CN210813165U - Disposable precision quantitative injector - Google Patents

Disposable precision quantitative injector Download PDF

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Publication number
CN210813165U
CN210813165U CN201921535830.9U CN201921535830U CN210813165U CN 210813165 U CN210813165 U CN 210813165U CN 201921535830 U CN201921535830 U CN 201921535830U CN 210813165 U CN210813165 U CN 210813165U
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China
Prior art keywords
movable sleeve
elastic strip
core rod
arc
shaped groove
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CN201921535830.9U
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Chinese (zh)
Inventor
徐伟
徐爱萍
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Changzhou Shuangma Medical Devices Co ltd
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Changzhou Shuangma Medical Devices Co ltd
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Abstract

The utility model relates to the technical field of injectors, in particular to a disposable precise quantitative injector, which comprises a needle cylinder, a core rod and a piston, wherein the core rod is sleeved with a movable sleeve which is used for forming a limit after contacting with the needle cylinder, an elastic strip is fixed on the inner circumferential surface of the movable sleeve along the axial direction of the movable sleeve, and an outer arc-shaped groove for accommodating the elastic strip is arranged on the outer circumferential surface of the core rod along the axial direction of the movable sleeve, the device is convenient, can effectively improve the working efficiency, and has simple structure and low cost.

Description

Disposable precision quantitative injector
Technical Field
The utility model belongs to the technical field of the syringe technique and specifically relates to a precise quantitative syringe of disposable.
Background
The injector is a medical apparatus with wide application, and is used for subcutaneous injection, intramuscular injection, intravenous injection and the like, the structure of the traditional injector mainly comprises a needle cylinder, a piston, a core bar and a needle head, and when the injector is used, the liquid medicine in the needle cylinder is ejected from the needle head by pushing the core bar and utilizing the piston on the core bar; obviously, when the traditional syringe injects liquid medicine with strict dosage requirements, the traditional syringe poses a very high problem to the proficiency of medical care personnel, and once the liquid medicine is injected too much or too little, the treatment effect on patients is influenced;
therefore, many quantitative injectors are also available on the market at present, for example, an injector with an accurate quantitative function disclosed in chinese patent with publication number CN107335112A, such a quantitative injector generally has a positioning sleeve in threaded connection with a core rod, and the positioning sleeve is in contact with a needle cylinder after moving a certain distance along with the core rod to form a limit, so that the adjustment of the injection dosage is realized by changing the axial position of the positioning sleeve on the core rod, although quantitative injection can be realized by connecting the positioning sleeve with the core rod in a threaded manner, in the actual use process, the positioning sleeve needs to be rotated many turns to move the positioning sleeve to a specified position, which results in the problems of troublesome use and low injection efficiency.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problems that in the prior art, quantitative injection is realized by a mode that an injector is connected with a positioning sleeve through threads, the use is troublesome and the injection efficiency is low, a disposable precise quantitative injector is provided.
The utility model provides a technical scheme that its technical problem adopted is: a disposable precise quantitative injector comprises a needle cylinder, a core rod and a piston, wherein the piston is fixed on the core rod, the piston is arranged in the needle cylinder in a sliding mode, a movable sleeve used for limiting after being in contact with the needle cylinder is sleeved on the core rod, an elastic strip with elasticity is fixed on the inner circumferential surface of the movable sleeve along the axis direction of the movable sleeve, and an outer arc-shaped groove used for containing the elastic strip is formed in the outer circumferential surface of the core rod along the axis direction of the movable sleeve.
When utilizing the elastic strip on the movable sleeve to be located the outer arc groove on the core bar in this scheme, can directly freely remove the movable sleeve along the axis direction of core bar, so that adjust the injection dosage, and when the movable sleeve removed the assigned position, only need slight circumferential direction to rotate the movable sleeve, make the elastic strip compressed, and make the elastic strip break away from outer arc groove after support tightly on the outer peripheral face of core bar, alright realize the axial positioning of movable sleeve on the core bar, thereby realize accurate ration injection, and the accommodation process of injection dosage is very quick, convenient, can effectual improvement work efficiency, the structure is also comparatively simple, and is low in cost.
Furthermore, an inner arc-shaped groove is formed in the inner circumferential surface of the movable sleeve, the elastic strip is embedded into the inner arc-shaped groove and protrudes out of the inner circumferential surface of the movable sleeve, the cross section of the inner arc-shaped groove is in a major arc shape, and the outer contour line of the cross section of the elastic strip is circular; the elastic strip can be clamped by the inner arc-shaped groove of the major arc shape, and the elastic strip is prevented from being separated from the inner arc-shaped groove.
Further, the cross section of the outer arc-shaped groove is in an inferior arc shape; therefore, when the movable sleeve is rotated, the elastic strip can easily cross the outer arc-shaped groove of the minor arc shape.
Furthermore, an elastic hole penetrates through the elastic strip along the axis direction of the elastic strip; the elasticity of the elastic strip can be increased by the arrangement of the elastic holes, and meanwhile, the elastic strip can be conveniently compressed.
Furthermore, the elastic strip is made of rubber.
Furthermore, the number of the elastic strips on the movable sleeve is two, the elastic strips are arranged in parallel, the number of the outer arc-shaped grooves on the core rod is two, the outer arc-shaped grooves are arranged in parallel, and the elastic strips correspond to the outer arc-shaped grooves one to one.
Furthermore, a side wing extends outwards from the outer peripheral surface of the movable sleeve; the arrangement of the side wings can provide an acting point for the hands of a person, and the movable sleeve is convenient to rotate.
The utility model has the advantages that: the utility model discloses an accurate quantitative syringe of disposable when its elasticity strip that utilizes on the movable sleeve lies in the outer arc groove on the core bar, can directly freely remove the axis direction of core bar along with the movable sleeve, so that adjust the injection dosage, and when the movable sleeve removed the assigned position, only need slight circumferential direction movable sleeve, make the elasticity strip compressed, and make the elasticity strip break away from and support tightly on the outer peripheral face of core bar behind the outer arc groove, alright realize the axial positioning of movable sleeve on the core bar, thereby realize accurate ration injection, and the accommodation process of injection dosage is very quick, and is convenient, can effectual improvement work efficiency, the structure is also comparatively simple, and is with low costs.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a three-dimensional schematic view of a single-use precision dosing syringe of the present invention;
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the disposable precise quantitative injector of the present invention;
FIG. 4 is a schematic view of the movable sleeve and the elastic strip installed therein of the disposable precise quantitative injector of the present invention;
FIG. 5 is a schematic view of the disposable precise quantitative injector of the present invention, in which the elastic strip of the movable sleeve is aligned with the outer arc groove;
fig. 6 is a schematic view showing that the elastic strip and the outer arc groove of the movable sleeve of the disposable precise quantitative injector of the utility model are staggered.
In the figure: 1. the device comprises a needle cylinder, 2 parts of a core rod, 2-1 parts of an outer arc-shaped groove, 3 parts of a piston, 4 parts of a movable sleeve, 4-1 parts of an inner arc-shaped groove, 4-2 parts of a side wing, 5 parts of an elastic strip, 5-1 parts of an elastic hole.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe 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. 1-6, a disposable precise quantitative injector comprises a needle cylinder 1, a core rod 2 and a piston 3, wherein the piston 3 is fixed on the core rod 2, the piston 3 is slidably arranged in the needle cylinder 1, a movable sleeve 4 for forming a limit after contacting with the needle cylinder 1 is sleeved on the core rod 2, an elastic strip 5 with elasticity is fixed on the inner circumferential surface of the movable sleeve 4 along the axial direction, and an outer arc-shaped groove 2-1 for accommodating the elastic strip 5 is formed on the outer circumferential surface of the core rod 2 along the axial direction.
An inner arc-shaped groove 4-1 is formed in the inner peripheral surface of the movable sleeve 4, the elastic strip 5 is embedded into the inner arc-shaped groove 4-1 and protrudes out of the inner peripheral surface of the movable sleeve 4, the cross section of the inner arc-shaped groove 4-1 is in a major arc shape, and the outer contour line of the cross section of the elastic strip 5 is circular; the elastic strip 5 can be clamped by the inner arc-shaped groove 4-1 in the shape of a major arc, so that the elastic strip 5 is prevented from being separated from the inner arc-shaped groove 4-1; in this embodiment, the elastic strip 5 can also be adhered to the inner arc-shaped groove 4-1 by glue, so as to increase the firmness of the elastic strip 5 in the inner arc-shaped groove 4-1.
The cross section of the outer arc-shaped groove 2-1 is shaped like a minor arc; so that the elastic strip 5 can easily cross the minor arc-shaped outer arc-shaped groove 2-1 when the movable sleeve 4 is rotated.
The elastic strip 5 is provided with an elastic hole 5-1 along the axial direction; by means of the elastic holes 5-1, the elasticity of the elastic strip 5 can be increased, and the elastic strip 5 can be compressed conveniently.
The elastic strip 5 is made of rubber.
Two elastic strips 5 on the movable sleeve 4 are arranged in parallel, two outer arc-shaped grooves 2-1 on the core rod 2 are arranged in parallel, and the elastic strips 5 correspond to the outer arc-shaped grooves 2-1 one by one.
A lateral wing 4-2 extends outwards from the peripheral surface of the movable sleeve 4; the arrangement of the side wings 4-2 can provide an acting point for the hands of a person, and the movable sleeve 4 is convenient to rotate.
The working principle of the disposable precise quantitative injector of the embodiment is as follows:
in an initial state, the elastic strip 5 on the movable sleeve 4 is opposite to the outer arc-shaped groove 2-1 on the core rod 2, the elastic strip 5 cannot be compressed, and the movable sleeve 4 can freely move along the direction of the core rod 2; after the core rod 2 is pulled backwards to draw the liquid medicine from the needle cylinder 1, the movable sleeve 4 is moved to the designated position on the core rod 2 according to the required preset injection dosage of the liquid medicine, and then the movable sleeve 4 is slightly deflected to compress the elastic strip 5, and the elastic strip 5 is separated from the outer arc-shaped groove 2-1 and then is abutted against the outer peripheral surface of the core rod 2, so that the movable sleeve 4 is axially positioned on the core rod 2; subsequently, in the process that the core rod 2 moves forwards to enable the piston 3 to push the liquid medicine in the needle cylinder 1 to inject, when the core rod 2 moves forwards until the side wing 4-2 of the movable sleeve 4 on the core rod is contacted with the end part of the needle cylinder 1, the movable sleeve 4 is blocked by the needle cylinder 1 to form limiting, so that the core rod 2 cannot be pushed forwards continuously, and the injector can inject the preset injection dosage of the liquid medicine.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. A disposable precise quantitative injector is characterized in that: the needle cylinder comprises a needle cylinder (1), a core rod (2) and a piston (3), wherein the piston (3) is fixed on the core rod (2), the piston (3) is arranged in the needle cylinder (1) in a sliding mode, a movable sleeve (4) used for limiting after being in contact with the needle cylinder (1) is sleeved on the core rod (2), an elastic strip (5) with elasticity is fixed on the inner circumferential surface of the movable sleeve (4) along the axis direction of the movable sleeve, and an outer arc-shaped groove (2-1) used for containing the elastic strip (5) is formed in the outer circumferential surface of the core rod (2) along the axis direction of the movable sleeve.
2. A single use precision dosing syringe as claimed in claim 1 wherein: an inner arc-shaped groove (4-1) is formed in the inner circumferential surface of the movable sleeve (4), the elastic strip (5) is embedded into the inner arc-shaped groove (4-1) and protrudes out of the inner circumferential surface of the movable sleeve (4), the cross section of the inner arc-shaped groove (4-1) is in a major arc shape, and the outer contour line of the cross section of the elastic strip (5) is circular.
3. A single use precision dosing syringe according to claim 2 wherein: the cross section of the outer arc-shaped groove (2-1) is shaped like a minor arc.
4. A single use precision dosing syringe as claimed in claim 1 wherein: the elastic strip (5) is provided with an elastic hole (5-1) along the axial direction.
5. A single use precision dosing syringe as claimed in claim 1 wherein: the elastic strip (5) is made of rubber.
6. A single use precision dosing syringe as claimed in claim 1 wherein: two elastic strips (5) on the movable sleeve (4) are arranged in parallel, two outer arc-shaped grooves (2-1) on the core rod (2) are arranged in parallel, and the elastic strips (5) correspond to the outer arc-shaped grooves (2-1) one by one.
7. A single use precision dosing syringe as claimed in claim 1 wherein: the outer peripheral surface of the movable sleeve (4) extends outwards to form a side wing (4-2).
CN201921535830.9U 2019-09-16 2019-09-16 Disposable precision quantitative injector Active CN210813165U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921535830.9U CN210813165U (en) 2019-09-16 2019-09-16 Disposable precision quantitative injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921535830.9U CN210813165U (en) 2019-09-16 2019-09-16 Disposable precision quantitative injector

Publications (1)

Publication Number Publication Date
CN210813165U true CN210813165U (en) 2020-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921535830.9U Active CN210813165U (en) 2019-09-16 2019-09-16 Disposable precision quantitative injector

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CN (1) CN210813165U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112957566A (en) * 2021-01-28 2021-06-15 四川省肿瘤医院 Power assisting device of pulse type injector
CN115608432A (en) * 2022-12-19 2023-01-17 中国人民解放军军事科学院军事医学研究院 Micro-syringe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112957566A (en) * 2021-01-28 2021-06-15 四川省肿瘤医院 Power assisting device of pulse type injector
CN115608432A (en) * 2022-12-19 2023-01-17 中国人民解放军军事科学院军事医学研究院 Micro-syringe

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