CN212659462U - Key structure and electronic equipment - Google Patents

Abstract

The utility model discloses a button structure, including substrate, pressure sensor and support the pressure part, pressure sensor locates on the substrate, support the pressure part with pressure sensor sets up relatively, be equipped with the orientation on the pressure part the protruding bellying that sets up of pressure sensor, the bellying is in projection on the substrate is located pressure sensor is in the projection region on the substrate, the bellying is used for the button structure receive external force when pressing down with the pressure sensor butt. By adopting the scheme of the embodiment, the pressure identification error of the pressure sensor can be reduced, and the identification precision of the pressure sensor can be effectively improved. In addition, the utility model also discloses an electronic equipment of having this button structure.

Description

Key structure and electronic equipment

Technical Field

The utility model relates to a button technical field especially relates to a button structure and electronic equipment.

Background

In the related art, a pressure sensor is generally added to a key, and the degree of pressing force of a user is identified by the pressure sensor to perform a corresponding key function. At present, a resistance-type pressure sensor is mostly adopted in a pressure sensor, and the resistance-type pressure sensor mainly causes the resistance of a resistance strain gauge in the pressure sensor to change when force acts on the pressure sensor, so that the change of the resistance is processed by a circuit and then is output in an electric signal mode. However, when the force of pressing by the user is light and the change of the resistance value is not obvious enough, the pressure sensor cannot easily identify the corresponding resistance value, so that the corresponding electric signal cannot be output, and the identification precision is not high.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses button structure and electronic equipment can realize multistage forced induction and satisfy the frivolous designing requirement of fingerprint identification button.

In order to achieve the above object, in a first aspect, the present invention discloses a key structure, including a substrate;

a pressure sensor disposed on the substrate; and

the pressing component is opposite to the pressure sensor, a protruding portion protruding towards the pressure sensor is arranged on the pressing component, the projection of the protruding portion on the base material is located in the projection area of the pressure sensor on the base material, and the protruding portion is used for being abutted to the pressure sensor.

In the button structure that this embodiment provided, the button structure can be applied to among the electronic equipment, when this button structure is pressed to external force, this pressure sensor can take place deformation and with the bellying butt to pressure sensor's resistance changes, and because the bellying can increase this pressure sensor's resistance change with the extrusion deformation that pressure sensor butt produced. It can be seen that, the scheme of this embodiment is adopted, is favorable to reducing pressure sensor's pressure identification error, promptly, when the exogenic action is less, because this bellying and pressure sensor's butt effect, can increase pressure sensor's resistance change, makes it can discern corresponding exogenic action to effectively improve pressure sensor's identification accuracy.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the key structure further includes a limiting component;

the limiting part is arranged on one surface of the base material, which is provided with the pressure sensor, or the limiting part is arranged on one surface of the pressing part, which is provided with the bulge part;

the limiting component is used for limiting the distance formed between the pressure sensor and the boss when the pressure sensor is not pressed by the external force.

The arrangement of the limiting component is increased, so that the pressure sensor can keep a distance with the boss in an initial state (namely, when no external force is applied to press the pressure sensor), and the situation that the resistance value of the pressure sensor is changed to cause misoperation due to the fact that the pressure sensor is contacted with the boss to generate extrusion acting force on the pressure sensor is avoided.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the limiting member is an annular member, when the limiting member is disposed on the substrate, the limiting member is disposed around the periphery of the pressure sensor, and when the limiting member is disposed on the pressing member, the limiting member is disposed around the periphery of the protruding portion. Adopt spacing portion to encircle the periphery that establishes at pressure sensor or the periphery of bellying for cyclic annular part to can all-roundly ensure to keep the condition that the interval avoids the extrusion to appear the maloperation between pressure sensor and the bellying when initial condition.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the thickness of the position-limiting component is H1, the protrusion height of the pressure sensor on the first surface is H2, the protrusion height of the protruding portion on the second surface is H3, and H1 is greater than or equal to H2+ H3;

among them, H1, H2, and H3 are all positive numbers.

When the thickness of the limiting part is larger than or equal to the sum of the protruding height of the pressure sensor and the protruding height of the protruding part, the distance between the pressure sensor and the protruding part in the initial state is guaranteed to the maximum extent.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the limiting component is an elastic component. The limiting component has elasticity and can deform when being pressed by external force to reduce or even eliminate the distance between the pressure sensor and the boss, and the pressure sensor can be abutted against the boss when being pressed by the external force, so that the resistance value change of the pressure sensor can be further increased, and the identification precision of the pressure sensor is improved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the pressure sensor includes a first piezo resistor, a second piezo resistor, and a voltage detection unit, the first piezo resistor includes a first connection end and a second connection end, the first connection end is used for connecting a power input end, the second piezo resistor includes a third connection end and a fourth connection end, the third connection end is connected in series with the second connection end, the fourth connection end is used for connecting a ground end, the voltage detection unit is connected between the second connection end and the third connection end, and the voltage detection unit is used for detecting voltages of the second connection end and the third connection end;

the protruding part is arranged corresponding to the first piezoresistor or the second piezoresistor and used for being abutted against the first piezoresistor or the second piezoresistor so as to enable the voltage of the first piezoresistor or the second piezoresistor to change.

Because the first piezoresistor and the second piezoresistor of the pressure sensor are connected in series, if the protruding part is simultaneously abutted against the first piezoresistor and the second piezoresistor, and the resistance values of the first piezoresistor and the second piezoresistor can be changed, the voltages of the first piezoresistor and the second piezoresistor detected by the voltage detection unit are the same, and the effect of determining the pressing acting force according to the voltage variation of the detected resistor cannot be achieved. Therefore, the protruding part is limited to be abutted against the first piezoresistor or the second piezoresistor of the pressure sensor, when the pressure sensor is pressed by external force, the resistance value of the first piezoresistor or the second piezoresistor can be changed, and the voltage value of the first piezoresistor or the second piezoresistor is changed, so that the pressing acting force can be determined according to the voltage value of the first piezoresistor or the second piezoresistor, and the effect of executing the corresponding key function according to the pressing acting force is realized.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the protruding portion is a bump structure or a convex spherical structure, and when the protruding portion is the convex spherical structure, the diameter of the protruding portion is 0.5mm to 2 mm. The convex part is in a convex point structure or a convex spherical structure, so that the contact area of the convex part and the pressure sensor can be reduced, and the extrusion effect of the convex part on the pressure sensor is increased. In addition, because the diameter of the bulge part is small, the bulge part is in approximate point contact when being abutted with the pressure sensor, so that the pressure receiving surface of the pressure sensor is as small as possible, and the probability of extrusion damage to the pressure sensor can be reduced.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the key structure further includes a fingerprint identification module, the fingerprint identification module includes a protection cover plate, a fingerprint identification chip and a flexible circuit board, which are sequentially stacked, and the fingerprint identification chip is electrically connected to the flexible circuit board;

the pressing part is arranged on one surface, deviating from the fingerprint identification chip, of the flexible circuit board, the pressing part is used for reinforcing the flexible circuit board, and the pressure sensor faces the surface, deviating from the flexible circuit board, of the pressing part.

The adoption increases the fingerprint identification module for this button structure not only has the button function, still further has the fingerprint identification function, thereby the function of this button structure is more comprehensive. Meanwhile, due to the fact that the pressing force degrees of different users are different, the combination of fingerprint identification and the pressure sensor enables each user to synchronously record the pressing force degrees in normal use to serve as an auxiliary authentication function of fingerprint identification authentication when the fingerprint authentication is collected, and the identification accuracy of the key structure is higher.

Furthermore, the pressing part is arranged on one surface of the flexible circuit board, which is far away from the fingerprint identification chip, and when the pressing part is pressed by external force, the pressing part can be used for supporting and reinforcing the flexible circuit board, so that the deformation of the flexible circuit board caused by the pressing action of the external force is reduced.

In a second aspect, the present invention discloses an electronic device, the electronic device includes a housing and a key structure as described in the first aspect, the key structure is disposed in the housing, and the pressure sensor is electrically connected to a main board in the housing. The button structure is arranged in the shell, a user can realize a button touch function only by touching the position of the shell corresponding to the button structure, the button structure is not required to be arranged on the shell through a hole, and the dustproof and waterproof performance of the electronic equipment is effectively improved.

In addition, since the electronic device includes the key structure of the first aspect, the electronic device further has the beneficial effects of the key structure of the first aspect.

As an alternative, in an embodiment of the second aspect of the present invention, the housing has a front side and a back side which are oppositely spaced apart, and a side surface enclosed between the front side and the back side, the front side is provided with a screen, and the key structure is provided on the side surface of the housing. Locate the side of casing with the button structure, not only the user operation of being convenient for can also avoid occupying the front space of casing to screen when reducing to the casing openly set up the screen accounts for than the influence.

As an alternative implementation, in an embodiment of the second aspect of the present invention, the housing is provided with a first through hole, the key structure is provided in the first through hole, and the key structure covers an opening of the first through hole facing the outside of the housing. The first through hole is arranged on the shell and used for arranging the key structure, and the key structure covers the opening, facing the outside of the shell, of the first through hole, so that a user can know the arrangement position of the key structure on the shell, and the user can press the key structure conveniently.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the embodiment of the utility model provides a button structure and electronic equipment, through increasing the part of pressing that supports that sets up relatively with pressure sensor, set up on the part of pressing to towards the bellied bellying of pressure sensor, utilize the bellying to be used for receiving external force at this button structure and press time and pressure sensor butt to make pressure sensor take place extrusion deformation, and then make pressure sensor's resistance change increase, be favorable to reducing pressure sensor's pressure identification error, effectively improve pressure sensor's identification accuracy.

Furthermore, the bulge part is aligned to the first piezoresistor or the second piezoresistor of the pressure sensor, and the first piezoresistor or the second piezoresistor is correspondingly extruded during extrusion, so that the resistance value of the first piezoresistor or the second piezoresistor is changed, the voltage of the first piezoresistor or the second piezoresistor is further changed, and the identification precision of the pressure sensor is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a first structure of a key structure according to an embodiment of the disclosure;

FIG. 2A is a schematic view of the key structure of FIG. 1 with a position-limiting member disposed on a first side;

FIG. 2B is a schematic structural diagram of the key structure of FIG. 1 in which a position-limiting component is disposed on the second surface;

fig. 3 is a schematic circuit diagram of a pressure sensor according to the first embodiment;

fig. 4 is a schematic view of the abutment position of the boss portion with the pressure sensor of the first embodiment;

FIG. 5 is a diagram illustrating a second structure of a key structure disclosed in this embodiment;

FIG. 6A is a schematic view of the structure of the key structure of FIG. 5 in which a position-limiting member is disposed on the first surface;

FIG. 6B is a schematic diagram of the structure of the key structure of FIG. 5 in which a position-limiting component is disposed on the second surface;

fig. 7 is a schematic structural diagram of an electronic device disclosed in the second embodiment as a mobile phone;

FIG. 8 is a schematic view of another angle of FIG. 7;

fig. 9 is a schematic structural diagram of a key structure disposed inside an electronic device according to a second embodiment;

fig. 10 is a schematic side view of a mobile phone as an electronic device disclosed in the third embodiment;

fig. 11 is a schematic structural diagram of a key structure disposed inside an electronic device according to the third embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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 to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

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 skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Example one

Fig. 1 is a schematic view of a first structure of a key structure according to an embodiment of the present invention. The key structure 100 can be applied to an electronic device to perform a key control function. The key structure 100 may include a base material 10, a pressure sensor 11, and a pressing part 12. The pressure sensor 11 may be disposed on the substrate 10. The pressing member 12 is disposed opposite to the pressure sensor 11, and a protrusion 120 protruding toward the pressure sensor 11 is provided on the pressing member 12, and a projection of the protrusion 120 on the substrate 10 is located in a projection area of the pressure sensor 11 on the substrate 10. The protrusion 120 is configured to abut against the pressure sensor 11 when the key structure is pressed by an external force, so as to deform the pressure sensor 11 by compression.

The disclosed button structure of this embodiment, through set up bellied bellying 120 towards pressure sensor 11 on pressure part 12, utilize bellying 120 to make pressure sensor 11 can further take place extrusion deformation when pressure sensor 11 receives external force to press with pressure sensor 11 butt, thereby can increase pressure sensor 11's resistance change, also can in time discern when making the external force that pressure sensor 11 received weak, and then reduce pressure sensor 11's identification error, effectively promote pressure sensor 11's identification accuracy.

Alternatively, the substrate 10 may be FR4 (epoxy glass substrate 10) or a metal substrate 10, so as to support the pressure sensor 11 when being pressed by an external force, and prevent the substrate 10 from being deformed by the external force.

Alternatively, the pressing member 12 may be disposed below the pressure sensor 11. As shown in fig. 1, the pressing component 12 and the pressure sensor 11 may be disposed at an interval, so as to avoid the protrusion 120 from abutting on the pressure sensor 11 when not pressed by an external force, so as to ensure the accuracy of the resistance value change of the pressure sensor 11 when the key structure is pressed, and improve the identification accuracy of the pressure sensor 11.

The downward direction of the pressure sensor 11 can be referred to as the direction indicated by the downward arrow in fig. 1, and the upward direction of the pressure sensor 11 is the direction indicated by the upward arrow in fig. 1. The above directions are only examples made for convenience of description, and do not limit the scope of the present embodiment.

In this embodiment, the key structure 100 may further include a limiting part 13, the limiting part 13 may be disposed on a side of the substrate 10 where the pressure sensor 11 is disposed or on a side of the pressing part 12 where the protrusion 120 is disposed, and the limiting part 13 is used for limiting the distance formed between the pressure sensor 11 and the protrusion 120 when the pressure sensor 11 is not pressed by an external force.

As an alternative embodiment, as shown in fig. 2A, the position limiting member 13 is disposed on the side of the substrate 10 on which the pressure sensor 11 is disposed. Specifically, the surface of the substrate 10 on which the pressure sensor 11 is provided is the first surface 101, and the surface of the pressing member 12 on which the boss 120 is provided is the second surface 121. The first surface 101 may be provided with the stopper 13, the stopper 13 may be spaced apart from the pressure sensor 11, and the stopper 13 abuts against the second surface 121. In other words, when the position limiting member 13 is disposed on the first surface 101, the position limiting member 13 can abut against the second surface 121, so that when the external force is not applied to the position limiting member 13, due to the abutting action of the position limiting member 13 and the second surface 121, a distance can be kept between the pressure sensor 11 and the protrusion 120, and therefore, the situation that when the external force is not applied to the position limiting member, the protrusion 120 abuts against the pressure sensor 11, the resistance value of the pressure sensor 11 changes, and the key structure 100 executes the key operation, is avoided.

As another alternative embodiment, as shown in fig. 2B, the stopper member 13 is provided on the side of the pressing member 12 on which the convex portion 120 is provided. That is, the stopper member 13 is provided on the second surface 121, the stopper member 13 may be provided at a distance from the boss 120, and the stopper member 13 may abut on the first surface 101.

Further, the stopper member 13 may be a ring-shaped member. When the stopper 13 is disposed on the first surface 101 of the base material 10, the stopper 13 may be disposed around the outer circumference of the pressure sensor 11. When the stopper 13 is disposed on the second surface 121 of the pressing member 12, the stopper 13 may be disposed on the outer periphery of the boss 120. Thus, the contact area of the stopper member 13 when it abuts against the first surface 101 or the second surface 121 can be increased, and the distance between the pressure sensor 11 and the boss 120 when the stopper member is not pressed by an external force can be maintained as long as possible so that the both do not contact.

Further, the thickness of the position-limiting component 13 may be H1, the protrusion height of the pressure sensor 11 on the first surface 101 of the base material 10 is H2, the protrusion height of the protrusion 120 on the second surface 121 of the pressing component 12 is H3, H1 is greater than or equal to H2+ H3, and H1, H2, and H3 are all positive numbers. The thickness of the limiting part 13 is larger than the sum of the protruding heights of the convex part 120 and the pressure sensor 11, so that the distance between the pressure sensor 11 and the convex part 120 when the pressure sensor is not pressed by external force can be kept to the maximum extent.

Considering that the protruding portion 120 and the pressure sensor 11 are abutted when external force is applied to press, the limiting component 13 may be an elastic component, so that when external force is applied to press, the limiting component 13 may be stressed to generate extrusion deformation, so as to reduce or even eliminate the distance between the protruding portion 120 and the pressure sensor 11, so that the pressure sensor 11 and the protruding portion 120 can be abutted, and further the pressure sensor 11 can generate extrusion deformation.

Optionally, the limiting member 13 may be made of a material with large elastic deformation, such as rubber, silicone, or foam, so that when the external pressing force is small, the limiting member 13 may be easily squeezed to deform, so that the pressure sensor 11 and the protruding portion 120 may abut against each other.

It is understood that the position limiting component 13 can be adhered to the first surface 101 of the base material 10 or adhered to the second surface 121 of the pressing component 12.

In this embodiment, the surface of the protruding portion 120 for abutting against the pressure sensor 11 should be a smooth surface, so that the pressing damage probability of the protruding portion 120 to the pressure sensor 11 can be reduced, and the situation that the pressure sensor 11 is damaged after being pressed for multiple times is avoided.

Further, the protrusion 120 may be a bump protruding from the pressing member 12 or a protruding ball-shaped structure. With the convex point or convex ball structure, the contact surface between the convex portion 120 and the pressure sensor 11 is small when the convex portion 120 abuts against the pressure sensor 11, so that the abutting force of the convex portion 120 against the pressure sensor 11 can be increased.

Illustratively, the raised portion 120 is a convex spherical structure, which may have a radius of 0.5mm to 2 mm. It can be seen that the diameter of the convex portion 120 is smaller, and the convex portion is approximately in point contact with the contact surface of the pressure sensor 11, so that the extrusion acting force of the pressure sensor 11 is more concentrated, and the resistance value change of the pressure sensor 11 is increased.

As shown in fig. 3 and 4, the pressure sensor 11 may include a first varistor R1, a second varistor R2, and a voltage detection unit Vf, wherein the first varistor R1 includes a first connection terminal 110 and a second connection terminal 111, the first connection terminal 110 is used for connecting to the power input terminal VCC, the second varistor R2 includes a third connection terminal 112 and a fourth connection terminal 113, the third connection terminal 112 is connected in series with the second connection terminal 111, the fourth connection terminal 113 is used for connecting to the ground terminal GND, the voltage detection unit Vf is connected between the second connection terminal 111 and the third connection terminal 112, the voltage detection unit Vf is used for detecting voltages of the second connection terminal 111 and the third connection terminal 112, the protrusion 120 is disposed corresponding to the first varistor R1 or the second varistor R2, and the protrusion 120 is used to abut against the first varistor R1 or the second varistor R2, so that the voltage of the first varistor R1 or the second varistor R2 changes. Since the pressure sensor 11 inputs voltages at the first connection terminal 110 and the fourth connection terminal 113, signals are output by measuring voltage change values of the two ends of the first piezo-resistor R1 or the second piezo-resistor R2 before and after being pressed by an external force, so that the key structure 100 performs corresponding functions. Therefore, if the protrusion 120 abuts against the first varistor R1 and the second varistor R2 at the same time, since the first varistor R1 and the second varistor R2 are connected in series, the resistances of the first varistor R1 and the second varistor R2 change at the same time, and thus, the voltage changes of the first varistor R1 and the second varistor R2 are the same, and there is no voltage difference between the first varistor R1 and the second varistor R2, and the effect of determining the pressing force according to the voltage change of the first varistor R1 or the second varistor R2 to perform the corresponding function cannot be achieved.

The difference in the voltage change of the protrusion 120 abutting the first varistor R1 and the second varistor R2 at the same time, and the first varistor R1 or the second varistor R2 with respect to the first varistor R1 or the second varistor R2 will be described in detail with reference to examples below.

The voltage input by the first connection end 110 and the fourth connection end 113 is U, the resistance value of the first piezoresistor is R1, the voltage of the first piezoresistor R1 is U1, the resistance value of the second piezoresistor is R2, the voltage of the second piezoresistor R2 is U2, and the voltage change value Δ U of the first connection end 110 and the second connection end 111 of the first piezoresistor R1 before and after the external force pressing action is measured, that is, Δ U is U2-U1. Wherein, U2 ═ R1 '/(R1 ' + R2), U1 ═ R1/(R1+ R2), and R1 ' is the variable resistance of R1 pressed by external force.

For convenience of description, when the external force pressing action is not applied, the resistance value of the first piezoresistor R1 is equal to that of the second piezoresistor R2, and U1 is 1/2U. When R1 ═ R2 ═ 2K Ω, and the resistance value changes to 1K Ω when the external force is applied, if the boss 120 abuts only the first varistor R1 (as shown in fig. 4, the abutting position in fig. 4 is the position where the boss 120 abuts the first varistor R1, which is an exemplary position, and this embodiment is not specifically limited), then R1' ═ 1K Ω, R2 does not change, U1 ═ 1/2U, and U2 ═ 1/3U, then Δ U ═ 1/6U. That is, at this time, the voltage change value across the first varistor R1 is 1/6U.

When the protrusion 120 abuts against the first varistor R1 and the second varistor R2 at the same time, R1 ' is 1K Ω, R2 ' is 1K Ω, U1 is 1/2U, U2 is 1/2U, and Δ U is 0, where R2 ' is a changed resistance value of the second varistor R2 pressed by an external force.

Therefore, if the protrusion 120 abuts against the first varistor R1 and the second varistor R2 at the same time, the voltage across the first varistor R1 does not change, and the effect of the pressing force cannot be determined effectively according to the voltage change, and the corresponding function cannot be executed.

In other words, with the present embodiment, when the protrusion 120 is disposed, the position of the protrusion 120 and the positions of the first and second piezoresistors R1 and R2 on the pressure sensor 11 should be considered to ensure that the protrusion 120 only abuts against the first or second piezoresistor R1 or R2 of the pressure sensor 11 when abutting against the pressure sensor 11.

Fig. 5 is a schematic diagram of a second structure of the key structure 100 according to the present embodiment. As shown in fig. 5, the key structure 100 of the first embodiment may further include a fingerprint identification module 14, the fingerprint identification module 14 may include a protection cover plate 140, a fingerprint identification chip 141, and a flexible circuit board 142 stacked in sequence, the fingerprint identification chip 141 may be electrically connected to the flexible circuit board 142, the pressing component 12 may be disposed on a surface of the flexible circuit board 142 departing from the fingerprint identification chip 141, and the pressure sensor 11 may be disposed toward a surface of the pressing component 12 departing from the flexible circuit board 142. Considering that the fingerprint recognition module 14 is added to the key structure 100, fingerprint recognition is usually performed first, and then the key function is performed, therefore, the fingerprint recognition module 14 is disposed above the pressure sensor 11, that is, when the key structure 100 is applied to an electronic device, the fingerprint recognition module 14 can be disposed near the outside of the housing of the electronic device compared to the pressure sensor 11.

The upward direction of the pressure sensor 11 can be seen as the direction indicated by the upward arrow in fig. 5, and the opposite is the downward direction of the pressure sensor 11 as the direction indicated by the downward arrow in fig. 5. The above directions are only examples made for convenience of description, and do not limit the scope of the present embodiment.

This button structure 100 still includes the setting of fingerprint identification module 14, can make this button structure 100 still further integrate the fingerprint identification function, effectively expand this button structure 100's function, simultaneously because the pressing force degree of different users when pressing the button is different, therefore, when using this button structure 100 to carry out fingerprint collection authentication, the pressing force degree when still utilizing this pressure sensor 11's setting and synchronous note different users normal use, with the subsidiary authentication function as this fingerprint identification module 14, and then further improve the fingerprint identification precision.

Further, the pressing part 12 is disposed on a surface of the flexible circuit board 142 away from the fingerprint identification chip 141, so that the pressing part 12 can reinforce and support the flexible circuit board 142, and the flexible circuit board 142 is prevented from deforming under stress when being pressed by external force. Alternatively, the pressing member 12 may be made of a metal plate, such as a stainless steel plate or an iron plate.

Referring to fig. 6A and 6B, it can be understood that, in this embodiment, the position-limiting component 13 can also be disposed on the first surface 101 of the base material 10 or the second surface 121 of the pressing component 12, and the specific disposing manner can be referred to the foregoing description of the first structure of the key structure 100, and will not be further described herein.

The embodiment of the utility model provides a disclosed button structure 100, through set up bellying 120 on pressure part 12, utilize bellying 120 to be bump or protruding spherical structure, thereby make bellying 120 can take place extrusion deformation with extrusion pressure sensor 11 butt when the effect is pressed to the exogenic power, thereby increase pressure sensor 11's resistance changes, when the effect is pressed to the exogenic power less, corresponding pressing effect also can be discerned to this pressure sensor 11, thereby can improve pressure sensor 11's identification accuracy.

Example two

Referring to fig. 7 to 9, a second embodiment of the present invention discloses an electronic device 200, where the electronic device 200 includes a housing 20 and a key structure 100, and the key structure 100 may be the first structure described in the first embodiment. The key structure 100 may be disposed in the housing 20, and the pressure sensor 11 of the key structure 100 may be electrically connected to a main board (not shown) inside the housing 20.

The key structure 100 is disposed in the casing 20, and the key structure 100 is a touch press key, so that a user only needs to touch the casing 20 at a position corresponding to the key structure 100, and the touch key function can be realized without opening the key structure 100 on the casing 20, thereby effectively improving the dustproof and waterproof performance of the electronic device 200.

It is understood that the electronic device 200 related to the present embodiment may be any electronic device 200 having functions of communication, talking, storage, or display, for example: smart phones, tablet computers, wearable devices (such as smart watches, smart bracelets), and the like.

For convenience of understanding, as shown in fig. 7 and 8, fig. 7 and 8 show schematic diagrams in which the electronic device 200 is a smartphone. Fig. 7 is a front view of the electronic apparatus 200, from which a screen on the front of the electronic apparatus 200 can be viewed. Fig. 8 is a side view of the electronic device 200, from which the side of the electronic device 200 can be seen, and the square dashed box in fig. 8 indicates the position of the key structure 100 corresponding to the inside of the housing 20. It should be noted that the mobile phone is only an example of one of the electronic devices 200, and the embodiment is not particularly limited.

The housing 20 may serve as a device housing 20 of the electronic device 200, which may have a front surface 21 and a back surface 22 disposed at an interval, and a side surface 23 enclosed between the front surface 21 and the back surface 22, the front surface 21 may be provided with a screen 210, and the key structure 100 may be disposed on the side surface 23 of the housing 20. Therefore, on one hand, the front 21 space of the shell 20 is not occupied, the influence of the screen occupation ratio of the screen 210 arranged on the front 21 of the electronic device 200 is reduced, on the other hand, the position of the key can be conveniently and quickly determined by a user, and the user can conveniently press the key.

Further, when the key structure 100 is disposed on the side 23 of the housing 20, the side 23 of the housing 20 should be a flat surface, so that the key structure 100 can maintain its flatness when disposed, and the pressure sensor 11 can sense the touch force applied to the inner side 23 of the housing 20.

Optionally, in order to facilitate the pressure sensor 11 to sense the touch force of the side 23 of the housing 20, the side 23 of the housing 20 may be made of a metal material having a young's modulus of less than or equal to 120GPa or a plastic material.

In the present embodiment, when the key structure 100 is disposed on the side 23 of the housing 20, the substrate 10 is mainly disposed on the side 23 of the housing 20, and the pressure sensor 11 is disposed along the inside of the housing 20 toward the center of the housing 20. Specifically, the substrate 10 may be adhered to the side 23 of the housing 20 by the adhesive layer 102, such that the substrate 10 may be fixed to the inner side 23 of the housing 20. The adhesive layer 102 may be a pressure sensitive adhesive tape or an elastic adhesive tape, for example, the adhesive layer 102 may be a foam adhesive tape when the elastic adhesive tape is selected, so that when the user touches the housing 20, the adhesive layer 102 may deform so that the deformation may act on the substrate 10 and thus the pressure sensor 11.

Optionally, the thickness of the adhesive layer 102 may be 50um to 300um, and exemplarily may be 100um, so that the thickness of the adhesive layer 102 is very thin, thereby reducing the occupation of the inner space of the housing 20, and simultaneously avoiding the situation that the sensing of the touch force of the user by the pressure sensor 11 is affected when the adhesive layer 102 is too thick.

In the present embodiment, in order to indicate the position of the pressure sensor 11 in the housing 20 for the user to operate, considering that the pressure sensor 11 is disposed in the housing 20, a mark, such as a character mark or a pattern mark, may be disposed on the outer side 23 of the housing 20.

The embodiment of the utility model provides a two disclosed electronic equipment 200 through setting up button structure 100 in casing 20, and reducible outside dust or debris cause the influence to button structure 100 in getting into casing 20, simultaneously, need not to set up the through-hole on casing 20 in order to set up this button structure 100, are favorable to promoting dustproof, the waterproof performance of this electronic equipment 200.

EXAMPLE III

Referring to fig. 10 to fig. 11, a third embodiment of the present invention discloses an electronic device 300, and the electronic device 300 disclosed in the third embodiment is different from the second embodiment in that:

the key structure 100 is the second structure described in the first embodiment. That is, the key structure 100 further includes a fingerprint identification module 14.

Specifically, in order to facilitate the arrangement of the key and fingerprint identification, a first through hole 301 is provided on the side 23 of the housing 20, the key structure 100 can be arranged in the first through hole 301, and the protective cover 140 of the fingerprint identification module 14 covers the opening of the first through hole 301 facing the outside of the housing 20, so that external liquid or dust can be prevented from entering the first through hole 301. Meanwhile, when a user is performing fingerprint recognition, a finger may be placed on the protective cover 140, thereby performing fingerprint recognition.

Further, considering that the key structure 100 is disposed on the side 23 of the housing 20, the key structure 100 may be a power key of the electronic device 300, that is, the key structure 100 not only has a fingerprint recognition function, but also has functions of turning on and off a screen. Specifically, the electronic device 300 includes a key dome 302 disposed in the housing 20 and located below the pressure sensor 11, and the key dome 302 is electrically connected to a main board of the electronic device 300. The key dome 302 may be used to abut against the pressure sensor 11 when the pressure sensor 11 is deformed, thereby implementing a lighting function of the screen 210.

By adopting the electronic device 300 of the third embodiment, the key structure 100 further integrates a fingerprint identification function, so that the user identity identification can be performed while the key function is realized, the integration level of the key structure 100 is higher, and the occupation of the internal space of the electronic device 300 is reduced.

The key structure and the electronic device disclosed in the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the key structure and the electronic device and their core ideas of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims (12)

1. A key structure, characterized by: comprises that

A substrate;

a pressure sensor disposed on the substrate; and

the pressing component is opposite to the pressure sensor, a protruding portion protruding towards the pressure sensor is arranged on the pressing component, the projection of the protruding portion on the base material is located in the projection area of the pressure sensor on the base material, and the protruding portion is used for being abutted to the pressure sensor when the key structure is pressed by external force.

2. The key structure according to claim 1, wherein: the key structure also comprises a limiting part;

the limiting part is arranged on one surface of the base material, which is provided with the pressure sensor, or the limiting part is arranged on one surface of the pressing part, which is provided with the bulge part;

the limiting component is used for limiting the distance formed between the pressure sensor and the boss when the pressure sensor is not pressed by the external force.

3. The key structure according to claim 2, wherein: the limiting component is an annular component and is arranged on the base material, the limiting component is arranged on the periphery of the pressure sensor in a surrounding mode, and the limiting component is arranged on the abutting component in a surrounding mode and is arranged on the periphery of the protruding portion.

4. The key structure according to claim 2, wherein: the thickness of the limiting part is H1, the protruding height of the pressure sensor on the base material is H2, the protruding height of the protruding part on the abutting part is H3, and H1 is more than or equal to H2+ H3;

among them, H1, H2, and H3 are all positive numbers.

5. The key structure according to claim 2, wherein: the limiting component is an elastic component.

6. The key structure according to any one of claims 1-5, wherein: the pressure sensor comprises a first piezoresistor, a second piezoresistor and a voltage detection unit, wherein the first piezoresistor comprises a first connecting end and a second connecting end, the first connecting end is used for connecting a power input end, the second piezoresistor comprises a third connecting end and a fourth connecting end, the third connecting end is connected with the second connecting end in series, the fourth connecting end is used for connecting a grounding end, the voltage detection unit is connected between the second connecting end and the third connecting end, and the voltage detection unit is used for detecting the voltages of the second connecting end and the third connecting end;

the protruding part is arranged corresponding to the first piezoresistor or the second piezoresistor and used for being abutted against the first piezoresistor or the second piezoresistor so as to enable the voltage of the first piezoresistor or the second piezoresistor to change.

7. The key structure according to any one of claims 1-5, wherein: the convex part is of a convex point structure or a convex spherical structure, and when the convex part is of the convex spherical structure, the diameter of the convex part is 0.5mm-2 mm.

8. The key structure according to any one of claims 1-5, wherein: the key structure further comprises a fingerprint identification module, the fingerprint identification module comprises a protective cover plate, a fingerprint identification chip and a flexible circuit board which are sequentially stacked, and the fingerprint identification chip is electrically connected with the flexible circuit board;

the pressing part is arranged on one surface, deviating from the fingerprint identification chip, of the flexible circuit board, the pressing part is used for reinforcing the flexible circuit board, and the pressure sensor faces the surface, deviating from the flexible circuit board, of the pressing part.

9. An electronic device, characterized in that: the electronic device comprises a housing and a key structure according to any one of claims 1 to 8, wherein the key structure is disposed in the housing, and the pressure sensor of the key structure is electrically connected to a main board in the housing.

10. The electronic device of claim 9, wherein: the casing has the front and the back that relative interval set up to and enclose in the side between front and the back, the front is equipped with the screen, the button structure is located the side of casing.

11. The electronic device of claim 10, wherein: the base material is adhered to the side face of the shell through an adhesive layer, and the adhesive layer is a pressure-sensitive adhesive tape or an elastic adhesive tape.

12. The electronic device of claim 9 or 10, wherein: the shell is provided with a first through hole, the key structure is arranged in the first through hole, and the key structure covers an opening of the first through hole, facing the outer portion of the shell.

Images