CN216524530U - Micro-touch force sensor - Google Patents
Micro-touch force sensor Download PDFInfo
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- CN216524530U CN216524530U CN202122904978.9U CN202122904978U CN216524530U CN 216524530 U CN216524530 U CN 216524530U CN 202122904978 U CN202122904978 U CN 202122904978U CN 216524530 U CN216524530 U CN 216524530U
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Abstract
The utility model discloses a micro-touch sensor, and particularly relates to the technical field of micro-touch sensing, which comprises an upper cover, wherein a lower cover is arranged below the upper cover, a first cavity is formed inside the upper cover and the lower cover, a detection mechanism is arranged inside the first cavity, and a heat dissipation mechanism is arranged at the bottom end of the lower cover; the detection mechanism comprises a touch steel ball, a rubber pad is fixedly arranged on the inner side of the top end of the upper cover, a stainless steel diaphragm and an oil-filled stainless steel cavity are arranged in the first cavity, and the touch steel ball is fixedly arranged at the center of the top end of the stainless steel diaphragm. The utility model effectively solves the problems of weak and unstable signals in the application of micro contact force below 1Kg through the arrangement of the detection mechanism, and the signal processing circuit board is radiated, and air enters the first cavity without moisture through the drying agent in the placing box through the radiation mechanism, so that the signal processing circuit board is prevented from being affected with damp and failing to work.
Description
Technical Field
The utility model relates to the technical field of micro-touch force sensors, in particular to a micro-touch force sensor.
Background
The touch force sensor can provide accurate and reliable touch force sensing function under the condition of small commercial grade packaging, the sensor contains a special micro-machined silicon sensing chip with mature technology, and a Wheatstone bridge with low power consumption, no amplification and no compensation is designed to output a constant signal in a 1500g measuring range.
The working principle of the sensor is as follows: the resistance value of the piezoresistor for ion implantation is changed when the piezoresistor is pressed and bent, and is in direct proportion to the applied touch force, the touch force directly acts on a silicon sensitive chip in the sensor through a stainless steel inserted bar, the resistance value of the bridge resistor is in direct proportion to the touch force, and the change of each resistor of the bridge circuit generates a corresponding output signal.
The prior art has the following defects: at present, most of touch force sensors adopt a strain gauge or a silicon chip glass micro-melting technology, can detect touch force larger than 1Kg, but have small output signal and poor repeatability for the touch force smaller than 1 Kg.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a micro-touch force sensor which adopts the technical scheme of a pressure chip, oil filling, a stainless steel diaphragm and a steel ball, and the touch force in the vertical direction of the steel ball is converted into the signal output of the pressure chip, so that the signal is large, the repeatability is good, the minimum range can be less than 5 g, and the problems that the touch force sensor in the prior art mostly adopts a strain gauge or silicon chip glass micro-melting technology, the touch force larger than 1Kg can be detected, but the output signal of the touch force smaller than 1Kg is small, and the repeatability is poor are solved.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions: the micro-touch sensor comprises an upper cover, a lower cover is arranged below the upper cover, a first cavity is formed between the upper cover and the lower cover, a detection mechanism is arranged in the first cavity, and a heat dissipation mechanism is arranged at the bottom end of the lower cover;
the detection mechanism comprises a touch force steel ball, a rubber pad is fixedly arranged on the inner side of the top end of the upper cover, a stainless steel diaphragm and an oil-filled stainless steel cavity are arranged in the first cavity, the touch force steel ball is fixedly arranged at the center of the top end of the stainless steel diaphragm, the top end of the touch force steel ball is in contact extrusion with the rubber pad, the stainless steel diaphragm is fixedly arranged on the inner side of the top end of the oil-filled stainless steel cavity, the top end of the oil-filled stainless steel cavity is fixedly connected with the inner top end of the upper cover, pressure sensing silicone oil is filled in the oil-filled stainless steel cavity, a signal processing circuit board is fixedly arranged at the bottom end of the oil-filled stainless steel cavity, the signal processing circuit board is arranged in the first cavity, a silicone oil steel ball plug is inserted at the top end of the signal processing circuit board, and the top end of the silicone oil ball plug penetrates through the bottom end of the oil-filled stainless steel cavity and is in contact with the pressure sensing silicone oil, the inside welding of signal processing circuit board has the experience pressure silicon chip, the fixed pressure probe that is equipped with in inside of signal processing circuit board, pressure probe and experience pressure silicon chip electric connection, pressure probe and the contact of silicon oil steel ball stopper, the bottom of signal processing circuit board and the inside bottom contact of lower cover.
Furthermore, the upper cover and the lower cover are connected in a welding mode.
Further, a plurality of first shrinkage pools and a plurality of second shrinkage pools have been seted up respectively to the outer end of upper cover and the bottom of lower cover.
Further, heat dissipation mechanism is including settling the box, settle the box and establish the bottom at the lower cover and establish the inboard at a plurality of second shrinkage pools, a plurality of louvres have been seted up to the inside bottom of lower cover, and is a plurality of the louvre all runs through the lower cover, the louvre is linked together with the inside of settling the box, the drier has been placed to the inside of settling the box, settle the outside of box and seted up a plurality of screw holes, and is a plurality of the screw hole communicates with the inside of settling the box.
Furthermore, a first external thread is formed in the top end of the placement box, a first internal thread is formed in the bottom end of the heat dissipation hole, and the heat dissipation hole and the placement box are connected through the first internal thread and the first external thread respectively.
Furthermore, a first filter screen is inserted into the placing box, and the drying agent is located in a second cavity formed by the bottom end of the first filter screen and the inner wall of the placing box.
Furthermore, a second internal thread is formed in the threaded hole, a pipeline is arranged in the threaded hole, a second external thread is formed in the outer end of the pipeline, the threaded hole and the pipeline are connected through the second internal thread and the second external thread respectively, one end of the pipeline extends out of the threaded hole, and a second filter screen is fixedly arranged at one end of the pipeline.
Furthermore, the inner side of the upper cover and the inner side of the lower cover are both provided with wire outlets, the two wire outlets are distributed up and down and are in contact with each other, the wire outlets are communicated with the first cavity, an electric wire is fixedly arranged in the signal processing circuit board, and the electric wire is connected with an external power supply and a display through the wire outlets.
The embodiment of the utility model has the following advantages:
1. the touch force steel ball is pressed by a finger through the rubber pad, the stainless steel diaphragm is elastically deformed by pressure through the touch force steel ball, the elastic force generated by the stainless steel diaphragm acts on pressure-sensing silicone oil in the oil-filled stainless steel cavity, the pressure-sensing silicone oil is applied to the silicone oil steel ball plug under the action of downward pressure, the silicone oil steel ball plug transmits the pressure to the pressure-sensing silicon chip through a pressure probe in the signal processing circuit board, the pressure-sensing silicon chip converts the pressure into an electric signal, and the pressure value is displayed through the display screen;
2. the outside air gets into the inside of settling the box through a plurality of filter screens and pipeline, and then gets into first cavity through a plurality of louvres, compares with prior art, dispels the heat to the signal processing circuit board, and the air gets into first cavity through settling the inside drier of box and does not have moisture, prevents that the signal processing circuit board from weing to break down and unable work.
Drawings
FIG. 1 is a schematic view of an overall front view structure provided by the present invention;
FIG. 2 is a schematic diagram of the assembled components of the present invention without a heat dissipation mechanism;
FIG. 3 is a schematic bottom view of the upper lid according to the present invention;
FIG. 4 is a schematic view of the internal structure of the lower cover according to the present invention;
FIG. 5 is a schematic top view of the heat dissipation mechanism according to the present invention;
FIG. 6 is a schematic cross-sectional view of a heat dissipation mechanism according to the present invention;
in the figure: 1. an upper cover; 2. a lower cover; 3. a touch steel ball; 4. a first recess; 5. a stainless steel diaphragm; 6. an oil filled stainless steel cavity; 7. a pressure sensing silicon wafer; 8. a silicone oil steel ball plug; 9. a signal processing circuit board; 10. a second recess; 11. an outlet; 12. heat dissipation holes; 13. placing a box; 14. a first filter screen; 15. a threaded hole; 16. a pipeline; 17. a second filter screen; 18. pressure sensitive silicone oil.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings 1-4 of the specification, the micro-touch sensor of the embodiment comprises an upper cover 1, a lower cover 2 is arranged below the upper cover 1, the upper cover 1 and the lower cover 2 are connected in a welding mode, good sealing performance between the upper cover 1 and the lower cover 2 is guaranteed, a plurality of first concave holes 4 and a plurality of second concave holes 10 are formed in the outer end of the upper cover 1 and the bottom end of the lower cover 2 respectively, manual positioning is facilitated when the first concave holes 4 and the second concave holes 10 are arranged and installed, a first cavity is formed inside the upper cover 1 and the lower cover 2, a detection mechanism is arranged inside the first cavity, and a heat dissipation mechanism is arranged at the bottom end of the lower cover 2;
the detection mechanism comprises a touch force steel ball 3, a rubber pad is fixedly arranged on the inner side of the top end of the upper cover 1, a stainless steel diaphragm 5 and an oil-filled stainless steel cavity 6 are arranged in the first cavity, the touch force steel ball 3 is fixedly arranged at the center of the top end of the stainless steel diaphragm 5, the top end of the touch force steel ball 3 is in contact extrusion with the rubber pad, the stainless steel diaphragm 5 is fixedly arranged on the inner side of the top end of the oil-filled stainless steel cavity 6, the top end of the oil-filled stainless steel cavity 6 is fixedly connected with the inner top end of the upper cover 1, pressure sensing silicone oil 18 is filled in the oil-filled stainless steel cavity 6, a signal processing circuit board 9 is fixedly arranged at the bottom end of the oil-filled stainless steel cavity 6, the signal processing circuit board 9 is arranged in the first cavity, a silicone oil ball plug 8 is inserted at the top end of the signal processing circuit board 9, the top end of the silicone oil ball plug 8 penetrates through the bottom end of the oil-filled stainless steel cavity 6 to be in contact with the pressure sensing silicone oil 18, the inside welding of signal processing circuit board 9 has experience pressure silicon chip 7, the fixed pressure probe that is equipped with in inside of signal processing circuit board 9, pressure probe and experience pressure silicon chip 7 electric connection, pressure probe and the contact of silicone oil steel ball stopper 8, the bottom of signal processing circuit board 9 and the inside bottom contact of lower cover 2, outlet 11, two have all been seted up to the inboard of upper cover 1 and the inboard of lower cover 2 the outlet 11 distributes from top to bottom and the two contact, outlet 11 and first cavity intercommunication, the inside fixed electric wire that is equipped with of signal processing circuit board 9, the electric wire passes through outlet 11 and is connected with external power supply and display, conveniently shows the pressure value on the display screen after detecting out the pressure value.
The implementation scenario is specifically as follows: the touch force steel ball 3 is pressed by fingers through a rubber pad, the stainless steel diaphragm 5 is elastically deformed by pressure through the touch force steel ball 3, the elastic force generated by the stainless steel diaphragm 5 acts on pressure-sensing silicon oil 18 in an oil-filled stainless steel cavity 6, the pressure-sensing silicon oil 18 is applied on a silicon oil steel ball plug 8 by downward pressure, the silicon oil steel ball plug 8 transmits the pressure to a pressure-sensing silicon chip 7 through a pressure probe in a signal processing circuit board 9, the pressure-sensing silicon chip 7 converts the pressure into an electric signal, the pressure value is displayed through a display screen, the device converts the touch force in the vertical direction of the steel ball into the signal output of a pressure chip, the signal is large, the repeatability is good, the minimum range can reach below 5 g, the embodiment specifically solves the problems that the touch force sensor in the prior art mostly adopts a strain gauge or a silicon chip glass micro-melting technology, and can detect the touch force larger than 1Kg of the upper cover, but the touch force output signal is small and the repeatability is poor when the touch force is less than 1Kg of the upper cover.
Referring to the attached drawings 1-6 of the specification, the micro-touch sensor of this embodiment, the heat dissipation mechanism includes a housing box 13, the housing box 13 is disposed at the bottom end of the lower cover 2 and disposed inside the plurality of second concave holes 10, the bottom end of the interior of the lower cover 2 is formed with a plurality of heat dissipation holes 12, the plurality of heat dissipation holes 12 all penetrate through the lower cover 2, the heat dissipation holes 12 are communicated with the interior of the housing box 13, a desiccant is disposed inside the housing box 13, the desiccant is disposed so that air entering the first cavity does not contain moisture, the exterior of the housing box 13 is formed with a plurality of threaded holes 15, the plurality of threaded holes 15 are communicated with the interior of the housing box 13, the top end of the housing box 13 is formed with first external threads, the bottom end of the heat dissipation hole 12 is formed with first internal threads, the heat dissipation hole 12 and the housing box 13 are respectively connected with the first external threads through the first internal threads, conveniently settle box 13 and lower cover 2 and dismantle, settle the inside of box 13 and insert and be equipped with first filter screen 14, inside the second cavity that the drier is located the bottom of first filter screen 14 and the inner wall of settling box 13 forms, prevent that the drier from getting into the inside of first cavity, the second internal thread has been seted up to the inside of screw hole 15, the inside of screw hole 15 is equipped with pipeline 16, second external screw thread has been seted up to the outer end of pipeline 16, screw hole 15 and pipeline 16 are respectively through second internal thread and second external screw thread connection, the one end of pipeline 16 extends inside screw hole 15, the fixed second filter screen 17 that is equipped with of one end of pipeline 16, and second filter screen 17 can keep apart external dust in this device outside, and heat dissipation mechanism dispels the heat and dehumidifies the inside 9 of first cavity.
The implementation scenario is specifically as follows: external air gets into the inside of settling box 13 through a plurality of filter screens 17 and pipeline 16, and then get into first cavity through a plurality of louvres 12, dispel the heat to signal processing circuit board 9, the air does not have moisture in getting into first cavity through settling box 13 inside drier, prevent that signal processing circuit board 9 from weing to break down and unable work, this embodiment has specifically solved the long-time work of general touch sensor inner circuit board among the prior art, the difficult emergence trouble of dispelling the heat easily appears, and then lead to touching the problem that the unable work of force sensor.
Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (8)
1. Micro-touch force sensor, including upper cover (1), its characterized in that: a lower cover (2) is arranged below the upper cover (1), a first cavity is formed inside the upper cover (1) and the lower cover (2), a detection mechanism is arranged inside the first cavity, and a heat dissipation mechanism is arranged at the bottom end of the lower cover (2);
the detection mechanism comprises a touch force steel ball (3), a rubber pad is fixedly arranged on the inner side of the top end of the upper cover (1), a stainless steel diaphragm (5) and an oil-filled stainless steel cavity (6) are arranged in the first cavity, the touch force steel ball (3) is fixedly arranged at the center of the top end of the stainless steel diaphragm (5), the top end of the touch force steel ball (3) is in contact extrusion with the rubber pad, the stainless steel diaphragm (5) is fixedly arranged on the inner side of the top end of the oil-filled stainless steel cavity (6), the top end of the oil-filled stainless steel cavity (6) is fixedly connected with the inner top end of the upper cover (1), pressure-sensitive silicone oil (18) is filled in the oil-filled stainless steel cavity (6), a signal processing circuit board (9) is fixedly arranged at the bottom end of the oil-filled stainless steel cavity (6), the signal processing circuit board (9) is arranged in the first cavity, a silicone oil ball plug (8) is inserted at the top end of the signal processing circuit board (9), the top of silicone oil steel ball stopper (8) runs through the bottom and the contact of feeling pressure silicone oil (18) of oil charge stainless steel cavity (6), the inside welding of signal processing circuit board (9) has feeling pressure silicon chip (7), the fixed pressure probe that is equipped with in inside of signal processing circuit board (9), pressure probe and feeling pressure silicon chip (7) electric connection, pressure probe and silicone oil steel ball stopper (8) contact, the bottom of signal processing circuit board (9) and the inside bottom contact of lower cover (2).
2. The micro-tactile sensor according to claim 1, wherein: the upper cover (1) is connected with the lower cover (2) in a welding mode.
3. The micro-tactile sensor according to claim 1, wherein: a plurality of first shrinkage pools (4) and a plurality of second shrinkage pools (10) have been seted up respectively to the outer end of upper cover (1) and the bottom of lower cover (2).
4. The micro-tactile sensor according to claim 3, wherein: the heat dissipation mechanism is including settling box (13), settle box (13) and establish the bottom at lower cover (2) and establish the inboard at a plurality of second shrinkage pools (10), a plurality of louvres (12) have been seted up to the inside bottom of lower cover (2), and are a plurality of louvre (12) all run through lower cover (2), louvre (12) are linked together with the inside of settling box (13), the drier has been placed to the inside of settling box (13), a plurality of screw holes (15) have been seted up in the outside of settling box (13), and are a plurality of screw hole (15) and the inside intercommunication of settling box (13).
5. The micro-tactile sensor according to claim 4, wherein: the heat dissipation hole is characterized in that a first external thread is formed in the top end of the placement box (13), a first internal thread is formed in the bottom end of the heat dissipation hole (12), and the heat dissipation hole (12) and the placement box (13) are connected through the first internal thread and the first external thread respectively.
6. The micro-tactile sensor according to claim 4, wherein: a first filter screen (14) is inserted into the placing box (13), and the drying agent is located in a second cavity formed by the bottom end of the first filter screen (14) and the inner wall of the placing box (13).
7. The micro-tactile sensor according to claim 4, wherein: the utility model discloses a pipeline, including screw hole (15), pipeline (16), screw hole (15), threaded hole (15), pipeline (16), the second internal thread has been seted up to the inside of screw hole (15), the pipeline (16) outer end has been seted up to the outer end of pipeline (16), screw hole (15) and pipeline (16) are respectively through second internal thread and the outer threaded connection of second, the one end of pipeline (16) extends inside screw hole (15), the fixed second filter screen (17) that is equipped with of one end of pipeline (16).
8. The micro-tactile sensor according to claim 4, wherein: wire outlets (11) are formed in the inner side of the upper cover (1) and the inner side of the lower cover (2), the two wire outlets (11) are distributed up and down and are in contact with each other, the wire outlets (11) are communicated with the first cavity, an electric wire is fixedly arranged in the signal processing circuit board (9), and the electric wire is connected with an external power supply and a display through the wire outlets (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122904978.9U CN216524530U (en) | 2021-11-24 | 2021-11-24 | Micro-touch force sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122904978.9U CN216524530U (en) | 2021-11-24 | 2021-11-24 | Micro-touch force sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216524530U true CN216524530U (en) | 2022-05-13 |
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ID=81532277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122904978.9U Active CN216524530U (en) | 2021-11-24 | 2021-11-24 | Micro-touch force sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216524530U (en) |
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2021
- 2021-11-24 CN CN202122904978.9U patent/CN216524530U/en active Active
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