CN113287894A - Multifunctional bed and multi-drive switch protection circuit - Google Patents
Multifunctional bed and multi-drive switch protection circuit Download PDFInfo
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- CN113287894A CN113287894A CN202110558856.0A CN202110558856A CN113287894A CN 113287894 A CN113287894 A CN 113287894A CN 202110558856 A CN202110558856 A CN 202110558856A CN 113287894 A CN113287894 A CN 113287894A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C17/00—Sofas; Couches; Beds
- A47C17/86—Parts or details for beds, sofas or couches only not fully covered in a single one of the sub-groups A47C17/02, A47C17/04, A47C17/38, A47C17/52, A47C17/64, or A47C17/84; Drawers in or under beds
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C19/00—Bedsteads
- A47C19/02—Parts or details of bedsteads not fully covered in a single one of the following subgroups, e.g. bed rails, post rails
- A47C19/021—Bedstead frames
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
- A47C31/123—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for beds or mattresses
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Abstract
The invention discloses a multifunctional bed and a multi-drive switch protection circuit, wherein in the device, when a switch group is not triggered to start by a user, all electric signal transmission paths are in a disconnected state, and after the switch group is started by the user operation, an MOS tube unit is controlled to be conducted after delaying an arc extinguishing time period according to the arc extinguishing time preset by a micro control unit, so that the corresponding electric signal transmission paths are conducted, and the corresponding load drive devices connected with the switch group run after the switch group is triggered to start and the arc extinguishing time period, so as to drive bed components of a bed main body to adjust the corresponding postures. The invention simplifies the manufacturing process of the control technology of the multifunctional bed, effectively reduces the manufacturing cost and the production cost of equipment, and is more stable, higher in safety and higher in reliability when the switch is started.
Description
Technical Field
The invention relates to the field of switch circuit protection and multifunctional bed design, in particular to a multifunctional bed and a multi-drive switch circuit protection device.
Background
The existing multifunctional bed can help patients and old people to adjust various postures such as lying and sitting, and is widely applied to hospitals, nursing homes and user families. The existing multifunctional bed is controlled intelligently, for example, equipment such as a visual operation screen and a microcomputer is adopted for control, but the higher the intellectualization is, the higher the corresponding equipment cost is, for some families, the intelligent equipment needs to consume too much family cost, the multifunctional bed does not need to be too complicated, the cost is not too high, compared with a common bed, the basic lying and sitting posture adjustment purpose is realized, and the inventor designs the multifunctional bed control device.
The existing multifunctional bed control technology generally comprises a trigger button, a controller, a plurality of load driving devices and a power supply device for supplying power to the load driving devices, wherein the output end of each load driving device is generally connected with each assembly unit of the multifunctional bed, and the assembly units of the multifunctional bed are controlled to carry out various postures (such as lifting or descending of the units where lower limbs are located). The control technology generally comprises two signal paths: a control signal path and an electrical signal path. The trigger button receives a trigger signal generated by a user trigger operation, then the trigger signal is sent to the controller, the controller sends a corresponding control signal to the corresponding load driving device to trigger the corresponding posture adjustment of the load driving device, and the path is called as a control signal path. The power supply additionally supplies power to the load driving device, which is referred to as an electrical signal path. Therefore, in the prior art, the control signal path and the electric signal path are respectively arranged, the power supply device, the controller, the trigger button and various load driving devices are independent, and the controller and the load driving devices need to be respectively connected with the power supply device, so that the whole system has more parts and higher cost.
Disclosure of Invention
The embodiment of the application solves the technical problem that the service life of the whole switch circuit is influenced because the switch is damaged due to overlarge instantaneous conduction current or electric arc generated in the posture control technology of the multifunctional bed, and achieves the beneficial effect that a time delay program is set before the conduction current to enable the switch to conduct the current after time delay to protect the service life of the switch.
In a first aspect, an embodiment of the present application provides a multifunctional bed, including a bed body containing a plurality of bed components, further including: the bed comprises a switch control device for receiving the posture adjustment of various bed components of a bed body controlled by a user, various load driving devices arranged on the bed body and used for controlling the posture change of the bed components, a power supply control device used for controlling electric signal transmission and a power supply device used for supplying power, wherein an electric signal transmission passage is formed among the switch control device, the power supply device and the various load driving devices, the power supply is supplied to the load driving devices, and the adaptive load driving devices are controlled to trigger the corresponding posture adjustment of the bed components;
the switch control device comprises at least one input end and a plurality of output ends, the input end is connected with the power supply control device, each output end of the switch control device is at least connected with one adaptive load driving device, the switch control device is used for being adaptive to the load driving devices and is arranged for receiving a switch group corresponding to user starting operation, and the corresponding load driving devices are controlled to move in a preset direction through the switch group; the number of the load driving devices is matched with the number of the switch groups;
the power supply control device comprises a micro control unit, an MOS tube unit and a switch detection unit for detecting the switch group started by the operation of a user, wherein the micro control unit is respectively connected with the MOS tube unit and the switch detection unit; wherein, the micro control unit presets arc extinguishing time;
the power supply device is connected with the power supply control device, the power supply control device is connected with the input end of the switch control device, the output end of the switch control device is respectively connected with the adaptive load driving devices, the input end of the switch control device is connected with all the switch groups in parallel, and each switch group is connected with the adaptive load driving device;
when the switch group is not triggered to start by a user, all the electric signal transmission paths are in a disconnected state, and after the switch group is started by the user, the MOS tube unit is controlled to be conducted after delaying the arc extinguishing time period according to the arc extinguishing time preset by the micro control unit, so that the corresponding electric signal transmission paths are conducted, the load driving device corresponding to the switch group is operated after the switch group is triggered to start at the interval arc extinguishing time period, and the bed assembly of the bed main body is driven to adjust the corresponding posture.
Furthermore, the switch group is a switch pair, each switch pair comprises an uplink switch and a downlink switch, and one of the uplink switch and the downlink switch is triggered and started to enable the electric signal transmission path where the switch control device is located to be conducted;
the switch detection unit is positioned on the electric signal transmission path where the power supply control device is positioned, and when the electric signal transmission path is conducted, the switch detection unit generates a corresponding electric signal; the micro control unit controls the MOS tube unit to be conducted in a delayed mode according to the electric signals generated by the switch detection unit, so that the electric signals generated by the switch detection unit pass through the MOS tube unit after the arc extinguishing time period is delayed, and then pass through the uplink switch/the downlink switch which is triggered and started to control the output end of the connected load driving device to move, and therefore the bed assembly is driven to move upwards or downwards in a corresponding posture.
Further, the switch detection unit includes a resistance RS1 adapting to the up switch and a resistance RS2 adapting to the down switch,
the MOS tube unit comprises an MOS tube Q7 matched with the uplink switch and an MOS tube Q6 matched with the downlink switch; the micro control unit comprises a first input pin and a second input pin;
one end of the resistor RS1 is grounded, and the other end of the resistor RS1 is respectively connected with a first input pin of the micro control unit and the source/drain of the MOS transistor Q7; one end of the resistor RS2 is grounded, the other end of the resistor RS2 is connected with a second input pin of the micro control unit and the source/drain electrode of the MOS tube Q6, an electric signal generated by trigger operation is detected through the resistor RS1 or the resistor RS2, and a trigger signal is sent to the micro control unit.
Further, the micro control unit includes an output pin, and the output pin of the micro control unit is connected to the gates of the MOS transistor Q7 and the MOS transistor Q6, respectively, and is configured to delay a set arc extinguishing time and then send a signal to the gate, so as to turn on the corresponding MOS transistor Q7 or the corresponding MOS transistor Q6.
Further, the arc extinguishing time is set to 150-.
And further, the micro control unit is also provided with error touch detection time, whether the duration time of the electric signal generated by the switch detection unit is higher than the error touch detection time or not is judged according to the comparison of the error touch detection time, if so, the MOS tube unit is controlled to be conducted in a delayed mode according to the generated electric signal, and if not, the electric signal generated by the switch detection unit is continuously received.
Further, the micro control unit comprises a ROM program memory and a timing clock, the timing clock is used for presetting arc extinguishing time and false touch detection time,
the ROM program memory is preset with a switch circuit protection program, the switch circuit protection program controls the conduction delay arc extinguishing time period of the MOS tube unit, and the duration time of the electric signal generated by the switch detection unit is compared with the false touch detection time, so that the electric signal generated by the switch detection unit due to false touch is prevented.
Furthermore, a plurality of light emitting diodes which are connected in series and in parallel are arranged in the switch control device, and the switch control device is electrically connected with the power supply, so that when the switch control device is electrically connected with the power supply control device, the power supply continuously supplies power to the light emitting diodes.
Further, the load driving device comprises a first driving device, a second driving device and a third driving device,
the switch group comprises a first switch pair, a second switch pair and a third switch pair; the bed assembly of the bed body comprises a leg unit, a head unit and a bed frame unit;
the first switch pair is connected with the first driving device and used for controlling the bed body to adjust the posture of the leg unit so as to enable the bed body to move upwards/downwards;
the second switch pair is connected with the second driving device and used for controlling the bed body to adjust the posture of the head unit so that the head unit can move upwards/downwards;
the third switch pair is connected to the third driving device, and is used for controlling the bed body to perform posture adjustment of the bed frame unit so as to enable the bed body to perform upward movement/downward movement.
In a second aspect, an embodiment of the present application provides a multi-driver switch protection circuit, which is adapted to the multifunctional bed in any one of the first aspects, and includes a power control circuit and a switch control circuit; the power supply control circuit is connected with a power supply device, and the switch control circuit is connected with various load driving devices; the switch control circuit, the power supply control device, the power supply device and the plurality of load driving devices form an electric signal transmission channel to supply power to the load driving devices and complete the adaptation of the load driving devices to trigger the load driving devices to drive corresponding load carriers to move;
the switch control circuit is provided with a switch group corresponding to the receiving of user starting operation for adapting the load driving device, and controls the load driving device to move in a preset direction through the switch group; the number of the load driving devices is matched with the number of the switch groups;
the power supply control circuit comprises a micro control circuit, an MOS tube circuit and a detection switch circuit for detecting that the switch group is started by the operation of a user, wherein the micro control circuit is respectively connected with the MOS tube circuit and the detection switch circuit; the micro-control circuit is preset with arc extinguishing time;
the power supply control circuit is connected with the input end of the switch control circuit, the output end of the switch control circuit is respectively connected with the adaptive load driving devices, the input end of the switch control circuit is connected with all the switch groups in parallel, and each switch group is connected with the adaptive load driving device;
when the switch group is not triggered to start by a user, all the electric signal transmission paths are in a disconnected state, and after the switch group is started by the user, the MOS tube circuit is controlled to be switched on after delaying the arc extinguishing time period according to the arc extinguishing time preset by the micro control circuit, so that the corresponding electric signal transmission paths are switched on, and the load driving device corresponding to the switch group operates after the switch group is triggered to start and the arc extinguishing time period is separated, so as to drive the corresponding load carrier to perform corresponding posture adjustment.
Furthermore, the switch group is a switch pair, each switch pair comprises an uplink switch and a downlink switch, and one of the uplink switch and the downlink switch is triggered and started to enable the electric signal transmission path where the switch control circuit is located to be conducted;
the switch detection circuit is positioned on the electric signal transmission path where the power supply control circuit is positioned, and when the electric signal transmission path is conducted, the switch detection circuit generates a corresponding electric signal; the micro control circuit controls the time delay conduction of the MOS tube circuit according to the electric signal generated by the switch detection circuit, so that the electric signal generated by the switch detection circuit passes through the MOS tube circuit after the time delay arc extinguishing period and then passes through the uplink switch/the downlink switch which is triggered and started to control the output end of the connected load driving device to move, and therefore the load carrier is driven to carry out uplink motion or downlink motion of corresponding postures.
Further, the switch detection circuit includes a resistance RS1 adapted to the up switch and a resistance RS2 adapted to the down switch,
the MOS tube circuit comprises an MOS tube Q7 matched with the uplink switch and an MOS tube Q6 matched with the downlink switch; the micro control circuit comprises a first input pin and a second input pin;
one end of the resistor RS1 is grounded, and the other end of the resistor RS1 is respectively connected with a first input pin of the micro-control circuit and the source/drain of the MOS transistor Q7; one end of the resistor RS2 is grounded, the other end of the resistor RS2 is respectively connected with a second input pin of the micro-control circuit and the source/drain electrode of the MOS tube Q6, an electric signal generated by trigger operation is detected through the resistor RS1 or the resistor RS2, and a trigger signal is sent to the micro-control circuit.
Further, the micro control circuit includes an output pin, and the output pin of the micro control circuit is connected to the gates of the MOS transistor Q7 and the MOS transistor Q6, respectively, and is configured to delay a set arc extinguishing time and then send a signal to the gate, so as to turn on the corresponding MOS transistor Q7 or the corresponding MOS transistor Q6.
The multifunctional bed and the multi-drive switch protection circuit provided in the embodiment of the application have at least the following technical effects:
1. because the switch control device is adopted to directly control each load driving device to work, and control programs on various work are not carried out on each load driving device, which is equivalent to the fact that the switch control device is directly used as the current conduction function of the load driving device, the manufacturing process of the multifunctional bed control device is simplified, and the manufacturing cost and the equipment production cost are effectively reduced.
2. In the multifunctional bed control device, the switch control device is used as a middleware of the power supply control device and the load driving device, so that the whole device is simple in structure and convenient to maintain.
3. The false touch detection time is preset in the adopted switch circuit protection strategy, so that the electric signal is changed into the switch closing signal, whether the reason for generating the switch closing signal is false triggering or not is judged, intermittent false opening caused by poor contact of the switch control device is avoided, and the service life of the switch control device is prolonged.
4. Because the arc extinguishing time has been predetermine in the switching circuit protection strategy of adoption, when a light touch button switch in the on-off control device triggers the closure, produce the closed signal of continuation switch, after lasting arc extinguishing time interval, switch on MOS pipe circuit, make the signal of telecommunication earlier through MOS pipe circuit, through light touch button switch, just get into load drive arrangement again to make the switch on the on-off control device when the closure switches on, more stable, the security is higher, the reliability is higher.
Drawings
Fig. 1 is a block diagram of a driving structure of a multifunctional bed according to a first embodiment of the present application;
fig. 2 is a block diagram of a driving control structure of a multifunctional bed according to a first embodiment of the present application;
fig. 3 is a partial structural view of a multifunctional bed body according to a first embodiment of the present application;
fig. 4 is a block diagram of a switch protection circuit according to a second embodiment of the present application;
fig. 5 is a circuit diagram of a circuit board of a switch control circuit according to a second embodiment of the present application;
FIG. 6 is a schematic diagram of a power management circuit in a power control circuit according to a second embodiment of the present application;
fig. 7 is a flowchart of a protection method for a switch protection circuit according to a second embodiment of the present application;
fig. 8 is a flowchart of another protection method for a switch protection circuit according to a second embodiment of the present application.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
The embodiment of the application provides a multifunctional bed, including the bed body that contains multiple bed subassembly, this bed body can assist the person in bed to carry out multi-attitude adjustment, for example supplementary the person in bed sits up or lies down, the shank curls or straightens, the bed wholly rises or descends. The bed body in this embodiment can be understood as a nursing bed having the above-described basic posture adjustment. In order to control the bed body to start, referring to fig. 1-2, the present embodiment further includes: the bed comprises a switch control device 200 for receiving the posture adjustment of various bed components of a user control bed body, various load driving devices 300 arranged on the bed body and used for controlling the posture change of the bed components, a power supply control device 100 used for controlling the transmission of electric signals and a power supply device used for supplying power. The power control device 100 is connected to a power supply device, which may be, but is not limited to, a 220V indoor power supply.
In this embodiment, an electrical signal transmission path is formed between the switch control device, the power supply device and the various load driving devices to supply power to the load driving devices and control the adaptive load driving devices to trigger the posture adjustment of the corresponding bed assembly. The power supply device is detachably connected with the power supply control device, and the switch control device is detachably connected with the power supply device and the load driving device.
The switch control device 200 in this embodiment includes at least one input terminal and a plurality of output terminals, the input terminal is connected to the power control device 100, each output terminal is connected to at least one adaptive load driving device 300, and the switch control device 200 is configured to receive a switch group corresponding to user activation and control for the adaptive load driving device 300, and the switch group controls the corresponding load driving device 300 to perform movement in a preset direction.
For further illustration, the switch control device 200 in this embodiment is a handheld device integrating several switches, the power control device 100 may be a simplified version of a power adapter, and the load driving device 300 may be a driving device. The switch control device 200 is electrically connected to the power control device 100 and the load driving device 300, respectively, and when a switch in the switch control device 200 is turned on, the power control device 100 supplies power to the load driving device.
And the number of the load driving devices in this embodiment is adapted to the number of the switch groups. For example, the number of the load driving devices is 3, the number of the corresponding switch groups is also 3, and each switch group in the embodiment corresponds to one load driving device. The design of switch block in this embodiment can adopt micro-gap switch, ship type switch, button switch, toggle switch, button switch etc. and load drive arrangement's output includes two direction movements, and allows speed to keep unchangeable, and for the person of facilitating the use can be according to health comfort level control load drive arrangement's output, when driving the multi-functional bed gesture promptly and adjusting best comfortable position, the disconnection of control switch group, preferably adopt micro-gap switch, control is opened and is closed one step and target in place to the control, and the switch of other structures needs two steps at least.
The start operation for each switch group is adapted to the output end of the load driving device, for example, the load driving device is a stepping motor, and the output shaft of the load driving device rotates in the forward direction or in the reverse direction, so that two operations are adapted to the switch group, one operation is to rotate the output shaft of the stepping motor in the forward direction, and the other operation is to rotate the output shaft of the stepping motor in the reverse direction.
The power control device in this embodiment includes a micro control unit, an MOS transistor unit, and a switch detection unit for detecting that the switch block is started by a user operation, where the micro control unit is connected to the MOS transistor unit and the switch detection unit, respectively. The micro control unit presets arc extinguishing time.
In this embodiment, the power supply device is connected to the power supply control device, the power supply control device is connected to the input end of the switch control device, the output end of the switch control device is respectively connected to the adaptive load driving devices, the input end of the switch control device is connected to all the switch groups in parallel, and each switch group is connected to the adaptive load driving device, so as to form an electrical signal transmission channel.
In this embodiment, when the switch group is not triggered to start by a user, all the electrical signal transmission paths are in a disconnected state, and after the switch group is started by the user, the MOS transistor unit is controlled to be turned on after delaying the arc extinguishing time period according to the arc extinguishing time preset by the micro control unit, so that the corresponding electrical signal transmission paths are turned on, thereby implementing that the load driving device corresponding to the switch group is operated after the switch group is triggered to start at the arc extinguishing time interval, so as to drive the bed component of the bed main body to perform adjustment of the corresponding posture.
Further, the arc extinguishing time is designed mainly to avoid damage to the entire switch control device due to excessive instantaneous conduction current or arc generation when the switch set is started, so that the arc extinguishing time is preset in the embodiment; when any switch group triggers the start operation, when the switch detection unit generates the continuous electric signal, the MOS tube unit is controlled to be conducted after the electric signal lasts for the arc extinguishing time, and then the arc extinguishing time is utilized to delay the electric signal of the switch group, so that the switch group triggers the start operation time to stagger the electric signal passing time, the arc extinguishing time is arranged at intervals, and the closing time of the light touch button switch is always higher than the electric signal conducting time. Furthermore, when the switch circuit is pressed to be closed through a delay program, the switch circuit is conducted after the arc extinguishing time is delayed, and the MOS tube unit is conducted, so that the electric signal enters the switch circuit after passing through the MOS tube unit. The arc extinguishing time in the present embodiment is set to 150-300 ms, and preferably, the arc extinguishing time is preset to 200 ms. Further, when the trigger switch group is started, the micro control unit judges that the electric signal is generated due to the fact that the switch group is triggered according to the electric signal generated by the switch detection unit. And then realize according to arc extinguishing time and the signal of telecommunication that lasts, control MOS pipe unit switches on after lasting arc extinguishing time, and then further realize the signal of telecommunication of switch group through time delay arc extinguishing time, make switch group trigger operation start to the signal of telecommunication process time stagger to there is the arc extinguishing time at the interval, avoid dabbing button switch and lead to the too big electric arc that produces of electric current when pressing the closure.
Furthermore, the switch group is a switch pair, each switch pair comprises an uplink switch and a downlink switch, and one of the uplink switch and the downlink switch is triggered and started to enable the electric signal transmission path where the switch control device is located to be conducted. Further, the switch detection unit is located on the electrical signal transmission path where the power control device is located, and when the electrical signal transmission path where the switch control device is located is conducted, the switch detection unit generates a corresponding electrical signal. In this embodiment, the switch detection unit and the switch block are located in an electrical signal transmission path loop, and when the switch block is triggered to start, the switch detection unit is triggered to start due to the fact that the switch block is connected with the power supply device in advance, so that the electrical signal transmission channel where the switch block is located is conducted, and the switch detection unit detects that the switch block is conducted to generate a corresponding electrical signal.
Further, the up switch in this embodiment is used to control the corresponding load driving device 300 to drive the bed assembly to perform the up motion of the corresponding posture, and the down switch is used to control the corresponding load driving device 300 to drive the bed body to perform the down motion of the corresponding posture. The upper switch/the lower switch in this embodiment may adopt a light touch button switch, that is, after the user continuously presses the light touch button switch, the electrical signal transmission path where the light touch button switch is located is turned on, so that the switch detection unit generates an electrical signal and the electrical signal passes through the upper switch/the lower switch to supply power to the corresponding load driving device, and when the light touch button switch is released, the power supply loop of the load driving device connected to the light touch button switch is disconnected.
In this embodiment, the micro control unit controls the MOS transistor unit to be turned on in a delayed manner according to the electrical signal generated by the switch detection unit, so that the electrical signal generated by the switch detection unit passes through the MOS transistor unit after the arc extinguishing time period is delayed, and then passes through the triggered and started uplink switch/downlink switch to control the connected output end of the load driving device to move, thereby driving the bed assembly to perform uplink motion or downlink motion corresponding to the posture. Therefore, when the switch group of the switch control device triggers the starting operation, the electric signal of the power supply device does not directly pass through the switch control device, but needs to be transmitted to the switch group of the switch control device after signal detection, transmission delay and channel conduction steps in the power supply control device, so that the triggering starting operation and the electric signal are staggered, the condition of generating electric arcs is avoided, and the safety and the stability of the device are improved.
The switch detection unit in this embodiment includes a resistor RS1 adapted to the up switch and a resistor RS2 adapted to the down switch, and the MOS transistor unit includes an MOS transistor Q7 adapted to the up switch and an MOS transistor Q6 adapted to the down switch; the micro control unit comprises a first input pin IS1 and a second input pin IS 2. One end of the resistor RS1 is grounded, and the other end of the resistor RS1 is respectively connected with a first input pin of the micro control unit and the source/drain of the MOS transistor Q7; one end of the resistor RS2 is grounded, the other end of the resistor RS2 is connected with a second input pin of the micro control unit and the source/drain electrode of the MOS tube Q6, an electric signal generated by trigger operation is detected through the resistor RS1 or the resistor RS2, and a trigger signal is sent to the micro control unit.
The mcu in this embodiment includes an output pin Drv, and the output pin Drv of the mcu is respectively connected to the gates of the MOS transistor Q7 and the MOS transistor Q6, and is configured to delay a set arc extinguishing time and then send a signal to the gate to turn on the corresponding MOS transistor Q7 or the corresponding MOS transistor Q6.
Further, when the up switch IS triggered to start, the resistor RS1 generates a corresponding electrical signal according to a preset resistance value, the micro control unit receives the electrical signal generated by the resistor RS1 through the first input pin IS1, and controls the delayed conduction of the MOS transistor Q7 according to the arc extinguishing time, so that the electrical signal generated by the resistor RS1 sequentially passes through the MOS transistor Q7 and the up switch triggered to start, and then supplies power to the connected load driving device, so that the load driving device performs a preset direction movement according to the corresponding electrical signal, and thereby drives the corresponding bed component to perform an up movement of a corresponding posture.
When the downlink switch IS triggered to start, the resistor RS2 generates a corresponding electric signal according to a preset resistance value, the micro control unit receives the electric signal generated by the resistor RS2 through a second input pin IS2, and controls the delayed conduction of the MOS tube Q6 according to the arc extinguishing time, so that the electric signal generated by the resistor RS2 sequentially passes through the MOS tube Q6 and the downlink switch triggered to start, and then power IS supplied to the connected load driving device, so that the load driving device can move in a preset direction according to the corresponding electric signal.
In one embodiment, the micro control unit is further provided with a false touch detection time, whether the duration time of the electric signal generated by the switch detection unit is longer than the false touch detection time is judged according to the comparison of the false touch detection time, if so, the MOS transistor unit is controlled to be conducted in a delayed mode according to the generated electric signal, and if not, the electric signal generated by the switch detection unit is continuously received. And the detection time of the false touch preset by the switch circuit protection strategy is used for judging the continuity of the electric signal generation, so that the false touch is avoided. In this embodiment, a touch button switch is adopted, that is, the touch button switch needs to be pressed to be conducted, and generally, the touch button switch is conducted when being pressed by mistake, in this embodiment, a first judgment basis is set based on this situation, for example, when the detection time of the touch button switch is preset to be 30ms, the touch button switch is judged to be not touched by mistake but normally used, after a correct judgment result is given, the touch button switch enters the next link, receives an electric signal again to detect the generation of the electric signal, or the signal delay transmission control enables the preparation MOS transistor unit to be conducted.
Further, the micro control unit in this embodiment includes a ROM program memory and a time clock, the arc extinguishing time and the false touch detection time are preset by the time clock, a switch circuit protection program is preset in the ROM program memory, the MOS transistor circuit is controlled to be turned on by the switch circuit protection program to delay the arc extinguishing time period, and the duration time of the electrical signal generated by the switch detection unit is compared with the false touch detection time, so as to prevent the electrical signal generated by the switch detection unit due to false triggering.
Therefore, it can be known that the micro control unit 112 in the present embodiment presets the false touch detection time and the arc extinguishing time. Firstly, receiving an electric signal generated by a switch detection unit, wherein the generation of the electric signal means that a switch group is started by user operation; secondly, judging whether a false triggering event occurs or not according to a switch circuit protection program and false touch detection time, judging whether the duration time of the generated electric signal is higher than the false touch detection time or not through comparison, if so, controlling the MOS tube unit 113 to perform signal transmission after delay conduction according to the generated electric signal, and if not, continuously receiving the electric signal generated by the switch detection unit 111; thirdly, the MOS tube unit is controlled to be conducted after the electric signal is generated and the arc extinguishing time period is continued according to the arc extinguishing time, further leading the signal conduction of the switch group to delay the arc extinguishing time period, leading the time from the starting operation triggering time of the switch group to the signal passing time to be staggered, and arc extinguishing time periods are arranged at intervals, the starting operation duration time of the switch group is always longer than the signal conduction time of the switch group, the electric signals sequentially pass through the micro control unit 112, the MOS tube unit 113 and the uplink switch/downlink switch in the switch group, and transmitted to the load driving device 300 electrically connected with the switch group to realize that the load driving device 300 connected with the switch group operates after the switch group triggers the start interval arc extinguishing time period to drive the bed assembly to adjust the corresponding posture, therefore, when the posture of the bed body of the multifunctional bed is adjusted, the switch control device 200 can safely, effectively and inexpensively perform drive control.
In one embodiment, the multifunctional bed has a posture adjusting function for the person on the bed including sitting up, leg flexion and extension, and overall lifting, and further, the load driving device includes a first driving device, a second driving device, and a third driving device. The switch group comprises a first switch pair, a second switch pair and a third switch pair; the bed assembly of the bed body includes a leg unit, a head unit, and a bed frame unit. The first switch pair is connected with the first driving device and used for controlling the bed body to adjust the posture of the leg unit so that the bed body can move upwards/downwards; the second switch pair is connected with the second driving device and used for controlling the bed body to adjust the posture of the head unit so as to enable the bed body to move upwards/downwards; the third switch pair is connected with the third driving device and used for controlling the bed body to adjust the posture of the bed frame unit so as to enable the bed body to move upwards/downwards.
Further, the structure of the multifunctional bed comprises a bed frame, support legs and a bed board, wherein the support legs are arranged below the bed frame unit, the bed board is arranged in the bed frame, as shown in fig. 3, the bed board comprises a head unit a1, a middle unit a2, a leg unit A3 and a foot unit a4, the head unit a1 is hinged with the middle unit, the middle unit a2 is hinged with the leg unit, the leg unit A3 is hinged with the foot unit a4, and the middle unit is fixedly connected to the bed frame. Further, the first driving device is used for controlling the leg unit A3 to move so as to drive the leg of the person on the bed to bend or straighten, the second driving device is used for controlling the head unit A1 to move so as to drive the person on the bed to sit up or lie down, and the third driving device is used for controlling the bed frame unit to move so as to drive the person on the bed to ascend or descend.
Furthermore, the first switch pair comprises an uplink switch S-1 and a downlink switch S-2, wherein the uplink switch S-1 is connected with the first driving device and controls the uplink motion H + thereof, and the downlink switch S-2 is connected with the first driving device and controls the downlink motion H-thereof; the second switch pair comprises an uplink switch S-3 and a downlink switch S-4, wherein the uplink switch S-3 is connected with the second driving device and controls the uplink movement L + thereof, and the downlink switch S-4 is connected with the second driving device and controls the downlink movement L-; the third switch pair comprises an ascending switch S-5 and an ascending switch S-6, the ascending switch S-5 is connected with the third driving device to control the ascending movement F +, and the descending switch S-6 is connected with the third driving device to control the descending movement F-.
In addition, in an embodiment, a plurality of light emitting diodes connected in series and in parallel are disposed in the switch control device 200, and are electrically connected to the power supply through the power supply control device, so that when the switch control device is electrically connected to the power supply control device, the power supply continuously supplies power to the light emitting diodes. Furthermore, the surface of the switch control device is made of a soft, elastic and light-transmitting silica gel material. Further, the light emitting diode continuously emits light and penetrates out along the surface of the switch control device to generate backlight, so that the operation starting is facilitated in the dark and in the absence of light.
Example two
Referring to fig. 4 to 6, the embodiment of the present application provides a multi-driving switch protection circuit, which is adapted to any one of the multifunctional beds described in the embodiments, although the acting object of the present application is not limited to the multifunctional bed, such as a massage chair, a sofa, etc.
The multi-drive switch protection circuit in the embodiment comprises a power supply control circuit and a switch control circuit; of course, both the power control circuit and the switch control circuit are arranged on the circuit board. The power supply control circuit is connected with a power supply device, and the switch control circuit is connected with various load driving devices; the switch control circuit, the power supply control device, the power supply device and the plurality of load driving devices form an electric signal transmission channel to supply power to the load driving devices and complete the adaptation of the load driving devices to trigger the load driving devices to drive corresponding load carriers to move. Wherein, the load carrier can be, but is not limited to, the multifunctional bed in the first embodiment.
Furthermore, two ends of the switch control circuit are provided with an input end and a plurality of output ends, the input end is connected with the power supply control circuit, each output end of the switch control circuit is at least connected with an adaptive load driving device, the switch control circuit is used for being matched with the load driving device and is arranged for receiving a switch group corresponding to the starting operation of a user, and the switch group controls the load driving device to move in a preset direction; and the number of the load driving devices is matched with the number of the switch groups.
The power supply control circuit comprises a micro control circuit, an MOS tube circuit and a detection switch circuit for detecting that the switch group is started by the operation of a user, wherein the micro control circuit is respectively connected with the MOS tube circuit and the detection switch circuit; the micro-control circuit is preset with arc extinguishing time.
The power supply control circuit is connected with the input end of the switch control circuit, the output end of the switch control circuit is respectively connected with the adaptive load driving devices, the input end of the switch control circuit is connected with all the switch groups in parallel, and each switch group is connected with the adaptive load driving device;
when the switch group is not triggered to start by a user, all the electric signal transmission paths are in a disconnected state, and after the switch group is started by the user, the MOS tube circuit is controlled to be switched on after delaying the arc extinguishing time period according to the arc extinguishing time preset by the micro control circuit, so that the corresponding electric signal transmission paths are switched on, and the load driving device corresponding to the switch group operates after the switch group is triggered to start and the arc extinguishing time period is separated, so as to drive the corresponding load carrier to perform corresponding posture adjustment.
The switch group in this embodiment is a switch pair, each switch pair includes an uplink switch and a downlink switch, and one of the uplink switch and the downlink switch is triggered and started to turn on the electrical signal transmission path where the switch control circuit is located; the switch detection circuit is positioned on the electric signal transmission path where the power supply control circuit is positioned, and when the electric signal transmission path is conducted, the switch detection circuit generates a corresponding electric signal; the micro control circuit controls the time delay conduction of the MOS tube circuit according to the electric signal generated by the switch detection circuit, so that the electric signal generated by the switch detection circuit passes through the MOS tube circuit after the time delay arc extinguishing period and then passes through the uplink switch/the downlink switch which is triggered and started to control the output end of the connected load driving device to move, and therefore the load carrier is driven to carry out uplink motion or downlink motion of corresponding postures.
Further, the switch detection circuit comprises a resistor RS1 matched with the uplink switch and a resistor RS2 matched with the downlink switch, and the MOS tube circuit comprises an MOS tube Q7 matched with the uplink switch and an MOS tube Q6 matched with the downlink switch; the micro control circuit comprises a first input pin and a second input pin; one end of the resistor RS1 is grounded, and the other end of the resistor RS1 is respectively connected with a first input pin of the micro-control circuit and the source/drain of the MOS transistor Q7; one end of the resistor RS2 is grounded, the other end of the resistor RS2 is respectively connected with a second input pin of the micro-control circuit and the source/drain electrode of the MOS tube Q6, an electric signal generated by trigger operation is detected through the resistor RS1 or the resistor RS2, and a trigger signal is sent to the micro-control circuit.
Further, the micro control circuit includes an output pin, and the output pin of the micro control circuit is connected to the gates of the MOS transistor Q7 and the MOS transistor Q6, respectively, and is configured to delay the set arc extinguishing time and then send a signal to the gate, so as to turn on the corresponding MOS transistor Q7 or the corresponding MOS transistor Q6.
Referring to fig. 7 to 8, a method for performing a switch circuit protection using a switch circuit protection program according to an embodiment of the present application includes the following steps:
step S1: the micro control circuit receives the electric signal generated by the detection switch circuit, judges whether the electric signal is the electric signal generated when the switch group starts to operate and trigger, if so, the step S2 is carried out, otherwise, the generated electric signal is received again.
Step S2: and comparing whether the duration time of the electric signal is higher than the false touch detection time or not according to the preset false touch detection time, if so, entering the step S3, and if not, returning to the step S1 to re-receive the generated electric signal.
Step S3: according to the preset arc extinguishing time and the continuous electric signal, the MOS tube circuit is controlled to be conducted after the electric signal continues the arc extinguishing time, and the step S4 is proceeded.
Step S4: and continuously receiving the electric signal generated by the detection switch circuit, judging whether the electric signal exists, if so, entering the step S5, and if not, returning to the step S1 to receive the electric signal again.
Step S5: and sequentially judging whether loop current exists on the load driving device circuit connected with each switch group in the switch circuit, if so, entering the step S6, and otherwise, returning to the step S4.
Assuming that the load driving device includes a first driving device, a second driving device, and a third driving device, step S5 further includes step S51 of detecting whether the first driving device has a loop current, if yes, step S6 is performed, and if no, step S52 is performed; step S52, detecting whether the second driving device has a loop current, if yes, going to step S6, if no, going to step S53; in step S53, it is checked whether the second driving device has a loop current, if yes, the process proceeds to step S6, and if no, the process proceeds to step S4.
Step S6: the control MOS transistor circuit is turned off when there is a loop current or when no electric signal is detected, and the process proceeds to step S7.
Step S7: and continuously receiving the electric signal generated by the detection switch circuit, continuously judging whether the electric signal is generated, if so, returning to the step S1, and otherwise, returning to the step S6.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (13)
1. A multifunctional bed comprises a bed body containing a plurality of bed components, and is characterized by further comprising: the bed comprises a switch control device for receiving the posture adjustment of various bed components of a bed body controlled by a user, various load driving devices arranged on the bed body and used for controlling the posture change of the bed components, a power supply control device used for controlling electric signal transmission and a power supply device used for supplying power, wherein an electric signal transmission passage is formed among the switch control device, the power supply device and the various load driving devices, the power supply is supplied to the load driving devices, and the adaptive load driving devices are controlled to trigger the corresponding posture adjustment of the bed components;
the switch control device comprises at least one input end and a plurality of output ends, the input end is connected with the power supply control device, each output end of the switch control device is at least connected with one adaptive load driving device, the switch control device is used for being adaptive to the load driving devices and is arranged for receiving a switch group corresponding to user starting operation, and the corresponding load driving devices are controlled to move in a preset direction through the switch group; the number of the load driving devices is matched with the number of the switch groups;
the power supply control device comprises a micro control unit, an MOS tube unit and a switch detection unit for detecting the switch group started by the operation of a user, wherein the micro control unit is respectively connected with the MOS tube unit and the switch detection unit; wherein, the micro control unit presets arc extinguishing time;
the power supply device is connected with the power supply control device, the power supply control device is connected with the input end of the switch control device, the output end of the switch control device is respectively connected with the adaptive load driving devices, the input end of the switch control device is connected with all the switch groups in parallel, and each switch group is connected with the adaptive load driving device;
when the switch group is not triggered to start by a user, all the electric signal transmission paths are in a disconnected state, and after the switch group is started by the user, the MOS tube unit is controlled to be conducted after delaying the arc extinguishing time period according to the arc extinguishing time preset by the micro control unit, so that the corresponding electric signal transmission paths are conducted, the load driving device corresponding to the switch group is operated after the switch group is triggered to start at the interval arc extinguishing time period, and the bed assembly of the bed main body is driven to adjust the corresponding posture.
2. The multifunctional bed as claimed in claim 1, wherein said switch sets are switch pairs, each of said switch pairs comprises an up switch and a down switch, and one of said up switch and said down switch is triggered to turn on said electrical signal transmission path of said switch control device;
the switch detection unit is positioned on the electric signal transmission path where the power supply control device is positioned, and when the electric signal transmission path is conducted, the switch detection unit generates a corresponding electric signal; the micro control unit controls the MOS tube unit to be conducted in a delayed mode according to the electric signals generated by the switch detection unit, so that the electric signals generated by the switch detection unit pass through the MOS tube unit after the arc extinguishing time period is delayed, and then pass through the uplink switch/the downlink switch which is triggered and started to control the output end of the connected load driving device to move, and therefore the bed assembly is driven to move upwards or downwards in a corresponding posture.
3. The multi-function bed of claim 2, wherein said switch detection unit comprises a resistance RS1 adapting said up switch and a resistance RS2 adapting said down switch,
the MOS tube unit comprises an MOS tube Q7 matched with the uplink switch and an MOS tube Q6 matched with the downlink switch; the micro control unit comprises a first input pin and a second input pin;
one end of the resistor RS1 is grounded, and the other end of the resistor RS1 is respectively connected with a first input pin of the micro control unit and the source/drain of the MOS transistor Q7; one end of the resistor RS2 is grounded, the other end of the resistor RS2 is connected with a second input pin of the micro control unit and the source/drain electrode of the MOS tube Q6, an electric signal generated by trigger operation is detected through the resistor RS1 or the resistor RS2, and a trigger signal is sent to the micro control unit.
4. The multifunctional bed of claim 2 or 3, wherein the micro control unit comprises an output pin, and the output pin of the micro control unit is connected to the gates of the MOS transistor Q7 and the MOS transistor Q6, respectively, for delaying a set arc extinguishing time and then sending a signal to the gate to turn on the corresponding MOS transistor Q7 or the MOS transistor Q6.
5. The multifunctional bed as claimed in claim 1, wherein the arc extinguishing time is set to 150 and 300 milliseconds.
6. The multifunctional bed of claim 1, wherein the micro control unit further comprises a false touch detection time, and the comparison of the false touch detection time determines whether the duration time of the electrical signal generated by the switch detection unit is longer than the false touch detection time, if so, the MOS transistor unit is controlled to be turned on in a delayed manner according to the generated electrical signal, and if not, the electrical signal generated by the switch detection unit is continuously received.
7. The multifunctional bed of claim 6, wherein said micro control unit comprises a ROM program memory, a time clock, by which an arc extinguishing time and a false touch detection time are preset,
the ROM program memory is preset with a switch circuit protection program, the switch circuit protection program controls the conduction delay arc extinguishing time period of the MOS tube unit, and the duration time of the electric signal generated by the switch detection unit is compared with the false touch detection time, so that the electric signal generated by the switch detection unit due to false touch is prevented.
8. The multifunctional bed as claimed in claim 1, wherein a plurality of light emitting diodes connected in series and in parallel are provided in the switch control device, and are electrically connected to the power supply through the power supply control device, so that when the switch control device is electrically connected to the power supply control device, the power supply continuously supplies power to the light emitting diodes.
9. The multifunctional bed of claim 1, wherein said load driving means comprises a first driving means, a second driving means, and a third driving means,
the switch group comprises a first switch pair, a second switch pair and a third switch pair; the bed assembly of the bed body comprises a leg unit, a head unit and a bed frame unit;
the first switch pair is connected with the first driving device and used for controlling the bed body to adjust the posture of the leg unit so as to enable the bed body to move upwards/downwards;
the second switch pair is connected with the second driving device and used for controlling the bed body to adjust the posture of the head unit so that the head unit can move upwards/downwards;
the third switch pair is connected to the third driving device, and is used for controlling the bed body to perform posture adjustment of the bed frame unit so as to enable the bed body to perform upward movement/downward movement.
10. A multi-drive switch protection circuit comprises a power supply control circuit and a switch control circuit; the power supply control circuit is connected with a power supply device, and the switch control circuit is connected with various load driving devices; the switch control circuit, the power supply control device, the power supply device and the plurality of load driving devices form an electric signal transmission channel to supply power to the load driving devices and complete the adaptation of the load driving devices to trigger the load driving devices to drive corresponding load carriers to move;
the switch control circuit is provided with a switch group corresponding to the receiving of user starting operation for adapting the load driving device, and controls the load driving device to move in a preset direction through the switch group; the number of the load driving devices is matched with the number of the switch groups;
the power supply control circuit comprises a micro control circuit, an MOS tube circuit and a detection switch circuit for detecting that the switch group is started by the operation of a user, wherein the micro control circuit is respectively connected with the MOS tube circuit and the detection switch circuit; the micro-control circuit is preset with arc extinguishing time;
the power supply control circuit is connected with the input end of the switch control circuit, the output end of the switch control circuit is respectively connected with the adaptive load driving devices, the input end of the switch control circuit is connected with all the switch groups in parallel, and each switch group is connected with the adaptive load driving device;
when the switch group is not triggered to start by a user, all the electric signal transmission paths are in a disconnected state, and after the switch group is started by the user, the MOS tube circuit is controlled to be switched on after delaying the arc extinguishing time period according to the arc extinguishing time preset by the micro control circuit, so that the corresponding electric signal transmission paths are switched on, and the load driving device corresponding to the switch group operates after the switch group is triggered to start and the arc extinguishing time period is separated, so as to drive the corresponding load carrier to perform corresponding posture adjustment.
11. The multi-driving switch protection circuit according to claim 10, wherein the switch groups are switch pairs, each of the switch pairs comprises an up switch and a down switch, and one of the up switch and the down switch is triggered to turn on the electrical signal transmission path of the switch control circuit;
the switch detection circuit is positioned on the electric signal transmission path where the power supply control circuit is positioned, and when the electric signal transmission path is conducted, the switch detection circuit generates a corresponding electric signal; the micro control circuit controls the time delay conduction of the MOS tube circuit according to the electric signal generated by the switch detection circuit, so that the electric signal generated by the switch detection circuit passes through the MOS tube circuit after the time delay arc extinguishing period and then passes through the uplink switch/the downlink switch which is triggered and started to control the output end of the connected load driving device to move, and therefore the load carrier is driven to carry out uplink motion or downlink motion of corresponding postures.
12. The multi-drive switch protection circuit of claim 11, wherein the switch detection circuit comprises a resistance RS1 that adapts the up switch and a resistance RS2 that adapts the down switch,
the MOS tube circuit comprises an MOS tube Q7 matched with the uplink switch and an MOS tube Q6 matched with the downlink switch; the micro control circuit comprises a first input pin and a second input pin;
one end of the resistor RS1 is grounded, and the other end of the resistor RS1 is respectively connected with a first input pin of the micro-control circuit and the source/drain of the MOS transistor Q7; one end of the resistor RS2 is grounded, the other end of the resistor RS2 is respectively connected with a second input pin of the micro-control circuit and the source/drain electrode of the MOS tube Q6, an electric signal generated by trigger operation is detected through the resistor RS1 or the resistor RS2, and a trigger signal is sent to the micro-control circuit.
13. The protection circuit of claim 11 or 12, wherein the micro-control circuit comprises an output pin, and the output pin of the micro-control circuit is connected to the gates of the MOS transistor Q7 and the MOS transistor Q6, respectively, for delaying a set arc extinguishing time and then sending a signal to the gate to turn on the corresponding MOS transistor Q7 or the corresponding MOS transistor Q6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/522,940 US20220347028A1 (en) | 2021-04-29 | 2021-11-10 | Multifunctional Bed, A Multi-drive Switch Protection Circuit and Its Control Device |
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| CN2021104761995 | 2021-04-29 | ||
| CN202110476199 | 2021-04-29 |
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Application publication date: 20210824 |