CN220344619U - Heating cushion for electric wheelchair - Google Patents
Heating cushion for electric wheelchair Download PDFInfo
- Publication number
- CN220344619U CN220344619U CN202321658019.6U CN202321658019U CN220344619U CN 220344619 U CN220344619 U CN 220344619U CN 202321658019 U CN202321658019 U CN 202321658019U CN 220344619 U CN220344619 U CN 220344619U
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- pressure switch
- cushion
- pressure
- capacitor
- detection unit
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 39
- 239000000945 filler Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Resistance Heating (AREA)
Abstract
The utility model discloses a heating cushion for an electric wheelchair, which aims to solve the problem that the cushion of the electric wheelchair in the prior art needs to be manually opened and manually closed. The cushion is internally provided with a heater and a pressure sensor, the heater and the pressure sensor are respectively and electrically connected with the ECU, the pressure sensor comprises a pressure switch detection unit and at least two pressure switch groups which are mutually connected in series, the output end of each pressure switch group is connected with the input end of the pressure switch detection unit, and the output end of the pressure switch detection unit is connected with the ECU. According to the seat cushion, the plurality of groups of pressure switches are arranged, so that a series loop is formed between the pressure switch groups and the pressure switch detection units, and the function of detecting whether a person sits on the seat cushion is realized. The cushion pressure signal is converted into the on-off signal of the pressure switch, and the on-off signal of the pressure switch is converted into the output signal of the pressure switch detection unit, namely the high level and the low level, so that the purpose of converting whether a person sits on the cushion into electric signal transmission is achieved.
Description
Technical Field
The utility model relates to the technical field of wheelchair seats, in particular to a heating cushion for an electric wheelchair.
Background
The electric wheelchair is formed by superposing a high-performance power driving device, an intelligent operating device, a battery and other parts on the basis of the traditional manual wheelchair, and modifying and upgrading the parts; for people with mobility impairment requiring wheelchair as mobility support, the lower limb is usually at a lower temperature than the normal part due to unsmooth blood circulation or difficult to judge temperature due to nerve function obstruction.
Part of the electric wheelchair in the prior art has no cushion heating function, and is difficult to meet the requirements of people with mobility inconvenience; the other part of cushion has the heating function, but the heating function needs manual opening, and manual closing, but the heating function is not controlled, and the long-time heating easily enables the user to scald.
For example, a "wheelchair cushion and backrest cushion with heating function" disclosed in chinese patent literature, its bulletin number CN215535771U, including wheelchair cushion and backrest cushion, there are heating devices in said wheelchair cushion and backrest, said wheelchair cushion, seat backrest cushion are connected and set up together through elastic connection cloth, adjusting the connecting belt removably, there is a magic tape layer on the outer surface of the backrest cushion of wheelchair on another side of heating device set up in the backrest cushion of said wheelchair closely fixedly; a lower magic tape layer is tightly and fixedly arranged on the lower bottom surface of the wheelchair cushion; the upper part of the wheelchair backrest cushion is connected with an annular elastic binding belt. However, the heating device in the scheme needs to be manually powered on and powered off for heating; the heating temperature is not controlled, and the heating is performed for a long time, so that the problem of overhigh temperature can be caused.
Disclosure of Invention
The utility model aims to solve the problem that the cushion of the electric wheelchair needs to be manually opened and manually closed in the prior art, and provides the heating cushion for the electric wheelchair, wherein a pressure switch is arranged in the cushion, and a heating circuit is automatically triggered to open the cushion for heating, so that the convenience in use is improved.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a heating cushion for electronic wheelchair, be equipped with heater and pressure sensor in the cushion, heater and pressure sensor are connected with ECU electricity respectively, pressure sensor includes pressure switch detecting element, two at least group pressure switch group of establishing ties each other, the output of pressure switch group is connected with pressure switch detecting element's input, pressure switch detecting element's output is connected with ECU. The cushion is heated by the heater, the pressure sensor is used for detecting the pressure of the cushion, the ECU is used for acquiring the on-off signal of the pressure switch detection unit, the heating temperature of the heater is controlled according to the acquired on-off signal of the pressure switch detection unit, if the pressure switch detection unit outputs an off signal, the heater is heated to the first-order temperature, the constant temperature is maintained until the timer times t1 for a time delay, and the heater is turned off when the communication signal output by the pressure switch is not detected yet; if the pressure switch detection unit outputs a communication signal, the heater is heated to a second-order temperature, and the pressure sensor detects pressure to automatically trigger the heater to heat the cushion, so that the convenience of use is improved.
Preferably, the at least two pressure switch groups comprise a first pressure switch group and a second pressure switch group, one end of the first pressure switch group is connected with one end of the second pressure switch group, the other end of the first pressure switch group is connected with the first input end of the pressure switch detection unit, the other end of the second pressure switch group is connected with the second input end of the pressure switch detection unit, and the pressure switch group comprises a plurality of pressure switches connected in parallel. A series circuit is formed among the first pressure switch group, the second pressure switch group and the pressure switch detection unit, when at least one pressure switch of the first pressure switch group is closed and at least one pressure switch of the second pressure switch group is closed, the series circuit is conducted, and when all pressure switches of the first pressure switch group are opened and/or all pressure switches of the second pressure switch group are opened, the series circuit is disconnected, and the function of detecting whether a person sits on a cushion is achieved through the two groups of pressure switches.
Preferably, the pressure switch detecting unit includes: the first input end is connected with one end of a capacitor C11, the other end of the capacitor C11 is connected with one end of a capacitor C10, the other end of the capacitor C10 is connected with a power supply, one end of a resistor R9 is connected with the other end of the capacitor C10, the other end of the resistor R9 is connected with one end of the capacitor C11, the other end of the capacitor C11 is grounded, the second input end is connected with the other end of the capacitor C11, and the other end of the resistor R9 is output as an output end of a pressure switch detection unit. When the series loop is conducted, the output of the switch detection unit is grounded, and the output of the switch detection unit is low level; when the series circuit is disconnected, the output of the switch detection unit is communicated with the power supply, and the output of the switch detection unit is high level, so that whether a person sits on the cushion is converted into electric signal transmission. Further, the power supply is 3.3V or 5V.
Preferably, the pressure switch includes a lower electrode disposed below the upper electrode, the lower electrode being disposed in parallel with the upper electrode. When the pressure switch receives pressure to enable the upper electrode and the lower electrode to be closed, the pressure switch is closed, and the pressure required by closing the pressure switch can be adjusted by adjusting the distance between the upper electrode and the lower electrode.
Preferably, the heater comprises a heating wire and a temperature sensor, wherein the temperature sensor is arranged on one side of the heating wire, and the temperature sensor and the heating wire are electrically connected with the ECU. The temperature sensor is used for detecting the temperature of the cushion and transmitting the temperature to the ECU, so that the temperature detection function of the cushion is realized.
Preferably, the temperature sensor includes an NTC, one end of the NTC is connected with one end of a capacitor C7, the other end of the capacitor C7 is connected with one end of a capacitor C6, the other end of the capacitor C6 is connected with a power supply, one end of a resistor R7 is connected with the other end of the capacitor C6, the other end of the resistor R7 is connected with one end of the NTC, the other end of the NTC is grounded, and the other end of the resistor R7 is output as an output end of the temperature sensor. NTC is a thermistor with negative temperature coefficient, and the resistance of the resistor is reduced along with the temperature rise, and the temperature is measured by measuring the resistance of the resistor and converting the resistance of the resistor into a voltage value through a circuit. Further, the power supply is 3.3V or 5V.
Preferably, the cushion is internally filled with a filler, the heater is horizontally arranged above the filler, and the pressure sensor is horizontally arranged below the filler. The outer sides of the filler, the heater and the pressure sensor are coated with skins.
In summary, the utility model has the following beneficial effects: (1) According to the seat cushion, the plurality of groups of pressure switches are arranged, so that a series loop is formed between the pressure switch groups and the pressure switch detection units, and the function of detecting whether a person sits on the seat cushion is realized.
(2) The cushion pressure signal is converted into the on-off signal of the pressure switch, and the on-off signal of the pressure switch is converted into the output signal of the pressure switch detection unit, namely the high level and the low level, so that the purpose of converting whether a person sits on the cushion into electric signal transmission is achieved.
Drawings
Fig. 1 is a schematic cross-sectional view of a heating cushion for an electric wheelchair according to an embodiment of the present utility model.
Fig. 2 is a schematic view showing a heater structure of a heating cushion for an electric wheelchair according to an embodiment of the present utility model.
Fig. 3 is a schematic structural view of two pressure switch sets of a heating cushion for an electric wheelchair according to an embodiment of the present utility model.
Fig. 4 is a schematic view of a pressure switch structure of a heating cushion for an electric wheelchair according to an embodiment of the present utility model.
Fig. 5 is a circuit diagram of a temperature sensor and a pressure sensor for a heated cushion of an electric wheelchair according to an embodiment of the present utility model.
In the figure: 1. the cushion 2, the filler 3, the heater 31, the heating wire 32, the temperature sensor 4, the pressure sensor 41, the first pressure switch group 42, the second pressure switch group 43, the pressure switch 44, the upper electrode 45 and the lower electrode.
Detailed Description
The utility model is further described below with reference to the drawings and detailed description.
Example 1:
the utility model provides a heating for electronic wheelchair, as shown in fig. 1, the intussuseption is filled with filler 2, and filler 2 top is equipped with the zone of heating, and filler 2 below is equipped with pressure sensor 4, and filler 2, heater 3 and pressure sensor 4 outside cladding have the covering. The heater 3 includes a heater wire 31 and a temperature sensor 32 as shown in fig. 2, and the pressure sensor 4 includes a first pressure switch group 41 and a second pressure switch group 42 connected in series with each other as shown in fig. 3.
As shown in fig. 5, the heater 3 and the pressure sensor 4 are electrically connected to the ECU, respectively; the pressure sensor 4 includes a first pressure switch group 41, a second pressure switch group 42, and a pressure switch detection unit connected in series with each other, the first pressure switch group 41 including pressure switches K11, K12, K13, K14, K15, and K16 connected in parallel with each other; the second pressure switch group 42 includes pressure switches K21, K22, K23, K24, K25, and K26 connected in parallel with each other; one end of the pressure switch K11 is connected with one end of the pressure switch K21; one end of the pressure switch K26 is connected with a first input end of the pressure switch detecting unit, one end of the pressure switch K16 is connected with a second input end of the pressure switch detecting unit, as shown in fig. 4, the pressure switch 43 includes a lower electrode 45 with an upper electrode 44 disposed below the upper electrode 44, and the lower electrode 45 is disposed parallel to the upper electrode 44. When the pressure switch receives pressure to close the upper electrode 44 and the lower electrode 45, the pressure switch is closed, and the pressure required for closing the pressure switch can be adjusted by adjusting the distance between the upper electrode 44 and the lower electrode 45.
The pressure switch detection unit includes: the first input end is connected with one end of a capacitor C11, the other end of the capacitor C11 is connected with one end of a capacitor C10, the other end of the capacitor C10 is connected with a power supply, one end of a resistor R9 is connected with the other end of the capacitor C10, the other end of the resistor R9 is connected with one end of the capacitor C11, the other end of the capacitor C11 is grounded, the second input end is connected with the other end of the capacitor C11, and the other end of the resistor R9 is output as an output end of a pressure switch detection unit.
The temperature sensor 32 includes an NTC, one end of the NTC is connected to one end of the capacitor C7, the other end of the capacitor C7 is connected to one end of the capacitor C6, the other end of the capacitor C6 is connected to a power supply, one end of the resistor R7 is connected to the other end of the capacitor C6, the other end of the resistor R7 is connected to one end of the NTC, the other end of the NTC is grounded, and the other end of the resistor R7 is output as an output end of the temperature sensor 32. NTC is a thermistor with negative temperature coefficient, and the resistance of the resistor is reduced along with the temperature rise, and the temperature is measured by measuring the resistance of the resistor and converting the resistance of the resistor into a voltage value through a circuit.
In the working state, a series loop is formed among the first pressure switch group 41, the second pressure switch group 42 and the pressure switch detection unit, when at least one pressure switch of the first pressure switch group 41 is closed and at least one pressure switch of the second pressure switch group 42 is closed, the series loop is conducted, the output of the switch detection unit is grounded, and the output of the switch detection unit is low level;
when all the pressure switches of the first pressure switch group 41 are turned off and/or all the pressure switches of the second pressure switch group 42 are turned off, the series circuit is turned off, the output of the switch detection unit is connected with the power supply, the switch detection unit outputs a high level, and the function of detecting whether a person is seated or not is realized through the two groups of pressure switches.
The ECU is used for obtaining the break-make signal of pressure switch detecting element, according to the break-make signal of pressure switch detecting element who obtains, control the heating temperature of heater 3, if pressure switch detecting element output break-make signal, then heater 3 heats to first order temperature, if pressure switch detecting element output communication signal, then heater 3 heats to second order temperature, detects pressure automatic triggering heater 3 heating through pressure sensor 4, promotes the convenience of use.
Example 2: in this embodiment, the heating device is further provided with an external remote controller, and the external remote controller is in wireless communication connection with the ECU, and can send a signal to the ECU through the external remote controller to control the heating temperature of the heater 3.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Although the terms heater, first pressure switch group, pressure switch detection unit, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.
Claims (7)
1. The utility model provides a heating cushion for electronic wheelchair, its characterized in that is equipped with heater and pressure sensor in the cushion, heater and pressure sensor are connected with ECU electricity respectively, pressure sensor includes pressure switch detecting element, two at least pressure switch groups of establishing ties each other, the output of pressure switch group is connected with pressure switch detecting element's input, pressure switch detecting element's output is connected with ECU.
2. A heating cushion for an electric wheelchair according to claim 1, wherein the at least two sets of pressure switch sets comprise a first pressure switch set and a second pressure switch set, one end of the first pressure switch set being connected to one end of the second pressure switch set, the other end of the first pressure switch set being connected to a first input of the pressure switch detection unit, the other end of the second pressure switch set being connected to a second input of the pressure switch detection unit, the pressure switch sets comprising a number of pressure switches connected in parallel.
3. A heated cushion for an electric wheelchair according to claim 2, wherein the pressure switch detection unit comprises: the first input end is connected with one end of a capacitor C11, the other end of the capacitor C11 is connected with one end of a capacitor C10, the other end of the capacitor C10 is connected with a power supply, one end of a resistor R9 is connected with the other end of the capacitor C10, the other end of the resistor R9 is connected with one end of the capacitor C11, the other end of the capacitor C11 is grounded, the second input end is connected with the other end of the capacitor C11, and the other end of the resistor R9 is output as an output end of a pressure switch detection unit.
4. A heated cushion for an electric wheelchair according to claim 1 or 2 or 3, wherein the pressure switch comprises a lower electrode arranged below the upper electrode, the lower electrode being arranged in parallel with the upper electrode.
5. The heated cushion for an electric wheelchair of claim 4 wherein the heater comprises a heater wire and a temperature sensor disposed on one side of the heater wire, both the temperature sensor and the heater wire being electrically connected to the ECU.
6. The heated cushion for an electric wheelchair of claim 5 wherein the temperature sensor comprises an NTC, one end of the NTC is connected to one end of a capacitor C7, the other end of the capacitor C7 is connected to one end of a capacitor C6, the other end of the capacitor C6 is connected to a power source, one end of a resistor R7 is connected to the other end of the capacitor C6, the other end of the resistor R7 is connected to one end of the NTC, the other end of the NTC is grounded, and the other end of the resistor R7 is output as an output end of the temperature sensor.
7. A heated cushion for an electric wheelchair according to claim 1 or 5 or 6, wherein the cushion is internally filled with a filler, the heater is horizontally disposed above the filler, and the pressure sensor is horizontally disposed below the filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321658019.6U CN220344619U (en) | 2023-06-27 | 2023-06-27 | Heating cushion for electric wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321658019.6U CN220344619U (en) | 2023-06-27 | 2023-06-27 | Heating cushion for electric wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220344619U true CN220344619U (en) | 2024-01-16 |
Family
ID=89505739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321658019.6U Active CN220344619U (en) | 2023-06-27 | 2023-06-27 | Heating cushion for electric wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220344619U (en) |
-
2023
- 2023-06-27 CN CN202321658019.6U patent/CN220344619U/en active Active
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