CN214761235U

CN214761235U - Negative pressure drive device suitable for operation

Info

Publication number: CN214761235U
Application number: CN202120636456.2U
Authority: CN
Inventors: 冯就勉; 袁智强; 陈恺琪; 陈志�
Original assignee: PSC; Pumi Medical Co ltd
Current assignee: PSC; Pumi Medical Co ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-11-19
Anticipated expiration: 2031-03-29

Abstract

The utility model provides a negative pressure drive device that operation was suitable for, include: the handle is provided with an air inlet and an air outlet and consists of an operation part and a handheld part, the operation part is used for entering the body of a patient or performing an operation on the body surface of the patient, and the handheld part is used for enabling a doctor to operate the handle; the air inlet is arranged at the front end of the operation part, and the air outlet is arranged at the rear end of the handheld part; the air inlet and the air outlet are connected to form an air flow channel, and the air outlet is connected with the medical smoke extractor; a driving shaft rotatably supported at the air inlet; the fan blade rotating assembly is fixed on the driving shaft; the medical smoke extractor forms negative pressure in the air flow channel, so that external air enters the air flow channel from the air inlet, the fan blade rotating assembly is driven to rotate, and the driving shaft is driven to rotate. The general medical smoking machine can efficiently suck abrasive dust, dust or smoke generated by work while providing high-speed airflow to drive equipment to rotate at high speed, thereby effectively reducing the risk of cross infection.

Description

Negative pressure drive device suitable for operation

Technical Field

The utility model relates to the field of medical equipment, more specifically relates to a negative pressure drive equipment that operation is suitable for.

Background

The polishing apparatus for operation in the current market is generally driven by electric power, and needs additional equipment to treat abrasive dust, smoke and the like, for example, high-pressure water washing equipment or a smoking machine needs to be additionally utilized to treat the abrasive dust, the smoke and the like. These additional abrasive dust and dust treatment equipment systems are complex in composition, making the surgical procedure cumbersome. Even the integration of a smoking or dust collection assembly directly on a surgical medical device can result in a heavy weight for some of these medical devices, which is not easy for a health care provider to handle and is prone to error. Meanwhile, the efficiency of the extra abrasive dust and dust treatment equipment system for treating abrasive dust, dust or smoke is not high, and the abrasive dust, dust or smoke generated in the operation belongs to medical waste, so that cross infection of doctors and patients is easily caused due to improper treatment of the medical waste. Moreover, the cost of the abrasive dust treatment equipment system or the grinding apparatus integrated with the smoking and dust collection functions is also high.

Meanwhile, the existing surgical polishing instruments are generally of two types, wherein one type is that a motor is arranged in the instrument and provides rotating power for the polishing instrument to realize the polishing function of the polishing instrument, but if a higher rotating speed is realized, a motor with higher power is needed, the volume and the weight of the motor need to be increased, so that the weight of the instrument is increased, and the long-time surgical operation of a doctor is not facilitated; the second is that the instrument of polishing self is not provided with the motor, but passes through the motor of flexible axle connection extra preparation, and the motor passes through the flexible axle and provides rotation power for the instrument of polishing, but the flexible axle to a great extent has restricted the turned angle of the instrument of polishing, is unfavorable for the doctor to carry out accurate operation.

Therefore, a medical polishing device which has low cost and light self weight and can effectively treat the abrasive dust, dust or smoke generated in the operation is in need of development.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned prior art's at least one defect, provide a negative pressure drive equipment that operation is suitable for solve present medical treatment abrasive dust treatment facility system composition complicated, the cost is higher, and the problem that the instrument of polishing becomes heavy behind other subassemblies of integration.

The utility model discloses a technical scheme include:

a surgically-applicable negative pressure driven apparatus comprising: the handle is provided with an air inlet and an air outlet and consists of a surgical operation part and a handheld part, the surgical operation part is used for entering the body of a patient or performing surgery on the body surface of the patient, and the handheld part is used for enabling a doctor to operate the handle; the air inlet is arranged at the front end of the operation part, the air outlet is arranged at the rear end of the handheld part, the air inlet and the air outlet are connected to form an air flow channel, and the air outlet is connected with the medical smoke extractor; a drive shaft rotatably supported to the air inlet; a fan blade rotating assembly fixed to the driving shaft; the medical smoking machine forms negative pressure in the air flow channel, so that external air enters the air flow channel from the air inlet, the fan blade rotating assembly is driven to rotate, and the rotation of the fan blade rotating assembly drives the driving shaft to rotate.

The medical smoke extractor connected with the air outlet forms negative pressure in an air flow channel, so that when external air flow enters the handle from the air inlet, the fan blade rotating assembly is driven to rotate, the driving shaft is driven to rotate, in practical application, a tool head connected with the driving shaft is additionally arranged on the driving shaft, the tool head is at least used for grinding, drilling or cutting, when the driving shaft is driven to rotate by the fan blade rotating assembly, the tool head connected with the driving shaft can be driven to rotate, functions of grinding, cutting or drilling and the like are achieved, and the negative pressure driving device can be put into practical application. Meanwhile, the medical smoke extractor provides a high-speed airflow to drive the tool head connected with the equipment in a high-speed rotating manner to effectively suck medical wastes such as abrasion dust, dust or smoke generated during grinding, cutting or drilling. That is to say, medical smoke extractor can produce the suction effect when being applied to this drive arrangement, and the negative pressure that forms also is drive tool head pivoted power simultaneously, makes drive arrangement can be when drive tool head pivoted high-efficient suction abrasive dust, dirt or cigarette, converts gaseous kinetic energy into mechanical energy, increases substantially the rotational speed of tool head. Except that medical smoking machine, the utility model provides a drive arrangement itself need not other extra washing, smoking equipment cooperation work, and drive arrangement self simple structure, weight are lighter, with low costs and easy operation can realize the function of high-efficient suction abrasive dust, dirt or cigarette when polishing, cutting or boring.

Further, the fan blade rotating assembly is a rotatable fan blade group with more than two stages; the air inlet is provided with a fixed fan blade; the two or more stages of rotatable fan blade sets are arranged in the middle or the rear end of the driving shaft.

The fixed flabellum of locating the air inlet combines the flabellum of the high-speed rotation of the rotatable fan blade group more than the two-stage to be used for changing the flow direction of air inlet work area air current, make one section distance in front and back of fixed flabellum include the airflow of the tool bit work area who is connected with the actuating shaft mainly be the whirl, be turbulent state, form the tornado effect, improve the flow velocity of air current and the suction effect of reinforcing air current, the rotatable fan blade group more than the two-stage can provide stronger rotation power, thereby drive actuating shaft and tool bit high-speed rotation, make it polish, effect when cutting or boring is better.

Further, the driving shaft is respectively connected with bearings at the front end and the rear end of the driving shaft so as to realize that the driving shaft is rotatably supported on the air inlet; and bearings connected with the front end and the rear end of the driving shaft are respectively arranged at two sides of the fan blade rotating assembly.

Thereby the drive shaft is connected with the bearing at its front end and rear end and is rotated support in the air inlet, can provide more stable rotational power for its instrument head of connecting, even under high-speed rotation, instrument head and drive shaft also can not shift, can realize polishing, cutting and the function of boring steadily.

Further, a speed regulating component is arranged at the front end or the rear end of the handheld part and used for controlling the flow of external air entering the air flow channel. The handheld part is a part operated by a doctor through a handle, the speed regulating part is arranged at the front end or the rear end of the handheld part, the doctor can not shield or cover the speed regulating part while operating the handle, and the speed regulating part is used for controlling the flow of external air entering the air flow channel and reducing or improving the flow of the external air flowing into the air flow channel when necessary.

Further, the speed regulating component comprises a first sub speed regulating component and a second sub speed regulating component, and the first sub speed regulating component is rotatably embedded in the second sub speed regulating component; a plurality of first air inlets are arranged at the embedded position of the first sub speed regulation part; a plurality of second air inlets are arranged at the embedding position of the second sub speed regulating part; the plurality of first air inlet holes and the plurality of second air inlet holes are matched to control the flow of external air entering the air flow channel.

Under the condition that the suction flow of the medical smoking machine is fixed, when the plurality of first air inlet holes and the plurality of second air inlet holes are completely overlapped, the air inlet area of the overlapped two air inlet holes reaches the maximum, external air can enter an air flow channel in the handle from the air inlet and the overlapped positions of the first air inlet holes and the second air inlet holes, the air entering the air flow channel from the overlapped positions of the first air inlet holes and the second air inlet holes does not act on the rotatable fan blade groups with more than two stages, and the rotating speed of the rotatable fan blade groups with more than two stages is the lowest; in a similar way, when the plurality of first air inlet holes and the plurality of second air inlet holes are completely staggered and mutually sealed, the air inlet areas of the two air inlet holes reach the minimum, the external air entering the air flow channel can completely act on the fan blade group, and the rotating speed of the fan blades is highest. The doctor can make the first inlet port and the second inlet port form coincidence/stagger of different degrees through rotating first sub speed regulating part or second sub speed regulating part according to actual operation needs to adjust the flow that outside air got into the air runner, thereby change the operating speed of equipment. The quantity and the size of first inlet port and second inlet port are not restricted, can be decided according to actual demand, for example when the size of second inlet port is less, can set up the second inlet port that the quantity is more and cooperate with first inlet port and carry out the speed governing.

Further, the number of the blades of each stage of fan blades of the two or more stages of rotatable fan blade groups ranges from 3 to 30; the hub ratio of each stage of fan blade ranges from 0.2 to 0.6; the range of the installation angle of each stage of fan blades is 70-80 degrees; the number of the blades of the fixed fan blade ranges from 3 to 30, and the hub ratio of the fixed fan blade ranges from 0.3 to 0.8; the range of the installation angle of the fixed fan blades is 70-80 degrees.

Further, the apparatus further comprises: and the flow guide piece is arranged on the air inlet and exposed out of the handle.

The flow guide part exposed out of the handle is arranged on the air inlet and used for guiding air near the flow guide part to the air flow channel in the handle and simultaneously guiding abrasive dust, dust and smoke generated when the tool head connected with the driving shaft works to enter the air flow channel, so that the suction efficiency and effect of the abrasive dust, the dust and the smoke are improved while the abrasive dust, the dust and the smoke are blocked.

Further, the guide part is in a horn shape which diverges outwards. The trumpet-shaped flow guide piece is more favorable for guiding external air to enter the air flow channel and simultaneously is favorable for guiding abrasive dust, dust and smoke to enter the air inlet.

Further, the flow guide piece is of a sheet structure or an annular structure. The sheet structure or the annular structure's water conservancy diversion spare can play certain effect of sheltering from, prevents that abrasive dust, dirt and cigarette direct contact medical personnel or everywhere from splashing.

Furthermore, the material of water conservancy diversion spare is transparent or has the observation breach, therefore the water conservancy diversion spare can not produce any sight to doctor's operation and hinder.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a drive arrangement's hand-held part weight greatly reduced, consequently medical personnel are difficult for producing fatigue and easily carry out meticulous operation when using. The general medical smoking machine can efficiently suck generated abrasive dust, dust or smoke when providing the rotation power for polishing, cutting or drilling, thereby effectively reducing the risk of cross infection among doctors and patients. Meanwhile, the driving equipment only needs the medical smoking machine as a negative pressure driving source, and other additional integrated components or equipment are not needed for matching, so that the running cost of the whole equipment is greatly reduced.

Drawings

Fig. 1 is a schematic structural composition diagram of a driving apparatus of the embodiment.

Fig. 2 is a perspective view of the driving apparatus of the embodiment.

Fig. 3 is a schematic view of a change in the airflow state of the drive apparatus of the embodiment.

Fig. 4 is a schematic structural view illustrating the guide member of the driving apparatus of the embodiment attached to the handle.

Description of reference numerals:

a handle 100; a surgical operation section A; a surgical operation portion a 1; a surgical operation portion a 2; a surgical operation portion a 3; a hand-held part B; a hand-held portion B1; a hand-held portion B2; the first air intake holes B1-1; the second air intake holes B2-1; an air inlet 110; an air outlet 120; a drive shaft 200; a fan blade rotating assembly (two or more stages of rotatable fan blade sets) 310; a stationary fan blade 320; a tool head 400; a first bearing 510; a second bearing 520; a nut 600; a coupling 700; a silicone bellows 800; a flow guide 900.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

As shown in fig. 1, the present embodiment provides a negative pressure driving apparatus suitable for surgery, comprising: handle 100, drive shaft 200, fan blade rotating assembly 310. The tool head 400 is connected to the drive shaft 200 of the suction driving apparatus.

The handle 100 is divided A, B into two parts, a surgical operation part A for entering or performing an operation on the body surface of a patient and a hand-held part B for enabling a doctor to manipulate the handle.

The handle is provided with an air inlet 110 and an air outlet 120, the air inlet 110 is arranged at the front end of the operation part A, and the air outlet 120 is arranged at the rear end of the hand-held part B. Specifically, as shown in fig. 1 and 2, the surgical operation portion a of the handle 100 is detachable into three parts which can be fitted to each other, namely, a surgical operation portion a1, a surgical operation portion a2, and a surgical operation portion A3. The hand-held portion B of the handle 100 is separable into two mutually engaging portions, namely, a hand-held portion B1 and a hand-held portion B2, and as shown in fig. 2, the surgical operation portion A3 and the hand-held portion B1 are engaged with each other to connect the surgical operation portion a and the hand-held portion B.

Referring to fig. 1 and 2, the air inlet 110 is connected to the air outlet 120, an air flow channel is formed inside the handle 100, the air outlet 120 is connected to the medical smoke extractor, and preferably, before the air outlet 120 is directly connected to the medical smoke extractor, the air outlet 120 is connected to the silicone corrugated tube 800 and is connected to the medical smoke extractor through the silicone corrugated tube 800. Alternatively, the medical smoke extractor may be another negative pressure driving source, but a negative pressure driving source capable of processing medical wastes is the most preferable of the present embodiment.

Referring to fig. 1 and 2, the driving shaft 200 is rotatably supported on the air inlet 110, and the fan blade rotating assembly 310 is fixed to the driving shaft 200. The tool head 400 is coupled to the front end of the driving shaft 200 and exposed to the handle 100, and the tool head 400 is used at least for grinding, drilling or cutting. When the fan blade rotating assembly 310 rotates, the driving shaft 200 is driven to rotate, and the tool head 400 connected to the driving shaft 200 is driven to rotate.

Specifically, the drive shaft 200 is rotatably supported by the air inlet 110 through the cooperation of a first bearing 510, a second bearing 520 and a nut 600, the first bearing 510 is provided at the front end of the drive shaft 200, the second bearing 520 is provided at the rear end of the drive shaft 200, and the nut 600 is fitted into the second bearing 520 to connect the surgical operation units a1, a2 and A3. The driving shaft 200 is rotatably supported to the air inlet 110 by being coupled to the first and

second bearings

510 and 520 at the front and rear ends thereof, so that it is possible to provide more stable rotational power to the tool bit 400 coupled thereto, the tool bit 400 and the driving shaft 200 are not displaced even at high-speed rotation, and it is possible to stably perform functions of grinding, cutting and drilling.

Specifically, as shown in fig. 1 and 2, the fan blade rotating assembly 310 is a two-stage or more rotatable fan blade set 310, the fixed fan blade 320 is further disposed at the air inlet 110, and the two-stage or more rotatable fan blade set 310 is disposed at the middle or rear end of the driving shaft 200. Specifically, the first bearing 510 is disposed at the front end of the driving shaft, and preferably, the first bearing 510 may be fittingly fixed to the fixed fan blade 320. The second bearing 520 is disposed at the rear end of the driving shaft 200, and the two or more stages of the rotating fan blade sets 310 are advantageous for increasing the rotation speed of the driving shaft 200, i.e., also the rotation speed of the tool bit 400.

Preferably, the number of blades of each stage of the fan blades of the two or more rotatable fan blade groups 310 ranges from 3 to 30; the hub ratio of each stage of fan blades ranges from 0.2 to 0.6; the range of the installation angle of each stage of fan blades is 70-80 degrees.

Preferably, the number of the blades of the fixed fan blade 320 ranges from 3 to 30, and the hub ratio of the fixed fan blade 320 ranges from 0.3 to 0.8; the range of the installation angle of the fixed fan blade 320 is 70-80 degrees.

Table 1 shows the rotational speed data of the driving devices of the experimental sample numbers C2001V1 and C2001V 4.

The parameters of the two or more stages of the rotatable fan blade set 310 and the fixed fan blade 320 of the driving device with the experimental sample number C2001V1 are not in the above preferred ranges, and the rotation speed of the fan blade set of the driving device with the experimental sample number C2001V1 is about 10000 RPM.

The parameters of the two or more stages of the rotatable blade group 310 and the fixed blade 320 of the driving device of the experimental sample number C2001V4 are both within the above preferred ranges, and the rotation speed of the blade of the driving device of C2001V4 and the tool head 400 is about 80000 RPM.

It can be seen that the parameters of the two or more stages of rotatable fan blade sets 310 and the fixed fan blades 320 can effectively increase the rotation speed of the two or more stages of rotatable fan blade sets 310 if they are within the preferred value ranges provided above.

TABLE 1

Sample numbering	Rotational speed (RPM)
		C2001V1	About 10000RPM
C2001V4	About 80000RPM

Alternatively, the tool head 400 and the drive shaft 200 may be coupled by the coupling 700, and alternatively, the tool head 400 may be directly nested or directly mounted to the drive shaft 200 without the coupling 700. Under this alternative, the tool head 400 can be replaced in different application scenarios, and the tool head 400 can also be a disposable product, which improves the stability of the driving device and reduces the cost of the driving device since the coupling 700 is not needed. The tool head 400 is at least used for grinding, drilling or cutting, meaning that the tool head 400 may be at least a grater, a drill or a head having a cutting function.

The operation process of the driving device is as follows: after the medical smoke exhaust machine is started, negative pressure is formed in the air flow channel of the handle through the air outlet 120, so that external air enters the air flow channel from the air inlet 110, the external air firstly passes through the fixed fan blade 320, the flow direction of the air flow in the peripheral area of the air inlet 110 can be changed by the fixed fan blade 320, the air flow in the front and back of the fixed fan blade 320 including the working area of the tool head 400 is mainly rotary flow and in a turbulent flow state, and a tornado effect is formed, as shown in fig. 3, the air flow in the front and back of the fan blade 320 including the working area of the tool head 400 is in a turbulent flow state, the tornado effect is formed in the working area of the tool head 400, the efficiency of sucking abrasive dust, dust or smoke is improved, the air flow drives the rotatable fan blade group 310 with more than two stages to rotate at high speed, so as to drive the driving shaft 200 and the tool head 400 connected with the driving shaft 200 to rotate at high speed, and the grinding of the tool head 400 is realized, Cutting or drilling, etc. Meanwhile, the negative pressure formed by the medical smoke extractor can effectively suck generated medical wastes such as abrasive dust, dust or smoke when the tool head 400 is used for grinding, cutting or drilling. That is, the negative pressure formed when the medical smoke exhaust ventilator is applied to the driving device can generate a suction effect, and simultaneously, the kinetic energy of the gas is converted into mechanical energy, namely, the mechanical energy is used for driving the tool head 400 to rotate, so that the rotating speed of the tool head 400 is greatly increased, and the tool head can efficiently suck abrasive dust, dust or smoke while rotating. Except that medical smoking machine, the utility model provides a drive arrangement itself need not other extra washing, smoking equipment cooperation work (need not additionally use other equipment to carry out the suction of abrasive dust etc. when polishing promptly), drive arrangement self simple structure, weight is lighter, with low costs and easy operation, can realize the function of high-efficient suction abrasive dust, dirt or cigarette when polishing, cutting or boring, because drive arrangement is passive product, the problem of EMI (Electromagnetic Interference) or EMC (Electro Magnetic Compatibility Electromagnetic Compatibility) has been avoided for electronic class's active product.

Preferably, the driving apparatus further includes a guide member 900 disposed at the air inlet 110 of the handle 100 and exposed from the handle 100.

The guiding member 900 exposed out of the handle 100 is disposed at the air inlet 110, and is used for guiding air in the vicinity of the guiding member 900 to the air flow passage in the handle 100, and simultaneously guiding the abrasive dust, the dust and the smoke generated during the operation of the tool head 400 to enter the air flow passage, so as to block the abrasive dust, the dust and the smoke and improve the suction efficiency and the suction effect of the abrasive dust, the dust and the smoke.

Preferably, as shown in connection with fig. 1 and 2, the baffle 900 is flared outwardly. The trumpet-shaped flow guide 900 is more advantageous in guiding external air into the air flow passage and also in guiding abrasion dust, dust and smoke into the air flow passage.

Preferably, as shown in fig. 4, the flow guiding member 900 has a sheet-like structure or a ring-like structure, and the flow guiding member 900 is provided with a ring-shaped interface connected with the air inlet 110, as shown in fig. 4(a), the flow guiding member 900 has a sheet-like structure; as shown in fig. 4(b), the flow guiding member is of an annular structure, and the flow guiding members 900 of two structures can both play a certain shielding role when the tool head 400 works, so as to prevent the abrasive dust, the dust and the smoke from directly contacting the medical care personnel or splashing around, and play a role in guiding the outside air and the abrasive dust, the dust or the smoke to enter the air flow passage. In practical application, a doctor can replace the diversion element 900 with different structures according to actual needs, so that the driving device is suitable for more scenes.

Preferably, the material of the flow guide 900 is transparent or has an observation gap, so that the flow guide 900 does not cause any visual obstruction in the operation process of the doctor, and the doctor can accurately perform the operation.

Preferably, as shown in fig. 1 and 2, the hand-held portion B1 and the hand-held portion B2 are rotatably engaged with each other, the hand-held portion B1 and the hand-held portion B2 are engaged to adjust the flow rate of the external air entering the air inlet 110, the hand-held portion B1 is a first sub speed regulation member of the hand-held portion B, and the hand-held portion B2 is a second sub speed regulation member of the hand-held portion B.

The specific principle and process of speed regulation of the hand-held part B1 and the hand-held part B2 are as follows:

a plurality of first air inlet holes B1-1 are formed in the embedded position of the handheld portion B1, a plurality of second air inlet holes B2-1 are formed in the embedded position of the handheld portion B2, and when the handheld portion B1 and the handheld portion B2 are embedded, the plurality of first air inlet holes B1-1 and the plurality of second air inlet holes B2-1 can be staggered or overlapped by rotating the handheld portion B1 or the handheld portion B2, so that the rotating speed of the rotatable fan blade group 310 with more than two stages can be controlled.

As shown in FIG. 2, as an example, two second air intake holes B2-1 are provided at the hand-held portion B2, and one first air intake hole B1-1 is provided at the hand-held portion B1. When the first air inlet hole B1-1 and one of the second air inlet holes B2-1 are completely overlapped, the overlapped air inlet area of the two air inlet holes reaches the maximum, two positions are provided for the air flow passage where the external air can enter the handle 100, namely the overlapped position of the first air inlet hole B1-1 and the second air inlet hole B2-1 and the air inlet 110, so that under the condition that the suction flow of the medical smoking machine is constant, the air cannot enter only from the air inlet 110, the flow of the external air entering from the air inlet 110 flowing in the air flow passage is reduced, the air kinetic energy acting on the rotatable fan blade group 310 with more than two stages is partially reduced, and the rotating speed of the rotatable fan blade group 310 with more than two stages is reduced; similarly, when the first air intake hole B1-1 and the two second air intake holes B2-1 are completely staggered, only the air inlet 110 is left at the position where the whole handle can enter air, the flow rate of the outside air entering the air inlet 110 is the highest, and the air kinetic energy of the outside air can completely act on the fan blades, so that the rotating speed of the rotatable fan blade group 310 with more than two stages is increased. The doctor can make the first air inlet hole B1-1 and the second air inlet hole B2-1 form different degrees of superposition/stagger by rotating the hand-held part B1 or the hand-held part B2 according to the actual operation requirement, thereby adjusting the size of the kinetic energy of the air acting on the fan blade group and changing the working rotating speed of the device. The number and size of the first air intake vent B1-1 and the second air intake vent B2-1 are not limited, and can be determined according to actual requirements, for example, when the size of the second air intake vent B2-1 is smaller, the second air intake vent B2-1 with a larger number can be arranged to cooperate with the first air intake vent B1-1 for speed regulation.

As shown in table 2, the rotation speed data of the driving device of the experimental sample C2001V4 in the speed adjusting process is shown, and the speed adjusting process is described with reference to the rotation speed data of table 2:

when the first air inlet hole B1-1 and the second air inlet hole B2-1 are completely staggered, so that the two air inlet holes are in a closed state (namely the air inlet areas of the first air inlet hole B1-1 and the second air inlet hole B2-1 are 0), the rotating speed of the rotatable fan blade group 310 with more than two stages reaches the maximum, and is about 80000 RPM;

when the first air inlet hole B1-1 and the second air inlet hole B2-1 are partially overlapped, namely the air inlet areas of the first air inlet hole B1-1 and the second air inlet hole B2-1 account for 50% of the total area of the air inlet holes, the two or more stages of rotatable fan blade sets 310 can realize the rotating speed of about 70000 RPM;

when the first intake vent B1-1 and the second intake vent B2-1 are completely overlapped, that is, the intake areas of all the first intake vent B1-1 and the second intake vent B2-1 reach the maximum, the rotating speed of the two or more stages of the rotatable fan blade sets 310 reaches the minimum, about 20000 RPM.

TABLE 2

As shown in FIG. 2, the handheld portion B1 is longer, the handheld portion B2 is shorter, and the position where the handheld portion B1 and the handheld portion B2 are rotatably engaged is provided at the rear end of the handheld portion B, so that the doctor does not easily block or cover the first air inlet hole B1-1 or the second air inlet hole B2-1 when operating the handle through the handheld portion B.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A surgically applicable negative pressure driven apparatus comprising:

the handle is provided with an air inlet and an air outlet and consists of a surgical operation part and a handheld part, the surgical operation part is used for entering the body of a patient or performing surgery on the body surface of the patient, and the handheld part is used for enabling a doctor to operate the handle; the air inlet is arranged at the front end of the operation part, the air outlet is arranged at the rear end of the handheld part, the air inlet and the air outlet are connected to form an air flow channel, and the air outlet is connected with the medical smoke extractor;

a drive shaft rotatably supported to the air inlet; a fan blade rotating assembly fixed to the driving shaft;

the medical smoking machine forms negative pressure in the air flow channel, so that external air enters the air flow channel from the air inlet, the fan blade rotating assembly is driven to rotate, and the rotation of the fan blade rotating assembly drives the driving shaft to rotate.

2. The negative pressure drive apparatus as claimed in claim 1, wherein the fan blade rotating assembly is a two-stage or more rotatable fan blade group; the air inlet is provided with a fixed fan blade; the two or more stages of rotatable fan blade sets are arranged in the middle or the rear end of the driving shaft.

3. The negative pressure driving apparatus according to claim 2, wherein the drive shaft is rotatably supported to the air intake port by being connected to bearings at a front end and a rear end thereof, respectively; and bearings connected with the front end and the rear end of the driving shaft are respectively positioned at two sides of the fan blade rotating assembly.

4. The negative pressure driving device according to any one of claims 1 to 3, wherein a speed regulating device is provided at a front end or a rear end of the hand-held portion, and the speed regulating device is used for controlling a flow rate of outside air entering the air flow passage.

5. The negative pressure driving apparatus according to claim 4, wherein the speed regulating device includes a first sub speed regulating member and a second sub speed regulating member, the first sub speed regulating member being rotatably fitted to the second sub speed regulating member;

a plurality of first air inlets are arranged at the embedded position of the first sub speed regulating part; a plurality of second air inlets are arranged at the embedding position of the second sub speed regulating part; the plurality of first air inlet holes and the plurality of second air inlet holes are matched to control the flow of external air entering the air flow channel.

6. The negative pressure driving apparatus according to any one of claims 2 to 3 or 5,

the number of the blades of each stage of fan blades of the two or more stages of rotatable fan blade groups ranges from 3 to 30; the hub ratio of each stage of fan blade ranges from 0.2 to 0.6; the range of the installation angle of each stage of fan blades is 70-80 degrees;

the number of the blades of the fixed fan blade ranges from 3 to 30, and the hub ratio of the fixed fan blade ranges from 0.3 to 0.8; the range of the installation angle of the fixed fan blades is 70-80 degrees.

7. The negative pressure driving apparatus according to any one of claims 1 to 3 or 5, further comprising: and the flow guide piece is arranged on the air inlet and exposed out of the handle.

8. The vacuum driven apparatus as in claim 7, wherein the deflector is flared outwardly.

9. The negative pressure drive apparatus of claim 8, wherein the flow guide is a sheet structure or an annular structure.

10. The negative pressure driving apparatus as claimed in claim 7, wherein the diversion member is made of transparent material or has a viewing gap.