Pressure sensing switches and electronic devices

Abstract

The present invention discloses a pressure-sensing switch and electronic device. The pressure-sensing switch includes a pressure sensor and a main chip. The pressure sensor is configured to output a detection voltage corresponding to a detection pressure value. The main chip is configured to obtain the detection voltage output by the pressure sensor. When the detection voltage value obtained within a preset time period does not change, the detection voltage value is used as the ambient pressure value of the pressure sensor. When the difference between the detection voltage value and the ambient pressure value is greater than or equal to a turn-on threshold voltage, a first level signal is output indicating that the switch is turned on. When the difference between the detection voltage value and the ambient pressure value is less than a release threshold voltage, a second level signal is output indicating that the switch is turned off. The main chip is also configured to re-acquire the current ambient pressure value of the pressure sensor at preset time intervals and update the re-acquired current ambient pressure value with the ambient pressure value. The pressure-sensing switch of the present invention is designed to improve adaptability during assembly.

Description

Technical Field

[0001] The present invention relates to the field of pressure sensors, and in particular to a pressure sensing switch and electronic equipment. Background Art

[0002] In recent decades, the widespread use of industrial and consumer microelectronic devices has led to increasing demands for convenient control of devices like wireless headphones and music playback systems. However, currently, when using wireless headphones, if you need to temporarily stop playback or perform other operations, you must remove the main player from your pocket and find the corresponding buttons to complete the operation. This is complex and inconvenient, especially in crowded public places like subways and buses.

[0003] However, using existing pushbutton switches and membrane switches places particularly high demands on the assembly structure and the complex external stress environment. For example, if the combined pressure during assembly reaches a certain level, the switch will be forced closed and no longer able to freely spring back, making subsequent processing of the product quite complicated.

[0004] Therefore, the existing buttons need to be improved to meet people's needs for convenient control and simple assembly. Summary of the Invention

[0005] The main purpose of the present invention is to provide a pressure-sensitive switch, aiming to improve its adaptability.

[0006] To achieve the above objectives, the present invention provides a pressure sensing switch, comprising:

[0007] A pressure sensor is used to output a detection voltage value corresponding to the detection pressure value;

[0008] The main chip is configured to obtain a detection voltage value output by the pressure sensor, and when the detection voltage value obtained within the preset time period does not change, use the detection voltage value as the ambient pressure value of the pressure sensor; when the difference between the detection voltage value and the ambient pressure value is greater than or equal to a turn-on threshold voltage, output a first level signal indicating that the switch is on; and when the difference between the detection voltage value and the ambient pressure value is less than a release threshold voltage, output a second level signal indicating that the switch is off;

[0009] The main chip is further configured to reacquire the current ambient pressure value of the pressure sensor at a preset time interval, and update the ambient pressure value with the reacquired current ambient pressure value.

[0010] In one embodiment, the pressure sensing switch includes:

[0011] A pressure sensor body, comprising the pressure sensor and the main chip;

[0012] A frame body, provided on the pressure sensor body;

[0013] a cover plate, disposed on a side of the frame away from the pressure sensor body; and

[0014] The soft protective piece is arranged in the accommodating space enclosed by the cover plate, the frame body and the pressure sensor body.

[0015] In one embodiment, the pressure sensor body further includes:

[0016] an electric control board, wherein the pressure sensor is provided on the main chip, the main chip is electrically connected to an output end of the pressure sensor, a surface of the main chip away from the pressure sensor is provided on the electric control board, and the pressure sensor and the main chip are electrically connected to the electric control board respectively;

[0017] The main chip is further configured to output a level signal representing a corresponding function according to the duration of the pressure detection signal.

[0018] In one embodiment, the pressure sensor and the main chip are electrically connected to the electronic control board via binding wires.

[0019] In one embodiment, the pressure sensor and the main chip are integrated and packaged in one chip.

[0020] In one embodiment, the electronic control board has five pads on a side away from the main chip;

[0021] The five pads are respectively a power input pin, a ground pin, a switch control output pin, a data communication pin and a burning pin.

[0022] In one embodiment, the pressure sensor is a silicon piezoresistive pressure sensor or a silicon capacitive pressure sensor.

[0023] In one embodiment, the soft protective component is a solidified fluid soft glue.

[0024] The present invention also provides an electronic device comprising the pressure sensing switch described above.

[0025] In one embodiment, the electronic device is an audio playback device.

[0026] In the technical solution of the present invention, the pressure-sensing switch includes a pressure sensor and a main chip. The pressure sensor is used to output a detection voltage value corresponding to the detection pressure value; the main chip is used to obtain the detection voltage value output by the pressure sensor. When the detection voltage value obtained within a preset time period does not change, the detection voltage value is used as the ambient pressure value of the pressure sensor; when the difference between the detection voltage value and the ambient pressure value is greater than or equal to the turn-on threshold voltage, a first level signal indicating that the switch is turned on is output; when the difference between the detection voltage value and the ambient pressure value is less than the release threshold voltage, a second level signal indicating that the switch is turned off is output; the main chip is also used to re-acquire the current ambient pressure value of the pressure sensor at preset time intervals and update the ambient pressure value with the re-acquired current ambient pressure value. The pressure-sensing switch of the present invention is designed to improve adaptability during the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] Figure 1 This is a schematic structural diagram of an embodiment of a pressure sensing switch of the present invention;

[0029] Figure 2 is a schematic structural diagram of another embodiment of a pressure sensing switch of the present invention;

[0030] Figure 3 A schematic diagram of an embodiment of the assembly process of a pressure sensing switch of the present invention;

[0031] Figure 4 A schematic diagram of another embodiment of the assembly process of a pressure sensing switch of the present invention;

[0032] Figure 5 FIG. 2 is a schematic diagram of another embodiment of the assembly process of a pressure sensing switch according to the present invention.

[0033] Description of Figure Numbers:

[0034] Label name Label name 10 pressure sensor 50 Software protection 20 Main chip 60 cover 30 Electric control panel 70 Deformable panel material 31 pads 80 Corpus cavernosum 40 Frame

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The present invention provides a pressure sensing switch. Figures 1 to 5 , the pressure sensing switch includes:

[0041] The pressure sensor 10 is used to output a detection voltage value corresponding to the detection pressure value;

[0042] The main chip 20 is configured to obtain a detection voltage value output by the pressure sensor 10. When the detection voltage value obtained within the preset time period does not change, the detection voltage value is used as the ambient pressure value of the pressure sensor 10. When the difference between the detection voltage value and the ambient pressure value is greater than or equal to the turn-on threshold voltage, the main chip 20 outputs a first level signal indicating that the switch is on. When the difference between the detection voltage value and the ambient pressure value is less than the turn-off threshold voltage, the main chip 20 outputs a second level signal indicating that the switch is off.

[0043] The main chip 20 is further configured to reacquire the current ambient pressure value of the pressure sensor 10 at a preset time interval, and update the ambient pressure value with the reacquired current ambient pressure value.

[0044] It should be noted that the main chip 20 can be implemented using a microprocessor such as a single chip microcomputer, a DSP, an FPGA or a CPU. In some other embodiments, it can also be implemented using a programmable logic controller PLC or a CPLD, which is not limited here. The preset time is set according to user needs.

[0045] The pressure sensing switch of the present invention is used for assembly process detection before shipment. During assembly, an assembly object will be placed on the pressure sensing switch. At this time, the main chip 20 will detect the detection voltage value V. When the detection voltage value obtained within the preset time period Tx does not change, the detection voltage value is used as the ambient pressure value V0 of the pressure sensor 10; that is, when there is no external pressure, the detection voltage value V is equal to the ambient pressure value V0. At this time, it is equivalent to calibrating the ambient pressure value V0 that the pressure sensing switch is subjected to before shipment. Subsequently, when people apply pressure, the main control chip will re-detect the voltage value V. When the difference between the detection voltage value V and the ambient pressure value V0 is greater than or equal to the switch, the switch will be turned on. When the threshold voltage Va is reached, a first level signal indicating that the switch is on is output. At this time, the electronic device connected to the pressure-sensing switch will perform a corresponding on-state operation after receiving the corresponding first level signal. For example, if the electronic device is a music player, music will be played. In addition, when people raise their hands, the main chip 20 will re-detect the voltage value V. When the difference between the detected voltage value V and the ambient pressure value V0 is less than the release threshold voltage Vb, a second level signal indicating that the switch is off is output. After receiving the corresponding second level signal, the electronic device connected to the pressure-sensing switch will perform a corresponding off-state operation. For example, if the electronic device is a music player, music will be stopped. Of course, in other embodiments, the electronic device can also be other, which is not specifically limited here. It should be noted that the on-state threshold voltage Va and the release threshold voltage Vb are fixed values, set according to user needs, and are not specifically limited here. Among them, the time interval T can be 8 seconds or other, which can be set specifically according to user needs. Since the ambient pressure value V0 is constantly changing, in order to prevent the external pressure from being too large and causing the pressure sensing switch to be unable to rebound, the main chip 20 can also be used to re-obtain the current detection voltage value V0 of the pressure sensor 10 according to the preset time interval T, and update the ambient pressure value V0 with the re-obtained current detection voltage value V, so that it is more adaptable.

[0046] In one embodiment, referring to Figures 1 to 5 , the pressure sensing switch includes:

[0047] A pressure sensor body, comprising the pressure sensor 10 and the main chip 20;

[0048] A frame 40 is provided on the pressure sensor body;

[0049] a cover plate 60 , disposed on a side of the frame 40 away from the pressure sensor body; and

[0050] The soft protective member 50 is disposed in a receiving space enclosed by the cover plate 60 , the frame 40 and the pressure sensor body.

[0051] The frame 40 is used to protect the pressure sensor body. The material of the frame 40 can be an insulating material, such as polyimide and epoxy glue. In some other embodiments, the frame 40 can also be made of other insulating materials that meet the insulation layer requirements of better pressure resistance, insulation, waterproofness, moisture resistance and buffering. There is no specific limitation here and it is set according to user needs.

[0052] The cover 60 is the same as the frame 40 and is used to protect the pressure sensor body. On the one hand, it prevents the pressure sensor body from being damaged or deformed due to excessive external pressure and unable to work normally. On the other hand, it brings a good experience to the user and prolongs the service life. In addition, according to the pressure resistance and sensitivity that the user wants to withstand, the cover 60 can also be set to different protection levels. For example, low, medium, and high protection levels with different pressure resistance and sensitivity can be set. For example, the thickness of the cover 60 with a low protection level is 0.3mm, the thickness of the cover 60 with a medium protection level is 0.6mm, and the thickness of the cover 60 with a high protection level is 1mm; among them, the thickness of the cover 60 of a specific protection level can be set according to user needs, and no specific limitation is made here.

[0053] The soft protective member 50 fills the space enclosed by the cover plate 60, the frame 40, and the pressure sensor body. The soft protective member 50 is used to protect the pressure sensor 10 and the binding wires, thereby preventing water and contaminants from damaging the pressure sensor 10. Furthermore, the cover plate 60 is a protective cover. Since the soft protective member 50 is generally made of an elastic and soft material, when pressure is applied to the cover plate 60, the soft protective member 50 deforms to transmit the pressure to the pressure sensor 10. This allows external pressure to be transmitted through the pressure sensor 10 without direct contact, making operation convenient. Furthermore, even when subjected to high pressure, the soft protective member 50 acts as a buffer to protect the pressure sensor body. The soft protective member 50 can be a solidified fluid soft gel, which has reliable elasticity and can be easily filled into the frame 40. Furthermore, the soft protective member 50 filling the frame 40 can form a sealed structure to reduce external signal interference. Alternatively, other elastic soft gels can be used, depending on user needs and are not specifically limited herein.

[0054] In order to better protect the pressure sensing switch, some assembly objects will be placed on the pressure sensing switch during the assembly process before leaving the factory. The assembly objects can be sponge 80, deformable panel 70 or other. Figures 1 to 5 In one embodiment, the assembly comprises:

[0055] The sponge 80 is provided on a side of the cover plate 60 away from the soft protective member 50;

[0056] The deformable panel 70 is disposed on a side of the sponge 80 away from the cover plate 60 .

[0057] During operation, the deformable panel 70 is pressed, and the deformable panel 70 transmits the force to the sponge 80 , and then transmits the force to the cover 60 , the flexible protective member and the pressure sensor 10 in sequence through the sponge 80 .

[0058] In this embodiment, the first level of protection is formed by the deformable panel 70, and the second level of protection is formed by the sponge 80, that is, the two-level buffer protection can effectively avoid the gradual reduction of detection reliability during use, and achieve better protection for the pressure sensing switch.

[0059] In one embodiment, referring to Figures 1 to 5 , the pressure sensor body further includes:

[0060] The electronic control board 30, the pressure sensor 10 is arranged on the main chip 20, the main chip 20 is electrically connected to the output end of the pressure sensor 10, and the side surface of the main chip 20 away from the pressure sensor 10 is arranged on the electronic control board 30, and the pressure sensor 10 and the main chip 20 are electrically connected to the electronic control board 30 respectively; it should be noted that the electronic control board 30 can be implemented by a PCB double-sided board. Of course, in some other embodiments, the electronic control board 30 can also adopt a multi-panel board. This is not specifically limited here and is set according to user needs.

[0061] The main chip 20 is further configured to output a level signal representing a corresponding function according to the duration of the pressure detection signal.

[0062] The main chip 20 can perform different controls according to the corresponding application scenarios. For example, according to the different sizes of the pressure detection values ​​detected by long press, short press, or a combination of long and short press, it can be divided into a first key detection signal, a second key detection signal and a third key detection signal, and these key detection signals are output to the corresponding electronic device for function control, where the electronic device can be an audio playback device or other, which is not specifically limited here.

[0063] In addition, the main chip 20 is also used to output corresponding level signals according to the pressure detection signal, the preset ambient voltage value, the opening threshold voltage and the release threshold voltage to indicate whether the switch is on or off;

[0064] It is also used to obtain the environmental pressure detection signal of the pressure sensor 10 according to a preset time interval, and update the preset environmental pressure value with the obtained pre-environmental voltage value.

[0065] Specifically, the pressure sensor 10 is used to output a detection voltage value corresponding to the detection pressure value;

[0066] The main chip 20 is configured to obtain a detection voltage value output by the pressure sensor 10. When the detection voltage value obtained within the preset time period does not change, the detection voltage value is used as the ambient pressure value of the pressure sensor 10. When the difference between the detection voltage value and the ambient pressure value is greater than or equal to the turn-on threshold voltage, the main chip 20 outputs a first level signal indicating that the switch is on. When the difference between the detection voltage value and the ambient pressure value is less than the turn-off threshold voltage, the main chip 20 outputs a second level signal indicating that the switch is off.

[0067] The main chip 20 is further configured to reacquire the current ambient pressure value of the pressure sensor 10 at a preset time interval, and update the ambient pressure value with the reacquired current ambient pressure value.

[0068] In one embodiment, referring to Figures 1 to 5 The pressure sensor 10 and the main chip 20 are electrically connected to the electronic control board 30 through binding wires. The binding wires facilitate welding operations and are relatively stable after welding.

[0069] In one embodiment, referring to Figures 1 to 5 The pressure sensor 10 and the main chip 20 are integrated and packaged in a single chip. This integration of the pressure sensor 10 and the main chip 20 can improve the integration of the pressure sensing switch, reduce its size, and reduce signal interference in the intermediate circuit.

[0070] In one embodiment, the electronic control board 30 has five pads 31 on a side away from the main chip 20 ;

[0071] The five pads 31 are respectively a power input pin, a ground pin, a switch control output pin, a data communication pin and a programming pin. This structure facilitates the circuit board to be directly installed or connected with the corresponding circuit of the device to which it is applied.

[0072] In one embodiment, the pressure sensor 10 is a silicon piezoresistive pressure sensor 10 or a silicon capacitive pressure sensor 10. The piezoresistive pressure sensor 10 or the silicon capacitive pressure sensor 10 has high reliability in detecting pressure.

[0073] In one embodiment, the soft protective member 50 is a solidified fluid soft glue. In other embodiments, it can also be set to other types, which are not limited to the specific ones and are based on user needs.

[0074] The present invention also provides an electronic device (not shown in the figures), which includes the pressure sensing switch of the aforementioned embodiment and has all the technical effects of all the embodiments of the aforementioned pressure sensing switch.

[0075] In one embodiment, the electronic device may be an audio playback device (not shown in the figure). Of course, in some other embodiments, the electronic device may also be headphones or other devices. There is no limitation here and the specific setting is based on user needs.

[0076] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A pressure-sensitive switch used for pre-shipment assembly process testing. During assembly, an assembly object is placed on the pressure-sensitive switch, characterized in that: The pressure sensing switch comprises: A pressure sensor is used to output a detection voltage value corresponding to the detection pressure value; The main chip is configured to obtain a detection voltage value output by the pressure sensor, and when the detection voltage value obtained within a preset time period does not change, use the detection voltage value as the ambient pressure value of the pressure sensor; when the difference between the detection voltage value and the ambient pressure value is greater than or equal to a turn-on threshold voltage, output a first level signal indicating that the switch is on; and when the difference between the detection voltage value and the ambient pressure value is less than a release threshold voltage, output a second level signal indicating that the switch is off; The main chip is further configured to reacquire the current ambient pressure value of the pressure sensor at a preset time interval, and update the ambient pressure value with the reacquired current ambient pressure value; The pressure sensor body also includes: an electric control board, wherein the pressure sensor is provided on the main chip, the main chip is electrically connected to an output end of the pressure sensor, a surface of the main chip away from the pressure sensor is provided on the electric control board, and the pressure sensor and the main chip are electrically connected to the electric control board respectively; The main chip is further configured to output a level signal representing a corresponding function according to the duration of the pressure detection signal; The pressure sensor and the main chip are integrated and packaged in one chip to improve the integration of the pressure sensing switch and reduce the interference of the intermediate line signal.

2. The pressure-sensitive switch according to claim 1, wherein: The pressure sensing switch comprises: A pressure sensor body, comprising the pressure sensor and the main chip; A frame body, provided on the pressure sensor body; a cover plate, disposed on a side of the frame away from the pressure sensor body; and The soft protective piece is arranged in the accommodating space enclosed by the cover plate, the frame body and the pressure sensor body.

3. The pressure-sensitive switch according to claim 1, wherein: The pressure sensor and the main chip are electrically connected to the electric control board through binding wires.

4. The pressure-sensitive switch according to claim 1, wherein: The electronic control board has five pads on one side away from the main chip; The five pads are respectively a power input pin, a ground pin, a switch control output pin, a data communication pin and a burning pin.

5. The pressure-sensitive switch according to claim 1, wherein: The pressure sensor is a silicon piezoresistive pressure sensor or a silicon capacitive pressure sensor.

6. The pressure-sensitive switch according to claim 2, wherein: The soft protective piece is a solidified fluid soft glue.

7. An electronic device comprising the pressure sensing switch according to any one of claims 1 to 6. The electronic device according to claim 7 , wherein the electronic device is an audio playback device.

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