CN103561514A - Thoracic cavity minimally-invasive surgery lamp block, single-lamp device, double-lamp device and using methods of three parts - Google Patents
Thoracic cavity minimally-invasive surgery lamp block, single-lamp device, double-lamp device and using methods of three parts Download PDFInfo
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- CN103561514A CN103561514A CN201310526882.0A CN201310526882A CN103561514A CN 103561514 A CN103561514 A CN 103561514A CN 201310526882 A CN201310526882 A CN 201310526882A CN 103561514 A CN103561514 A CN 103561514A
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Abstract
The invention discloses a thoracic cavity minimally-invasive surgery lamp block which comprises a power supply and a circuit board. Circuits of the circuit board comprise complementation double steady-state circuits and a constant current source circuit. The invention further discloses a using method of the thoracic cavity minimally-invasive surgery lamp block, a single-lamp device for the thoracic cavity minimally-invasive surgery lamp block, a using method of the single-lamp device, a double-lamp device for the thoracic cavity minimally-invasive surgery lamp block and a using method of the double-lamp device. Size is small, and brightness is constant.
Description
Technical field
The present invention relates to thoracic cavity Minimally Invasive Surgery technical field, be specifically related to a kind of thoracic cavity Minimally Invasive Surgery lamp piece, single lamp device and two lamp device and three's using method.
Background technology
The large otch in outside from the disconnected rib of tradition, to the modified incision that retains chest muscle, then to the thoracoscopic operation of the beginning of this century, thoracic cavity minimal invasive techniques is advanced by leaps and bounds.The patient who accepts thoracoscopic operation not only recovers soon, few intercurrent disease and can shorten the hospital stays, and it can improve 5 years survival rates of the early stage of lung cancer to also have part bibliographical information.Along with chamber mirror rapid technological improvement, the number of thoracic cavity perforate also develops into 3 holes by 4 original holes, and the doctor of minority fine craftsmanship even can accomplish 2 hole operations.And single hole operation only needs a hole just can complete operation (chamber mirror is also in same hole), wound will be less, be a developing direction of following minimally invasive surgery.
Thoracoscopic operation has some problems to be solved at present: execute patient's wrist and naturally droop when function digit, to otch upper end, utilize less; After handle hole reduces, attractor cannot be fixed in thoracic cavity, causes smog cannot discharge in time the operation process that affect, and indirectly makes and execute patient and take in more waste gas; Operation light is subject to otch restriction cannot meet thoracic cavity intraoral illumination needs, often using thoracoscope as secondary light source, but the high light of single light source has potential inpairment of vision to patient; Due to patient's the direct-view visual field and the difference of thoracoscope camera lens existence height and angle, long to the learning curve of Minimally Invasive Surgery transition by traditional operation under two-dimensional condition.
Therefore, be necessary existing thoracic cavity Wicresoft equipment to improve.
Summary of the invention
The deficiency that the present invention exists in order to overcome above prior art, provides that a kind of volume is little, the thoracic cavity Minimally Invasive Surgery lamp piece of brightness constancy.
The second object of the present invention is to provide the using method of a kind of thoracic cavity Minimally Invasive Surgery lamp piece.
The 3rd object of the present invention is to provide single lamp device of this thoracic cavity Minimally Invasive Surgery lamp piece of a kind of application.
The 4th object of the present invention is to provide a kind of using method of single lamp device, is applicable to small-sized thoracic cavity Minimally Invasive Surgery.
The 5th object of the present invention is to provide two lamp devices of this thoracic cavity Minimally Invasive Surgery lamp piece of a kind of application.
The 6th object of the present invention is to provide the using method of a kind of pair of lamp device, is applicable to thoracic cavity Minimally Invasive Surgery.
Object of the present invention realizes by following technical scheme: this thoracic cavity Minimally Invasive Surgery lamp piece, comprise power supply and circuit board, and the circuit of described circuit board comprises:
Complementary bistable circuit: comprise switch S 1, switch S 2, resistance R 1, resistance R 2, resistance R 4, resistance R 5, resistance R 7, resistance R 10, resistance R 11, transistor Q2, transistor Q7 and field effect transistor Q1, transistor Q2 is PNP transistor, transistor Q7 is NPN transistor, power supply connects switch S 1 through resistance R 1 and resistance R 4, switch S 2 is in parallel with resistance R 11, resistance R 7 is connected between the collector electrode of transistor Q2 and the base stage of transistor Q7, resistance R 10 connects the collector electrode of transistor Q2, resistance R 5 connects the base stage of transistor Q2, resistance R 2 is connected between power supply and the collector electrode of transistor Q7, transistor Q2 base stage is by resistance R 1 sending and receiving emitter-base bandgap grading, transistor Q7 base stage is by resistance R 11 sending and receiving emitter-base bandgap gradings, field effect transistor Q1 source electrode connects the control utmost point by resistance R 2, matched pair transistor Q2 and transistor Q7 form complementary bistable, transistor Q2 and transistor Q7 are through triggering, alternately there are two stable states: conducting state and off-state,
Constant-current source circuit: comprise resistance R 3, resistance R 6, resistance R 8, accurate integrated regulator TL431, transistor Q3, transistor Q4, LED lamp D1 and LED lamp D2, transistor Q3 is PNP transistor, transistor Q4 is PNP transistor, accurate integrated regulator TL431, transistor Q3 and transistor Q4 form constant-current source, transistor Q3 and transistor Q4 are in parallel, LED lamp D1 connects the collector electrode of transistor Q3, LED lamp D2 connects the collector electrode of transistor Q4, field effect transistor Q1 connecting resistance R3, resistance R 3 meets accurate integrated regulator TL431, accurate integrated regulator TL431 connects power cathode, resistance R 6 connects the base stage of transistor Q3, resistance R 8 connects the base stage of transistor Q4.
Described power supply is lithium battery, and the capacity of lithium battery is 900mA/h, and voltage is 3.2～4.2V, lithium battery is positioned at the top of circuit board, lithium battery and circuit board carry out integral sealing encapsulation by butyronitrile, and transparent butyronitrile plastics guarantee that printing opacity guarantees again water resistance, 2 switches are light-touch botton switch, the voltage of accurate integrated regulator TL431 is voltage stabilizing 2.5V, and the colourity of LED lamp is warm white 42-46LM, and colour temperature is 2800-8000K, circuit board is for printing pcb board, and 2 LED lamps are positioned at the both sides of circuit board.
The voltage of lithium battery is 3.2～4.2V, is not constant, has therefore adopted accurate integrated regulator TL431, makes a concrete analysis of as follows:
When cell voltage is 4.2 volts, accurate integrated regulator TL431 the 1st, 2 pin voltages are 2.5 volts, the voltage that arrives transistor Q3, transistor Q4 base stage by current-limiting resistance R6, R8 remains unchanged substantially, and the electric current that flows to transistor Q3, Q4 base stage also remains unchanged substantially, according to transistorized operation principle, the electric current that flows through LED lamp is transistorized collector current Ic, its size is: Ic=Ib * β, β is transistorized multiplication factor (concerning each transistor, being constant substantially).
∵ Ib=v/R(Ib=base current, v=voltage of voltage regulation=2.5 volt, R=current-limiting resistance resistance)
∴Ic=Ib×β=v/R×β
∵ v=is constant 2.5 volts, β is constant,
The resistance of ∴ R determines that Ic is the electric current of LED lamp.
When cell voltage drops to 3.2 volts, because accurate integrated regulator TL431 the 1st, 2 pin voltages are still 2.5 volts, by above-mentioned analysis, the electric current of LED lamp is still definite value, irrelevant with cell voltage.
When lithium battery, depress while dropping to lower than 3.2 volts, lithium battery interior protective circuit works, and stops using.
The using method of above-mentioned thoracic cavity Minimally Invasive Surgery lamp piece, comprises following three kinds:
(1) switch S 1 and switch S 2 are in open position: transistor Q2 base stage is by resistance R 1 sending and receiving emitter-base bandgap grading, and transistor Q2, in cut-off state, disconnects between collector electrode and emitter; Transistor Q7 base stage is by resistance R 11 sending and receiving emitter-base bandgap gradings, and transistor Q7, in cut-off state, also disconnects between collector electrode and emitter; Field effect transistor Q1 source electrode connects the control utmost point by resistance R 2, controls the utmost point in high potential, between source electrode and collector electrode, disconnects, and whole circuit is obstructed;
(2) transient switching switch S 1, transistor Q2 base stage is by resistance R 4 transient earthings, collector electrode and emitter saturation conduction, power supply connects transistor Q7 base stage by transistor Q2, resistance R 7, make also saturation conduction of the collector electrode of transistor Q7 and emitter, transistor Q7 conducting makes transistor Q2 base earth, maintained the conducting state of transistor Q2, therefore also maintained the conducting state of transistor Q7, whole process is positive feedback, completes and keep the stable state of two transistor Q2 and Q7 conducting simultaneously in a flash;
Simultaneously because transistor Q7 conducting, field effect transistor Q1 controls utmost point ground connection, in electronegative potential, between source electrode and collector electrode, connect, power supply is to constant-current source module for power supply, and this is second stable state, and accurate integrated regulator TL431, transistor Q3 and transistor Q4 form constant-current source, LED lamp D1 and LED lamp D2 are worked under constant current, not with mains voltage variations;
(3) transient switching switch S 2, transistor Q7 base stage transient earthing, exit saturatedly, transistor Q7 becomes cut-off, and transistor Q2 base stage loses path over the ground, exit the saturated cut-off that becomes, whole process is also positive feedback, in the stable state that completes and keep two transistor Q2 and Q7 to end in a flash simultaneously, gets back to static state, circuit reset, whole circuit is obstructed.
The single lamp device that uses thoracic cavity Minimally Invasive Surgery lamp piece, comprises lamp piece, fixed edge and active edges, and fixed edge is L shaped, and active edges is hook-type, described lamp piece be fixed on fixed edge below, the top of active edges and fixed edge is hinged.
The anglec of rotation of described active edges and fixed edge is-90 ° to 90 °, and the material of fixed edge and active edges is metal, and the length of lamp piece is 50mm, and width is 14mm, and the height of fixed edge is 45mm, and lamp piece and fixed edge are bonding.
The using method of above-mentioned single lamp device; comprise the steps: after the otch of small-sized thoracic cavity Minimally Invasive Surgery is held successfully; active edges half-twist; touch-switch S1 opens 2 LED lamps, lamp piece is tilted to put into otch and set level afterwards, and active edges resets; active edges clips health outer skin; single lamp device location, puts into incision protective sleeve, direct-view operation under the illumination of LED lamp.
Use two lamp devices of above-mentioned thoracic cavity Minimally Invasive Surgery lamp piece, comprise 2 lamp pieces, Y tube, clamping plate, spring and suction tubes, described 2 lamp pieces are connected with the lower end of Y tube by torsion spring respectively, plywood sleeve is on Y tube, spring upper end heads on the bulge loop of Y tube, lower end heads on clamping plate, and suction tube is socketed in wherein one end of Y tube top, and the other end can be built-in for the auxiliary crooked scope of observing.
The using method of two lamp devices of above-mentioned thoracic cavity Minimally Invasive Surgery lamp piece, comprise the steps: after the otch of thoracic cavity Minimally Invasive Surgery is held successfully, touch-switch S1 opens 2 LED lamps, press down two side lamp pieces makes it to be rotated down 90 ° and draws close simultaneously, vertically insert otch, enter the lamp block reset that comes up after thoracic cavity, spring heads on clamping plate, clamping plate are fixed on skin surface, direct-view operation under the illumination of LED lamp, suction tube is derived operation waste gas and intrathoracic steam, and the image collecting by scope is amplified and shown by external-connection displayer, for patient's reference.
The present invention has advantages of as follows with respect to prior art:
1, for meeting requirements of operation, this thoracic cavity Minimally Invasive Surgery lamp piece circuit elements device adopts the paster encapsulation that volume is little, and volume is little, lightweight.Common mechanical switch cannot meet volume and weight requirement, therefore selects light-touch botton switch, diameter to only have 4 millimeters, 1.5 millimeters of height.
2, for meeting requirements of operation, it is hermetically sealed that this thoracic cavity Minimally Invasive Surgery lamp piece adopts butyronitrile transparent plastic to carry out, and sealing and light transmission are good.
3, for meeting requirements of operation, and this lamp piece is disposable product, and its operating time is also an important indicator, and this thoracic cavity Minimally Invasive Surgery lamp piece adopts energy large, and lightweight lithium battery is as power supply, and white light is highlighted, and output is balanced, and permanent light intensity reaches more than 5 hours.
4, transistor Q2, Q7 forms " complementary bistable " circuit, and power consumption at ordinary times approaches zero, guarantees that stand-by time reaches the several years.
5, because battery in use voltage can drop to 3.2 volts from 4.2 volts, if do not taken measures, lamplight brightness can change.Circuit right side is " constant-current source " circuit, accurate integrated regulator TL431 and transistor Q3, and Q4 forms constant-current source, in the critical field of cell voltage 3.2-4.2V, LED lamp D1 and LED lamp D2 is worked under constant current, and lamplight brightness is stable.
6, this lamp piece is created the necessary condition of the lower thoracic cavity of direct-view Minimally Invasive Surgery, uniform light and suitable brightness and colour temperature, make to look at straight lower thoracic cavity Minimally Invasive Surgery accomplished, the shared duct of mirror, tradition thoracoscopic operation chamber can change into inserts operating apparatus, reduce operating difficulty, set up new operative model, improve learning efficiency; Increase range of observation in art simultaneously, and effectively overcome traditional thoracoscopic operation high light wound eye and the long shortcoming of learning curve.
7, the present invention is directed to the different length otch causing due to dissect physiology and operation skill difference, single lamp device and two lamp devices are provided, can reduce misery and the hospital stays of sufferer.
8, the Y tube of two lamp devices design, is conducive to simplified structure, reduces cost and taking otch space, by luminous, observe duct, smoke discharging pipe is integrated as a whole, easy to use, reduce the impact of waste gases and smoke on surgical procedure and patient's health, power supply does not also have electromagnetic interference.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of thoracic cavity of the present invention Minimally Invasive Surgery lamp piece.
Fig. 2 is the front view of single lamp device.
Fig. 3 is the front view of single lamp device active edges half-twist.
Fig. 4 is the front views of two lamp devices when surgical state.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1:
As shown in Figure 1, thoracic cavity Minimally Invasive Surgery lamp piece, comprises power supply and circuit board, and the circuit of described circuit board comprises:
Complementary bistable circuit: comprise switch S 1, switch S 2, resistance R 1, resistance R 2, resistance R 4, resistance R 5, resistance R 7, resistance R 10, resistance R 11, transistor Q2, transistor Q7 and field effect transistor Q1, transistor Q2 is PNP transistor, transistor Q7 is NPN transistor, power supply connects switch S 1 through resistance R 1 and resistance R 4, switch S 2 is in parallel with resistance R 11, resistance R 7 is connected between the collector electrode of transistor Q2 and the base stage of transistor Q7, resistance R 10 connects the collector electrode of transistor Q2, resistance R 5 connects the base stage of transistor Q2, resistance R 2 is connected between power supply and the collector electrode of transistor Q7, transistor Q2 base stage is by resistance R 1 sending and receiving emitter-base bandgap grading, transistor Q7 base stage is by resistance R 11 sending and receiving emitter-base bandgap gradings, field effect transistor Q1 source electrode connects the control utmost point by resistance R 2, matched pair transistor Q2 and transistor Q7 form complementary bistable, transistor Q2 and transistor Q7 are through triggering, alternately there are two stable states: conducting state and off-state,
Constant-current source circuit: comprise resistance R 3, resistance R 6, resistance R 8, accurate integrated regulator TL431, transistor Q3, transistor Q4, LED lamp D1 and LED lamp D2, transistor Q3 is PNP transistor, transistor Q4 is PNP transistor, accurate integrated regulator TL431, transistor Q3 and transistor Q4 form constant-current source, transistor Q3 and transistor Q4 are in parallel, LED lamp D1 connects the collector electrode of transistor Q3, LED lamp D2 connects the collector electrode of transistor Q4, field effect transistor Q1 connecting resistance R3, resistance R 3 meets accurate integrated regulator TL431, accurate integrated regulator TL431 connects power cathode, resistance R 6 connects the base stage of transistor Q3, resistance R 8 connects the base stage of transistor Q4.
Described power supply is lithium battery, and the capacity of lithium battery is 900mA/h, and voltage is 3.2～4.2V, lithium battery is positioned at the top of circuit board, lithium battery and circuit board carry out integral sealing encapsulation by butyronitrile, and transparent butyronitrile plastics guarantee that printing opacity guarantees again water resistance, 2 switches are light-touch botton switch, the voltage of accurate integrated regulator TL431 is voltage stabilizing 2.5V, and the colourity of LED lamp is warm white 42-46LM, and colour temperature is 5000K, circuit board is for printing pcb board, and 2 LED lamps are positioned at the both sides of circuit board.
The using method of above-mentioned thoracic cavity Minimally Invasive Surgery lamp piece, comprises following three kinds:
(1) switch S 1 and switch S 2 are in open position: transistor Q2 base stage is by resistance R 1 sending and receiving emitter-base bandgap grading, and transistor Q2, in cut-off state, disconnects between collector electrode and emitter; Transistor Q7 base stage is by resistance R 11 sending and receiving emitter-base bandgap gradings, and transistor Q7, in cut-off state, also disconnects between collector electrode and emitter; Field effect transistor Q1 source electrode connects the control utmost point by resistance R 2, controls the utmost point in high potential, between source electrode and collector electrode, disconnects, and whole circuit is obstructed;
(2) transient switching switch S 1, transistor Q2 base stage is by resistance R 4 transient earthings, collector electrode and emitter saturation conduction, power supply connects transistor Q7 base stage by transistor Q2, resistance R 7, make also saturation conduction of the collector electrode of transistor Q7 and emitter, transistor Q7 conducting makes transistor Q2 base earth, maintained the conducting state of transistor Q2, therefore also maintained the conducting state of transistor Q7, whole process is positive feedback, completes and keep the stable state of two transistor Q2 and Q7 conducting simultaneously in a flash;
Simultaneously because transistor Q7 conducting, field effect transistor Q1 controls utmost point ground connection, in electronegative potential, between source electrode and collector electrode, connect, power supply is to constant-current source module for power supply, and this is second stable state, and accurate integrated regulator TL431, transistor Q3 and transistor Q4 form constant-current source, LED lamp D1 and LED lamp D2 are worked under constant current, not with mains voltage variations;
(3) transient switching switch S 2, transistor Q7 base stage transient earthing, exit saturatedly, transistor Q7 becomes cut-off, and transistor Q2 base stage loses path over the ground, exit the saturated cut-off that becomes, whole process is also positive feedback, in the stable state that completes and keep two transistor Q2 and Q7 to end in a flash simultaneously, gets back to static state, circuit reset, whole circuit is obstructed.
Embodiment 2:
As shown in Figures 2 and 3, use single lamp device of the thoracic cavity Minimally Invasive Surgery lamp piece of embodiment 1, comprise lamp piece 1, fixed edge 2 and active edges 3, fixed edge 2 is L shaped, active edges 3 is hook-type, lamp piece 1 be fixed on fixed edge 2 below, active edges 3 is hinged with the top of fixed edge 2.Active edges 3 is-90 ° to 90 ° with the anglec of rotation of fixed edge 2, and the material of fixed edge 2 and active edges 3 is metal, and the length of lamp piece 1 is 50mm, and width is 14mm, and the height of fixed edge 2 is 45mm, and lamp piece 1 is bonding with fixed edge 2.
The present embodiment adopts two single lamp devices, although function reduces relatively, otch is taken less, is suitable for little otch.
The using method of above-mentioned single lamp device, comprise the steps: after otch (length the is 3～4cm) incision at thoracic cavity Minimally Invasive Surgery, active edges half-twist, touch-switch S1 opens 2 LED lamps, after being tilted to put into upper end otch, lamp piece sets level, active edges resets, active edges is placed in skin surface, active edges and fixed edge are fixed single lamp device jointly, in order to guarantee enough brightness, therefore adopt 2 single lamp devices, in like manner insert single lamp device of other direction, now 2 single lamp devices and otch form T glyph shape.Then put into incision protective sleeve, direct-view operation under the illumination of LED lamp.
Embodiment 3:
As shown in Figure 4, use two lamp devices of the thoracic cavity Minimally Invasive Surgery lamp piece of embodiment 1, comprise 2 lamp pieces 1, Y tube 5, clamping plate 6, spring 7 and suction tube 8,2 lamp pieces 1 are connected with the lower end of Y tube 5 by torsion spring 9 respectively, clamping plate 6 are enclosed within on Y tube 5, and spring 7 upper ends head on the bulge loop 10 of Y tube 5, and lower end heads on clamping plate 6, suction tube 8 is socketed in wherein one end of Y tube 5 tops, and the other end can be built-in for the auxiliary crooked scope of observing.
The present embodiment adopts two lamp devices, otch is taken more, but can practical function more, applicable slightly long otch.
The using method of two lamp devices of above-mentioned thoracic cavity Minimally Invasive Surgery lamp piece, comprise the steps: after otch (length is greater than in the 4cm situation) incision at thoracic cavity Minimally Invasive Surgery, touch-switch S1 opens 2 LED lamps, press down two side lamp pieces makes it to be rotated down 90 ° and draws close simultaneously, vertically insert otch, enter the lamp block reset that comes up after thoracic cavity, spring heads on clamping plate, clamping plate are fixed on skin surface, and now 2 lamp pieces and otch form T glyph shape (being similar to 2 single lamp devices of embodiment 2 and the T glyph shape that otch forms).Direct-view operation under the illumination of LED lamp, suction tube is derived operation waste gas and intrathoracic steam, and the image collecting by scope is amplified and is shown by external-connection displayer, for patient's reference.
Above-mentioned embodiment is the preferred embodiments of the present invention, can not limit the present invention, and other any change or other equivalent substitute mode that does not deviate from technical scheme of the present invention and make, within being included in protection scope of the present invention.
Claims (8)
1. thoracic cavity Minimally Invasive Surgery lamp piece, is characterized in that: comprise power supply and circuit board, the circuit of described circuit board comprises:
Complementary bistable circuit: comprise switch S 1, switch S 2, resistance R 1, resistance R 2, resistance R 4, resistance R 5, resistance R 7, resistance R 10, resistance R 11, transistor Q2, transistor Q7 and field effect transistor Q1, transistor Q2 is PNP transistor, transistor Q7 is NPN transistor, power supply connects switch S 1 through resistance R 1 and resistance R 4, switch S 2 is in parallel with resistance R 11, resistance R 7 is connected between the collector electrode of transistor Q2 and the base stage of transistor Q7, resistance R 10 connects the collector electrode of transistor Q2, resistance R 5 connects the base stage of transistor Q2, resistance R 2 is connected between power supply and the collector electrode of transistor Q7, transistor Q2 base stage is by resistance R 1 sending and receiving emitter-base bandgap grading, transistor Q7 base stage is by resistance R 11 sending and receiving emitter-base bandgap gradings, field effect transistor Q1 source electrode connects the control utmost point by resistance R 2, matched pair transistor Q2 and transistor Q7 form complementary bistable, transistor Q2 and transistor Q7 are through triggering, alternately there are two stable states: conducting state and off-state,
Constant-current source circuit: comprise resistance R 3, resistance R 6, resistance R 8, accurate integrated regulator TL431, transistor Q3, transistor Q4, LED lamp D1 and LED lamp D2, transistor Q3 is PNP transistor, transistor Q4 is PNP transistor, accurate integrated regulator TL431, transistor Q3 and transistor Q4 form constant-current source, transistor Q3 and transistor Q4 are in parallel, LED lamp D1 connects the collector electrode of transistor Q3, LED lamp D2 connects the collector electrode of transistor Q4, field effect transistor Q1 connecting resistance R3, resistance R 3 meets accurate integrated regulator TL431, accurate integrated regulator TL431 connects power cathode, resistance R 6 connects the base stage of transistor Q3, resistance R 8 connects the base stage of transistor Q4.
2. thoracic cavity according to claim 1 Minimally Invasive Surgery lamp piece, it is characterized in that: described power supply is lithium battery, the capacity of lithium battery is 900mA/h, voltage is 3.2～4.2V, lithium battery is positioned at the top of circuit board, lithium battery and circuit board carry out integral sealing encapsulation by butyronitrile, 2 switches are light-touch botton switch, the voltage of accurate integrated regulator TL431 is voltage stabilizing 2.5V, the colourity of LED lamp is warm white 42-46LM, colour temperature is 2800-8000K, and circuit board is for printing pcb board, and 2 LED lamps are positioned at the both sides of circuit board.
3. the using method of thoracic cavity according to claim 1 Minimally Invasive Surgery lamp piece, is characterized in that: comprise following three kinds:
(1) switch S 1 and switch S 2 are in open position: transistor Q2 base stage is by resistance R 1 sending and receiving emitter-base bandgap grading, and transistor Q2, in cut-off state, disconnects between collector electrode and emitter; Transistor Q7 base stage is by resistance R 11 sending and receiving emitter-base bandgap gradings, and transistor Q7, in cut-off state, also disconnects between collector electrode and emitter; Field effect transistor Q1 source electrode connects the control utmost point by resistance R 2, controls the utmost point in high potential, between source electrode and collector electrode, disconnects, and whole circuit is obstructed;
(2) transient switching switch S 1, transistor Q2 base stage is by resistance R 4 transient earthings, collector electrode and emitter saturation conduction, power supply connects transistor Q7 base stage by transistor Q2, resistance R 7, make also saturation conduction of the collector electrode of transistor Q7 and emitter, transistor Q7 conducting makes transistor Q2 base earth, maintained the conducting state of transistor Q2, therefore also maintained the conducting state of transistor Q7, whole process is positive feedback, completes and keep the stable state of two transistor Q2 and Q7 conducting simultaneously in a flash;
Simultaneously because transistor Q7 conducting, field effect transistor Q1 controls utmost point ground connection, in electronegative potential, between source electrode and collector electrode, connect, power supply is to constant-current source module for power supply, and this is second stable state, and accurate integrated regulator TL431, transistor Q3 and transistor Q4 form constant-current source, LED lamp D1 and LED lamp D2 are worked under constant current, not with mains voltage variations;
(3) transient switching switch S 2, transistor Q7 base stage transient earthing, exit saturatedly, transistor Q7 becomes cut-off, and transistor Q2 base stage loses path over the ground, exit the saturated cut-off that becomes, whole process is also positive feedback, in the stable state that completes and keep two transistor Q2 and Q7 to end in a flash simultaneously, gets back to static state, circuit reset, whole circuit is obstructed.
4. right to use requires single lamp device of the thoracic cavity Minimally Invasive Surgery lamp piece described in 1, it is characterized in that: comprise lamp piece, fixed edge and active edges, fixed edge is L shaped, and active edges is hook-type, described lamp piece be fixed on fixed edge below, the top of active edges and fixed edge is hinged.
5. single lamp device according to claim 4, is characterized in that: the anglec of rotation of described active edges and fixed edge is-90 ° to 90 °, and the material of fixed edge and active edges is metal, the length of lamp piece is 50mm, width is 14mm, and the height of fixed edge is 45mm, and lamp piece and fixed edge are bonding.
6. the using method of single lamp device according to claim 4; it is characterized in that: comprise the steps: after the otch of small-sized thoracic cavity Minimally Invasive Surgery is held successfully; active edges half-twist; touch-switch S1 opens 2 LED lamps, lamp piece is tilted to put into otch and set level afterwards, and active edges resets; active edges clips health outer skin; single lamp device location, puts into incision protective sleeve, direct-view operation under the illumination of LED lamp.
7. right to use requires two lamp devices of the thoracic cavity Minimally Invasive Surgery lamp piece described in 1, it is characterized in that: comprise 2 lamp pieces, Y tube, clamping plate, spring and suction tubes, described 2 lamp pieces are connected with the lower end of Y tube by torsion spring respectively, plywood sleeve is on Y tube, spring upper end heads on the bulge loop of Y tube, lower end heads on clamping plate, and suction tube is socketed in wherein one end of Y tube top.
8. the using method of two lamp devices of thoracic cavity according to claim 7 Minimally Invasive Surgery lamp piece, it is characterized in that: comprise the steps: after the otch of thoracic cavity Minimally Invasive Surgery is held successfully, touch-switch S1 opens 2 LED lamps, press down two side lamp pieces makes it to be rotated down 90 ° and draws close simultaneously, vertically insert otch, enter the lamp block reset that comes up after thoracic cavity, spring heads on clamping plate, clamping plate are fixed on skin surface, direct-view operation under the illumination of LED lamp, suction tube is derived operation waste gas and intrathoracic steam, the image collecting by scope is amplified and is shown by external-connection displayer, for patient's reference.
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