Press sensing component and terminal device

Abstract

The present disclosure relates to a pressure sensing component and a terminal device. The pressure sensing component includes: a transmitting element, which is used to transmit ultrasonic waves; a receiving element, which is arranged adjacent to the transmitting element and is used to receive reflected waves after the ultrasonic waves are reflected; a reflecting pad, which is arranged on one side of the transmitting element and the receiving element, and the first surface of the reflecting pad abuts against the transmitting element and the receiving element; when the other side of the transmitting element and / or the receiving element is pressed, the reflecting pad is deformed in the area corresponding to the pressing, and the medium density in the deformed area increases. By setting the reflecting pad whose medium density changes when deformed to abut against the transmitting element and the receiving element, the transmitting element transmits ultrasonic waves to one side of the reflecting pad, and the receiving element receives the reflected waves, so that when the user presses, a pressing instruction can be generated according to the change in the intensity of the reflected wave, which can make the instruction more reliable and avoid the phenomenon of false touch.

Description

Technical Field

[0001] The present disclosure relates to the field of terminal control technology, and in particular to a pressure sensing component and a terminal device. Background Art

[0002] At present, in some terminal devices such as mobile phones and tablet computers, touch screens are generally used for control. At the same time, mechanical buttons such as lock screen buttons and volume adjustment buttons are set on the side of the terminal device, that is, on the outer wall perpendicular to the touch screen. In some scenarios, such as when playing some games, the terminal device needs to be displayed and operated in landscape mode. Since some games are highly operational, in addition to the operations in the thumb area below, there are other operations to meet complex instructions. The current terminal devices cannot realize complex operating functions, or buttons are set on the outer wall, but the operation is inconvenient and unreliable, and cannot meet user needs, resulting in poor user experience. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a pressure sensing component and a terminal device.

[0004] According to a first aspect of an embodiment of the present disclosure, a pressure sensing component is provided, comprising: a transmitting element, the transmitting element being used to transmit ultrasonic waves; a receiving element, the receiving element being arranged adjacent to the transmitting element, and being used to receive reflected waves of the ultrasonic waves after being reflected; a reflecting pad, the reflecting pad being arranged on one side of the transmitting element and the receiving element, and the first surface of the reflecting pad being in contact with the transmitting element and the receiving element; wherein, when the other side of the transmitting element and / or the receiving element is pressed, the reflecting pad is deformed in an area corresponding to the pressing, and the medium density in the deformed area is increased.

[0005] In one embodiment, the dielectric density m of the reflective pad satisfies 1 kg / m 3 ≤m≤1.5kg / m 3 .

[0006] In one embodiment, the reflective pad is made of rubber.

[0007] In one embodiment, the pressure sensing component also includes: a support plate, which is arranged on the second surface of the reflective pad, covering at least the area corresponding to the transmitting element and the receiving element, and the support plate and the reflective pad have different medium densities, wherein the second surface is opposite to the first surface.

[0008] In one embodiment, the support plate is rigid, and the medium density of the support plate is greater than or equal to 1000 kg / m 3 .

[0009] According to a second aspect of an embodiment of the present disclosure, a terminal device is provided, and the terminal device includes: a pressure sensing component as described in the first aspect.

[0010] In one embodiment, the terminal device also includes a middle frame; the back side of the transmitting element is arranged on the inner side of the middle frame; the back side of the receiving element is arranged on the inner side of the middle frame; a reflection pad, the reflection pad is arranged on the inner side of the transmitting element and the receiving element, and the first surface of the reflection pad is in contact with the transmitting element and the receiving element; wherein, when the outer side surface of the middle frame is pressed, the reflection pad is deformed in the area corresponding to the pressing, and the medium density in the deformed area increases.

[0011] In one embodiment, the terminal device further includes: a fixing clip, one end of which is fixedly connected to the middle frame, and the other end of which is arranged on the second surface of the reflective pad.

[0012] In one embodiment, the middle frame includes at least one of the following materials: plastic, plastic, metal, and malondialdehyde.

[0013] In one embodiment, the thickness of the middle frame is greater than or equal to 1.6 mm.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by setting a reflective pad whose medium density changes when deformed to abut against the transmitting element and the receiving element, the transmitting element transmits ultrasonic waves to one side of the reflective pad, and the receiving element receives the reflected waves, so that when the user presses, a pressing instruction can be generated according to the intensity change of the reflected wave, which can make the instruction more reliable and avoid phenomena such as false touches.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 It is a structural schematic diagram of a sensing component according to a related technology.

[0018] Figure 2 The present invention is a structural schematic diagram of a sensing component being touched according to a related technology.

[0019] Figure 3 The present invention is a schematic diagram of the structure of a terminal device according to an exemplary embodiment of the present invention.

[0020] Figure 4It is a structural schematic diagram of a pressure sensing component according to an exemplary embodiment of the disclosure.

[0021] Figure 5 It is a structural schematic diagram showing a pressed state of a pressure sensing component according to an exemplary embodiment of the disclosure.

[0022] Figure 6 The present invention is a schematic diagram of an exploded structure of a transmitting element and a receiving element according to an exemplary embodiment of the present invention.

[0023] Figure 7 The present invention is a schematic structural diagram of a transmitting element and a receiving element according to an exemplary embodiment of the present invention.

[0024] Figure 8 It is a schematic structural diagram of another pressure sensing component according to an exemplary embodiment of the disclosure.

[0025] Fig. 9 It is a structural schematic diagram showing another press sensing component in a pressed state according to an exemplary embodiment of the disclosure.

[0026] Fig.10 is a flow chart of a pressure sensing control method according to another exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] At present, in some related technologies, mechanical buttons are set on the side of the terminal device, and by pressing the buttons, corresponding instructions are generated to complete corresponding operations. However, in order to facilitate operation, the mechanical buttons need to protrude from the side wall plane, which affects the appearance. In addition, many terminal devices are currently equipped with lock screen buttons, volume buttons, etc. on the side walls. Adding mechanical buttons can easily cause confusion.

[0029] In other related technologies, the display screen of the terminal device adopts a curved screen, which extends to the side wall, and determines the user's command through the touch sensing of the touch screen. However, touch sensing is based on contact and is too sensitive, which makes it easy to cause false touches.

[0030] In some other related technologies, such as Figure 1 , Figure 2As shown, an ultrasonic sensing element is arranged inside the middle frame 11 on the side of the terminal device, including a transmitting element (Transmit, TX) 12 and a receiving element (Receive, RX) 13. Through the positive effect and reverse effect of piezoelectric ceramics, the mutual conversion of kinetic energy and electrical signals is realized to realize the side key sensing function. The transmitting element 12 and the receiving element 13 are both generators and receivers processed with piezoelectric ceramic materials, wherein the current drives the transmitting element 12 to generate ultrasonic waves, the electrical energy is converted into kinetic energy, and the ultrasonic wave 101 is emitted outward; when the receiving element 13 receives the reflected wave 102 of the ultrasonic wave, the vibration is converted into an electrical signal through the vibration of the piezoelectric ceramic. According to the principle of ultrasonic waves, the intensity of ultrasonic waves will gradually decay during the propagation process, and reflection will occur when encountering materials with different medium densities to form a reflected wave, and the greater the difference in medium density, the more reflections there are, and the greater the intensity of the reflected wave.

[0031] Based on this, when there is no finger touch, such as Figure 1 As shown, the ultrasonic wave 101 emitted by the transmitting element 12 passes through the middle frame 11 and the outside air in turn. Since the medium density of the air is different from that of the middle frame 11, the ultrasonic wave 101 is reflected to form a reflected wave 102. The reflection amount at this time is defined as M. When a finger touches, Figure 2 As shown, the ultrasonic wave 101 passes through the middle frame 11 and the finger in sequence. Since the medium density of the finger is different from that of the middle frame 11, the ultrasonic wave is reflected to form a reflected wave 102, and the reflection amount is N. Since the difference in medium density between the finger and the middle frame 11 is smaller than the difference in medium density between air and the middle frame 11, the reflection amount M is greater than the reflection amount N. The finger touch is determined by detecting the difference in ultrasonic reflection amount before and after the finger touches, δ=MN.

[0032] The air density is 1kg / m 3 Up to 2kg / m 3 , the density of the finger is about 1000kg / m 3 In order to ensure that the difference is obvious, the middle frame 11 needs to be set to metal, and the thickness cannot exceed 1.6mm to ensure the propagation of ultrasonic waves.

[0033] In the above method, similar to the previous technology, the button is triggered by the touch of a finger, which can easily cause an accidental touch, and the middle frame 11 needs to be made of metal and cannot exceed 1.6 mm.

[0034] In order to solve the above technical problems, Figure 3 , Figure 4 , Figure 5As shown, the present disclosure provides a pressure sensing component 21, which can be applied to a terminal device 20 such as a mobile phone, using ultrasonic technology, and needs to generate instructions by pressing to complete the operation, rather than by touch, thereby avoiding the occurrence of accidental touch. In addition, the middle frame 22 can be made of different materials and different thicknesses, so as to meet the needs of different terminal devices.

[0035] like Figure 4 , Figure 5 As shown, the pressure sensing component 21 may include: a transmitting element 212 , a receiving element 213 and a reflective pad 214 .

[0036] The transmitting element 212 is used to transmit the ultrasonic wave 201 .

[0037] The receiving element 213 is disposed adjacent to the transmitting element 212, and is used to receive the reflected wave 202 after the ultrasonic wave 201 is reflected. The receiving element 213 and the transmitting element 212 can be disposed side by side and at a close distance, so that the reflected wave 202 after the ultrasonic wave 201 emitted by the transmitting element 212 can be received more accurately. The reflected wave 202 in the present disclosure is also an ultrasonic wave, and is referred to as the reflected wave 202 for the convenience of description only.

[0038] The reflective pad 214 is disposed on one side of the emitting element 212 and the receiving element 213, and the first surface of the reflective pad 214 abuts against the emitting element 212 and the receiving element 213. When the other side of the emitting element 212 and the receiving element 213 is pressed, the reflective pad 214 is deformed in the area corresponding to the pressing, and the medium density in the deformed area increases.

[0039] In the embodiment of the present disclosure, a reflection pad 214 is provided on one side of the transmitting element 212 and the receiving element 213. The reflection pad 214 may extend beyond the area where the transmitting element 212 and the receiving element 213 are provided; or it may be provided corresponding to the transmitting element 212 and the receiving element 213, that is, it is provided only in the area where the transmitting element 212 and the receiving element 213 are installed according to the range of the pressing area. The first surface of the reflection pad 214 abuts against the transmitting element 212 and the receiving element 213, so that the ultrasonic wave 201 emitted by the transmitting element 212 can directly enter the reflection pad 214, avoiding the reflection caused by the ultrasonic wave 201 passing through the air or other media after being emitted from the transmitting element 212 and then entering the reflection pad 214, resulting in signal interference and ultrasonic wave intensity loss. Similarly, it also avoids the loss of the ultrasonic wave 201 in the path of being transmitted to the receiving element 213 after being reflected by the medium on the back side of the reflection pad 214. At the same time, more importantly, when the other side of the emitting element 212 and the receiving element 213 are pressed, the emitting element 212 and the receiving element 213 are pushed inward, so that the reflecting pad 214 in this area is deformed. Therefore, the reflecting pad 214 is always in contact with the emitting element 212 and the receiving element 213 so that the corresponding deformation can be accurately and reliably generated when pressed, avoiding errors caused by gaps.

[0040] The transmitting element 212 and the receiving element 213 can be installed in the area that needs to be pressed, that is, the position that needs to be pressed and operated by the press sensing component 21. For example, they can be set on the inner side of the middle frame 22 of the terminal device 20, or on the inner side of the components that need to be pressed in other devices. By pressing the components inward, the transmitting element 212 and the receiving element 213 are pushed inward, thereby causing the reflective pad 214 in the area to deform.

[0041] In some cases, the transmitting element 212 and the receiving element 213 can be arranged adjacent to each other, or a receiving element 213 can be arranged on both sides of a transmitting element 212, or a transmitting element 212 can be arranged on both sides of a receiving element 213; or multiple transmitting elements 212 and multiple receiving elements 213 are arranged, and the transmitting elements 212 and the receiving elements 213 are arranged alternately in a row or in a matrix array. The number setting and arrangement method can be determined according to the position and area of ​​the area to be pressed, and the transmitting elements 212 and the receiving elements 213 are distributed inside the area to be pressed, so that when the area is pressed, the corresponding signal can be accurately and reliably obtained.

[0042] The transmitting element 212 and the receiving element 213 can both be a transmitter and a receiver made of piezoelectric ceramic materials. The transmitting element 212 is fed with a current signal to convert electrical energy into kinetic energy to generate ultrasonic waves, while the receiving element 213 receives ultrasonic waves and converts kinetic energy into electrical signals through the vibration of piezoelectric ceramics. Figure 6 , Figure 7 As shown, the transmitting element 212 and the receiving element 213 can be respectively attached to the flexible printed circuit (Flexible Printed Circuit, FPC) 215 by surface mounting technology (Surface Mounted Technology, SMT), and can be supported by a base layer 216 such as a resin material on the back side. During assembly, the transmitting element 212 and the receiving element 213 can be glued on the back side of the transmitting element 212 and the receiving element 213, and can be attached to the inner side of the middle frame 22 of the terminal device 20 or the pressing component of other devices. At the same time, the inner side can be supported by a reflective pad 214 against the transmitting element 212 and the receiving element 213.

[0043] In the disclosed embodiment, the user can press the corresponding position, so that the transmitting element 212 and the receiving element 213 push the reflective pad 214 inward, so that the reflective pad 214 is deformed, thereby changing the medium density of the reflective pad 214. Since the medium of the reflective pad 214 and the medium inside the reflective pad 214 are different, when the reflective pad 214 changes the medium density, the density difference between the reflective pad 214 and the medium inside the reflective pad 214 also changes accordingly, thereby causing the ultrasonic wave 201 emitted inward by the transmitting element 212 to change the intensity of the reflected wave 202 formed by the density difference after passing through the reflective pad 214. After receiving the reflected wave 202, the receiving element 213 can determine whether it is pressed according to the intensity of the reflected wave 202. For example, a threshold value may be preset. When the intensity of the reflected wave 202 received by the receiving element 213 exceeds or is equal to the threshold value, the terminal device 20 may determine that the middle frame 22 is pressed, and then generate a corresponding pressing instruction. The so-called reflected wave 202 intensity exceeding the threshold value may be less than the threshold value or greater than the threshold value, which depends on the density of the medium inside the reflection pad 214, that is, before and after the reflection pad 214 is squeezed and deformed, whether the density difference between the reflection pad 214 and the medium inside the reflection pad 214 increases or decreases. If the density difference between the reflection pad 214 and the medium inside the reflection pad 214 increases in the deformed state, according to the principle of reflected waves, the reflection pad 214 is pressed. The intensity of the reflected wave 202 increases when the reflection pad 214 is pressed. The threshold at this time can be preset to be greater than the intensity of the reflected wave 202 in the unpressed state. When it is detected that the intensity of the reflected wave 202 is greater than or equal to the threshold, the terminal device 20 determines that it is pressed; on the other hand, if the density difference between the reflection pad 214 and the medium inside the reflection pad 214 decreases in the deformed state, according to the principle of reflected waves, the intensity of the reflected wave 202 decreases when the reflection pad 214 is pressed. The threshold at this time can be preset to be less than the intensity of the reflected wave 202 in the unpressed state. When it is detected that the intensity of the reflected wave 202 is less than or equal to the threshold, the terminal device 20 determines that it is pressed.

[0044] The disclosed embodiment utilizes the reflection principle of ultrasound, that is, during the propagation process, the amount of ultrasound reflected is positively correlated with the density difference between the media. According to the reflection principle of ultrasound, when ultrasound propagates between media, it will be reflected, and the amount of reflection is positively correlated with the density difference between the media. The density difference here refers to the absolute value of the data subtracted from the density of the two media, that is, it has nothing to do with the relationship between the density of the two media before and after. For example, in the following two cases: the density of the medium that enters first is A, and the density of the medium that enters later is B; or the density of the medium that enters first is B, and the density of the medium that enters later is A. The density difference of the two cases is the same: |AB|.

[0045] In this embodiment, for sensing ultrasound and generating instructions, it is necessary to determine whether it is pressed, that is, it is necessary to determine it through the ultrasonic change before and after pressing. Based on the above principle, the greater the change of the ultrasonic wave before and after pressing, the more accurate the judgment. For example, the reflection intensity of the reflected wave is low before pressing, and the reflection intensity is high after pressing; or conversely, the reflection wave intensity is relatively high before pressing, and the reflection intensity is relatively low after pressing. In order to ensure the effect of detection, on the one hand, the reflection pad 214 can be made of a material with a large change in medium density before and after deformation. On the other hand, according to the aforementioned ultrasonic reflection principle, the density difference is the absolute value of the subtraction of the densities of the two media. Therefore, it is necessary to avoid the density difference between the reflection pad 214 and the medium inside the reflection pad 214 before and after deformation being close.

[0046] In one embodiment, the dielectric density of the reflective pad 214 is m and satisfies 1 kg / m 3 ≤m≤1.5kg / m 3 In this embodiment, the medium density of the reflection pad 214 is close to the density of air. In some cases, the medium inside the reflection pad 214 can be air, that is, no other components are arranged inside the reflection pad 214 or at least inside the area corresponding to the transmitting element 212 and the receiving element 213. At this time, due to the close density, the ultrasonic wave 201 emitted from the transmitting element 212 has a small amount of reflection when it enters the air after passing through the reflection pad 214, so the intensity of the reflected wave 202 received by the receiving element 213 is low. After the reflection pad 214 is squeezed and deformed, the density increases and is greater than the density of air, so that the density difference before and after the deformation is significantly different. Therefore, after being pressed, when the ultrasonic wave 201 emitted by the transmitting element 212 passes through the reflection pad 214 and enters the air, due to the large density difference, the reflection amount will be high, so that the intensity of the reflected wave 202 that can be received by the receiving element 213 is also relatively high. Through the significant change in the intensity of the reflected wave 202 received by the receiving element 213 before and after, it can be judged whether it is pressed, and the reliability and accuracy of the result can be guaranteed.

[0047] In some embodiments, the material of the reflective pad 214 may be rubber. In this embodiment, flexible rubber is used as the reflective pad 214, so that the reflective pad 214 can be more easily deformed when squeezed, thereby being able to change its density to a greater extent. The material of the reflective pad 214 may also be other flexible materials.

[0048] In some embodiments, Figure 8 , Fig. 9As shown, the pressure sensing component 21 may further include: a support plate 217, the support plate 217 is arranged on the second surface of the reflective pad 214, at least covers the area corresponding to the emitting element 212 and the receiving element 213, and the support plate 217 and the reflective pad 214 have different medium densities, wherein the second surface is opposite to the first surface. In this embodiment, a support plate 217 is arranged on the second surface of the reflective pad 214, that is, the inner side of the reflective pad 214, and the support plate 217 may be made of a relatively rigid material, which can support the reflective pad 214 on the inner side of the reflective pad 214, and when the first surface of the reflective pad 214 is pushed and deformed by the emitting element 212 and the receiving element 213, the support plate 217 supports the second surface of the reflective pad 214, so that the squeezed part of the reflective pad 214 will not be displaced, and the pushing force is offset, resulting in a reduction in the deformation amount. Through the support plate 217, the deformation amount of the reflective pad 214 can be guaranteed, thereby also ensuring the change in the medium density of the reflective pad 214 before and after the deformation by being squeezed.

[0049] At the same time, the support plate 217 is in contact with the second surface of the reflection pad 214, so that when the ultrasonic wave passes through the reflection pad 214 and enters the support plate 217, it is reflected, that is, two media for reflecting the ultrasonic wave are formed, namely, the reflection pad 214 and the support plate 217. According to the aforementioned principle of ultrasonic reflection, in some embodiments, the support plate 217 can be made of metal, and the medium density can be greater than or equal to 1000kg / m 3 , the medium density of the support plate 217 can generally be greater than the medium density of the reflective pad 214, so that when not pressed, the density difference between the reflective pad 214 and the support plate 217 is large, and the ultrasonic wave 201 emitted by the transmitting element 212 generates a large amount of reflection when passing through the reflective pad 214 and entering the support plate 217, so that the intensity of the reflected wave 202 that the receiving element 213 can receive will be relatively high. When pressed, the reflective pad 214 is deformed, and the medium density increases, so that the density difference between the reflective pad 214 and the support plate 217 becomes smaller, and the intensity of the reflected wave 202 is reduced, which can be used to determine whether it is pressed.

[0050] By using the pressure sensing component 21 of any of the above embodiments, the risk of accidental touching of a controllable button disposed on the surface of the terminal device 20 or other devices can be reduced.

[0051] Based on the same concept, the present disclosure also provides a terminal device 20, such as Figure 3 As shown, the terminal device 20 of the present disclosure may include a display screen, and also include a pressure sensing component 21 as in any of the aforementioned embodiments.

[0052] The terminal device 20 provided by the present disclosure can enrich the control methods by setting the pressure sensing component 21 of any of the aforementioned embodiments. Especially in some horizontal screen operation scenarios, the user can conveniently press the corresponding pressing area of ​​the pressure sensing component 21 to generate corresponding instructions and implement corresponding functions. In use, when the finger touches the pressure sensing component 21, no instructions will be generated. Only by pressing with a certain force and causing a certain degree of deformation can instructions be generated, thereby reducing the risk of accidental touch.

[0053] In some embodiments, Figure 4 , Figure 5 As shown, the terminal device 20 may include: a middle frame 22. The middle frame 22 may be a frame body forming an outer side wall of the terminal device 20, used to support some components of the terminal device 20, and also plays a role of sealing and protection.

[0054] The back side of the transmitting element 212 is arranged on the inner side of the middle frame 22, and is used to transmit the ultrasonic wave 201. In the disclosed embodiment, the back side of the transmitting element 212 is arranged on the middle frame 22, so as to transmit the ultrasonic wave 201 toward the inner side of the terminal device 20, and reflect based on the internal elements, thereby avoiding the risk of accidental touch caused by external touch.

[0055] The back side of the receiving element 213 is disposed on the inner side of the middle frame 22 for receiving the reflected wave 202 after the ultrasonic wave 201 is reflected.

[0056] In some cases, the number and arrangement of the transmitting elements 212 and the receiving elements 213 can be determined according to the position and area of ​​the pressing area set on the middle frame 22, and the transmitting elements 212 and the receiving elements 213 are distributed on the inner side of the area of ​​the middle frame 22 that needs to be pressed, so that when the area is pressed, the corresponding signal can be accurately and reliably obtained.

[0057] The reflective pad 214 is disposed on the inner side of the emitting element 212 and the receiving element 213, and the first surface of the reflective pad 214 abuts against the emitting element 212 and the receiving element 213; wherein, when the outer side surface of the middle frame 22 is pressed, the reflective pad 214 is deformed corresponding to the pressed area, and the medium density in the deformed area increases. In the disclosed embodiment, the reflective pad 214 is disposed on the inner side of the emitting element 212 and the receiving element 213, and the reflective pad 214 can be disposed on the complete inner side surface of the middle frame 22, or can be disposed corresponding to the emitting element 212 and the receiving element 213, that is, it is only disposed in the area where the emitting element 212 and the receiving element 213 are assembled according to the range of the pressed area. The first surface of the reflection pad 214 is the surface facing the side of the middle frame 22, and is in contact with the transmitting element 212 and the receiving element 213, so that the ultrasonic wave 201 emitted by the transmitting element 212 can directly enter the reflection pad 214, avoiding the reflection caused by the ultrasonic wave 201 passing through the air or other media before entering the reflection pad 214 after being emitted from the transmitting element 212, resulting in signal interference and ultrasonic wave intensity loss. Similarly, it also avoids the loss of the ultrasonic wave 201 in the path of being transmitted to the receiving element 213 after being reflected by the medium inside the reflection pad 214. At the same time, more importantly, when the middle frame 22 is pressed inward on the outside, the middle frame 22 drives the transmitting element 212 and the receiving element 213 to push inward, so that the reflection pad 214 in this area is deformed. Therefore, the reflection pad 214 is always in contact with the transmitting element 212 and the receiving element 213 so that the corresponding deformation can be accurately and reliably generated when pressed, avoiding errors caused by gaps.

[0058] Multiple groups of transmitting elements 212 and corresponding multiple groups of receiving elements 213 can be set on the middle frame 22, and a control area that the user can press to operate is formed at the position where the transmitting elements 212 and the receiving elements 213 are set. The control area can be set on one side of the display screen of the terminal device 20, located near the top and bottom of the middle frame 22 on this side. When the user operates the screen horizontally, the control area is located at both ends of the top of the horizontal screen, which is convenient for the user to press with the index finger when holding it with both hands. In the control area, a corresponding pattern can be formed on the outer surface of the middle frame 22 to mark the position of the control area, so that the user can accurately press the corresponding position. By pressing, the middle frame 22 in the control area is deformed inward to a certain extent, driving the transmitting element 212 and the receiving element 213 to push the reflective pad 214 inward, causing the reflective pad 214 to deform. Changing the medium density of the reflection pad 214 also changes the density difference between the reflection pad 214 and the medium inside the reflection pad 214, thereby changing the intensity of the reflected wave when the ultrasonic wave emitted inward by the transmitting element 212 passes through the reflection pad 214 and enters the medium inside the reflection pad 214.

[0059] like Figure 6 , Figure 7As shown, the emitting element 212 and the receiving element 213 can be respectively attached to the flexible circuit board 215 by surface mounting technology, and can be supported by a base layer 216 such as a resin material on the back side. During assembly, the emitting element 212 and the receiving element 213 can be glued on the back side and attached to the inner side of the middle frame 22. At the same time, the inner side can be supported by a reflective pad 214 against the emitting element 212 and the receiving element 213.

[0060] In the disclosed embodiment, the user can press the corresponding position, so that the middle frame 22 is deformed inward to a certain extent, driving the transmitting element 212 and the receiving element 213 to push the reflecting pad 214 inward, so that the reflecting pad 214 is deformed, thereby changing the medium density of the reflecting pad 214. Since the reflecting pad 214 and the medium inside the reflecting pad 214 are different, when the reflecting pad 214 changes the medium density, the density difference between the reflecting pad 214 and the medium inside the reflecting pad 214 also changes accordingly, thereby causing the ultrasonic wave 201 emitted inward by the transmitting element 212 to change the intensity of the reflected wave 202 formed by the density difference after passing through the reflecting pad 214. After receiving the reflected wave 202, the receiving element 213 can determine whether the middle frame 22 is pressed according to the intensity of the reflected wave 202. For example, a threshold value may be preset. When the intensity of the reflected wave 202 received by the receiving element 213 exceeds or is equal to the threshold value, the terminal device 20 may determine that the middle frame 22 is pressed, and then generate a corresponding pressing instruction. The so-called reflected wave 202 intensity exceeding the threshold value may be less than the threshold value or greater than the threshold value, which depends on the density of the medium inside the reflection pad 214, that is, before and after the reflection pad 214 is squeezed and deformed, whether the density difference between the reflection pad 214 and the medium inside the reflection pad 214 increases or decreases. If the density difference between the reflection pad 214 and the medium inside the reflection pad 214 increases in the deformed state, according to the principle of reflected waves, the reflection pad 214 is pressed. The intensity of the reflected wave 202 increases when the reflection pad 214 is pressed. The threshold at this time can be preset to be greater than the intensity of the reflected wave 202 in the unpressed state. When it is detected that the intensity of the reflected wave 202 is greater than or equal to the threshold, the terminal device 20 determines that it is pressed; on the other hand, if the density difference between the reflection pad 214 and the medium inside the reflection pad 214 decreases in the deformed state, according to the principle of reflected waves, the intensity of the reflected wave 202 decreases when the reflection pad 214 is pressed. The threshold at this time can be preset to be less than the intensity of the reflected wave 202 in the unpressed state. When it is detected that the intensity of the reflected wave 202 is less than or equal to the threshold, the terminal device 20 determines that it is pressed.

[0061] The embodiment of the present disclosure utilizes the reflection principle of ultrasound, that is, during the propagation process, the amount of ultrasound reflected is positively correlated with the density difference between the media. More importantly, the embodiment of the present disclosure sets both the transmitting element 212 and the receiving element 213 toward the inside, and deforms the internal reflection pad 214 by pressing and pushing, thereby changing the density difference between the medium inside the reflection pad 214 and changing the intensity of the reflected wave 202. Therefore, the material and thickness of the middle frame 22 have no effect on the induction of ultrasound. Compared with the related art, the middle frame 22 must be set to metal and the thickness needs to be less than 1.6mm, which increases the optional space of the middle frame 22, and the properties of the middle frame 22 can be set according to the actual structure, shape requirements, etc. In some embodiments, the middle frame 22 may include at least one of the following materials: plastic, plastic, metal, malondialdehyde (MDA). In other embodiments, the thickness of the middle frame 22 may be greater than or equal to 1.6mm. Through the configuration disclosed herein, the material of the middle frame 22 can be diversified, and in particular, the non-metal middle frame 22 can meet the requirements of miniaturization and lightness of the terminal device 20, and in some cases can reduce the shielding and interference of the middle frame 22 on the signal, so as to meet the design requirements of some antennas. At the same time, the thickness of the middle frame 22 is greater than or equal to 1.6 mm, and can be set to a thickness of 2 mm, so as to improve the strength of the middle frame 22, and the non-metal middle frame 22 can also meet the support and protection functions.

[0062] In some embodiments, the pressure sensing component 21 may further include: a fixing clip (not shown), one end of which is fixedly connected to the middle frame 22, and the other end is arranged on the second surface of the reflective pad 214. The second surface is opposite to the first surface, that is, the surface that does not contact the emitting element 212 or the receiving element 213. The fixing clip may have a certain elasticity, which is used to clamp the reflective pad 214, and enable the reflective pad 214 to be close to one side of the middle frame 22, and close to the emitting element 212 and the receiving element 213. One or more fixing clips may be provided, for example, the fixing clips are arranged at both ends of the reflective pad 214, and the middle area of ​​the reflective pad 214 corresponds to the emitting element 212 and the receiving element 213, and the fixing clips are arranged at the two end positions to avoid the central area of ​​the second surface of the reflective pad 214. It can also be ensured that there are no other elements and it is only in contact with the air, so that the reflective pad 214 and the air form two media that reflect the ultrasonic wave.

[0063] Based on the same concept, Fig.10As shown, the present disclosure also provides a pressure control method 30. The pressure control method 30 of the present disclosure can be applied to the terminal device 20 of any of the aforementioned embodiments. The pressure control method 30 may include step S31, transmitting ultrasonic waves through a transmitting element, and receiving reflected waves through a receiving element; step S32, if the intensity of the reflected wave exceeds a threshold, a corresponding pressing instruction is generated. The pressing instruction may be a manipulation instruction corresponding to the current terminal device scene; or it may be a control instruction of the terminal device system, such as adjusting the volume, etc. Among them, exceeding the threshold may mean being greater than the threshold, or it may mean being less than the threshold, which depends on the relative size of the density of the reflection pad 214 and the density of the medium inside the reflection pad 214, that is, before and after the reflection pad 214 is squeezed and deformed, whether the density difference between the reflection pad 214 and the medium inside the reflection pad 214 increases or decreases. If the density difference between the reflection pad 214 and the medium inside the reflection pad 214 increases in the deformed state, according to the principle of the reflected wave, the intensity of the reflected wave 202 increases when the reflection pad 214 is pressed, and the threshold at this time can be preset to be large. On the other hand, if the density difference between the reflective pad 214 and the medium inside the reflective pad 214 decreases in the deformed state, according to the principle of reflected waves, the intensity of the reflected wave 202 decreases when the reflective pad 214 is pressed. The threshold at this time can be preset to be less than the intensity of the reflected wave 202 when not pressed. When the intensity of the reflected wave 202 is detected to be less than or equal to the threshold, the terminal device 20 determines that it is pressed. Through the pressure sensing control method 30, it is possible to conveniently perform control, realize multiple control modes, and the control is accurate and reliable, reducing the risk of false touch.

[0064] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0065] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0066] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0067] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0068] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0069] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0070] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A pressure sensing component, characterized in that: include: A transmitting element, wherein the transmitting element is used to transmit ultrasonic waves; A receiving element, the receiving element is arranged adjacent to the transmitting element and is used to receive the reflected wave of the ultrasonic wave; A reflection pad, the reflection pad comprising a first surface and a second surface opposite to each other, the reflection pad being arranged on one side of the emitting element and the receiving element, and the first surface of the reflection pad being in contact with the emitting element and the receiving element; A fixing clip, one end of which is used to be fixedly connected to the middle frame of the terminal device, and the other end of which is arranged on the second surface of the reflective pad. The fixing clip is elastic and is used to clamp the reflective pad to the middle frame so that the reflective pad is close to one side of the middle frame and close to the transmitting element and the receiving element. When the other side of the transmitting element and / or the receiving element is pressed, the reflective pad is deformed in the area corresponding to the pressing, and the medium density in the deformed area increases.

2. The pressure sensing component according to claim 1, characterized in that: The dielectric density m of the reflective pad satisfies 1kg / m 3 ≤m≤1.5kg / m 3 .

3. The pressure sensing component according to claim 2, characterized in that: The material of the reflective pad is rubber.

4. The pressure sensing component according to any one of claims 1 to 3, characterized in that: The pressure sensing component also includes: A support plate is arranged on the second surface of the reflection pad, at least covering the area corresponding to the emitting element and the receiving element, and the support plate and the reflection pad have different medium densities, wherein the second surface is opposite to the first surface.

5. The pressure sensing component according to claim 4, characterized in that: The support plate is rigid, and the medium density of the support plate is greater than or equal to 1000 kg / m 3 .

6. A terminal device, characterized in that: The terminal device comprises: a pressure sensing component as described in any one of claims 1-5.

7. The terminal device according to claim 6, characterized in that: The terminal device further includes: a middle frame; The back side of the emitting element is arranged on the inner side of the middle frame; The back side of the receiving element is arranged on the inner side of the middle frame; A reflection pad, the reflection pad is arranged inside the emitting element and the receiving element, and a first surface of the reflection pad abuts against the emitting element and the receiving element; When the outer side surface of the middle frame is pressed, the reflective pad is deformed in the area corresponding to the pressing, and the medium density in the deformed area increases.

8. The terminal device according to claim 7, characterized in that: The middle frame includes at least one of the following materials: plastic, plastic, metal, and malondialdehyde.

9. The terminal device according to claim 7, characterized in that: The thickness of the middle frame is greater than or equal to 1.6 mm.

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