CN219700695U - Disposable syringe - Google Patents

Disposable syringe Download PDF

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Publication number
CN219700695U
CN219700695U CN202321090180.8U CN202321090180U CN219700695U CN 219700695 U CN219700695 U CN 219700695U CN 202321090180 U CN202321090180 U CN 202321090180U CN 219700695 U CN219700695 U CN 219700695U
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CN
China
Prior art keywords
sleeve
pen holder
trigger
syringe
air source
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Active
Application number
CN202321090180.8U
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Chinese (zh)
Inventor
翁建森
翁晨俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Senmai Hechuang Medical Technology Co.,Ltd.
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Jiaxing Senmai Medical Technology Co ltd
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Priority to CN202321090180.8U priority Critical patent/CN219700695U/en
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Abstract

The utility model discloses a disposable injector, which comprises a pen holder sleeve, wherein the rear end of the pen holder sleeve is clamped with a rear cover, the front end of the pen holder sleeve is provided with a pen cap, the front end of the pen holder sleeve is internally provided with a trigger pressing component, and the middle part of the pen holder sleeve is internally provided with an air source pushing injection component. According to the utility model, the front end of the pre-filling needle is contacted with the muscle surface of a patient, the pre-filling needle is directly pressed, the trigger sleeve is pressed backwards under the limit action of the limit sleeve to push the pressure driving rod to directly puncture the front end sealing film of the compressed air source, so that the compressed air in the compressed air source is instantaneously released to push the pre-filling rubber plug in the pre-filling needle cylinder, the liquid medicament in the pre-filling needle cylinder is injected into the muscle of the patient through the pre-filling needle, the injection is stably completed, and the problem that the injection effect is influenced by hand shake caused by manual pushing of the injector is avoided to bring additional pain to the patient.

Description

Disposable syringe
Technical Field
The utility model relates to the technical field of disposable medical instruments, in particular to a disposable syringe.
Background
The syringe is a medical tool most commonly used in the medical process, in order to avoid cross infection caused by using an unhygienic syringe, the conventional syringe has been gradually replaced by a disposable syringe in the current medical activity, the syringe is mainly used by medical staff for manual injection, the general population is difficult to use under the condition without training, but the current symptoms such as diabetes patients need to inject insulin by themselves, the general syringe is used to bring great pain to the patients and families, and in the prior art, although the syringe adopting an automatic mechanism as a driving source exists, the composition of the syringe is complex, the syringe occupies too large space, and the size of the syringe is too large to carry and use, so the disposable syringe is provided.
In the prior art, a Chinese patent document with publication number of CN213940808U and publication date of 2021, month 08 and 13 is proposed to solve the above technical problems, and the technical scheme disclosed in the patent document is as follows: a disposable negative pressure suction syringe comprising: the device comprises a needle cylinder, a piston rod, a piston and a baffle plate, wherein the piston is fixed at one end of the piston rod, the piston is positioned in an inner cavity of the needle cylinder, the piston is in close contact with the inner wall of the needle cylinder, air leakage between the piston and the inner wall of the needle cylinder is prevented, and negative pressure formed by damage is prevented. The baffle is fixed at the tail end of the needle cylinder in an inclined way, and one end of the baffle faces the piston rod. The outer surface of the piston rod is provided with a plurality of groups of annular clamping grooves, the clamping grooves are distributed along the length direction of the piston rod, one end of the baffle plate, facing the piston rod, is tightly attached to the outer surface of the piston rod, and when the clamping grooves move to one end of the baffle plate along with the piston rod, the end can slide into the clamping grooves. The injector can meet the negative pressure requirement of sucking different cystic components through the cooperation of the baffle arranged on the injector and the plurality of groups of clamping grooves arranged on the piston rod, and can prevent the condition of shaking hands in the process of pumping the injector.
In order to solve the problem of movement of an injection part, which is caused by the condition that hand shake possibly exists in the process of continuously pumping the injector, the prior art adopts a plurality of clamping grooves on a piston rod of the injector, a baffle at the tail of a syringe can relatively slide when the piston rod is pulled out, the piston rod can not be pushed back once the baffle is clamped at the clamping groove, but the piston rod can be continuously pulled out to the next clamping groove so as to ensure that the injection can be performed in a continuous negative pressure mode, but the condition that the push rod is required to be manually pressed for injection can also occur, and further the problem of hand shake needle insertion errors possibly exists when the injection is initially performed is caused.
Disclosure of Invention
The present utility model is directed to a disposable syringe to solve the above-mentioned problems.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the disposable injector comprises an injector main body, wherein the injector main body comprises a pen holder sleeve, a rear cover is arranged at the rear end of the pen holder sleeve in a clamping manner, a pen cap is arranged at the front end of the pen holder sleeve, a trigger pressing assembly is arranged in the front end of the pen holder sleeve, and an air source pushing injection assembly is arranged in the middle of the pen holder sleeve; the trigger pressing assembly comprises a trigger unit and a limit unit, the trigger unit is arranged at the front end of the interior of the pen holder sleeve, and the limit unit is arranged outside the trigger unit; the air source pushing injection assembly comprises a needle cylinder unit and a pneumatic injection unit, wherein the needle cylinder unit is arranged in the middle of the pen holder sleeve, the pneumatic injection unit is arranged at the rear end of the needle cylinder unit, the pneumatic injection unit comprises a compressed air source, compressed air is arranged in the compressed air source, a sealing film is arranged at the front port of the compressed air source, and the rear end of the compressed air source is in contact with the inner surface of the rear cover.
The technical scheme of the utility model is further improved as follows: the trigger unit comprises a trigger sleeve sleeved at the front end of the pen holder sleeve, and a compression spring is arranged in the trigger sleeve.
By adopting the technical scheme, the trigger sleeve is of a sleeve structure with a middle hole, and the rear end of the trigger sleeve penetrates through the side wall of the positioning sleeve.
The technical scheme of the utility model is further improved as follows: the limiting unit comprises a limiting sleeve sleeved in the middle of the outer surface of the trigger sleeve, a positioning sleeve is sleeved outside the limiting sleeve, an inner ring baffle ring of the positioning sleeve is in contact with the rear end of the compression spring, and the outer surface of the positioning sleeve is clamped with the inner surface of the front end of the pen holder sleeve.
By adopting the technical scheme, the limit sleeve is provided with a limit chute matched with the trigger sleeve, and the middle part of the positioning sleeve is provided with a middle hole baffle ring.
The technical scheme of the utility model is further improved as follows: the needle cylinder unit comprises a needle cylinder sleeve with the front end contacted with the rear end of the positioning sleeve, a pre-filling needle cylinder is sleeved in the needle cylinder sleeve, and a pre-filling needle head is arranged at the front end of the pre-filling needle cylinder.
By adopting the technical scheme, the needle cylinder sleeve is made of transparent materials, and the front end of the pre-filled needle cylinder penetrates through the positioning sleeve and the triggering sleeve.
The technical scheme of the utility model is further improved as follows: the outside of the prefilled syringe needle is sleeved with a prefilled syringe cap, the outer surface of the prefilled syringe cap is clamped with the inner surface of the pen cap, and a prefilled rubber plug is slidably arranged in the middle of the inner surface of the prefilled syringe.
By adopting the technical scheme, the liquid medicament is stored in the pre-filled syringe, the pre-filled needle cap seals the pre-filled needle head, and the pre-filled rubber plug plays a role of sealing a piston in the pre-filled syringe to push the injection medicament.
The technical scheme of the utility model is further improved as follows: the pneumatic injection unit comprises a pressure driving rod sleeved outside the rear end of the pre-filling and sealing needle cylinder, a clamping groove matched with the rear end of the trigger sleeve is formed in the outer side wall of the pressure driving rod, and a compressed air source is arranged at the rear end of the pressure driving rod.
By adopting the technical scheme, the rear end of the pressure driving rod is provided with the sharp socket, so that the front end sealing film of the compressed air source can be punctured to release the compressed air under the pushing of the trigger sleeve, and the sealing plug is arranged at the joint of the inner part of the pressure driving rod and the pre-filling needle cylinder.
By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress:
1. the utility model provides a disposable injector, wherein a pen holder sleeve is in a pen container shape, various components are assembled in the pen holder sleeve so as to facilitate the handheld pressing operation, and a pen cap and a rear cover play a role in sealing from front and rear ends.
2. The utility model provides a disposable injector, wherein a pen cap is pulled out, the pen cap and a prefilled needle cap are fixed together and pulled out to expose a prefilled needle head, the front end of the prefilled needle head is contacted with the muscle surface of a patient and directly pressed, the prefilled needle head pierces the skin surface, and simultaneously, a trigger sleeve is pressed back under the limit action of a limit sleeve to push a pressure driving rod to directly pierce a front end sealing film of a compressed air source, so that compressed air in the compressed air source is instantly released to push a prefilled rubber plug in the prefilled needle cylinder, liquid medicament stored in the prefilled needle cylinder is injected into the muscle of the patient through the prefilled needle head, and the injection is stably completed, thereby avoiding extra pain to the patient caused by hand shake affecting the injection effect due to manual pushing of the injector.
3. The utility model provides a disposable injector, wherein a trigger sleeve plays a role in pushing a pressure driving rod to puncture a compressed air source and release the compressed air source, a limiting sleeve plays a role in limiting the movement of the trigger sleeve, a positioning sleeve plays a role in positioning, and meanwhile, the trigger sleeve is pushed to reset to complete clamping and self-locking by matching with a compression spring after injection is completed, so that the pen cap and the prefilled needle cap are conveniently installed, collected and waiting for centralized treatment, and secondary use pollution is avoided.
4. The utility model provides a disposable injector, which uses a gas cylinder in a pen-shaped injector as a compressed gas source, uses compressed air in the compressed gas source as a drive, simplifies the whole structure of the injector, and overcomes the problems that the injector adopting an automatic mechanism as a drive source in the prior art is complex in composition, occupies too large space, is inconvenient to carry and use, and the like to a certain extent, so that the volume of the injector is miniaturized, is more stable during use, and can be easily used by a user.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
Fig. 2 is an exploded view of the structure according to an embodiment of the present utility model.
Fig. 3 is a schematic cross-sectional view of the whole structure according to the embodiment of the present utility model.
Fig. 4 is a schematic cross-sectional view of a press trigger of an embodiment of the present utility model.
FIG. 5 is a schematic diagram of a structural air source pushing section of an embodiment of the present utility model.
Fig. 6 is a schematic exploded view of a structural body according to an embodiment of the present utility model.
In the figure: 1. a syringe body; 11. a pen holder sleeve; 12. a rear cover; 13. a cap; 2. triggering the pressing assembly; 21. a trigger sleeve; 22. a limit sleeve; 23. positioning a sleeve; 24. a compression spring; 3. the air source pushes the injection assembly; 31. a syringe sleeve; 32. prefilled syringe; 321. pre-filling and sealing the needle head; 33. prefilled needle caps; 34. pre-filling and sealing the rubber plug; 35. a pressure driving rod; 36. and a compressed air source.
Detailed Description
The utility model is further illustrated by the following examples:
example 1
As shown in fig. 1-6, the utility model provides a disposable injector, which comprises an injector main body 1, wherein the injector main body 1 comprises a pen holder sleeve 11, a rear cover 12 is clamped and installed at the rear end of the pen holder sleeve 11, a pen cap 13 is arranged at the front end of the pen holder sleeve 11, a trigger pressing component 2 is arranged inside the front end of the pen holder sleeve 11, and an air source pushing injection component 3 is arranged inside the middle part of the pen holder sleeve 11.
The trigger pressing assembly 2 comprises a trigger unit and a limit unit, wherein the trigger unit is arranged at the front end of the interior of the pen holder sleeve 11, and the limit unit is arranged outside the trigger unit; the air source pushing injection assembly 3 comprises a needle cylinder unit and a pneumatic injection unit, the needle cylinder unit is arranged in the middle of the pen holder sleeve 11, the pneumatic injection unit is arranged at the rear end of the needle cylinder unit, the trigger unit comprises a trigger sleeve 21 sleeved at the front end of the pen holder sleeve 11, a compression spring 24 is arranged in the trigger sleeve 21, the pen holder sleeve 11 is in a pen holder shape, various assemblies are assembled in the pen holder shape, the pen cap 13 and the rear cover 12 are convenient to hold and press, and a sealing effect is achieved between the front end and the rear end.
The limiting unit comprises a limiting sleeve 22 sleeved in the middle of the outer surface of the trigger sleeve 21, a positioning sleeve 23 is sleeved outside the limiting sleeve 22, an inner ring baffle ring of the positioning sleeve 23 is in contact with the rear end of the compression spring 24, the outer surface of the positioning sleeve 23 is clamped with the inner surface of the front end of the pen holder sleeve 11, the trigger sleeve 21 plays a role in pushing the pressure driving rod 35 to puncture the compressed air source 36 to release the air source, and the limiting sleeve 22 plays a limiting role in the movement of the trigger sleeve 21.
Example 2
As shown in fig. 1-6, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the syringe unit includes a syringe sleeve 31 with a front end contacting with a rear end of the positioning sleeve 23, a prefilled (prefilled syringe, PFS) syringe 32 is sleeved in the syringe sleeve 31, a Prefilled (PFS) needle 321 is fixedly mounted at a front end of the Prefilled (PFS) syringe 32, the positioning sleeve 23 plays a role in positioning and cooperates with the compression spring 24 to push the triggering sleeve 21 to reset after injection is completed to complete clamping and self-locking, so that the pen cap 13 and the Prefilled (PFS) needle cap 33 are conveniently mounted and then collected and waiting for centralized treatment.
The outside of Prefilled (PFS) needle 321 is sleeved with Prefilled (PFS) needle cap 33, the outer surface of Prefilled (PFS) needle cap 33 is clamped with the inner surface of pen cap 13, prefilled (PFS) rubber plug 34 is slidably mounted in the middle of the inner surface of Prefilled (PFS) syringe 32, and Prefilled (PFS) rubber plug 34 plays a role of a piston to push the medicament inside Prefilled (PFS) syringe 32 to be injected.
Example 3
As shown in fig. 1-6, on the basis of embodiments 1-2, the present utility model provides a technical solution: preferably, the pneumatic injection unit comprises a pressure driving rod 35 sleeved outside the rear end of the Prefilled (PFS) syringe 32, a clamping groove matched with the rear end of the trigger sleeve 21 is formed in the outer side wall of the pressure driving rod 35, the front end of the Prefilled (PFS) needle 321 is contacted with the muscle surface of a patient, the Prefilled (PFS) needle 321 is directly pressed, and the trigger sleeve 21 pushes the pressure driving rod 35 to directly puncture the front end sealing film of the compressed air source 36 under the limiting action of the limiting sleeve 22 while the Prefilled (PFS) needle 321 punctures the skin surface.
The pneumatic injection unit further comprises a compressed air source 36 arranged at the rear end of the pressure driving rod 35, compressed air is arranged in the compressed air source 36, a sealing film is arranged at the front end port of the compressed air source 36, in the embodiment, a gas cylinder is used as the compressed air source 36, compressed air is filled in the gas cylinder, the compressed air in the compressed air source 36 is used as a driving power source, the whole structure of the injector is simplified, the size of the injector is miniaturized, the injector is more stable in use, a user can easily use the injector by hands, the rear end of the compressed air source 36 is contacted with the inner surface of the rear cover 12, the sealing film at the front end of the compressed air source 36 is punctured, the compressed air in the compressed air source 36 is instantly released to push a Prefilled (PFS) rubber plug 34 in a Prefilled (PFS) syringe 32, and liquid medicament stored in the Prefilled (PFS) syringe 32 is injected into muscle of a patient through a Prefilled (PFS) needle 321, so that the injection is stably completed.
The working principle of the disposable syringe of the present utility model will be described in detail.
As shown in fig. 1-6, first, the pen cap 13 and the pre-filled (PFS) needle cap 33 are pulled out to expose the pre-filled (PFS) needle 321. Then, the hand-held pen holder sleeve 11 directly presses the front end of the Prefilled (PFS) needle 321, and when the Prefilled (PFS) needle 321 pierces the skin surface, the trigger sleeve 21 directly pierces the front end sealing film of the compressed air source 36 by pushing the pressure driving rod 35 under the limiting action of the limiting sleeve 22, so that the compressed air in the compressed air source 36 is instantaneously released to push the Prefilled (PFS) rubber plug 34 in the Prefilled (PFS) syringe 32, so that the liquid medicament stored in the Prefilled (PFS) syringe 32 is injected into the muscle of the patient through the Prefilled (PFS) needle 321.
Finally, the Prefilled (PFS) needle 321 is pulled out, the positioning sleeve 23 is matched with the compression spring 24 to push the trigger sleeve 21 to reset after the injection is completed, the snap-fit self-locking is completed, and the pen cap 13 and the Prefilled (PFS) needle cap 33 are reinstalled and then collected to wait for centralized processing.
The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims (6)

1. The disposable injector comprises an injector main body (1), wherein the injector main body (1) comprises a pen holder sleeve (11), a rear cover (12) is arranged at the rear end of the pen holder sleeve (11) in a clamping manner, a pen cap (13) is arranged at the front end of the pen holder sleeve (11), and the disposable injector is characterized in that a trigger pressing component (2) is arranged at the front end of the pen holder sleeve (11), and an air source pushing injection component (3) is arranged in the middle of the pen holder sleeve (11);
the trigger pressing assembly (2) comprises a trigger unit and a limiting unit, wherein the trigger unit is arranged at the front end of the pen holder sleeve (11), and the limiting unit is arranged outside the trigger unit; and
the air source pushing injection assembly (3) comprises a needle cylinder unit and a pneumatic injection unit, the needle cylinder unit is arranged in the middle of the pen holder sleeve (11), the pneumatic injection unit is arranged at the rear end of the needle cylinder unit, the pneumatic injection unit comprises a compressed air source (36), compressed air is arranged in the compressed air source (36), a sealing film is arranged at the front port of the compressed air source (36), and the rear end of the compressed air source (36) is in contact with the inner surface of the rear cover (12).
2. The disposable syringe according to claim 1, characterized in that the trigger unit comprises a trigger sleeve (21) sleeved at the front end of the pen holder sleeve (11), and a compression spring (24) is arranged inside the trigger sleeve (21).
3. The disposable syringe according to claim 2, wherein the limiting unit comprises a limiting sleeve (22) sleeved in the middle of the outer surface of the trigger sleeve (21), a positioning sleeve (23) is sleeved outside the limiting sleeve (22), an inner ring baffle ring of the positioning sleeve (23) is contacted with the rear end of the compression spring (24), and the outer surface of the positioning sleeve (23) is clamped with the inner surface of the front end of the pen holder sleeve (11).
4. A disposable injector according to claim 3, characterized in that the syringe unit comprises a syringe sleeve (31) with a front end contacting with the rear end of the positioning sleeve (23), a pre-filling syringe (32) is sleeved in the syringe sleeve (31), and a pre-filling needle (321) is fixedly arranged at the front end of the pre-filling syringe (32).
5. The disposable syringe according to claim 4, characterized in that the outside of the prefilled needle (321) is sleeved with a prefilled needle cap (33), the outer surface of the prefilled needle cap (33) is clamped with the inner surface of the pen cap (13), and a prefilled rubber plug (34) is slidably mounted in the middle of the inner surface of the prefilled syringe (32).
6. The disposable syringe according to claim 4, wherein the pneumatic injection unit comprises a pressure driving rod (35) sleeved outside the rear end of the pre-filled syringe (32), a clamping groove matched with the rear end of the trigger sleeve (21) is formed in the outer side wall of the pressure driving rod (35), and the compressed air source (36) is arranged at the rear end of the pressure driving rod (35).
CN202321090180.8U 2023-05-09 2023-05-09 Disposable syringe Active CN219700695U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321090180.8U CN219700695U (en) 2023-05-09 2023-05-09 Disposable syringe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321090180.8U CN219700695U (en) 2023-05-09 2023-05-09 Disposable syringe

Publications (1)

Publication Number Publication Date
CN219700695U true CN219700695U (en) 2023-09-19

Family

ID=88001544

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321090180.8U Active CN219700695U (en) 2023-05-09 2023-05-09 Disposable syringe

Country Status (1)

Country Link
CN (1) CN219700695U (en)

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Date Code Title Description
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20240429

Address after: Room 201, 2nd Floor, Building 1, No. 1387, East Section of Sunshine Avenue, Dipu Street, Anji County, Huzhou City, Zhejiang Province, 313000

Patentee after: Zhejiang Senmai Hechuang Medical Technology Co.,Ltd.

Country or region after: China

Address before: 314100 5 / F, building 6, 5 / F, building 8, No. 313, Lingxiu Road, Luoxing street, Jiashan County, Jiaxing City, Zhejiang Province

Patentee before: Jiaxing Senmai Medical Technology Co.,Ltd.

Country or region before: China