WO2020151503A1

WO2020151503A1 - Extendable mechanism and electronic apparatus

Info

Publication number: WO2020151503A1
Application number: PCT/CN2020/071399
Authority: WO
Inventors: 黄志东
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-01-23
Filing date: 2020-01-10
Publication date: 2020-07-30
Also published as: CN111479037B; CN111479037A

Abstract

Disclosed are an extendable mechanism and an electronic apparatus. The extendable mechanism comprises a frame and an accommodation recess accommodating the frame. An extension and retraction drive component is provided inside the accommodation recess. The extension and retraction drive component comprises an electromagnet. The extendable mechanism controls the frame to extend from or retract into the accommodation recess by controlling a current direction of the electromagnet.

Description

Telescopic mechanism and electronic equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201910062981.5 on January 23, 2019. The entire content of the application is incorporated into this application by reference.

Technical field

This application relates to electronic equipment manufacturing technology, for example, to a telescopic mechanism and electronic equipment.

Background technique

As consumers gradually increase the appearance requirements of mobile terminal products, mobile terminal products with a larger screen ratio are more popular. However, the front camera usually occupies the screen display area of the mobile terminal product. In order to reduce or completely eliminate the occupation of the screen display area by the front camera, a pop-up camera structure is adopted in related technologies. However, the pop-up camera structure is usually driven by a micro precision stepping motor, a precision micro gear reduction mechanism, and a precision micro screw transmission structure, which are relatively complex and costly to implement.

Summary of the invention

The embodiments of the present invention provide a telescopic mechanism and electronic equipment, which can reduce the cost and realize the extension of the hidden mechanism with higher reliability.

The embodiment of the present invention provides a telescopic mechanism. The telescopic mechanism includes a bracket and an accommodating slot for accommodating the bracket. The accommodating slot is provided with a telescopic drive component, and the telescopic drive component includes an electromagnet and a controller. The controller is configured to control the bracket to extend or retract into the accommodating slot by controlling the current direction of the electromagnet.

An embodiment of the present invention also provides an electronic device, the electronic device includes a housing and the above-mentioned telescopic mechanism; the accommodating groove is located at the opening of the housing.

Description of the drawings

Figure 1 is a schematic diagram of an embodiment of the present invention when the terminal is not extended;

Fig. 2 is a schematic diagram of the terminal according to the embodiment of the present invention when the support is extended.

detailed description

First embodiment

The embodiment of the present invention provides a telescopic mechanism. The telescopic mechanism includes a bracket and an accommodating slot for accommodating the bracket. The bracket can extend out of the accommodating slot and can also be retracted and hidden in the container. The housing groove; the housing groove is also provided with a telescopic drive component that drives the bracket to extend or retract the housing groove; the telescopic drive component includes an electromagnet and a controller, the The controller is configured to control the bracket to extend or retract into the accommodating slot by controlling the current direction of the electromagnet. It can be seen that, in the telescopic mechanism provided by the embodiment of the present invention, the telescopic power comes from the electromagnet. The electromagnet occupies a small space and is simple to control. Compared with the pop-up structure driven by a compact stepper motor, no precision stepper motor or deceleration mechanism is required And the precision transmission structure can reduce the cost, and can realize the extension of the hidden mechanism with higher reliability.

It should be noted that the term "first\second\third" involved in the embodiment of the present invention only distinguishes similar objects, and does not represent a specific order for objects. Understandably, "first\second\third" "Three" can be interchanged in a specific order or sequence when permitted. It should be understood that the objects distinguished by "first\second\third" can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

As an implementation manner, the telescopic drive component includes a first movable magnet fixed on the bracket and two fixed magnets fixed in the accommodating groove, and the first movable magnet is located in the two Between the fixed magnets; the first movable magnet is an electromagnet, and/or, the two fixed magnets are electromagnets. The controller is configured to move the first movable magnet by controlling the current direction of the first movable magnet and/or the two fixed magnets as the electromagnet, and drive the bracket to extend The containing groove or retract the containing groove. In one example, when the telescopic mechanism is located on the top of the housing of the electronic device, the heights of the two fixed magnets are different.

In practical applications, the controller can be a specific integrated circuit (Application Specific Integrated Circuit, ASIC), a digital signal processor (Digital Signal Processor, DSP), a digital signal processing device (Digital Signal Processing Device, DSPD), and a programmable logic device. At least one of (Programmable Logic Device, PLD), Field Programmable Gate Array (Field Programmable Gate Array, FPGA), Central Processing Unit (CPU), controller, microcontroller, and microprocessor.

It is understandable that when the current direction of the electromagnet is changed, the magnetic poles of the electromagnet will be reversed. In this way, the direction of the interaction force between the first movable magnet and the fixed magnet will change, and further, the first movable magnet Under the action of the attractive and/or repulsive force of the fixed magnet, it will move, thereby driving the bracket to move; the electromagnet is only a kind of electromagnet that generates magnetic attraction with electricity, and does not have moving parts such as push rods. The telescopic drive component has a simple structure, convenient control and low cost.

The three implementations of the first movable magnet and the two fixed magnets are exemplarily described below.

Way 1:

Both the first movable magnet and the two fixed magnets are electromagnets, and the two fixed magnets include a first fixed magnet and a second fixed magnet. For example, when the heights of the two fixed magnets are different, the two fixed magnets include a first fixed magnet and a second fixed magnet arranged from top to bottom.

The controller is configured to control the current direction of the first movable magnet and/or the two fixed magnets, so that the first movable magnet and the first fixed magnet generate attraction force, and the first movable magnet and the second fixed magnet generate repulsive force. The first movable magnet moves under the combined action of the attraction force generated by the first fixed magnet and the repulsive force generated by the second fixed magnet, and drives the bracket to extend out of the containing slot.

Alternatively, the controller is configured to control the current direction of the first movable magnet and/or the two fixed magnets to cause the first movable magnet and the first fixed magnet to generate a repulsive force, and to cause the first movable magnet and the second fixed magnet to attract force. The first movable magnet moves under the combined action of the repulsive force generated by the first fixed magnet and the attractive force generated by the second fixed magnet, and drives the bracket to retract into the containing groove.

That is to say, when the movement direction of the bracket is realized by adopting mode 1, it can be realized by adjusting the current direction of the two fixed magnets, or by adjusting the current direction of the first movable electromagnet.

Way 2:

The first movable magnet is an electromagnet, the two fixed magnets are both permanent magnets, and the two fixed magnets include a first fixed magnet and a second fixed magnet. For example, when the heights of the two fixed magnets are different, the two fixed magnets include a first fixed magnet and a second fixed magnet arranged from top to bottom.

The controller is configured to control the current direction of the first movable magnet to cause the first movable magnet and the first fixed magnet to generate attractive force, and to cause the first movable magnet and the second fixed magnet to generate a repulsive force. The first movable magnet moves under the combined action of the attraction force generated by the first fixed magnet and the repulsive force generated by the second fixed magnet, and drives the bracket to extend out of the containing slot.

Alternatively, the controller is configured to control the current direction of the first movable magnet to cause the first movable magnet and the first fixed magnet to generate a repulsive force, and to cause the first movable magnet and the second fixed magnet to generate attractive force. The first movable magnet moves under the combined action of the repulsive force generated by the first fixed magnet and the attractive force generated by the second fixed magnet, and drives the bracket to retract into the containing groove.

Way 3:

The first movable magnet is a permanent magnet, the two fixed magnets are both electromagnets, and the two fixed magnets include a first fixed magnet and a second fixed magnet. For example, when the heights of the two fixed magnets are different, the two fixed magnets include a first fixed magnet and a second fixed magnet arranged from top to bottom.

The controller is configured to control the current directions of the two fixed magnets, so that the first movable magnet and the first fixed magnet generate attractive forces, and the first movable magnet and the second fixed magnet generate repulsive forces. The first movable magnet moves under the combined action of the attraction force generated by the first fixed magnet and the repulsive force generated by the second fixed magnet, and drives the bracket to extend out of the containing slot.

Alternatively, the controller is configured to control the current directions of the two fixed magnets, so that the first movable magnet and the first fixed magnet generate a repulsive force, and the first movable magnet and the second fixed magnet generate attractive force. The first movable magnet moves under the combined action of the repulsive force generated by the first fixed magnet and the attractive force generated by the second fixed magnet, and drives the bracket to retract into the containing groove.

As an implementation manner, the first movable magnet and the two fixed magnets are aligned with each other. That is, the interaction forces between the first movable magnet and the two fixed magnets are on the same straight line. In this way, driven by the interaction force of the first movable magnet and the two fixed magnets, more driving force can be generated on the bracket, thereby making it easier to realize the extension or retraction of the bracket.

In an embodiment, the telescopic drive component may further include a second movable magnet fixed on the bracket, and two stop magnets fixed in the accommodating groove, the second movable magnet is located between the two stop magnets; The stop magnets all generate attractive force to the second movable magnet. In the embodiment of the present invention, during the entire process of extending or retracting the bracket, the magnetic poles of the second movable magnet and the above-mentioned two stop magnets do not change, which can ensure that the two stop magnets always generate the second movable magnet. Attractive. In practical applications, both the second movable magnet and the two stop magnets may be permanent magnets, or both the second movable magnet and the two stop magnets may be electromagnets. In an example of the embodiment of the present invention, the second movable magnet and the two stop magnets are aligned with each other. That is, the interaction force between the second movable magnet and the two stop magnets is located on the same straight line.

When the bracket extends out of the accommodating slot, the second movable magnet is attracted to one of the two stopping magnets to stop the bracket from moving; while the bracket is retracted into the accommodating slot, The second movable magnet is attracted to the other of the two stop magnets to stop the movement of the bracket. Through the arrangement of two stop magnets, the bracket can be prevented from over-extending or over-retracting.

In the embodiment of the present invention, the main functions of the stop magnet may include: 1) the end position for restricting the movement of the bracket; 2) when the electromagnet is powered off, the bracket is kept in the original position. In one embodiment, for the above method 1, after all the electromagnets are powered off, additional permanent magnets need to be used to maintain the position, so as to avoid the electromagnets from always being energized. At this time, through the arrangement of two stop magnets, the bracket can be kept in the original position after the electromagnet is powered off. For the above methods 2 and 3, because usually electromagnets have iron cores, even if the power is off, the permanent magnets can be attracted to the iron core of the electromagnets, thereby maintaining the position of the bracket, that is, for the above Modes 2 and 3 do not require the setting of a stop magnet, and the function of maintaining the position of the bracket can also be achieved through the first movable magnet and the two fixed magnets.

As an implementation of the embodiment of the present invention, in some cases, other structures can be used instead of the stop magnet to limit the end position of the stent movement; for example, a limit block can be used to limit the end position of the stent movement.

As an implementation manner, when the heights of the two stop magnets are different, the height difference of the two stop magnets is less than or equal to the height difference of the two fixed magnets. In this way, it can be ensured that the two stop magnets can limit the position of the end of the bracket.

As an implementation manner, the force from the two fixed magnets received by the first movable magnet is greater than the attractive force of the second movable magnet and each stop magnet. In this way, when the second movable magnet drives the bracket to extend or retract, the force of the first movable magnet on the bracket can be overcome to ensure that the bracket extends or retracts.

In practical applications, the volume of the magnets of the first movable magnet and the two fixed magnets is large enough, and/or the magnetic flux density of the first movable magnet and the two fixed magnets is large enough to ensure that the first movable magnet receives The force from the two fixed magnets is greater than the attractive force between the second movable magnet and each stop magnet.

As an implementation manner, the telescopic mechanism may further include a first position detection sensor configured to detect the extension position of the bracket.

The controller is configured to control the retraction of the stent by controlling the current direction of the electromagnet when it is determined that the distance between the extension position of the stent and the final extension position of the stent exceeds a set value. The final protruding position of the bracket is expressed as: the position of the bracket when the second movable magnet is attracted to the stopping magnet of the two stopping magnets close to the slot of the containing groove.

It can be understood that when the distance between the extended position of the stent and the final extended position of the stent exceeds the set value, it can be considered that the stent has left the final extended position after receiving an external force, in order to protect the stent and the components provided above. , The bracket can be retracted into the accommodating slot by controlling the current direction of the electromagnet.

In practical applications, the first position detection sensor can be implemented by Hall sensors, infrared sensors, or other miniature mechanical position switches, etc. The height of the first position detection sensor can be the same as the height of the two stop magnets. The same, or it can be slightly lower than the higher stop magnet of the two stop magnets. In this way, the extended position of the bracket can be confirmed by detecting the position of the second movable magnet.

In an embodiment, the telescopic mechanism may further include a second position detection sensor, and the second position detection sensor is used to detect the retracted position of the bracket. In practical applications, the second position detection sensor can be implemented by Hall sensors, infrared sensors, etc. The height of the second position detection sensor can be the same as the lower stop magnet of the two stop magnets, or it can be slightly higher than two stop magnets. The lower one of the two stop magnets; in this way, the retracted position of the bracket can be confirmed by detecting the position of the second movable magnet.

As an implementation manner, the above-mentioned telescopic mechanism may further include a guiding mechanism configured to guide the direction of movement of the bracket when it extends out of the accommodating groove or retracts into the accommodating groove. In this way, through the setting of the guide mechanism, it is convenient to control the movement direction of the bracket, and it is convenient to realize the extension or retraction of the bracket.

Second embodiment

Based on the first embodiment of the present application, an example is given.

FIG. 1 is a schematic diagram of the terminal of the embodiment of the present invention when the bracket is not extended, and FIG. 2 is a schematic diagram of the terminal of the embodiment of the present invention when the bracket is extended. As shown in Figures 1 and 2, the terminal includes a housing 8 and a bracket 1. The accommodating slot is located at the opening of the housing, and the bracket 1 can be hidden in the housing 8, as shown in Figure 1; Extend out of the shell 8, as shown in Figure 2. Illustratively, the bracket 1 includes a component mounting area where functional components are installed. In an example, the functional components include at least one of the following: a camera, an earpiece, a proximity sensor, a light sensor, and a face recognition device. The functional components on the bracket 1 and the main board of the terminal may be electrically connected by a flexible printed circuit (FPC) or other flexible cables.

The following is an example of installing the camera on the bracket.

1, when the bracket 1 is in the final retracted position, the second stop magnet 7 and the second movable magnet 6 are attracted together, so as to keep the camera in the housing 8. When the support 1 is in the final extended position, as shown in FIG. 2, the first stop magnet 5 and the second movable magnet 6 are attracted together to maintain the extended state of the camera.

As shown in Figure 1, the first movable magnet 2, the first fixed magnet 3, and the second fixed magnet 4 are all electromagnets, the first movable magnet 2 is fixed on the bracket 1, the first fixed magnet 3 and the second fixed magnet 4 Then it is fixed on the housing 8, and these three types of electromagnets are electrically connected to the terminal system. When the above-mentioned electromagnet is energized and forms the corresponding magnetic pole direction as shown in Figure 2 (that is, the magnetic poles of the first fixed magnet 3 from top to bottom are S and N poles, and the first movable magnet 2 is from top to bottom. The poles are S poles and N poles, the second fixed magnet 4 has N poles and S poles from top to bottom). A repulsive force is formed between the second fixed magnet 4 and the first movable magnet 2. The first fixed magnet 3 and the A movable magnet 2 forms an attractive force. Under the combined drive of the above-mentioned repulsive force and attractive force, the first movable magnet 2 moves upward under the guidance of the guide mechanism 11 to drive the bracket 1 to pop out of the housing 8.

As shown in Fig. 2, by changing the current direction of the first movable magnet 2, the magnetic pole direction and the force direction of the first movable magnet 2 can be changed, thereby driving the support 1 to move downward under the guidance of the guide mechanism 11. Finally, the bracket 1 is retracted into the housing 8.

It is understandable that the embodiment of the present invention uses direct electromagnetic driving force to replace the micro-precision stepping motor, precision reduction gear mechanism, and screw drive mechanism used in related technologies, thereby reducing the complexity and cost of the telescopic mechanism.

As an implementation manner of the embodiment of the present invention, the first movable magnet 2 may be a permanent magnet with high magnetic density and high magnetic flux. In this way, by changing the current direction of the first fixed magnet 3 and the second fixed magnet 4, the magnet can be realized. Switch between repulsive force and attractive force.

As an implementation of the embodiment of the present invention, the first movable magnet 2 is still maintained as an electromagnet, and the first fixed magnet 3 and the second fixed magnet 4 are permanent magnets with high magnetic density and high magnetic flux. The switching of repulsive force and attractive force between magnets is still achieved by changing the direction of current of the electromagnet.

As shown in FIG. 1 and FIG. 2, under the constraint of the guide mechanism 11, the bracket 1 can slide up and down smoothly in a straight line in the housing 8. The second movable magnet 6 and the first movable magnet 2 are fixed on the bracket 1 and can move together with the bracket 1. The first fixed magnet 3, the second fixed magnet 4, the first stop magnet 5, and the second stop magnet 7 are all fixed on the housing 8.

The second movable magnet 6, the first stop magnet 5, and the second stop magnet 7 are all permanent magnets. As shown in Fig. 1, when the bracket 1 is in the final retracted position, the second movable magnet 6 and the second stop magnet 7 can be attracted together to maintain the retracted state of the bracket. When the bracket 1 is in the final extended position, the second movable magnet 6 and the first stop magnet 5 can be attracted together to maintain the extended state of the bracket.

The first movable magnet 2, the first fixed magnet 3, and the second fixed magnet 4 may all be cylindrical electromagnets, and they may all be electrically connected to the terminal main board. Since the second movable magnet 6 is a moving part relative to the housing 8, the electrical connection between it and the main board needs to be realized by flexible parts, such as FPC or other flexible cables.

The three magnets of the first fixed magnet 3, the second fixed magnet 4, and the first movable magnet 2 are large in volume, and the attractive or repulsive force between them is much larger than the first stop magnet 5 and the second stop magnet 7. , The attraction between the second movable magnets 6 each other.

In summary, the terminal of the embodiment of the present invention mainly includes two sets of magnet systems, namely, a set of magnet systems composed of a first fixed magnet 3, a second fixed magnet 4, and a first movable magnet 2, and a first stop magnet 5. A magnet system composed of the second stop magnet 7 and the second movable magnet 6. Through these two sets of magnet systems, the drive of the extension and retraction of the bracket 1 and the maintenance of the extension and retraction state can be achieved.

In an embodiment, as shown in Figures 1 and 2, the first position detection sensor 9 and the second position detection sensor 10 are mounted on the circuit board or the housing 8. When the bracket 1 is in the final extended position, the first The position detection sensor 9 can detect the relevant position and can send a corresponding signal to the controller. When the bracket 1 is in the final retracted position (the position of the bracket when the second stop magnet 7 and the second movable magnet 6 are attracted together), the second position detection sensor 10 can detect the relevant position, and can control the position The device sends the corresponding signal. The above-mentioned first position detection sensor 9 and second position detection sensor 10 may adopt a contact method or a non-contact method to realize position detection. In practical applications, the above-mentioned first position detection sensor 9 and second position detection sensor 10 may be implemented by Hall sensors, infrared sensors, and the like.

As shown in FIG. 1, when the bracket 1 is in the final retracted position, the second movable magnet 6 and the second stop magnet 7 can be attracted together, so that the bracket 1 is maintained in the retracted state.

In an example, when the camera needs to be extended, power can be supplied to the three electromagnets, the first movable magnet 2, the second fixed magnet 4, and the first fixed magnet 3, so that the three electromagnets can generate as shown in Figure 2. The magnetic pole distribution state shown, at this time, a relatively large repulsive force is generated between the first movable magnet 2 and the second fixed magnet 4, which greatly exceeds the attraction force between the second movable magnet 6 and the second stop magnet 7, thereby making The stent 1 is extended from the final retracted position. At the same time, attractive force is generated between the second movable magnet 6 and the first stop magnet 5 due to the distribution of magnetic poles. Finally, under the combined action of the repulsive force and attractive force of the three electromagnets, the bracket 1 extends until the end After the extended position, the power supply to the three electromagnets: the first movable magnet 2, the second fixed magnet 4, and the first fixed magnet 3 can be cancelled. At this time, the first stop magnet 5 and the second movable magnet 6 attract Together to maintain the extended state of the camera.

When the camera needs to be retracted, power can be supplied to the three electromagnets, the first movable magnet 2, the second fixed magnet 4, and the first fixed magnet 3, so that the three electromagnets produce the magnetic pole distribution state as shown in Figure 2. (That is, the magnetic poles of the first fixed magnet 3 from top to bottom are S and N poles, the magnetic poles of the first movable magnet 2 from top to bottom are N and S poles, and the second fixed magnet 4 is from top to bottom. N pole and S pole). That is, controlling the direction of the power supply current of the first movable magnet 2 can generate a relatively large repulsive force between the first movable magnet 2 and the first fixed magnet 3, which greatly exceeds that between the second movable magnet 6 and the first stop magnet 5. At the same time, the opposite magnetic poles between the first movable magnet 2 and the second stop magnet 7 are opposite, which can generate attractive force. Driven by the aforementioned repulsive force and attractive force, the bracket 1 moves in the retracting direction until it retracts to the final retracted position, and then the first movable magnet 2, the second fixed magnet 4, and the first fixed magnet can be cancelled. 3 These three electromagnets are powered. At this time, the second stop magnet 7 and the second movable magnet 6 are attracted together to maintain the retracted state of the camera.

When the bracket 1 is in the final extended position, the bracket 1 maintains this position under the attraction of the first stop magnet 5 and the second movable magnet 6. At this time, if the head of the bracket 1 receives an external force that exceeds the attractive force of the magnet, the bracket 1 will leave the final extended position. At this time, the first position detection sensor 9 can detect that the bracket 1 has left the final extended position abnormally. In order to protect the camera bracket and the camera and other functional components carried by it, the retracting bracket procedure can be initiated until the camera bracket is retracted into the housing 8.

The third embodiment

On the basis of the telescopic mechanism described in the foregoing embodiment of the present application, the third embodiment of the present invention provides an electronic device.

Here, the electronic device includes a casing and any one of the aforementioned telescopic mechanisms. The telescopic mechanism is located at the opening of the housing, for example, the accommodating slot is located at the top of the housing with the opening facing upward. It can be seen that when the telescopic mechanism of the embodiment of the present invention has the feature of low cost, it is helpful to reduce the cost of the electronic device and improve the cost performance of the electronic device.

As an implementation manner, the bracket may include a component installation area where functional components are installed; in a specific example, the functional components include at least one of the following: a camera, an earpiece, a proximity sensor, a light sensor, and a face recognition device. It can be seen that when a functional component needs to be used, the solution of the embodiment of the present invention can be used to reliably drive the bracket to extend, thereby driving the functional component to extend out of the housing.

As an implementation manner, the electronic device further includes a main board, and the electromagnet in the telescopic drive component is electrically connected to the main board through a flexible cable. In this way, when the bracket moves, it can be ensured that the electromagnet and the main board are always electrically connected, and the reliability of the telescopic drive component can be ensured.

Those skilled in the art can understand that the electronic equipment can also be other electronic equipment products such as tablet computers, ordinary computers and notebook computers, that is, the telescopic mechanism can be applied to not only camera devices, mobile phones, but also tablet computers , Ordinary computers and notebook computers and other electronic equipment products.

Claims

A telescopic mechanism, comprising a bracket and an accommodating slot for accommodating the bracket, wherein a telescopic driving component is arranged in the accommodating slot, the telescopic driving component includes an electromagnet and a controller, and the controller is configured as By controlling the current direction of the electromagnet, the bracket is controlled to extend out of the containing groove or retract into the containing groove.
The telescopic mechanism according to claim 1, wherein the telescopic driving component comprises a first movable magnet fixed on the bracket and two fixed magnets fixed in the accommodating groove, the first movable magnet The magnet is located between the two fixed magnets; the first movable magnet is the electromagnet, and/or the two fixed magnets are the electromagnets;

The controller is configured to move the first movable magnet by controlling the current direction of the first movable magnet and/or the two fixed magnets as the electromagnet, and drive the bracket to extend The containing groove or retract the containing groove.
The telescopic mechanism according to claim 2, wherein the two fixed magnets include a first fixed magnet and a second fixed magnet;

In the case where the first movable magnet and the two fixed magnets are both the electromagnets, the controller is configured to control the current direction of the first movable magnet and/or the two fixed magnets , Making the first movable magnet and the first fixed magnet generate attractive force, and causing the first movable magnet and the second fixed magnet to generate a repulsive force; the first movable magnet is in contact with the first Move under the combined action of the attractive force generated by the fixed magnet and the repulsive force generated by the second fixed magnet, and drive the bracket to extend out of the accommodating slot;

Alternatively, in the case where the first movable magnet and the two fixed magnets are both the electromagnets, the controller is configured to control the first movable magnet and/or the two fixed magnets The direction of the current causes the first movable magnet and the first fixed magnet to generate repulsive force, and the first movable magnet and the second fixed magnet to generate attractive force; the first movable magnet is in contact with the It moves under the combined action of the repulsive force generated by the first fixed magnet and the attractive force generated by the second fixed magnet, and drives the bracket to retract into the containing groove.
The telescopic mechanism according to claim 2, wherein the two fixed magnets include a first fixed magnet and a second fixed magnet;

In the case where the first movable magnet is the electromagnet and the two fixed magnets are both permanent magnets, the controller is configured to control the current direction of the first movable magnet so that the first movable magnet The movable magnet and the first fixed magnet generate an attractive force, and the first movable magnet and the second fixed magnet generate a repulsive force; the first movable magnet generates an attractive force with the first fixed magnet Move under the combined action of the repulsive force generated by the second fixed magnet, and drive the bracket to extend out of the accommodating slot;

Alternatively, in the case where the first movable magnet is the electromagnet and the two fixed magnets are both the permanent magnets, the controller is configured to control the current direction of the first movable magnet to make The first movable magnet and the first fixed magnet generate a repulsive force, and cause the first movable magnet and the second fixed magnet to generate attractive force; the first movable magnet is in contact with the first fixed magnet The generated repulsive force and the attractive force generated by the second fixed magnet move together, and drive the bracket to retract into the containing groove.
The telescopic mechanism according to claim 2, wherein the two fixed magnets include a first fixed magnet and a second fixed magnet;

In the case where the first movable magnet is a permanent magnet and the two fixed magnets are both the electromagnets, the controller is configured to control the current direction of the two fixed magnets so that the first The movable magnet and the first fixed magnet generate an attractive force, and the first movable magnet and the second fixed magnet generate a repulsive force; the first movable magnet generates an attractive force with the first fixed magnet Move under the combined action of the repulsive force generated by the second fixed magnet, and drive the bracket to extend out of the accommodating slot;

Or, in the case where the first movable magnet is the permanent magnet and the two fixed magnets are both the electromagnets, the controller is configured to control the current direction of the two fixed magnets to make The first movable magnet and the first fixed magnet generate a repulsive force, and cause the first movable magnet and the second fixed magnet to generate attractive force; the first movable magnet is in contact with the first fixed magnet The generated repulsive force and the attractive force generated by the second fixed magnet move together, and drive the bracket to retract into the containing groove.
The telescopic mechanism according to claim 2, wherein the interaction force between the first movable magnet and the two fixed magnets is on the same straight line.
The telescopic mechanism according to any one of claims 2 to 6, wherein the telescopic drive component further comprises a second movable magnet fixed on the bracket, and two stop positions fixed in the accommodating groove A magnet, the second movable magnet is located between the two stop magnets; the two stop magnets both generate attractive force to the second movable magnet;

When the bracket extends out of the accommodating slot, the second movable magnet is attracted to one of the two stopping magnets to stop the bracket from moving; When the bracket is retracted into the accommodating groove, the second movable magnet is attracted to the other of the two stopping magnets to stop the bracket from moving.
The telescopic mechanism according to claim 7, wherein when the heights of the two stop magnets are different, the height difference of the two stop magnets is less than or equal to the height difference of the two fixed magnets.
The telescopic mechanism according to claim 7, wherein the force from the two fixed magnets received by the first movable magnet is greater than that of the second movable magnet and the two stop magnets. The attraction of a bit magnet.
7. The telescopic mechanism according to claim 7, wherein the interaction force between the second movable magnet and the two stop magnets is on the same straight line.
8. The telescopic mechanism according to claim 7, wherein the telescopic mechanism further comprises a first position detection sensor configured to detect the extended position of the bracket;

The controller is configured to, in response to determining that the distance between the extended position of the support and the final extended position of the support exceeds a set value, by controlling the current direction of the electromagnet to control the retracting of the support Back; the final extension position of the bracket is expressed as: when the second movable magnet and the stopping magnet near the slot of the accommodating groove of the two stopping magnets are attracted together, the bracket s position.
The telescopic mechanism according to claim 1, wherein the telescopic mechanism further comprises a guide mechanism configured to guide the direction of movement of the bracket when extending or retracting into the accommodating groove .
An electronic device, wherein the electronic device comprises a casing and the telescopic mechanism according to any one of claims 1 to 12; and the containing groove is located at the opening of the casing.
The electronic device according to claim 13, wherein the bracket includes a component mounting area for mounting functional components.
13. The electronic device according to claim 13, wherein the electronic device further comprises a main board, and the electromagnet in the telescopic drive part is electrically connected to the main board through a flexible cable.