CN111789660A

CN111789660A - Bone drill equipment

Info

Publication number: CN111789660A
Application number: CN202010809388.5A
Authority: CN
Inventors: 杨健
Original assignee: Suzhou Meixindis Medical Technology Co ltd
Current assignee: Suzhou Meixindis Medical Technology Co ltd
Priority date: 2019-10-14
Filing date: 2020-08-12
Publication date: 2020-10-20
Also published as: CN110547847A; CN212699039U

Abstract

The application discloses bone drill equipment includes: a motor equipped with a puncture needle; the control circuit is electrically connected with the motor and controls the motor to rotate; and when the motor runs and the control circuit receives an emergency stop signal, the control circuit controls the two poles of the motor to be grounded, so that the motor stops running within a preset time. This application makes its two poles of the earth do not possess the potential difference through the same potential of control circuit control motor two poles of the earth, and the motor loses its moving magnetic field of drive, and then makes the quick shut down of motor, plays the effect of protection patient and bone drill equipment self, and then the life of extension equipment.

Description

Bone drill equipment

Technical Field

The application belongs to the technical field of medical equipment, concretely relates to bone drill equipment.

Background

At present, bone drilling equipment on the market is in a mode of directly cutting off an electric energy source of a motor under the conditions that the equipment is triggered to stop due to abnormity, the equipment is triggered to stop due to failure, or a user triggers the equipment to stop by self, so that the motor stops running, and the motor stops consuming too long time.

Disclosure of Invention

In view of the above-mentioned shortcomings or drawbacks of the prior art, the present application addresses the technical problem of providing a bone drill apparatus.

In order to solve the technical problem, the application is realized by the following technical scheme:

the application provides a bone drill device, the bone drill device includes:

a motor equipped with a puncture needle;

the control circuit is electrically connected with the motor and controls the motor to rotate;

and when the motor runs and the control circuit receives an emergency stop signal, the control circuit controls the two poles of the motor to be grounded, so that the motor stops running within a preset time.

Further, the bone drill apparatus described above, wherein said bone drill apparatus further comprises: the steering selection circuit is used for generating a first steering signal and a second steering signal, the first steering signal and the second steering signal correspond to the operation steering of the motor and are respectively a first operation steering and a second operation steering, and the first operation steering is different from the second operation steering.

Further, the bone drill apparatus described above, wherein the bone drill apparatus further comprises a power circuit and a ground terminal;

the control circuit comprises a control chip and a first electric energy input end, the control chip is respectively connected with the first electric energy input end and the grounding end, and the first electric energy input end is used for being connected with the power circuit and transmitting electric energy from the power circuit to the motor and the control chip.

Further, in the bone drilling device, the control circuit further includes a first switch, a second switch, a third switch and a fourth switch, and the motor has a first electrode and a second electrode;

the first switch is respectively connected with the first electric energy input end, the control chip and the first electrode, the second switch is respectively connected with the first electric energy input end, the control chip and the second electrode, the third switch is respectively connected with the control chip, the first electrode and the grounding terminal, and the fourth switch is respectively connected with the control chip, the second electrode and the grounding terminal;

the control chip is used for conducting the first switch and the fourth switch so that the motor operates in a first operation steering mode corresponding to the first steering signal; or the control chip is used for conducting the second switch and the third switch, so that the motor operates in a second operation steering mode corresponding to the second steering signal.

Further, in the bone drilling device, when the motor turns to the first operation or the second operation and the control chip receives an emergency stop signal, the third switch and the fourth switch are in a conducting state, and the first electrode and the second electrode are respectively connected to the ground terminal, so that the motor stops operating within a preset time.

Further, in the bone drilling device, the power circuit further includes a battery assembly, a power chip and an electric energy output terminal,

the positive electrodes of the batteries in the battery assembly are connected to the power supply chip so as to detect the voltage of the batteries in the battery assembly through the power supply chip, and the electric energy output end is connected with the motor through a power supply switch so as to conduct the electric energy output end and the motor when the power supply switch is conducted;

when the voltage of at least part of batteries in the battery assembly is not within the voltage threshold range of a single battery, the control circuit controls two poles of the motor to be grounded, so that the motor does not operate;

or the control circuit acquires the current electric quantity of the battery assembly in the use process of the bone drilling equipment, and controls the two poles of the motor to be grounded when the current electric quantity of the battery assembly is smaller than an electric quantity threshold value, so that the motor does not operate, wherein the current electric quantity of the battery assembly is converted from the current voltage of the battery assembly.

Further, in the bone drill apparatus, the power threshold is 30% of the maximum power of the battery assembly.

Further, the bone drilling device is characterized in that the voltage threshold of the single battery is in a range of 2.7V-4.225V.

Further, in the bone drilling device, the power circuit further includes a fifth switch, a first end of the fifth switch is grounded, a second end of the fifth switch is connected to the motor, and a control end of the fifth switch is connected to the power chip;

when the power switch is in a conducting state and the voltage of at least part of batteries in the battery assembly is not in the voltage threshold range of the single battery, the fifth switch is in a disconnecting state, so that a circuit loop corresponding to the motor is disconnected, and the motor does not run.

Further, in the bone drilling device, the power circuit further includes a first charging terminal and a second charging terminal, the first charging terminal is connected to the positive electrode of the battery assembly and is further used for being connected to the positive electrode of an external power source so as to transmit the electric energy from the external power source to the battery assembly for charging, and the second charging terminal is grounded.

Further, in the bone drilling device, the control circuit further includes a second power input end, and the second power input end is respectively connected to the power output end and the control chip, so that when the power switch is turned off, the power from the power output end is transmitted to the control chip.

Further, in the bone drilling device, the power circuit further includes a first conducting switch and a second conducting switch,

the first conducting switch is arranged between the first charging end and the control circuit, and the second conducting switch is arranged between the power output end and the second power input end;

the control end of the first conducting switch is connected with the first charging end, the first end of the first conducting switch is connected with the control end of the second conducting switch, and the second end of the first conducting switch is grounded;

the first end of the second conducting switch is connected with the electric energy output end, and the second end of the second conducting switch is connected with the second electric energy input end;

in the process of charging the power circuit, the first conducting switch and the second conducting switch are in a conducting state, and the control circuit controls the two poles of the motor to be grounded, so that the motor stops running within a preset time.

Further, in the bone drilling device, the power circuit further includes a sixth switch, a control terminal of the sixth switch is connected to the power chip, a first terminal of the sixth switch is connected to the first charging terminal, and a second terminal of the sixth switch is connected to the positive electrode of the battery assembly;

when the battery assembly is charged, the sixth switch is in a conducting state; and after the battery pack is charged, the sixth switch is in an off state.

Further, in the bone drilling device, the power circuit further includes a one-way conduction element, and the one-way conduction element is connected between a connection point of the power chip connected to the positive electrode of the battery assembly and the second end of the sixth switch, so as to prevent current from flowing back from the positive electrode of the battery assembly to the second end of the sixth switch.

Further, in the bone drilling device, the motor is connected to the negative electrode of the power circuit and then grounded, and a circuit between the motor and the negative electrode of the power circuit is further connected to the control chip and the sampling resistor;

the sampling current collected by the sampling resistor is transmitted to the control chip, and the control chip obtains an effective value and an instantaneous value of the current passing through the motor through the sampling current;

the control chip acquires an effective value of current passing through the motor, and controls the two poles of the motor to be grounded when the effective value of the current passing through the motor is smaller than a no-load current threshold value and lasts for a set time length, so that the motor stops running within a preset time length;

or the control chip acquires an effective value of the current passing through the motor, and controls the two poles of the motor to be grounded when the effective value of the current passing through the motor is greater than an overload current threshold value and lasts for a set time length, so that the motor stops running within a preset time length;

or the control chip acquires the instantaneous value of the current passing through the motor and controls the two poles of the motor to be grounded when the instantaneous value of the current passing through the motor is larger than the short-circuit current threshold value, so that the motor stops running within a preset time period.

Further, the bone drill device described above further includes an analysis circuit, and the circuit between the motor and the negative electrode of the power circuit is connected to the control chip through the analysis circuit, so as to transmit the sampling current to the control chip through the analysis circuit.

Further, in the bone drilling device, the analysis circuit includes an operational amplifier circuit, the operational amplifier circuit is connected between the control chip and the first electrode or the second electrode, and the sampling current is converted into an effective value of current through the operational amplifier circuit and transmitted to the control chip.

Further, in the bone drilling device, the analysis circuit further includes a filter circuit, the filter circuit is connected between the control chip and the first electrode or the second electrode, and the sampling current is converted into an instantaneous value of the current through the filter circuit and transmitted to the control chip.

Further, in the bone drilling device, a comparator is disposed in the control chip, the comparator is connected to the first electrode or the second electrode, and the current passing through the motor is transmitted to the comparator to detect whether an instantaneous value of the current passing through the motor is greater than the short-circuit current threshold.

Further, in the bone drilling device, the control chip is provided with a first steering port and a second steering port, and the first steering port and the second steering port are respectively connected to a preset potential;

the steering selection circuit comprises a steering selection switch, a first end of the steering selection switch is grounded, and a second end of the steering selection switch is used for being connected with the first steering port or the second steering port so as to pull down the potential of the first steering port or the second steering port and further generate the first steering signal or the second steering signal;

the preset potential is higher than the potential of the first end of the steering selection switch.

Further, the bone drill apparatus described above wherein the first steering port and the second steering port are each connected to the power circuit.

Further, in the bone drill apparatus, the steering selection switch further includes a control end, and the control end allows a user to operate and control the steering selection switch, so that the second end of the steering selection switch is connected to the first steering port, connected to the second steering port, or suspended from the second end of the steering selection switch.

Further, the bone drill device described above further includes a thermal element disposed close to the battery assembly to reflect the current temperature of the battery assembly, and the control circuit obtains the current temperature of the battery assembly reflected by the thermal element during the use of the bone drill device, and controls the two poles of the motor to be grounded when the current temperature of the battery assembly is greater than a temperature threshold, so that the motor does not operate.

Further, the bone drilling device described above, wherein the bone drilling device further comprises a power switch, the power switch is disposed between the control circuit and the power circuit, and the power circuit is further connected to the motor through the power switch;

after the control circuit controls the two poles of the motor to be grounded so as to block the motor and the power circuit, the power switch is firstly switched off and then switched on, so that the control circuit is switched on with the power circuit again, the control circuit controls the motor to be switched on with the power circuit again, and the motor is operated again.

Further, the bone drill device as described above, wherein the steering selection switch is exposed outside the housing of the bone drill device, and the steering selection switch further has three shift positions respectively corresponding to the first operation steering, the second operation steering and the floating, so as to indicate the operation steering of the motor or control the motor not to operate.

Further, above-mentioned bone drill equipment, wherein, bone drill equipment still includes first circuit board, first circuit board is located the casing of bone drill equipment and is connected the motor, still locate on the first circuit board and connect the motor control circuit, in order to control the motor operation.

Further, in the bone drill apparatus, the housing is provided with a first slot for mounting the first circuit board.

Further, foretell bone drill equipment, wherein, bone drill equipment still includes second circuit board and switch, the second circuit board is located in the casing of bone drill equipment and connect switch and battery pack, be equipped with the connection on the second circuit board switch and battery pack power supply circuit, in order to switch on when switch switches on power supply circuit with control circuit, in order with battery pack's electric energy transmission extremely the motor.

Further, in the bone drill device, a second slot for mounting the second circuit board is further formed in the housing.

Further, above-mentioned bone drill equipment, wherein, bone drill equipment still includes the interface that charges, the casing exposes the interface setting that charges to the interface that charges is connected the power supply circuit on the second circuit board.

Further, the bone drill device further comprises an indicator light set, the indicator light set is connected with the control circuit, and the indicator light set comprises a plurality of indicator lights for indicating the residual capacity of the bone drill device.

Compared with the prior art, the method has the following technical effects:

in the application, when the motor operates, turns to an operation process and the control circuit receives an emergency stop signal, the control circuit is used for controlling the two poles of the motor to be grounded, so that the motor stops operating within a preset time. Through the mode, the control circuit controls the two poles of the motor to have the same potential, so that the two poles of the motor do not have potential difference, the motor loses a magnetic field for driving the motor to operate, and the motor stops operating.

In this application switch with turn to the selector switch cooperation control motor operation, switch is used for controlling the entire system of bone drill equipment and goes up the electricity, and turn to the selector switch and then be used for the operation of selecting the motor and turn to for the power control of bone drill equipment and steering control are more reasonable, can improve the power control of bone drill equipment and steering control's rationality, more convenient in the user use, are favorable to improving user's result of use.

This application has the protection and triggers the design, through the two poles of the earth of control circuit control motor to block motor and power supply circuit after, switch breaks off earlier then switches on, make control circuit switch on with power supply circuit again, thereby make control circuit control motor switch on with power supply circuit again, and then make the motor move again. The bone drill device can be re-triggered to work, which requires the user to reset the power switch and then turn on the power switch, rather than being automatically re-triggered by the bone drill device to work. Therefore, when the bone drilling equipment is stopped due to abnormality, the user is allowed to carry out troubleshooting, and the user triggers the bone drilling equipment to work again after the user clears the fault, so that the safety of the bone drilling equipment can be improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of an electrical circuit configuration of an embodiment of the present bone drill apparatus;

FIG. 2 is a schematic circuit diagram of a portion of the circuitry of the bone drilling apparatus of FIG. 1;

fig. 3 is a schematic circuit diagram of an embodiment of an operational amplifier circuit in the present application;

FIG. 4 is a schematic circuit diagram of an embodiment of a filter circuit according to the present application;

FIG. 5 is a schematic circuit diagram of another portion of the circuitry of the bone drilling apparatus of FIG. 1;

FIG. 6 is a schematic diagram of an electrical circuit configuration of another embodiment of the electrical circuit of the bone drilling apparatus of the present application;

FIG. 7 is a schematic circuit diagram of an embodiment of a steering selection circuit according to the present application;

FIG. 8 is a schematic circuit diagram of an embodiment of a power display circuit according to the present application;

FIG. 9 is a schematic structural view of an embodiment of the bone drilling apparatus of the present application;

fig. 10 is a schematic view of another configuration of the bone drill apparatus shown.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1, in one of the embodiments of the present application, a bone drill apparatus includes:

a motor 1, wherein the motor 1 is provided with a puncture needle;

the control circuit 2 is also electrically connected with the motor 1, and the control circuit 2 controls the motor 2 to rotate;

in the operation and steering process of the motor 1, when the control circuit 2 receives an emergency stop signal, the control circuit 2 controls the two poles of the motor 1 to be grounded, so that the motor 1 stops operating within a preset time.

Further, this embodiment further includes: the steering selection circuit 8 is further electrically connected with the control circuit 2, the steering selection circuit 8 is configured to generate a first steering signal and a second steering signal, the first steering signal and the second steering signal correspond to a first operation steering and a second operation steering of the motor 1, respectively, and the first operation steering is different from the second operation steering.

Specifically, the control circuit 2 controls the motor 1 to operate in the first operation steering mode corresponding to the first steering signal, or controls the motor 1 to operate in the second operation steering mode corresponding to the second steering signal, and when the control circuit 2 receives an emergency stop signal during the operation of the motor 1 in the first operation steering mode or the second operation steering mode, the control circuit 2 controls the two poles of the motor 1 to be grounded, so that the motor 1 stops operating within a preset time period.

When abnormality occurs in the bone drilling equipment, such as current overload, rotation blockage, and over-high temperature, the control chip 21 described below receives an emergency stop signal, so as to control the motor 1 to stop operating within a preset time period.

The above-mentioned preset time period is preferably not more than 0.5s, such as 0.1s, 0.2s, 0.3s, 0.4s, 0.5s, etc., which means that the motor of the present embodiment can be stopped faster than the motor of the conventional bone drilling apparatus. Therefore, when the bone drilling equipment performs the bone drilling operation, the motor 1 can be stopped more quickly, the damage degree of bones, prostheses or implants of a patient and the bone drilling equipment caused by excessive actions of the motor due to overlong motor stopping time and the damage degree of the bone drilling equipment can be effectively reduced, the effect of protecting the patient and the bone drilling equipment is achieved, and the service life of the bone drilling equipment is further prolonged.

It should be noted that a grounding terminal 4 may be disposed in the bone drilling device, and each circuit or component inside the bone drilling device is connected to the grounding terminal 4 to achieve grounding. The grounds shown in fig. 1 are all connected to ground 4.

Wherein, in one embodiment, the first operational turn is a clockwise turn and the second operational turn is a counterclockwise turn; or the first operation steering is anticlockwise steering, and the second operation steering is clockwise steering.

In one embodiment, the bone drilling apparatus is a tool used in surgery to drill a hole in a bone. This application assembles the pjncture needle through the motor and is rotated by motor drive pjncture needle, and then drills out required hole on the skeleton to the going on of cooperation surgery. The motor is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law. The main function is to generate driving torque, which is used as a power source of electrical appliances or various machines and converts electric energy into mechanical energy. The motor in the present embodiment may be a brush motor or the like, which is a rotating electric machine that incorporates a brush device and is capable of converting electric energy into mechanical energy or converting mechanical energy into electric energy. The speed-regulating device has the characteristics of quick start, timely braking, capability of smoothly regulating the speed in a large range, relatively simple circuit structure and the like. Of course, in other embodiments of the present application, the motor may also be a brushless motor, etc., and is not limited herein.

The motor 1 has a first electrode 11 and a second electrode 12, and a magnetic field is generated by generating a potential difference between the first electrode 11 and the second electrode 12 of the motor 1 to drive the motor 1 to operate, it should be noted that, in both cases where the first electrode 11 is at a high potential and the second electrode 12 is at a low potential and the first electrode 11 is at a low potential and the second electrode 12 is at a high potential, the operation direction of the motor 1 is opposite, for example, clockwise direction or counterclockwise direction.

Further, the bone drilling equipment further comprises a power supply circuit 3 and a grounding terminal 4, wherein the power supply circuit 3 is used for supplying electric energy to the bone drilling equipment so as to maintain the operation of the bone drilling equipment and the operation of the driving motor 1; control circuit 2 includes control chip 21 and first electric energy input 22, control chip 21 connects respectively first electric energy input 22 with earthing terminal 4, first electric energy input 22 is used for connecting power supply circuit 3 and will come from power supply circuit 3's electric energy transmission is in the motor 1 with control chip 21 to the energy supply to motor 1 and control chip 21. The control chip 21 is integrated with a logic control circuit 2, which is a core control part of the bone drilling equipment and is used for controlling all components in the bone drilling equipment to work in a coordinated manner. The control chip 21 may be a low power consumption MCU (micro controller Unit) or the like, so as to reduce the power consumption of the bone drill device, and the power consumption of the bone drill device provided in this embodiment is less than 10 μ a.

As shown in fig. 1 and fig. 2, in the present embodiment, since the entire control system of the bone drilling apparatus is integrated with many logic operation circuits and modules, the operating voltages required by different circuits and modules may be different. In view of this, the bone drilling apparatus further comprises a voltage conversion circuit 24 to provide electrical energy inputs of different voltage magnitudes to the overall control system of the bone drilling apparatus.

Specifically, the voltage conversion circuit 24 includes a voltage conversion chip 241 and a first voltage supply terminal 242 and a second voltage supply terminal 243 connected to the voltage conversion chip 241. The first voltage supply terminal 242 is connected to the first power input terminal 22, and the first voltage supply terminal 242 supplies a first voltage to supply power from the power circuit 3 to the corresponding circuits and modules including the control chip 21. And, the power received by the first voltage providing terminal 242 passes through the voltage converting chip 241, is converted into power having the second voltage by the voltage converting chip 241 and provides the power from the power circuit 3 to the corresponding circuits and modules including the control chip 21 from the second voltage providing terminal 243. The voltage converting chip 241 is also disposed at ground.

Preferably, in this embodiment, the first voltage supply terminal 242 may provide 9V of power, and the second voltage supply terminal 243 may provide 5V of power, which is not limited herein.

In one embodiment, the control circuit 2 further comprises a first switch 231, a second switch 232, a third switch 233 and a fourth switch 234. The first switch 231 is connected to the first power input terminal 22, the control chip 21 and the first electrode 11, the second switch 232 is connected to the first power input terminal 22, the control chip 21 and the second electrode 12, the third switch 233 is connected to the control chip 21, the first electrode 11 and the ground terminal 4, and the fourth switch 234 is connected to the control chip 21, the second electrode 12 and the ground terminal 4.

The first switch 231, the second switch 232, the third switch 233 and the fourth switch 234 are all connected with the control chip 21, and the control chip 21 is configured to control the on and off of the first switch 231, the second switch 232, the third switch 233 and the fourth switch 234, so as to implement different control functions.

Specifically, the control chip 21 controls the first switch 231 and the fourth switch 234 to be in a conducting state, at this time, the first electrode 11 is connected to the first power input end 22, the second electrode 12 is connected to the ground end 4, when the first power input end 22 has power input, the first power input end 22 transmits the power received by the first power input end to the first electrode 11, so that the first electrode 11 is at a high potential, the second electrode 12 is connected to the ground end 4 and is at a low potential, and a potential difference exists between the first electrode 11 and the second electrode 12, so that the motor 1 turns to operate in a first operation corresponding to the first turning signal; and the control chip 21 controls the second switch 232 and the third switch 233 to be in a conducting state, at this time, the first electrode 11 is connected to the ground terminal 4, the second electrode 12 is connected to the first power input terminal 22, when the first power input terminal 22 has power input, the first power input terminal 22 transmits the power received by the first power input terminal to the second electrode 12, so that the second electrode 12 is at a high potential, the first electrode 11 is connected to the ground terminal 4 and is at a low potential, and a potential difference exists between the first electrode 11 and the second electrode 12, so that the motor 1 turns to operate in a second operation direction corresponding to the second turning signal.

Further, in the process that the motor 1 turns to the first operation direction or the second operation direction and the control chip 21 receives the emergency stop signal, the third switch 233 and the fourth switch 234 are in the on state, at this time, the first electrode 11 and the second electrode 12 are not connected to the first electric energy input end 22, but are connected to the ground terminal 4, so that the electric potentials of the first electrode 11 and the second electrode 12 are the same, the first electrode 11 and the second electrode 12 do not have the electric potential difference, the motor 1 loses the magnetic field for driving the motor 1 to operate, and further, the motor 1 stops operating within the preset time period.

In traditional bone drilling equipment, the electric energy input of the motor is usually directly cut off to control the motor to stop rotating, so that residual electric energy in the motor can be caused, the residual electric energy can delay the elimination of an original magnetic field, the motor is prevented from stopping rotating, and the time consumption of the motor to stop rotating is long. In this embodiment, the control chip 21 controls the first electrode 11 and the second electrode 12 to be respectively connected to the ground terminal 4, and the electric energy remaining in the motor 1 after the input of the electric energy is cut off can be completely released at the ground terminal 4, so as to reduce the electric energy remaining in the motor 1, and thus the motor 1 can stop operating within a preset time period.

Further, as shown in fig. 1 and fig. 5, the power circuit 3 further includes a battery assembly 32, a power chip 35 and an electric energy output terminal 31, the battery assembly 32 preferably includes a plurality of lithium batteries connected in series, for example, 3 lithium batteries, and the like, the battery assembly 32 is a provider of the electric energy output by the power circuit 3, so as to provide the electric energy for the whole system of the bone drilling device; the power output terminal 31 is used for outputting the power of the power circuit 3 to supply power to the bone drilling equipment. The control circuit 2 is configured to connect the battery assembly 32 to obtain a current voltage of the battery assembly 32 during use of the bone drilling apparatus and to control the motor 1 to not operate when the current voltage of the battery assembly 32 is not within the voltage threshold range. The power supply chip 35 is preferably a charge/discharge management chip or the like. The power supply chip 35 is connected to the battery pack 32. Specifically, the motor 1 is not operated when the voltage of at least a portion of the batteries 321 present in the battery assembly 32 is not within the single battery voltage threshold range. The positive electrodes of the batteries 321 in the battery assembly 32 are respectively connected to the power chip 35, so that the power chip 35 can detect the voltage of each battery 321 in the battery assembly 32. The power chip 35 is further connected to the control chip 21 in the control circuit 2, and the control chip 21 detects whether the current voltage of the battery assembly 32 is within the voltage threshold range during the use of the bone drilling device.

When the voltage of at least part of the batteries in the battery assembly 32 is not within the single battery voltage threshold range, the control circuit 2 controls the two poles of the motor 1 to be grounded, so as to control the motor 1 not to run; specifically, when at least part of the current voltage of the battery assembly 32 is not within the voltage threshold range, the control chip 21 controls the third switch 233 and the fourth switch 234 to be in the on state, so that the first electrode 11 and the second electrode 12 are grounded, respectively. If the motor 1 is in a running state, the first electrode 11 and the second electrode 12 are respectively grounded, so that the motor 1 is rapidly stopped; if the motor 1 does not start to operate, the first electrode 11 and the second electrode 12 are grounded, respectively, so that the motor 1 cannot operate even if the power switch 5 is turned on. It is to be understood that the control of the non-operation of the motor 1 includes both the control of the motor 1 to stop operating for a preset time period or the maintenance of the non-operation of the motor 1, and the following is applicable.

Preferably, the voltage threshold range is preferably 8.1V-12.6V. The current voltage of the battery assembly 32 is less than 8.1V, which indicates that the battery assembly 32 needs to be stopped immediately to continue discharging when the battery assembly 32 is over-discharged, so as to avoid damage to the battery assembly 32 due to over-discharge. And the current voltage of battery assembly 32 is greater than 12.6V, indicating that battery assembly 32 is overcharged.

Wherein the voltage threshold range of the single battery is 2.7V-4.225V.

Therefore, when any battery 321 in the battery assembly 32 is under-voltage due to over-discharge or damaged, the power chip 35 can detect the change of the abnormal voltage of the battery 321 in time, that is, the voltage of the abnormal battery 321 is not within the threshold range of the voltage of the single battery, and the motor 1 does not operate, so that the battery assembly 32 stops discharging with high power, and further damage to the battery 321 in the battery assembly 32 is avoided.

Referring to fig. 1 and 5, the battery assembly 32 includes three batteries 321, positive electrodes of the batteries 321 are respectively connected to a first battery voltage port 351, a second battery voltage port 352, and a third battery voltage port 353 of the power chip 35 to respectively detect voltages of the batteries 321, in fig. 5, the first battery voltage port 351 is directly connected to the power output terminal 31, the second battery voltage port 352 and the third battery voltage port 353 are connected to an interface circuit board 354, the interface circuit board 354 is respectively connected to positive electrodes of the batteries 321 in the battery assembly 32, so that the positive electrodes of the batteries 321 in the battery assembly 32 are respectively connected to the power chip 35, and a port for receiving power, i.e., VDD shown in fig. 1 and 5, of the power chip 35 is connected to the power output terminal 31.

Of course, the control circuit 2 can also obtain the current electric quantity of the battery assembly 32 by obtaining the current electric quantity of the bone drilling device in the using process, and control the two poles of the motor 1 to be grounded when the current electric quantity of the battery assembly 32 is smaller than the electric quantity threshold value, so as to control the motor 1 not to operate, thereby playing a role in protecting the battery assembly 32 from over-discharge. When the current capacity of the battery assembly 32 is less than the capacity threshold, the motor 1 is controlled not to operate, and the control chip 21 also controls the third switch 233 and the fourth switch 234 to be in the on state, so that the first electrode 11 and the second electrode 12 are grounded, respectively, and the motor 1 stops operating or maintains the non-operating state of the motor 1.

The current electric quantity of the battery assembly 32 is obtained by converting the current voltage of the battery assembly 21, and after the control chip 21 obtains the current voltage of the battery assembly 32, the current electric quantity of the battery assembly 32 is obtained by converting, so that the current remaining electric quantity and the electric quantity display of the battery assembly 32 are counted conveniently.

The charge threshold is preferably 30% of the maximum charge of the battery assembly 32. The power threshold is defined as the minimum power requirement that can ensure that the bone drill device meets the surgical requirements. When the current electric quantity of the battery assembly 32 is smaller than the electric quantity threshold value, it is indicated that the residual electric quantity of the bone drill equipment is too low, which easily causes the problem of poor bone drill effect caused by too low electric quantity of the bone drill equipment in the operation process, and can cause adverse effect on the operation effect. Therefore, the present embodiment needs to monitor the current electric quantity of the battery assembly 32, and when the current electric quantity of the battery assembly 32 is smaller than the electric quantity threshold, the motor 1 is controlled not to operate, so as to ensure that the bone drilling device has a good bone drilling effect.

Further, the bone drilling device further comprises a power switch 5, the power switch 5 is arranged between the control circuit 2 and the power circuit 3, the power circuit 3 is further connected with the motor 1 through the power switch 5, specifically, the power switch 5 is connected between the first power input end 22 of the control circuit 2 and the power output end 31 of the power circuit 3, so as to conduct the first power input end 22 and the power output end 31 when the power switch 5 is conducted, and at the moment, the first power input end 22 can receive power from the power output end 31 of the power circuit 3 to supply power to the control chip 21 and the motor 1. It will be appreciated that the first power input 22 is only able to supply power to the control chip 21 and the motor 1 when the power switch 5 is switched on.

Of course, in one embodiment of the present application, the power switch 5 is turned on, at this time, the power supply path is not formed between the motor 1 and the power circuit 3, the motor 1 does not start to operate, and the bone drill detects an abnormality, for example, the temperature of the battery assembly 32 is too high, the voltage of the battery assembly 32 is too low, and the like, the control circuit 2 also blocks the motor 1 and the power circuit 3, so that the motor 1 and the power circuit 3 cannot form the power supply path, and the motor 1 cannot operate.

The power switch 5 is turned off and then turned on, so that the control chip 21 is powered on again, and the condition of the bone drill is analyzed again, including whether the temperature of the battery assembly 32 is normal or not, whether the voltage of the battery assembly 32 is normal or not and the like. When the bone drill is abnormal, the control chip 21 controls the motor 1 to normally operate, including controlling the motor 1 to operate in the first operation steering or the second operation steering. Specifically, the control chip 21 is turned on again with the power supply circuit 3 and receives power from the power supply circuit 3, and the control chip 21 turns on the first switch 231 and the fourth switch 234, that is, controls the first switch 231 and the fourth switch 234 to be in the on state, or turns on the second switch 232 and the third switch 233, that is, controls the second switch 232 and the third switch 233 to be in the on state, so that the motor 1 is operated again.

Above can see that the bone drilling equipment of this embodiment has the protection and triggers the design, specifically, at the two poles of the earth of control circuit 2 control motor 1 to block motor 1 and power supply circuit 3 after, switch 5 breaks off earlier then switches on, makes control circuit 2 switch on with power supply circuit 3 again, thereby makes control circuit 2 control motor 1 switch on with power supply circuit 3 again, and then makes motor 1 rerun.

It should be noted that, because the occurrence of an abnormality in the bone drilling apparatus is uncontrollable, it is likely that the power switch 5 is still in the on state when the abnormality occurs, and the power circuit 3 is still supplying power to the motor 1. When the abnormality occurs in this embodiment, the control chip 21 controls the third switch 233 and the fourth switch 234 to be in the on state, so that the first electrode 11 and the second electrode 12 are not connected to the first power input end 22, and therefore the power supply path between the power circuit 3 and the motor 1 can be automatically cut off in time, and even if the power switch 5 is in the on state, the power circuit 3 does not continue to supply power to the motor 1.

Further, the first power input terminal 22 is connected to a port of the control chip 21 receiving power, so that the control chip 21 can receive power from the first power input terminal 22. The first power input terminal 22 is further connected to a port of the control chip 21 for detecting the voltage of the first power input terminal 22, such as the first voltage detection port 211 of the control chip 21 shown in fig. 1, so as to detect whether the voltage of the first power input terminal 22 is abnormal during the use of the bone drilling device.

As shown in fig. 1 and 5, the power circuit 3 further includes a fifth switch 361. A first end of the fifth switch 361 is grounded, a second end of the fifth switch 361 is connected with the motor 1, and a control end of the fifth switch 361 is connected with the power chip 35. That is, the fifth switch 361 is connected to the motor 1 and then grounded, so that a complete circuit loop is formed between the power circuit 3 and the motor 1 to enable the motor 1 to operate normally. When the power switch 5 is in the on state, and when the voltage of at least a part of the batteries 321 in the battery assembly 32 is not within the threshold range of the voltage of a single battery, the power chip 35 controls the fifth switch 361 to be in the off state, so that the circuit loop corresponding to the motor 1 is opened, and the motor 1 is not operated.

Further, the voltage threshold range of the single battery is preferably 2.7V-4.225V, and when the voltage of the single battery 321 in the battery assembly 32 is less than 2.7V, the single battery 321 is considered to be over-discharged or damaged; when the voltage of the single battery 321 in the battery assembly 32 is greater than 4.225V, the single battery 321 is considered to be overcharged.

Further, the power circuit 3 further includes a sixth switch 362, a control terminal of the sixth switch 362 is connected to the power chip 35, a first terminal of the sixth switch 362 is connected to the first charging terminal 331, and a second terminal of the sixth switch 362 is connected to the positive electrode of the battery assembly 32. When the external power supply 7 connected to the first charging terminal 331 and the second charging terminal 332 charges the battery assembly 32, the power chip 35 controls the sixth switch 362 to be turned on, and the power received by the first charging terminal 331 from the external power supply 7 is supplied to the battery assembly 32 for charging; after the battery assembly 32 is charged, the power chip 35 controls the sixth switch 362 to be turned off, so that the external power supply 7 stops charging the battery assembly 32, and the battery assembly 32 is prevented from being overcharged.

Further, the power circuit 3 further includes a unidirectional conducting element 6, and the unidirectional conducting element 6 is connected between a connection point of the power chip 35 (i.e. VDD shown in fig. 1) for receiving electric energy and the positive electrode of the battery assembly 32, and the second end of the sixth switch 362, so as to prevent current from flowing backwards from the positive electrode of the battery assembly 32 to the second end of the sixth switch 362.

As shown in fig. 5, the power circuit 3 further includes a first charging terminal 331 and a second charging terminal 332, and the first charging terminal 331 and the second charging terminal 332 are used for connecting an external power source 7 to charge the power circuit 3. Specifically, the first charging terminal 331 is configured to be connected to the positive electrode of the external power source 7, the first charging terminal 331 is further connected to the positive electrode of the battery assembly 32 to charge the battery assembly 32, the second charging terminal 332 is configured to be connected to the negative electrode of the external power source 7, and the second charging terminal 332 is grounded to ground the negative electrode of the external power source 7.

Further, the power supply circuit 3 further includes a first on switch 341 and a second on switch 342, the first on switch 341 is disposed between the first charging terminal 331 and the control circuit 2, and the second on switch 342 is disposed between the power output terminal 31 and a second power input terminal 25 described below; a control terminal of the first on-switch 341 is connected to the first charging terminal 331, a first terminal of the first on-switch 341 is connected to a control terminal of the second on-switch 342, and a second terminal of the first on-switch 341 is grounded; a first end of the second on-switch 342 is connected to the power output terminal 31, and a second end of the second on-switch 342 is connected to a second power input terminal 25 described below; in the charging process of the power circuit 3, the first conduction switch 341 and the second conduction switch 342 are in a conduction state, and the control circuit 2 controls the two poles of the motor 1 to be grounded, so that the motor 1 stops operating within a preset time period.

Preferably, the second on switch 342 exhibits low potential on and high potential off. In the process of charging the battery assembly 32, the first charging terminal 331 is connected to the positive electrode of the external power source 7, the first charging terminal 331 is at a high voltage level to control the first conducting switch 341 to be conducted, so that the control terminal of the second conducting switch 342 is grounded, and the control terminal of the second conducting switch 342 is at a low voltage level, so that the power output terminal 31 is conducted with the second power input terminal 25 described below. Therefore, during the charging process of the battery pack 32, the power circuit 3 can also supply power to the control chip 21, so that the control chip 21 can monitor the charging process of the battery pack 32. Also, during the charging of the power circuit 3, the first and second turn-on

switches

341 and 342 are in the on state, and the third and

fourth switches

233 and 234 of the control circuit 2 are in the on state, so that the motor 1 is not operated, and even though the power switch 5 is turned on, a power supply path cannot be formed between the first power input terminal 22 and the motor 1, so that the motor 1 can maintain the non-operated state. That is to say, the bone drill equipment of this embodiment is inoperative when charging, can avoid in the charging process to touch switch 5 by mistake and lead to motor 1 operation, improves the security of bone drill equipment.

It should be noted that when the battery assembly 32 is not being charged, the first conducting switch 341 and the second conducting switch 342 are both turned off, that is, the power output terminal 31 and the second power input terminal 25 are in an off state, and the power output terminal 31 does not supply power to the control chip 21 through the second power input terminal 25.

Further, the control circuit 2 further includes a second power input terminal 25, and the second power input terminal 25 is respectively connected to the power output terminal 31 and the control chip 21, so as to transmit the power from the power output terminal 31 to the control chip 21 when the power switch 5 is turned off.

Further, the circuit between the power output terminal 31 and the second power input terminal 25 is also connected to a port of the control chip 21 for detecting the current voltage of the battery assembly 32 during the charging process of the battery assembly 32, such as the second voltage detection port 212 of the control chip 21 shown in fig. 1. When the battery assembly 32 is charged, the second voltage detection port 212 of the control chip 21 receives a voltage input, so that the control chip 21 knows that the battery assembly 32 is being charged, and then controls the third switch 233 and the fourth switch 234 to be in the on state, so that the motor 1 does not operate, and performs other corresponding coordination operations, including displaying the amount of electricity during the charging process.

As shown in fig. 1, the motor 1 is connected to the negative electrode of the battery assembly 32 in the power circuit 3 and then grounded, and the circuit between the motor 1 and the negative electrode of the battery assembly 32 is further connected to the power chip 35 and the sampling resistor 261; the sampling current collected by the sampling resistor 261 is transmitted to the power chip 35, and the control chip 35 obtains the effective value and the instantaneous value of the current passing through the motor 1 through the sampling current to further judge the working condition of the motor 1, fig. 1 shows that the sampling current is transmitted to the control chip 21 and is also transmitted to the power chip 35, which means that the power chip 35 and the control chip 21 participate in judging the working condition of the motor 1 together, so as to play a role of double protection, and the process of judging the working condition of the motor 1 by the control chip 21 has been elaborated in the above embodiment, and is not described herein again.

Since the puncture needle assembled by the motor 1 can cause serious damage to the tissue in the marrow cavity of the patient if the puncture needle still continues to operate after penetrating through the bone tissue into the marrow cavity, the puncture needle needs to be controlled to stop rotating immediately after penetrating through the bone tissue into the marrow cavity. In view of this, because the loads applied to the puncture needle by the bone tissue and the marrow cavity are different, the puncture needle will be empty after penetrating the bone tissue and entering the marrow cavity, i.e. the load torque will drop suddenly, and correspondingly the effective value of the current passing through the motor 1 will drop suddenly. Specifically, the power chip 35 obtains an effective value of the current passing through the motor 1, and detects whether the effective value of the current passing through the motor 1 is smaller than the no-load current threshold and lasts for a set time length, so that when the effective value of the current passing through the motor 1 is smaller than the no-load current threshold and lasts for the set time length, the power chip 35 controls the fifth switch 361 to be in a disconnected state, so that a circuit loop corresponding to the motor 1 is disconnected, and the motor 1 stops running; or, the control process is implemented by the control chip 21, specifically, the control chip 21 obtains an effective value of the current passing through the motor 1, and controls two poles of the motor 1 to be grounded when the effective value of the current passing through the motor 1 is smaller than a no-load current threshold and lasts for a set time length, so that the motor 1 stops operating within a preset time length.

In another embodiment, when the puncture needle assembled with the motor 1 encounters a hard tissue during the bone drilling process, such as a prosthesis, an implant, etc. of a patient, the puncture needle cannot continuously drill into the hard tissue, so that the power of the motor 1 suddenly increases, the effective value of the current passing through the motor 1 suddenly increases, and the stalling phenomenon occurs. In order to avoid the problem that the motor 1 and the patient are injured due to the fact that the drilling is continuously attempted when the motor 1 is locked, the control chip 21 of the embodiment obtains the effective value of the current passing through the motor 1, and detects whether the effective value of the current passing through the motor 1 is larger than the overload current threshold and continuously sets the duration, so that when the effective value of the current passing through the motor 1 is larger than the overload current threshold and continuously sets the duration, the third switch 233 and the fourth switch 234 are controlled to be in the on state, the first electrode 11 and the second electrode 12 are respectively connected to the ground terminal 4, and the motor 1 is further stopped.

Alternatively, the overcurrent threshold is preferably 10 ± 1A, and the set time period is preferably not less than 0.8 s. The overload current threshold is defined as the maximum load current that the circuit of the bone drilling device can bear, and when the effective value of the current passing through the motor 1 exceeds the overload current threshold, the circuit is easily overloaded and damaged. Therefore, when the effective value of the current passing through the motor 1 is greater than the overload current threshold value and is continuously set for a long time, the current of the motor 1 is considered to be overloaded, which may be due to the above-mentioned stalling phenomenon, and the motor 1 is further controlled to stop running, thereby protecting the circuit of the bone drilling equipment, the motor 1 and the patient.

Alternatively, the set time period is preferably not less than 1s, and further preferably, the set time period is preferably not less than 0.8 s. That is, the phenomenon of the sudden decrease of the effective value of the current passing through the motor 1 lasts for at least a set time period, and the puncture needle assembled with the motor 1 can be considered to have a falling phenomenon. The set time duration is set as above, which is beneficial to improving the accuracy of judging the working condition of the motor 1.

In another embodiment, the power chip 35 obtains an instantaneous value of the current passing through the motor 1, and detects whether the instantaneous value of the current passing through the motor 1 is greater than the short-circuit current threshold, so that when the instantaneous value of the current passing through the motor 1 is greater than the short-circuit current threshold, the power chip 35 controls the fifth switch 361 to be in the open state, so as to open the circuit loop corresponding to the motor 1, and further stop the operation of the motor 1. Or, the control process is implemented by the control chip 21, specifically, the control chip 21 obtains an instantaneous value of the current passing through the motor 1, and controls two poles of the motor 1 to be grounded when the instantaneous value of the current passing through the motor 1 is greater than a short-circuit current threshold value, so that the motor 1 stops operating within a preset time period.

Whether the instantaneous value of the current passing through the motor 1 is larger than the short-circuit current threshold value is probably that a large current is generated due to the short circuit of a part of the circuit of the motor 1, and the short circuit is controlled to be formed in time so as to control the motor 1 to stop running, so that the damage of the motor 1 due to the short circuit can be effectively avoided.

In one embodiment of the present application, the bone drill apparatus further comprises an analysis circuit 26, and the circuit between the motor 1 and the negative electrode of the battery assembly 32 in the power circuit 3 is connected to the control chip 21 through the analysis circuit 26 to transmit the sampling current to the control chip 21 through the analysis circuit 26.

As shown in fig. 1 and 3, the analysis circuit 26 includes an op-amp circuit 262. The operational amplifier circuit 262 is connected between the control chip 21 and the first electrode 11 or the second electrode 12 of the motor 1, and the sampling current I _ sampling is converted into an effective value I _ bus of current through the operational amplifier circuit 262 and transmitted to the control chip 21, so that the control chip 21 obtains the effective value of current through the motor 1.

Further, when the effective value of the current passing through the motor 1 is smaller than the no-load current threshold value and is continuously set, the control chip 21 stops the operation of the motor 1, the set time is preferably not smaller than 1s, that is, the phenomenon that the effective value of the current passing through the motor 1 suddenly decreases lasts at least for the set time, and it can be considered that the puncture needle assembled by the motor 1 is empty, and the set time is set, which is favorable for improving the accuracy of judging the working condition of the motor 1.

As shown in fig. 1 and 4, the analysis circuit 26 further includes a filter circuit 263. The filter circuit 263 is connected between the control chip 21 and the first electrode 11 or the second electrode 12 of the motor 1, and the sampled current I _ sampling is converted into an instantaneous value I _ trip of the current by the filter circuit 263 and transmitted to the control chip 21. Further, a comparator (not shown) is arranged in the control chip 21, the comparator is connected with the first electrode 11 or the second electrode 12, and the current passing through the motor 1 is transmitted to the comparator, so that the control chip 21 acquires an instantaneous value I _ trip of the current passing through the motor 1, when an instantaneous large current is caused by a short circuit, the instantaneous value I _ trip of the current enters the comparator to generate a hardware interrupt, and the control chip 21 can respond to make an adjustment in time. The input terminals of the filter circuit 263 are connected to the second voltage providing terminal 243, and the detailed circuit principle thereof is not described herein.

Specifically, the control chip 21 obtains the instantaneous value of the current passing through the motor 1, and detects whether the instantaneous value of the current passing through the motor 1 is greater than the short-circuit current threshold, so that when the instantaneous value of the current passing through the motor 1 is greater than the short-circuit current threshold, the control chip 21 controls the third switch 233 and the fourth switch 234 to be in a conducting state, and the first electrode 11 and the second electrode 12 are respectively connected to the ground terminal 4, thereby stopping the operation of the motor 1. Whether the instantaneous value of the current passing through the motor 1 is larger than the short-circuit current threshold value is probably that a large current is generated due to the short circuit of a part of the circuit of the motor 1, and the short circuit is controlled to be formed in time so as to control the motor 1 to stop running, so that the damage of the motor 1 due to the short circuit can be effectively avoided.

As shown in fig. 1 and 5, the bone drill apparatus further includes a heat sensitive element 37, the heat sensitive element 37 is disposed near the battery assembly 32 to reflect the current temperature of the battery assembly 32, the control circuit obtains the current temperature of the battery assembly 32 reflected by the heat sensitive element 37 during the use of the bone drill apparatus, and controls the two poles of the motor 1 to be grounded when the current temperature of the battery 321 in the battery assembly 32 is greater than a temperature threshold value, so that the motor 1 does not operate. The thermal sensor 37 can monitor the temperature of the battery 321 in the battery assembly 32 in real time, so as to avoid the damage of the battery 321 in the battery assembly 32 caused by the over-high temperature of the battery 321 in the battery assembly 32 during the use of the bone drill.

Specifically, in one embodiment, the thermal sensitive element 37 is preferably a thermistor, and may be a positive thermal sensitive resistor or a negative thermal sensitive resistor, and the like, the resistance of the thermal sensitive element 37 is affected by the temperature, the thermal sensitive element 37 is connected to the power chip 35, the thermal sensitive element 37 feeds back the sensed temperature of the battery 321 in the battery assembly 32 to the power chip 35, the power chip 35 determines whether the current temperature of the battery assembly 32 is greater than a temperature threshold value during the use of the bone drill, and the power chip 35 controls the fifth switch 361 to be in an off state when the current temperature of the battery assembly 32 is greater than the temperature threshold value, so that the circuit loop corresponding to the motor 1 is opened, and the motor 1 stops operating.

Optionally, the temperature threshold is preferably 70 ℃ during the use of the bone drill, and when the current temperature of the battery assembly 32 is greater than the temperature threshold during the use of the bone drill, the current temperature of the battery assembly 32 is considered to be too high, which is required to prevent the battery assembly 32 from continuing to discharge with high power, i.e., to control the motor 1 not to operate, so as to reduce the temperature of the battery assembly 32 and play a role in protecting the battery 321 in the battery assembly 32.

In an alternative embodiment, the thermosensitive element 37 may be further connected to the control chip 21, the thermosensitive element 37 feeds back the sensed temperature of the battery 321 in the battery assembly 32 to the control chip 21, the control chip 21 determines whether the current temperature of the battery assembly 32 is greater than a temperature threshold value during the use of the osteotome, and when the current temperature of the battery assembly 32 is greater than the temperature threshold value, the control chip 21 controls the third switch 233 and the fourth switch 234 to be in the on state, and the first electrode 11 and the second electrode 12 are respectively connected to the ground terminal 4, so as to stop the operation of the motor 1, as shown in fig. 6.

When the external power supply 7 charges the battery pack 32, the power chip 35 controls the sixth switch 362 to be turned on, so that the first charging terminal 331 receives the power from the external power supply 7 and supplies the power to the battery pack 32 for charging; when the current temperature of the battery assembly 32 reflected by the thermistor 37 exceeds 55 ℃, the power chip 35 controls the sixth switch 362 to be turned off, so as to avoid the adverse effect of the over-high temperature of the battery assembly 32 on the battery 321 in the battery assembly 32 during the charging process.

Further, as shown in fig. 1, 2 and 7, the control chip 21 is provided with a first steering port 213 and a second steering port 214, and the first steering port 213 and the second steering port 214 are respectively connected to a preset potential. The steering selection circuit 8 includes a steering selection switch 81, a first end of the steering selection switch 81 is grounded, and a second end of the steering selection switch 81 is used for connecting the first steering port 213 or the second steering port 214 of the control chip 21, so that the first steering port 213 or the second steering port 214 is grounded. Since the preset potential is higher than the potential of the first terminal of the steering selection switch 81, the first steering port 213 or the second steering port 214 is grounded, that is, the potential of the first steering port 213 or the second steering port 214 is pulled down, and thus the first steering signal or the second steering signal is generated.

The control chip 21 always detects the electric potentials of the first steering port 213 and the second steering port 214. When the user does not select the operation steering of the motor 1, the second terminal of the steering selection switch 81 is not connected to the first steering port 213 and the second steering port 214, the first steering port 213 and the second steering port 214 are both at the preset potential, and the control chip 21 does not generate the first steering signal and the second steering signal. When the user selects that the operation direction of the motor 1 is the first operation direction, the user operates the second end of the direction-changing selection switch 81 to connect with the first direction-changing port 213, so that the first direction-changing port 213 is grounded, at this time, the control chip 21 detects that the first direction-changing port 213 is at a low potential, the control chip 21 generates a first direction-changing signal, and the motor 1 operates in the first operation direction. When the user selects that the operation steering of the motor 1 is the second operation steering, the user operates the second end of the steering selection switch 81 to connect with the second steering port 214, so that the second steering port 214 is grounded, at this time, the control chip 21 detects that the second steering port 214 is at a low potential, and then the control chip 21 generates a second steering signal, and the motor 1 operates in the second operation steering. When the control chip 21 detects that the first steering port 213 and the second steering port 214 are both at the preset potential, the control chip 21 controls the third switch 233 and the fourth switch 234 to be in a conducting state, so that the first electrode 11 and the second electrode 12 are grounded respectively, and the motor 1 does not operate.

Further, the first steering port 213 and the second steering port 214 are respectively connected to the power circuit 3, so that when the power circuit 3 supplies power to the bone drilling device, the first steering port 213 and the second steering port 214 are at a preset potential, i.e., the first steering port 213 and the second steering port 214 of the control chip 21 have a voltage input with a high potential. Specifically, the first steering port 213 and the second steering port 214 are connected to the first voltage supply terminal 242 or the second voltage supply terminal 243 of the voltage conversion circuit 24, and are connected to the power supply circuit 3 through the voltage conversion circuit 24, so as to allow the power supply circuit 3 to be able to supply voltage inputs to the first steering port 213 and the second steering port 214. Fig. 7 illustrates only the case where the first and

second steering ports

213 and 214 are connected to the second voltage supply terminal 243, but of course, the first and

second steering ports

213 and 214 may be connected to the first voltage supply terminal 242 in other embodiments of the present application.

Further, the first steering port 213 and the second steering port 214 are preferably connected to the same voltage providing terminal, that is, they can be connected to the first voltage providing terminal 242 and can also be connected to the second voltage providing terminal 243, which is advantageous for simplifying the circuit structure design of the bone drilling device and simplifying the logic for detecting the electric potential of the first steering port 213 and the second steering port 214 by the control chip 21.

As shown in fig. 7, the steering selection switch 81 further includes a control terminal 811, and the control terminal 811 allows a user to operate so as to connect the second terminal of the steering selection switch 81 to the first steering port 213, connect the second steering port 214, or suspend the second terminal of the steering selection switch 81.

Further, as shown in fig. 8, the steering selection switch 81 is exposed to the outside of the housing of the bone drill apparatus, and the steering selection switch 81 further has three shift positions corresponding to the first running steering, the second running steering and the float, respectively, to indicate the running steering of the motor 1 or control the motor 1 not to run.

Specifically, the control terminal 811 allows the user to manipulate to one of three positions, which enables the motor 1 to operate and steer or to hang up and lock the bone drill device (i.e., to control the motor 1 not to operate). Wherein, the control terminal 811 is at the shift position corresponding to the first operation steering, which means that the second terminal of the steering selection switch 81 is connected to the first steering port 213, so that the first steering port 213 is grounded and is at a low potential; the control terminal 811 is in the shift position corresponding to the second operation steering means that the second terminal of the steering selection switch 81 is connected to the second steering port 214, so that the second steering port 214 is grounded and thus at a low potential; the control terminal 811 is in the corresponding floating gear position, which means that the second terminal of the steering selection switch 81 is not connected to the first steering port 213 and the second steering port 214, and the first steering port 213 and the second steering port 214 are both at the preset potential.

Based on the above, the process of using the bone drill device provided by the present embodiment may be as follows: firstly, a power switch 5 described below is closed and turned on, and the first power input end 22 supplies power to the control chip 21, so that the control chip 21 is powered on and detects potentials of the first steering port 213 and the second steering port 214; then, the user operates the control terminal of the steering selection switch 81 to select the operation steering of the motor 1, and the control chip 21 generates a corresponding steering signal accordingly to control the conduction of the power supply path between the first power input terminal 22 and the motor 1, so that the motor 1 operates in the operation steering selected by the user. And then the power switch 5 is switched off or the control end is controlled to be in a suspended gear, so that the motor 1 is controlled to stop running.

As shown in fig. 8, the bone drill device further comprises a power display circuit 9, wherein the power display circuit 9 comprises a plurality of indicator lights 91 for indicating the remaining power of the bone drill. Specifically, each indicator lamp 91 is preferably an LED lamp or the like, and each indicator lamp 91 is connected to a different port of the control chip 21, and the control chip 21 controls whether each indicator lamp 91 emits light or not, or controls the light emitting state (including blinking or the like) of the indicator lamp 91.

Specifically, the power display circuit 9 includes 3 indicator lights 91, and each indicator light 91 is connected to a different port of the control chip 21. When the remaining capacity of the bone drill is in different ranges, controlling the indicator lamps 91 with different numbers to emit light and/or controlling the indicator lamps 91 to be in different light-emitting states to represent the remaining capacity of the bone drill. Fig. 1 and 8 illustrate the case where the power display circuit 9 includes a first indicator lamp 911, a second indicator lamp 912 and a third indicator lamp 913, and the remaining power of the bone drill is represented by the current voltage of the battery assembly 32 (i.e., the battery assembly 32 explained in the above embodiment).

For example, when the battery assembly 32 is in a discharge state, the current voltage of the battery assembly 32 is equal to or greater than 11.3V, and the first indicator light 911, the second indicator light 912 and the third indicator light 913 are all turned on; the current voltage of the battery assembly 32 is less than or equal to 10.7V and less than 11.3V, and the first indicator lamp 911 and the second indicator lamp 912 are normally on correspondingly; the current voltage of the battery assembly 32 is less than or equal to 9.9V and less than 10.7V, and the corresponding first indicator lamp 911 is normally on; the current voltage of the battery assembly 32 is less than 9.9V, which corresponds to the first indicator lamp 911 flashing.

When the battery assembly 32 is in the charging state, the current voltage of the battery assembly 32 is greater than or equal to 12.6V, and the corresponding first indicator lamp 911, the second indicator lamp 912 and the third indicator lamp 913 are all on; the current voltage of the battery assembly 32 is less than or equal to 11.3V and less than 12.6V, and the first indicator lamp 911, the second indicator lamp 912 and the third indicator lamp 913 flicker correspondingly; the current voltage of the battery assembly 32 is less than or equal to 10.7V and less than 11.3V, and the first indicator lamp 911 and the second indicator lamp 912 flicker correspondingly; the current voltage of the battery assembly 32 is less than 10.7V, corresponding to the first indicator lamp 911 flashing.

As shown in fig. 9 and 10, fig. 10 omits a part of the housing on the basis of fig. 9 to expose the internal structure of the bone drill, and the bone drill device includes a housing 10 as a carrier for components such as the circuit of the bone drill, so that the bone drill is well adapted to the use of the surgical operation. The housing 10 is a main protection structure of the bone drill device, and the housing 10 serves as a carrier of components such as a circuit of the bone drill device and plays a role in protection. The casing 10 is usually formed into at least two parts which can be integrated into a whole by means of in-mold molding or injection molding, after components such as a circuit of the bone drill device are assembled, the at least two parts of the casing 10 are spliced to form the complete casing 10, and the fixing is realized by utilizing ultrasonic welding, so that the casing 10 has good sealing performance, and the bone drill device is well adapted to the use of a surgical operation.

Further, the motor 1 described above is provided in the housing 10, and the housing 10 exposes the drive end 13 of the motor 1. The motor 1 is used for assembling a puncture needle to perform bone drilling in a surgical operation, and the driving end 13 of the motor 1 can rotate around the self axial direction to further drive the puncture needle assembled on the driving end 13 to operate so as to perform the bone drilling. The driving end 13 of the motor 1 can be matched with various links to be assembled with various puncture needles, so that the bone drill equipment can be loaded with puncture needles of various forms to meet the requirements of surgical operations.

Further, the bone drilling equipment also comprises a reduction gearbox 14, and the reduction gearbox 14 is arranged at the driving end 13 of the motor 1 and plays a role in matching rotating speed and transmitting torque.

Further, the bone drilling equipment further comprises a first circuit board 101, the first circuit board 101 is arranged in the shell 10 of the bone drilling equipment and connected with the motor 1, and the first circuit board 101 is further arranged on the control circuit 2 connected with the motor 1 to control the operation of the motor 1.

The housing 10 is provided with a first slot 104 for mounting the first circuit board 101.

As shown in fig. 9 and 10, the bone drill device further includes a second circuit board 102 and a power switch 5, the second circuit board 102 is disposed in the housing 10 of the bone drill device and connected to the power switch 5 and the battery assembly 32, and the second circuit board 102 is provided with the power circuit 3 connected to the power switch 5 and the battery assembly 32, so that when the power switch 5 is turned on, the power circuit 3 and the control circuit 2 are turned on, and the electric energy of the battery assembly 32 is transmitted to the motor 1.

Further, in the bone drilling device, a second slot 105 is further provided in the housing, and the second circuit board 101 is mounted in the second slot 105.

Further, the housing 10 is further provided with a holding portion 103, the power switch 5 is disposed adjacent to the holding portion 103, and the user's finger can easily contact the power switch 5 to control the on and off of the power switch 5. Specifically, the power switch 5 is disposed in the area of the grip portion 103 that is accessible by the index finger of the user, so that the index finger of the user can easily contact the power switch 5 after the user's hand is held on the grip portion 103. The battery pack 32 is provided inside a portion of the housing 10 corresponding to the grip portion 103.

Further, the bone drill device further comprises a charging interface 38, the housing 10 exposes the charging interface 38, and the charging interface 38 is connected with a power circuit on the second circuit board 102.

Further, the bone drill device further comprises an indicator light group 914, the indicator light group 914 is connected with the control circuit, and the indicator light group 914 comprises a plurality of indicator lights 91 for indicating the remaining power of the bone drill device.

The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.

Claims

1. A bone drill apparatus, characterized in that the bone drill apparatus comprises:

a motor equipped with a puncture needle;

2. The bone drill apparatus of claim 1, further comprising: the steering selection circuit is used for generating a first steering signal and a second steering signal, the first steering signal and the second steering signal correspond to the operation steering of the motor and are respectively a first operation steering and a second operation steering, and the first operation steering is different from the second operation steering.

3. Bone drilling device according to claim 2,

the bone drilling device further comprises a power circuit and a ground terminal;

4. Bone drill apparatus according to claim 3,

the control circuit further comprises a first switch, a second switch, a third switch and a fourth switch, the motor has a first electrode and a second electrode;

5. The bone drilling apparatus of claim 4, wherein the third switch and the fourth switch are in a conducting state when the control chip receives an emergency stop signal during the motor is turned in the first operation or the second operation, and the first electrode and the second electrode are respectively connected to the ground terminal, so that the motor stops operating within a preset time period.

6. Bone drill device according to claim 3 or 4 or 5,

the power supply circuit also comprises a battery component, a power supply chip and an electric energy output end,

7. Bone drill apparatus according to claim 6,

the power supply circuit further comprises a fifth switch, wherein the first end of the fifth switch is grounded, the second end of the fifth switch is connected with the motor, and the control end of the fifth switch is connected with the power supply chip;

when the power switch is in a conducting state and the voltage of at least part of batteries in the battery assembly is not in the voltage threshold range of the single battery, the fifth switch is in a disconnecting state, so that a circuit loop corresponding to the motor is disconnected, and the motor is not operated;

the power circuit further comprises a first charging terminal and a second charging terminal, wherein the first charging terminal is connected with the positive electrode of the battery assembly and is also used for being connected with the positive electrode of an external power supply so as to transmit electric energy from the external power supply to the battery assembly for charging, and the second charging terminal is grounded.

8. The bone drill apparatus of claim 7, wherein the control circuit further comprises a second power input connected to the power output and the control chip, respectively, for transmitting power from the power output to the control chip when the power switch is turned off.

9. Bone drill apparatus according to claim 8,

the power supply circuit further comprises a first conducting switch and a second conducting switch,

10. Bone drill device according to claim 9,

the power supply circuit further comprises a sixth switch, a control end of the sixth switch is connected with the power supply chip, a first end of the sixth switch is connected with the first charging end, and a second end of the sixth switch is connected with the anode of the battery component;

when the battery assembly is charged, the sixth switch is in a conducting state; after the battery assembly is charged, the sixth switch is in an off state;

the power supply circuit further comprises a one-way conduction element, and the one-way conduction element is connected between a connection point of the power supply chip and the anode of the battery pack and the second end of the sixth switch so as to prevent current from flowing back to the second end of the sixth switch from the anode of the battery pack.

11. Bone drill device according to claim 3 or 4 or 5,

the motor is connected with the negative electrode of the power circuit and then grounded, and a circuit between the motor and the negative electrode of the power circuit is also connected with the control chip and the sampling resistor;

12. The bone drill apparatus of claim 11, further comprising an analysis circuit through which a circuit between the motor and the negative pole of the power circuit is connected to the control chip to transmit a sampled current to the control chip through the analysis circuit;

and/or the analysis circuit comprises an operational amplifier circuit, the operational amplifier circuit is connected between the control chip and the first electrode or the second electrode, and the sampling current is converted into an effective value of current through the operational amplifier circuit and is transmitted to the control chip;

and/or, the analysis circuit further comprises a filter circuit, the filter circuit is connected between the control chip and the first electrode or the second electrode, and the sampling current is converted into an instantaneous value of the current through the filter circuit and is transmitted to the control chip;

and/or a comparator is arranged in the control chip, is connected with the first electrode or the second electrode, and transmits the current passing through the motor to the comparator so as to detect whether the instantaneous value of the current passing through the motor is larger than the short-circuit current threshold value or not.

13. Bone drill device according to claim 3 or 4 or 5,

the control chip is provided with a first steering port and a second steering port, and the first steering port and the second steering port are respectively connected to a preset potential;

14. The bone drill apparatus of claim 13, wherein the steering selector switch further comprises a control terminal that allows a user to manipulate to connect the second end of the steering selector switch to the first steering port, or to connect the second steering port, or to float the second end of the steering selector switch; the steering selection switch is exposed out of the housing of the bone drill apparatus, and has three shift positions respectively corresponding to a first running steering, a second running steering and a floating gear to indicate the running steering of the motor or control the motor not to run.

15. The bone drilling apparatus of claim 6, further comprising a thermal element disposed proximate the battery assembly to reflect a current temperature of the battery assembly, the control circuit obtaining the current temperature of the battery assembly reflected by the thermal element during use of the bone drilling apparatus and controlling both poles of the motor to ground when the current temperature of the battery assembly is greater than a temperature threshold, whereby the motor is inoperative.

16. The bone drill apparatus of any one of claims 1 to 5, further comprising a first circuit board, a second circuit board and a power switch, wherein the first circuit board is disposed in a housing of the bone drill apparatus and connected to the motor, and the first circuit board is further disposed on the control circuit connected to the motor to control the motor to operate; the second circuit board is arranged in a shell of the bone drilling equipment and connected with the power switch and the battery pack, the second circuit board is provided with a connection part for connecting the power switch and the battery pack, so that the power switch is switched on when being switched on, the power circuit is switched on with the control circuit, and the electric energy of the battery pack is transmitted to the motor.

17. The bone drill device of claim 16, further comprising a charging interface, the housing exposing the charging interface arrangement, and the charging interface being connected to the power circuit on the second circuit board.

18. The bone drill device of any one of claims 1 to 5, further comprising an indicator light set connected to the control circuit, the indicator light set comprising a plurality of indicator lights for indicating a remaining power of the bone drill device.