CN111166973A

CN111166973A - Safe recovery equipment for medical syringe needle

Info

Publication number: CN111166973A
Application number: CN202010222239.9A
Authority: CN
Inventors: 方茜
Original assignee: Weihai Yiyi Medical Devices Co ltd
Current assignee: HUNAN HUIZE BIO-PHARMACEUTICAL Co.,Ltd.
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-05-19
Anticipated expiration: 2040-03-26
Also published as: CN111166973B

Abstract

The invention discloses a safe recovery device for a medical syringe needle, which comprises a machine body, wherein a separation cavity is arranged at the lower end in the machine body, the upper cavity wall of the machine body is provided with a feed inlet with the upper end communicated with the external space, the left side and the right side of the feed inlet are both provided with a transmission cavity, a plastic removing mechanism for removing the plastic on the needle head is arranged in the feeding port, a collecting mechanism for collecting the needle head after the collection treatment is finished is arranged in the transmission cavity, a separation mechanism for separating the needle head and the plastic part is arranged in the separation cavity, the plastic part on the needle head can be separated from the needle head during working, thereby the plastic part and the needle tubing part on the syringe needle are separated, and the separated plastic part and the separated needle tubing part can be separately collected, thereby not only effectively preventing the risk existing when the syringe needle is manually treated, but also achieving the purpose of collecting and treating the plastic and the metal in a classified manner.

Description

Safe recovery equipment for medical syringe needle

Technical Field

The invention relates to the field of mechanical and medical instruments, in particular to safe recovery equipment for a medical syringe needle.

Background

The needle is a medical instrument which is required to be used when a patient is injected with medicine, the needle is strictly disinfected and can only be used once, so that bacteria and viruses are prevented from being cross-infected in a human body, and the used needle needs to be timely treated.

At the present stage, the needle head is collected through medical personnel after being used, and the needle head is sharp, so that certain harm is possibly caused to a human body in the collection process, and the materials of the components of the needle head are not one, so that the needle head is necessary to be classified and collected.

Disclosure of Invention

The invention aims to solve the technical problem of providing safe recovery equipment for a medical injection needle, solving the problems that the needle is difficult to process and cannot be collected in a classified manner and the like, reducing the needle processing difficulty and increasing the functions of needle classified collection.

The invention is realized by the following technical scheme.

The invention relates to a safe recovery device for a medical syringe needle, which comprises a syringe body, wherein a separation cavity is arranged at the lower end in the syringe body, a feeding port with the upper end communicated with an external space is arranged on the upper cavity wall of the syringe body, a transmission cavity is respectively arranged at the left side and the right side of the feeding port, a plastic removing mechanism for removing plastic on the syringe needle is arranged in the feeding port, a collecting mechanism for collecting the syringe needle after the collection treatment is finished is arranged in the transmission cavity, and a separation mechanism for separating the syringe needle and a plastic syringe needle cylinder is arranged in the separation cavity;

the plastic removing mechanism comprises first driven cavities respectively positioned at the lower sides of the two transmission cavities, a rotating shaft is rotatably arranged between an upper cavity wall at the right end of the left transmission cavity and a lower cavity wall of the left first driven cavity, a rotating shaft is rotatably arranged between the upper cavity wall and the lower cavity wall of the left transmission cavity, the lower cavity wall of the left first driven cavity is rotatably provided with a rotating shaft, the upper end of the rotating shaft extends into the transmission cavity, a first driven gear positioned in the transmission cavity is arranged at the upper end of the rotating shaft, a rotating gear positioned in the first driven cavity is arranged at the lower end of the rotating shaft, a second driven belt wheel is arranged at the upper end of the rotating shaft, a sector gear capable of being meshed with the first driven gear is arranged at the lower end of the rotating shaft, a second driven gear capable of being meshed with the sector gear is arranged at the upper end of the rotating shaft, the first driven cavity and the transmission cavity on the right side are internally provided with structures which are the same as the structures of the rotating shaft, the rotating shaft and are bilaterally symmetrical, the left cavity wall and the right cavity wall at the lower end of the feed inlet are internally provided with opening cavities with inward openings, the lower ends in the two opening cavities are respectively provided with a clamping block which can move left and right in the cavity, an elastic spring is connected between the left end surface of the clamping block on the left side and the left cavity wall of the opening cavity on the left side, the elastic spring is connected between the right end surface of the clamping block on the right side and the right cavity wall of the opening cavity on the right side, the front end surface of the left end surface of the clamping block on the left side is respectively meshed with a first rack connected with the rotating gear on the left side, the right end surface of the clamping block on the right side is respectively fixed with a first rack connected, the upper end of the needle tube is a plastic needle cylinder, the upper ends of the two open cavities are respectively provided with a pressing block capable of moving left and right in the cavities, the left cavity wall and the right cavity wall of each open cavity are respectively provided with a tension spring connected with one end face of each pressing block, the left end face of each pressing block on the left side is fixedly provided with a second rack, the front end face of each pressing block on the left side is meshed with the corresponding rotating gear on the left side, and the right end face of each pressing block on the right side is fixedly provided with a second rack, the rear end face of each pressing block on.

Furthermore, the collecting mechanism comprises a motor fixed in the upper cavity wall of the transmission cavity on the left side, a second driven gear is arranged at the lower left end in the machine body, the lower end of the motor is in power connection with a transmission shaft, the lower end of the motor is in rotary connection with the lower cavity wall of the second driven gear, a first driving pulley and a second driving pulley which are positioned in the transmission cavity are arranged at the upper end of the transmission shaft, a second belt is arranged between the second driving pulley and the second driven pulley in a transmission connection manner, a driven shaft is arranged between the upper cavity wall and the lower cavity wall at the right end of the transmission cavity on the right side in a rotary manner, a first driven pulley is arranged at the upper end of the driven shaft, a first belt is arranged between the first driven pulley and the first driving pulley in a transmission connection manner, the second driving pulley is arranged at the lower end of the driven shaft, and a second belt is, the utility model discloses a separation chamber, including separation chamber, transmission shaft, collection chamber, separation chamber lower chamber wall, be equipped with the ascending collection chamber of opening in the separation chamber lower chamber wall, be equipped with the inward rotation chamber of opening in the chamber inner and outer chamber wall of collection chamber, it can be at intracavity pivoted turning block to rotate the intracavity to be equipped with, it is equipped with on the turning block inner wall to rotate the intracavity, the fixed outer swivel becket that is located of being equipped with in the turning block, it is equipped with interior swivel becket still to rotate in the collection chamber, interior swivel becket outer wall with fixed four equidistance distribution's of being equipped with connecting rod between the outer swivel becket inner wall, the fixed scraper blade that is equipped with of terminal surface under the connecting rod, the transmission shaft lower extreme be equipped with be located in the second.

Furthermore, the separating mechanism comprises a cam cavity positioned in the lower cavity wall of the separating cavity, the lower cavity wall of the cam cavity is rotatably provided with a rotating rod, the upper end of the rotating rod extends into the separating cavity, the upper end surface of the rotating rod is fixedly provided with a rotating disc positioned in the separating cavity, the lower end of the rotating rod is provided with a driven sprocket positioned in the cam cavity, the lower end of the transmission shaft is provided with a driving sprocket positioned in the second driven gear, a chain is arranged between the driving sprocket and the driven sprocket in a transmission connection manner, the rotating rod is provided with a cam positioned in the cam cavity in a middle friction connection manner, a power-on cavity is arranged in the right cavity wall of the cam cavity, the right end of the power-on cavity is fixedly provided with a power-on block, the left end of the power-on cavity is provided with a battery block capable of moving left and right in the cavity, and a tension spring is, the battery piece left end face is fixed and is equipped with the left end and stretches into sloping block in the cam intracavity, the rolling disc internal fixation is equipped with the electromagnetism piece, circular telegram piece upper end electricity is connected and is equipped with the electric wire, the electric wire up end with electromagnetism piece lower extreme contact electricity is connected.

Further, the sloping block is the inclined plane design, can contact with the inclined plane of sloping block during the cam corotation to promote sloping block and battery piece to move right, when the battery piece with move right to contradict with circular telegram piece left end face, the cam receives the inclined plane of sloping block to block and can not continue to rotate, the cam then rubs and skids on the bull stick, when the cam reversal, the cam can be blockked by another terminal surface on the non-inclined plane of sloping block, the cam also rubs and skids on the bull stick.

Furthermore, the elastic force of the elastic spring is larger than the friction force applied to the clamping block when the clamping block slides in the open cavity, and the pulling force of the tension spring is larger than the friction force applied to the pressing block when the pressing block slides left and right in the open cavity.

The invention has the beneficial effects that: the plastic needle separating device is simple in structure and convenient and fast to operate, and can separate the plastic part on the needle from the needle during working, so that the plastic part on the needle is separated from the needle tube part, and the separated plastic part and the needle tube part can be separately collected, thereby effectively preventing risks in manual needle treatment and achieving the purpose of plastic and metal classified collection and treatment.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

3 FIG. 32 3 is 3 a 3 schematic 3 structural 3 diagram 3 at 3 A 3- 3 A 3 in 3 FIG. 31 3 according 3 to 3 an 3 embodiment 3 of 3 the 3 present 3 invention 3; 3

FIG. 3 is a schematic structural diagram at B-B in FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram at C-C in FIG. 1 according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram at D-D in FIG. 1 according to an embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The safety recovery device for the medical injection needle, which is described with reference to fig. 1-5, comprises a body 10, a separation chamber 46 is arranged at the lower end in the body 10, a feeding opening 28 with the upper end communicated with the outside space is arranged on the upper wall of the body 10, a transmission chamber 39 is arranged on each of the left and right sides of the feeding opening 28, a plastic removing mechanism 45 for removing plastic on the needle is arranged in the feeding opening 28, a collecting mechanism 37 for collecting the needle after the collection treatment is arranged in the transmission chamber 39, a separating mechanism 57 for separating the needle from the plastic is arranged in the separation chamber 46, the plastic removing mechanism 45 comprises first driven chambers 22 respectively arranged on the lower sides of the two transmission chambers 39, a rotating shaft 31 is rotatably arranged between the upper wall at the right end of the transmission chamber 39 on the left side and the lower wall of the first driven chamber 22 on the left side, and a rotating shaft 32 is rotatably arranged between, a rotating shaft 19 with the upper end extending into the transmission cavity 39 is rotatably arranged on the lower cavity wall of the first driven cavity 22 on the left side, a first driven gear 30 positioned in the transmission cavity 39 is arranged at the upper end of the rotating shaft 31, a rotating gear 24 positioned in the first driven cavity 22 is arranged at the lower end of the rotating shaft 31, a second driven belt pulley 33 is arranged at the upper end of the rotating shaft 32, a sector gear 34 capable of being meshed and connected with the first driven gear 30 is arranged at the lower end of the rotating shaft 32, a second driven gear 42 capable of being meshed and connected with the sector gear 34 is arranged at the upper end of the rotating shaft 19, a rotating gear 17 positioned in the transmission cavity 39 is arranged at the lower end of the rotating shaft 19, the same structure as that the rotating shaft 19, the rotating shaft 32 and the rotating shaft 31 are bilaterally symmetrical is arranged in the first driven cavity 22 and the transmission cavity 39 on the right side, and an opening cavity 15 with an inward opening, the lower ends in the two open cavities 15 are respectively provided with a clamping block 13 which can move left and right in the cavity, an elastic spring 14 is connected between the left end surface of the clamping block 13 on the left side and the left cavity wall of the open cavity 15 on the left side, the elastic spring 14 is connected between the right end surface of the clamping block 13 on the right side and the right cavity wall of the open cavity 15 on the right side, the front end surface of the left end surface of the clamping block 13 on the left side is respectively engaged and connected with a first rack 16 of the rotating gear 17 on the left side, the right end surface of the clamping block 13 on the right side is respectively fixed with a first rack 16 of which the rear end surface is engaged and connected with the rotating gear 17 on the right side, two clamping blocks 13 are respectively provided with a limiting hole 72 with an inward opening, a needle tube 12 can be inserted into the limiting hole 72, the upper end of the needle tube 12 is a plastic needle tube 29, and the upper, the left cavity wall and the right cavity wall of the open cavity 15 are respectively provided with a tension spring 26 which is respectively connected with one end face of two pressing blocks 27, the left end face of the pressing block 27 on the left side is fixedly provided with a second rack 25, the front end face of the second rack is meshed with the rotating gear 24 on the left side, and the right end face of the pressing block 27 on the right side is fixedly provided with a second rack 25, the rear end face of the second rack is meshed with the rotating gear 24.

Advantageously, the collecting mechanism 37 includes a motor 36 fixed in the upper cavity wall of the left side transmission cavity 39, a second driven gear 53 is arranged at the lower left end of the machine body 10, a transmission shaft 41 with a lower end rotatably connected with the lower cavity wall of the second driven gear 53 is arranged at the lower end of the motor 36 in a power connection manner, a first driving pulley 38 and a second driving pulley 40 which are arranged in the transmission cavity 39 are arranged at the upper end of the transmission shaft 41, a second belt 35 is arranged between the second driving pulley 40 and the second driven pulley 33 in a transmission connection manner, a driven shaft 20 is rotatably arranged between the upper and lower cavity walls at the right end of the right side transmission cavity 39, a first driven pulley 21 is arranged at the upper end of the driven shaft 20, a first belt 23 is arranged between the first driven pulley 21 and the first driving pulley 38 in a transmission connection manner, and the second driving pulley 40 is arranged at the lower end of the driven, a second belt 35 is also arranged between the second driving pulley 40 and the second driven pulley 33 on the right side in a transmission manner, a collection chamber 69 with an upward opening is arranged in the lower chamber wall of the separation chamber 46, a rotating chamber 52 with an inward opening is arranged in the inner chamber wall and the outer chamber wall of the collection chamber 69, a rotating block 50 capable of rotating in the chamber is arranged in the rotating chamber 52, an outer rotating ring 49 positioned in the collection chamber 69 is fixedly arranged on the inner wall of the rotating block 50, an inner rotating ring 47 is also rotatably arranged in the collection chamber 69, four connecting rods 48 which are distributed at equal intervals are fixedly arranged between the outer wall of the inner rotating ring 47 and the inner wall of the outer rotating ring 49, a scraper 56 is fixedly arranged on the lower end face of each connecting rod 48, a driving gear 51 which is positioned in the second driven gear 53 and is engaged and connected with the outer wall of the rotating block 50 is arranged at the lower end of the transmission shaft 41, and a discharge hole 68 communicated with, a collection chamber 66 may be positioned on the underside of the outlet port 68 to receive the separated needles.

Beneficially, the separating mechanism 57 includes a cam cavity 61 located in a lower cavity wall of the separating cavity 46, the lower cavity wall of the cam cavity 61 is rotatably provided with a rotating rod 60, an upper end of the rotating rod 60 extends into the separating cavity 46, an upper end face of the rotating rod 60 is fixedly provided with a rotating disc 11 located in the separating cavity 46, a lower end of the rotating rod 60 is provided with a driven sprocket 59 located in the cam cavity 61, a lower end of the transmission shaft 41 is provided with a driving sprocket 54 located in the second driven gear 53, a chain 55 is arranged between the driving sprocket 54 and the driven sprocket 59 in a transmission connection manner, the rotating rod 60 is provided with a cam 58 located in the cam cavity 61 in a middle friction connection manner, a power-on cavity 65 is arranged in a right cavity wall of the cam cavity 61, a power-on block 67 is fixedly arranged at a right end in the power-on cavity 65, a left end in the power-on cavity 65 is provided with a battery block 64 capable of moving left and right in the cavity, a tension spring 63 is arranged between a left end face of the battery block 64 and, the fixed left end that is equipped with of battery piece 64 left end face stretches into sloping block 62 in the cam chamber 61, the fixed electromagnetism piece 71 that is equipped with in the rolling disc 11, the electrical block 67 upper end electricity connects and is equipped with electric wire 70, electric wire 70 up end with electromagnetism piece 71 lower extreme contact electricity is connected.

Advantageously, the cam 58 is designed as a ramp, and when the cam 58 rotates forwards, the cam will contact with the ramp of the ramp 62, so as to push the ramp 62 and the battery block 64 to move to the right, when the battery block 64 moves to the right to interfere with the left end face of the energizing block 67, the cam 58 will be blocked by the ramp of the ramp 62 and will not rotate any further, the cam 58 will slide on the rotating rod 60 by friction, when the cam 58 rotates backwards, the cam 58 will be blocked by the other end face of the ramp 62, which is not the ramp, and the cam 58 will also slide on the rotating rod 60 by friction.

Advantageously, the elastic force of the elastic spring 14 is greater than the friction force applied to the clamping block 13 when sliding in the open cavity 15, and the tension of the tension spring 26 is greater than the friction force applied to the pressing block 27 when sliding left and right in the open cavity 15.

In an initial state, the two pressing blocks 27 are respectively located in the two open cavities 15 under the tensile force of the two tension springs 26, the two clamping blocks 13 are respectively located in the feeding port 28 under the elastic force of the two elastic springs 14, the battery block 64 is located at the left end of the power-on cavity 65 under the tensile force of the tension spring 63, and the battery block 64 and the power-on block 67 are in a non-contact state.

When the plastic on the needle head is separated, the needle head is put into the feeding port 28, the metal part is positioned in the limiting holes 72 in the two clamping blocks 13, the plastic part is positioned on the upper sides of the two clamping blocks 13, the motor 36 is started, the motor 36 works to drive the transmission shaft 41 and the first driving pulley 38, the second driving pulley 40, the driving gear 51 and the driving sprocket 54 on the transmission shaft 41 to rotate, the first driving pulley 38 drives the first driven pulley 21 connected with the first driving pulley through the first belt 23 to rotate, so as to drive the driven shaft 20 and the second driving pulley 40 at the lower end of the driven shaft 20 to rotate, the two second driving pulleys 40 simultaneously rotate and respectively drive the two same second driven pulleys 33 to rotate through the second belt 35, so as to drive the two same rotating shafts 32 to rotate and have the same rotating speed, the two rotating shafts 32 rotate and drive the two sector gears 34 to rotate, when the two rotating shafts 32 respectively rotate to be meshed with the two first driven gears 30, at the moment, the sector gear 34 and the second driven gear 42 are in a disengaged state, the sector gear 34 rotates to drive the first driven gear 30 engaged with the sector gear to rotate, so as to drive the two rotating shafts 31 and the rotating gear 24 at the lower end of the rotating shafts 31 to rotate respectively, the two rotating gears 24 rotate to drive the two second racks 25 engaged with the two rotating gears to move relatively, so as to drive the two pressing blocks 27 to move relatively to crush the plastic syringe 29, when the two sector gears 34 rotate to disengage from the first driven gear 30 and engage with the second driven gear 42, the two pressing blocks 27 and the second racks 25 move oppositely under the pulling force of the two tension springs 26 to reset, at the moment, the sector gear 34 rotates to drive the second driven gear 42 engaged with the sector gear to rotate, so as to drive the rotating shaft 19 and the rotating gear 17 at the lower end of the rotating shaft 19 to rotate, the two rotary gears 17 rotate to respectively drive the two first racks 16 which are meshed and connected with the two rotary gears to move oppositely, and after the two clamping blocks 13 move oppositely, the needle tube 12 and the crushed plastic needle cylinder 29 fall into the separation cavity 46 from the feeding port 28;

when the plastic syringe 29 and the needle tube 12 are collected separately, the driving sprocket 54 rotates to drive the driven sprocket 59 which is connected with the driving sprocket to rotate through the chain 55, thereby driving the rotating rod 60 and the driven sprocket 59 on the rotating rod 60 and the rotating disk 11 to rotate, the cam 58 rotates to push the inclined block 62 and the battery block 64 rightwards, the battery block 64 is in contact with the electrifying block 67 to be electrified, the electromagnetic block 71 is electrified to generate magnetism, the rotating disk 11 also has magnetism under the action of the electromagnetic block 71, the needle tube 12 falling into the separation cavity 46 from the feeding port 28 is adsorbed by the rotating disk 11, the plastic syringe 29 can not be adsorbed by the needle tube 12 and is thrown into the collection cavity 69 under the rotation of the rotating disk 11, the driving gear 51 rotates to drive the rotating block 50 which is in meshed connection with the driving gear to rotate, thereby driving the outer rotating ring 49, the connecting rod 48 and the scraper 56 to rotate, the scraper 56 rotates to collect and scrape the feeding port 28 in the collection cavity 69 into the discharging, and then collected by the collecting box 66, when collecting the needle tube 12, only need the start motor 36 to work in reverse, thus drive the cam 58 to rotate in reverse through mechanical transmission, the cam 58 can't push the sloping block 62 to move to the right in reverse, thus the battery block 64 can't contact with the electrifying block 67, the electric wire 70 can't work in electrifying, the needle tube 12 on the rotating disc 11 can't be adsorbed, get into the collecting cavity 69 under the rotating action of the rotating disc 11, and then drop from the discharge hole 68 through the collection of the scraper 56 and collect.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a medical syringe needle safety recovery plant, includes the fuselage, its characterized in that: the lower end in the machine body is provided with a separation cavity, the upper cavity wall of the machine body is provided with a feed opening, the upper end of the feed opening is communicated with the external space, the left side and the right side of the feed opening are respectively provided with a transmission cavity, a plastic removing mechanism for removing plastic on the needle head is arranged in the feed opening, a collecting mechanism for collecting the needle head after the collection treatment is finished is arranged in the transmission cavity, and a separation mechanism for separating the needle head from the plastic needle cylinder is arranged in the separation cavity;

2. The safety recovery device for medical needles according to claim 1, wherein: the collecting mechanism comprises a motor fixed in the upper cavity wall of the transmission cavity on the left side, a second driven gear is arranged at the lower left end in the machine body, a transmission shaft with the lower end rotatably connected with the lower cavity wall of the second driven gear is arranged at the lower end of the motor in a power connection manner, a first driving belt wheel and a second driving belt wheel which are positioned in the transmission cavity are arranged at the upper end of the transmission shaft, a second belt is arranged between the second driving belt wheel and the second driven belt wheel in a transmission connection manner, a driven shaft is arranged between the upper cavity wall and the lower cavity wall at the right end of the transmission cavity on the right side in a rotation manner, a first driven belt wheel is arranged at the upper end of the driven shaft, a first belt is arranged between the first driven belt wheel and the first driving belt wheel in a transmission connection manner, the second driving belt wheel is arranged at the lower end of the, the utility model discloses a separation chamber, including separation chamber, transmission shaft, collection chamber, separation chamber lower chamber wall, be equipped with the ascending collection chamber of opening in the separation chamber lower chamber wall, be equipped with the inward rotation chamber of opening in the chamber inner and outer chamber wall of collection chamber, it can be at intracavity pivoted turning block to rotate the intracavity to be equipped with, it is equipped with on the turning block inner wall to rotate the intracavity, the fixed outer swivel becket that is located of being equipped with in the turning block, it is equipped with interior swivel becket still to rotate in the collection chamber, interior swivel becket outer wall with fixed four equidistance distribution's of being equipped with connecting rod between the outer swivel becket inner wall, the fixed scraper blade that is equipped with of terminal surface under the connecting rod, the transmission shaft lower extreme be equipped with be located in the second.

3. The safety recovery device for medical needles according to claim 1, wherein: the separating mechanism comprises a cam cavity positioned in the lower cavity wall of the separating cavity, the lower cavity wall of the cam cavity is rotatably provided with a rotating rod, the upper end of the rotating rod extends into the separating cavity, the upper end surface of the rotating rod is fixedly provided with a rotating disc positioned in the separating cavity, the lower end of the rotating rod is provided with a driven sprocket positioned in the cam cavity, the lower end of the transmission shaft is provided with a driving sprocket positioned in the second driven gear, the driving sprocket and the driven sprocket are connected in a transmission way and provided with a chain, the rotating rod is provided with a cam positioned in the cam cavity in a middle friction connection way, the right cavity wall of the cam cavity is internally provided with a power-on cavity, the right end of the power-on cavity is fixedly provided with a power-on block, the left end of the power-on cavity is provided with a battery block capable of moving left and right in the cavity, a tension spring is connected between the left end surface of the battery block and the left cavity wall, the rotating disc internal fixation is equipped with the electromagnetism piece, circular telegram piece upper end electricity is connected and is equipped with the electric wire, the electric wire up end with electromagnetism piece lower extreme contact electricity is connected.

4. The safety recovery device for medical needles according to claim 3, wherein: the sloping block is the inclined plane design, can contact with the inclined plane of sloping block during cam corotation to promote sloping block and battery piece and move right, when the battery piece with move right to contradict with circular telegram piece left end face, the cam receives the inclined plane of sloping block to block and can not continue to rotate, the cam then rubs and skids on the bull stick, when the cam reversal, the cam can be blockked by another terminal surface on the non-inclined plane of sloping block, the cam also rubs and skids on the bull stick.

5. The safety recovery device for medical needles according to claim 1, wherein: the elasticity of the elastic spring is larger than the friction force applied when the clamping block slides in the open cavity, and the pulling force of the tension spring is larger than the friction force applied when the pressing block slides left and right in the open cavity.