Needle cylinder of high-pressure injector
By introducing a flexible septum and a rotating snap-fit structure into the high-pressure injector syringe, the problem of dust and bacterial contamination of the plunger is solved, ensuring the sterility of the drug and liquid, achieving a fast and stable connection, and improving the safety of use.
Patent Information
- Application Number
- CN202422655444.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-10-30
AI Technical Summary
During use, dust and bacteria inside the plunger housing of existing high-pressure injectors may come into contact with the inner wall of the syringe through the plunger, leading to contamination of contrast agents and saline solution, thus affecting the safety of use.
A high-pressure injector syringe was designed, which uses a flexible spacer to separate the piston and push rod. The syringe body is connected to the high-pressure injector host by a rotation snap-fit method. The cooperation of the flexible spacer and the guide groove ensures that dust and bacteria do not come into contact with the inner wall of the syringe. Combined with the positioning groove, it prevents the syringe from falling off, so as to achieve quick assembly and disassembly and a stable connection.
It effectively prevents dust and bacteria from contaminating contrast agents and saline solution, ensuring safe use, achieving a fast and stable connection, and avoiding the risk of infection.
Smart Images
Figure CN223641113U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high pressure injector field especially relates to a high pressure injector needle cylinder. BACKGROUND
[0002] High pressure injector is widely used in clinical cardiovascular angiography examination, CT enhanced angiography scanning and MR enhanced scanning examination and treatment, and its main role is to inject contrast medium or physiological saline into human body.
[0003] However, although the needle cylinder and the piston are disposable consumables, the surface of which can be prevented from sticking dust or bacteria by a packaging bag before use, the push rod is not a disposable consumable. Although the push rod can be retracted into the shell of the high pressure injector when not in use, there will be a lot of dust and bacteria in the shell of the high pressure injector when it is exposed to the outside for a long time. When the push rod with dust and bacteria attached is inserted into the needle cylinder and connected with the piston, the dust and bacteria will also stick to the inner wall of the needle cylinder. With the movement of the piston, the dust and bacteria will have the risk of contacting the contrast medium and physiological saline, which cannot ensure the safety of use. SUMMARY
[0004] The utility model discloses a high pressure injector needle cylinder, which can ensure that the inner wall of the needle cylinder body is used in a sterile environment and avoid the contact of contrast medium and physiological saline with dust or bacteria.
[0005] To achieve the above-mentioned purpose, the utility model provides a high pressure injector needle cylinder, which comprises a needle cylinder body, a piston in sliding cooperation with the needle cylinder body, a first connecting part on the top surface of the piston for detachable connection with one end of a push rod of a high pressure injector main machine, a second connecting part on one end of the needle cylinder body for detachable connection with a needle cylinder connecting part of the high pressure injector main machine, and a flexible sleeve in the shape of a cylinder, the open edge of one end of the flexible sleeve being connected with the piston outlet on one end of the needle cylinder body, the open edge of the other end of the flexible sleeve being connected with the top surface of the piston, and the first connecting part being located on the inner side of the flexible sleeve.
[0006] As a further improvement of the utility model, the flexible sleeve is a telescopic folding plastic sleeve.
[0007] As a further improvement of the utility model, the first connecting part is a first rotary clamping part, which comprises a first shaft body, one end of the first shaft body being fixedly connected with the top surface of the piston and coaxially arranged with the piston, and at least two first clamping blocks, each first clamping block being arranged around the outer wall of the first shaft body.
[0008] As a further improvement of the utility model, the second connecting part is a second rotating clamping part, which comprises at least two second clamping blocks, and each second clamping block is arranged around the outer wall of the needle cylinder body.
[0009] As a further improvement of the utility model, a guide strip is arranged on the inner wall of the needle cylinder body, the guide strip protrudes from the inner wall of the needle cylinder body, the length direction of the guide strip is parallel to the axial direction of the needle cylinder body, the connection between the inner wall of the needle cylinder body and the guide strip is smoothly transitioned, and a guide groove is arranged on the outer side wall of the piston and is in sliding fit with the guide strip.
[0010] As a further improvement of the utility model, a positioning groove is arranged on the second clamping block, and the positioning groove is in clamping fit with the positioning structure arranged in the needle cylinder connecting part of the high-pressure injector main machine.
[0011] Advantages
[0012] Compared with the prior art, the high-pressure injector needle cylinder has the following advantages:
[0013] 1. After the needle cylinder body and the needle cylinder connecting part of the high-pressure injector main machine are connected and the piston and the push rod of the high-pressure injector main machine are connected, the flexible spacer is arranged between the needle cylinder body and the piston, even if dust and bacteria remain on the push rod, the dust and bacteria will not contact the inner wall of the needle cylinder body, and will not contact the contrast medium and physiological saline, so that the problem that infection is prone to occur when the contrast medium and physiological saline are injected into the patient is avoided.
[0014] 2. The piston and the push rod and the needle cylinder body and the needle cylinder connecting part of the high-pressure injector main machine are in rotating clamping fit, and can be quickly assembled and disassembled.
[0015] 3. In the process of rotating clamping of the piston and the push rod, in order to avoid the problem that the piston rotates relative to the needle cylinder body and causes the rotating clamping of the piston and the push rod to fail, the cooperation of the guide strip and the guide groove prevents the piston from rotating relative to the needle cylinder body.
[0016] 4. After the needle cylinder body and the needle cylinder connecting part of the high-pressure injector main machine are in rotating clamping fit, the positioning groove of the second clamping block of the needle cylinder body is in clamping fit with the positioning structure arranged in the needle cylinder connecting part of the high-pressure injector main machine, so that the needle cylinder body is prevented from being accidentally detached and the stability of the rotating connection is ensured.
[0017] The utility model will become more clear through the following description and in combination with the drawings, and the drawings are used to explain the embodiments of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0019] Figure 1 Figure 1 is a sectional view of the high-pressure syringe needle cylinder mounted on the high-pressure syringe main machine;
[0020] Figure 2 Figure 2 is another sectional view of the high-pressure syringe needle cylinder mounted on the high-pressure syringe main machine;
[0021] Figure 3 Figure 3 is a side sectional view of the high-pressure syringe main machine;
[0022] Figure 4 Figure 4 is a sectional view of the high-pressure syringe needle cylinder;
[0023] Figure 5 Figure 5 is a bottom view of the high-pressure syringe main machine;
[0024] Figure 6 Figure 6 is a top view of the high-pressure syringe needle cylinder without the flexible spacer sleeve;
[0025] Figure 7 Figure 7 is a top view of the piston and the first connecting part. DETAILED DESCRIPTION
[0026] The embodiments of the present application will now be described with reference to the accompanying drawings.
[0027] EMBODIMENT
[0028] As shown in the specific embodiment of the present application, Figures 1 to 7 a high-pressure syringe needle cylinder, comprising a needle cylinder body 1, a piston 2 in sliding cooperation with the needle cylinder body 1, a first connecting part provided on the top surface of the piston 2 and detachably connected with one end of a push rod 5 of a high-pressure syringe main machine. One end of the needle cylinder body 1 is provided with a second connecting part detachably connected with a needle cylinder connecting part 7 of the high-pressure syringe main machine. Further comprising a flexible spacer sleeve 3 in the shape of a cylinder, one end of the flexible spacer sleeve 3 is connected with the piston outlet of one end of the needle cylinder body 1, the other end of the flexible spacer sleeve 3 is connected with the top surface of the piston 2, and the first connecting part is located on the inner side of the flexible spacer sleeve 3.
[0029] The flexible sleeve 3 is a flexible and foldable plastic sleeve, which can be made of transparent plastic film. The needle cylinder body 1 is also made of transparent material. When the high-pressure injector needle cylinder is installed on the high-pressure injector, the relative positions of the first rotating clamping part 4 and the piston connecting part 6 can be clearly seen through the needle cylinder body 1 and the flexible sleeve 3. Since the flexible sleeve 3 is flexible, the middle outer wall is not connected to the inner wall of the needle cylinder body 1. When the piston 2 moves in the needle cylinder body 1, the space formed by the inner wall of the needle cylinder body 1, the top surface of the piston 2, and the outer side of the flexible sleeve 3 can be ensured to be basically the same under the action of the flexible sleeve 3, so as to avoid the flexible sleeve 3 being broken due to excessive air pressure in the space. In addition, a small air hole can be arranged on the flexible sleeve 3, which can ensure that the internal and external air pressures are the same, and can also reduce the risk of dust and bacteria passing through the air hole and contacting the inner wall of the needle cylinder body 1.
[0030] The first connecting part is the first rotating clamping part 4, which includes a first shaft body 41. One end of the first shaft body 41 is fixedly connected to the top surface of the piston 2 and arranged on the same axis. The first rotating clamping part 4 further includes at least two first clamping blocks 42, each of which is arranged around the outer wall of the first shaft body 41.
[0031] The second connecting part is the second rotating clamping part, which includes at least two second clamping blocks 12, each of which is arranged around the outer wall of the needle cylinder body 1.
[0032] The inner wall of the needle cylinder body 1 is provided with a guide strip 11 which protrudes from the inner wall of the needle cylinder body 1. The length direction of the guide strip 11 is parallel to the axial direction of the needle cylinder body 1. The connection between the inner wall of the needle cylinder body 1 and the guide strip 11 is smoothly transitioned. The outer side wall of the piston 2 is provided with a guide groove 21 which is in sliding fit with the guide strip 11.
[0033] The second clamping block 12 is provided with a positioning groove 13 which is in clamping fit with the positioning structure 8 arranged in the needle cylinder connecting part 7 of the high-pressure injector main machine.
[0034] In this embodiment, the high-pressure injector main machine includes a housing 9 and a push rod 5. One end of the housing 9 is provided with a needle cylinder connecting part 7. One end of the push rod 5 passes through the middle of the needle cylinder connecting part 7 to the outside of the housing 9. The other end of the push rod 5 is connected with a push rod telescopic driving device (not shown in the figure).
[0035] One end of the push rod 5 is provided with a piston connecting part 6. The piston connecting part 6 includes a piston connecting part body 61 provided with a first inner cavity 64. The lower middle part of the piston connecting part body 61 is provided with a first shaft hole 62 which is in communication with the first inner cavity 64. The diameter of the first shaft hole 62 is smaller than the diameter of the first inner cavity 64. The lower end of the piston connecting part body 61 is further provided with a first notch 63 which is in communication with the outer side of the first shaft hole 62. The number of the first notches 63 corresponds to the number of the first clamping blocks 42, and the shapes of the first notches 63 are matched with the shapes of the first clamping blocks 42.
[0036] The needle cylinder connecting part 7 comprises a needle cylinder connecting part body 71 provided with a second inner cavity 74, a second shaft hole 72 in communication with the second inner cavity 74 is arranged at the middle of the lower end of the needle cylinder connecting part body 71, the diameter of the second shaft hole 72 is smaller than that of the second inner cavity 74, and a second notch 73 in communication with the outside of the second shaft hole 72 is further arranged at the lower end of the needle cylinder connecting part body 71, the number of the second notches 73 corresponds to that of the second clamping blocks 12 and the shapes of the two are matched.
[0037] The positioning structure 8 comprises a steel ball 82 and a spring 81 connected with each other, one end of the spring 81 is fixed on the needle cylinder connecting part body 71, and the steel ball 82 protrudes from the inner wall of the second inner cavity 74. When the second clamping block 12 is rotated to the position in the second inner cavity 74, the steel ball 82 is clamped into the positioning groove 13 of the second clamping block 12, so that the positioning is realized. When it is needed to remove the needle cylinder body 1, the needle cylinder body 1 is reversely rotated, the positioning groove 13 generates a pushing force on the steel ball 82, so that the steel ball 82 overcomes the elastic force of the spring 81 and is separated from the positioning groove 13, and the positioning is released.
[0038] When it is needed to install the high-pressure injector needle cylinder on the high-pressure injector main machine, the push rod 5 is first extended by the push rod telescopic driving device, the needle cylinder body 1 is sleeved on the outside, the first clamping block 42 and the first shaft body 41 on the piston 2 pass through the first notch 63 and the first shaft hole 62 on the piston connecting part body 61 respectively, and the one end of the needle cylinder body 1 and the second clamping block 12 pass through the second shaft hole 72 and the second notch 73 on the needle cylinder connecting part body 71 respectively. Then, the needle cylinder body 1 is rotated relative to the needle cylinder connecting part body 71, so that the rotary clamping between the piston 2 and the push rod 5 and between the needle cylinder body 1 and the needle cylinder connecting part body 71 is completed. At this time, the piston 2 is driven to move in the needle cylinder body 1 by the push rod telescopic driving device, so that the extraction and injection of the contrast agent and the physiological saline are realized.
[0039] After the needle cylinder body 1 is connected with the needle cylinder connecting part of the high-pressure injector main machine and the piston 2 is connected with the push rod 5 of the high-pressure injector main machine, since the flexible spacer 3 is arranged between the needle cylinder body 1 and the piston 2, even if dust and bacteria remain on the push rod 5, the dust and the bacteria will not contact the inner wall of the needle cylinder body 1, and will not contact the contrast agent and the physiological saline, so that the problem that the patient is easily infected when the contrast agent and the physiological saline are injected is avoided.
[0040] The utility model has been described above in combination with the best embodiment, but the utility model is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations and the like according to the essence of the utility model.
Claims
1. A high pressure syringe barrel comprising a barrel body (1), characterized in that, The needle cylinder body (1) is provided with a piston (2) in sliding cooperation with the needle cylinder body (1), the top surface of the piston (2) is provided with a first connecting part detachably connected with one end of a push rod (5) of a high-pressure injector main machine; one end of the needle cylinder body (1) is provided with a second connecting part detachably connected with a needle cylinder connecting part (7) of the high-pressure injector main machine; further comprising a flexible sleeve (3) in a cylindrical shape, one end of the flexible sleeve (3) is connected with the piston outlet of one end of the needle cylinder body (1), the other end of the flexible sleeve (3) is connected with the top surface of the piston (2), and the first connecting part is located on the inner side of the flexible sleeve (3).
2. A high pressure syringe barrel according to claim 1, wherein The flexible sleeve (3) is a telescopic folding plastic sleeve.
3. A high pressure syringe barrel according to claim 1 or 2, wherein The first connecting part is a first rotary clamping part (4) comprising a first shaft body (41), one end of the first shaft body (41) is fixedly connected with the top surface of the piston (2) and coaxially arranged with the piston (2); the first rotary clamping part (4) further comprises at least two first clamping blocks (42), each first clamping block (42) is arranged around the outer wall of the first shaft body (41).
4. A high pressure syringe barrel according to claim 3, wherein The second connecting part is a second rotary clamping part comprising at least two second clamping blocks (12), each second clamping block (12) is arranged around the outer wall of the needle cylinder body (1).
5. A high pressure syringe barrel according to claim 3, wherein The inner wall of the needle cylinder body (1) is provided with a guide strip (11) protruding from the inner wall of the needle cylinder body (1), the length direction of the guide strip (11) is parallel to the axial direction of the needle cylinder body (1); the connection between the inner wall of the needle cylinder body (1) and the guide strip (11) is smoothly transitioned; the outer side wall of the piston (2) is provided with a guide groove (21), the guide groove (21) and the guide strip (11) are in sliding cooperation.
6. A high pressure syringe barrel according to claim 4, wherein The second clamping block (12) is provided with a positioning groove (13), the positioning groove (13) is in clamping cooperation with a positioning structure (8) arranged in the needle cylinder connecting part (7) of the high-pressure injector main machine.