CN110124158B - Reset assembly for syringe - Google Patents
Reset assembly for syringe Download PDFInfo
- Publication number
- CN110124158B CN110124158B CN201910478483.9A CN201910478483A CN110124158B CN 110124158 B CN110124158 B CN 110124158B CN 201910478483 A CN201910478483 A CN 201910478483A CN 110124158 B CN110124158 B CN 110124158B
- Authority
- CN
- China
- Prior art keywords
- reset
- inner cavity
- piston
- cylinder barrel
- core rod
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 239000003814 drug Substances 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying 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
- A61M5/31—Details
Abstract
The invention relates to the technical field of syringes, in particular to a resetting component of a syringe, which comprises: resetting the core bar; a reset cylinder having an inner cavity for containing a fluid medium; resetting the piston; when the piston of the injector needs to be reset, the reset core rod is firstly moved downwards, so that the fluid medium in the inner cavity pushes the reset cylinder barrel to move upwards, then the reset core rod is inserted into the injector to be in contact with the piston, the injector is fixed relative to the reset assembly, and then the piston can be jacked upwards by the reset core rod only by pushing the reset cylinder barrel downwards, so that the piston is reset, and a certain distance is kept between the piston and the push rod after each injection, so that the piston impacts the push rod to form injection, and the liquid medicine in the same needle cylinder can be quantitatively injected for a plurality of times.
Description
Technical Field
The invention relates to the technical field of syringes, in particular to a resetting component of a syringe.
Background
The prior pen-type needleless injector generally comprises a piston assembly and a medicine core assembly, when in use, a fluid medium pushes a piston in the piston assembly to strike a push rod in the medicine core assembly, and the push rod is used for shooting and spraying medicine liquid in a needle cylinder from an injection hole of the needle cylinder to form high-pressure jet flow for injection, in the quantitative injection process of the injector, a patient needs to reset the injector after each quantitative injection of the injector for the next quantitative injection, and a separate tool related to the resetting of the injector on the market does not appear at present.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that the piston of the needleless injector in the prior art cannot be retracted by a quantitative stroke after one injection, so that the needleless injector cannot perform quantitative injection on liquid medicine in the same needle cylinder for a plurality of times, the resetting component of the injector is provided.
The technical scheme adopted for solving the technical problems is as follows: a reset assembly for a syringe, the reset assembly comprising:
the reset core rod is used for pushing the piston of the injector to reset;
the reset cylinder barrel is provided with an inner cavity for containing a fluid medium, and the reset core rod is arranged at the upper end of the inner cavity in a sliding manner;
the reset piston is inserted into the lower end of the inner cavity, and the inner cavity is connected with the reset piston in a sliding way;
the reset piston is fixed on the base, a fluid medium is filled between the reset core rod and the reset piston in the inner cavity, a stress surface for the fluid medium to push the reset cylinder barrel to move upwards along the reset piston is arranged in the inner cavity, and when the reset core rod pushes the fluid medium downwards, the fluid medium pushes the reset cylinder barrel to move upwards along the reset piston from the stress surface of the inner cavity; when the reset cylinder barrel pushes the fluid medium downwards, the fluid medium pushes the reset core rod to move upwards along the inner cavity from the bottom of the reset core rod.
When the piston of the injector needs to be reset, firstly, the reset core rod is downwards moved to enable the fluid medium in the inner cavity to push the reset cylinder barrel to upwards move, then the reset core rod is inserted into the injector to enable the injector to be in contact with the piston, the injector is fixed relative to the reset assembly, and then the piston can be upwards jacked by the reset core rod only by downwards pressing the reset cylinder barrel, so that the piston is reset; wherein, the stroke of the reset core rod moving upwards is controlled by controlling the stroke of the reset cylinder barrel moving downwards.
Further, the upper section of the inner cavity is thin and the lower section of the inner cavity is thick, a step surface is formed between the thick section and the thin section of the inner cavity, the step surface is the stress surface, the reset core rod is slidably arranged in the thin section of the inner cavity, and the reset piston is slidably arranged in the thick section of the inner cavity.
Further, a sealing ring is arranged between the reset core rod and the inner cavity, and a sealing ring is also arranged between the reset piston and the inner cavity.
In order to accurately control the upward moving stroke of the reset core rod, further, a reset rotating sleeve is sleeved outside the reset cylinder barrel, the reset rotating sleeve is rotationally arranged on the base, an adjusting sleeve is connected in the reset rotating sleeve in a transmission mode, the adjusting sleeve is located below the reset cylinder barrel, when the reset rotating sleeve is rotated, the adjusting sleeve is close to or far away from the reset cylinder barrel relatively, the distance between the adjusting sleeve and the reset cylinder barrel relatively is changed, the downward moving stroke of the reset cylinder barrel at the highest stroke point is quantified, namely, the reset cylinder barrel is located at the lowest stroke point when the reset cylinder barrel is blocked by the adjusting sleeve, and the stroke of the reset core rod can be determined by determining the stroke of the reset cylinder barrel.
Further, the inner wall of the resetting rotary sleeve is in threaded connection with the outer wall of the adjusting sleeve, a guide rod is fixed on the base, and the guide rod penetrates through the adjusting sleeve and is in sliding connection with the adjusting sleeve.
Further, a guide hole is formed in the reset cylinder barrel, and the guide rod is slidably connected in the guide hole.
Further, the bottom of the resetting rotary sleeve outwards extends to form a bottom edge, a pressing plate is fixed on the base through a screw, the pressing plate is limited above the bottom edge, and the resetting rotary sleeve is supported by the base.
In order to prevent the reset cylinder from sliding off the reset piston, further, an annular bulge is arranged on the outer circumferential surface of the reset cylinder, a limiting surface is arranged on the inner wall of the reset rotary sleeve, and the limiting surface is positioned right above the annular bulge.
In order to clearly grasp the downward-movable stroke of the reset cylinder barrel after adjustment during operation, further, the outer wall of the reset cylinder barrel is provided with length scale marks.
The beneficial effects of the invention are as follows: when the piston of the injector needs to be reset, the reset component of the injector firstly moves down the reset core rod to enable the fluid medium in the inner cavity to push the reset cylinder barrel to move upwards, then inserts the reset core rod into the injector to enable the reset core rod to be in contact with the piston, fixes the injector relative to the reset component, and then only presses down the reset cylinder barrel to push the piston upwards to reset the piston, so that a certain distance is kept between the piston and the push rod after each injection, the piston can conveniently impact the push rod to form injection, and then the liquid medicine in the same syringe can be quantitatively injected for many times.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a three-dimensional schematic view of a reset assembly of a syringe of the present invention;
FIG. 2 is a schematic cross-sectional view of a reset assembly reset core rod of the injector of the present invention moved downward;
FIG. 3 is an enlarged schematic view of a portion of FIG. 2A;
FIG. 4 is an enlarged partial schematic view of B in FIG. 2;
fig. 5 is a schematic cross-sectional view of the reset assembly reset core of the injector of the present invention with the reset core moved upward.
In the figure: 1. the device comprises a reset core rod, 2, a reset cylinder barrel, 2-1, an inner cavity, 2-11, a thin section, 2-12, a thick section, 2-13, a stress surface, 2-2, a guide hole, 2-3, an annular bulge, 3, a reset piston, 4, a base, 5, a sealing ring, 6, a reset rotary sleeve, 6-1, a bottom edge, 6-2, a limiting surface, 7, an adjusting sleeve, 8, a guide rod, 9, a screw, 10, a pressing plate, 11 and a length scale mark.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only those features which are relevant to the invention, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-5, a reset assembly for a syringe, the reset assembly comprising:
the resetting core bar 1 is used for pushing the piston of the injector to reset;
a reset cylinder barrel 2 provided with an inner cavity 2-1 for containing a fluid medium, wherein the reset core rod 1 is arranged at the upper end of the inner cavity 2-1 in a sliding manner;
the reset piston 3 is inserted into the lower end of the inner cavity 2-1, and the inner cavity 2-1 is in sliding connection with the reset piston 3;
the base 4 is fixed on the base 4, a fluid medium is filled between the reset core rod 1 and the reset piston 3 in the inner cavity 2-1, a stress surface 2-13 for the fluid medium to push the reset cylinder barrel 2 to move upwards along the reset piston 3 is arranged in the inner cavity 2-1, and when the reset core rod 1 pushes the fluid medium downwards, the fluid medium pushes the reset cylinder barrel 2 to move upwards along the reset piston 3 from the stress surface 2-13 of the inner cavity 2-1; when the reset cylinder 2 pushes the fluid medium downwards, the fluid medium pushes the reset core bar 1 upwards along the inner cavity 2-1 from the bottom of the reset core bar 1.
In particular, the fluid medium may be a gas or hydraulic oil.
The outer wall of the reset cylinder barrel 2 is provided with a length scale mark 11 so as to clearly grasp the stroke of the reset cylinder barrel 2 which can move downwards after adjustment during operation.
The upper section of the inner cavity 2-1 is thin and the lower section is thick, a step surface is formed between the thick section 2-12 and the thin section 2-11 of the inner cavity 2-1, the step surface is the stress surface 2-13, the reset core rod 1 is slidably arranged in the thin section 2-11 of the inner cavity 2-1, and the reset piston 3 is slidably arranged in the thick section 2-12 of the inner cavity 2-1.
A sealing ring 5 is arranged between the reset core rod 1 and the inner cavity 2-1, and a sealing ring 5 is also arranged between the reset piston 3 and the inner cavity 2-1.
The outer sleeve of the reset cylinder barrel 2 is provided with a reset rotary sleeve 6, the reset rotary sleeve 6 is rotatably arranged on the base 4, an adjusting sleeve 7 is connected in the reset rotary sleeve 6 in a transmission manner, the adjusting sleeve 7 is positioned below the reset cylinder barrel 2, when the reset rotary sleeve 6 is rotated, the adjusting sleeve 7 is close to or far away from the reset cylinder barrel 2, the distance between the adjusting sleeve 7 and the reset cylinder barrel 2 is changed, so that the stroke of the reset cylinder barrel 2 at the highest stroke point is quantified, namely, the reset cylinder barrel 2 is positioned at the lowest stroke point when the reset cylinder barrel 2 is blocked by the adjusting sleeve 7, and the stroke of the reset core rod 1 can be determined by determining the stroke of the reset cylinder barrel 2.
The inner wall of the reset rotary sleeve 6 is in threaded connection with the outer wall of the adjusting sleeve 7, a guide rod 8 is fixed on the base 4, the guide rod 8 penetrates through the adjusting sleeve 7 and is in sliding connection with the adjusting sleeve 7, a guide hole 2-2 is formed in the reset cylinder barrel 2, and the guide rod 8 is in sliding connection with the guide hole 2-2.
The bottom of the resetting rotary sleeve 6 extends outwards to form a bottom edge 6-1, a pressing plate 10 is fixed on the base 4 through a screw 9, the pressing plate 10 is limited above the bottom edge 6-1, and the base 4 holds the resetting rotary sleeve 6, so that the resetting rotary sleeve 6 is rotatably arranged on the base 4, and the axial position of the resetting rotary sleeve is limited.
The outer peripheral surface of the reset cylinder barrel 2 is provided with an annular bulge 2-3, the inner wall of the reset rotary sleeve 6 is provided with a limiting surface 6-2, and the limiting surface 6-2 is positioned right above the annular bulge 2-3, so that the reset cylinder barrel 2 and the reset piston 3 can be prevented from being separated.
When the resetting component of the injector is used, firstly, the stroke of the piston required to retract is determined according to the stroke required by the quantity to be injected of the liquid medicine, after the downward stroke of the resetting cylinder barrel 2 is determined, the resetting cylinder barrel 2 is moved down to the reading on the length scale mark 11 corresponding to the end face of the resetting rotary sleeve 6 when the stroke is finished, and then the resetting rotary sleeve 6 is rotated to change the distance between the adjusting sleeve 7 and the resetting cylinder barrel 2 until the adjusting sleeve 7 abuts against the bottom of the resetting cylinder barrel 2;
then the reset core rod 1 is moved downwards, so that the fluid medium in the inner cavity 2-1 pushes the reset cylinder barrel 2 to move upwards to the highest stroke point; then the drug core assembly on the injector is disassembled so that the reset core bar 1 is inserted into the injector and contacted with the piston of the injector;
then the injector can be held by hand to be fixed relative to the reset assembly, and finally the reset cylinder barrel 2 is only pressed downwards until the bottom of the reset cylinder barrel 2 is propped against by the adjusting sleeve 7, so that the piston can be jacked up by the reset core rod 1, and the piston can be reset accurately.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
1. A reset assembly for an injector, comprising: the reset assembly includes:
the reset core bar (1) is used for pushing the piston of the injector to reset;
a reset cylinder barrel (2) provided with an inner cavity (2-1) for containing a fluid medium, wherein the reset core rod (1) is arranged at the upper end of the inner cavity (2-1) in a sliding manner;
the reset piston (3) is inserted into the lower end of the inner cavity (2-1), and the inner cavity (2-1) is in sliding connection with the reset piston (3);
the reset piston (3) is fixed on the base (4), a fluid medium is filled between the reset core rod (1) and the reset piston (3) in the inner cavity (2-1), a stress surface (2-13) for the fluid medium to push the reset cylinder barrel (2) to move upwards along the reset piston (3) is arranged in the inner cavity (2-1), and when the reset core rod (1) pushes the fluid medium downwards, the fluid medium pushes the reset cylinder barrel (2) to move upwards along the reset piston (3) from the stress surface (2-13) of the inner cavity (2-1); when the reset cylinder barrel (2) pushes the fluid medium downwards, the fluid medium pushes the reset core rod (1) to move upwards along the inner cavity (2-1) from the bottom of the reset core rod (1);
the upper section of the inner cavity (2-1) is thin and the lower section is thick, a step surface is formed between the thick section (2-12) and the thin section (2-11) of the inner cavity (2-1), the step surface is the stress surface (2-13), the reset core rod (1) is slidably arranged in the thin section (2-11) of the inner cavity (2-1), and the reset piston (3) is slidably arranged in the thick section (2-12) of the inner cavity (2-1).
2. The reset assembly of the syringe of claim 1 wherein: a sealing ring (5) is arranged between the reset core rod (1) and the inner cavity (2-1), and a sealing ring (5) is also arranged between the reset piston (3) and the inner cavity (2-1).
3. The reset assembly of the syringe of claim 1 wherein: the utility model discloses a reset cylinder (2) overcoat is equipped with resets and revolves cover (6), reset revolves cover (6) and rotate and set up on base (4), reset revolves cover (6) internal transmission and is connected with adjusting sleeve (7), adjusting sleeve (7) are located the below that resets cylinder (2), and when revolving cover (6) that resets, adjusting sleeve (7) are close to or keep away from relative cylinder (2) that resets.
4. A reset assembly for a syringe as set forth in claim 3, wherein: the inner wall of the resetting rotary sleeve (6) is in threaded connection with the outer wall of the adjusting sleeve (7), a guide rod (8) is fixed on the base (4), and the guide rod (8) penetrates through the adjusting sleeve (7) and is in sliding connection with the adjusting sleeve (7).
5. The reset assembly of the syringe of claim 4 wherein: the reset cylinder barrel (2) is provided with a guide hole (2-2), and the guide rod (8) is slidably connected in the guide hole (2-2).
6. A reset assembly for a syringe as set forth in claim 3, wherein: the bottom of the resetting rotary sleeve (6) extends outwards to form a bottom edge (6-1), a pressing plate (10) is fixed on the base (4) through a screw (9), the pressing plate (10) is limited above the bottom edge (6-1), and the base (4) holds the resetting rotary sleeve (6).
7. A reset assembly for a syringe as set forth in claim 3, wherein: the reset cylinder barrel (2) is provided with an annular bulge (2-3) on the outer peripheral surface, the inner wall of the reset rotary sleeve (6) is provided with a limiting surface (6-2), and the limiting surface (6-2) is positioned right above the annular bulge (2-3).
8. A reset assembly for a syringe as set forth in claim 3, wherein: the outer wall of the reset cylinder barrel (2) is provided with a length scale mark (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910478483.9A CN110124158B (en) | 2019-06-03 | 2019-06-03 | Reset assembly for syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910478483.9A CN110124158B (en) | 2019-06-03 | 2019-06-03 | Reset assembly for syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110124158A CN110124158A (en) | 2019-08-16 |
| CN110124158B true CN110124158B (en) | 2024-02-20 |
Family
ID=67579996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910478483.9A Active CN110124158B (en) | 2019-06-03 | 2019-06-03 | Reset assembly for syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110124158B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09225031A (en) * | 1996-02-28 | 1997-09-02 | Terumo Corp | Quantitative dispenser |
| CN101172177A (en) * | 2006-11-02 | 2008-05-07 | 贺长军 | Continuous injector injection regulating mechanism |
| CN201375732Y (en) * | 2009-04-03 | 2010-01-06 | 王军喜 | Electromagnetic type automatic needleless injector |
| CN201469817U (en) * | 2009-08-13 | 2010-05-19 | 王喜增 | Continuous injector |
| WO2017012432A1 (en) * | 2015-07-20 | 2017-01-26 | 山东新华安得医疗用品有限公司 | Sealed syringe |
| CN210494794U (en) * | 2019-06-03 | 2020-05-12 | 江苏丞宇米特医疗科技有限公司 | Reset assembly of syringe |
-
2019
- 2019-06-03 CN CN201910478483.9A patent/CN110124158B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09225031A (en) * | 1996-02-28 | 1997-09-02 | Terumo Corp | Quantitative dispenser |
| CN101172177A (en) * | 2006-11-02 | 2008-05-07 | 贺长军 | Continuous injector injection regulating mechanism |
| CN201375732Y (en) * | 2009-04-03 | 2010-01-06 | 王军喜 | Electromagnetic type automatic needleless injector |
| CN201469817U (en) * | 2009-08-13 | 2010-05-19 | 王喜增 | Continuous injector |
| WO2017012432A1 (en) * | 2015-07-20 | 2017-01-26 | 山东新华安得医疗用品有限公司 | Sealed syringe |
| CN210494794U (en) * | 2019-06-03 | 2020-05-12 | 江苏丞宇米特医疗科技有限公司 | Reset assembly of syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110124158A (en) | 2019-08-16 |
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