CN115154766B - Self-energizing device for needleless injector - Google Patents
Self-energizing device for needleless injector Download PDFInfo
- Publication number
- CN115154766B CN115154766B CN202210702794.0A CN202210702794A CN115154766B CN 115154766 B CN115154766 B CN 115154766B CN 202210702794 A CN202210702794 A CN 202210702794A CN 115154766 B CN115154766 B CN 115154766B
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- Prior art keywords
- needleless injector
- assembly
- self
- mounting table
- sliding
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- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 238000004146 energy storage Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000005284 excitation Effects 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
-
- 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
-
- 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
- A61M5/31—Details
- A61M5/3129—Syringe barrels
-
- 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
- A61M5/3129—Syringe barrels
- A61M5/3135—Syringe barrels characterised by constructional features of the proximal end
-
- 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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- 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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
-
- 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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
-
- 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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
- A61M5/3158—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by axially moving actuator operated by user, e.g. an injection button
-
- 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
- A61M2005/2006—Having specific accessories
-
- 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
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M2005/3131—Syringe barrels specially adapted for improving sealing or sliding
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 invention discloses a self-excitation device for a needleless injector, which comprises a fixed component, a sliding component, an elastic energy storage component and at least one locking mechanism, wherein the sliding component is slidingly matched with the fixed component, the elastic energy storage component is arranged between the fixed component and the sliding component, and the sliding component is used for compressing the elastic energy storage component in the backward movement process so as to store energy of the elastic energy storage component; the locking mechanism is used for locking the position of the sliding component relative to the fixed component after the sliding component moves backwards relative to the fixed component to the energy storage completion position; the automatic unlocking mechanism comprises a mounting table and a self-unlocking mechanism corresponding to the locking mechanism, wherein the needleless injector is in sliding fit on the mounting table; the self-unlocking mechanism is configured to act upon the locking mechanism to unlock the locking mechanism to cause the elastic energy storage assembly to release energy during at least a portion of the locking mechanism locking the position of the sliding assembly relative to the fixed assembly and the needleless injector moving rearward along the mounting platform. The invention can conveniently excite the needleless injector to inject.
Description
Technical Field
The invention relates to a needleless injector, in particular to a self-excitation device for the needleless injector.
Background
There is very big convenience on the passive continuous needleless injector of gas spring mixed type, does not receive the influence of use place, does not also rely on external power source, but needs two operating personnel when injecting, and an operating personnel holds the receiver, and another operating personnel removes the locking mechanical system of unblock needleless injector with the hand, leads to work degree of difficulty and use cost height.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a self-excitation device for a needleless injector, which can conveniently excite the needleless injector to inject.
In order to solve the technical problems, the technical scheme of the invention is as follows: a self-energizing device for a needleless injector comprising a fixed assembly, a sliding assembly slidingly engaged with the fixed assembly, an elastic energy storage assembly disposed between the fixed assembly and the sliding assembly, and at least one locking mechanism, the sliding assembly being configured to compress the elastic energy storage assembly during rearward movement to store energy in the elastic energy storage assembly; the locking mechanism is used for locking the position of the sliding assembly relative to the fixed assembly after the sliding assembly moves backwards relative to the fixed assembly to the energy storage completion position;
the automatic unlocking device comprises a mounting table and a self-unlocking mechanism corresponding to the locking mechanism, wherein the needleless injector is in sliding fit on the mounting table; the self-unlocking mechanism is configured to act on the locking mechanism to unlock the locking mechanism to cause the elastic energy storage assembly to release energy during at least a portion of the locking mechanism locking the position of the sliding assembly relative to the fixed assembly and the needleless syringe moving rearward along the mounting platform.
Further provided is a specific structure of a locking mechanism comprising a latch assembly and a mating portion mounted on the fixed assembly; wherein,,
the locking assembly comprises a locking body hinged on the sliding assembly through a locking shaft and a locking elastic piece arranged between the sliding assembly and the locking body;
the lock catch body is used for being hung and buckled on the matching part through the rear end part of the lock catch body so as to lock the position of the sliding component relative to the fixed component.
Further, after the rear end portion of the latch body is caught on the fitting portion, the distance between the surface of the latch body on the side of the slide member and the slide member gradually decreases from front to rear.
The self-unlocking mechanism comprises an excitation shaft with the lower end part mounted on the mounting table and an excitation wheel rotatably mounted at the upper end part of the excitation shaft; wherein,,
the trigger wheel is used for rolling the lock catch body during at least part of the backward movement of the needleless injector along the mounting table so as to enable the rear end part of the lock catch body to rotate back to the sliding assembly to be separated from the matching part.
Further for facilitating needleless injector reset, the self-energizing device for needleless injector further comprises an elastic return member disposed between the mounting table and the needleless injector, the elastic return member being adapted to drive the needleless injector to return by its rebound after the needleless injector moves backward along the mounting table into place.
Further to prevent rearward movement of the entire needleless injector during rearward pulling of the slide assembly, the self-priming device for a needleless injector further includes a stop mechanism disposed between the mounting table and the needleless injector for limiting the needleless injector to the mounting table.
The specific structure of the limiting mechanism is further provided, and the limiting mechanism comprises a positioning hole arranged on the mounting table and a positioning assembly movably arranged on the needleless injector; wherein,,
the positioning assembly extends through at least a portion thereof into the positioning aperture to define the needleless injector on the mounting table.
Further, the positioning assembly comprises a positioning body arranged on the needleless injector, a bolt extending into the positioning body and a limiting pin inserted into the upper end part of the bolt; wherein,,
the positioning body is provided with a transverse groove and a vertical groove which are communicated with each other, the transverse groove and the vertical groove form a T shape together, and the transverse groove is positioned on the upper end face of the positioning body;
when the limiting pin is positioned in the transverse groove, the lower end part of the bolt is separated from the positioning hole; when the limiting pin enters the vertical groove, the lower end part of the bolt can extend into the positioning hole.
Further in order to make things convenient for the bolt to stretch into the locating hole, positioning assembly still includes location elastic component, the bolt is equipped with the portion of resisting, location elastic component suit is in the bolt, it is tight to prop in the portion of resisting with between the location body, be used for when the spacer pin aligns vertical groove is through its resilience promotion the spacer pin moves down.
Further for convenience of sliding the needleless injector on the mounting table, the self-priming device for a needleless injector further comprises a connection plate on which the needleless injector is mounted, the connection plate being sliding fitted on the mounting table.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. when injection operation is needed, the needleless injector is pushed backwards, the needleless injector acts on the locking mechanism from the unlocking mechanism in the process of moving backwards along the mounting table, so that the locking mechanism is unlocked, the elastic energy storage component releases energy, the sliding component moves forwards under the action of the energy released by the elastic energy storage component, and the sliding component pushes the striker connected with the sliding component to move forwards, so that injection is completed.
2. The excitation wheel is rotatably arranged on the excitation shaft, and the aim of arranging the excitation wheel is to reduce friction resistance when the lock catch body moves, so that the gas spring mixed type passive continuous needleless injector has smaller resistance and smoother movement when in energy storage and excitation injection, and the aim of reducing working strength is achieved;
3. the invention can lock the position of the needleless injector on the mounting table through the limit mechanism, thereby preventing the whole needleless injector from being carried to move backwards in the process of moving the sliding component backwards to store energy of the elastic energy storage component, avoiding the locking mechanism from being misunderstood and locked, avoiding causing safety accidents and achieving the purpose of protecting operators;
4. the invention is also provided with the elastic return piece, after the locking mechanism is unlocked, the whole needleless injector can return automatically, so that the trouble of manual return is avoided, and the follow-up operation by operators is convenient.
Drawings
FIG. 1 is a schematic view of the self-priming device for a needleless injector of the present invention;
fig. 2 is an enlarged view of a portion a of fig. 1;
FIG. 3 is a schematic view of the self-unlocking mechanism of the present invention unlocking the locking mechanism;
fig. 4 is an enlarged view of a portion B of fig. 1;
fig. 5 is a schematic view of the structure of the needleless injector of the present invention.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1, 2, 3, 4 and 5, a self-energizing device for a needleless injector, the needleless injector 1 comprises a fixed component, a sliding component slidingly fitted to the fixed component, an elastic energy storage component arranged between the fixed component and the sliding component, and at least one locking mechanism, wherein the sliding component is used for compressing the elastic energy storage component to store energy during backward movement; the locking mechanism is used for locking the position of the sliding assembly relative to the fixed assembly after the sliding assembly moves backwards relative to the fixed assembly to the energy storage completion position;
the automatic unlocking device comprises a mounting table 2 and a self-unlocking mechanism 3 corresponding to the locking mechanism, wherein the needleless injector 1 is in sliding fit on the mounting table 2; the self-unlocking mechanism 3 is adapted to act on the locking mechanism to unlock the locking mechanism to allow the elastic energy storage assembly to release energy during at least part of the locking mechanism locking the position of the sliding assembly relative to the fixed assembly and the needleless injector 1 being moved backwards along the mounting table 2.
Specifically, when injection operation is required, the needleless injector 1 is pushed backwards, the needleless injector 1 acts on the locking mechanism from the unlocking mechanism 3 in the process of moving backwards along the mounting table 2, so that the locking mechanism is unlocked, the elastic energy storage component releases energy, the sliding component moves forwards under the action of the energy released by the elastic energy storage component, and the sliding component pushes the striker connected with the sliding component to move forwards, so that injection is completed.
In this embodiment, as shown in fig. 5, the fixing assembly includes a housing 17 and an inner cylinder 13 located in the housing 17 and fixedly connected to the housing 17, the housing 17 is slidably mounted on the mounting table 2, and a rear end of the inner cylinder 13 is open;
the sliding assembly comprises an outer cylinder 14, wherein the outer cylinder 14 is positioned between the shell 17 and the inner cylinder 13 and is respectively in sliding fit with the outer cylinder 14 and the inner cylinder 13, and the rear end of the outer cylinder 14 is opened;
the elastic energy storage assembly comprises an energy storage elastic piece 15 arranged between the outer cylinder 14 and the fixing assembly, and an energy storage cavity 16 formed between the outer cylinder 14 and the inner cylinder 13.
In this embodiment, as shown in fig. 5, a hollow push rod is further slidably disposed in the inner cylinder 13, a check valve is respectively mounted at a front end portion of the inner cylinder 13 and a rear end portion of the hollow push rod, external air can enter the hollow push rod through the check valve at the rear end portion of the hollow push rod, air in the hollow push rod can enter the energy storage cavity 16 through the check valve at the front end portion of the inner cylinder 13, and when the locking mechanism locks the position of the outer cylinder 14 and the energy stored in the elastic energy storage component is lower than the demand, the air is pushed forward by pushing the hollow push rod to press the air into the energy storage cavity 16 in the past, so as to increase the energy stored in the energy storage cavity 16.
In this embodiment, as shown in fig. 5, the needleless injector further includes an injection head assembly mounted at a front end portion of the fixing assembly and used for accommodating a medical fluid, a plunger mounted at a front end portion of the sliding assembly, and a medical fluid push rod connected to the front end portion of the plunger, wherein the front end portion of the medical fluid push rod extends into the injection head assembly.
As shown in fig. 1, 3 and 5, the locking mechanism comprises a lock catch assembly 11 and a matching part 12 mounted on the fixed assembly; wherein,,
the latch assembly 11 includes a latch body 112 hinged to the sliding assembly through a latch shaft 111, and a locking elastic member 113 provided between the sliding assembly and the latch body 112;
the latch body 112 is used to be hooked on the mating portion 12 through its rear end portion to lock the position of the sliding assembly relative to the fixed assembly.
In this embodiment, the locking elastic member 113 is a torsion spring, and the torsion spring forces the latch body 112 to be always inclined from front to rear toward the sliding assembly.
In this embodiment, the engaging portion 12 is provided on the inner cylinder 13 and protrudes from the housing 17.
In the present embodiment, after the rear end portion of the latch body 112 is hung on the engaging portion 12, the distance between the surface of the latch body 112 on the side of the far sliding member and the sliding member gradually decreases from front to rear.
As shown in fig. 1, 2 and 3, the self-unlocking mechanism 3 includes an exciting shaft 31 having a lower end part mounted on the mounting table 2 and an exciting wheel 32 rotatably mounted on an upper end part of the exciting shaft 31; wherein,,
the trigger wheel 32 is used to roll the latch body 112 during at least part of the rearward movement of the needleless injector 1 along the mounting table 2 to rotate the rear end of the latch body 112 away from the slide assembly to disengage the mating portion 12.
Specifically, the exciting wheel 32 is rotatably mounted on the exciting shaft 31, and the purpose of mounting the exciting wheel 32 is to reduce friction resistance when the lock catch body 112 moves, so that the gas spring mixed type passive continuous needleless injector has smaller resistance when energy storage and excitation injection are performed, and the movement is smoother, thereby achieving the purpose of reducing working strength.
As shown in fig. 1, in order to facilitate the resetting of the needleless injector 1, the self-excitation device for needleless injector further comprises an elastic return element 4 arranged between the mounting table 2 and the needleless injector 1, wherein the elastic return element 4 is used for driving the needleless injector 1 to return through rebound after the needleless injector 1 moves backwards along the mounting table 2 to be in place.
Specifically, the invention is also provided with the elastic return piece 4, after the locking mechanism is unlocked, the whole needleless injector can return automatically, so that the trouble of manual return is avoided, and the follow-up operation of operators is facilitated.
In order to prevent the entire needleless injector 1 from moving backward during the backward pulling of the sliding member as shown in fig. 1, 4, the self-energizing device for needleless injector further comprises a stopper mechanism 5 provided between the mounting table 2 and the needleless injector 1, the stopper mechanism 5 being for restricting the needleless injector 1 on the mounting table 2.
As shown in fig. 1 and 4, the limiting mechanism 5 includes a positioning hole 51 provided on the mounting table 2 and a positioning assembly movably mounted on the needleless injector 1; wherein,,
the positioning assembly extends through at least a portion thereof into the positioning hole 51 to define the needleless injector 1 on the mounting table 2.
As shown in fig. 1 and 4, the positioning assembly comprises a positioning body 521 mounted on the needleless injector 1, a plug 522 extending into the positioning body 521, and a limit pin 523 inserted into the upper end of the plug 522; wherein,,
the positioning body 521 is provided with a transverse groove and a vertical groove 524 which are mutually communicated, the transverse groove and the vertical groove 524 form a T shape together, and the transverse groove is positioned on the upper end surface of the positioning body 521;
when the limit pin 523 is positioned in the transverse groove, the lower end part of the bolt 522 is separated from the positioning hole 51; when the limit pin 523 enters the vertical groove 524, the lower end of the latch 522 may extend into the positioning hole 51.
As shown in fig. 1 and 4, in order to facilitate the insertion pin 522 to extend into the positioning hole 51, the positioning assembly further includes a positioning elastic member 525, the insertion pin 522 is provided with a resisting portion, the positioning elastic member 525 is sleeved on the insertion pin 522, and abuts against between the resisting portion and the positioning body 521, so as to push the limiting pin 523 to move downward through rebound thereof when the limiting pin 523 aligns with the vertical groove 524.
In this embodiment, the positioning elastic member 525 is a spring.
As shown in fig. 1, for convenience of sliding the needleless injector 1 on the mounting table 2, the self-energizing device for needleless injector further comprises a connection plate 6, the needleless injector 1 is mounted on the connection plate 6, and the connection plate 6 is slidably fitted on the mounting table 2.
In this embodiment, the limiting mechanism 5 is disposed between the connection plate 6 and the mounting base 2.
In this embodiment, as shown in fig. 1, two guide rails arranged in parallel in the left-right direction are mounted on the mounting table 2, and the front, rear, left and right of the connecting plate 6 are respectively provided with a slider, and the sliders are slidably mounted on the corresponding guide rails.
In this embodiment, the elastic return member 4 includes two return springs, each of which is sleeved on one of the guide rails, the front end of the return spring is connected to the corresponding slider at the rear, and the rear end of the return spring is connected to the corresponding guide rail seat of the fixed guide rail.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (10)
1. A self-excitation device for a needleless injector (1) comprising a fixed assembly, a sliding assembly slidingly fitted to the fixed assembly, an elastic energy storage assembly arranged between the fixed assembly and the sliding assembly, and at least one locking mechanism, the sliding assembly being adapted to compress the elastic energy storage assembly during rearward movement to store energy in the elastic energy storage assembly; the locking mechanism is used for locking the position of the sliding assembly relative to the fixed assembly after the sliding assembly moves backwards relative to the fixed assembly to the energy storage completion position, and is characterized in that,
the automatic unlocking device comprises a mounting table (2) and a self-unlocking mechanism (3) corresponding to the locking mechanism, wherein the needleless injector (1) is in sliding fit on the mounting table (2); the self-unlocking mechanism (3) is used for acting on the locking mechanism to unlock the locking mechanism to enable the elastic energy storage component to release energy during at least part of the process that the locking mechanism locks the position of the sliding component relative to the fixed component and the needleless injector (1) moves backwards along the mounting table (2).
2. A self-priming device for a needleless injector as claimed in claim 1, in which,
the locking mechanism comprises a lock catch assembly (11) and a matching part (12) arranged on the fixed assembly; wherein,,
the locking assembly (11) comprises a locking body (112) hinged on the sliding assembly through a locking shaft (111) and a locking elastic piece (113) arranged between the sliding assembly and the locking body (112);
the lock catch body (112) is used for being hung and buckled on the matching part (12) through the rear end part of the lock catch body so as to lock the position of the sliding assembly relative to the fixed assembly.
3. A self-priming device for a needleless injector as claimed in claim 2, in which,
after the rear end portion of the lock body (112) is hung on the engagement portion (12), the distance between the surface of the lock body (112) on the side of the slide assembly and the slide assembly gradually decreases from front to rear.
4. A self-priming device for a needleless injector as claimed in claim 3, in which,
the self-unlocking mechanism (3) comprises an excitation shaft (31) with the lower end part mounted on the mounting table (2) and an excitation wheel (32) rotatably mounted on the upper end part of the excitation shaft (31); wherein,,
the excitation wheel (32) is used for rolling the lock catch body (112) during at least part of the backward movement of the needleless injector (1) along the mounting table (2) so as to enable the rear end part of the lock catch body (112) to rotate back to the sliding assembly to be separated from the matching part (12).
5. A self-priming device for a needleless injector as claimed in claim 1, in which,
the device also comprises an elastic return piece (4) arranged between the mounting table (2) and the needleless injector (1), wherein the elastic return piece (4) is used for driving the needleless injector (1) to return through rebound after the needleless injector (1) moves backwards to the proper position along the mounting table (2).
6. A self-priming device for a needleless injector as claimed in claim 1, in which,
the device also comprises a limiting mechanism (5) arranged between the mounting table (2) and the needleless injector (1), wherein the limiting mechanism (5) is used for limiting the needleless injector (1) on the mounting table (2).
7. A self-priming device for a needleless injector as claimed in claim 6, in which,
the limiting mechanism (5) comprises a positioning hole (51) arranged on the mounting table (2) and a positioning assembly movably arranged on the needleless injector (1); wherein,,
the positioning assembly projects through at least a portion thereof into the positioning hole (51) to define the needleless injector (1) on the mounting table (2).
8. A self-priming device for a needleless injector as claimed in claim 7, in which,
the positioning assembly comprises a positioning body (521) arranged on the needleless injector (1), a bolt (522) extending into the positioning body (521) and a limiting pin (523) inserted into the upper end part of the bolt (522); wherein,,
the positioning body (521) is provided with a transverse groove and a vertical groove (524) which are communicated with each other, the transverse groove and the vertical groove (524) form a T shape together, and the transverse groove is positioned on the upper end face of the positioning body (521);
when the limiting pin (523) is positioned in the transverse groove, the lower end part of the bolt (522) is separated from the positioning hole (51); when the limiting pin (523) enters the vertical groove (524), the lower end part of the bolt (522) can extend into the positioning hole (51).
9. A self-priming device for a needleless injector as claimed in claim 8, in which,
the positioning assembly further comprises a positioning elastic piece (525), the bolt (522) is provided with a resisting part, the positioning elastic piece (525) is sleeved on the bolt (522) and abutted between the resisting part and the positioning body (521), and the positioning elastic piece is used for pushing the limiting pin (523) to move downwards through rebound of the limiting pin (523) when the limiting pin (523) is aligned with the vertical groove (524).
10. A self-priming device for a needleless injector as claimed in claim 1, in which,
the needle-free injector is characterized by further comprising a connecting plate (6), wherein the needle-free injector (1) is installed on the connecting plate (6), and the connecting plate (6) is in sliding fit with the installation table (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210702794.0A CN115154766B (en) | 2022-06-21 | 2022-06-21 | Self-energizing device for needleless injector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210702794.0A CN115154766B (en) | 2022-06-21 | 2022-06-21 | Self-energizing device for needleless injector |
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| CN115154766A CN115154766A (en) | 2022-10-11 |
| CN115154766B true CN115154766B (en) | 2023-10-20 |
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| CN202210702794.0A Active CN115154766B (en) | 2022-06-21 | 2022-06-21 | Self-energizing device for needleless injector |
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| Publication number | Publication date |
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| CN115154766A (en) | 2022-10-11 |
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Effective date of registration: 20230525 Address after: Floor 8, Building 1, No. 22 Xiushui Road, Medical High tech Industrial Development Zone, Taizhou City, Jiangsu Province, 225300 Applicant after: Jiangsu Leju Pharmaceutical Technology Co.,Ltd. Address before: 225300 floor 8-9, building 1, No. 22, Xiushui Road, medical high tech Zone, Taizhou City, Jiangsu Province Applicant before: Jiangsu yimingrong pharmaceutical medical technology Co.,Ltd. |
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