CN217933545U - Key structure and electronic equipment - Google Patents

Abstract

The utility model relates to a button technical field, in particular to button structure and electronic equipment. The key structure comprises a shell, a pressing piece, a pressure sensor and a supporting structure, wherein the shell and the supporting structure are arranged oppositely to define an accommodating space, and the pressing piece and the pressure sensor are correspondingly arranged and are arranged in the accommodating space. The pressing piece is provided with an elastic pressing part, the pressure sensor is provided with a sensing area, the pressing part is arranged on one side close to the pressure sensor and corresponds to the sensing area, and the cross-sectional area of the pressing part gradually increases towards the direction far away from the sensing area. Thus, the variation of the force sensed by the sensing area can be accurately controlled according to the compression amount of the pressing part, and the sensing precision of the key structure can be improved. The compression amount of the pressing part with the cross section area changed under the same extrusion force is larger, so that the pressing touch feeling of a user when pressing the key structure can be improved without changing the size of the trigger signal.

Description

Key structure and electronic equipment

[ technical field ] A method for producing a semiconductor device

The utility model relates to a button technical field, in particular to button structure and electronic equipment.

[ background of the invention ]

With the development of society, the trend of miniaturization of electronic devices, such as smart phones, smart watches, and wireless headsets, is becoming more apparent. For this reason, in such electronic devices, the pressure sensor having a more compact structure is also gradually used as the key, and the signal output is controlled by the pressure change of the pressure sensor. However, because the pressure sensors have assembly errors during installation, the assembly errors often cause inconsistent triggering pressures of the same batch of keys, and further the use feeling of customers is greatly reduced.

[ Utility model ] content

Because assembly error leads to triggering pressure inconsistent technical problem when the installation for solving pressure sensor, the utility model provides a button structure.

The utility model provides a technical problem's scheme provides a button structure, button structure includes shell, pressing piece, pressure sensor and bearing structure, the shell sets up and defines a accommodation space with bearing structure relatively, the pressing piece with the pressure sensor corresponds the setting and place in the accommodation space; the pressing piece is further provided with an elastic pressing part, the pressure sensor is further provided with a sensing area, the pressing part is arranged on one side close to the pressure sensor and corresponds to the sensing area, and the cross section area of the pressing part is gradually increased towards the direction far away from the sensing area.

Preferably, the pressing part and the pressure sensor are sandwiched between the housing and the supporting structure, and in an initial state, the pressing part and the pressure sensor contact each other and press the sensing area.

Preferably, the pressing piece is further provided with a connecting part connected with the pressing part, and the cross section area of the connecting part is kept unchanged in the direction away from the sensing area; either one of the pressure sensor and the connecting portion is provided on the housing, and the other is provided on the support structure.

Preferably, the pressing portion is disposed corresponding to a central position of the sensing region.

Preferably, the connecting portion and the pressing portion are integrally molded.

Preferably, the pressing part is any one of a silica gel pressing part, a foam pressing part, a rubber pressing part or a metal elastic sheet.

Preferably, the pressing part is a spherical bulge with a circular cross section; or the pressing part is a cone-shaped bulge with an oval cross section; or the pressing part is a boss with a polygonal cross section.

Preferably, the pressing portion is an arc-shaped protrusion, and one surface of the pressing portion, which is abutted to the pressure sensor, is an arc-shaped curved surface.

Preferably, in an initial state, a gap is maintained between the pressing member and the pressure sensor.

Another technical solution to solve the technical problem is to provide an electronic device, which includes the above-mentioned key structure.

Compared with the prior art, the utility model provides a pair of button structure and electronic equipment has following advantage:

1. the utility model discloses set up the elasticity that corresponds with it at the sensing region and press the splenium, elastic pressing the splenium can transmit the power that receives to the sensing region when the atress. As can be understood, since the cross-sectional area of the pressing portion gradually increases toward a direction away from the sensing region, when the pressing portion is pressed, the cross-sectional area of the same position of the pressing portion gradually increases by the pressing force; and along with the release of the extrusion force, the cross-sectional area of the same position of the pressing part gradually returns to the initial state along with the reduction of the extrusion force. Because the pressing piece directly or indirectly transmits force to the sensing area through the pressing part, when the pressing part is pressed, the cross section area of the pressing part is gradually increased along with the increase of the pressing force, the area for transmitting force on the pressing part is also gradually increased, and the variation of the force sensed by the sensing area is also gradually increased along with the increase of the force transmission area of the pressing part; when the extrusion force of the pressing part is released, the cross section area of the pressing part gradually returns to the initial state along with the reduction of the extrusion force, the area for transmitting force on the pressing part is also gradually reduced, and the variation of the force sensed by the sensing area gradually increases along with the reduction of the force transmission area of the pressing part. Therefore, the variable quantity of the force sensed by the sensing area can be accurately controlled according to the compression quantity of the pressing part, and the sensing precision of the key structure can be improved; meanwhile, the pressing part can gradually increase the force transmission area while transmitting the extrusion force to the sensing area, so that the applied force can be transmitted to the sensing area through the pressing part well no matter whether the force application direction is over against the sensing area or not. The pressing part with the cross sectional area gradually changing towards the direction far away from the sensing area is easier to be compressed when being extruded, namely, the compression amount of the pressing part with the cross sectional area changing under the same extrusion force is larger, so that the pressing touch feeling of a user when pressing the key structure can be improved while the size of a trigger signal of the key structure is not changed.

2. The utility model discloses pressing the splenium to contradict with pressure sensor, pressing the cross-sectional area of splenium toward keeping away from sensing area's direction grow gradually, consequently pressing the area of contact between splenium and the sensing area and being crescent, the change amount of the force that sensing area sensed also changes gradually promptly, adopt such setting mode to be convenient for control the change amount of the force that sensing area sensed according to the compression capacity of pressing the splenium, have higher practicality.

3. The utility model discloses for the convenience of the preparation installation of pressing the piece in the first embodiment, simultaneously, also in order to make connecting portion can be better transmit power to pressing the splenium when the atress, the cross-sectional area of connecting portion toward keeping away from the sensing regional direction and keep unchanged. Therefore, when the connecting part is arranged on the shell, the force acting on the shell can be more accurately transmitted to the pressing part through the connecting part; and when connecting portion set up on bearing structure, press the splenium through the support that connecting portion can be better, avoid pressing the splenium atress and take place the skew.

4. The utility model discloses press the splenium to correspond the setting with sensing area's central point, consequently press the splenium to push when the splenium extrudees sensing area, press the splenium can outwards extrude sensing area gradually along sensing area's central point. Thus, when the pressing part is prevented from pressing the non-sensing area, the pressing part can be made to press more sensing areas, the interference of the electric signal output by the pressure sensor is reduced, the variation of the electric signal output by the pressure sensor can be further enlarged, and the practicability is high.

5. The utility model discloses first embodiment connecting portion with press splenium integrated into one piece, adopt such mode of setting more to be convenient for according to the preparation and the installation of pressing the piece, also can strengthen connecting portion simultaneously and press the connection structure intensity between the splenium, avoid connecting portion and press the drop between the splenium.

6. The utility model discloses press splenium and the inconsistent one side of pressure sensor to be the arc curved surface. It can be understood that each point of the curved surface corresponds to an orientation, and when any place of the curved surface is stressed, the force can be uniformly dispersed all around. Therefore, when the external force is applied to the pressing member, the applied force can be well transmitted to the sensing region through the pressing portion regardless of whether the force application direction is opposite to the sensing region.

[ description of the drawings ]

Fig. 1 is a partial cross-sectional view of a key structure according to a first embodiment of the present invention.

Fig. 2 is a partial sectional view of another key structure provided in the first embodiment of the present invention.

Fig. 3 is a partial sectional view of another key structure according to the first embodiment of the present invention.

Fig. 4 is a schematic structural view of a pressing portion according to a first embodiment of the present invention.

Fig. 5 is another schematic structural diagram of the pressing portion according to the first embodiment of the present invention.

Fig. 6 is a partial cross-sectional view of a key structure according to a second embodiment of the present invention.

Fig. 7 is a partial cross-sectional view of a key structure according to a third embodiment of the present invention.

Fig. 8 is a partial sectional view of another key structure according to a third embodiment of the present invention.

Fig. 9 is a partial sectional view of an earphone provided by a fourth embodiment of the present invention.

The attached drawings indicate the following:

1. a key structure;

11. a housing; 12. a pressing member; 13. a pressure sensor; 14. a support structure; 15. an accommodating space;

111. a pressing area; 121. a pressing part; 122. a connecting portion; 131. a sensing region;

1211. an arc-shaped curved surface;

2. a key structure;

3. a key structure;

4. an earphone;

41. a control unit.

[ detailed description ] A

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "first" and "second" and the like in the description and the claims of the present invention are used for distinguishing different objects, and are not used for describing a specific order.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Referring to fig. 1 to 3, a first embodiment of the present invention provides a key structure 1, in which the key structure 1 includes a housing 11, a pressing member 12, a pressure sensor 13 and a supporting structure 14, the housing 11 and the supporting structure 14 are disposed opposite to each other and define an accommodating space 15, and the pressing member 12 and the pressure sensor 13 are disposed correspondingly and disposed in the accommodating space 15. Furthermore, the pressing member 12 further has an elastic pressing portion 121, the pressure sensor 13 further has a sensing region 131, the pressing portion 121 is disposed on a side close to the pressure sensor 13 and corresponds to the sensing region 131, and a cross-sectional area of the pressing portion 121 gradually increases toward a direction (shown in a direction a) away from the sensing region 131.

In the present embodiment, the sensing region 131 is set to be pressed to generate a change in electrical signal. As an embodiment, the pressure sensor 13 includes a sensing material layer and an electrode layer, which are stacked, and when one of the sensing material layer or the electrode layer is pressed, the sensing material layer or the electrode layer approaches to the other of the sensing material layer or the electrode layer, so that a contact area between the sensing material layer and the electrode layer is changed, and further, an electrical property (resistance, capacitance, impedance, or the like) is changed, so that a change of an output electrical signal is caused, and finally, a purpose of pressure sensing is achieved.

As can be understood, the cross-sectional area of the pressing portion 121 gradually increases toward a direction away from the sensing region 131, and when the pressing portion 121 is pressed, the cross-sectional area of the pressing portion 121 at the same position is gradually increased by the pressing force; as the pressing force is released, the cross-sectional area of the pressing portion 121 at the same position gradually returns to the initial state as the pressing force becomes smaller. Since the pressing member 12 directly or indirectly transmits force to the sensing region 131 through the pressing portion 121, when the pressing portion 121 is pressed, the cross-sectional area of the pressing portion 121 becomes gradually larger and the area of the pressing portion 121 for transmitting force increases gradually as the pressing force increases, and the amount of change in force sensed by the sensing region 131 also increases gradually as the force transmission area of the pressing portion 121 increases; when the pressing force of the pressing portion 121 is released, the cross-sectional area of the pressing portion 121 gradually returns to the initial state as the pressing force decreases, the area of the pressing portion 121 for transmitting force also gradually decreases, and the amount of change in the force sensed by the sensing area 131 gradually increases as the force transmitting area of the pressing portion 121 decreases. It can be understood that, by adopting the above arrangement, the variation of the force sensed by the sensing region 131 can be accurately controlled according to the compression amount of the pressing portion 121, and thus the sensing precision of the key structure 1 can be improved; meanwhile, the pressing portion 121 can gradually increase the force transmission area while transmitting the pressing force to the sensing area 131, so that the applied force can be well transmitted to the sensing area 131 through the pressing portion 121 regardless of whether the force application direction is opposite to the sensing area 131. The pressing portion 121 with the cross-sectional area gradually changing toward the direction away from the sensing area 131 is more easily compressed when being pressed by the pressing force, that is, the compression amount of the pressing portion 121 with the cross-sectional area changing under the same pressing force is larger, so that the pressing touch feeling when the user presses the key structure 1 can be improved without changing the size of the trigger signal of the key structure 1.

Referring to fig. 1 and 2, the present invention is not limited to a corresponding arrangement of the pressing portion 121 and the sensing region 131, as long as the pressing portion 121 can transmit the force to the sensing region 131. As shown in fig. 1, as an embodiment, the sensing region 131 is disposed on a side of the pressure sensor 13 facing away from the pressing part 121, so that when the pressure sensor 13 is pressed by the pressing part 121, a force can be transmitted to the sensing region 131 through the pressure sensor 13; as another embodiment, as shown in fig. 2, the pressing part 121 is disposed opposite to the sensing region 131, so that the force can be directly transmitted to the sensing region 131 through the pressing part 121. The embodiment of the present invention is illustrated by way of example, but not limited to, the pressing member 12 and the sensing region 131 being disposed opposite to each other.

Referring to fig. 2 and 3, the installation positions of the pressing member 12 and the pressure sensor 13 are not limited in the embodiment of the present invention. As an embodiment, when one of the pressing piece 12 and the pressure sensor 13 is provided on the housing 11, the other is provided on the supporting structure 14. As shown in fig. 2, when the presser 12 is disposed on the housing 11, the pressure sensor 13 is disposed on the support structure 14; as shown in fig. 3, when the pressing piece 12 is disposed on the support structure 14, the pressure sensor 13 is disposed on the housing 11.

Further, in the present embodiment, in the initial state, the pressing piece 12 abuts against the pressure sensor 13. Specifically, the pressing member 12 and the pressure sensor 13 are interposed between the housing 11 and the support structure 14, and the pressing portion 121 abuts against the pressure sensor 13 and presses the sensing region 131. Specifically, the pressing portion 121 is disposed opposite to the sensing region 131, and the pressing portion 121 abuts against the sensing region 131 and presses the sensing region 131.

As can be understood, since the pressing part 121 interferes with the sensing region 131 and presses the sensing region 131 in the initial state, the sensing region 131 is pressed in the initial state to generate the output of the electrical signal. It can be understood that whether the key structure 1 outputs the control signal is derived from the variation of the electrical signal of the sensing region 131. That is, when the pressing force applied to the sensing region 131 is changed, the electrical signal output by the sensing region 131 changes, and when the change amount reaches a set value, the key structure 1 outputs a control signal. In the utility model discloses in, because the initial state pushes down portion 121 and sensing area 131 and contradicts and extrudes sensing area 131, consequently can be through continuously extruding sensing area 131 in order to realize the change of the electric signal that sensing area 131 outputs, also can be through the change of the extrusion force of release sensing area 131 department in order to realize the electric signal that sensing area 131 outputs.

As an embodiment, a pressing area 111 is disposed on an outer side of the housing 11 for a user to press conveniently, and when the pressing area 111 is disposed in a force-bearing direction of the sensing area 131 and is disposed corresponding to the pressing member 12, the user can increase a pressure applied to the sensing area 131 by pressing the pressing area 111, and the pressure on the sensing area 131 changes to change at least one electrical parameter.

As another embodiment, when the pressing area 111 is disposed in a direction perpendicular to the force direction of the sensing area 131, when a user presses the pressing area 111, the pressed areas of the housing 11 are forced to approach each other, and the housings 11 far from the pressing area 111 are pressed to separate from each other, at this time, the pressing piece 12 interposed between the housing 11 and the supporting structure 14 is released to reduce the pressing force of the pressing portion 121 on the sensing area 131, so that the pressure on the sensing area 131 changes, and at least one electrical parameter is changed.

It can be understood that when the pressing portion 121 presses the sensing region 131, the pressing portion 121 moves toward the sensing region 131, and the cross-sectional area of the pressing portion 121 gradually increases toward the sensing region 131, so that the contact area between the pressing portion 121 and the sensing region 131 gradually increases while the pressing portion 121 approaches the sensing region 131, and the force acting on the pressing portion 121 can be better transmitted to the sensing region 131. Similarly, when the pressing portion 121 moves away from the sensing region 131, the contact area between the pressing portion 121 and the sensing region 131 is gradually reduced, so as to better release the pressure applied to the sensing region 131. Since the contact area between the pressing portion 121 and the sensing region 131 is gradually increased or decreased, the amount of change of the force sensed by the sensing region 131 is gradually changed, and such an arrangement can more accurately control the amount of change of the force sensed by the sensing region 131 according to the compression amount of the pressing portion 121, and has high practicability. Meanwhile, since the pressing portion 121 pushes the sensing area 131 against the pressure sensor 13 in the initial state, the problem of poor consistency caused by installation errors can be well solved by controlling the pressing force of the pressing portion 121 on the sensing area 131 in the initial state, and the reliability of the key structure 1 is further improved.

The utility model discloses do not specifically limit to pressing the relative position of splenium 121 and sensing area 131, press splenium 121 to correspond any position setting of sensing area 131.

As shown in fig. 3, in an embodiment of the present invention, the pressing portion 121 is disposed corresponding to a center position of the sensing region 131. Specifically, the pressing portion 121 is disposed corresponding to the center of the sensing area 131 along the minimum cross-sectional area of the sensing area 131 in the force-receiving direction.

It can be understood that, because the pressing portion 121 directly corresponds to the sensing region 131, the pressing portion 121 can directly transmit the pressure to the sensing region 131, so as to reduce the pressure applied to the non-sensing region, and the pressure applied to the non-sensing region is smaller, so that the interference to the electrical signal output by the pressure sensor 13 can be reduced, and the sensing accuracy of the pressure sensor 13 is further improved. Meanwhile, when the pressing part 121 presses the sensing region 131, the pressing part 121 gradually presses the sensing region 131 outward along the central position of the sensing region 131. In this way, when the pressing portion 121 is prevented from pressing the non-sensing region, the pressing portion 121 can be made to press more of the sensing region 131, so that the amount of change in the electrical signal output by the pressure sensor 13 can be further increased while reducing the interference of the electrical signal output by the pressure sensor 13, and the practicability is high.

Referring to fig. 4, the shape of the pressing portion 121 is not limited in the present invention, and the shape of the pressing portion 121 can be set according to specific requirements. As shown in a of fig. 4, the pressing part 121 may be a spherical protrusion having a circular cross section; as shown in fig. 4 b, the pressing portion 121 may also be a cone with an elliptical cross section; as shown in c of fig. 4, the pressing portion 121 may also be a boss having a polygonal cross section.

Referring to fig. 3 and 5, as a preferred embodiment, the pressing portion 121 is an arc-shaped protrusion, and a surface of the pressing portion 121 abutting against the pressure sensor 13 is an arc-shaped curved surface 1211.

It can be understood that each point of the arc-shaped curved surface corresponds to an orientation, and when any place of the arc-shaped curved surface is stressed, the force can be uniformly dispersed all around. Therefore, when the pressing member 12 is externally applied with a force, the applied force can be well transmitted to the sensing region 131 through the pressing portion 121 regardless of whether the applied force is directed to the sensing region 131.

Of course, in other embodiments, the surface of the pressing portion 121 that contacts the pressure sensor 13 may have another shape.

Referring to fig. 6, a key structure 2 is provided according to a second embodiment of the present invention, and components in the key structure 2 are the same as those in the key structure 1, and the advantageous effects thereof have been described in the first embodiment and are not described herein again. The key structure 2 is different from the key structure 1 in that: in the initial state, a gap is maintained between the pressing piece 12 and the pressure sensor 13, and the cross-sectional area of the pressing portion 121 gradually increases in a direction away from the sensing region 131.

It can be understood that, in the embodiment, the pressing region 111 is disposed in the force receiving direction of the sensing region 131 and is disposed corresponding to the pressing member 12, when the pressing member 12 is pressed through the pressing region 111, the pressing portion 121 moves toward the direction close to the pressure sensor 13 and presses the pressure sensor 13, because the cross-sectional area of the pressing portion 121 gradually increases toward the direction away from the sensing region 131, the contact area between the pressing portion 121 and the sensing region 131 gradually increases, that is, the amount of change of the force sensed by the sensing region 131 also gradually changes, and such an arrangement is adopted to facilitate the control of the amount of change of the force sensed by the sensing region 131 according to the amount of compression of the pressing portion 121, and has high practicability.

Referring to fig. 7, a key structure 3 according to a third embodiment of the present invention includes components of the key structure 1, and the beneficial effects of the components are described in the first embodiment and are not described herein again. The key structure 3 is different from the key structure 1 in that: the pressing member 12 further has a connecting portion 122 connected to the pressing portion 121, the connecting portion 122 is disposed corresponding to the sensing region 131, and a cross-sectional area of the connecting portion 122 is constant in a direction away from the sensing region 131. Either one of the pressure sensor 13 and the connecting portion 122 is provided on the housing 11, and the other is provided on the support structure 14.

Referring to fig. 7 and 8, it can be understood that, in an initial state, a certain gap may be maintained between the pressing member 12 and the pressure sensor 13 (as shown in fig. 7), and the pressing member 12 and the pressure sensor 13 may also interfere with each other (as shown in fig. 8), which is exemplified by the interference between the pressing member 12 and the pressure sensor 13.

Referring to fig. 8, as an embodiment, the connecting portion 122 is disposed on the housing 11, and the pressing portion 121 abuts against the sensing region 131. It can be understood that, since the cross-sectional area of the connecting portion 122 is kept constant in the direction away from the sensing region 131, the force acting on the housing 11 can be more accurately transmitted to the pressing portion 121 through the connecting portion 122; meanwhile, the regular connecting portion 122 is more convenient for manufacturing and installing the pressing member 12.

The utility model discloses do not do specific restriction to the cross sectional shape of connecting portion 122, connecting portion 122 can be the circular shape cylinder for cross sectional shape, and connecting portion 122 also can be for cross sectional shape is square, and connecting portion 122 still can be for cross sectional shape is rectangular cuboid. Preferably, in the embodiment of the present invention, the connecting portion 122 is a rectangular parallelepiped with a rectangular cross-sectional shape.

The utility model discloses do not do specific restriction to connecting portion 122 with the connected mode who presses portion 121, connecting portion 122 with press portion 121 can link together through the mode that bonds, connecting portion 122 with press portion 121 also can integrated into one piece. Preferably, the connecting portion 122 and the pressing portion 121 are integrally formed, such an arrangement is more convenient for manufacturing and mounting the pressing member 12, and the strength of the connecting structure between the connecting portion 122 and the pressing portion 121 can be enhanced to prevent the connecting portion 122 and the pressing portion 121 from falling off.

The utility model discloses do not do specific restriction to pressing the material of splenium 121, pressing splenium 121 can pressing the splenium for the silica gel that adopts the silica gel preparation to form, pressing splenium 121 also can pressing the splenium for the bubble cotton that adopts the cotton preparation of bubble to form, pressing splenium 121 still can pressing the splenium for the rubber that adopts the rubber preparation to form, pressing splenium 121 still can be for adopting the metal shrapnel that the metal preparation formed. Preferably, the connecting portion 122 and the pressing portion 121 according to the embodiment of the present invention are made of silicone. Of course, in other embodiments, the connecting portion 122 and the pressing portion 121 may be made of different materials.

The fourth embodiment of the present invention further provides an electronic device, which includes the above-mentioned key structure 1, or the key structure 2, or the key structure 3. The electronic equipment can be a computer, a mobile phone, an earphone and the like. The specific structures and advantageous effects of the key structures 1, 2 and 3 have been described in the above embodiments, and are not described herein. The embodiment of the present invention is illustrated with an earphone provided with the key structure 3 as an electronic device, and is not limited thereto.

Referring to fig. 9, in the present embodiment, the housing 11 of the key structure 3 is a housing of the earphone 4. The earphone 4 further includes a control unit 41 electrically connected to the pressure sensor 13, the control unit 41 is accommodated in the housing 11 and is in communication with an external device, and the control unit 41 transmits a control signal to the external device after the pressure detected by the pressure sensor 13 changes.

In the embodiment of the present invention, the supporting structure 14 may be a PCB board provided with the control unit 41, and the supporting structure 14 may also be a reinforcing board provided in the earphone 4.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A key structure, characterized by: the key structure comprises a shell, a pressing piece, a pressure sensor and a supporting structure, wherein the shell and the supporting structure are arranged oppositely and define an accommodating space, and the pressing piece and the pressure sensor are correspondingly arranged and are arranged in the accommodating space;

the pressing piece is further provided with an elastic pressing part, the pressure sensor is further provided with a sensing area, the pressing part is arranged on one side close to the pressure sensor and corresponds to the sensing area, and the cross section area of the pressing part is gradually increased towards the direction far away from the sensing area.

2. The key structure of claim 1, wherein: the pressing part and the pressure sensor are clamped between the shell and the supporting structure, and in an initial state, the pressing part is abutted against the pressure sensor and extrudes the sensing area.

3. The key structure of claim 2, wherein: the pressing piece is also provided with a connecting part connected with the pressing part, and the cross section area of the connecting part keeps unchanged towards the direction far away from the sensing area; either one of the pressure sensor and the connecting portion is provided on the housing, and the other is provided on the support structure.

4. The key structure of claim 2, wherein: the pressing part is arranged corresponding to the center position of the sensing area.

5. A key structure according to claim 3, wherein: the connecting portion and the pressing portion are integrally formed.

6. A key structure according to claim 3, wherein: the pressing part is any one of a silica gel pressing part, a foam pressing part, a rubber pressing part or a metal elastic sheet.

7. The key structure according to any one of claims 2 to 6, wherein: the pressing part is a spherical bulge with a circular cross section;

or the pressing part is a cone-shaped bulge with an oval cross section;

or the pressing part is a boss with a polygonal cross section.

8. The key structure according to any one of claims 2 to 6, wherein: the pressing part is an arc-shaped bulge, and the pressing part and the surface, which is abutted to the pressure sensor, are arc-shaped curved surfaces.

9. The key structure of claim 1, wherein: in an initial state, a gap is maintained between the pressing member and the pressure sensor.

10. An electronic device, characterized in that: the electronic device comprising a key structure according to any one of claims 1 to 9.

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