Key module and electronic equipment

Abstract

The invention discloses a key module and electronic equipment, and belongs to the technical field of keys. The key module is used for the electronic equipment, the electronic equipment comprises a frame body, and the key module comprises a circuit board, a fingerprint identification part and an elastic conductive assembly; the circuit board is arranged on the frame body; the fingerprint identification part is arranged on one side of the circuit board and is used for identifying fingerprints; the elastic conductive assembly is arranged between the circuit board and the fingerprint identification component, and two ends of the elastic conductive assembly are respectively connected with the circuit board and the fingerprint identification component; wherein the fingerprint identification part moves relative to the circuit board and is used for generating a control instruction for controlling the electronic equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of keys, and particularly relates to a key module and an electronic device. BACKGROUND

[0002] In the related art, a side key of an electronic device is provided with a fingerprint identification module, the fingerprint identification module comprises a fingerprint identification sensor and a circuit board arranged in a stack, and the fingerprint identification module is used for identifying fingerprints. The side of the circuit board away from the fingerprint identification sensor is provided with a potzai key. When the potzai key is pressed to press the fingerprint identification sensor, the fingerprint identification sensor identifies the fingerprint, and at the same time, the fingerprint identification sensor, the circuit board and the potzai key jointly move, the potzai key contacts and triggers the trigger part, and then the corresponding function is executed. However, when a user presses the side key, the circuit board is extruded by the fingerprint identification sensor and the potzai key, so that the circuit board is prone to fatigue damage or fracture, thereby reducing the service life of the circuit board. SUMMARY

[0003] The application aims to provide a key module and an electronic device, and at least one of the problems that the circuit board is extruded by the fingerprint identification sensor and the potzai key, so that the circuit board is prone to fatigue damage or fracture, thereby reducing the service life of the circuit board.

[0004] In order to solve the above technical problems, the application is implemented as follows:

[0005] In a first aspect, the application provides a key module, the key module is used for an electronic device, the electronic device comprises a frame body, the key module comprises a circuit board, a fingerprint identification component and an elastic conductive assembly; the circuit board is arranged on the frame body; the fingerprint identification component is arranged on one side of the circuit board and is used for identifying fingerprints; the elastic conductive assembly is arranged between the circuit board and the fingerprint identification component, and two ends of the elastic conductive assembly are connected with the circuit board and the fingerprint identification component respectively; wherein the fingerprint identification component moves relative to the circuit board to generate a control instruction for controlling the electronic device.

[0006] In a second aspect, the application provides an electronic device comprising the key module according to any one of the above technical solutions.

[0007] The key module provided by the application is used for an electronic device. A user can press the key module to operate the electronic device, generate a control instruction for controlling the electronic device, and then make the electronic device execute a corresponding function according to the control instruction, thereby realizing control of the electronic device. The key module comprises a circuit board, a fingerprint identification component, and an elastic conductive assembly. The fingerprint identification component is electrically connected to the circuit board through the elastic conductive assembly. When the user presses the key, the fingerprint identification component can identify the fingerprint of the finger pressing the key, thereby making the operation of the electronic device by the user more convenient. The fingerprint identification component is arranged on one side of the circuit board, and the elastic conductive assembly is arranged between the circuit board and the fingerprint identification component. When the user presses the key module, the fingerprint identification component moves relative to the circuit board, thereby making the user control the electronic device to execute a function through the key module, and further improving the convenience of the user's control of the electronic device.

[0008] When the key module is pressed, the fingerprint identification component moves relative to the circuit board, and the fingerprint identification component is connected to the circuit board through the elastic conductive assembly. The elastic conductive assembly can buffer the pressure applied by the fingerprint identification component on the circuit board while realizing the electrical connection between the fingerprint identification component and the circuit board, thereby reducing the probability of fatigue damage or fracture of the circuit board and prolonging the service life of the circuit board.

[0009] When the key module is pressed, the fingerprint identification component moves relative to the circuit board. The circuit board is arranged in the frame, so that the circuit board no longer moves with the fingerprint identification component when the key module is pressed, thereby reducing the probability of fatigue damage or fracture of the circuit board due to movement and prolonging the service life of the circuit board.

[0010] The electronic device provided by the application comprises the key module according to any one of the above technical solutions, so the electronic device comprises all the beneficial effects of the key module according to any one of the above technical solutions.

[0011] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0012] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the description of the embodiments, taken in conjunction with the following drawings in which:

[0013] Figure 1 is one of the schematic diagrams of the key module according to the embodiments of the application;

[0014] Figure 2 is the second one of the schematic diagrams of the key module according to the embodiments of the application;

[0015] Figure 3 is the third one of the schematic diagrams of the key module according to the embodiments of the application;

[0016] Figure 4 is a schematic view of an elastic conductive assembly according to an embodiment of the present application;

[0017] Figure 5 is a partial schematic view of an electronic device according to an embodiment of the present application.

[0018] Reference Signs:

[0019] 100 key module, 110 circuit board, 112 function part, 114 connecting part, 116 contact part, 120 fingerprint identification part, 130 elastic conductive assembly, 132 first conductive part, 134 second conductive part, 136 elastic member, 138 cavity, 139 opening, 142 first electrode, 144 second electrode, 150 current detection part, 160 key, 170 elastic glue, 180 board-to-board connector, 200 frame, 210 opening. DETAILED DESCRIPTION

[0020] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0022] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The key module 100 and the electronic device according to the embodiments of the present application will be described below. Figures 1 to 5 The key module 100 and the electronic device according to the embodiments of the present application will be described below.

[0025] As shown in Figure 1 , Figure 2 and Figure 3 , the key module 100 according to some embodiments of the present application, the key module 100 is used for an electronic device, the electronic device includes a frame 200, the key module 100 includes a circuit board 110, a fingerprint identification component 120 and an elastic conductive assembly 130; the circuit board 110 is arranged on the frame 200, the fingerprint identification component 120 is arranged on one side of the circuit board 110, and is used for identifying fingerprints; the elastic conductive assembly 130 is arranged between the circuit board 110 and the fingerprint identification component 120, and two ends of the elastic conductive assembly 130 are connected with the circuit board 110 and the fingerprint identification component 120 respectively; wherein the fingerprint identification component 120 moves relative to the circuit board 110, and is used for generating a control instruction for controlling the electronic device.

[0026] In this embodiment, the key module 100 is used for an electronic device, and a user can press the key module 100 to operate the electronic device, generate a control instruction for controlling the electronic device, and then make the electronic device execute a corresponding function according to the control instruction, so as to control the electronic device. The key module 100 includes a circuit board 110, a fingerprint identification component 120 and an elastic conductive assembly 130, the fingerprint identification component 120 is electrically connected with the circuit board 110 through the elastic conductive assembly 130, when a user presses the key 160, the fingerprint identification component 120 can identify the fingerprint of the finger pressing the key 160, so as to make the operation of the user on the electronic device more convenient. The fingerprint identification component 120 is arranged on one side of the circuit board 110, and the elastic conductive assembly 130 is arranged between the circuit board 110 and the fingerprint identification component 120, when the user presses the key module 100, the fingerprint identification component 120 moves relative to the circuit board 110, so that the user can control the electronic device to execute a function through the key module 100, and further improve the convenience of the user's control on the electronic device.

[0027] Since the fingerprint identification component 120 moves relative to the circuit board 110 when the key module 100 is pressed, and the fingerprint identification component 120 is connected with the circuit board 110 through the elastic conductive assembly 130, the elastic conductive assembly 130 can buffer the pressure applied by the fingerprint identification component 120 on the circuit board 110 while realizing the electrical connection between the fingerprint identification component 120 and the circuit board 110, thereby reducing the probability of fatigue damage or fracture of the circuit board 110 and prolonging the service life of the circuit board 110.

[0028] Since the fingerprint identification component 120 moves relative to the circuit board 110 when the key module 100 is pressed, the circuit board 110 is arranged in the frame 200, so that the circuit board 110 no longer moves with the fingerprint identification component 120 when the key module 100 is pressed, thereby reducing the probability of fatigue damage or fracture of the circuit board 110 due to movement and prolonging the service life of the circuit board 110.

[0029] Further, the number of elastic conductive assemblies 130 is multiple groups, and the multiple groups of elastic conductive assemblies 130 are distributed according to the wiring needs of the fingerprint identification component 120 and the circuit board 110.

[0030] The multiple groups of elastic conductive assemblies 130 can support at multiple positions between the circuit board 110 and the fingerprint identification component 120, so that the pressure applied by the fingerprint identification component 120 on the circuit board 110 is more dispersed, thereby reducing the local pressure of the circuit board 110, further reducing the probability of fatigue damage or fracture of the circuit board 110, and prolonging the service life of the circuit board 110.

[0031] Specifically, when a user presses the key module 100 of the electronic device, the user's finger contacts the fingerprint identification component 120 of the key module 100, the fingerprint identification component 120 can identify the fingerprint of the user's finger when the user's finger contacts the fingerprint identification component 120, and the user's finger will press the fingerprint identification component 120, so that the fingerprint identification component 120 moves towards the circuit board 110, at this time the circuit board 110 is fixed, the fingerprint identification component 120 moves, and the elastic conductive assembly 130 deforms, thereby determining whether the user presses the key module 100 of the electronic device by detecting the position change of the fingerprint identification component 120 or the shape change of the elastic conductive assembly 130.

[0032] Specifically, the fingerprint identification component 120 is a Land Grid Array (LGA), and the fingerprint identification component 120 is a multi-layer structure, and contains integrated circuits and integrated circuit substrates inside.

[0033] The circuit board 110 is a Flexible Printed Circuit (FPC).

[0034] Specifically, the fingerprint recognition component 120 moves relative to the circuit board 110 when the user presses the fingerprint recognition component 120.

[0035] The fingerprint recognition component 120 moves relative to the circuit board 110 when the user stops pressing the fingerprint recognition component 120 after pressing the fingerprint recognition component 120 for a certain duration.

[0036] The fingerprint recognition component 120 is stationary relative to the circuit board 110 when the user does not press the fingerprint recognition component 120.

[0037] According to some embodiments of the present application, as shown in Figure 1 The key module 100 further includes a first electrode 142 and a second electrode 144; the first electrode 142 is arranged on the fingerprint recognition component 120; the second electrode 144 is arranged on the circuit board 110 and at least partially opposite to the first electrode 142; when the fingerprint recognition component 120 moves relative to the circuit board 110, the capacitance value between the first electrode 142 and the second electrode 144 changes, so that the electronic device generates a control instruction according to the capacitance value.

[0038] In this embodiment, the key module 100 further comprises a first electrode 142 and a second electrode 144, the first electrode 142 is arranged on the fingerprint identification component 120, the second electrode 144 is arranged on the circuit board 110 and is arranged opposite to the first electrode 142, and the first electrode 142 and the second electrode 144 can form a capacitor. When the user presses the key module 100 of the electronic device with a finger, the fingerprint identification component 120 moves relative to the circuit board 110, the fingerprint identification component 120 drives the first electrode 142 to move relative to the second electrode 144 arranged on the circuit board 110, the distance between the first electrode 142 and the second electrode 144 is reduced, the capacitance value between the first electrode 142 and the second electrode 144 changes, and then the change of the capacitance value between the first electrode 142 and the second electrode 144 is used to determine whether the key module 100 is pressed, so that the electronic device can generate a control instruction according to the capacitance value. Since the key module 100 generates a control instruction for controlling the electronic device by judging the change of the capacitance value between the first electrode 142 and the second electrode 144, the key function of the key module 100 is realized, so that the key module 100 no longer needs to be provided with the physical key 160, the structure of the key module 100 is simplified, the volume of the key module 100 is reduced, and then the occupation of the internal space of the electronic device by the key module 100 is reduced, which is beneficial to the miniaturization and thinning of the electronic device. Moreover, since the key module 100 no longer needs to be provided with the physical key 160, the layout of the key module 100 is more flexible, which is beneficial to the flexibility of the overall layout of the electronic device. The first electrode 142 is arranged on the fingerprint identification component 120, and the second electrode 144 is arranged on the circuit board 110, so that the arrangement of the first electrode 142 and the second electrode 144 does not occupy additional space, further reducing the volume of the key module 100.

[0039] Specifically, when the key module 100 of the electronic device is pressed, the fingerprint identification component 120 moves relative to the circuit board 110, the fingerprint identification component 120 drives the first electrode 142 to move relative to the second electrode 144 arranged on the circuit board 110, the distance between the first electrode 142 and the second electrode 144 is reduced, and the capacitance value between the first electrode 142 and the second electrode 144 is increased. When the capacitance value exceeds a preset threshold value, the electronic device determines that the key module 100 is triggered, and then generates a control instruction, so that the electronic device performs a corresponding function.

[0040] Specifically, one of the first electrode 142 and the second electrode 144 is a transmit (Tx) line of the capacitor, and the other is a receive (Rx) line of the capacitor.

[0041] According to some embodiments of the present application, as Figure 1 and Figure 4As shown, the elastic conductive assembly 130 comprises a first conductive component 132, a second conductive component 134 and an elastic member 136; the first conductive component 132 is connected with the fingerprint identification component 120; the second conductive component 134 is connected with the circuit board 110 and slides relative to the first conductive component 132; one end of the elastic member 136 is connected with the first conductive component 132 and the other end is connected with the second conductive component 134; wherein when the fingerprint identification component 120 moves relative to the circuit board 110, the elastic member 136 is compressed.

[0042] In this embodiment, the elastic conductive assembly 130 comprises the first conductive component 132, the second conductive component 134 and the elastic member 136, which are connected in sequence to realize the electrical connection between the fingerprint identification component 120 and the circuit board 110. The first conductive component 132 and the second conductive component 134 are connected through the elastic member 136, when the first conductive component 132 moves with the fingerprint identification component 120 relative to the second conductive component 134, the elastic member 136 deforms, thereby enabling the fingerprint identification component 120 to move relative to the circuit board 110 and to be stably electrically connected with the circuit board 110, improving the stability of the key module 100 during operation. When the fingerprint identification component 120 moves relative to the circuit board 110, the elastic member 136 is compressed, and after the pressing force on the fingerprint identification component 120 disappears, the elastic member 136 can drive the fingerprint identification component 120 to reset through the first conductive component 132, further improving the stability of the key module 100 during operation.

[0043] Specifically, the elastic member 136 is a spring or other component that can deform and has conductivity, such as a spring sheet and the like.

[0044] Specifically, the elastic conductive assembly 130 itself can also be a spring, a telescopic rod, a spring sheet or other component that can deform and has conductivity.

[0045] Specifically, when the user presses the fingerprint identification component 120, the second conductive component 134 slides relative to the first conductive component 132.

[0046] When the user presses the fingerprint identification component 120 for a certain duration and stops pressing the fingerprint identification component 120, the second conductive component 134 slides relative to the first conductive component 132.

[0047] When the user does not press the fingerprint identification component 120, the second conductive component 134 is stationary relative to the first conductive component 132.

[0048] According to some embodiments of the present application, as Figure 1 and Figure 4As shown, the first conductive component 132 is provided with a cavity 138, and the elastic member 136 is arranged in the cavity 138; the cavity 138 is provided with an opening 139 at one end close to the circuit board 110, and the second conductive component 134 is inserted into the opening 139, and at least part of the second conductive component 134 extends into the cavity 138 and is connected with the elastic member 136.

[0049] In this embodiment, the first conductive component 132 is provided with a cavity 138, and the elastic member 136 is arranged in the cavity 138, so as to isolate the elastic member 136 from the outside of the first conductive component 132, avoiding interference between the elastic member 136 and other components during deformation, and improving the stability and smoothness of the compression and reset process of the elastic member 136. The cavity 138 is provided with an opening 139 at one end close to the circuit board 110, and the second conductive component 134 is inserted into the opening 139, and at least part of the second conductive component 134 extends into the cavity 138, so that the first conductive component 132 and the second conductive component 134 can be limited to each other, and the sliding path of the first conductive component 132 relative to the second conductive component 134 is maintained within a certain range, further improving the stability of the key module 100 during operation.

[0050] Further, the end of the second conductive component 134 extending into the cavity 138 is provided with a clamping portion, which is located in the cavity 138 and clamped in the opening 139 of the cavity 138, thereby reducing the probability of the second conductive component 134 completely separating from the cavity 138, and further improving the stability of the first conductive component 132 during movement.

[0051] The end of the first conductive component 132 away from the circuit board 110 has a first welding surface, and the first welding surface is welded to the fingerprint recognition component 120.

[0052] The end surface of the end of the second conductive component 134 away from the cavity 138 has a second welding surface, and the second welding surface is welded to the circuit board 110.

[0053] According to some embodiments of the present application, the elastic member 136 is a pressure-sensitive member, and when the fingerprint recognition component 120 moves relative to the circuit board 110, the resistance value of the elastic member 136 changes, so that the electronic device generates a control instruction according to the resistance value.

[0054] In this embodiment, the elastic member 136 is a pressure-sensitive member, and when the fingerprint recognition component 120 moves relative to the circuit board 110, the fingerprint recognition component 120 drives the first conductive component 132 to move, and the second conductive component 134 is fixed on the circuit board 110. The first conductive component 132 will compress the elastic member 136, thereby changing the resistance value of the elastic member 136, and then determining whether the key module 100 is pressed by the change of the resistance value of the elastic member 136, so that the electronic device can generate a control instruction according to the resistance value.

[0055] Since the electronic device can generate a control instruction according to the resistance value, the key module 100 no longer needs to be provided with the physical key 160, the structure of the key module 100 is simplified, the volume of the key module 100 is reduced, and the internal space of the electronic device is further occupied by the key module 100, which is conducive to the miniaturization and thinning of the electronic device. Moreover, since the key module 100 no longer needs to be provided with the physical key 160, the layout of the key module 100 is more flexible, which is conducive to the flexibility of the overall layout of the electronic device. The elastic member 136 is a component of the elastic conductive assembly 130, and the resistance value of the elastic member 136 is used to generate a control instruction for controlling the electronic device, to realize the key function of the key module 100, without occupying additional space due to the need for an additional pressure-sensitive component, thereby further reducing the volume of the key module 100.

[0056] Specifically, when the key module 100 of the electronic device is pressed, the fingerprint identification component 120 moves relative to the circuit board 110, the first conductive component 132 is driven by the fingerprint identification component 120 to move, and the second conductive component 134 is fixed on the circuit board 110. The first conductive component 132 will compress the elastic member 136, and the resistance value of the elastic member 136 will change. The resistance value of the elastic member 136 will increase or decrease according to the different materials of the elastic member 136. When the resistance value increases, the resistance value is greater than the preset threshold value, the electronic device determines that the key module 100 is triggered, and the electronic device executes the corresponding function. When the resistance value decreases, the resistance value is less than the preset threshold value, the electronic device determines that the key module 100 is triggered, and the electronic device executes the corresponding function.

[0057] The elastic member 136 is a metal strain gauge, and the resistance value of the elastic member 136 will increase when it is pressed. The metal strain gauge is made of metal resistance strain effect. When the metal is compressed, the internal crystal structure will change, resulting in changes in electron scattering and mobility, thereby changing the resistance. For example, the metal strain gauge material is constantan or nickel-chromium alloy, and the resistance will increase with the increase of strain when it is compressed.

[0058] The elastic member 136 is a metal foam, and the resistance value of the elastic member 136 will decrease when it is pressed. The metal foam is a porous material composed of a metal skeleton and a large number of pores. When compressed, the metal skeleton will deform, the porosity will decrease, and the contact area between the metal skeletons will increase, and the resistance will decrease. For example, the resistance of aluminum foam will gradually decrease with the increase of compression strain during the compression process.

[0059] Specifically, the material of the pressure-sensitive member is a pressure-sensitive material, for example, a pressure-sensitive resistor, which is a material that deforms under pressure and causes the resistivity to change. When the pressure-sensitive resistor is subjected to pressure, the resistance value thereof changes, which phenomenon is called "piezoresistive effect".

[0060] According to some embodiments of the present application, as shown in Figure 2 The elastic member 136 is a pressure-sensitive member, and the key module 100 further includes a current detection component 150 arranged on the circuit board 110 and configured to detect the current value of the circuit board 110, the elastic member 136 and / or the fingerprint identification component 120. When the fingerprint identification component 120 moves relative to the circuit board 110, the resistance value of the elastic member 136 changes, and the electronic device generates a control instruction according to the current value detected by the current detection component 150.

[0061] In this embodiment, the elastic member 136 is a pressure-sensitive member, and the key module 100 further includes a current detection component 150 configured to detect the current value of the circuit board 110, the elastic member 136 and / or the fingerprint identification component 120. When the fingerprint identification component 120 moves relative to the circuit board 110, the fingerprint identification component 120 drives the first conductive component 132 to move, and the second conductive component 134 is fixed on the circuit board 110. The first conductive component 132 causes the elastic member 136 to compress, thereby changing the resistance value of the elastic member 136. The current value of the loop formed by the circuit board 110, the elastic member 136 and the fingerprint identification component 120 also changes, and the change of the current value is detected by the current detection component 150 to determine whether the key module 100 is pressed, so that the electronic device can generate a control instruction according to the current value.

[0062] Since the electronic device can generate a control instruction according to the current value, the key module 100 no longer needs to be provided with a physical key 160, simplifying the structure of the key module 100 and reducing the volume of the key module 100, thereby reducing the occupation of the internal space of the electronic device by the key module 100, which is conducive to the miniaturization and thinning of the electronic device. Moreover, since the key module 100 no longer needs to be provided with a physical key 160, the layout of the key module 100 is more flexible, which is conducive to the flexibility of the overall layout of the electronic device. The elastic member 136 is a component of the elastic conductive assembly 130, and the resistance value of the elastic member 136 is used to change the current value of the loop formed by the circuit board 110, the elastic member 136 and the fingerprint identification component 120, and the change of the current value is used to generate a control instruction for controlling the electronic device, realizing the key function of the key module 100, without occupying additional space due to the need to additionally set a component for changing the current value, thereby further reducing the volume of the key module 100.

[0063] Specifically, when the key module 100 of the electronic device is pressed, the fingerprint recognition component 120 moves relative to the circuit board 110, the first conductive component 132 is driven to move by the fingerprint recognition component 120, the second conductive component 134 is fixed on the circuit board 110, the elastic member 136 is compressed by the first conductive component 132, and the resistance value of the elastic member 136 changes. The resistance value of the elastic member 136 changes according to the material of the elastic member 136. When the resistance value increases, the voltage of the circuit formed by the circuit board 110, the elastic member 136 and the fingerprint recognition component 120 does not change, the current value of the circuit formed by the circuit board 110, the elastic member 136 and the fingerprint recognition component 120 decreases, and the current value is less than a preset threshold value. The electronic device determines that the key module 100 is triggered, and thus the electronic device performs a corresponding function. When the resistance value decreases, the voltage of the circuit formed by the circuit board 110, the elastic member 136 and the fingerprint recognition component 120 does not change, the current value of the circuit formed by the circuit board 110, the elastic member 136 and the fingerprint recognition component 120 increases, and the current value is greater than the preset threshold value. The electronic device determines that the key module 100 is triggered, and thus the electronic device performs a corresponding function.

[0064] The elastic member 136 is a metal strain gauge, and the resistance value of the elastic member 136 increases when the elastic member 136 is compressed. The metal strain gauge is made of metal and has a resistance strain effect. When the metal is compressed, the crystal lattice structure inside the metal changes, causing scattering and mobility of electrons to change, thereby changing the resistance. For example, the metal strain gauge material is constantan or nickel-chromium alloy, and the resistance increases with the increase of strain when the metal is compressed.

[0065] The elastic member 136 is a metal foam, and the resistance value of the elastic member 136 decreases when the elastic member 136 is compressed. The metal foam is a porous material composed of a metal skeleton and a large number of pores. When compressed, the metal skeleton deforms, the porosity decreases, the contact area between the metal skeletons increases, and the resistance decreases. For example, the resistance of aluminum foam gradually decreases with the increase of compression strain during the compression process.

[0066] Specifically, the current detection component 150 is a current sensing integrated circuit (IC).

[0067] According to some embodiments of the present application, as shown in Figure 3 The key module 100 further includes a key 160, which is arranged between the fingerprint recognition component 120 and the circuit board 110 and connected to the fingerprint recognition component 120. When the fingerprint recognition component 120 moves relative to the circuit board 110, the key 160 is triggered, and the electronic device generates a control instruction according to the trigger state of the key 160.

[0068] In this embodiment, the key 160 is connected with the fingerprint identification component 120, when the fingerprint identification component 120 moves relative to the circuit board 110, the key 160 is triggered, and the electronic device generates a control instruction according to the triggering state of the key 160; since the key 160 moves with the fingerprint identification component 120, the circuit board 110 will not move, so as to reduce the probability of fatigue damage or fracture of the circuit board 110 due to reciprocating movement, and further prolong the service life of the circuit board 110.

[0069] Specifically, when the key module 100 of the electronic device is pressed, the fingerprint identification component 120 moves relative to the circuit board 110, the fingerprint identification component 120 drives the key 160 to move, and the circuit board 110 is fixed. When the downstroke is large enough, the key 160 will be deformed under the extrusion of the circuit board 110, and when the deformation amount exceeds the stroke requirement of the key 160 triggering, the electronic device judges that the key module 100 is triggered, and the electronic device executes the corresponding function.

[0070] According to some embodiments of the present application, the control instruction includes at least one of a power-on instruction, a power-off instruction, a screen wake-up instruction, a screen locking instruction, a photographing instruction, and a volume adjustment instruction.

[0071] In this embodiment, the control instruction includes at least one of a power-on instruction, a power-off instruction, a screen wake-up instruction, a screen locking instruction, a photographing instruction, and a volume adjustment instruction, further improving the convenience of user control of the electronic device.

[0072] According to some embodiments of the present application, as shown in Figure 1 , Figure 2 and Figure 3 , the key module 100 further includes an elastic glue 170, which is arranged between the circuit board 110 and the fingerprint identification component 120 and covers the elastic conductive assembly 130.

[0073] In this embodiment, the elastic glue 170 is filled between the circuit board 110 and the fingerprint identification component 120, and when the fingerprint identification component 120 moves relative to the circuit board 110 under pressure, the elastic glue 170 deforms, thereby ensuring smoother movement of the fingerprint identification component 120. After the force on the fingerprint identification component 120 disappears, the elastic member 136 returns to its original state. Since the elastic glue 170 is filled between the circuit board 110 and the fingerprint identification component 120, the elastic member 136 can prevent dust or water vapor from invading the key module 100, thereby improving the waterproof and dustproof effect of the key module 100, and further improving the reliability of the key module 100 during work.

[0074] The electronic device according to some embodiments of the present application includes the key module 100 according to any of the above embodiments.

[0075] The electronic device provided in the embodiments of the present application comprises the key module 100 of any of the above embodiments, and thus has all the advantages of the key module 100 of any of the above embodiments.

[0076] Further, the electronic device comprises a mobile phone, a tablet computer, a smart wearable device, an e-book or a notebook computer.

[0077] According to some embodiments of the present application, as shown in Figure 5 The frame 200 is provided with an opening 210, the fingerprint identification component 120 is arranged in the opening 210, and the circuit board 110 is arranged on the frame 200.

[0078] In this embodiment, the circuit board 110 is arranged on the frame 200, thereby fixing the circuit board 110, so that the circuit board 110 no longer moves with the key module 100 being pressed, reducing the probability of fatigue damage or fracture of the circuit board 110 due to movement, and prolonging the service life of the circuit board 110.

[0079] Further, the opening 139 is arranged on the side of the frame 200, and the key module 100 is a side key 160 of the electronic device.

[0080] Further, as shown in Figure 1 、 Figure 2 and Figure 3 The circuit board 110 comprises a functional part 112, a connecting part 114 and a contact part 116. The functional part 112 is welded with the elastic conductive assembly 130 to realize conduction. The functional part 112 is fixed on the frame 200 of the electronic device by means of back glue or point glue. When the fingerprint identification component 120 is pressed, the functional part 112 is fixed and only the fingerprint identification component 120 and the elastic conductive assembly 130 move or deform. The connecting part 114 is a connecting area of the functional part 112. The connecting part 114 can be bent to facilitate the assembly of the whole machine. The contact part 116 is a contact area of the circuit board 110. The circuit board 110 is welded with a board-to-board connector 180 (BTB). The functional parts are interconnected through the board-to-board connector 180. The connection mode is not limited to the board-to-board connector 180, and the interconnection conduction can also be realized by the gold surface provided on the circuit board 110 and the spring on the mainboard of the electronic device.

[0081] When the second electrode 144 is arranged on the circuit board 110, the second electrode 144 is arranged on the functional part 112.

[0082] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. It is emphasized that each of these terms refers to a specific feature, structure, material or characteristic described in connection with a particular embodiment or example. The descriptive terms are not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0083] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A key module, characterized in that: The key module is used for an electronic device, and the electronic device includes a frame, and the key module includes: A circuit board, wherein the circuit board is arranged in the frame; A fingerprint recognition component is provided on one side of the circuit board and is used for identifying fingerprints; an elastic conductive component, the elastic conductive component being disposed between the circuit board and the fingerprint recognition component, and having two ends thereof connected to the circuit board and the fingerprint recognition component respectively; The fingerprint recognition component moves relative to the circuit board to generate a control instruction for controlling the electronic device.

2. The key module according to claim 1, characterized in that: Also includes: a first electrode, the first electrode being disposed on the fingerprint recognition component; a second electrode, the second electrode being disposed on the circuit board and at least partially opposite to the first electrode; When the fingerprint recognition component moves relative to the circuit board, the capacitance value between the first electrode and the second electrode changes, so that the electronic device generates the control instruction according to the capacitance value.

3. The key module according to claim 1, characterized in that: The elastic conductive component includes: a first conductive component connected to the fingerprint recognition component; a second conductive component connected to the circuit board and sliding relative to the first conductive component; an elastic member, one end of the elastic member being connected to the first conductive member, and the other end of the elastic member being connected to the second conductive member; Wherein, when the fingerprint recognition component moves relative to the circuit board, the elastic member is compressed.

4. The key module according to claim 3, characterized in that: The first conductive component is provided with a cavity, and the elastic member is provided in the cavity; An opening is provided at one end of the cavity close to the circuit board, and the second conductive component is inserted into the opening. At least a portion of the second conductive component extends into the cavity and is connected to the elastic member.

5. The key module according to claim 3, characterized in that: The elastic member is a pressure-sensitive member. When the fingerprint recognition component moves relative to the circuit board, the resistance value of the elastic member changes, so that the electronic device generates the control instruction according to the resistance value.

6. The key module according to claim 3, characterized in that: The elastic member is a pressure-sensitive member, and the key module further includes: a current detection component, the current detection component being provided on the circuit board and being used to detect the current value of the circuit board, the elastic member and / or the fingerprint recognition component; When the fingerprint recognition component moves relative to the circuit board, the resistance value of the elastic member changes, and the electronic device generates the control instruction according to the current value detected by the current detection component.

7. The key module according to claim 1, characterized in that: Also includes: A button, the button being arranged between the fingerprint recognition component and the circuit board and connected to the fingerprint recognition component; When the fingerprint recognition component moves relative to the circuit board, the button is triggered, and the electronic device generates the control instruction according to the triggering state of the button.

8. The key module according to any one of claims 1 to 7, characterized in that: The control instruction includes at least one of a power on instruction, a power off instruction, a screen wake up instruction, a screen lock instruction, a photo taking instruction and a volume adjustment instruction.

9. The key module according to any one of claims 1 to 7, characterized in that: Also includes: Elastic glue is arranged between the circuit board and the fingerprint recognition component and covers the elastic conductive component.

10. An electronic device, characterized in that: The invention comprises a key module as claimed in any one of claims 1 to 9.

11. The electronic device according to claim 10, characterized in that The frame is provided with an opening; The fingerprint identification component is arranged in the opening.

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