Multi-motor control circuit, multi-motor control system and dental equipment

Abstract

The invention relates to a multi-motor control circuit, a multi-motor control system and dental equipment. The multi-motor control circuit is used for controlling switching operation of multiple groups of motors, and comprises a main control unit used for identifying corresponding motors and outputting control signals of the motors; the motor driving unit is used for receiving the control signal and outputting a corresponding motor driving signal; the expansion unit is provided with a first input port, a second input port, a first relay group and a plurality of groups of output ports; and the first relay group switches contacts according to the control signal, so that the motor driving unit is in signal conduction with any motor. According to the invention, only one group of motor driving units is arranged, and the motor driving units are in signal conduction with any motor through the expansion units, so that the switching control of one group of motor driving units on a plurality of motors is realized, the traditional control mode that a plurality of motor driving units drive a plurality of motors is replaced, the circuit structure is simplified, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the field of dental medical equipment, and in particular to a multi-motor control circuit, a multi-motor control system and dental equipment. Background Art

[0002] With the development of society, dental medical methods are becoming more and more advanced. Dental handpieces are a commonly used oral medical device, which are used to drill, cut, grind, and polish patients' teeth. Conventional dental surgical operations, such as cleaning, tooth extraction, tooth preparation, polishing, and repair, usually require different dental handpieces to perform. Doctors may use dental handpieces with multiple speed ratios during the same operation. Only one motor will cause doctors to frequently replace the handpiece during the operation, which brings inconvenience to the operation. Therefore, it is necessary to set up multiple dental handpieces with separate motor control on one dental device.

[0003] Currently, dental handpieces on the market use independent motor drive units to drive corresponding motors to achieve the operation of a single handpiece. Multiple dental handpieces often require multiple motor drive units to control the motors of multiple dental handpieces separately. This setting will make the overall drive box very large, which is not conducive to lightweight design, and will also make the cost of the overall drive box very high. Summary of the invention

[0004] Based on this, the object of the present invention is to provide a multi-motor control circuit, which only has one group of motor drive units, and connects the motor drive units with any motor signal through an expansion unit, so as to realize switching control of multiple motors by one group of motor drive units, so as to replace the traditional control method of multiple motor drive units driving multiple motors, simplify the circuit structure and save costs.

[0005] Another object of the present invention is to provide a multi-motor control system. By providing multiple groups of dental handpieces that are individually controlled by motors, multiple handpieces can be flexibly used in the same operation, thereby reducing the waiting time caused by changing handpieces during the operation.

[0006] Another object of the present invention is to provide a dental device with a multi-motor control system that can meet most application scenarios in dental treatment and has strong applicability.

[0007] A multi-motor control circuit is used to control the switching operation of multiple groups of motors, comprising:

[0008] A main control unit, used to identify the corresponding motor and output a control signal of the motor;

[0009] A motor driving unit, connected to the main control unit, receives the control signal and outputs a corresponding motor driving signal;

[0010] The expansion unit is provided with a first input port, a second input port, a first relay group, and a plurality of output ports; the first input port is used to receive the control signal; the second input port is connected to the motor drive unit and is used to receive the motor drive signal;

[0011] The input end of the first relay group is connected to the second input port, and the output end thereof is respectively connected to several of the output ports; the output ports are at least three groups, and each of the output ports is connected to one of the motors; the first relay group switches contacts according to the control signal to make the motor drive unit conductive with any of the motor signals.

[0012] Furthermore, the second input port is provided with a three-phase input interface, and the output port is provided with a three-phase output interface; the first relay group includes a plurality of identical or different relays; the first relay group is provided with at least three input contacts correspondingly connected to the three-phase input interface, and a plurality of output contacts switchably connected to three or more groups of the three-phase output interfaces.

[0013] Furthermore, the number of the output ports is three groups, and all are connected to the corresponding motors;

[0014] The first relay group includes a first three-pole double-throw relay and a second three-pole double-throw relay;

[0015] The input contacts of the first three-pole double-throw relay are respectively connected to the three-phase input interfaces; the output contacts of the first three-pole double-throw relay are connected to one group of the three-phase output interfaces, and the output contacts of the second three-pole double-throw relay are connected to the other two groups of the three-phase output interfaces.

[0016] Furthermore, the multi-motor control circuit further includes:

[0017] A lighting driving unit, used to receive the control signal and output a lighting driving signal; the lighting driving unit is provided with a lighting signal output port, and the second input port is further provided with a positive input interface and a negative input interface connected to the lighting signal output port; the three groups of output ports are further provided with a positive output interface and a negative output interface, respectively, connected to the corresponding motor;

[0018] The extension unit is also provided with a second relay group, which includes a first single-pole double-throw relay and a second single-pole double-throw relay arranged in series; the input contact of the first single-pole double-throw relay is connected to the positive input interface, and the first single-pole double-throw relay and the second single-pole double-throw relay switch the output contacts according to the control signal, so that the positive input interface is connected to one of the positive output interfaces; the negative input interface is connected to each of the negative output interfaces, so that the lighting drive unit is conductively connected to one of the motors.

[0019] Furthermore, the multi-motor control circuit further includes:

[0020] The power conversion unit is used to convert alternating current into direct current as an input voltage for the multi-motor control circuit.

[0021] A multi-motor control system, comprising:

[0022] A water-gas component, a water-gas control component, a drive control component, and a plurality of groups of dental handpieces with independent motors; the drive control component is provided with the multi-motor control circuit;

[0023] The water and gas components are connected to the multiple groups of dental handpieces, and the water and gas supply for the multiple groups of dental handpieces is switched by the water and gas control components;

[0024] The multi-motor control circuit is connected to a plurality of motors and performs switching control on the plurality of motors.

[0025] Furthermore, the water-gas component is provided with an air flow path, and the air flow path is provided with a plurality of parallel handle positions for correspondingly placing a plurality of groups of the dental handpieces;

[0026] The water and gas control component includes a plurality of air pressure switches arranged on the air flow path, and the air pressure switch is connected to the handle position; each handle position is provided with a hanger valve to open or close the air flow path between the handle position and the air pressure switch; when the dental handpiece leaves the handle position, the hanger valve opens, and the air flow path between the corresponding handle position and the air pressure switch is connected, and the air pressure switch detects the air pressure signal and converts it into a level signal for identifying the dental handpiece used.

[0027] Furthermore, the water-gas component further comprises a water flow path; the end of the water flow path is divided into a plurality of water flow branches, and the end of the gas flow path is divided into a plurality of air flow branches; one of the water flow branches and one of the air flow branches are simultaneously connected to a water-gas pipe of the motor;

[0028] The water vapor control component also includes a plurality of solenoid valves and water vapor switches arranged on the water flow branch and the air flow branch; the solenoid valves are connected to the water vapor switches one by one to control the opening or closing of the corresponding water vapor switches to control the conduction and cutoff of the corresponding water flow branch and the air flow branch.

[0029] Furthermore, the multi-motor control system further includes:

[0030] A sterile water component, used for providing sterile water to the dental handpiece;

[0031] The drive control component is also provided with a stepper motor drive unit for receiving a control signal and responding to drive the sterile water component to work.

[0032] A dental device comprises: the multi-motor control system of the present invention.

[0033] The beneficial effects of the present invention are:

[0034] (1) Only one set of motor drive units is provided, and the motor drive units are connected to any motor signal through the expansion unit, so as to realize the switching control of multiple motors by one set of motor drive units, thereby replacing the traditional control method of multiple motor drive units driving multiple motors, simplifying the circuit structure and saving costs;

[0035] (2) By setting up multiple groups of dental handpieces with individually controlled motors, multiple handpieces can be flexibly used in the same operation, reducing the waiting time caused by changing handpieces during the operation;

[0036] (3) By setting a water and gas control component in combination with a drive box and a control box, the currently used dental handpiece can be automatically identified and the work mode set in advance can be switched to drive the corresponding dental handpiece to work;

[0037] (4) An air pressure sensor is provided in the drive box to detect the state of the water-gas dual-control foot pedal of the dental instrument, so that the original water-gas dual-control foot pedal of the dental instrument can be used to control the dental instrument without adding an additional foot pedal, thereby simplifying the installation of the multi-motor dental handpiece device;

[0038] (5) By providing a first dental handpiece with an internal water channel, a second dental handpiece with a root canal file, and a third dental handpiece with an external water channel, most application scenarios in dental treatment can be met, and the applicability is strong.

[0039] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a multi-motor control circuit provided in an embodiment of the present application;

[0041] Figure 2 A circuit diagram of an expansion unit provided in an embodiment of the present application;

[0042] Figure 3 A schematic diagram of a multi-motor control system provided in an embodiment of the present application;

[0043] Figure 4 Schematic diagram of the water vapor component provided in the embodiment of the present application Figure 1 ;

[0044] Figure 5 Schematic diagram of the water vapor component provided in the embodiment of the present application Figure 2 .

[0045] In the figure: 10-dental handpiece; 11-first dental handpiece; 12-second dental handpiece; 13-third dental handpiece; 110-water and air pipe; 111-first water and air pipe; 112-second water and air pipe; 113-third water and air pipe; 21-water flow path; 211-total water flow input port; 212-water flow branch; 2121-first water flow branch; 2122-second water flow branch; 2123-third water flow branch; 213-water flow rate adjustment Valve; 22-gas flow path; 221-total gas input port; 222-air flow branch; 2221-first air flow branch; 2222-second air flow branch; 2223-third air flow branch; 223-first diverter valve; 224-second diverter valve; 225-rack; 226-handle position; 227-rack valve; 2271-first rack valve; 2272-second rack valve; 2273-third rack valve; 228-air flow regulating valve; 31-water and gas dual-control foot pedal; 32-air pressure switch; 321-first air pressure switch; 322-second air pressure switch; 323-third air pressure switch; 33-solenoid valve; 331-first solenoid valve; 332-second solenoid valve; 333-third solenoid valve; 34-water and gas switch; 341-first water and gas switch; 342-second water and gas switch; 343-third water and gas switch; 40-drive box; 41-input interface; 42-output interface; 4 3-motor drive unit; 44-lighting drive unit; 45-stepping motor drive unit; 46-air pressure sensor; 50-control box; 51-main control unit; 60-sterile water assembly; 70-motor extension box; 71-extension unit; K11-first three-pole double-throw relay; K12-second three-pole double-throw relay; K21-first single-pole double-throw relay; K22-second single-pole double-throw relay; 80-power box; 81-power conversion unit. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "vertical direction", "up", "down", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Conventional dental surgical operations, such as cleaning, tooth extraction, tooth preparation, polishing, and restoration, usually require different dental handpieces. Doctors may use dental handpieces with multiple speed ratios during the same operation. Only one motor will cause doctors to frequently replace the handpiece during the operation, which brings inconvenience to the operation. Therefore, it is necessary to set up multiple dental handpieces with separate motor controls on one dental device.

[0050] Currently, dental handpieces on the market use independent motor drive units to drive corresponding motors to achieve the operation of a single handpiece. Multiple dental handpieces often require multiple motor drive units to control the motors of multiple dental handpieces separately. This setting will make the overall drive box very large, which is not conducive to lightweight design, and will also make the cost of the overall drive box very high.

[0051] Based on this, an embodiment of the present application provides a multi-motor control circuit, which only has one set of motor drive units. The motor drive units are connected to any motor signal through an expansion unit to achieve switching control of multiple motors by one set of motor drive units.

[0052] See also Figure 1and Figure 2 The embodiment of the present application provides a multi-motor control circuit for controlling the switching operation of multiple groups of motors to control the time-sharing operation of multiple groups of dental mobile phones. The multi-motor control circuit includes: a main control unit 51, a motor drive unit 43 and an expansion unit 71. The main control unit 51 is used to identify the corresponding motor and output the control signal of the motor; the motor drive unit 43 receives the control signal and outputs the corresponding motor drive signal. The input end of the expansion unit 71 is used to receive the control signal and the motor drive signal at the same time. The output end of the expansion unit 71 is connected to multiple motors in parallel. The motor drive unit 43 is switched to connect to any motor through the expansion unit 71, so as to control the operation of the motor.

[0053] It should be noted that the main control unit 51 is provided with different working modes for different motors, and jumps to different working modes by receiving the level signal when the dental handpiece is picked up, and outputs the control signal of the corresponding motor.

[0054] Specifically, the main control unit 51 identifies the corresponding motor according to the level signal it receives and outputs the control signal of the corresponding motor. The input end of the motor drive unit 43 is connected to the main control unit 51, receives the control signal and outputs the motor drive signal of the corresponding motor; the output end of the motor drive unit 43 outputs the three-phase motor drive signal. The expansion unit 71 is provided with a first input port J1, a second input port J2, a first relay group, and several groups of output ports; the first input port J1 is used to receive the control signal sent by the main control unit 51; the second input port J2 is connected to the motor drive unit 43, and is used to receive the motor drive signal of the corresponding motor. One end of the first relay group is connected to the second input port J2, and the other end is respectively connected to several output ports. There are at least three groups of output ports, and each output port is connected to a motor. The first relay group switches the connection contacts according to the control signal to make the motor drive unit 43 conductive with any motor signal to control the switching operation of multiple motors.

[0055] The multi-motor control circuit provided in the embodiment of the present application only has one group of motor drive units. The motor drive units are connected to any motor signal through an expansion unit. One group of motor drive units controls the switching of multiple motors. Compared with the traditional setting method of controlling one motor with one group of motor drive units, the embodiment of the present application saves costs to a great extent and realizes a lightweight design of the drive box.

[0056] Furthermore, the second input port J2 is provided with a three-phase input interface, which are respectively a U0 interface, a V0 interface and a W0 interface; the output port is provided with a three-phase output interface connected to the motor. It should be noted that the first relay group includes a number of identical or different relays, and is provided with at least three input contacts correspondingly connected to the three-phase input interface to connect the U0 interface, the V0 interface and the W0 interface; the first relay group is also provided with a number of output contacts that can be switched to three or more groups of the three-phase output interfaces. The three input contacts can be set on the same relay, or on different relays, which can be switched to different output contacts to form at least three groups of three-phase output interfaces, and switched to different motors via control signals.

[0057] Specifically, in the embodiment of the present application, three motors are taken as an example to explain the multi-motor control circuit.

[0058] In this case, this connection mode of the first relay group can be realized by a variety of settings, such as: two three-pole double-throw relays arranged in series; it may also be six single-pole double-throw relays, two of which are connected in series to any three-phase output interface; it can also be 3 double-pole double-throw relays, or a combination of multiple identical or different relays, the purpose of which is to realize that its input end is connected to a group of three-phase input interfaces, and its output end is connected to multiple groups of three-phase output interfaces, but it is not limited to this.

[0059] Preferably, in an embodiment of the present application, the first relay group includes two three-pole double-throw relays connected in series, which are defined as a first three-pole double-throw relay K11 and a second three-pole double-throw relay K12. The three input contacts of one of the three-pole double-throw relays are respectively connected to the U0 interface, the V0 interface and the W0 interface. The number of output ports is three groups, and each is provided with a three-phase output interface connected to the corresponding motor. It can be understood that under this setting mode, the number of relay switches is small, cost is saved, and it is also beneficial to the circuit layout and improves the stability of the operation of the first relay group.

[0060] Specifically, the first three-pole double-throw relay K11 is provided with three input contacts A, B, and C, and six corresponding output contacts A1 / A2, B1 / B2, and C1 / C2. The second three-pole double-throw switch is provided with three input contacts D, E, and F, and six corresponding output contacts D1 / D2, E1 / E2, and F1 / F2; the three input contacts D, E, and F are connected to A2, B2, and C2 respectively, so that the output contacts of the first three-pole double-throw relay are connected to one group of three-phase output interfaces, and the output contacts of the second three-pole double-throw relay are connected to the other two groups of three-phase output interfaces.

[0061] Specifically, a plurality of motors are defined as a first motor, a second motor, and a third motor, respectively. Three groups of output ports are defined as a first output port J3, a second output port J4, and a third output port J5, respectively, which are connected to the first motor, the second motor, and the third motor, respectively. The first output port J3 is provided with a U1 interface, a V1 interface, and a W1 interface, and is connected to the first motor; the second output port J4 is provided with a U2 interface, a V2 interface, and a W2 interface, and is connected to the second motor; the third output port J5 is provided with a U3 interface, a V3 interface, and a W3 interface, and is connected to the third motor, and is used to transmit the three-phase signal output by the motor drive unit 43 to the corresponding motor.

[0062] Furthermore, in some embodiments, the multi-motor control circuit is further provided with a lighting drive unit 44 for receiving the control signal and outputting a lighting drive signal. The lighting drive unit 44 is provided with a lighting signal output port, and the second input port J2 is further provided with a positive input interface LED+ and a negative input interface LED- connected to the lighting signal output port; the output port is further provided with a positive output interface and a negative output interface, which are connected to the corresponding motor.

[0063] Furthermore, the extension unit 71 is also provided with a second relay group, which includes a first single-pole double-throw relay K21 and a second single-pole double-throw relay K22 arranged in series; the input contact M of the first single-pole double-throw relay K21 is connected to the positive input interface, and the first single-pole double-throw relay K21 and the second single-pole double-throw relay K22 switch the output contacts according to the control signal, so that the positive input interface LED+ is connected to one of the positive output interfaces; the negative input interface LED- is connected to each negative output interface, so that the lighting drive unit 44 is conductively connected to one of the motors.

[0064] Specifically, the first output port J3 is provided with a first positive output interface L+1 and a first negative output interface L-1 connected to the first motor, and is connected to the first motor; the second output port J4 is provided with a second positive output interface L+2 and a second negative output interface L-2 connected to the second motor, and is connected to the second motor; the third output port J5 is provided with a third positive output interface L+3 and a third negative output interface L-3 connected to the third motor, and is connected to the third motor.

[0065] Furthermore, the first input port J1 is provided with two control signal interfaces CT1 and CT2, which control the switching contacts of the first relay group by judging the states of the control signals CT1 and CT2, so that the motor drive unit 43 is connected to the corresponding motor to control the operation of the corresponding motor.

[0066] According to the truth table, when the control signal CT1 is at a low level, no matter what the state of CT2 is, the first motor is controlled to work. Specifically, at this time, the contact A is connected to A1, so that UO is connected to U1; the contact B is connected to B1, so that V0 is connected to V1; the contact C is connected to C1, so that W0 is connected to W1, the contact M is connected to M1, the second input port J2 is connected to the first output port J3, and the motor drive unit 43 and the lighting drive unit 44 are both connected to the first motor.

[0067] When the control signal CT1 is at a high level and the control signal CT2 is at a low level, the second motor is controlled to work. The second input port J2 is connected to the second output port J4, and the motor drive unit 43 and the lighting drive unit 44 are connected to the second motor. When the control signals CT1 and CT2 are both at a high level, the third motor is controlled to work, the second input port J2 is connected to the third output port J5, and the motor drive unit 43 and the lighting drive unit 44 are connected to the third motor. No further details are given here.

[0068] See also Figure 1-5 The embodiment of the present application also provides a multi-motor control system, including: multiple groups of dental handpieces 10 with independent motors, a water-gas component, a water-gas control component and a drive control component provided with a multi-motor control circuit, wherein the water-gas component is used to supply water and gas to each group of dental handpieces 10, and the drive control component is used to receive the detection signal of the water-gas control component and issue a control instruction to control whether the water and gas of a single dental handpiece 10 are conductive.

[0069] Further, the drive control assembly includes a power box 80, a control box 50, a drive box 40 and a motor expansion box 70. The power box 80 is provided with a power conversion unit for converting AC power into DC power as an input voltage of the multi-motor system.

[0070] Specifically, the control box 50 is provided with a main control unit 51, and a separate working mode is set for each motor, which is used to identify the use signal of the dental mobile phone and jump to the working mode of the corresponding motor. There is no need to manually adjust the mode or change the type of mobile phone during use, which reduces the waiting time for surgery and the risk of cross infection.

[0071] Specifically, the parameters of the interactive interface configuration of the control box 50 are exchanged with the driver box 40 through the RS232 hardware interface via the serial communication method, so as to achieve the purpose of sending the interface setting parameters and uploading the operating status of the driver box 40.

[0072] Specifically, the drive box 40 is provided with a motor drive unit 43, and the motor expansion box 70 is provided with an expansion unit 71. The motor drive unit 43 outputs a three-phase signal of the corresponding motor according to the working mode of the corresponding motor issued by the control box 50, and is connected to the corresponding motor through the expansion unit 71 to control the operation of the corresponding motor.

[0073] Specifically, the water-gas component includes a water flow path 21 and an air flow path 22; the end of the water flow path 21 is divided into a plurality of water flow branches 212, and the water flow branches 212 are respectively connected to the water and gas pipes 110 of the motor in a one-to-one manner; the end of the air flow path 22 is divided into a plurality of air flow branches 222, and the air flow branches 222 are respectively connected to the water and gas pipes 110 of the motor in a one-to-one manner, that is, a water flow branch 212 and an air flow branch 222 are simultaneously connected to a water and gas pipe 110 of the motor.

[0074] Specifically, the water-gas control assembly includes a plurality of air pressure switches 32 and a plurality of electromagnetic valves 33 disposed on the air path 22 corresponding to the dental handpieces 10, and a water-gas switch 34 disposed on the water flow branch 212 and the air flow branch 222; the electromagnetic valves 33 are connected to the water-gas switches 34 in a one-to-one correspondence to control the conduction and cutoff of the corresponding water flow branch 212 and the air flow branch 222. The air pressure switch 32, the electromagnetic valve 33 and the motor are all connected to the drive box 40 for signal.

[0075] Furthermore, the drive box 40 is provided with a plurality of input interfaces 41 and a plurality of output interfaces 42, the air pressure switch 32 is correspondingly connected to the input interface 41, and the solenoid valve 33 is correspondingly connected to the output interface 42. When any dental handpiece 10 is in use, the corresponding air pressure switch 32 detects the air pressure signal and outputs the level signal, the input interface 41 receives the level signal, and the drive box 40 uploads the level signal to the control box 50, and the control box 50 identifies the dental handpiece in use according to the triggered level signal and automatically switches to the working mode of the dental handpiece. At the same time, the drive box 40 outputs the corresponding working signal to the corresponding solenoid valve 33 and the motor according to the working mode determined by the control box 50, so as to control whether the corresponding water circuit and air circuit are conductive through the solenoid valve 33, and control the motor to operate with the set parameters.

[0076] Specifically, when the corresponding dental handpiece 10 needs to provide water and gas, the solenoid valve 33 is opened, and the air flow is conducted to the water and gas switch 34 to open the water and gas switch 34. At this time, the air flow branch 222 and the water flow branch 212 are conducted to supply water and gas to the dental handpiece 10. When the corresponding dental handpiece 10 does not need to provide water and gas, the solenoid valve 33 is closed, and the water and gas switch 34 is closed, and the air flow branch 222 and the water flow branch 212 are cut off.

[0077] It should be noted that in the embodiment of the present application, the water-gas switch 34 is a diaphragm valve, which controls the opening or closing of the valve by air pressure. One control channel can control multiple valves at the same time. In the embodiment of the present application, one control channel controls two valves, that is, it simultaneously controls the conduction and cutoff of the water flow branch 212 and the air flow branch 222 connected to the same motor.

[0078] It can be understood that, as a preferred embodiment, the water flow branch 212, the air flow branch 222, the air pressure switch 32, the solenoid valve 33, and the water-gas switch 34 are consistent with the number of dental handpieces 10, and correspond one to one, so as to realize the separate control of the water, gas and motor of a single dental handpiece 10, so that multiple dental handpieces 10 can be switched and used at will.

[0079] Furthermore, in some embodiments, the initial end of the water flow path 21 is provided with a total water path input port 211 for connecting to an external water path; the initial end of the gas flow path 22 is provided with a total gas path input port 221 for connecting to an external gas path. The water and gas control component also includes a water and gas dual-control pedal 31, which is provided at the input end of the water flow path 21 and the gas flow path 22, and the water and gas dual-control pedal 31 simultaneously controls the external airflow and external water flow input into the multi-motor control system.

[0080] It is understandable that the drive box 40 is provided with a pedal interface for connecting to the signal of the water-gas dual-control pedal 31, receiving the pedal signal of the water-gas dual-control pedal 31, and determining whether water and gas are introduced.

[0081] Furthermore, in some embodiments, the driving box 40 is further provided with an air pressure sensor 46 for monitoring whether water flow and air flow are introduced, and for judging the state of the water-gas dual-control foot pedal 31. Specifically, the air path 22 is further provided with a second diverter valve 224, one of the output ends of the second diverter valve 224 is connected to the air pressure sensor 46, and the air pressure sensor 46 is used to detect whether the input end of the air path 22 is connected, and to judge whether the water-gas dual-control foot pedal 31 is stepped on. An air flow regulating valve 228 is provided between the other output end of the second diverter valve 224 and the input ends of the plurality of air flow branches 222, for regulating the air flow entering the air flow branches 222.

[0082] Furthermore, in some embodiments, the gas flow path 22 is also provided with a first diverter valve 223 and a bracket 225, and the first diverter valve 223 is connected to the output end of the gas circuit of the water and gas dual-control foot pedal 31; one output end of the first diverter valve 223 is connected to the bracket 225, and the other output end is connected to the second diverter valve 224, so that part of the airflow is transmitted to the water and gas pipe of the motor through the first diverter valve 223, and the other part is transmitted to the bracket 225 for identifying the use signal of the dental mobile phone 10.

[0083] Furthermore, the rack 225 is provided with a plurality of handle positions 226 for correspondingly placing the dental handpieces 10, and they are respectively connected to the air pressure switches 32; each handle position 226 is respectively provided with a rack valve 227 to open or close the air flow path between the handle position 226 and the air pressure switch 32. When one of the dental handpieces 10 is picked up, the rack valve 227 corresponding to the handle position 226 is opened, and the air pressure switch 32 detects the air pressure signal, and converts it into a level signal and transmits it to the driving box 40. The driving box 40 uploads the level signal to the control box 50, and the control box 50 receives the level signal, identifies the corresponding dental handpiece, and jumps to the corresponding working mode and sends it to the driving box 40, and the driving box 40 responds and controls the corresponding motor and solenoid valve 33 to work.

[0084] Furthermore, in some embodiments, the water flow path 21 is also provided with a water flow regulating valve 213 , which is disposed between the water and gas dual-control foot pedal 31 and the water flow branch 212 , and is used to regulate the water flow entering the water flow branch 212 .

[0085] Furthermore, in some embodiments, the dental handpiece 10 is also provided with a lighting module, and correspondingly, the driving box 40 is provided with a lighting driving unit 44. When the dental handpiece is replaced, the corresponding motor working mode is switched synchronously, and the lighting driving unit 44 is also switched to connect with the corresponding motor through the expansion unit 71.

[0086] Further, in some embodiments, the dental handpiece is equipped with an external water channel for providing sterile water for aseptic surgery. In this setting mode, the multi-motor control system is also provided with a sterile water component 60 for supplying sterile water, and the drive box 40 is correspondingly provided with a pump signal interface connected to the sterile water component 60, and a stepper motor drive unit 45 for driving the sterile water component 60. When the external water channel dental handpiece is taken, the control box 50 jumps to the corresponding working mode, the motor drive unit 43 is connected to the external water channel dental handpiece through the expansion unit 71, and the stepper motor drive unit 45 works to control the sterile water component 60 to supply sterile water to the external water channel dental handpiece.

[0087] Combine the following Figure 3-5 The working principle of the water vapor control component is explained in the example of

[0088] Specifically, the plurality of dental handpieces are a first dental handpiece 11 provided with a first motor, a second dental handpiece 12 provided with a second motor, and a third dental handpiece 13 provided with a third motor. The end of the water flow path 21 is divided into a first water flow branch 2121, a second water flow branch 2122 and a third water flow branch 2123; the end of the gas flow path 22 is divided into a first air flow branch 2221, a second air flow branch 2222 and a third air flow branch 2223, wherein the first water flow branch 2121 and the first air flow branch 2221 are connected to the first water and gas pipe 111, and the first water flow branch 2121 and the first air flow branch 2221 are provided with a first water and gas switch 341; the second water flow branch 2122 and the second air flow branch 2222 are connected to the second water and gas pipe 112; the second water flow branch 2122 and the second air flow branch 2222 are provided with a second water and gas switch 342; the third water flow branch 2123 and the third air flow branch 2223 are connected to the third water and gas pipe 113, and the third water flow branch 2123 and the third air flow branch 2223 are provided with a third water and gas switch 343. The first water-air pipe 111 , the second water-air pipe 112 and the third water-air pipe 113 are respectively connected to the first dental handpiece 11 , the second dental handpiece 12 and the third dental handpiece 13 for supplying water and air to the corresponding dental handpieces.

[0089] The rack 225 is correspondingly provided with a first handle position for placing the first dental handpiece 11, a second handle position for placing the second dental handpiece 12, and a third handle position for placing the third dental handpiece 13. The three handle positions 226 are respectively provided with a first rack valve 2271, a second rack valve 2272, and a third rack valve 2273. A plurality of air pressure switches 32 are respectively defined as a first air pressure switch 321, a second air pressure switch 322, and a third air pressure switch 323. The first rack valve 2271 is connected to the first air pressure switch 321, the second rack valve 2272 is connected to the second air pressure switch 322, and the third rack valve 2273 is connected to the third air pressure switch 323. A plurality of solenoid valves are respectively defined as a first solenoid valve 331, a second solenoid valve 332, and a third solenoid valve 333. The first solenoid valve 331 is connected to the first water-gas switch 341, the second solenoid valve 332 is connected to the second water-gas switch 342, and the third solenoid valve 333 is connected to the third water-gas switch 343.

[0090] In the working state, the water and gas dual-control pedal 31 is stepped on, and the external air flow and the external water flow enter the air path 22 and the water path 21 respectively. Part of the air flow is diverted to the hanger 225 through the first diverter valve 223, and the other part is diverted to the second diverter valve 224. After passing through the second diverter valve 224, part of the air flow flows to the air pressure sensor 46, and the air pressure sensor 46 detects the air flow signal and determines that the water and gas dual-control pedal 31 is stepped on; the other part of the air flow is adjusted by the air flow regulating valve 228 and flows to the three air flow branches respectively.

[0091] As an example, during the operation, the first dental handpiece 11 is removed, the first bracket valve 2271 is opened, and the air flows to the first air pressure switch 321. The first air pressure switch 321 detects the air pressure signal and converts it into a level signal and transmits it to the drive box 40. The drive box 40 receives the level signal and uploads the signal to the control box 50. The control box 50 identifies that the first dental handpiece 11 is currently used according to the level signal, and automatically switches to the working mode of the first dental handpiece 11. The working mode of the first dental handpiece 11 is defined as the first working mode. The drive box 40 determines whether water and gas need to be provided according to the first working mode. If necessary, the first solenoid valve 331 is controlled to open, and the corresponding air path flows to the first water-gas switch 341, so that the first water-gas switch 341 is opened, the first air flow branch 2221 and the first water flow branch 2121 are connected, and the water flow and air flow enter the first water-gas pipe 111 to supply water and gas to the corresponding dental handpiece. At the same time, the extension unit 71 connects the motor driving unit 43 and the lighting driving unit 44 to the first motor, driving the first motor to operate in the first working mode.

[0092] The embodiment of the present application also provides a dental device, including a multi-motor control system, to meet most application scenarios in dental treatment.

[0093] Further, the dental handpiece can be selected from one or more of a first dental handpiece used for general tooth preparation and restoration, a second dental handpiece used for root canal treatment, and a third dental handpiece used for aseptic surgery.

[0094] Specifically, the first dental handpiece is provided with a first motor and a first handpiece body with an inner water channel, and under this arrangement, the water supply of the inner water channel can be self-supplied by a dental chair. As an example, the first dental handpiece is a first motor with an inner water channel handpiece having a speed ratio of 1:4.2.

[0095] Specifically, the second dental handpiece is provided with a second motor and a second handpiece body with an endodontic file. As an example, the second dental handpiece is a second motor with a reduction handpiece having a speed ratio of 6:1, and is used for endodontic treatment.

[0096] During root canal treatment, the root canal file is installed at the front end of the second mobile phone body, and different working modes and adaptation parameters can be configured. As an example, the embodiment of the present application integrates 5 root canal modes in the interactive interface, each of which can be set to continuous rotation or reciprocating rotation. In the continuous rotation mode, the current working speed and stop torque can be adjusted. After starting, the second motor runs at the set speed. When the torque applied to the root canal file is greater than the set value, the second motor can stop running or reverse running. If the set torque is the stop torque, the motor stops after reaching the set torque to prevent the file needle from breaking or deforming; if the set torque is the reverse torque, the motor starts to reverse at the same speed after reaching the set torque. Reversal can release the torque and withdraw the file needle from the root canal. The torque is monitored in real time during reversal. When the torque is reduced to half of the set value or less, the second motor resumes forward rotation. In the reciprocating rotation mode, the current working speed and reciprocating angle can be adjusted. The reciprocating angle can be set to the forward rotation angle and the reverse rotation angle respectively. After starting the second motor, the second motor reciprocates at the set speed and angle.

[0097] Specifically, the third dental handpiece is provided with a third motor and a third handpiece body with an external water channel, and the external water channel is used to provide sterile water. As an example, the third dental handpiece is a third motor with an external water channel dental handpiece with a speed ratio of 1:5, which is used for aseptic surgery such as tooth extraction.

[0098] It is understandable that the above are only specific examples of the settings of the dental handpiece. In some other embodiments, the dental handpiece can also be set according to actual surgical needs, and is not limited to this.

[0099] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0100] (1) Only one set of motor drive units is provided, and the motor drive units are connected to any motor signal through the expansion unit, so as to realize the switching control of multiple motors by one set of motor drive units, thereby replacing the traditional control method of multiple motor drive units driving multiple motors, simplifying the circuit structure and saving costs;

[0101] (2) By setting up multiple groups of dental handpieces with individually controlled motors, multiple handpieces can be flexibly used in the same operation, reducing the waiting time caused by changing handpieces during the operation;

[0102] (3) By setting a water and gas control component in combination with a drive box and a control box, the currently used dental handpiece can be automatically identified and the work mode set in advance can be switched to drive the corresponding dental handpiece to work;

[0103] (4) An air pressure sensor is provided in the drive box to detect the state of the water-gas dual-control foot pedal of the dental instrument, so that the original water-gas dual-control foot pedal of the dental instrument can be used to control the dental instrument without adding an additional foot pedal, thereby simplifying the installation of the multi-motor dental handpiece device;

[0104] (5) By providing a first dental handpiece with an internal water channel, a second dental handpiece with a root canal file, and a third dental handpiece with an external water channel, most application scenarios in dental treatment can be met, and the applicability is strong.

[0105] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A multi-motor control circuit for controlling the switching operation of multiple motors, characterized in that: include: A main control unit, used to identify the corresponding motor and output a control signal of the motor; a motor drive unit, receiving the control signal and outputting a corresponding motor drive signal; The expansion unit is provided with a first input port, a second input port, a first relay group, and a plurality of output ports; the first input port is used to receive the control signal; the second input port is used to receive the motor drive signal; The input end of the first relay group is connected to the second input port, and the output end thereof is respectively connected to several of the output ports; the output ports are arranged in at least three groups in parallel, and each of the output ports is connected to one of the motors; the first relay group switches contacts according to the control signal to make the motor drive unit conductive with any of the motor signals.

2. The multi-motor control circuit according to claim 1, characterized in that: The second input port is provided with a three-phase input interface, and the output port is provided with a three-phase output interface; the first relay group includes a plurality of identical or different relays, and is provided with at least three input contacts correspondingly connected to the three-phase input interface, and a plurality of output contacts switchably connected to three or more groups of the three-phase output interfaces.

3. The multi-motor control circuit according to claim 2, characterized in that: The number of the output ports is three, and all of them are connected to the corresponding motors; The first relay group includes a first three-pole double-throw relay and a second three-pole double-throw relay; The input contacts of the first three-pole double-throw relay are respectively connected to the three-phase input interfaces; the output contacts of the first three-pole double-throw relay are connected to one group of the three-phase output interfaces, and the output contacts of the second three-pole double-throw relay are connected to the other two groups of the three-phase output interfaces.

4. The multi-motor control circuit according to claim 3, characterized in that: Also includes: A lighting driving unit, used to receive the control signal and output a lighting driving signal; the lighting driving unit is provided with a lighting signal output port, the second input port is further provided with a positive input interface and a negative input interface connected to the lighting signal output port; the output port further includes a positive output interface and a negative output interface, which are connected to the corresponding motor; The extension unit is also provided with a second relay group, which includes a first single-pole double-throw relay and a second single-pole double-throw relay arranged in series; the input contact of the first single-pole double-throw relay is connected to the positive input interface, and the first single-pole double-throw relay and the second single-pole double-throw relay switch the output contacts according to the control signal, so that the positive input interface is connected to one of the positive output interfaces, and the negative input interface is connected to each of the negative output interfaces, so that the lighting drive unit is conductively connected to one of the motors.

5. The multi-motor control circuit according to claim 1, characterized in that: Also includes: The power conversion unit is used to convert alternating current into direct current as an input voltage for the multi-motor control circuit.

6. A multi-motor control system, characterized in that: include: A water-gas component, a water-gas control component, a drive control component, and a plurality of dental handpieces with independent motors; the drive control component is provided with a multi-motor control circuit as described in any one of claims 1 to 5; The water and gas components are connected to the multiple groups of dental handpieces, and the water and gas supply for the multiple groups of dental handpieces is switched by the water and gas control components; The multi-motor control circuit is connected to a plurality of motors and performs switching control on the plurality of motors.

7. The multi-motor control system according to claim 6, characterized in that: The water-gas component is provided with an air flow path, and the air flow path is provided with a plurality of handle positions for correspondingly placing a plurality of groups of the dental handpieces; The water and gas control component includes a plurality of air pressure switches arranged on the air flow path, and the air pressure switch is connected to the handle position; each handle position is provided with a hanger valve to open or close the air flow path between the handle position and the air pressure switch; when the dental handpiece leaves the handle position, the hanger valve opens, and the air flow path between the corresponding handle position and the air pressure switch is connected, and the air pressure switch detects the air pressure signal and converts it into a level signal for identifying the dental handpiece used.

8. The multi-motor control system according to claim 7, characterized in that: The water-gas component further comprises a water flow path; the end of the water flow path is divided into a plurality of water flow branches, and the end of the gas flow path is divided into a plurality of air flow branches; one of the water flow branches and one of the air flow branches are simultaneously connected to a water-gas pipe of the motor; The water vapor control component also includes a plurality of solenoid valves and water vapor switches arranged on the water flow branch and the air flow branch; the solenoid valves are connected to the water vapor switches one by one to control the opening or closing of the corresponding water vapor switches to control the conduction and cutoff of the corresponding water flow branch and the air flow branch.

9. The multi-motor control system according to claim 6, characterized in that: Also includes: A sterile water component, used for providing sterile water to the dental handpiece; The drive control component is also provided with a stepper motor drive unit for receiving a control signal and responding to drive the sterile water component to work.

10. A dental device, characterized in that: include: A multi-motor control system as described in any one of claims 6 to 9.

Images