CN114993526A - Pressure sensor and electronic equipment capable of achieving multi-directional sensing - Google Patents
Pressure sensor and electronic equipment capable of achieving multi-directional sensing Download PDFInfo
- Publication number
- CN114993526A CN114993526A CN202210491949.0A CN202210491949A CN114993526A CN 114993526 A CN114993526 A CN 114993526A CN 202210491949 A CN202210491949 A CN 202210491949A CN 114993526 A CN114993526 A CN 114993526A
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- Prior art keywords
- pressure sensor
- circuit board
- electronic device
- pressure
- sensing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920000742 Cotton Polymers 0.000 claims abstract description 5
- 238000005253 cladding Methods 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims description 19
- 239000004744 fabric Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 11
- 238000005187 foaming Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000012767 functional filler Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
Abstract
The application discloses can realize pressure sensor and electronic equipment of diversified response, pressure sensor's structure includes that circuit board and cladding are cotton at the electrically conductive bubble in the circuit board outside, the circuit board adopts spatial structure's flexible line way board. The sensor is for an electronic device to which a user may provide input signals by applying a force, such as a pinch or squeeze, to a surface of the electronic device. The pressure sensor can receive pressure signals from any direction, realize multi-direction sensing and improve the experience of users.
Description
Technical Field
The invention belongs to the technical field of pressure detection, and particularly relates to a pressure sensor capable of realizing multi-directional sensing and electronic equipment.
Background
In TWS headsets, common pressure sensing technologies include strain gauge technology, MEMS (micro electro mechanical system) pressure sensor technology, pressure capacitance technology, and the like. The strain gage technology is a sensing element made according to a strain effect, the strain gage is adhered to an elastic body through an adhesive, when the strain is measured, a glue layer formed by the adhesive plays a very important role, the strain gage needs to accurately transmit the strain of the elastic body to a sensitive grid, the structure of the strain gage needs a large space, and the sensitivity is usually low. The MEMS pressure technology is an industrial technology which fuses a microelectronic circuit technology and a micro-mechanical system together, the operation range of the MEMS pressure technology is within a micrometer scale, the MEMS pressure technology generally needs to support the back of an MEMS device by means of external objects, the purpose is that when the device deforms, the strain of a sensor inside the device is different, so that a pressure signal is obtained, but the back of the MEMS sensor and a support part are discrete parts, the assembly consistency is difficult to meet, the MEMS structure is fragile, and the drop resistance coefficient is low; the pressure capacitance technology is a pressure sensor which utilizes a capacitance sensitive element to convert the measured pressure into electric quantity which has a certain relation with the measured pressure and outputs the electric quantity, and the pressure sensor needs to detect the capacitance between surfaces, has complex assembly and high requirements on assembly precision and structural space.
Patent CN212137906U discloses a wireless headphone structure at back is located to pressure button, and it includes ear pole, pressure button, bluetooth antenna, obturator and circuit board, the circuit board is located in the ear pole, press the button to locate on the ear pole, press and establish through the obturator with the pressure button contact is in order to accomplish the transmission of button pressure. Above-mentioned structure on the one hand needs to set up and presses and builds, and space demand is great, and on the other hand the transmission of face pressure can only go on in the unidirectional, uses inconveniently.
In view of the above, there is a need in the art for a pressure sensor capable of performing multi-orientation sensing.
Disclosure of Invention
The invention provides a 360-degree sensible sensor and an electronic device comprising the sensor, and a user can apply force such as pinching or squeezing in any direction to the surface of the electronic device to provide an input signal to the device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sensor, comprising: the circuit board and cladding are in the electrically conductive bubble cotton on the circuit board, the cotton 360 cladding of electrically conductive bubble is on the circuit board.
Further, the circuit board is a flexible circuit board, which may be a cylindrical or spherical circuit board, or a flexible circuit board in a three-dimensional shape such as a polygonal column, a polyhedral ball circuit board, etc. formed by connecting a plurality of planes; the flexible circuit board in the three-dimensional shape can receive pressure signals in all directions and is not limited to force in a certain direction; the flexible circuit board is made of a conductive material, such as copper, silver, gold, or other metal traces.
Further, the conductive foam comprises a TPU foaming material and conductive fiber cloth attached to the surface of the TPU foaming material; functional fillers are added into the TPU foaming material, and are selected from silver, carbon black, graphite and the like; the conductive foam can cause material deformation along with external force loading, so that the resistance of the conductive foam changes.
Furthermore, the conductive fiber cloth is obtained by depositing a metal copper layer and a metal nickel layer on the breathable grid cloth.
As a preferred embodiment, a supporting component can be further added to the sensor of the present invention to improve the rebound life of the conductive foam. The support members may be radially disposed ribs. Preferably, the support member may be an elastomer, such as a spring, a superelastic material, or the like.
The invention also provides electronic equipment comprising the pressure sensor.
Further, the electronic device includes a housing having a deformable surface, which may be a portion of the housing of the electronic device or may be internal to the electronic device, the deformable surface being an incompressible superelastic material; the sensor is placed against a deformable surface of the electronic device, and a user may provide input signals to the device by applying a force, such as pinching or squeezing, to the surface.
The invention also provides an earphone comprising the pressure sensor.
Further, the earphone structure includes:
a housing;
a speaker disposed inside the housing;
a rod extending from the speaker toward the housing;
a pressure sensor disposed within the rod and a controller coupled to the pressure sensor;
the stem having a deformable surface, the pressure sensor being disposed against the deformable surface; the deformable surface is made of an incompressible superelastic material; the deformable surface transmits the external force to the pressure sensor and outputs a pressure signal; the controller determines the amount of force from the signal provided by the pressure sensor.
Compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, the invention can realize real omnibearing pinching and pressing control, adopts the flexible circuit board which is in a three-dimensional shape, can receive pressure signals in an omnibearing way, does not limit the force which only acts in a specific direction, improves the sensitivity of pressure, and has quite different feelings on the use experience of a user.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a cross-section of a pressure sensor made without a support member according to the present invention;
FIG. 2 is a cross-section of a pressure sensor made in accordance with the present invention incorporating a support member;
FIG. 3 is a perspective view of a pressure sensor of the cylindrical circuit board of the present invention;
FIG. 4 is a perspective view of a pressure sensor of the spherical circuit board of the present invention;
fig. 5 is a schematic view of the earphone of the present invention.
Description of reference numerals:
1-a deformable surface; 2-conductive foam; 3-a circuit board; 4-a support member; and 5, a controller.
Detailed Description
The technical solutions of the present invention will be described in detail with reference to the accompanying drawings, and it is obvious that the described embodiments are not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work belong to the protection scope of the present invention.
It should be noted that the raw materials used in the present invention are all common commercial products, and the sources thereof are not particularly limited.
Example 1
As shown in fig. 1 and 4, the pressure sensor of the present embodiment includes a spherical circuit board 3, and a conductive foam 2 coated on the spherical circuit board by 360 °, and a deformable surface 1 of the electronic device is outside the pressure sensor. The deformable surface 1 is tightly attached to the conductive foam 1, when an external force touches and presses the outside of the deformable surface, the deformable surface is stressed to deform, the conductive foam arranged on the inner side of the deformable surface is synchronously stressed to deform and transmit pressure to the circuit board, and the circuit board receives deformation signals and responds to output processing signals to control the operation of the electronic equipment.
The spherical circuit board 3 is arranged in a three-dimensional shape and can receive the force transmitted by the conductive foam from all directions, and a user of the electronic equipment can apply signals from any direction, so that the use is more convenient. The spherical circuit board can also be arranged in other three-dimensional shapes, such as a cylindrical shape or a polygonal column formed by connecting a plurality of planes, a polyhedral sphere and the like. One skilled in the art can select as desired. The pressure sensor of the cylindrical circuit board is shown in fig. 3.
The conductive foam is composed of a TPU foaming material and conductive fiber cloth attached to the surface of the TPU foaming material; functional fillers are added into the TPU foaming material, and are selected from silver, carbon black, graphite and the like; the conductive fiber cloth is obtained by depositing a metal copper layer and a metal nickel layer on breathable gridding cloth; the conductive foam can cause material deformation along with external force loading, so that the resistance of the conductive foam changes.
The pressure sensor can be used for electronic equipment such as earphones, game machine handles and the like.
Taking an earphone as an example, as shown in fig. 5, the pressure sensor is located in a rod extending from a speaker housing of the earphone, a controller coupled to the pressure sensor is further located in the rod, the rod has a deformable surface 1, when an external force touches and presses the outside of the deformable surface 1, the deformable surface deforms under stress, a conductive foam arranged on the inner side of the deformable surface deforms under stress synchronously and transmits pressure to a circuit board, the circuit board receives a deformation signal and outputs the pressure signal to the controller 5 in response, and the controller can control whether to output the signal according to the detected pressure value. For example, the controller may not output a signal according to the detected pressure value being less than the first threshold value; outputting a first signal when the detected pressure value is larger than a first threshold value and smaller than a second threshold value; and outputting a second signal according to the condition that the detected pressure value is greater than a second threshold value, wherein the first threshold value is smaller than the second threshold value.
Further, the controller may be configured to output different signals according to the number and duration of times the external force is pressed on the pressure sensor. For example, the controller may output the first signal according to a condition that the detected pressure value is greater than the first threshold and less than the second threshold, and the duration time does not exceed the set value; a third signal can be output according to the condition that the detected pressure value is greater than the first threshold value and less than the second threshold value and the duration time exceeds a set value; the fourth signal may be output according to a condition that the pressure value detected twice within the set time is greater than the first threshold and less than the second threshold, and the duration time does not exceed the set value each time.
The above is an example of the control situation, and those skilled in the art can freely select the control situation according to the specific function of the electronic device.
Example 2
As shown in fig. 2, the pressure sensor of this embodiment is further provided with a support member 4, compared with embodiment 1, for improving the rebound life of the conductive foam, the support member is a rib placed radially, and the material of the support member may be an elastomer, such as a spring, a super-elastomer material, etc.; the superelastic material may be a superelastic silicone or rubber.
The embodiments of the present invention have been described in detail, but the embodiments are only examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions for the present invention are within the scope of the present invention for those skilled in the art. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (9)
1. A pressure sensor capable of realizing multi-directional sensing is characterized by comprising: the circuit board and the cladding are in the electrically conductive bubble cotton on the circuit board, the cotton 360 cladding of electrically conductive bubble is on the circuit board.
2. The pressure sensor of claim 1, wherein the circuit board is a flexible circuit board, and the circuit board is a cylindrical or spherical circuit board, or a polygonal prism or polygonal sphere circuit board formed by connecting a plurality of planes.
3. The pressure sensor capable of sensing in multiple directions as claimed in claim 1, wherein the conductive foam comprises TPU foam and conductive fiber cloth attached to the surface of the TPU foam.
4. The pressure sensor capable of achieving multi-directional sensing according to claim 1, wherein a support member is disposed inside the conductive foam in a radial direction for prolonging the rebound life of the conductive foam.
5. An electronic device, comprising the pressure sensor capable of performing multi-orientation sensing as claimed in any one of claims 1 to 4.
6. An electronic device according to claim 5, characterized in that the electronic device comprises a surface with a deformable shape, which deformable surface is a part of the housing of the electronic device, or inside the electronic device, against which deformable surface the sensor is arranged, and that the user can provide input signals to the device by applying a force, such as a pinch or squeeze, to the surface.
7. An earphone, comprising:
a housing;
a speaker disposed within the housing;
a rod extending from the speaker toward the housing;
the pressure sensor is arranged in the rod, and the pressure sensor is the pressure sensor capable of realizing multi-direction sensing in any one of claims 1-4.
8. The headset of claim 7, wherein the stem has a deformable surface, the pressure sensor being disposed against the deformable surface, the deformable surface transmitting external forces to the pressure sensor and outputting a pressure signal.
9. The headset of claim 8, wherein a controller is further disposed within the stem and coupled to the pressure sensor, the controller determining the amount of force from a signal provided by the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210491949.0A CN114993526A (en) | 2022-05-05 | 2022-05-05 | Pressure sensor and electronic equipment capable of achieving multi-directional sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210491949.0A CN114993526A (en) | 2022-05-05 | 2022-05-05 | Pressure sensor and electronic equipment capable of achieving multi-directional sensing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114993526A true CN114993526A (en) | 2022-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210491949.0A Pending CN114993526A (en) | 2022-05-05 | 2022-05-05 | Pressure sensor and electronic equipment capable of achieving multi-directional sensing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114993526A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2640204Y (en) * | 2003-09-08 | 2004-09-08 | 孙爱祥 | Omnibearing conductive foamed cotton |
| CN105841851A (en) * | 2015-01-13 | 2016-08-10 | 香港纺织及成衣研发中心有限公司 | Flexible pressure sensor, manufacturing method therefor, and flexible pressure sensor array |
| TWM562211U (en) * | 2017-07-10 | 2018-06-21 | 創譯科技材料有限公司 | High elastic foam structure |
| CN108332889A (en) * | 2017-01-20 | 2018-07-27 | 中国科学院物理研究所 | A kind of aeroge pressure sensor |
| CN110869239A (en) * | 2017-07-07 | 2020-03-06 | 麦格纳座椅公司 | Pressure sensing system and seat cushion having the same |
| US20200092629A1 (en) * | 2018-09-14 | 2020-03-19 | Apple Inc. | Elastomeric Pressure Transduction Based User Interface |
| CN212936164U (en) * | 2020-09-27 | 2021-04-09 | 北京钛方科技有限责任公司 | Press detection device and earphone |
| CN113150371A (en) * | 2021-04-09 | 2021-07-23 | 华东师范大学 | PDMS sponge-based strain sensor and preparation method thereof |
| CN213990993U (en) * | 2021-01-28 | 2021-08-17 | 东莞微感电子技术有限公司 | Touch structure and earphone |
| CN214851755U (en) * | 2021-05-10 | 2021-11-23 | 深圳瑞湖科技有限公司 | Pressure earphone |
-
2022
- 2022-05-05 CN CN202210491949.0A patent/CN114993526A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2640204Y (en) * | 2003-09-08 | 2004-09-08 | 孙爱祥 | Omnibearing conductive foamed cotton |
| CN105841851A (en) * | 2015-01-13 | 2016-08-10 | 香港纺织及成衣研发中心有限公司 | Flexible pressure sensor, manufacturing method therefor, and flexible pressure sensor array |
| CN108332889A (en) * | 2017-01-20 | 2018-07-27 | 中国科学院物理研究所 | A kind of aeroge pressure sensor |
| CN108332888A (en) * | 2017-01-20 | 2018-07-27 | 中国科学院物理研究所 | A kind of full carbon aerogels pressure sensor |
| CN110869239A (en) * | 2017-07-07 | 2020-03-06 | 麦格纳座椅公司 | Pressure sensing system and seat cushion having the same |
| TWM562211U (en) * | 2017-07-10 | 2018-06-21 | 創譯科技材料有限公司 | High elastic foam structure |
| US20200092629A1 (en) * | 2018-09-14 | 2020-03-19 | Apple Inc. | Elastomeric Pressure Transduction Based User Interface |
| CN212936164U (en) * | 2020-09-27 | 2021-04-09 | 北京钛方科技有限责任公司 | Press detection device and earphone |
| CN213990993U (en) * | 2021-01-28 | 2021-08-17 | 东莞微感电子技术有限公司 | Touch structure and earphone |
| CN113150371A (en) * | 2021-04-09 | 2021-07-23 | 华东师范大学 | PDMS sponge-based strain sensor and preparation method thereof |
| CN214851755U (en) * | 2021-05-10 | 2021-11-23 | 深圳瑞湖科技有限公司 | Pressure earphone |
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