CN2189448Y - Portable supersonic dental therapeutic instrument - Google Patents

Abstract

The utility model relates to a portable supersonic dental therapeutic instrument, which belongs to dental medical equipment, and can solve the existing disadvantages of imperfect liquid supply system, poor treatment effect, limited functions, inconvenient carrying, etc. of the present similar equipment. The utility model utilizes one special plug (10) to carry out electric circuit connection and mechanical linkage on an ultrasonic drive circuit and a liquid supply system with a transducer (11). The transducer (11) is provided with working nibs. Different goals of treatment can be achieved by changing different working tips. The utility model is used for tooth cleaning and dental treatments such as pulp canal therapy, periodontal therapy, silver amalgam filling, loosing prosthesis, etc.

Description

Portable supersonic dental therapeutic instrument

This utility model relates to a kind of dental care equipment, especially a kind of portable supersonic dentistry therapy instrument.

At present, in the ultrasonic therapy equipment of the department of stomatology, existing ultrasonic cavitron, the patent No. that goes up marine products is that domestic and international product such as 88204838.4 ultrasonic cavitron, the multifunction ultrasonic dentistry therapy instrument that the patent No. is 92207948.X is using, the operation principle of these machines is basic identical, be and use ultrasonic signal generator and amplify the rear drive transducer, realize therapeutic purposes by transducer drive work point then by power amplifier.

Above-mentioned therapeutic equipment exists following shortcoming: (1) does not have perfect liquid delivery system, installs and uses inconvenience, is not easy to carry; (2) supersonic generator can not be realized load matched resonance when treatment, and therapeutic effect is poor; (3) function is few; (4) miscellaneous function is incomplete.

The purpose of this utility model is at above-mentioned shortcoming, and a kind of portable supersonic dentistry therapy instrument that has overcome above-mentioned shortcoming is provided.

The purpose of this utility model is achieved in that in therapeutic instrument, be connected with liquid delivery system by compressed air source (1), the output of liquid delivery system is connected with plug (10) jointly with the outfan of ultrasonic drive circuit, plug (10) is connected with energy device (11), transducer (11) is provided with the work point, thereby realizes perfect liquid supply; The feedback branch that in ultrasonic drive circuit of the present utility model, is provided with feedback sample resistance R 23 in addition and forms by C22, L21, thus realize load matched resonance; This utility model has designed one group of removable work point, is respectively applied for different treatments, thereby realizes one-machine-multi-function, and this utility model has increased suction saliva device, and has increased the energy indicating circuit in ultrasonic drive circuit, has increased miscellaneous function thus.

The beneficial effect that this utility model had is: (1) is owing to have perfect liquid delivery system and plug special, therefore, instrument need not the peripheral hardware fluid reservoir, the compressed air piping air feed can be do not used, in treatment, required liquid can be changed apace, brought convenience for installing, use, safeguarding, for portable, can beyond hospital, use; (2) owing to have the supersonic generator that can realize load matched resonance, so power stability, therapeutic effect is good; (3) owing to having one group of work point, treatments such as therefore, different work points can clean one's teeth by changing, root canal, periodontal treatment, amalgum restoration, loosening dummy, multiple functional; (4) owing to have auxiliary circuits such as the saliva of suction device, energy indicating circuit and the automatic protection of liquid level warning, make allomeric function perfect especially, easy to use.

Concrete structure of the present utility model and circuit are born by following embodiment and accompanying drawing thereof:

Fig. 1 is the structural representation of first embodiment of the present utility model;

Fig. 2 is the structural representation of second embodiment of the present utility model;

Fig. 3 is the structural representation of the 3rd embodiment of the present utility model;

Fig. 4 is for inhaling the structural representation of saliva device;

Fig. 5 is the plug construction sketch map;

Fig. 6 is the side view of Fig. 5;

Fig. 7 is a kind of structural representation of work point;

Fig. 8 is the A of Fig. 7---the A profile;

Fig. 9 is the B of Fig. 7---the B profile;

Figure 10 is the C of Fig. 7---the C profile;

Figure 11 is the structural representation of another kind of work point;

Figure 12 is an electrical schematic diagram.

Below in conjunction with accompanying drawing, describe detail and working condition in detail according to the portable supersonic dentistry therapy instrument that the utility model proposes.

This utility model can be equipped with different liquid delivery systems according to different requirements, now is described below respectively:

A. first embodiment, the structure that is the single liquid supply system is seen Fig. 1, compressed air source (1) joins with pipeline (2) and fluid reservoir (3), join from the end of fluid reservoir (3) reuse pipeline (5) with electromagnetic valve (6), the other end of electromagnetic valve (6) joins with the end of pipeline (7) with flow control valve (8), the other end of flow control valve (8) joins with the end of pipeline (9) with plug (10), and the other end of plug (10) and transducer (11) directly join.Its operation principle is: the compressed air of being sent here by compressed air source (1), enter fluid reservoir (3) through pipeline (2), because compressed-air actuated effect, the liquid that stores in the fluid reservoir (3) is successively by pipeline (5), electromagnetic valve (6), pipeline (7), flow control valve (8), pipeline (9), plug special (10), deliver to transducer (11) at last, path (4) is used for to fluid reservoir (3) filling liquid, correspondent control circuits is seen Figure 12, between power supply E7 and common port, be connected in series electromagnetic valve (6) and K switch 4, the switching of electromagnetic valve (6) is by K switch 4 controls, when K4 is closed, electromagnetic valve (6) is opened, and transducer (11) can have liquid output, when K switch 4 disconnects, electromagnetic valve (6) cuts out, no liquid supply this moment;

B. second embodiment, that is: the supply system structure of two kinds of liquid is seen Fig. 2, compressed air source (1) joins with the end of pipeline (21) with three way cock (22), three way cock's (22) the other end joins with pipeline (23) and fluid reservoir (3), join from the end of fluid reservoir (3) reuse pipeline (5) with electromagnetic valve (6), the other end of electromagnetic valve (6) joins with the end of pipeline (28) with three way cock (35), three way cock (22) remains that end and joins with pipeline (29) and fluid reservoir (30), join from the end of fluid reservoir (30) reuse pipeline (32) with electromagnetic valve (33), the other end of electromagnetic valve (33) is connected to the other end of three way cock (35) with pipeline (34), three way cock (35) remains that end, join with the end of pipeline (36) with flow control valve (8), the other end of flow control valve (8), be connected to an end of plug (10) with pipeline (9), the other end of plug (10) and transducer (11) directly join.Its operation principle is: the compressed air of being sent here by compressed air source (1), deliver to threeway (22) through pipeline (21), be divided into two-way at this compressed air, one route pipeline (23) is sent into fluid reservoir (3), another route pipeline (29) is sent into fluid reservoir (30), the liquid that stores in the fluid reservoir (3), successively by pipeline (5), electromagnetic valve (6), send into three way cock (35) through pipeline (28) again, the liquid that stores in the fluid reservoir (30), successively by pipeline (32), electromagnetic valve (33), send into three way cock (35) through pipeline (34) again, from three way cock (35), liquid is successively through pipeline (36), flow control valve (8), pipeline (9), plug (10), deliver to transducer (11) at last, liquid feeding path (4), (31) be respectively applied for to fluid reservoir (3), (30) filling liquid in, correspondent control circuits is seen Figure 12, K switch 4 is connected between power supply E7 and the common port after connecting with electromagnetic valve (6) is electric, be connected between power supply E7 and the common port after K switch 5 is connected with electromagnetic valve (33) is electric and constitute, electromagnetic valve (6), (33) switching, by power supply E7 and K switch 4, K5 control, when power supply E7 powers, can be by K switch 4, K switch 5 is controlled electromagnetic valve (6) respectively, (33) switching, thereby make different liquid output is arranged in the transducer (11), when power supply E7 cuts off the power supply, electromagnetic valve (6), (33) all close, no liquid output in transducer this moment (11), (6), (33) two ends respectively and meet protection diode D409, D410;

C. the supply system structure that the 3rd embodiment can two kinds of liquid of Fast transforms is seen Fig. 3, compressed air source (1) joins with the end of pipeline (21) with three way cock (22), three way cock's (22) the other end joins with pipeline (23) and fluid reservoir (3), join from the end of fluid reservoir (3) reuse pipeline (5) with electromagnetic valve (6), the other end of electromagnetic valve (6) joins with the end of pipeline (58) with flow control valve (59), the other end of flow control valve (59) joins with pipeline (60) one of them input with plug (10), three way cock (22) remains that end and joins with pipeline (29) and fluid reservoir (30), join from the end of fluid reservoir (30) reuse pipeline (32) with electromagnetic valve (33), the other end of electromagnetic valve (33), join with the end of pipeline (66) with flow control valve (67), the other end of flow control valve (67) joins with pipeline (68) another input with plug (10), the outfan of plug (10), direct and transducer (11) joins.Its operation principle is: the compressed air of being sent here by compressed air source (1), deliver to threeway (22) through pipeline (21), at this, compressed air is divided into two-way, one route pipeline (23) is sent into fluid reservoir (3), another route pipeline (29) is sent into fluid reservoir (30), the liquid that stores in the fluid reservoir (3), successively by pipeline (5), electromagnetic valve (6), pipeline (58), flow control valve (59), send into plug (10) through pipeline (60) again, the liquid that stores in the fluid reservoir (30), successively by pipeline (32), electromagnetic valve (33), pipeline (66), flow control valve (67), send into plug (10) through pipeline (68) again, again liquid is sent into transducer (11) from plug (10), liquid feeding path (4), (31) be respectively applied for to fluid reservoir (3), (30) filling liquid in, correspondent control circuits is seen Figure 12, be connected between power supply E7 and the common port after connect by K switch 5 and electromagnetic valve (6) electricity, be connected between power supply E7 and the common port after K switch 5 is connected with electromagnetic valve (33) is electric and constitute.The switching of electromagnetic valve (6), (33) is by power supply E7 and K switch 4, K5 control, when power supply E7 powers, can control the open and close of electromagnetic valve (6), (33) by K switch 4, K5 respectively, thereby make different liquid output is arranged in the transducer (11), when power supply E7 cuts off the power supply, electromagnetic valve (6), (33) are all closed, no liquid output in transducer this moment (11), because two kinds of liquid are delivered to plug (10) by pipeline (60), (68) respectively, reduced the shared time of common conduit emptying, so it is very fast to change liquid;

In above-mentioned various liquid delivery systems, when compressed air source was air compressor, correspondent control circuits was seen Figure 12, when K switch J2 was closed, air compressor PI work produced compressed air this moment, when KJ2 disconnected, air compressor PI did not work, and E1 is a power supply.

The structure of plug is seen Fig. 5; contact electrode (82); (83); (84) left end respectively with the electric wire (77) of mutually insulated; (78); (79) welding; right-hand member is used for electrically connecting as plug-in type with transducer; flexible pipe (75); (76) portal with liquid (81) communicate; like this; flexible pipe (75); (76) liquid in can be exported from portal (81) at the same time or separately; to realize supplying required liquid to transducer; electric wire (77); (78); (79); flexible pipe (75); (76) all place in the protective sleeve (74); various terminal; bond sites; last all injection mouldings are in housing (80); the right-hand member of housing (80) is used for connecting as plug-in type with transducer; electric wire in the protective sleeve (74) is connected to the outfan of ultrasonic drive circuit, and the flexible pipe in the protective sleeve (74) is connected in the liquid delivery system.

The utlity model has a ultrasonic drive circuit, in electrical schematic diagram shown in Figure 12, the electrically connected method of ultrasonic drive circuit is as follows: behind capacitor C 23 and matching transformer T21 elementary in parallel, be connected between the drain electrode of power supply E4 and switching tube Q21, resistance R 22 is connected between the grid of power supply E4 and switching tube Q21, the source electrode of switching tube Q21 connects common port, matching transformer T21's is secondary, resistance R 23, transducer YD is the closed loop serial connection, the contact of resistance R 23 and transducer YD, link with common port, capacitor C 22 is with after inductance L 21 is connected, be connected between the contact of the grid of switching tube Q21 and matching transformer T21 and resistance R 23, and adjustable D.C. regulated power supply IC2, R21, C21, W21 and K switch J1 constitute; When K switch J1 is closed, circuit is started working, because the effect of resistance R 22, make power field effect audion Q21, obtain a bias voltage, audion Q21 conducting, there is electric current to pass through in matching transformer T21 elementary, obtain a positive feedback voltage from resistance R 23 simultaneously, feed back to the grid of audion Q21 via the feedback network of inductance L 21 and capacitor C 21 compositions, make audion Q21 conducting more, up to saturated, at this moment the feedback voltage on the audion Q21 grid descends, conducting electric current among the audion Q21 reduces, the feedback voltage that obtains on its grid is reverse, make it rapid shutoff, so far finish a cycle of oscillation, its frequency of oscillation is determined jointly by the characteristic and the load of transducer, moves in circles like this, and ultrasonic drive circuit works on the resonant frequency of transducer, when audion Q21 turn-offs, energy stored was to capacitor C 23 chargings during matching transformer was elementary, and after charging finished, capacitor C 23 was discharged to the primary coil of matching transformer T21 again, formation reverse current in coupling transformation T21 elementary, this reverse current is after capacitor C 23 discharges finish, again to capacitor C 23 chargings, up to electric current is zero, at this moment, audion Q21 begins conducting again, and capacitor C 23 is powered to matching transformer T21 with power supply, thereby, the efficient of transducer is very high, is that core is formed adjustable D.C. regulated power supply with IC 2, and potentiometer W21 is an energy conditioner, be used for regulating the E3 magnitude of voltage, to realize the adjusting and the control of transducer YD output.

Power field effect audion Q21 among Figure 12 can use the ambipolar NPN audion of power, and its operation principle is identical with use power field effect audion.

The utlity model has one group of work point, each work point all can with transducer with being threaded, be used for finishing specific treatment function, it is sharp now to introduce two kinds of special-purpose work:

A. periodontal treatment work point, its structure is seen Fig. 7, work and be connected with a smooth curved bar (102) between sharp connecting rod (101) and the working head (103), have an eccentric orfice that communicates with connecting rod (101) centre bore in the curved bar (102), and stopping with working head (103) joint, the eccentric orfice of the center cavity of connecting rod (101) and curved bar (102) forms fluid path, and be opened on and the connection place of the point of working (103), its liquid can directly be supplied with working head by above-mentioned path, when treatment, liquid can be sent into periodontal pocket, angle M is less than 90 ° between the axis of the axis of connecting rod (101) and work point (103), curved bar (102) sees that near the face A-A of connecting rod (101) Fig. 8 is an off-centre operation, curved bar (102) sees that near the section B-B of work point (103) Fig. 9 is the circle of a breach, the cross section C-C of working head (103) sees that Figure 10 is a circle, and the interior rib-loop (104) in the work point is used for spinning with transducer;

B. root canal work point, its structure is seen Figure 11, termination is being located in hole (111) in the connecting rod (101) near root canal file installing hole (113), the liquid of from hole (111), sending here, from the position that stops near hole (111) that open with aperture (112) that hole (111) communicate spray, and, the axes intersect of the axis of aperture (112) and hole (113), its angle of cut S is greater than 0 °, liquid can directly be sprayed onto on the root canal file like this, in treatment, liquid directly can be sprayed into the root pipe, especially hole (111), (112), the axis of axis (113) and connecting rod (101) is positioned at same plane, for the ease of root canal file is installed, hole (113) is a blind hole, and for easy to process, hole (113) also can be through holes, root canal file is screwed, the interior rib-loop (114) of this work point can be screwed into Luo Ding, is used for fixing root canal file, and interior rib-loop (104) is used for spinning with transducer.

Dc source of the present utility model has adopted the switching regulator mu balanced circuit, in electrical schematic diagram shown in Figure 12, dc source by IC1, Q11, T11, T12, and D101～112, C101～C117, R11～R18, L11, K1, BX1 etc. form; The 50HZ alternating current becomes pulsating direct current after diode D102～D105 rectification, capacitor C 106 filtering; the switching regulator mu balanced circuit of forming for core via IC 1, audion Q11, transformator T12, diode D109～D112 and capacitor C 117 is transformed to constant voltage dc source again; use for complete machine; capacitor C 101～C105, line filter T11 are used for the interference of the higher hamonic wave of filtering switching pulse to the 220V electrical network, and diode D101 is used for overvoltage protection.This utility model is provided with an external power supply plug, is used for external connection battery, and after plug inserted jack, the dc source in the therapeutic instrument was cut off, and changes the external connection battery power supply into, and this power supply mode is specially adapted to areas without electricity and uses.

This utility model is provided with multiple auxiliary device, this machine allomeric function of making is strengthened, and has made things convenient for use, in electrical schematic diagram shown in Figure 12, IC4 is a power supply, produce E6 voltage, light emitting diode D414 is a power supply indicator, and it can reflect the duty of power supply E1, E2, E5, E6 simultaneously, K3 is a foot switch, whether be used for control to the E7 power supply, form the transducer working indicating, introduce each auxiliary device below by resistance R 48, R49, diode D413, audion Q44;

Inhale the saliva device: its structure is seen Fig. 4, and vacuum pump (90) joins by pipeline (91) and fluid reservoir (92), joins from fluid reservoir (92) reuse pipeline (94) and suction nozzle (95), simultaneously, has a waste liquid to topple over path (93) on the fluid reservoir (92).Vacuum pump (90) passes through pipeline (91) to fluid reservoir (92) evacuation, making fluid reservoir (92) interior is negative pressure, like this by suction nozzle (95), just can with waste liquid in pipeline (94) sucks fluid reservoir (92), have a waste liquid to topple over path (93) on the fluid reservoir (92) simultaneously;

Energy indicating circuit: see electrical schematic diagram shown in Figure 12, the energy indicating circuit, by IC3, D30～D39, R31～R33 forms, 2 feet of IC 3 connect common port, 3 feet meet power supply E5, be connected to resistance R 31 between 4 feet and the common port, the sampling voltage of 5 feet is directly taken from the power supply E3 in the supersonic generator, between 6 feet and 8 feet resistance R 32 is arranged, 7 feet and 6 feet join, be connected to resistance R 33 between 8 feet and the common port, 9 feet are empty foot, be connected to diode D39 between 10 feet and 11 feet, be connected to diode D38 between 11 feet and 12 feet, be connected to diode D37 between 12 feet and 13 feet, be connected to diode D36 between 13 feet and 14 feet, be connected to diode D35 between 14 feet and 15 feet, be connected to diode D34 between 15 feet and 16 feet, be connected to diode D33 between 16 feet and 17 feet, be connected to diode D32 between 17 feet and 18 feet, be connected to diode D31 between 18 feet and 1 foot, be connected to diode D30 between 1 foot and the power supply E5, Light-Emitting Diode D30～D39 wherein is used to indicate the size of energy, the proportional relation of sampling voltage signal of its luminous number and IC 3 the 5th foot.

In electrical schematic diagram shown in Figure 12, inhale saliva system fluid reservoir liquid level warning, holding circuit is by IC5, A, R41, R47, Q41, D404, D405, D408, YD2, J3 forms, A is probe, when the waste liquid liquid level in the fluid reservoir 92 reaches probe A, the input of Schmidt trigger IC5 becomes low level by high level, its output changes high level into by low level, make switching tube Q41 conducting, at this moment light emitting diode D402 is luminous, and buzzer YD2 sends chimes of doom, relay J 3 actions, cut off the power supply E1 of vacuum pump P2, vacuum pump quits work, thereby plays a protective role, after pouring out waste liquid, circuit recovers operate as normal; K2 is a hand switch;

In electrical schematic diagram shown in Figure 12, fluid reservoir pit alert system (one) is made up of B, IC6, Q42, R42, R46, D403, D407, YD2 in the liquid delivery system, when in the fluid reservoir during no liquid, the input of Schmidt trigger IC6 by high level transfer low level to, its outfan transfers high level to by low level, thereby make switching tube Q42 conducting, light emitting diode D403 is luminous, buzzer YD2 sends chimes of doom, behind filling liquid, sound and light alarm stops, and this warning system can be used in foregoing each fluid reservoir;

In electrical schematic diagram shown in Figure 12, fluid reservoir pit alert system (two) is by C in the liquid delivery system, IC7, IC8, Q43, R43, R45, D402, D406, YD2 forms, when in the fluid reservoir during no liquid, the input of Schmidt trigger IC7 transfers high level to by low level, its outfan is the input of Schmidt trigger IC8, then transfer low level to by high level, like this, the output of Schmidt trigger IC8 transfers high level to by low level, make switching tube Q43 conducting, light emitting diode D402 is luminous, buzzer YD2 sends chimes of doom, behind filling liquid, sound, light is reported to the police and is stopped, and this warning system can be used in foregoing each fluid reservoir;

In above-mentioned three kinds of warning systems, because the effect of diode D406～D408 makes that various warning systems can public buzzer YD2.

This utility model is reasonable in design, multiple functional, volume is little, in light weight, be easy to carry, easy to use, be a kind of incorporate portable supersonic dentistry therapy instrument.

Claims (10)

1, a kind of portable supersonic dentistry therapy instrument, mainly form by control circuit, ultrasonic drive circuit, power supply, panel, casing etc., it is characterized in that: compressed air source (1) is connected with liquid delivery system, the output of liquid delivery system is connected with plug (10) jointly with the outfan of ultrasonic drive circuit, plug (10) is connected with transducer (11), and transducer (11) is provided with the work point.

2, dentistry therapy instrument according to claim 1 is characterized in that, liquid delivery system is following structure:

Compressed air source (1) joins with pipeline (2) and fluid reservoir (3), join from the end of fluid reservoir (3) reuse pipeline (5) with electromagnetic valve (6), the other end of electromagnetic valve (6) joins with the end of pipeline (7) with flow control valve (8), the other end of flow control valve (8) joins with the end of pipeline (9) with plug (10), and the other end of plug (10) and transducer (11) directly join.

3, dentistry therapy instrument according to claim 1 is characterized in that, liquid delivery system is following structure:

Compressed air source (1) joins with the end of pipeline (21) with three way cock (22), three way cock's (22) the other end joins with pipeline (23) and fluid reservoir (3), join from the end of fluid reservoir (3) reuse pipeline (5) with electromagnetic valve (6), the other end of electromagnetic valve (6) joins with the end of pipeline (28) with three way cock (35), three way cock (22) remains that end and joins with pipeline (29) and fluid reservoir (30), join from the end of fluid reservoir (30) reuse pipeline (32) with electromagnetic valve (33), the other end of electromagnetic valve (33) is connected to the other end of three way cock (35) with pipeline (34), three way cock (35) remains that end, join with the end of pipeline (36) with flow control valve (8), the other end of flow control valve (8), be connected to an end of plug (10) with pipeline (9), the other end of plug (10) and transducer (11) directly join.

4, dentistry therapy instrument according to claim 1 is characterized in that, liquid delivery system is following structure:

Compressed air source (1) joins with the end of pipeline (21) with three way cock (22), three way cock's (22) the other end joins with pipeline (23) and fluid reservoir (3), join from the end of fluid reservoir (3) reuse pipeline (5) with electromagnetic valve (6), the other end of electromagnetic valve (6) joins with the end of pipeline (58) with flow control valve (59), the other end of flow control valve (59) joins with pipeline (60) one of them input with plug (10), three way cock (22) remains that end and joins with pipeline (29) and fluid reservoir (30), join from the end of fluid reservoir (30) reuse pipeline (32) with electromagnetic valve (33), the other end of electromagnetic valve (33), join with the end of pipeline (66) with flow control valve (67), the other end of flow control valve (67) joins with pipeline (68) another input with plug (10), the outfan of plug (10), direct and transducer (11) joins.

5, dentistry therapy instrument according to claim 1; the structure that it is characterized in that plug is such: have in protection overcoat (74) mutually insulated electric wire (77), (78), (79), be connected with contact electrode (82), (83), (84) respectively; flexible pipe (75), (76) are arranged in protection overcoat (74) and portal with liquid (81) communicate, the above-mentioned connection and the part that communicates all are sealed in the housing (80).

6, dentistry therapy instrument according to claim 1, the electrically connected method that it is characterized in that ultrasonic drive circuit is as follows: behind capacitor C 23 and matching transformer T21 elementary in parallel, be connected between the X3 utmost point of power supply E4 and switching tube Q21, resistance R 22 is connected between the X2 utmost point of power supply E4 and switching tube Q21, the X1 utmost point of switching tube Q21 connects common port, matching transformer T21's is secondary, resistance R 23, transducer YD is the closed loop serial connection, the contact of resistance R 23 and transducer YD, link with common port, capacitor C 22 is with after inductance L 21 is connected, and is connected between the contact of the X2 utmost point of switching tube Q21 and matching transformer T21 and resistance R 23.

7, dentistry therapy instrument according to claim 1 is characterized in that the work point is following structure:

Work and be connected with a smooth curved bar (102) between sharp connecting rod (101) and the working head (103), have an eccentric orfice that communicates with connecting rod (101) centre bore in the curved bar (102), and stopping with working head (103) joint, curved bar (102) is an off-centre operation near the section A-A of connecting rod (101), curved bar (102) is the circle of a breach near the section B-B of work point (103), the cross section C-C of working head (103) is a circle, and angle M is less than 90 ° between the axis of the axis of connecting rod (101) and working head (103);

8, dentistry therapy instrument according to claim 1 is characterized in that the work point is following structure:

Have a hole (111) in the connecting rod (101), locating termination near root canal file installing hole (113), have an aperture (112) that communicates with hole (111) at the position that stops near hole (111), the axis angle of cut S of the axis of aperture (112) and hole (113) is more than or equal to 0 °, the axis of the axis of hole (111), (112), (113) and connecting rod (101) is positioned at same plane, and root canal file installing hole (113) is blind hole or through hole.

9, according to claim 1 or the described dentistry therapy instrument of claim 6, it is characterized in that:

The sampled signal of energy indicating circuit is directly taken from the power supply E3 of ultrasonic drive circuit in the ultrasonic drive circuit, is connected to resistance R 31 between 4 feet of IC4 and the common port.

10, dentistry therapy instrument according to claim 1, it is characterized in that, inhale being constructed as follows of saliva device: vacuum pump (90) joins by pipeline (91) and fluid reservoir (92), join from fluid reservoir (92) reuse pipeline (94) and suction nozzle (95), simultaneously, there is a waste liquid to topple over path (93) on the fluid reservoir (92).

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