CN110404139B - Medical injection device - Google Patents
Medical injection device Download PDFInfo
- Publication number
- CN110404139B CN110404139B CN201910427323.1A CN201910427323A CN110404139B CN 110404139 B CN110404139 B CN 110404139B CN 201910427323 A CN201910427323 A CN 201910427323A CN 110404139 B CN110404139 B CN 110404139B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- trigger
- injection device
- clamping
- medical injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010999 medical injection Methods 0.000 title claims abstract description 50
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 230000000670 limiting effect Effects 0.000 claims description 26
- 230000013011 mating Effects 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 230000036961 partial effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
-
- 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
- A61M5/178—Syringes
- A61M5/31—Details
-
- 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
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2026—Semi-automatic, e.g. user activated piston is assisted by additional source of energy
-
- 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
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2073—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically preventing premature release, e.g. by making use of a safety lock
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The application aims to provide a medical injection device which mainly comprises a shell, a needle cylinder, a piston rod for extruding the inner space of the needle cylinder, a driving sleeve, a triggering cutting sleeve, a triggering piece and the like, wherein the driving sleeve is arranged in the shell and sleeved with the piston rod. The trigger clamping sleeve is sleeved on the driving sleeve, and is in sliding connection with the driving sleeve along the axial direction of the shell, and is used for clamping and connecting the piston rod. The trigger piece is rotationally connected with the driving sleeve and can generate relative sliding, at least part of the trigger piece is arranged in the shell and used for moving along the axial direction of the shell until pushing the trigger clamping sleeve after rotating to an opening position along the circumferential direction of the shell, so that the piston rod is separated from the trigger clamping sleeve and is in clamping connection, and the piston rod is pushed to extrude the needle cylinder through the driving sleeve. Compared with the prior art, the application can simplify the internal structure of the medical injection device and reduce the production cost.
Description
Technical Field
The invention relates to a medical injection pen, in particular to a medical injection device.
Background
The medical injection device, which is a common medical instrument, can replace manual needle insertion, injection and the like to accurately extrude the required dosage.
In the existing medical injection device, as disclosed in the specification of patent application CN201611226505, a card type full medical injection device is needed to be matched with a button mechanism, a card type medicine needle mechanism, a firing mechanism and the like to realize the release and injection of the needle head, and the internal structure is complex, the production cost is high, the popularization and application of the device are affected, and the purchase and use burden of a user are increased.
Therefore, how to simplify the internal structure of the medical injection device and reduce the production cost is a technical problem to be solved urgently.
Disclosure of Invention
In view of the above-mentioned drawbacks or shortcomings of the prior art, the present invention is to provide a medical injection device, which can simplify the internal structure of the medical injection device and reduce the production cost.
In order to solve the above technical problems, the present invention provides a medical injection device, comprising: the device comprises a shell, a needle cylinder, a piston rod for extruding the inner space of the needle cylinder, and a driving sleeve which is arranged in the shell and sleeved with the piston rod;
the trigger cutting sleeve is sleeved on the driving sleeve, is connected with the driving sleeve in a sliding manner along the axial direction of the shell and is used for clamping and connecting the piston rod;
The trigger piece is rotationally connected with the driving sleeve and can generate relative sliding, at least part of the trigger piece is arranged in the shell and used for moving along the axial direction of the shell until pushing the trigger clamping sleeve after rotating to an opening position along the circumferential direction of the shell, so that the piston rod is separated from the trigger clamping sleeve and is in clamping connection, and the piston rod is pushed to extrude the needle cylinder through the driving sleeve.
Further preferably, the driving sleeve includes: the sleeve part is connected with the end part in a rotating way and is connected with the shell in a clamping way; the end part is provided with a through hole for penetrating through the triggering part of the triggering piece and enabling the triggering part to be located in a gap between the sleeve part and the shell.
Further preferably, the end face of the housing has a partial recess, forming an inner edge face for supporting the end portion.
Further preferably, the inner wall of the housing is provided with a protrusion; the outer wall of the sleeve part is provided with a buckle body which is formed by partially protruding, and the buckle body is provided with a buckle groove which is formed by partially recessing and is used for clamping the protrusion.
Further preferably, the driving sleeve further comprises: the elastic clamping part is arranged on the sleeve part and matched with the trigger clamping sleeve; when the elastic clamping part is extruded by the trigger clamping sleeve, the elastic clamping part stretches into the inside from the outside of the opening and is in clamping connection with the piston rod, and after the extrusion of the trigger clamping sleeve is lost, the elastic clamping part is separated from the clamping connection with the piston rod.
Further preferably, the through hole is an arc-shaped groove.
Further preferably, the number of the through holes is two, and the through holes are symmetrically arranged by taking the central axis of the driving sleeve as a symmetry line.
Further preferably, the trigger member includes: the trigger part is connected with the matching part; the trigger part penetrates through the through hole from one end connected with the matching part and extends towards the trigger clamping sleeve.
Further preferably, the mating portion and the triggering portion are detachably connected; wherein the matching part is a hollow cylinder; the trigger section includes: the trigger section is connected with the cover body; wherein, the triggering section has a part to be hollowed out and forms the rib that is used for passing through the through-hole.
Further preferably, the side wall of the end part is provided with the travel groove; the side wall of the matching part is provided with a limiting piece which is used for being matched and inserted into the travel groove; the limiting piece can rotate in the travel groove along the circumferential direction of the driving sleeve, and can move along the axial direction of the driving sleeve when rotating to the opening position.
Further preferably, the travel groove is formed in the inner wall of the end part; the limiting piece is arranged on the outer wall of the matching part.
Further preferably, the travel groove comprises an arc-shaped section which is arranged along the circumferential direction of the end part and a vertical section which is connected with the arc-shaped section and is arranged along the axial direction of the end part; the trigger piece is located at the opening position when the limiting piece rotates from the arc-shaped section to the area connected with the vertical section.
Further preferably, the side wall of the matching part is also provided with a limit groove; the end part is provided with a clamping piece which is used for being inserted into the limit groove; wherein, the limit groove is the same with the shape of stroke groove.
Further preferably, the limit groove includes: an arc-shaped area arranged along the circumferential direction of the matching part and a vertical area connected with the arc-shaped area and arranged along the axial direction of the matching part; the trigger piece is located at the opening position when the clamping piece rotates from the arc-shaped area to the area connected with the vertical area.
Further preferably, the groove depth of the vertical area is smaller than the groove depth of the arc-shaped area, and the vertical area is provided with a clamping groove for being matched with and inserted into the clamping piece after the triggering piece pushes the triggering clamping sleeve.
Further preferably, the travel groove further includes: and the inserting section is reversely arranged with the vertical section and extends to the end face of the end part, and the inserting section is connected with the arc-shaped section.
Further preferably, a spacing bar is arranged in an arc-shaped area of the limiting groove, and the arc-shaped area is divided into a first area and a second area; the second section is connected with the vertical section; the end part is also provided with a protruding piece; when the limiting piece is inserted into the travel groove, the protruding piece is inserted into the first section, and the clamping piece is inserted into the second section.
Further preferably, the insertion section and the vertical section are parallel to each other and are spaced apart.
Further preferably, the piston rod is provided with a hollow cavity, a compression spring is sleeved in the hollow cavity, and two opposite ends of the compression spring respectively support against the top end of the driving sleeve and the bottom of the hollow cavity.
Further preferably, the end portion is a hollow cylinder, and a bottom plate of the end portion is connected with the sleeve portion; the through holes are formed in the bottom plate.
Further preferably, the outer wall of the sleeve portion is slidably connected to the trigger ferrule.
Further preferably, the outer wall of the sleeve part is provided with ribs extending along the axial direction of the sleeve part; the trigger cutting sleeve is provided with a sliding groove for being matched and inserted into the convex rib.
Further preferably, a positioning groove is formed in the inner wall of the trigger clamping sleeve; the outer wall of the sleeve part is provided with protruding points which are used for being matched and inserted into the positioning grooves so as to clamp the positioning grooves; after the convex points are inserted into the positioning grooves, the trigger clamping sleeve is in clamping connection with the piston rod.
Further preferably, the medical injection device further comprises: and the protective sleeve is in buckling connection with the shell and is used for accommodating the needle cylinder.
Further preferably, the medical injection device further comprises: a first identification key disposed on the trigger; a second identification key and a third identification key arranged on the shell; when the first identification key rotates to a position opposite to the third identification key, the trigger piece is located at the opening position.
Compared with the prior art, the application simplifies the internal structure of the medical injection device and reduces the production cost.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
Fig. 1: the external structure of the injection device for traditional Chinese medicine according to the first embodiment of the invention is schematically shown;
fig. 2: a top view of a medical injection device according to a first embodiment of the present invention;
fig. 3: an exploded view of a medical injection device according to a first embodiment of the present invention;
fig. 4: schematic view of section B-B in fig. 2;
fig. 5: a schematic front view of the driving sleeve in the first embodiment of the present invention;
Fig. 6: a schematic side structure of the driving sleeve in the first embodiment of the present invention;
fig. 7: the structure of the matching part in the first embodiment of the invention is schematically shown;
Fig. 8: the first embodiment of the invention is a schematic structural diagram of the trigger cutting ferrule in the first embodiment of the invention;
A structural schematic diagram of the trigger cutting sleeve;
Fig. 9: the structure of the triggering cutting sleeve in the first embodiment of the invention is schematically shown;
Fig. 10: the trigger piece in the first embodiment of the invention is a schematic structural diagram;
Fig. 11: schematic illustration of section A-A in fig. 1;
Fig. 12: a top view of the drive sleeve in a first embodiment of the invention;
Reference numerals illustrate: the device comprises a shell 1, a driving sleeve 2, a trigger piece 3, a matching part 31, a trigger part 32, a needle cylinder 5, a trigger clamping sleeve 6, a piston rod 7, a compression spring 8, a protective sleeve 9, a convex ring 51, an end part 21, a sleeve part 22, a clamping piece 211, a convex piece 212, a retaining buckle 213, a bottom plate 214, a buckle body 221, a buckle groove 222, a travel groove 23, an arc-shaped section 231, a vertical section 232, an insertion section 233, an elastic buckle part 24, a convex point 25, a convex rib 26, a limit groove 311, an arc-shaped section 3111, a vertical section 3112, a clamping groove 3113, a spacing bar 312, a stop 313, a limit piece 314, a mark groove 323, a slide groove 61, a avoidance area 62, a clamping plate 324, a cover 321 and a rib 322; a through hole 215; identification key 106; an identification key 107; the key 108 is identified.
Detailed Description
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
As shown in fig. 1 to 12, a first embodiment of the present invention provides a medical injection device, which is mainly composed of a housing 1, a cylinder 5, a piston rod 7 for pressing an inner space of the cylinder 5, a driving sleeve 2 provided in the housing 1 and sleeved with the piston rod 7, a trigger sleeve 6, a trigger 3, and the like.
The triggering cutting ferrule 6 is sleeved on the driving sleeve 2 and is in sliding connection with the driving sleeve 2 along the axial direction of the shell 1, so as to be used for clamping and connecting the piston rod 7.
The trigger piece 3 is rotationally connected with the driving sleeve 2 and can generate relative sliding, at least part of the trigger piece is arranged in the shell 1 and used for moving along the axial direction of the shell 1 until the trigger cutting sleeve 6 is pushed after the trigger piece rotates to an open position along the circumferential direction of the shell 1, so that the piston rod 7 is separated from the trigger cutting sleeve 6 and is in clamping connection, and the piston rod 7 is pushed by the driving sleeve 2 to extrude the needle cylinder 5.
According to the application, the trigger sleeve 6 is in sliding connection with the driving sleeve 2 and is in clamping connection with the piston rod 7 in the driving sleeve 2, and the trigger piece 3 is rotatably arranged in the shell 1, so that when the trigger sleeve is used, the trigger piece 3 can move downwards along the axial direction of the shell 1 after rotating to an opening position along the circumferential direction of the shell 1 by means of the limit of the driving sleeve 2, as in the figure 2, the identification key 106 on the trigger piece 3 starts to rotate from a position opposite to the identification key 107 on the shell 1 until the identification key 106 on the trigger piece 3 rotates to a position opposite to the identification key 108 arranged on the shell 1, and further, the trigger piece 3 is pushed to move along the axial direction of the shell 1 until the trigger sleeve 6 is separated from the piston rod 7, and then a user can push the piston rod 7 to extrude the syringe 5 by pressing the like, so that the injection of medicament in the syringe 5 is realized, the operation is simple, the internal structure of the medical injection device is simplified, and the production cost is reduced.
Specifically, as shown in fig. 3, the driving sleeve 2 in the present embodiment is mainly composed of an end 21 rotatably connected to the trigger 3, a sleeve portion 22 connected to the end 21 and engaged with the housing 1, and the like. The end portion 21 is provided with a through hole 215 for passing through the trigger portion 32 of the trigger 3, and for positioning the trigger portion 32 in the gap between the sleeve portion 22 and the housing 1. The trigger piece 3 is axially limited by the end portion 21, and meanwhile, the through hole 215 is formed, so that the trigger piece 3 rotates in a gap between the sleeve portion 22 and the shell 1, and when the trigger piece 3 does not reach the open position, the trigger piece 3 is prevented from moving downwards along the axial direction of the shell 1 until the trigger clamping sleeve 6 is pushed to generate misoperation. In addition, when necessary, the shape of the housing 1 in the present embodiment is preferably a cylindrical body.
Further preferably, as shown in fig. 4, the end surface of the housing 1 is partially concave to form an inner edge surface for supporting the end 21. The bearing of the inner edge facing the end 21 is not only beneficial to assembly and prevents the drive sleeve 2 from being assembled in a staggered way before being in clamping connection with the shell 1, but also can prevent the drive sleeve 2 from moving along the axial direction of the shell 1, so that the phenomenon that the piston rod 7 extrudes the inside of the needle cylinder 5 occurs.
Further preferably, as shown in fig. 4, the inside of the piston rod 7 is a hollow cavity, and a compression spring 8 is sleeved in the hollow cavity, and two opposite ends of the compression spring 8 respectively abut against the top end of the driving sleeve 2 and the bottom of the hollow cavity. So that the piston rod 7 and the driving sleeve 2 are kept well against each other under the elastic action of the compression spring 8, and after the piston rod 7 is unlocked, the piston rod 7 is pushed to inject in the needle cylinder 5 through the rebound action of the compression spring 8, and then automatic injection is realized, and the requirement of disposable full-automatic injection is met.
In order to meet the design and assembly requirements in practical applications, as shown in fig. 5, preferably, the inner wall of the housing 1 is provided with a protrusion (not labeled in the figure); the outer wall of the sleeve portion 22 has a fastening body 221 formed by partially protruding, and the fastening body 221 has a fastening groove 222 formed by partially recessing for engaging with the protrusion. By the clamping connection structure, manufacturing process difficulty is reduced, and other adverse factors such as influence on strength of the sleeve part 22 and influence on assembly of the piston rod 7 due to direct slotting on the outer wall of the sleeve part are avoided. Obviously, in this embodiment, the snap connection may be implemented by directly slotting on the outer wall of the sleeve portion 22 or slotting on the inner wall of the housing 1, which is not specifically limited and described in detail in this embodiment.
Further preferably, as shown in fig. 5, the driving sleeve 2 further comprises: an opening formed in the sleeve portion 22, and an elastic buckle portion 24 provided on the sleeve portion 22 and engaged with the trigger ferrule 6; wherein, the elastic buckle part 24 stretches into the interior from the outside of the opening when being extruded by the triggering cutting ferrule 6, and keeps clamping connection with the piston rod 7, and breaks away from clamping connection with the piston rod 7 after the extrusion of the triggering cutting ferrule 6 is lost. Thereby be connected with the chucking of piston rod 7 through elasticity buckle portion 24, realize the locking to piston rod 7 to make driving sleeve 2 unable promotion piston rod 7 to the inside extrusion of cylinder 5 under the exogenic action, in order to avoid the user to trigger driving sleeve 2's phenomenon because of the misoperation, and when the user needs the injection, can be when trigger cutting ferrule 6 is located the open position, through the promotion of modes such as upwards pushing trigger cutting ferrule 6, can realize the unblock operation to piston rod 7.
In detail, the elastic buckling parts 24 and the openings (not labeled in the drawings) in the embodiment are two, and are symmetrically arranged by taking the central axis of the driving sleeve 2 as a symmetry line, so that the phenomenon that the piston rod 7 tilts in the process of being tightly clamped and connected with the elastic buckling parts 24 is avoided, and the piston rod 7 is ensured to stably move along the axial direction of the needle cylinder 5 under the action of the compression spring 8.
Further preferably, as shown in fig. 12, the through hole 215 is an arc-shaped slot, so that the trigger 3 can rotate along the circumferential direction of the housing 1.
Further preferably, the number of the through holes 215 is two, and the through holes are symmetrically arranged with the central axis of the driving sleeve 2 as a symmetry line. So that the trigger piece 3 can push the trigger clamping sleeve 6 from the two opposite ends of the trigger clamping sleeve 6, the trigger clamping sleeve 6 is ensured to stably move along the axial direction of the driving sleeve 2, and the phenomenon that the trigger piece 3 is difficult to push the trigger clamping sleeve 6 or the trigger clamping sleeve 6 is inclined and blocked is avoided. Obviously, the number of the through holes 215 in this embodiment may be one, two, four, and other numbers according to practical situations, which are not described herein.
As shown in fig. 4, 7 and 8, the trigger 3 in the present embodiment is mainly composed of an engaging portion 31 rotatably connected to the end portion 21, a trigger portion 32 connected to the engaging portion 31, and the like. Wherein the trigger part 32 extends from the end connected to the mating part 31 through the through hole 215 and towards the trigger ferrule 6.
Further preferably, as shown in fig. 7, the manufacturing process is reduced and materials are saved for ease of assembly. The mating part 31 and the triggering part 32 are detachably connected; wherein the matching part 31 is a hollow cylinder; the trigger unit 32 includes: the trigger section is connected with the cover 321; wherein, the triggering section has a part hollowed out to form ribs 322 for passing through the through hole 215. The triggering section in this embodiment may adopt a cylindrical structure with a part thereof being hollowed out. Wherein, the cover 321 is provided with a clamping plate 324; the engaging portion 31 is provided with a stopper 313 to hold the cover 321 by the stopper 313 and to realize the engagement connection between the cover 321 and the engaging portion 31 by the clip 324. In addition, the cover 321 is provided with a marking groove 323, which is convenient for assembly and positioning.
As shown in fig. 5, 11 and 12, the side wall of the end portion 21 is provided with a stroke groove 23; the side wall of the fitting portion 31 is provided with a stopper 314 for fitting into the insertion stroke groove 23. The limiting member 314 is rotatable in the travel groove 23 in the circumferential direction of the drive sleeve 2, and is movable in the axial direction of the drive sleeve 2 when rotated to the open position. Through the cooperation of the limiting piece 314 and the travel groove 23, the rotation connection between the driving sleeve 2 and the trigger piece 3 is realized, and meanwhile, the movement track of the trigger piece 3 can be realized by means of the shape design of the travel groove 23, so that the trigger piece 3 can move along the axial direction of the shell 1 after rotating to an opening position along the circumferential direction of the shell 1.
In order to reduce the difficulty of manufacture, facilitate assembly and save materials, preferably, the travel groove 23 is formed on the inner wall of the end portion 21; the stopper 314 is disposed on the outer wall of the mating portion 31. It is obvious to those skilled in the art that the travel groove 23 in the present embodiment may also be formed on the outer wall of the end portion 21; the limiting member 314 is disposed on the inner wall of the engaging portion 31 to achieve the above purpose, but in this embodiment, the travel slot 23 is only formed on the inner wall of the end portion 21; the stopper 314 is provided on the outer wall of the engaging portion 31 as an example.
In detail, as shown in fig. 5, the stroke groove 23 may be constituted by an arc-shaped section 231 opened in the circumferential direction of the end portion 21, a vertical section 232 connected to the arc-shaped section 231 and opened in the axial direction of the end portion 21, and the like. Wherein the trigger member 3 is in the open position when the stop 314 is rotated from the arcuate segment 231 to the region where the vertical segment 232 is connected. It can be seen that the engaging portion 31 and the triggering portion 32 can only move along the circumferential direction of the housing 1 by the movement of the limiting member 314 in the arc-shaped section 231, and the engaging portion 31 and the triggering portion 32 can also move along the axial direction of the housing 1 by the movement of the limiting member 314 in the vertical section 232. Moreover, since the arc-shaped section 231 is connected with the vertical section 232, when the limiting member 314 rotates in the arc-shaped section 231 to be in the vertical section 232, namely, the matching portion 31 is located at the open position, and when a user slightly applies pressure to the trigger member 3, the limiting member 314 can move downwards in the vertical section 232, so that the matching portion 31 and the trigger portion 32 move along the axial direction of the shell 1.
As shown in fig. 7 and 11, further preferably, the side wall of the mating portion 31 may also be provided with a limit groove 311; the end part 21 is provided with an engaging piece 211 for being inserted into the limit groove 311; the limiting groove 311 has the same shape as the travel groove 23. Through the mutually supporting of block piece 211 and spacing groove 311 to cooperation above-mentioned travel groove 23 and spacing piece 314, synchronous realization cooperation portion 31 and tip 21 promptly trigger the rotation connection between piece 3 and the drive sleeve 2, be favorable to reinforcing the stability of rotation connection between trigger piece 3 and the drive sleeve 2, be difficult for the separation after mutual block.
Further preferably, in the same way, the limiting groove 311 includes: an arc-shaped region 3111 opened along the circumferential direction of the fitting portion 31, a vertical region 3112 connected to the arc-shaped region 3111 and opened along the axial direction of the fitting portion 31; wherein the trigger member 3 is in the open position when the engagement member 211 is rotated from within the arcuate region 3111 to the region where the vertical region 3112 is connected. Through above-mentioned arc district 3111 and vertical district 3112, realize the rotation between trigger piece 3 and the drive sleeve 2 and be connected, ensure that the motion track of trigger piece 3 can follow the route removal of design, further be favorable to reinforcing the stability of rotation connection between trigger piece 3 and the drive sleeve 2, be difficult for the separation after the mutual block.
Further preferably, as shown in fig. 7, the groove depth of the vertical region 3112 is smaller than the groove depth of the arc region 3111, and the vertical region 3112 is provided with a clamping slot 3113 for mating insertion of the clamping member 211 after the triggering member 3 pushes the triggering collar 6. Through the block of block piece 211 and draw-in groove 3113, realize the locking of trigger piece 3 and drive sleeve 2, unable continuous use to prevent that medical injection device from unable reuse and disassembling, and cause the condition of secondary accidental injury, thereby realize medical injection device's disposable, guarantee patient's safety.
Further preferably, as shown in fig. 5, in order to facilitate the assembly between the trigger 3 and the driving sleeve 2, the travel slot 23 further comprises: an insertion section 233 opened opposite to the vertical section 232 and extending to the end face of the end portion 21, and the insertion section 233 is connected to the arc-shaped section 231. By the structure, it is convenient
In detail, the insertion section 233 and the vertical section 232 are mutually parallel and spaced apart so that the travel slot 23 is in a "Z" layout, facilitating the assembly between the trigger 3 and the driving sleeve 2.
Further preferably, as shown in fig. 7, a spacing bar 312 is disposed in the arc-shaped region 3111 of the limiting slot 311, and divides the arc-shaped region 3111 into a first section and a second section; the second section is connected to the vertical section 3112; the end 21 is also provided with a protrusion 212; when the limiting member 314 is inserted into the travel groove 23, the protruding member 212 is inserted into the first section, and the engaging member 211 is inserted into the second section. When a user applies an external force to the mating portion 31, the protrusion 212 may press the spacer 312, and after rotating from the first section to the second section, the spacer 312 is blocked, so that no reverse rotation can occur, thereby preferably preventing the mating portion 31 from rotating or reversing after being rotatably connected with the end 21, so as to ensure that the medical injection device cannot be automatically pressed before use, and can only rotate in a single direction according to the indication direction when in use. In addition, pressing the spacer 312 by the protrusion 212 may also generate a clicking sound to facilitate the user's judgment of the direction of rotation of the trigger 3.
Further preferably, the strength of the structure is ensured for material saving. The end part 21 is a hollow cylinder, and a bottom plate 214 of the end part 21 is connected with the sleeve part 22; the bottom plate 214 is provided with the through hole 215. In addition, the bottom plate 214 can also play a role in protecting and limiting the trigger piece 3 under the condition that the rotation and the axial movement of the trigger piece 3 are not affected, so that the phenomenon that the whole medical injection device is damaged due to the fact that the needle cylinder 5 is extruded due to the fact that the axial movement distance of the trigger piece 3 is too large is prevented.
Further preferably, the outer wall of the sleeve portion 22 is slidingly connected with the trigger sleeve 6 for facilitating assembly of the trigger sleeve 6.
Specifically, as shown in fig. 6, the outer wall of the sleeve portion 22 is provided with ribs 26 extending in the axial direction thereof; the trigger ferrule 6 is provided with a slide slot 61 for mating insertion of the bead 26. The sleeve portion 22 and the trigger sleeve 6 are connected in a clamping manner by the cooperation of the ribs 26 and the sliding grooves 61. And, the width of the rib 26 gradually decreases when extending to the trigger sleeve 6 along the axial direction of the sleeve portion 22, so as to realize the limit of the trigger sleeve 6 while realizing the snap connection.
Further preferably, as shown in fig. 9, a positioning groove (not labeled in the drawing) is formed on the inner wall of the trigger sleeve 6; as shown in fig. 5, the outer wall of the sleeve portion 22 is provided with a protruding point 25 for being inserted into the positioning groove in a matching manner so as to clamp the positioning groove; after the convex point 25 is inserted into the positioning groove, the trigger clamping sleeve 6 is in clamping connection with the piston rod 7. Through the block connection of bump 25 and constant head tank, realized triggering the accurate assembly of cutting ferrule 6, improve the efficiency of assembly. It is obvious to those skilled in the art that the travel groove 23 in the present embodiment may be formed on the outer wall of the end portion 21; the limiting member 314 is disposed on the inner wall of the mating portion 31 for achieving the above purpose.
In addition, the trigger sleeve 6 has a portion hollowed out to form a avoidance zone 62 to avoid the trigger member 3 before the trigger member 3 reaches the open position.
Further preferably, as shown in fig. 1, the medical injection device further includes: a protective sleeve 9 which is in snap connection with the housing 1 and is used for accommodating the needle cylinder 5. So as to avoid exposing the syringe 5 to the outside and avoiding the phenomenon that a user touches the needle in the syringe 5 by mistake in the subsequent use process.
Further, the outer wall of the syringe 5 of the present embodiment is provided with a convex ring 51 for being snapped into an annular groove (not shown) provided in the inner wall of the housing 1.
In addition, the outer wall of the protective sleeve 9 is provided with threads 11 at a part to increase friction, so that a user can hold the medical injection device conveniently and the medical injection device is not easy to fall off.
In addition, it should be noted that, in the above-mentioned further preferred embodiments of the present embodiment, in order to add or improve the technical solutions according to the actual situation to solve the corresponding technical problems, the parts and structures involved in the present embodiment are not necessary for how to simplify the structure of the medical injection device and realize the technical problems of accurate release control of the piston rod, and may be set according to the actual situation, but the present embodiment does not specifically limit and describe the same.
The above embodiments are only for illustrating the technical scheme of the present invention, not for limiting the same, and the present invention is described in detail with reference to the preferred embodiments only. It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and it is intended to cover the scope of the claims of the present invention.
Claims (22)
1. A medical injection device comprising: the utility model provides a syringe, is used for extrudeing the piston rod of cylinder inner space, set up in the casing and the cover is equipped with the drive sleeve of piston rod, its characterized in that includes:
the trigger cutting sleeve is sleeved on the driving sleeve, is connected with the driving sleeve in a sliding manner along the axial direction of the shell and is used for clamping and connecting the piston rod;
The trigger piece is rotationally connected with the driving sleeve, can generate relative sliding, is at least partially arranged in the shell, and can move along the axial direction of the shell until the trigger clamping sleeve is pushed after rotating to an open position along the circumferential direction of the shell, so that the piston rod is separated from the trigger clamping sleeve and is clamped and connected, and then the piston rod is pushed to extrude the needle cylinder through the driving sleeve;
The drive sleeve includes: the sleeve part is connected with the end part in a rotating way and is connected with the shell in a clamping way;
the end part is provided with a through hole for passing through a triggering part of the triggering piece and enabling the triggering part to be positioned in a gap between the sleeve part and the shell;
The trigger includes: the trigger part is connected with the matching part; the trigger part penetrates through the through hole from one end connected with the matching part and extends towards the trigger clamping sleeve; the matching part is a hollow cylinder;
The side wall of the end part is provided with a travel groove; the side wall of the matching part is provided with a limiting piece which is used for being matched and inserted into the travel groove; the limiting piece can rotate in the travel groove along the circumferential direction of the driving sleeve, and can move along the axial direction of the driving sleeve when rotating to the opening position.
2. The medical injection device of claim 1, wherein the end face of the housing has a partial recess forming an inner rim surface for supporting the end portion.
3. The medical injection device according to claim 1, wherein an inner wall of the housing is provided with a protrusion; the outer wall of the sleeve part is provided with a buckle body which is formed by partially protruding, and the buckle body is provided with a buckle groove which is formed by partially recessing and is used for clamping the protrusion.
4. The medical injection device of claim 1, wherein the drive sleeve further comprises: the elastic clamping part is arranged on the sleeve part and matched with the trigger clamping sleeve; when the elastic clamping part is extruded by the trigger clamping sleeve, the elastic clamping part stretches into the inside from the outside of the opening and is in clamping connection with the piston rod, and after the extrusion of the trigger clamping sleeve is lost, the elastic clamping part is separated from the clamping connection with the piston rod.
5. The medical injection device of claim 1, wherein the through-hole is an arcuate slot.
6. The medical injection device according to claim 1, wherein the number of the through holes is two, and the through holes are symmetrically arranged with the central axis of the driving sleeve as a symmetry line.
7. The medical injection device according to any one of claims 1 to 6, wherein the mating portion and the trigger portion are detachably connected; the trigger section includes: the trigger section is connected with the cover body; wherein, the triggering section has a part to be hollowed out and forms the rib that is used for passing through the through-hole.
8. The medical injection device of claim 7, wherein the travel slot is open to an inner wall of the end portion; the limiting piece is arranged on the outer wall of the matching part.
9. The medical injection device according to claim 7, wherein the travel groove comprises an arc-shaped section opened along the circumferential direction of the end portion, a vertical section connected with the arc-shaped section and opened along the axial direction of the end portion; the trigger piece is located at the opening position when the limiting piece rotates from the arc-shaped section to the area connected with the vertical section.
10. The medical injection device according to claim 7, wherein the side wall of the mating portion is further provided with a limit groove; the end part is provided with a clamping piece which is used for being inserted into the limit groove; wherein, the limit groove is the same with the shape of stroke groove.
11. The medical injection device of claim 10, wherein the limit slot comprises: an arc-shaped area arranged along the circumferential direction of the matching part and a vertical area connected with the arc-shaped area and arranged along the axial direction of the matching part; the trigger piece is located at the opening position when the clamping piece rotates from the arc-shaped area to the area connected with the vertical area.
12. The medical injection device of claim 11, wherein the vertical region has a groove depth less than the groove depth of the arcuate region, and the vertical region is provided with a slot for mating insertion of the snap member after the trigger member pushes the trigger collar.
13. The medical injection device of claim 9, wherein the travel slot further comprises: and the inserting section is reversely arranged with the vertical section and extends to the end face of the end part, and the inserting section is connected with the arc-shaped section.
14. The medical injection device according to claim 11, wherein a spacer is provided in an arc-shaped region of the limit groove, and divides the arc-shaped region into a first section and a second section; the second section is connected with the vertical section; the end part is also provided with a protruding piece; when the limiting piece is inserted into the travel groove, the protruding piece is inserted into the first section, and the clamping piece is inserted into the second section.
15. The medical injection device of claim 13, wherein the insert section and the vertical section are parallel to each other and are spaced apart.
16. The medical injection device according to claim 1, wherein the interior of the piston rod is a hollow cavity, a compression spring is sleeved in the hollow cavity, and two opposite ends of the compression spring respectively support against the top end of the driving sleeve and the bottom of the hollow cavity.
17. The medical injection device of claim 1, wherein the end portion is a hollow cylinder and a bottom plate of the end portion is connected to the sleeve portion; the through holes are formed in the bottom plate.
18. The medical injection device of claim 1, wherein an outer wall of the sleeve portion is slidably connected to the trigger ferrule.
19. The medical injection device according to claim 18, wherein the outer wall of the sleeve portion is provided with ribs extending in the axial direction thereof; the trigger cutting sleeve is provided with a sliding groove for being matched and inserted into the convex rib.
20. The medical injection device according to claim 1, wherein the inner wall of the trigger sleeve is provided with a positioning groove; the outer wall of the sleeve part is provided with protruding points which are used for being matched and inserted into the positioning grooves so as to clamp the positioning grooves; after the convex points are inserted into the positioning grooves, the trigger clamping sleeve is in clamping connection with the piston rod.
21. The medical injection device of claim 1, further comprising: and the protective sleeve is in buckling connection with the shell and is used for accommodating the needle cylinder.
22. The medical injection device of claim 1, further comprising: a first identification key disposed on the trigger; a second identification key and a third identification key arranged on the shell; when the first identification key rotates to a position opposite to the third identification key, the trigger piece is located at the opening position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910427323.1A CN110404139B (en) | 2019-05-22 | 2019-05-22 | Medical injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910427323.1A CN110404139B (en) | 2019-05-22 | 2019-05-22 | Medical injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110404139A CN110404139A (en) | 2019-11-05 |
| CN110404139B true CN110404139B (en) | 2024-07-16 |
Family
ID=68357773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910427323.1A Active CN110404139B (en) | 2019-05-22 | 2019-05-22 | Medical injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110404139B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025954A (en) * | 2013-02-27 | 2015-11-04 | 欧文蒙福德有限公司 | Automatic injection device |
| CN208130222U (en) * | 2017-05-27 | 2018-11-23 | 上海久森医疗科技有限公司 | The drive mechanism of automated injection device |
| CN212214313U (en) * | 2019-05-22 | 2020-12-25 | 上海保育环境技术有限公司 | Medical injection device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19730999C1 (en) * | 1997-07-18 | 1998-12-10 | Disetronic Licensing Ag | Injection pen dosing selected volume of fluid, especially insulin |
| US9089652B2 (en) * | 2008-12-12 | 2015-07-28 | Sanofi-Aventis Deutschland Gmbh | Drive mechanism for a medication delivery device and medication delivery device |
| US9802005B2 (en) * | 2012-10-03 | 2017-10-31 | Carebay Europe Ltd | Medicament delivery device |
| GB2507541A (en) * | 2012-11-02 | 2014-05-07 | Owen Mumford Ltd | Injector with clutch braking or interruption mechanism |
| CH711240A2 (en) * | 2015-06-23 | 2016-12-30 | Tecpharma Licensing Ag | Auto injection device. |
| JP3213066U (en) * | 2016-07-21 | 2017-10-19 | 建森 翁 | Medical injection device |
| CN206063507U (en) * | 2016-07-21 | 2017-04-05 | 翁建森 | A kind of automated injection device with regulating dosage |
| CN207562176U (en) * | 2017-05-17 | 2018-07-03 | 上海久森医疗科技有限公司 | Press-key structure and automated injection device |
| GB201615447D0 (en) * | 2016-09-12 | 2016-10-26 | Norton Healthcare Ltd | Dose delivery mechanism |
| CN106492313B (en) * | 2016-12-27 | 2023-01-10 | 甘肃成纪生物药业有限公司 | Card type full-automatic injection pen |
| CN107812279A (en) * | 2017-11-24 | 2018-03-20 | 上海久森医疗科技有限公司 | Transmission mechanism and medical injection device |
| CN109172946B (en) * | 2018-08-31 | 2023-10-03 | 嘉兴森迈医疗科技有限公司 | automatic injection pen |
-
2019
- 2019-05-22 CN CN201910427323.1A patent/CN110404139B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025954A (en) * | 2013-02-27 | 2015-11-04 | 欧文蒙福德有限公司 | Automatic injection device |
| CN208130222U (en) * | 2017-05-27 | 2018-11-23 | 上海久森医疗科技有限公司 | The drive mechanism of automated injection device |
| CN212214313U (en) * | 2019-05-22 | 2020-12-25 | 上海保育环境技术有限公司 | Medical injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110404139A (en) | 2019-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1216719B1 (en) | Safety syringe | |
| US6929622B2 (en) | Safety syringe cylinder | |
| US4744790A (en) | Fast action cartridge syringe holder | |
| EP1904130B1 (en) | Needled pharmaceutical delivery device with triggered automatic needle insertion and manually controlled pharmaceutical injection | |
| CN101252962B (en) | Needle shroud assembly | |
| US2688325A (en) | Piston plug withdrawal limiting means for hypodermic syringe devices and the like | |
| US8562561B2 (en) | Safety syringe with retractable rotation | |
| US4078565A (en) | Readily activated hypodermic syringe | |
| US7621888B2 (en) | Safety hypodermic syringe | |
| CN109172946B (en) | automatic injection pen | |
| US2646798A (en) | Cartridge syringe | |
| EP2821090B1 (en) | Retractable self-destructing safety syringe with replaceable needle | |
| CA1071052A (en) | Injection syringe | |
| JPH06209996A (en) | Injector with isolation structure | |
| CN110404139B (en) | Medical injection device | |
| US7452366B2 (en) | Safety lancet device | |
| GB2530076A (en) | Injector pens | |
| CN212214313U (en) | Medical injection device | |
| EP3638348B1 (en) | Safety syringe | |
| US6893179B2 (en) | Rotary bar-projecting mechanism for push-button implement | |
| US7018124B1 (en) | Writing implement with stylus | |
| CN110812606A (en) | Hand-operated locking type syringe | |
| CN209154759U (en) | Automatically inject the locking mechanism and automatic injection pen of pen | |
| CN107714103B (en) | Injection syringe | |
| CN113230492B (en) | Dosage-adjustable liquid medicine feeding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200911 Address after: Room 116, 459 Zhennan Road, Putuo District, Shanghai, 201306 Applicant after: Shanghai Conservation Technology Co.,Ltd. Address before: 201203 Shanghai City, Pudong New Area China (Shanghai) free trade zone fanchun Road No. 400 Building 1 layer 3 Applicant before: SHANGHAI JIUSEN MEDICAL TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210527 Address after: 314100 5 / F, building 6, 5 / F, building 8, No. 313, Lingxiu Road, Luoxing street, Jiashan County, Jiaxing City, Zhejiang Province Applicant after: Jiaxing Senmai Medical Technology Co.,Ltd. Address before: Room 116, 459 Zhennan Road, Putuo District, Shanghai, 201306 Applicant before: Shanghai Conservation Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |