telegram, permanent magnet 50 and iron core 62 mutual attraction make brake structure pressed from both sides tightly between permanent magnet 50 and iron core 62, and then can play the effect of braking, be favorable to guaranteeing that screen end 1 keeps in current position.

Referring to fig. 5, the application further discloses an opening and closing control method of the electronic device, including:

the first delay timer 101, the second delay timer 102, the third delay timer 103, the fourth delay timer 104, the first timer 201, the second timer 202, the third timer 203, and the fourth timer 204 are provided. The first delayer 101, the second delayer 102, the third delayer 103, the fourth delayer 104, the first timer 201, the second timer 202, the third timer 203, the fourth timer 204, the driving circuit 300 of the driving motor 40 and the power supply circuit 400 of the electromagnet 60 are all connected with the control module 500 for control.

When the electronic device is started, the power key of the electronic device is operated in the first operation mode, the first delayer 101, the second delayer 102, the first timer 201 and the second timer 202 start to count respectively (when the power key is operated, the delayer and the timer start to count immediately), when the first delayer 101 delays for a first preset time period, the electronic device enters a starting state (the power key can not be operated any more), the driving motor 40 is controlled to rotate positively, when the second delayer 102 delays for a second preset time period, the electromagnet 60 is controlled to be electrified positively, the iron core 62 and the permanent magnet 50 release the braking structure, the screen end 1 starts to overturn, when the first timer 201 counts for a third preset time period, the driving circuit 300 of the driving motor 40 is disconnected, when the second timer 202 counts for a fourth preset time period, the power circuit 400 of the electromagnet 60 is disconnected, the iron core 62 and the permanent magnet 50 clamp the braking structure, when the screen end 1 is overturned to a first angle, when the fourth preset time period is longer than or equal to the third preset time period, when the third preset time period is longer than the second preset time period is longer than the first preset time period.

Specifically, the first operation mode may be that the power key is pressed, for example, the first preset duration may be 1 second, and in the case that the long pressing of the power key satisfies the 1 second timing of the first delayer 101, the electronic device determines to enter the on state. The second preset time period may be selected to be slightly longer than the first preset time period, such as 1.5 seconds. The third preset time period is required to give the driving motor 40 a driving time period sufficient for the screen end 1 to be unfolded to a certain angle, such as 135 degrees.

Further, when the screen end 1 is unfolded to a certain angle after being started up, or when the screen end 1 is at other unfolding angles, the angle adjustment of the screen end 1 can be performed in the following manner:

the power key is operated in the second operation mode, the third delayer 103, the fourth delayer 104, the third timer 203 and the fourth timer 204 respectively start timing (when the power key is operated, the power supply starts timing immediately), when the third delayer 103 delays for a fifth preset time period, the driving motor 40 is controlled to rotate forward, when the fourth delayer 104 delays for a sixth preset time period, the electromagnet 60 is controlled to be electrified forward, the iron core 62 and the permanent magnet 50 release the braking structure, the screen end 1 is further unfolded, when the third timer 203 clocks for a seventh preset time period, the driving circuit 300 of the driving motor 40 is disconnected, when the fourth timer 204 clocks for an eighth preset time period, the power supply circuit 400 of the electromagnet 60 is disconnected, the iron core 62 and the permanent magnet 50 clamp the braking structure, the eighth preset time period is greater than or equal to the seventh preset time period, the seventh preset time period is greater than the sixth preset time period, the sixth preset time period is greater than or equal to the fifth preset time period, and the fifth preset time period is less than the first preset time period.

When the screen end 1 is in the unfolding state, the power key is operated in a third operation mode, the third delayer 103, the fourth delayer 104, the third timer 203 and the fourth timer 204 start to count respectively, the third delayer 103 delays for a fifth preset duration, the driving motor 40 is controlled to reversely rotate, the fourth delayer 104 delays for a sixth preset duration, the electromagnet 60 is controlled to be electrified positively, the iron core 62 and the permanent magnet 50 release the braking structure, the screen end 1 reduces the unfolding angle, the driving circuit 300 of the driving motor 40 is disconnected when the third timer 203 counts for a seventh preset duration, the fourth timer 204 counts for an eighth preset duration, the power supply circuit 400 of the electromagnet 60 is disconnected, and the iron core 62 and the permanent magnet 50 clamp the braking structure.

In particular, the second mode of operation may be to toggle the power key to one side and the third mode of operation may be to toggle the power key to the other side. For example, the fifth preset time period may be set to 0.3 seconds, and when the user dials the power key to one side or the other side and keeps the operation, if the third delayer 103 counts to 0.3 seconds, that is, controls the driving motor 40 to rotate forward or backward, and if the count is less than 0.3 seconds, the user is considered to operate by mistake. The sixth preset time period may be set to 0.4 seconds, and the fourth delayer 104 is controlled to energize the electromagnet 60 in the forward direction when the delay time reaches 0.4 seconds after the driving motor 40 is started. The seventh preset time period and the eighth preset time period may be set to 0.7 seconds, and the driving circuit 300 of the driving motor 40 is turned off when the third timer 203 counts up to 0.7 seconds, and the power supply circuit 400 of the electromagnet 60 is turned off when the fourth timer 204 counts up to 0.7 seconds.

As can be seen from the above, after the screen end 1 is opened to a certain angle by using the first operation mode, if the angle needs to be further adjusted, the expansion angle can be adjusted by using the second operation mode or the third operation mode.

When it is desired to fully cover the screen end 1 in the unfolded state, the power key can be operated in the first operation mode, mainly except that the driving motor 40 needs to be controlled to be reversed.

The foregoing disclosure is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the claims herein, as the terms of the equivalents of the claims are to be construed as in a manner consistent with the scope of the claims herein.

Claims (10)

1. The utility model provides a pivot mechanism, its characterized in that includes pivot subassembly and drive assembly, drive assembly includes driving motor, driving motor's output with the pivot subassembly transmission is connected in order to drive the pivot subassembly opens and shuts the operation, driving motor's output is equipped with brake structure, brake structure's both sides are equipped with permanent magnet and electro-magnet respectively, the electro-magnet includes the coil and is located the inside iron core of coil, when the electro-magnet is not circular telegram, permanent magnet with the iron core mutual attraction makes brake structure is pressed from both sides tight permanent magnet with between the iron core, when the electro-magnet is positive circular telegram, the iron core produce with the repulsive force of permanent magnet iron makes the iron core with the permanent magnet is kept away from each other and releases brake structure.

2. The spindle mechanism according to claim 1, wherein,

the output end of the driving motor is provided with a rotating shaft, the braking structure is a brake disc, and the brake disc is coaxially arranged on the rotating shaft.

3. The spindle mechanism according to claim 2, wherein,

the brake disc is provided with a plurality of through holes along the circumferential direction, and the permanent magnet and the electromagnet are arranged corresponding to the through holes.

4. The spindle mechanism according to claim 2, wherein,

the permanent magnet is arranged in a first limiting shell, and the first limiting shell is fixedly arranged;

the first limit housing is provided with a first limit groove which is opened towards the brake disc, and the permanent magnet is movably arranged in the first limit groove so as to be attracted to move towards the brake disc or be repelled to move back towards the brake disc.

5. The spindle mechanism as recited in claim 4, wherein,

the electromagnet is arranged in the second limiting shell, and the second limiting shell is fixedly arranged;

the second limiting shell is provided with a second limiting groove facing the opening of the brake disc, the electromagnet is installed in the second limiting groove, the lead wire of the coil extends out of the second limiting groove, and the iron core is movably installed in the second limiting groove so as to be capable of being attracted to move towards the brake disc or capable of being repelled to move back to the brake disc.

6. The spindle mechanism as recited in claim 5, wherein,

the first limit shell is fixedly connected with the second limit shell;

the rotating shaft mechanism further comprises a mounting seat, and the driving motor, the first limiting shell and the second limiting shell are fixedly mounted on the mounting seat.

7. The spindle mechanism according to claim 1, wherein,

the output end of the driving motor is connected with a first gear;

the rotating shaft assembly comprises a rotating shaft, and the first gear is in transmission connection with the rotating shaft through a gear set;

the gear set comprises a second gear meshed with the first gear and a third gear coaxially arranged on the rotating shaft, and the first gear drives the gear set to rotate when rotating so as to drive the rotating shaft to rotate.

8. An electronic device comprising a screen end and a system end, the screen end and the system end being rotatably connected by a spindle mechanism according to any one of claims 1 to 7.

9. The method for controlling opening and closing of an electronic device according to claim 8, wherein,

setting a first delayer, a second delayer, a third delayer, a fourth delayer, a first timer, a second timer, a third timer and a fourth timer;

when the electronic equipment is started, a power key of the electronic equipment is operated in a first operation mode, the first time delay device, the second time delay device, the first time delay device and the second time delay device respectively start to time, the driving motor is controlled to rotate forwards when the first time delay device delays for a first preset time period, the electromagnet is controlled to be electrified forwards when the second time delay device delays for a second preset time period, the iron core and the permanent magnet release the brake structure, the screen end starts to overturn, the driving circuit of the driving motor is disconnected when the first time delay device clocks for a third preset time period, the power supply circuit of the electromagnet is disconnected when the second time delay device clocks for a fourth preset time period, the iron core and the permanent magnet clamp the brake structure, the screen end overturn to a first angle, the fourth preset time period is longer than or equal to the third preset time period, the third preset time period is longer than the second preset time period, and the second preset time period is longer than or equal to the first preset time period.

10. The method for controlling opening and closing of an electronic device according to claim 9, wherein,

when the screen end is in an unfolding state, the power key is operated in a second operation mode, the third time delay device, the fourth time delay device, the third time delay device and the fourth time delay device respectively start to time, the third time delay device controls the driving motor to rotate forwards when in a fifth preset time period, the fourth time delay device controls the electromagnet to be electrified forward when in a sixth preset time period, the iron core and the permanent magnet release the brake structure, the screen end is further unfolded, the third time delay device cuts off the driving circuit of the driving motor when in a seventh preset time period, the fourth time delay device cuts off the power supply circuit of the electromagnet when in an eighth preset time period, the iron core and the permanent magnet clamp the brake structure, the eighth preset time period is longer than the seventh preset time period, the seventh preset time period is longer than the sixth preset time period, the sixth preset time period is longer than the fifth preset time period, and the fifth preset time period is shorter than the fifth preset time period;

when the screen end is in an unfolding state, the power key is operated in a third operation mode, the third time delay device, the fourth time delay device, the third time delay device and the fourth time delay device start to count respectively, the third time delay device controls the driving motor to rotate reversely when in a fifth preset time period, the fourth time delay device controls the electromagnet to be electrified forward when in a sixth preset time period, the iron core and the permanent magnet release the braking structure, the unfolding angle of the screen end is reduced, the third time delay device counts the seventh preset time period, the driving circuit of the driving motor is disconnected, the power supply circuit of the electromagnet is disconnected when the fourth time delay device counts the eighth preset time period, and the iron core and the permanent magnet clamp the braking structure.

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