CN113018593A

CN113018593A - Medical device for treating diabetes

Info

Publication number: CN113018593A
Application number: CN202110307458.1A
Authority: CN
Inventors: 吴晓燕; 赵艳茹; 崔波; 浮姣; 刘淑; 张晴; 郭辉; 朱本章
Original assignee: First Affiliated Hospital of Medical College of Xian Jiaotong University
Current assignee: First Affiliated Hospital of Medical College of Xian Jiaotong University
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-06-25
Anticipated expiration: 2041-03-23
Also published as: CN113018593B

Abstract

The invention discloses a medical device for treating diabetes, which comprises a shell, wherein an injection inner core capable of moving back and forth and a needle head detachably mounted at the front end of the injection inner core are arranged in an inner cavity of the shell, a medicine bottle for supplying medicine to the injection inner core is also arranged in the inner cavity of the shell, the injection inner core comprises a core barrel, a piston rod, a sliding part and a liquid suction needle, the piston of the core barrel is arranged in the inner cavity of the core barrel in a sliding manner, the piston rod is connected to one side of the piston and extends out of one end of the core barrel, the other end of the core barrel is provided with an injection port connected with the needle head, the extending end of the piston rod is connected to one side of the sliding part, the liquid suction needle is mounted on the other side of the sliding part. The invention can prevent air from entering the injection port at the front end of the core barrel in the process of replacing the needle head, and can prevent residual liquid from being expanded by heating and seeping out of the injection port when the device is stored in a state that the one-way switch valve is closed.

Description

Medical device for treating diabetes

Technical Field

The invention belongs to the field of medical supplies, and relates to a medical device for treating diabetes.

Background

In the current diabetes treatment, regular injections of insulin based on the patient's condition are the conventional treatment. When the condition of the patient is serious, the patient often needs insulin intensive treatment, namely 3-4 times of insulin injection every day, the method needs multiple injections every day, and the injections are frequent, so that in the prior art, a plurality of injection molding devices, such as insulin pens, which can facilitate the patient to carry out subcutaneous injection are provided for the patient to carry out regular injection by himself so as to control the condition of the diabetes. The needle needs to be replaced every time of injection, so that some injection devices which can conveniently replace the needle or even automatically replace the needle appear, but when a patient or relatives of the patient use the injection devices in the using process, the patient often forgets to exhaust gas in a needle cylinder or an injection cavity before injection, and the injection dose and the injection effect are influenced during injection. And the gas in the injection cavity is mostly entered during the process of replacing the needle and inhaling the liquid medicine. In addition, another problem frequently occurring is that a small amount of liquid medicine often remains in the injection cavity of the inner core of the injection device for multiple times, when the injection device is in travel and in working process, a user can not always clean the inner core in time after each injection, so that the phenomenon that residual liquid seeps out from the needle is often generated when the injection device is stored, because the storage of insulin needs to be maintained at a lower temperature, the residual liquid in the injection device is easy to expand due to heating after the injection, the situation that the injection device and the surrounding environment are polluted due to the seepage of the needle is generated, and the concentration of the residual liquid after the seepage is influenced to a certain extent, so that certain errors are generated in the next injection.

Disclosure of Invention

The invention aims to provide a medical device for treating diabetes, which aims to solve the technical problems that in the prior art, an injection device capable of quickly replacing a needle head cannot avoid air from entering an injection cavity when the needle head is replaced and liquid medicine is sucked, so that a patient must exhaust gas during each injection, and residual liquid after injection is easy to seep out of the needle head when the injection device is naturally stored to pollute the injection device and the surrounding environment.

The medical device for treating diabetes comprises a shell, an injection inner core capable of moving back and forth and a needle head detachably mounted at the front end of the injection inner core are arranged in an inner cavity of the shell, a medicine bottle for supplying medicine to the injection inner core is further arranged in the inner cavity of the shell, the injection inner core comprises a core barrel, a piston rod, a sliding part and a liquid suction needle, the piston of the core barrel is slidably arranged in the inner cavity of the core barrel, the piston rod is connected to one side of the piston and extends out of one end of the core barrel, the other end of the core barrel is provided with an injection port connected with the needle head, the extending end of the piston rod is connected to one side of the sliding part, the liquid suction needle is mounted at the other side of the sliding part, the liquid suction needle is inserted into the medicine bottle to suck medicine liquid, and a driving rod extending, the liquid suction needle is communicated with the inner cavity of the core barrel through a liquid suction channel, the injection port is provided with a one-way switch valve only allowing the liquid to flow towards the needle head, the liquid suction channel is provided with a one-way valve only allowing the liquid to flow towards the core barrel, the one-way switch valve is controlled to be opened and closed through a switch part moving perpendicular to the moving direction of the injection inner core, the switch part is connected with the core barrel in a sliding mode through a sliding structure, the left side and the right side of the switch part are symmetrically and fixedly provided with extended sliding columns, the inner side of the shell is provided with a sliding chute matched with the sliding columns for driving the switch part to ascend and descend, the sliding chute comprises a low position groove positioned at the front part and a high position groove positioned at the middle part and an obliquely arranged transition groove, the transition groove is used for connecting the low position groove and the high position groove, the front part of the high position groove is positioned at the position for replacing the needle, the middle part of the high position groove is the staying position of the injection port in a storage state.

Preferably, the check switch valve is the film valve, including valve body, film and valve plate, the valve body is equipped with water inlet, delivery port and valve pocket, the film is located in the valve pocket and cover on the water inlet, the delivery port aperture is less than the film stretches out towards the film, the valve plate with switch member fixed connection and from the downside slip peg graft in the valve pocket and, the valve plate with keep sealed between the valve body the water inlet is opened towards the delivery port hunch-up to the film under the open mode, under the closed mode, push down after inserting on the valve plate the film seals the water inlet.

Preferably, the sliding chute further comprises a linear connecting groove which is in linear communication with the low position grooves at two ends, a separating part for separating the linear connecting groove from the high position groove is arranged between the linear connecting groove and the high position groove, a first elastic blocking piece is arranged at the front end of the separating part, a second elastic blocking piece is arranged at the other end of the separating part, the first elastic blocking piece seals the end part of the linear connecting groove at the position under the natural state and is opened when being extruded by the rear side, and the second elastic blocking piece seals the end part of the corresponding transition groove at the position under the natural state and is opened when being extruded by the upper side.

Preferably, the front part of the core barrel is detachably mounted on a front sliding assembly which slides in the inner cavity of the shell, the front sliding assembly is provided with a protruding part which extends to the lower part of the injection port, and the switch piece is vertically inserted into a switch groove on the protruding part in a sliding mode.

Preferably, the front side of the switch slot is provided with a bearing sheet accommodating slot, the front lower part of the switch piece is connected with an elastic bearing piece which obliquely extends forwards and upwards, the elastic bearing piece is provided with a bearing slot for bearing the root of the needle head when the new needle head falls down, the top of the front side of the bearing sheet accommodating slot is provided with a pressing part which extends backwards and is used for pressing the elastic bearing piece to enable the elastic bearing piece to bend backwards when the switch piece descends, the front upper part of the switch piece is fixedly provided with a pressing piece, the pressing piece is provided with a chute which is opened downwards, and the chute and the elastic bearing piece press the falling new needle head towards the injection port when the switch piece descends.

Preferably, the root of the needle head is provided with an annular groove, when the root of the needle head is in compression connection with the injection port, the upper end of the elastic supporting piece is extruded by the extruding part to be clamped in the annular groove, and when the switch piece ascends, the upper end of the elastic supporting piece presses the annular groove forwards and upwards to eject the used needle head.

Preferably, the front sliding assembly comprises a front arc plate for supporting the core barrel and a connecting ring fixed on the front arc plate, the front portion of the core barrel is in threaded connection with the connecting ring and enables the injection port to extend forwards, a sliding positioning column is fixedly connected to the lower portion of the connecting ring, a limiting groove in sliding fit with the sliding positioning column is arranged in an inner cavity of the shell, a quantitative adjusting mechanism is arranged at the rear end, away from the needle head, of the limiting groove, a limiting structure for limiting the backward movement position of the sliding part is fixedly arranged in the shell, the quantitative adjusting mechanism controls the movement distance of the piston relative to the core barrel when the liquid medicine is absorbed through forward and backward adjustment of the quantitative plate abutting against the sliding positioning column, and the front end of the limiting groove is used for limiting the core barrel during injection.

Preferably, quantitative adjustment mechanism still includes screw rod installed part, adjusting screw, flexible round bar, worm wheel, worm and adjust knob, the screw rod installed part is fixed in the shell, be equipped with on the screw rod installed part and rotate the connection adjusting screw and follow the through-hole that the fore-and-aft direction set up, adjusting screw's front portion is equipped with the screw thread and inserts with sliding the through-hole the one end threaded connection of flexible round bar, flexible round bar other end fixed connection the quantitative board, the section of stretching out at adjusting screw rear portion is installed the worm wheel, the worm left right direction set up and with the worm wheel meshing, the worm stretches out one end and is connected with adjust knob.

Preferably, the medicine bottle with the slider is arranged in on the back sliding assembly, back sliding assembly includes back arc board and medicine bottle layer board, back arc board front end with slider fixed connection, the medicine bottle layer board be the arc with back arc board sliding connection, medicine bottle layer board downside is equipped with sliding connection piece, sliding connection piece with guide slot sliding connection on the back arc board.

Preferably, the inner chamber of shell has at least one side to articulate in the left and right sides to have a syringe needle bearing board and be equipped with and hold syringe needle bearing board's layer board holding tank, syringe needle bearing board with through torsional spring coupling between the shell, the rear end of layer board holding tank is used for the butt syringe needle bearing board makes it keep setting about under the torsional spring effect, syringe needle bearing board bearing when setting about the syringe needle, will when the injection inner core antedisplacement syringe needle bearing board impresses the layer board holding tank.

The invention has the technical effects that: 1. this scheme is through setting up one-way switch valve and switch spare, let the injection port of core bucket front end can avoid letting the air intake at the in-process of changing the syringe needle, deposit this device simultaneously under the state of closing one-way switch valve and also can prevent the raffinate owing to thermal expansion oozes from injection port or syringe needle, absorb the liquid medicine through the imbibition needle in this device of on the other hand, the liquid medicine keeps in contact with the imbibition needle and isolates its tip and air, inhale the air when avoiding absorbing the liquid medicine, consequently this device prevents simultaneously that air admission injection chamber and raffinate from oozing, the relevant problem that prior art exists has been overcome, the person of facilitating the use uses this device injection insulin and guarantees this device and does not cause the liquid medicine to ooze when inconvenient washing.

2. The scheme is that the new fallen needle head is supported by the elastic supporting piece and the needle head supporting plate, the sliding groove drives the switch piece to descend through the sliding column when the driving rod is pulled backwards, then the root of the needle head is in press fit connection with the injection port through the cooperative action of the switch piece, the press fit piece and the elastic supporting piece, the reliability of connection is guaranteed, meanwhile, operation is convenient, the same action is adopted when the used old needle head is removed, the sliding groove drives the switch piece to ascend through the sliding column, and the elastic supporting piece ejects the old needle head out through the cooperative action of the switch piece, the press fit piece and the elastic supporting piece. Therefore, the needle head is replaced by simple operation of pulling the driving rod in one direction, the action process and the switch of the one-way switch valve are cooperated through the switch piece, the change between the switch states of the one-way switch valve in the process of replacing the needle head can be guaranteed, and errors possibly caused by respective operation are avoided.

3. The structure and the using mode of injection inner core in this scheme cooperate the ration adjustment mechanism that this scheme provided, can adjust the injection volume accurately, and the operation mode has fairly simplely to turn into the straight line through twice speed reduction with rotatory process and adjust the ration board, consequently can the accurate change of adjusting the amount of inhaled medicine.

Drawings

Fig. 1 is a schematic structural view of a medical device for diabetes treatment according to the present invention.

Fig. 2 is a schematic view showing the structure of the injection core in the structure shown in fig. 1.

Figure 3 is a cross-sectional view of the structure of figure 1 with the plunger encased by the upper outer and inner shells.

Fig. 4 is a cross-sectional view of the structure shown in fig. 3 in the direction a-a.

Fig. 5 is an enlarged view of the region a of the structure shown in fig. 4.

Fig. 6 is an enlarged view of the region B of the structure shown in fig. 4.

Fig. 7 is an enlarged view of the region of structure C shown in fig. 4.

Fig. 8 is a schematic view of the chute and slide post of the structure of fig. 4 in a stored condition of the device.

Fig. 9 is a schematic view of the runner and slide post of the arrangement of fig. 8 when a new needle is replaced.

Fig. 10 is a schematic view of the slide slot and slide post of the configuration of fig. 8 with the needle extended from the housing.

Fig. 11 is a partial cross-sectional view from a side view of the structure of fig. 1.

The labels in the figures are: 1. a housing, 101, an upper housing, 102, a lower housing, 103, a chute, 1031, a low-position slot, 1032, a transition slot, 1033, a high-position slot, 1034, a linear connection slot, 1035, a second resilient flap, 1036, a first resilient flap, 1037, a divider, 104, a needle support plate, 105, a plate receiving slot, 106, a limiting structure, 107, a watch housing, 108, a drive slot, 2, a needle, 201, a needle body, 202, a root, 203, a protrusion, 204, an annular groove, 3, an injection core, 301, a core barrel, 302, a front arc plate, 303, a connection ring, 304, a switch, 305, a press fit, 306, a resilient support member, 307, an extension member, 3071, a support plate receiving slot, 3072, a squeeze, 308, a slide post, 309, a slide positioning post, 310, a piston rod, 311, a slide, 312, a drive rod, 313, a back arc plate, 3131, a medicine bottle, a guide slot, 3133, a guide slot, a straight line, a straight, The device comprises a sliding connection block, 314, a medicine bottle, 315, a liquid suction needle, 316, a one-way valve, 317, a liquid suction channel, 318, a piston, 319, a one-way switch valve, 3191, a valve body, 3192, a valve cavity, 3193, a water inlet, 3194, a film, 3195, a valve plate, 3196, a water outlet, 320, an injection port, 4, a needle supply box, 5, a needle collection box, 6, a trigger structure, 601, a winding drum, 602, a guy cable, 603, a front pressure connecting rod, 7, a quantitative adjusting mechanism, 701, a quantitative plate, 702, a telescopic round rod, 703, a screw rod mounting piece, 704, an adjusting screw rod, 705, an extension section, 706, a worm wheel, 707 and a worm.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.

As shown in fig. 1 to 11, the present invention provides a medical device for diabetes treatment, which comprises a housing 1, wherein an injection core 301 capable of moving back and forth and a needle 2 detachably mounted at the front end of the injection core 301 are arranged in an inner cavity of the housing 1, and a medicine bottle 314 for supplying medicine to the injection core 301 is further arranged in the inner cavity of the housing 1. The injection inner core 301 comprises a core barrel 301, a piston 318, a piston rod 310, a sliding member 311 and a liquid suction needle 315, the piston 318 is slidably arranged in the inner cavity of the core barrel 301, the piston rod 310 is connected to one side of the piston 318 and extends out from one end of the core barrel 301, the other end of the core barrel 301 is provided with an injection port 320 connected with the needle 2, the extending end of the piston rod 310 is connected to one side of the sliding member 311, the liquid suction needle 315 is installed on the other side of the sliding member 311, the liquid suction needle 315 is inserted into the medicine bottle 314 to suck medicine liquid, the sliding member 311 is provided with a driving rod 312 extending out of the shell 1 for driving the sliding member 311 to move, the liquid suction needle 315 is communicated with the inner cavity of the core barrel 301 through a liquid suction channel 317, the injection port 320 is provided with a one-way switch valve 319 only allowing the flow towards the needle 2, the liquid suction channel 317 is provided with a, the one-way switch valve 319 is controlled to be opened and closed by a switch member 304 moving perpendicular to the moving direction of the injection core 301, the switch member 304 is connected with the core barrel 301 in a sliding manner through a sliding structure, the left and right sides of the switch member 304 are symmetrically fixed with a projecting sliding column 308, the inner side of the housing 1 is provided with a sliding chute 103 matched with the sliding column 308 for driving the switch member 304 to move up and down, the sliding chute 103 comprises a low-position groove 1031 located at the front and rear parts, a high-position groove 1033 located at the middle part and an obliquely arranged transition groove 1032, the transition groove 1032 is used for connecting the low-position groove 1031 and the high-position groove 1033, the front part of the high-position groove 1033 is located at the position for replacing the needle head 2 and the rear part is located at the position for replacing the new needle head 2, and the middle part of the high-position groove 1033 is located at the position.

The one-way switch valve 319 is a film valve and comprises a valve body 3191, a film 3194 and a valve plate 3195, the valve body 3191 is provided with a water inlet 3193, a water outlet 3196 and a valve cavity 3192, the film 3194 is arranged in the valve cavity 3192 and covers the water inlet 3193, the aperture of the water outlet 3196 is smaller than that of the film 3194 and extends out towards the film 3194, the valve plate 3195 is fixedly connected with the switch member 304 and is inserted into the valve cavity 3192 in a sliding manner from the lower side, the seal is kept between the valve plate 3195 and the valve body 3191, the film 3194 arches towards the water outlet 3196 to open the water inlet 3193 in an opening state, and the film 3194 seals the water inlet 3193 after being inserted on the valve plate 3195 in a closing state.

The chute 103 further includes a linear connecting groove 1034 linearly connecting the low position grooves 1031 at both ends, a separating portion 1037 separating the two low position grooves 1031 from the high position groove 1033 is provided between the linear connecting groove 1034 and the high position groove 1033, a first elastic blocking piece 1036 is provided at a front end of the separating portion 1037, and a second elastic blocking piece 1035 is provided at the other end, the first elastic blocking piece 1036 naturally seals an end portion of the linear connecting groove 1034 at the position and opens when being pressed at the rear side, and the second elastic blocking piece 1035 naturally seals an end portion of the corresponding transition groove 1032 at the position and opens when being pressed at the upper side.

The front part of the core barrel 301 is detachably mounted on a front sliding assembly sliding in the inner cavity of the housing 1, the front sliding assembly is provided with a protruding part 307 protruding below the injection port 320, and the switch member 304 is vertically inserted into a switch groove on the protruding part 307 in a sliding manner.

The front side of the switch slot is provided with a supporting sheet accommodating groove 3071, the front lower part of the switch piece 304 is connected with an elastic supporting piece 306 which obliquely extends forwards and upwards, the elastic supporting piece 306 is provided with a supporting groove for supporting the root 202 of the needle 2 when a new needle 2 falls down, the top of the front side of the supporting sheet accommodating groove 3071 is provided with a pressing part 3072 which extends backwards and is used for pressing the elastic supporting piece 306 to enable the elastic supporting piece to bend backwards when the switch piece 304 descends, the front upper part of the switch piece 304 is fixed with a pressing piece 305, the pressing piece 305 is provided with a chute which is opened downwards, and the chute and the elastic supporting piece 306 press the fallen new needle 2 to the injection port 320 when the switch piece 304 descends.

The root 202 of the needle 2 has an annular groove 204, when the root 202 of the needle 2 is tightly connected with the injection port 320, the upper end of the elastic supporting member 306 is pressed by the pressing portion 3072 to be clamped in the annular groove 204, and when the switch member 304 is lifted, the upper end of the elastic supporting member 306 presses the annular groove 204 forwards and upwards to eject the used needle 2.

The front sliding assembly comprises a front arc plate 302 for supporting the core barrel 301 and a connecting ring 303 fixed on the front arc plate 302, the front part of the core barrel 301 is in threaded connection with the connecting ring 303 and enables the injection port 320 to extend forwards, a sliding positioning column 309 is fixedly connected below the connecting ring 303, a limiting groove in sliding fit with the sliding positioning column 309 is arranged in an inner cavity of the shell 1, a quantitative adjusting mechanism 7 is arranged at the rear end of the limiting groove far away from the needle 2, a limiting structure 106 for limiting the backward movement position of the sliding piece 311 is fixedly arranged in the shell 1, the quantitative adjusting mechanism 7 controls the movement distance of the piston 318 relative to the core barrel 301 when the liquid medicine is sucked by adjusting a quantitative plate 701 which abuts against the sliding positioning column 309 back and forth, and the front end of the limiting groove is used for limiting the core barrel 301 when the liquid medicine is injected.

Quantitative adjustment mechanism 7 still includes screw rod installed part 703, adjusting screw 704, flexible round bar 702, worm wheel 706, worm 707 and adjust knob, screw rod installed part 703 is fixed in shell 1, be equipped with on the screw rod installed part 703 and rotate the connection adjusting screw 704 and the through-hole that sets up along the fore-and-aft direction, adjusting screw 704's front portion be equipped with the screw thread and with the slip insert the through-hole flexible round bar 702's one end threaded connection, flexible round bar 702 other end fixed connection the quantitative board 701, the section 705 that stretches out at adjusting screw 704 rear portion is installed worm wheel 706, worm 707 left and right sides direction set up and with worm wheel 706 meshes, worm 707 stretches out one end and is connected with adjust knob.

The shell 1 comprises an upper shell 101 and a lower shell 1, the lower shell 1 comprises a back shell 102 and a surface shell 107, the screw rod mounting piece 703 is fixed between the back shell 102 and the surface shell 107, and driving grooves 108 which are in sliding fit with the driving rods 312 are formed on the left side and the right side after the upper shell 101 and the lower shell 1 are connected.

The medicine bottle 314 and the sliding piece 311 are arranged on a rear sliding assembly, the rear sliding assembly comprises a rear arc plate 313 and a medicine bottle supporting plate 3131, the front end of the rear arc plate 313 is fixedly connected with the sliding piece 311, the medicine bottle supporting plate 3131 is arc-shaped and is in sliding connection with the rear arc plate 313, a sliding connection block 3133 is arranged on the lower side of the medicine bottle supporting plate 3131, and the sliding connection block 3133 is in sliding connection with a guide groove 3132 on the rear arc plate 313.

The inner chamber of shell 1 has at least one side to articulate in the left and right sides to have syringe needle bearing board 104 and be equipped with and hold syringe needle bearing board 104's layer board holding tank 105, syringe needle bearing board 104 with through torsional spring connection between the shell 1, the rear end of layer board holding tank 105 is used for the butt syringe needle bearing board 104 makes it keep setting about under the torsional spring effect, syringe needle bearing board 104 supports when setting about syringe needle 2, will when injecting inner core 301 antedisplacement syringe needle bearing board 104 impresses layer board holding tank 105.

The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution of the invention, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The utility model provides a medical device for diabetes treatment, includes shell (1), be equipped with injection inner core (301) that can the back-and-forth movement and demountable installation in the inner chamber of shell (1) syringe needle (2) of injection inner core (301) front end, still be equipped with in the inner chamber of shell (1) for medicine bottle (314) that injection inner core (301) supplied medicine, its characterized in that: the injection inner core (301) comprises a core barrel (301), a piston (318), a piston rod (310), a sliding part (311) and a liquid suction needle (315), the piston (318) is arranged in the inner cavity of the core barrel (301) in a sliding manner, the piston rod (310) is connected to one side of the piston (318) and extends out of one end of the core barrel (301), an injection port (320) connected with the needle head (2) is arranged at the other end of the core barrel (301), the extending end of the piston rod (310) is connected to one side of the sliding part (311), the liquid suction needle (315) is arranged at the other side of the sliding part (311), the liquid suction needle (315) is inserted into the medicine bottle (314) to suck liquid medicine, a driving rod (312) extending out of the shell (1) and used for driving the sliding part (311) to move is arranged on the sliding part (311), and the liquid suction needle (315) is communicated with the inner cavity of the core barrel (301), the injection port (320) is provided with a one-way switch valve (319) which only allows the flow towards the needle head (2), the liquid suction channel (317) is provided with a one-way valve (316) which only allows the flow towards the core barrel (301), the one-way switch valve (319) is controlled to be opened and closed by a switch member (304) which moves perpendicular to the moving direction of the injection core (301), the switch member (304) is connected with the core barrel (301) in a sliding manner through a sliding structure, the left side and the right side of the switch member (304) are symmetrically fixed with a projecting sliding column (308), the inner side of the shell (1) is provided with a sliding chute (103) which is matched with the sliding column (308) and used for driving the switch member (304) to ascend and descend, the sliding chute (103) comprises a low-position groove (1031) at the front part and the rear part, a high-position groove (1033) at the middle part and an obliquely arranged transition groove (1032), and the transition groove (1032) is used for connecting the low-position groove (1031), the front part of the high-position groove (1033) is at the position of replacing the needle head (2) and the rear part is at the position of replacing a new needle head (2), and the middle part of the high-position groove (1033) is the staying position of the injection port (320) in the storage state.

2. A medical device for the treatment of diabetes according to claim 1, wherein: the one-way switch valve (319) is a film valve and comprises a valve body (3191), a film (3194) and a valve plate (3195), the valve body (3191) is provided with a water inlet (3193), a water outlet (3196) and a valve cavity (3192), the film (3194) is arranged in the valve cavity (3192) and covers the water inlet (3193), the aperture of the water outlet (3196) is smaller than that of the film (3194) and extends out towards the film (3194), the valve plate (3195) is fixedly connected with the switch piece (304) and is inserted into the valve cavity (3192) in a sliding mode from the lower side, sealing is kept between the valve plate (3195) and the valve body (3191), the film (3194) arches towards the water outlet (3196) in an opening state to open the water inlet (3193), and in a closing state, the valve plate (3195) is inserted upwards and then presses the film (3194) to close the water inlet (3193).

3. A medical device for the treatment of diabetes according to claim 2, characterized in that: the sliding chute (103) further comprises a linear connecting groove (1034) which is in linear communication with the low-position grooves (1031) at two ends, a separating part (1037) which is used for separating the linear connecting groove (1034) from the high-position groove (1033) is arranged between the linear connecting groove (1034) and the high-position groove, a first elastic blocking piece (1036) is arranged at the front end of the separating part (1037), a second elastic blocking piece (1035) is arranged at the other end of the separating part (1037), the first elastic blocking piece (1036) naturally seals the end part of the linear connecting groove (1034) at the position and is opened when being squeezed at the rear side, and the second elastic blocking piece (1035) naturally seals the end part of the corresponding transition groove (1032) at the position and is opened when being squeezed at the upper side.

4. A medical device for the treatment of diabetes according to claim 3, characterized in that: the front part of the core barrel (301) is detachably arranged on a front sliding assembly which slides in the inner cavity of the shell (1), the front sliding assembly is provided with a protruding part (307) protruding below the injection port (320), and the switch piece (304) is vertically inserted into a switch groove on the protruding part (307) in a sliding mode.

5. A medical device for the treatment of diabetes according to claim 4, wherein: the novel syringe needle device is characterized in that a supporting sheet accommodating groove (3071) is formed in the front side of the switch groove, an elastic supporting piece (306) extending towards the upper front side in an inclined mode is connected to the front lower portion of the switch piece (304), the elastic supporting piece (306) is provided with a supporting groove for supporting the root portion (202) of the new syringe needle (2) when the new syringe needle (2) falls down, an extruding portion (3072) extending backwards and used for extruding the elastic supporting piece (306) to enable the elastic supporting piece (306) to bend backwards when the switch piece (304) descends is arranged at the top of the front side of the supporting sheet accommodating groove (3071), a pressing piece (305) is fixed to the front upper portion of the switch piece (304), an inclined groove with a downward opening is formed in the pressing piece (305), and the inclined groove and the elastic supporting piece (306) extrude the new syringe needle (2) falling down towards the injection port (320) when the switch piece (304.

6. A medical device for the treatment of diabetes according to claim 5, wherein: the root part (202) of the needle (2) is provided with an annular groove (204), when the root part (202) of the needle (2) is in compression connection with the injection port (320), the upper end of the elastic supporting piece (306) is pressed by the pressing part (3072) to be clamped in the annular groove (204), and when the switch piece (304) ascends, the upper end of the elastic supporting piece (306) presses the annular groove (204) forwards and upwards to eject the used needle (2).

7. A medical device for the treatment of diabetes according to claim 6, wherein: the front sliding assembly comprises a front arc plate (302) for supporting the core barrel (301) and a connecting ring (303) fixed on the front arc plate (302), the front part of the core barrel (301) is in threaded connection with the connecting ring (303) and the injection port (320) extends forwards, a sliding positioning column (309) is fixedly connected below the connecting ring (303), a limiting groove in sliding fit with the sliding positioning column (309) is arranged in an inner cavity of the shell (1), a quantitative adjusting mechanism (7) is arranged at the rear end of the limiting groove far away from the needle head (2), a limiting structure (106) for limiting the backward movement position of the sliding part (311) is fixedly arranged in the shell (1), the quantitative adjusting mechanism (7) controls the movement distance of the piston (318) relative to the core barrel (301) during the liquid medicine suction through forward and backward adjustment of a quantitative plate (701) which is pressed against the sliding positioning column (309), the front end of the limiting groove is used for limiting the core barrel (301) during injection.

8. The medical device for the treatment of diabetes according to claim 7, characterized in that: the quantitative adjusting mechanism (7) also comprises a screw mounting piece (703), an adjusting screw (704), a telescopic round rod (702), a worm wheel (706), a worm (707) and an adjusting knob, the screw mounting piece (703) is fixed in the shell (1), a through hole which is rotationally connected with the adjusting screw (704) and is arranged along the front-back direction is arranged on the screw mounting piece (703), the front part of the adjusting screw rod (704) is provided with threads and is in threaded connection with one end of the telescopic round rod (702) which is inserted into the through hole in a sliding way, the other end of the telescopic round rod (702) is fixedly connected with the quantitative plate (701), the extended section (705) at the rear part of the adjusting screw rod (704) is provided with the worm wheel (706), the worm (707) is arranged in the left-right direction and meshed with the worm wheel (706), and one end, extending out of the worm (707), of the worm is connected with the adjusting knob.

9. A medical device for the treatment of diabetes according to claim 8, wherein: medicine bottle (314) with slider (311) is arranged in on the back sliding assembly, back sliding assembly includes back arc board (313) and medicine bottle layer board (3131), back arc board (313) front end with slider (311) fixed connection, medicine bottle layer board (3131) be the arc with back arc board (313) sliding connection, medicine bottle layer board (3131) downside is equipped with sliding connection piece (3133), sliding connection piece (3133) with guide slot (3132) sliding connection on the back arc board (313).

10. A medical device for the treatment of diabetes according to claim 9, wherein: the inner chamber of shell (1) has at least one side to articulate in the left and right sides to have syringe needle bearing board (104) and is equipped with and holds the layer board holding tank (105) of syringe needle bearing board (104), syringe needle bearing board (104) with through torsional spring coupling between shell (1), the rear end of layer board holding tank (105) is used for the butt syringe needle bearing board (104) makes it keep setting about under the torsional spring effect, syringe needle bearing board (104) bearing when setting up about syringe needle (2), will when injection inner core (301) move forward syringe needle bearing board (104) are impressed layer board holding tank (105).