CN115501420A - Medical liquid conveying system - Google Patents
Medical liquid conveying system Download PDFInfo
- Publication number
- CN115501420A CN115501420A CN202211293403.0A CN202211293403A CN115501420A CN 115501420 A CN115501420 A CN 115501420A CN 202211293403 A CN202211293403 A CN 202211293403A CN 115501420 A CN115501420 A CN 115501420A
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- Prior art keywords
- gear
- pawl
- suction
- conveying
- trigger
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- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 98
- 230000000670 limiting effect Effects 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 206010061218 Inflammation Diseases 0.000 description 1
- 208000025865 Ulcer Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000036269 ulceration Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14216—Reciprocating piston type
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
Abstract
The invention discloses a medical liquid conveying system, and relates to the field of medical instruments. The technical scheme is characterized by comprising a shell, wherein the shell is connected with an injector jacket, and a rack is arranged in the shell; one end of the rack is provided with a sealing rubber plug matched with the outer sleeve of the injector, and the other end of the rack penetrates out of the shell; a transmission gear meshed with the rack, a conveying gear driving assembly and a suction gear driving assembly which are respectively matched with the transmission gear are arranged in the shell; a directional adjustment assembly used for limiting the rotation direction of the transmission gear is arranged in the shell, so that the transmission gear comprises a first state of rotating only along the conveying direction and a second state of rotating only along the suction direction; the conveying gear drive assembly comprises a conveying gear arranged in a floating mode, and the suction gear drive assembly comprises a suction gear arranged in a floating mode. The invention can respectively carry out the conveying and the suction of liquid, and has reliable transmission and good stability.
Description
Technical Field
The present invention relates to the field of medical devices, and more particularly, to a medical fluid delivery system.
Background
Chinese patent No. CN105212984B, discloses a system for treating veins comprising a dispenser gun, a syringe, an adapter and a catheter, the dispenser gun comprising a control, a retaining segment and a dispenser plunger, actuation of the control causing the dispenser plunger to advance the syringe plunger distally in the central lumen when a slot at the distal end of the adapter mates with a syringe flange of the syringe, effecting a delivery action. The dispenser gun includes a trigger and a spring mechanism that also includes a spring finger that is adjusted to allow one or more teeth of the plunger to move forward through the adapter and squeeze the syringe to dispense glue or adhesive when the trigger is depressed.
However, the system of the above patent also has the following problems: 1. the application of the spring claw has the risk of failure, so that the conveying can not be realized after the trigger is pressed; 2. the delivered adhesive is not only present in the target area but also distributed over the site, such as the puncture site, causing undesirable closure, inflammation, ulceration, etc. at these sites, due to the residual adhesive on the catheter end as the catheter is withdrawn, which adheres to the puncture site during withdrawal.
The problem 2 is that the system of the above patent only performs the feeding operation by the pressing trigger, but does not have the pressing and sucking functions. If the plunger is pulled directly to perform suction, it is difficult to control the amount of suction, and the problem of excessive suction is easily caused.
Disclosure of Invention
In view of the disadvantages of the prior art, an object of the present invention is to provide a medical fluid delivery system, which can respectively perform fluid delivery and suction, and has reliable transmission and good stability.
In order to achieve the purpose, the invention provides the following technical scheme:
a medical liquid delivery system comprises a shell, wherein the shell is connected with an injector outer sleeve, and a rack is arranged in the shell; one end of the rack is provided with a sealing rubber plug matched with the outer sleeve of the injector, and the other end of the rack penetrates out of the shell;
a transmission gear meshed with the rack, a conveying gear driving assembly and a suction gear driving assembly which are respectively matched with the transmission gear are arranged in the shell;
an orientation adjusting assembly used for limiting the rotation direction of the transmission gear is arranged in the shell, so that the transmission gear comprises a first state of rotating only in the conveying direction and a second state of rotating only in the suction direction;
the conveying gear driving assembly comprises a conveying trigger and a conveying gear arranged in a floating mode; the transmission gear is switched to a first state, the conveying gear can be driven to revolve and shift while rotating by pressing the conveying trigger, and the conveying gear and the transmission gear are switched to a meshing state from a separation state; after the conveying trigger is reset, the conveying gear and the transmission gear are switched to a separation state from a meshing state;
the suction gear drive assembly comprises a suction trigger and a floatingly arranged suction gear; switching a transmission gear to a second state, wherein pressing the suction trigger can drive the suction gear to rotate and perform revolution deviation at the same time, so that the suction gear and the transmission gear are switched from a separation state to an engagement state; and after the suction trigger is reset, the suction gear and the transmission gear are switched from the meshing state to the separation state.
Further, the conveying gear is connected with a conveying gear shaft, and a conveying arc groove matched with the conveying gear shaft is formed in the shell; pressing the conveying trigger, rotating the conveying gear around the conveying gear shaft, and moving the conveying gear shaft in the conveying arc groove to make the conveying gear perform revolution deviation;
the suction gear is connected with a suction gear shaft, and a suction arc groove matched with the suction gear shaft is arranged in the shell; pressing the suction trigger causes the suction gear to rotate around the suction gear shaft while the suction gear shaft moves within the suction arc groove, so that the suction gear undergoes orbital displacement.
Further, a conveying trigger gear part meshed with the conveying gear is arranged on the conveying trigger, and a suction trigger gear part meshed with the suction gear is arranged on the suction trigger.
Further, the delivery trigger and the suction trigger are respectively connected with an elastic reset piece.
Further, drive gear include with rack toothing's transmission internal tooth, transmission internal tooth both sides be provided with respectively with delivery gear complex first transmission external tooth, and with suction gear complex second transmission external tooth.
Further, the orientation adjustment assembly includes:
a directional gear engaged with the transmission gear;
a rotatable first pawl;
a first resilient member acting on said first pawl such that said first pawl has a tendency to deflect in a direction approaching the directional gear;
a rotatable second pawl;
a second resilient member acting on said second pawl such that said second pawl has a tendency to deflect in a direction approaching the directional gear; and (c) a second step of,
the rotatable adjusting block is positioned between the first pawl and the second pawl;
under the limit of the adjusting block, the first pawl is engaged with the directional gear, the second pawl is separated from the directional gear, and the transmission gear is in a first state; and rotating the adjusting block to separate the first pawl from the directional gear, and engaging the second pawl with the directional gear, so that the transmission gear is in a second state.
Further, under the limit of the adjusting block, the first pawl, the second pawl and the directional gear are separated, and then the transmission gear is in a third state capable of rotating freely.
Furthermore, the adjusting block comprises a first limiting plane and a second limiting plane which are symmetrically arranged, and a limiting arc surface connected between the first limiting plane and the second limiting plane;
when the limiting arc surfaces are respectively contacted with the first pawl and the second pawl, the first pawl and the second pawl are separated from the directional gear;
rotating the adjusting block to enable the limiting arc surface to be in contact with the second pawl, the first limiting plane to be in contact with the first pawl, the second pawl is separated from the directional gear, and the first pawl is connected with the directional gear;
and rotating the regulating block to enable the limiting arc surface to be in contact with the first pawl, and the second limiting plane to be in contact with the second pawl, so that the first pawl is separated from the directional gear, and the second pawl is engaged with the directional gear.
Furthermore, the regulating block is connected with a regulating shaft, and the regulating shaft is connected with a toggle knob positioned on the outer side of the shell.
Furthermore, the first elastic piece is a first spring, and a first fixing plate is arranged on the inner wall of the shell; one end of the first spring is in contact with the first pawl, and the other end of the first spring is connected with the first fixing plate;
the second elastic piece is a second spring, and a second fixing plate is arranged on the inner wall of the shell; one end of the second spring is in contact with the second pawl, and the other end of the second spring is connected with the second fixing plate.
Further, the directional gear includes coaxially arranged positioning external teeth meshing with the transmission gear and directional internal teeth for engaging with the first pawl or the second pawl.
In conclusion, the invention has the following beneficial effects:
1. the conveying gear driving assembly and the suction gear driving assembly can be used for respectively conveying and sucking liquid, so that a small amount of liquid can be sucked back after conveying to prevent the liquid from contacting with an unexpected position, for example, the bad phenomenon caused by adhesive residue is effectively reduced, the system does not need to be disassembled, and the matching transmission of the teeth and the teeth is favorable for improving the reliability of transmission and reducing the risk of failure of the conveying system;
2. the conveying gear and the suction gear are in floating arrangement, so that unidirectional transmission can be respectively performed, and interference is avoided;
3. the displacement value of the rack is fixed every time the conveying trigger or the suction trigger is pressed, so that the aim of quantitative conveying or suction can be fulfilled;
4. the rotation direction of the transmission gear is limited by the directional adjusting assembly, so that misoperation can be avoided, and the limit of the rack is favorable for improving the accuracy of quantification;
5. simple structure, convenient equipment, low in production cost, stability is good.
Drawings
FIG. 1 is a first schematic diagram of a medical fluid delivery system according to an embodiment;
FIG. 2 is a schematic diagram of a second embodiment of a medical fluid delivery system;
FIG. 3 is a third schematic diagram of an embodiment of a medical fluid delivery system;
FIG. 4 is a fourth schematic structural view of a medical fluid delivery system according to an embodiment;
FIG. 5 is a schematic structural view of the housing in the embodiment;
FIG. 6 is a first schematic structural view of an orientation adjustment assembly in an embodiment;
FIG. 7 is a schematic structural diagram of an adjusting block, an adjusting shaft and a toggle knob in the embodiment;
FIG. 8 is a second schematic structural view of the orientation adjustment assembly of the embodiment;
FIG. 9 is a third schematic structural view of the orientation regulating assembly in the embodiment.
In the figure: 1. a housing; 11. a first through hole; 12. a second through hole; 13. a card slot; 14. a guide clamping groove; 15. a conveying arc chute; 16. a suction arc groove; 17. a third through hole; 2. a syringe jacket; 21. a tail wing; 22. a luer fitting; 31. sealing the rubber plug; 32. a push rod; 33. a rack; 34. a holding section; 35. a guide plate; 4. a transmission gear; 41. driving the internal teeth; 42. a first drive outer gear; 43. a second drive outer gear; 44. a drive gear shaft; 51. a conveying gear; 511. a conveying gear shaft; 52. a conveying trigger; 521. a conveying trigger gear part; 522. a first elastic sheet; 61. a suction gear; 611. a suction gear shaft; 62. a suction trigger; 621. a suction trigger gear part; 622. a second elastic sheet; 7. a directional gear; 71. orienting the outer teeth; 72. orienting the internal teeth; 73. a directional gear shaft; 81. a first spring; 811. a first fixing plate; 82. a second spring; 821. a second fixing plate; 83. a first pawl; 831. a first pawl shaft; 84. a second pawl; 841. a second pawl shaft; 851. an adjusting block; 8511. limiting the arc surface; 8512. a first limit plane; 8513. a second limit plane; 852. an adjustment shaft; 853. the knob is pulled.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the present invention.
Example (b):
a medical fluid delivery system, referring to fig. 1 to 9, comprising a housing 1, the housing 1 being connected to a syringe jacket 2, the housing 1 being provided with a rack 33; one end of the rack 33 is provided with a sealing rubber plug 31 matched with the injector outer sleeve 2, and the other end penetrates out of the shell 1; in the embodiment, a transmission gear 4 meshed with the rack 33, a conveying gear driving component and a suction gear driving component which are respectively matched with the transmission gear 4 are arranged in the shell 1; an orientation adjustment assembly for defining the rotation direction of the transmission gear 4 is arranged in the shell 1, so that the transmission gear 4 comprises a first state of rotating only in the conveying direction and a second state of rotating only in the suction direction; the conveying gear drive assembly comprises a conveying trigger 52 and a conveying gear 51 arranged in a floating manner; the transmission gear 4 is switched to a first state, and the conveying gear 51 can be driven to perform revolution deviation while rotating by pressing the conveying trigger 52, so that the conveying gear 51 and the transmission gear 4 are switched to a meshing state from a separation state; after the conveying trigger 52 is reset, the conveying gear 51 and the transmission gear 4 are switched from the meshing state to the separation state; the suction gear drive assembly includes a suction trigger 62 and a floatingly disposed suction gear 61; switching the transmission gear 4 to the second state, pressing the suction trigger 62 can drive the suction gear 61 to perform revolution deviation while rotating, so that the suction gear 61 and the transmission gear 4 are switched from the disengaged state to the engaged state; after the suction trigger 62 is reset, the suction gear 61 and the transmission gear 4 are switched from the engaged state to the disengaged state.
Referring to fig. 1 to 9, in the present embodiment, the conveying and the suction of the liquid can be performed by using the conveying gear driving assembly and the suction gear driving assembly, respectively, and then the liquid can be sucked back by a small amount after being conveyed so as to prevent the liquid from contacting undesired positions, for example, the bad phenomenon caused by adhesive residue can be effectively reduced; taking the conveying gear driving component as an example, in the process of pressing the conveying trigger 52, the conveying gear 51 can move to be meshed with the transmission gear 4 and drive the transmission gear 4 to rotate, the transmission gear 4 drives the rack 33 to move, and the rack 33 drives the sealing rubber plug 31 to compress the liquid in the injector jacket 2, so that the liquid is conveyed; after the conveying trigger 52 is reset, the conveying gear 51 is separated from the transmission gear 4, and the rack 33 is not influenced by the resetting process; therefore, the displacement of the rack 33 advancing by pressing the conveying trigger 52 each time is a fixed value, thereby achieving the effect of quantitative conveying; in a similar way, the quantitative suction effect can be realized by utilizing the suction gear driving assembly; in the embodiment, the transmission is realized by matching the teeth, so that the transmission reliability can be effectively improved, and the risk of failure of the conveying system is reduced; in the embodiment, the rotation direction of the transmission gear 4 is defined by using the orientation adjustment assembly, so that misoperation can be avoided, for example, when the delivery trigger 52 needs to be pressed to carry out liquid delivery, if the suction trigger 62 is pressed, the transmission gear 4 cannot be driven to rotate, and the convenience and the safety reliability of the operation of the delivery system are improved; meanwhile, the rotation direction of the transmission gear 4 is limited by the directional adjusting assembly, and the condition that the rack 33 returns after one-time displacement is executed can be avoided, for example, after the rack 33 moves forward, because the transmission gear 4 cannot rotate reversely, the rack 33 cannot move backward, and therefore the accuracy of quantitative conveying can be improved.
Referring to fig. 1 to 3, in particular, in the present embodiment, the conveying gear 51 is connected with a conveying gear shaft 511, and a conveying arc groove 15 matched with the conveying gear shaft 511 is arranged in the housing 1; when the conveying trigger 52 is pressed, the conveying gear 51 rotates around the conveying gear shaft 511, and the conveying gear shaft 511 moves in the conveying arc groove 15, so that the conveying gear 51 performs revolution deviation; preferably, the conveying gear shaft 511 is in clearance fit with the conveying arc groove 15; the transfer arc chute 15 includes a lower end and an upper end, the transfer gear 51 is separated from the transmission gear 4 when the transfer gear shaft 511 is located at the lower end of the transfer arc chute 15, and the transfer gear 51 is engaged with the transmission gear 4 when the transfer gear shaft 511 moves to the upper end of the transfer arc chute 15.
Referring to fig. 1 to 3, in detail, the suction gear 61 is connected with a suction gear shaft 611, and a suction arc groove 16 engaged with the suction gear shaft 611 is provided in the housing 1; pressing the suction trigger 62, the suction gear 61 rotates on its own axis about the suction gear shaft 611 while the suction gear shaft 611 moves within the suction arc chute 16, so that the suction gear 61 performs a revolution shift; preferably, the suction gear shaft 611 is in clearance fit with the suction arc groove 16; the suction arc chute 16 includes a lower end and an upper end, the suction gear 61 is in a separated state from the transmission gear 4 when the suction gear shaft 611 is located at the lower end in the suction arc chute 16, and the suction gear 61 is engaged with the transmission gear 4 when the suction gear shaft 611 moves to the upper end in the suction arc chute 16.
Referring to fig. 1 to 3, in particular, in this embodiment, a conveying trigger gear portion 521 meshed with the conveying gear 51 is disposed on the conveying trigger 52, meanwhile, a conveying trigger shaft is symmetrically disposed on the conveying trigger 52, and a shaft sleeve matched with the conveying trigger shaft is disposed on an inner wall of the housing 1, so that the conveying trigger 52 can rotate around the conveying trigger shaft; when the transport trigger 52 is pressed, the transport trigger 52 is deflected inward, and the transport trigger gear portion 521 is engaged with the transport gear 51, so that the transport gear 51 can be driven to rotate; the conveying gear 51 revolves and shifts along the conveying arc chute 15 while rotating, and the conveying trigger gear portion 521 is kept in a meshed state with the conveying gear 51, that is, the conveying gear 51 revolves and shifts in the conveying arc chute 15 around the conveying trigger shaft.
Referring to fig. 1 to 3, in particular, in the present embodiment, a suction trigger gear portion 621 engaged with the suction gear 61 is provided on the suction trigger 62, meanwhile, a suction trigger shaft is symmetrically provided on the suction trigger 62, and a shaft sleeve engaged with the suction trigger shaft is provided on the inner wall of the housing 1, so that the suction trigger 62 can rotate around the suction trigger shaft; when the suction trigger 62 is pressed, the suction trigger 62 is deflected inward, and the suction trigger gear portion 621 meshes with the suction gear 61, so that the suction gear 61 can be driven to rotate; the suction gear 61 performs the orbital shift along the suction arc chute 16 while rotating, and the suction trigger gear portion 621 maintains the meshed state with the suction gear 61, that is, the suction gear 61 performs the orbital shift in the suction arc chute 16 around the suction trigger shaft.
Referring to fig. 1, the delivery trigger 52 and the suction trigger 62 are respectively connected with elastic returning members so as to be automatically returned by elastic force in the present embodiment; specifically, in the present embodiment, the elastic restoring member connected to the conveying trigger 52 is a first elastic sheet 522, one end of the first elastic sheet 522 is connected to the conveying trigger 52, and the other end of the first elastic sheet is abutted to the outer side wall of the housing 1; when the conveying trigger 52 is pressed, the conveying trigger 52 presses the first elastic piece 522, so that the first elastic piece 522 is deformed, and after the conveying trigger 52 is released, the first elastic piece 522 releases elastic force to drive the conveying trigger 52 to reset; in this embodiment, the elastic restoring member connected to the suction trigger 62 is a second elastic piece 622, one end of the second elastic piece 622 is connected to the suction trigger 62, and the other end abuts against the inner wall of the housing 1; when the suction trigger 62 is pressed, the suction trigger 62 presses the second elastic piece 622, so that the second elastic piece 622 is deformed, and after the suction trigger 62 is released, the second elastic piece 622 releases the elastic force to drive the suction trigger 62 to reset; of course, in other alternative embodiments, the elastic restoring element may also be selected from other types of elastic elements, including a torsion spring, a tension spring, a compression spring, and the like, without limitation; the casing 1 in this embodiment includes a handle portion, and the delivery trigger 52 and the suction trigger 62 are respectively located on opposite sides of the handle portion, so that arrangement can be facilitated and erroneous operation can be avoided; the structural configuration and mounting location of the delivery trigger 52 and the suction trigger 62 may be adjusted as desired and are not limited herein.
Referring to fig. 1 to 3, in the present embodiment, the transmission gear 4 includes an internal transmission gear 41 engaged with the rack 33, and the internal transmission gear 41 is provided at both sides thereof with a first external transmission gear 42 engaged with the conveying gear 51 and a second external transmission gear 43 engaged with the suction gear 61, so that the structural arrangement can be optimized to avoid an interference situation.
Referring to fig. 1 to 9, specifically, the orientation adjusting assembly in the present embodiment includes:
the directional gear 7 is meshed with the transmission gear 4, and the directional gear 7 is meshed with the transmission gear 4;
a rotatable first pawl 83, specifically, the first pawl 83 is connected with a first pawl shaft 831, and the inner wall of the housing 1 is provided with a shaft sleeve matched with the first pawl shaft 831, so that the first pawl 83 can rotate around the first pawl shaft 831;
a first elastic member acting on the first pawl 83 so that the first pawl 83 has a tendency to deflect in a direction approaching the directional gear 7, i.e., the first pawl 83 tends to engage with the directional gear 7 under the elastic force of the first elastic member;
the rotatable second pawl 84, specifically, the second pawl shaft 841 is connected to the second pawl 84, and a shaft sleeve matched with the second pawl shaft 841 is arranged on the inner wall of the housing 1, so that the second pawl 84 can rotate around the second pawl shaft 841;
a second elastic member acting on the second pawl 84 so that the second pawl 84 has a tendency to deflect in a direction approaching the directional gear 7, i.e., the second pawl 84 tends to engage with the directional gear 7 under the elastic force of the second elastic member; and (c) a second step of,
Referring to fig. 1 to 9, specifically, wherein the first pawl 83 is engaged with the directional gear 7 and the second pawl 84 is disengaged from the directional gear 7 under the limit of the regulation block 851, the transmission gear 4 is in the first state; after the first pawl 83 is jointed with the directional gear 7, the directional gear 7 can only rotate along the clockwise direction, the transmission gear 4 meshed with the directional gear 7 can only rotate along the anticlockwise direction, and when the transmission gear 4 rotates anticlockwise, the rack 33 is driven to advance to convey liquid medicine; rotating the regulation block 851 such that the first pawl 83 is disengaged from the directional gear 7 and the second pawl 84 is engaged with the directional gear 7, the transmission gear 4 is in the second state; after the second pawl 84 is engaged with the directional gear 7, the directional gear 7 can only rotate in the counterclockwise direction, the transmission gear 4 engaged with the directional gear 7 can only rotate in the clockwise direction, and the transmission gear 4 rotates in the clockwise direction to drive the rack 33 to retreat for sucking liquid medicine; that is, the directional gear 7 of the present embodiment cooperates with the first pawl 83 and the second pawl 84 to form a bi-directionally adjustable clutch, which has the advantages of simple structure, convenient arrangement and low cost; of course, in other alternative embodiments, the orientation adjustment assembly may take other configurations, such as two clutch gears in opposite directions, and the two clutch gears are driven axially to engage with the transmission gear to define the rotation direction of the transmission gear.
Referring to fig. 1 to 9, preferably, under the limit of the adjusting block 851, the first pawl 83 and the second pawl 84 are both separated from the directional gear 7, and the transmission gear 4 is in a third state of being capable of freely rotating; when the transmission gear 4 can rotate freely, the transmission gear can directly convey or suck liquid medicine conveniently through the rack 33, and the convenience of operation of a conveying system is improved; specifically, in this embodiment, the adjusting block 851 includes a first limiting plane 8512 and a second limiting plane 8513 that are symmetrically arranged, and a limiting arc surface 8511 connected between the first limiting plane 8512 and the second limiting plane 8513; specifically, the first limit plane 8512 and the second limit plane 8513 are arranged in an intersecting manner; when the limiting arc surface 8511 is respectively contacted with the first pawl 83 and the second pawl 84, the first pawl 83 and the second pawl 84 are separated from the directional gear 7; rotating the regulating block 851 so that the limit arc surface 8511 is in contact with the second pawl 84 and the first limit plane 8512 is in contact with the first pawl 83, the second pawl 84 is separated from the steering gear 7 and the first pawl 83 is deflected to engage the steering gear 7; rotating the adjusting block 851 so that the limit arc surface 8511 is in contact with the first pawl 83 and the second limit plane 8513 is in contact with the second pawl 84, the first pawl 83 is separated from the directional gear 7, and the second pawl 84 is deflected to engage with the directional gear 7; in the embodiment, the first pawl 83 and the second pawl 84 are respectively controlled by one adjusting block 851, so that the structure is simple and the control is convenient; by adopting the limiting arc surface 8511, when the adjusting block 851 rotates, the limiting arc surface 8511 can realize the continuous limiting effect, so that the adjustment is convenient; for example, the adjusting block 851 is rotated to enable the limit arc surface 8511 to be simultaneously contacted with the first pawl 83 and the second pawl 84, the adjustment is carried out such that the limit arc surface 8511 is contacted with the second pawl 84, and the limit arc surface 8511 is separated from the first pawl 83, and in the process, the limit arc surface 8511 is always contacted with the second pawl 84, and continuous limit is realized.
Referring to fig. 1 to 9, preferably, the first elastic member is a first spring 81, and a first fixing plate 811 is disposed on an inner wall of the housing 1; one end of the first spring 81 is in contact with the first pawl 83, and the other end is connected to the first fixing plate 811; the second elastic element is a second spring 82, and a second fixing plate 821 is arranged on the inner wall of the shell 1; one end of the second spring 82 is in contact with the second pawl 84, and the other end is connected to the second fixing plate 821; in the embodiment, the first spring 81 and the second spring 82 are used as elastic members, so that the installation and the arrangement can be convenient; of course, in other alternative embodiments, the elastic member may also be selected from other structures, such as a torsion spring, etc., without limitation; preferably, the directional gear 7 in the present embodiment includes a directional outer tooth 71 and a directional inner tooth 72 coaxially arranged, the directional outer tooth 71 is engaged with the transmission inner tooth 41, and the directional inner tooth 72 is used to engage with the first pawl 83 or the second pawl 84; the external directional teeth 71 and the internal directional teeth 72 can be designed separately, so that the external directional teeth 71 can be stably meshed with the internal transmission teeth 41, and the internal directional teeth 72 can simultaneously realize a clutch function with the first pawls 83 and the second pawls 84, thereby improving the reliability of the conveying system.
Referring to fig. 1 to 9, specifically, in the present embodiment, a push rod 32 is disposed between the sealing rubber plug 31 and the rack 33, and the push rod 32 extends into the syringe jacket 2, so as to avoid interference; preferably, the side walls of the rack 33 are symmetrically provided with guide plates 35, a guide clamping groove 14 matched with the guide plates 35 is arranged in the housing 1, and the guide plates 35 and the guide clamping groove 14 are matched to play a role in limiting and guiding, so that the rack 33 can only move in a linear direction; specifically, in the present embodiment, the housing 1 includes two half shells, and a guide slot 14 is respectively disposed on an inner side wall of each half shell; in this embodiment, a first through hole 11, a clamping groove 13 and a second through hole 12 which are sequentially communicated and arranged are arranged at the end part of the housing 1 connected with the injector jacket 2, an empennage 21 embedded in the clamping groove 13 is arranged at the end part of the injector jacket 2, and preferably, the empennage 21 and the clamping groove 13 are in interference fit, so that the connection stability is ensured; the injector jacket 2 extends out of the shell 1 after passing through the first through hole 11, and the second through hole 12 is used for the sealing rubber plug 31 to pass through; the injector jacket 2 is embedded in one of the half shells, and then the two half shells are buckled, so that the stable connection of the injector jacket 2 and the shell 1 can be realized; the near end of the injector outer sleeve 2 is provided with a tail fin 21, the far end of the injector outer sleeve is provided with a luer connector 22, and the luer connector 22 is used for connecting a needle tube or a catheter; specifically, the housing 1 is further provided with a third through hole 17 for the rack 33 to pass through, and preferably, in this embodiment, one end of the rack 33, which is far away from the sealing rubber plug 31, is provided with a holding section 34, so as to facilitate the operation.
Referring to fig. 1 to 9, specifically, in this embodiment, two transmission gear shafts 44 are symmetrically arranged on the transmission gear 4, a shaft sleeve matched with the transmission gear shaft 44 is arranged on an inner side wall of a half shell, and after the two half shells are fastened, the two transmission gear shafts 44 are respectively embedded in the two shaft sleeves; the conveying gear 51 is symmetrically provided with two conveying gear shafts 511, the inner side walls of the half shells are provided with conveying arc grooves 15, and after the two half shells are fastened, the two conveying gear shafts 511 are respectively embedded in the two conveying arc grooves 15; also, the inner side wall of the half shell is provided with a suction arc groove 16; two directional gear shafts 73 are symmetrically arranged on the directional gear 7, and the inner side wall of the half shell is provided with a shaft sleeve matched with the directional gear shafts 73.
Claims (11)
1. A medical liquid delivery system comprises a shell, wherein the shell is connected with an injector jacket, and a rack is arranged in the shell; one end of the rack is provided with a sealing rubber plug matched with the outer sleeve of the injector, and the other end of the rack penetrates out of the shell;
the method is characterized in that:
a transmission gear meshed with the rack, a conveying gear driving assembly and a suction gear driving assembly which are respectively matched with the transmission gear are arranged in the shell;
an orientation adjusting assembly used for limiting the rotation direction of the transmission gear is arranged in the shell, so that the transmission gear comprises a first state of rotating only in the conveying direction and a second state of rotating only in the suction direction;
the conveying gear driving assembly comprises a conveying trigger and a conveying gear arranged in a floating mode; the transmission gear is switched to a first state, the conveying gear can be driven to revolve and shift while rotating by pressing the conveying trigger, and the conveying gear and the transmission gear are switched to a meshing state from a separation state; after the conveying trigger is reset, the conveying gear and the transmission gear are switched to a separation state from a meshing state;
the suction gear drive assembly comprises a suction trigger and a floatingly arranged suction gear; switching a transmission gear to a second state, wherein pressing the suction trigger can drive the suction gear to rotate and perform revolution deviation at the same time, so that the suction gear and the transmission gear are switched from a separation state to an engagement state; and after the suction trigger is reset, the suction gear and the transmission gear are switched from the meshing state to the separation state.
2. The medical liquid delivery system according to claim 1, wherein: the conveying gear is connected with a conveying gear shaft, and a conveying arc groove matched with the conveying gear shaft is arranged in the shell; pressing the conveying trigger, rotating the conveying gear around the conveying gear shaft, and moving the conveying gear shaft in the conveying arc groove to make the conveying gear perform revolution deviation;
the suction gear is connected with a suction gear shaft, and a suction arc groove matched with the suction gear shaft is arranged in the shell; when the suction trigger is pressed, the suction gear rotates around the suction gear shaft while the suction gear shaft moves in the suction arc groove, so that the suction gear performs revolution deviation.
3. The medical liquid delivery system according to claim 2, wherein: the conveying trigger is provided with a conveying trigger gear part meshed with the conveying gear, and the suction trigger is provided with a suction trigger gear part meshed with the suction gear.
4. The medical liquid delivery system according to claim 1, wherein: the conveying trigger and the suction trigger are respectively connected with an elastic reset piece.
5. The medical liquid delivery system according to claim 1, wherein: drive gear include with rack toothing's transmission internal tooth, transmission internal tooth both sides be provided with respectively with carry gear complex first transmission external tooth, and with suction gear complex second transmission external tooth.
6. The medical liquid delivery system according to claim 1, wherein: the orientation adjustment assembly includes:
a directional gear engaged with the transmission gear;
a rotatable first pawl;
a first resilient member acting on said first pawl such that said first pawl has a tendency to deflect in a direction approaching the directional gear;
a rotatable second pawl;
a second resilient member acting on said second pawl such that said second pawl has a tendency to deflect in a direction approaching the directional gear; and the number of the first and second groups,
the rotatable adjusting block is positioned between the first pawl and the second pawl;
under the limit of the adjusting block, the first pawl is engaged with the directional gear, the second pawl is separated from the directional gear, and the transmission gear is in a first state; and rotating the adjusting block to separate the first pawl from the directional gear, and engaging the second pawl with the directional gear, so that the transmission gear is in a second state.
7. The medical liquid delivery system according to claim 6, wherein: under the limit of the adjusting block, the first pawl, the second pawl and the directional gear are separated, and the transmission gear is in a third state capable of freely rotating.
8. The medical liquid delivery system according to claim 7, wherein: the adjusting block comprises a first limiting plane and a second limiting plane which are symmetrically arranged, and a limiting arc surface connected between the first limiting plane and the second limiting plane;
when the limiting arc surface is respectively contacted with the first pawl and the second pawl, the first pawl and the second pawl are separated from the directional gear, and the transmission gear is in a third state capable of freely rotating;
rotating the adjusting block to enable the limiting cambered surface to be in contact with the second pawl, and the first limiting plane to be in contact with the first pawl, so that the second pawl is separated from the directional gear, and the first pawl is jointed with the directional gear;
and rotating the adjusting block to enable the limiting cambered surface to be in contact with the first pawl, and the second limiting plane to be in contact with the second pawl, so that the first pawl is separated from the directional gear, and the second pawl is jointed with the directional gear.
9. The medical liquid delivery system according to claim 6, wherein: the regulating block is connected with a regulating shaft, and the regulating shaft is connected with a toggle knob positioned on the outer side of the shell.
10. The medical liquid delivery system according to claim 6, wherein: the first elastic piece is a first spring, and a first fixing plate is arranged on the inner wall of the shell; one end of the first spring is in contact with the first pawl, and the other end of the first spring is connected with the first fixing plate;
the second elastic piece is a second spring, and a second fixing plate is arranged on the inner wall of the shell; one end of the second spring is in contact with the second pawl, and the other end of the second spring is connected with the second fixing plate.
11. The medical liquid delivery system according to claim 6, wherein: the directional gear comprises positioning external teeth and directional internal teeth which are coaxially arranged, the directional external teeth are meshed with the transmission gear, and the directional internal teeth are used for being engaged with the first pawl or the second pawl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211293403.0A CN115501420B (en) | 2022-10-21 | 2022-10-21 | Medical liquid conveying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211293403.0A CN115501420B (en) | 2022-10-21 | 2022-10-21 | Medical liquid conveying system |
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| Publication Number | Publication Date |
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| CN115501420A true CN115501420A (en) | 2022-12-23 |
| CN115501420B CN115501420B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211293403.0A Active CN115501420B (en) | 2022-10-21 | 2022-10-21 | Medical liquid conveying system |
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| CN (1) | CN115501420B (en) |
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Also Published As
| Publication number | Publication date |
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| CN115501420B (en) | 2023-12-22 |
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