CN103251441B - Handle of laparoscope scalpel - Google Patents

Abstract

The invention discloses a reusable handle of a laparoscope scalpel in the technical field of surgical instruments. The handle comprises a closed housing, a transmission mechanism, a trigger and an output rotating shaft, wherein the transmission mechanism is arranged in an inner space of the closed housing; the trigger is movably connected with an outer wall of the closed housing; and magnetic pieces are arranged at an input part of the transmission mechanism, on the trigger, at an output part of the transmission mechanism and on the output rotating shaft respectively, so that an acting force on the trigger is transferred to the output rotating shaft in a non-contact manner. The handle adopts the totally-closed housing, so that blood and other dirt are prevented from entering the interior of the handle during a surgery, and the handle can be used continuously and safely after disinfected integrally.

Description

Handle of laparoscope scalpel

Technical field

What the present invention relates to is a kind of device of technical field of surgical instrument, specifically a kind of nonexpondable handle of laparoscope scalpel.

Background technology

Existing laparoscope scalpel generally uses disposable handle, namely abandons after using, although avoid cross infection, surgery cost is expensive, and the financial burden of patient is heavier.Disposable handle is structurally open cavity, and handle has through hole, and inner axle and gear carry out the transmission of contact moment by through hole, like this, during operation, blood and dirt have an opportunity to enter handle inner, pollute, and affect the work efficiency of internal delivery mechanism.

Repeatedly use for handle capable of being at present, the basis of Open architecture is improved, method arranges sealing ring in the position of through hole to avoid the pollution that may occur.But sealing ring can not ensure completely isolated, and blood etc. still likely infiltrate handle inner, like this, patient with operation still faces the risk of cross infection.

Through finding the retrieval of prior art, Chinese patent literature CN2696724, publication date 2005-05-04, describe a kind of trigger of electrostatic spraying gun, comprise trigger, trigger supporting-point, also comprise the interlock Magnet of Bearing Angle, the fixed magnet on the rifle body corresponding with interlock Magnet; The Magnet of trigger bottom is corresponding with the dry-reed tube switch in rifle body.Namely adopt magnetic spring and magnetic switch, the reliability enhancing of trigger, fault rate are lowered, thus are extended the service life of electrostatic spraying gun.But the deficiency of this technology is: when voltage is enough high, spray gun end near zone forms air ionization district, air is ionizing and heating intensely, as used incessantly in a rapid lapse of time in rifle body, temperature will be more and more higher, because the rising magnetic of Magnet by temperature will reduce, therefore the magnetic trigger of spray gun has the possibility of inefficacy.This structure and characteristics all cannot be used in operating theater instruments simultaneously.

Summary of the invention

The present invention is directed to prior art above shortcomings, a kind of nonexpondable handle of laparoscope scalpel is provided, this handle adopts the housing of full-closed structure, blood and other dirts in operation are avoided to enter handle inner, after making this handle carry out overall disinfection, can continue to come into operation safely.

The present invention is achieved by the following technical solutions, the present invention includes: closure casing, drive mechanism, trigger and output revolving shaft, wherein: drive mechanism is arranged in the inner space of closure casing, trigger is movably connected on the outer wall of closure casing, be respectively equipped with pair of magnetic part on the input part of drive mechanism and trigger and on efferent and output revolving shaft, make the active force on trigger be passed to output revolving shaft in a non contact fashion.

Two sides of described closure casing are provided with inside groove, and trigger is connected with two grooves respectively by connector.Two connectors at this place can not run through housing.

Described closure casing comprises: the upper cover of symmetrical shape, lower cover and inserts quadric injection mould sealing strip, and wherein: upper cover and lower cover are closed by ultrasonic bonding, the outer periphery gap after ultrasonic bonding is again by insert injection moulding secondary seal.

Described drive mechanism comprises: gear, tooth bar and ball-screw nut, wherein: the correspondence position of gear and trigger arranges pair of magnetic part, one end of tooth bar and gears meshing, the other end engages with ball-screw nut, and the correspondence position of ball-screw nut and output revolving shaft arranges pair of magnetic part.

The first described magnetic part and the spacing of the second magnetic part are preferably 2.3mm.

Described magnetic part is preferably neodymium iron boron, trade mark N50; This magnetic part is more preferably through surface coated treatment.

Described face coat is plating: nickel, zinc, gold or chromium or coating epoxy resin.

Transmission place of described gear and trigger, ball-screw nut and output revolving shaft all realizes non-contact transmission by magnetic part, and operation can not be caused to pollute.

Technique effect

Housing of the present invention is totally enclosed type, and the dirts such as the blood in operation cannot enter in housing, and housing can overall disinfection, still can reuse safely, reduce the financial burden of patient after sterilization.

Meanwhile, adopt scalpel original function of the present invention to be affected, can surgical quality be ensured.

Accompanying drawing explanation

Fig. 1 is external structure of the present invention;

Fig. 2 is front section view of the present invention;

Fig. 3 is the M portion partial enlarged drawing of Fig. 2;

Fig. 4 is side sectional view of the present invention;

Fig. 5 is the A portion partial enlarged drawing of Fig. 4;

Fig. 6 is the R portion partial enlarged drawing of Fig. 5.

Detailed description of the invention

Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.

Embodiment 1

As shown in Figure 1 and Figure 2, the present embodiment comprises: closure casing, drive mechanism, trigger 3 and output revolving shaft 9, wherein: drive mechanism is arranged in the inner space of closure casing, trigger 3 is movably connected on the outer wall of closure casing, be respectively equipped with the first magnetic part 6 and the second magnetic part 11 on the input part of drive mechanism and trigger 3 and on efferent and output revolving shaft 9, make the active force on trigger 3 be passed to output revolving shaft 9 in a non contact fashion.

As shown in Figure 2 and Figure 3, described drive mechanism comprises: gear 2, tooth bar 5 and ball-screw nut 8, wherein: the correspondence position of gear 2 and trigger 3 arranges the first magnetic part 6, one end of tooth bar 5 is engaged with gear 2, the other end engages with ball-screw nut 8, and ball-screw nut 8 arranges the second magnetic part 11 with the correspondence position of output revolving shaft 9.

Transmission place of described gear 2 and trigger 3, ball-screw nut 8 and output revolving shaft 9 is all non-contact transmissions, and operation can not be caused to pollute.

Described output revolving shaft 9 is connected by end cap 10.

When operation uses, pull trigger 3, this place first magnetic part 6 acts on, and gear 2 rotates, and active force is through conducting to ball-screw nut 8, and the second magnetic part 11 that ball-screw nut 8 rotarily drives this place acts on, and output revolving shaft 9 rotates, and active force exports.

Magnetic part in the present embodiment uses ferromagnetic material neodymium iron boron, and trade mark N50, N50 material magnet peak magnetism of material is strong, Gauss: 8500 surface treatments; Electronickelling serviceability temperature is less than 80 DEG C, and the mechanical performance of ndfeb magnet will be got well compared with other Magnet, is easier to cutting and boring and complicated shape and processes.The general surface coated treatment of ndfeb magnet, electrodepositable nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy) etc.

Calculation of magnetic force: the Maxwell formula by simplifying: F=(B*B*S)/2 μ₀; Magnetic pole area S(unit m²); Magnetic pole surfaces magnetic induction density B (unit T); Plastic cement PP pcrmeability is almost identical with permeability of vacuum, permeability of vacuum μ₀=4 π * 10^-7(unit H/m); B gets 0.4 ~ 0.7(T); Magnet specification 5*20*15mm; Because the Magnet trade mark inquired into is N50, B gets 0.65(T here); The magnetic force that acting surface obtains when being 20*15mm event two Magnet right opposite effect is: F=(B*B*S)/2 μ₀=0.65*0.65*0.0003/2*4 π * 10^-7=50.43N, this numerical value also demonstrates first trip forward pulling force data in form below.

Magnetic force is tested: relation between Magnet magnetic force and distance, and test data gathers following form: Magnet specification 5*20*15mm; Ferromagnetic material neodymium iron boron, trade mark N50; Dynamometric device is chest expander; Ambient temperature 20 DEG C.

Two is just larger to the less magnetic force of the distance between Magnet to have above experimental data to find out; Distance between this device two Magnet is 2.3mm.

As shown in Figure 4, Figure 5, two sides of described closure casing are provided with inside groove, and trigger 3 is connected with two grooves respectively by connector 7.Two connectors 7 at this place can not run through housing, and in prior art, herein be through hole, trigger 3 and the direct Contact Transmission of internal transmission part, the sealing member by means of only through hole place seals.

In the present embodiment, described connector 7 adopts screw to realize, and under other different situations, those skilled in the art also can adopt other conventional meanses with similar effect to replace.

Described closure casing comprises: the upper cover 4 of symmetrical shape, lower cover 1 and inserts quadric injection mould sealing strip 12, wherein: as shown in Figure 6, upper cover 4 and lower cover 1 are closed by ultrasonic bonding, and the outer periphery gap after ultrasonic bonding is again by insert injection moulding secondary seal and inserts quadric injection mould sealing strip 12.

Claims (7)

1. a handle of laparoscope scalpel, it is characterized in that, comprise: closure casing, drive mechanism, trigger and output revolving shaft, wherein: drive mechanism is arranged in the inner space of closure casing, trigger is movably connected on the outer wall of closure casing, be respectively equipped with pair of magnetic part on the input part of drive mechanism and trigger and on efferent and output revolving shaft, make the active force on trigger be passed to output revolving shaft in a non contact fashion.

2. handle according to claim 1, is characterized in that, two sides of described closure casing are provided with inside groove, and trigger is connected with two grooves respectively by connector.

3. handle according to claim 1 and 2, it is characterized in that, described closure casing comprises: the upper cover of symmetrical shape, lower cover and sealing strip, and wherein: upper cover and lower cover are closed by ultrasonic bonding, the outer periphery gap after ultrasonic bonding is again by insert injection moulding secondary seal.

4. handle according to claim 1, it is characterized in that, described drive mechanism comprises: gear, tooth bar and ball-screw nut, wherein: the correspondence position of gear and trigger arranges the first magnetic part, one end of tooth bar and gears meshing, the other end engages with ball-screw nut, and the correspondence position of ball-screw nut and output revolving shaft arranges the second magnetic part; The non-contact transmission of gear and trigger, ball-screw nut and output revolving shaft is realized by the first magnetic part and the second magnetic part.

5. handle according to claim 4, is characterized in that, the first described magnetic part and the spacing of the second magnetic part are 2.3mm.

6. the handle according to claim 1 or 2 or 4 or 5, it is characterized in that, described magnetic part is neodymium iron boron, trade mark N50; This magnetic part is through surface coated treatment.

7. handle according to claim 6, is characterized in that, described face coat is plating: nickel, zinc, gold or chromium or coating epoxy resin.