CN112509861A

CN112509861A - Controllable force key

Info

Publication number: CN112509861A
Application number: CN202010852594.4A
Authority: CN
Inventors: 杨晓锋
Original assignee: Dongguan Redong Electronic Technology Co ltd
Current assignee: Dongguan Redong Electronic Technology Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-03-16
Also published as: WO2022037135A1

Abstract

The invention provides a controllable force key, which comprises a middle shaft, a first magnetic element and a coil group, wherein the middle shaft is provided with a first magnetic element; the middle shaft, the first magnetic element and the coil group are coaxially arranged; the first magnetic element is sleeved on the middle shaft and can reciprocate in the coil group along the axis direction along with the middle shaft; the coil group is used for generating an attraction magnetic field or a repulsion magnetic field according to the variable current so as to act on the first magnetic element; the coil group comprises a plurality of coils, when the middle shaft is pressed by external force, one coil of the plurality of coils generates a repulsion magnetic field, and after a preset time, the plurality of coils are connected in series to generate a suction magnetic field. Through the coil quantity that rationally sets up the production repulsion and gravitation, produce the repulsion by a coil when the button is pressed, can shorten response time, improve the intensity of repulsion, establish ties by a plurality of coils when producing the attraction and produce the attraction magnetic field, also can guarantee the magnetic field size when reducing the electric current, can reduce the coil simultaneously and generate heat.

Description

Controllable force key

Technical Field

The invention relates to the technical field of interactive equipment, in particular to a controllable force key.

Background

The existing magnetic type key generates attraction or repulsion according to variable current through a coil to generate sectional inductance, because the coil is mainly embodied as inductance characteristic, the current change has a process, the larger the inductance is, the longer the charging time is, however, the size of the inductance is in direct proportion to the number of turns of the coil, and if the number of turns of the coil is smaller, the smaller the resistance of the coil is, the more power is consumed under the condition of direct current.

The repulsion that the coil produced is controlled with instantaneous current, if the coil inductance is bigger, too short instantaneous current can't guarantee that the coil produces the biggest repulsion, and the coil number of turns is too little, and direct current when producing the attraction magnetic field is too big, and the coil also generates heat great.

Disclosure of Invention

The object of the present invention includes, for example, providing a controllable force button that can improve the problems of power consumption and heat generation of the conventional magnetic force button.

The technical scheme adopted by the invention is as follows:

in a first aspect, an embodiment of the present invention provides a force-controllable key, where the force-controllable key includes a central axis, a first magnetic element, and a coil assembly;

the middle shaft, the first magnetic element and the coil group are coaxially arranged;

the first magnetic element is sleeved on the middle shaft, and the outer diameter of the first magnetic element is smaller than the inner diameter of the coil group;

when the middle shaft is pressed by an external force to reciprocate towards the coil group, the first magnetic element reciprocates in the coil group along the axis direction along with the middle shaft;

the coil group is used for generating an attraction magnetic field or a repulsion magnetic field according to variable current so as to act on the first magnetic element;

the coil group comprises a plurality of coils, when the middle shaft is pressed by an external force, one of the coils generates the repulsive magnetic field, and after a preset time, the coils are connected in series to generate the attractive magnetic field.

In an alternative embodiment, the coil assembly includes a first coil and a second coil, and the first coil includes a first coil first end and a first coil second end;

the second coil comprises a second coil first end and a second coil second end;

a first end of the first coil forms a first pin; the second end of the first coil is electrically connected with the first end of the second coil to form a second pin; a second end of the second coil forms a third pin;

when the middle shaft is pressed by an external force, the variable current flows in from the second pin and flows out from the first pin to generate the attractive magnetic field;

after a preset time, the variable current flows in from the first pin and flows out from the third pin to generate the repulsive magnetic field.

In an alternative embodiment, the first coil is stacked with the second coil.

In an alternative embodiment, the first coil and the second coil are nested inside and outside.

In an alternative embodiment, the bottom bracket includes a first section, a second section, and a first stop;

the first section and the second section are respectively arranged at two sides of the first limiting part, the second section faces the coil assembly, and the first section is far away from the coil assembly;

the first magnetic element is sleeved on the first section, and the length of the first magnetic element is smaller than that of the first section.

In an alternative embodiment, the controllable force button further comprises a bottom cover and an upper cover;

the bottom cover is sunken to form a mounting part, and the coil group, the middle shaft and the first magnetic element are arranged on the mounting part;

the upper cover is matched with the bottom cover so as to cover the coil assembly, the middle shaft and the first magnetic element in the mounting part;

the upper cover is provided with a through hole, and when the upper cover covers the bottom cover, one end of the middle shaft, which is far away from the coil group, is exposed through the through hole.

In an alternative embodiment, the controllable force button further comprises a button, and the button is arranged at one end of the central shaft, which is far away from the coil assembly;

when the upper cover covers the bottom cover, the button is exposed through the through hole.

In an optional embodiment, the controllable force button further includes a control circuit board, the control circuit board is provided with a control chip and a trigger module, and the trigger module is electrically connected to an input end of the control chip;

the control chip further comprises a plurality of IO ports, and the IO ports are electrically connected with the coil group;

the triggering module is used for generating a triggering signal when the middle shaft is pressed by an external force and transmitting the triggering signal to the control chip;

the control chip is used for outputting the variable current to the coil assembly according to the trigger signal, so that the coil assembly generates an attraction magnetic field or a repulsion magnetic field according to the variable current to act on the first magnetic element.

In an alternative embodiment, the triggering module comprises a photosensitive element and an emission light source corresponding to the photosensitive element;

the photosensitive element is electrically connected with the input end of the control chip;

the middle shaft is provided with a light-transmitting groove which can be penetrated by the light of the emission light source;

when the central shaft is forced to move towards the coil assembly, light rays of the emitting light source penetrate through the central shaft from the light-transmitting groove to reach the photosensitive element, so that the photosensitive element generates a trigger signal.

In an optional implementation manner, the trigger module includes a first metal elastic sheet, the first metal elastic sheet is connected to an input end of the control chip, a second metal elastic sheet corresponding to the first metal elastic sheet is disposed at one end of the center shaft close to the coil assembly, and when the center shaft is forced to move toward the coil assembly, the first metal elastic sheet and the second metal elastic sheet are in contact and conducted to generate a trigger signal.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a controllable force key, which comprises a middle shaft, a first magnetic element and a coil group, wherein the middle shaft is provided with a first magnetic element; the middle shaft, the first magnetic element and the coil group are coaxially arranged; the first magnetic element is sleeved on the middle shaft, and the outer diameter of the first magnetic element is smaller than the inner diameter of the coil group; when the middle shaft is pressed by an external force to reciprocate towards the coil group, the first magnetic element reciprocates in the coil group along the axis direction along with the middle shaft; the coil group is used for generating an attraction magnetic field or a repulsion magnetic field according to the variable current so as to act on the first magnetic element; the coil group comprises a plurality of coils, when the middle shaft is pressed by external force, one of the coils generates a repulsion magnetic field, and after a preset time, the coils are connected in series to generate an attraction magnetic field. Through the coil quantity that rationally sets up the production repulsion and gravitation, produce the repulsion by a coil when the button is pressed, can shorten response time, improve the intensity of repulsion, establish ties by a plurality of coils when producing the attraction and produce the attraction magnetic field, also can guarantee the magnetic field size when reducing the electric current, can reduce the coil simultaneously and generate heat.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of an appearance of a controllable force button according to the present embodiment;

fig. 2 is a schematic view of a partial structure of the controllable force button provided in this embodiment;

fig. 3 is a schematic view of a partial structure of the controllable force button provided in this embodiment when a force is applied to the controllable force button;

fig. 4 is a pin diagram of the coil assembly provided in this embodiment;

FIG. 5 is a schematic center axis view provided in the present embodiment;

FIG. 6 is a schematic diagram of a partial structure of another controllable force button provided in this embodiment;

fig. 7 is a schematic view of an assembly structure of the controllable force button provided in this embodiment;

fig. 8 is a schematic view of an assembly structure of the upper cover and the bottom cover provided in this embodiment;

fig. 9 is a schematic diagram illustrating a connection between the control circuit board and the coil assembly according to this embodiment;

fig. 10 is a schematic diagram of the control method provided in this embodiment.

Icon: 100-force controllable keys; 110-medial axis; 111-first stage; 112-a second segment; 113-a first stop; 114-a return spring; 120-a first magnetic element; 121-a second magnetic element; 130-coil set; 131-a first coil; 132-a second coil; 133-first pin; 134-second pin; 135-third pin; 136-element leg; 140-a bottom cover; 141-a mounting portion; 150-upper cover; 151-through holes; 160-control circuit board; 161-a trigger module; 162-control chip; 170-push buttons.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

In order to solve the above problems, the present application provides a controllable force button 100 to solve the problems of power consumption and heat generation of the conventional magnetic force button.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an appearance of a controllable force button 100 according to an embodiment; fig. 2 shows a schematic structural diagram of a part of the controllable force button 100 provided in this embodiment, and in a possible implementation manner, the controllable force button 100 provided in this embodiment of the present invention includes a central axis 110, a first magnetic element 120, and a coil assembly 130.

The middle shaft 110, the first magnetic element 120 and the coil assembly 130 are coaxially disposed, and the first magnetic element 120 is sleeved on the middle shaft 110 and can move along with the movement of the middle shaft 110.

The outer diameter of the first magnetic element 120 is smaller than the inner diameter of the coil assembly 130, and when the middle shaft 110 is pressed by an external force to reciprocate toward the coil assembly 130, the first magnetic element 120 reciprocates in the coil assembly 130 along the axial direction with the middle shaft 110. For example, when the central shaft 110 is not under force, the first magnetic element 120 is located outside the coil assembly 130, and when the central shaft 110 is pressed by an external force, the first magnetic element 120 enters the coil assembly 130.

The coil assembly 130 is configured to generate an attractive magnetic field or a repulsive magnetic field according to a variable current to act on the first magnetic element 120; the coil assembly 130 includes a plurality of coils, and when the central shaft 110 is pressed by an external force, one of the plurality of coils generates a repulsive magnetic field, and after a preset time period, the plurality of coils are connected in series to generate an attractive magnetic field.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating the controllable force button 100 pressed by a force. In the controllable force button 100 provided by this embodiment, when the middle shaft 110 is pressed by an external force, a magnetic field is generated by one coil, so that the length (number of turns) of the coil is reduced, and the inductance of the coil is reduced. After the preset time, the plurality of coils simultaneously generate a suction magnetic field, so that the magnetic field can be ensured while the current is reduced, and in addition, the reduction of the current can also avoid the heating of an inductor.

The preset duration can be used for controlling the triggering strength of the key, and in a possible implementation manner, the preset duration is a duration of millisecond level, the greater the duration is, the greater the triggering strength is, and otherwise, the smaller the triggering strength is.

The plurality of coils of the coil assembly 130 may be stacked or nested inside and outside, and when the plurality of coils are stacked, the coil generating the repulsive magnetic field is the uppermost coil, i.e., the coil close to the first magnetic element 120; when the coils are nested inside and outside, the coil generating the repulsive magnetic field is the inner coil.

The following describes an arrangement of the coil assembly 130 with reference to the drawings. With reference to fig. 2 and fig. 3, in one possible embodiment, the coil assembly 130 includes a first coil 131 and a second coil 132, wherein the first coil 131 includes a first coil first end and a first coil second end; the second coil 132 includes a second coil first end and a second coil second end.

The first coil 131 and the second coil 132 are stacked, wherein the first coil 131 is disposed on a side close to the first magnetic element 120, the second coil 132 is disposed on a side far away from the first magnetic element 120, and a first end of the second coil 132 is adjacent to a second end of the first coil 131.

Referring to fig. 4, a first end of the first coil forms a first pin 133, and a second end of the first coil is electrically connected to a first end of the second coil to form a second pin 134; the second coil second end forms a third pin 135.

In one possible implementation manner, the middle shaft 110 is pressed by an external force to reciprocate toward the coil assembly 130, and the first stroke and the second stroke are included, where the first stroke is a stroke in which the middle shaft 110 moves toward the coil assembly 130, and the second stroke is a stroke in which the middle shaft 110 moves away from the coil assembly 130.

When the middle shaft 110 is pressed by an external force to perform a first stroke, a variable current flows in from the second pin 134 and flows out from the first pin 133, and the first coil 131 alone generates a suction magnetic field.

After a preset time, the direction of the current is changed, the variable current is controlled to flow in from the first pin 133 and flow out from the third pin 135, and the first coil 131 and the second coil 132 are connected in series to generate a repulsive magnetic field.

In a possible implementation, the first coil 131 and the second coil 132 may also be arranged inside and outside in a nested manner, wherein the first coil 131 is arranged on the inner side and the second coil 132 is arranged on the outer side.

When the middle shaft 110 is pressed by an external force, a variable current flows in from the second pin 134 and flows out from the first pin 133, and an attractive magnetic field is generated by the first coil 131 at the inner side alone. After a predetermined time interval, a repulsive magnetic field is generated by the inner first coil 131 and the outer second coil 132 connected in series and acts on the first magnetic element 120.

Since the coil is mainly characterized by inductance, the current change in the power-on process has a process, and the larger the inductance, the longer the charging time. However, the size of the inductance is proportional to the number of turns of the coil, and if the number of turns of the coil is smaller, the resistance of the coil is smaller, and the more power is consumed in the case of direct current. While the repulsion is controlled by the instantaneous current, if the coil inductance is larger, the too short instantaneous current cannot guarantee the coil to generate the maximum repulsion. The coil turns are too small, the current is too large under the driving of large suction direct current, and the coil also generates too much heat. The application provides a controllable power button 100, through controlling first coil 131 earlier and producing repulsion, increases the number of turns of coil again, produces suction by first coil 131 and second coil 132 simultaneously, can produce the section and feel. In addition, when the repulsion force is generated, the 1 coil is electrified to generate a repulsion magnetic field, so that the current rises faster and the generated magnetic force is larger at the same time; two coils are connected in series during attraction, so that the current is reduced, and the size of a magnetic field can be ensured.

In one possible implementation manner, referring to fig. 5, the middle shaft 110 includes a first section 111, a second section 112, and a first limiting member 113. The first segment 111, the first limiting member 113, and the second segment 112 are disposed along the axial direction of the central shaft 110, the first segment 111 and the second segment 112 are disposed on two sides of the first limiting member 113, the second segment 112 faces the coil assembly 130, and the first segment 111 is away from the coil assembly 130.

Referring to fig. 3 and fig. 5, the first magnetic element 120 is sleeved on the first segment 111, wherein the length of the first magnetic element 120 is smaller than the length of the first segment 111, and the end of the first segment 111 (i.e., the end of the first segment 111 away from the first position-limiting member 113) is exposed through the first magnetic element 120.

In a possible implementation, referring to fig. 6, the second section 112 of the bottom bracket 110 is provided with a return spring 114, when the bottom bracket 110 is pressed by force, the bottom bracket 110 enters a first stroke; once the external force is removed, the coil assembly 130 can be reset by the repulsive force and the reset spring 114, and the second stroke is entered.

In another implementation manner of this embodiment, the key switch further includes a second magnetic element 121, the second magnetic element 121 is disposed on the first section 111 of the bottom bracket 110, and the first magnetic element 120 and the second magnetic element 121 can generate a repulsive force.

In the embodiment, the middle shaft 110, the first magnetic element 120, the coil assembly 130, the return spring 114, and the like form a key switch of the force controllable key 100, and the force controllable key 100 further includes a housing, and the key switch is disposed in the housing.

Referring to fig. 7, fig. 7 is an assembly diagram of the controllable force button 100 provided in this embodiment, and in a possible implementation manner, the housing includes a bottom cover 140 and an upper cover 150.

Referring to fig. 7 and 8, fig. 8 is a schematic view illustrating an assembly of the bottom cover 140 and the upper cover 150, wherein the bottom cover 140 is recessed to form a mounting portion 141, and the key switch is disposed on the mounting portion 141; the upper cover 150 is engaged with the bottom cover 140 to cover the key switch in the mounting portion 141.

Referring to fig. 1, 7 and 8, the upper cover 150 is provided with a through hole 151, and when the upper cover 150 is covered on the bottom cover 140, an end of the central shaft 110 away from the coil assembly 130 (i.e., an end of the first segment 111) is exposed through the through hole 151.

Referring to fig. 1, fig. 7 and fig. 8, in a possible implementation, the controllable force button 100 further includes a button 170, and the button 170 is disposed at an end of the central axis 110 away from the coil assembly 130 (i.e., an end of the first segment 111); when the upper cover 150 is covered on the bottom cover 140, the button 170 is exposed through the through hole 151.

It can be understood that a second stopper is disposed on the button 170, and the second stopper is used for limiting the button 170 inside the upper cover 150, so as to prevent the button 170 from completely separating from the upper cover 150.

Referring to fig. 7 and fig. 9 in combination, in a possible implementation manner, the controllable force button 100 further includes a control circuit board 160, a control chip 162 and a trigger module 161 are disposed on the control circuit board 160, and the trigger module 161 is electrically connected to an input end of the control chip 162; the control chip 162 further includes a plurality of IO ports, and the IO ports are electrically connected to the coil assembly 130; for outputting a variable current to the coil assembly 130, so that the coil assembly 130 generates a corresponding magnetic field according to the variable current.

The triggering module 161 is used for generating a triggering signal when the middle shaft 110 is pressed by an external force, and transmitting the triggering signal to the control chip 162. The control chip 162 is configured to output a variable current to the coil assembly 130 according to the trigger signal, so that the coil assembly 130 generates an attraction magnetic field or a repulsion magnetic field according to the variable current to act on the first magnetic element 120.

Referring to fig. 1 and fig. 9, in a possible implementation manner, taking the coil assembly 130 as an example that the coil assembly 130 includes the first coil 131 and the second coil 132, in the present embodiment, the first coil 131 and the second coil 132 include three pins, so that the control chip 162 is electrically connected to the coil assembly 130 through three device pins 136, wherein the first device pin 136 is electrically connected to the first pin 133, the second device pin 136 is electrically connected to the second pin 134, and the third device pin 136 is electrically connected to the third pin 135.

When the trigger module 161 outputs a trigger signal to the control chip 162, the IO port of the control chip 162 outputs a variable current to the coil assembly 130 through the element pin 136, so that the coil assembly 130 generates a corresponding magnetic field to act on the first magnetic element 120.

The triggering module 161 may employ a non-contact trigger, such as a light-sensitive trigger. In one possible implementation, the triggering module 161 includes a photosensitive element and an emission light source corresponding to the photosensitive element.

The photosensitive element is electrically connected with the input end of the control chip 162; the central shaft 110 is provided with a light-transmitting slot through which the light of the emitting light source can pass, for example, the light-transmitting slot can be disposed on the second section 112 of the central shaft 110, when the central shaft 110 is forced to move toward the coil assembly 130, the light of the emitting light source passes through the central shaft 110 from the light-transmitting slot to reach the photosensitive element, so that the photosensitive element generates the trigger signal. The light emitting source may be disposed inside the middle shaft 110 or inside the bottom cover 140, which is not limited in this embodiment.

In another possible implementation manner, the triggering module 161 may also use a contact type trigger, and generate the triggering signal by using a spring sheet, a film, or a contact switch. For example, the triggering module 161 includes a first metal elastic sheet connected to the input end of the control chip 162, and a second metal elastic sheet corresponding to the first metal elastic sheet is disposed at one end of the central shaft 110 close to the coil assembly 130, and when the central shaft 110 is forced to move toward the coil assembly 130, the first metal elastic sheet and the second metal elastic sheet are in contact with each other and conducted to generate the triggering signal.

Referring to fig. 9, fig. 10 shows a flow chart of a control method of the controllable force button 100, which includes the following steps.

Step S210: it is detected whether a trigger signal is generated.

If the trigger signal is detected, the step S220 is not executed, and if the trigger signal is not detected, the detection is repeated.

Step S220: when it is detected that the trigger signal is generated, a first current is output to the first coil 131 to cause the first coil 131 to generate a repulsive magnetic field.

Step S230: after a predetermined period of time, a second current is output to the first coil 131 and the second coil 132, so that the first coil 131 and the second coil 132 generate an attractive magnetic field, wherein the direction of the second current is opposite to that of the first current.

Step S240: and when the trigger signal is not detected, stopping outputting the second current and re-detecting the trigger signal.

In summary, the present invention provides a controllable force button 100, which includes a central shaft 110, a first magnetic element 120, and a coil assembly 130; the central shaft 110, the first magnetic element 120 and the coil assembly 130 are coaxially arranged; the first magnetic element 120 is sleeved on the middle shaft 110, and the outer diameter of the first magnetic element 120 is smaller than the inner diameter of the coil assembly 130; when the middle shaft 110 is pressed by an external force to reciprocate towards the coil assembly 130, the first magnetic element 120 reciprocates in the coil assembly 130 along the axial direction with the middle shaft 110; the coil assembly 130 is configured to generate an attractive magnetic field or a repulsive magnetic field according to a variable current to act on the first magnetic element 120; the coil assembly 130 includes a plurality of coils, and when the central shaft 110 is pressed by an external force, one of the plurality of coils generates a repulsive magnetic field, and after a preset time period, the plurality of coils are connected in series to generate an attractive magnetic field. Through the coil quantity that rationally sets up the production repulsion and gravitation, produce the repulsion by a coil when the button is pressed, can shorten response time, improve the intensity of repulsion, establish ties by a plurality of coils when producing the attraction and produce the attraction magnetic field, also can guarantee the magnetic field size when reducing the electric current, can reduce the coil simultaneously and generate heat.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A controllable force key is characterized by comprising a middle shaft, a first magnetic element and a coil group;

2. The controllable force button of claim 1, wherein the coil assembly comprises a first coil and a second coil, the first coil comprising a first coil first end and a first coil second end;

the second coil comprises a second coil first end and a second coil second end;

3. The controllable force key of claim 2, wherein the first coil is stacked with the second coil.

4. The controllable force button of claim 2, wherein the first coil and the second coil are nested inside out.

5. The force controllable key of claim 1, wherein said central axis comprises a first segment, a second segment, and a first stop;

6. The controllable force key of claim 1, further comprising a bottom cover and an upper cover;

7. The force controllable key of claim 6, further comprising a button disposed at an end of said central axis distal from said coil assembly;

8. The controllable force button according to claim 6, further comprising a control circuit board, wherein the control circuit board is provided with a control chip and a trigger module, and the trigger module is electrically connected to an input terminal of the control chip;

9. The controllable force button of claim 8, the triggering module comprising a light sensitive element and an emitting light source corresponding to the light sensitive element;

10. The controllable power button of claim 8, wherein the triggering module comprises a first metal spring, the first metal spring is connected to the input terminal of the control chip, a second metal spring corresponding to the first metal spring is disposed at one end of the central shaft close to the coil assembly, and when the central shaft is forced to move toward the coil assembly, the first metal spring contacts and conducts with the second metal spring to generate the triggering signal.