Needle cylinder and syringe

Abstract

The utility model discloses a needle cylinder and an injector. The needle cylinder comprises a main cylinder body, the male connector is arranged at one end of the main cylinder body and used for being connected with a pipeline; the liquid outlet cylinder is installed at the end, close to the male connector, of the main cylinder body, and the liquid outlet cylinder communicates with the main cylinder body; wherein the outer side wall of the liquid outlet cylinder is arranged in a taper mode, the diameter of the liquid outlet cylinder is reduced in the direction away from the main cylinder body, and a notch is inwards formed in the conical surface of the liquid outlet cylinder. According to the technical scheme, the problems that the contact area of an existing needle cylinder and a female connector is large, taper deformation is prone to occurring, and liquid leakage occurs in the using process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a syringe and a injector. Background Art

[0002] When the existing syringe is connected to an external pipe such as a needle, the tapered connecting section of the syringe is inserted into the female connector of the needle to maintain the connection between the syringe and the needle, thereby forming a sealed injection channel. However, when the syringe is tightened with the female connector, the tapered connecting section extends into the interior of the female connector, and its outer surface is completely in contact with the inner surface of the female connector. The large contact surface area leads to excessive friction, abnormal noise, and easy deformation of the tapered section, which may cause leakage during use. Utility Model Content

[0003] The main purpose of the utility model is to provide a syringe and a syringe, aiming to solve the problems that the existing syringe has a large contact area with the female connector, is prone to taper deformation, and leaks during use.

[0004] To achieve the above-mentioned purpose, the utility model proposes a syringe, which includes: a main cylinder body; a male connector, which is arranged at one end of the main cylinder body and is used to connect a pipeline; and a liquid outlet cylinder, which is installed at one end of the main cylinder body close to the male connector, and is connected to the main cylinder body; wherein the outer wall of the liquid outlet cylinder is tapered, the diameter of the liquid outlet cylinder is reduced in the direction away from the main cylinder body, and the conical surface of the liquid outlet cylinder is provided with a notch inwardly.

[0005] In an embodiment of the present invention, the notch is arranged around the circumference of the liquid discharge cylinder.

[0006] In one embodiment of the utility model, the notch is opened along the small diameter end of the liquid discharge cylinder toward the large diameter end in a vertical direction, and the notch is in a truncated cone shape.

[0007] In an embodiment of the utility model, two notches are provided, and the two notches are arranged at intervals along the height direction of the liquid discharge cylinder.

[0008] In one embodiment of the utility model, the taper of the liquid outlet cylinder is 1:600.

[0009] In an embodiment of the present invention, the end surface of the main cylinder body close to the liquid discharge cylinder is tapered.

[0010] In one embodiment of the utility model, the liquid discharge cylinder is arranged inside the male joint, the inner side wall of the male joint and the outer side wall of the liquid discharge cylinder are arranged at intervals, and an installation space is formed between the male joint and the liquid discharge cylinder.

[0011] The utility model also provides a syringe, which includes a push rod, a piston and a syringe as described above, wherein the push rod extends into the syringe from an opening of one end of the syringe away from the liquid outlet cylinder, the piston is arranged inside the syringe, one end of the piston is connected to the push rod, and the piston abuts against the inner wall of the syringe.

[0012] In an embodiment of the present invention, the syringe further comprises a needle, the needle is connected to the male connector, and the needle is communicated with the liquid outlet cylinder.

[0013] In one embodiment of the utility model, the needle includes a female connector and a needle body that are relatively arranged, the female connector is connected to the male connector, the liquid outlet cylinder partially extends into the female connector and abuts against the inner wall of the female connector, and the needle body is connected to the main cylinder.

[0014] Compared with the prior art, the syringe and the injector provided by the utility model have the following beneficial effects:

[0015] The technical solution of the utility model can reduce the contact area between the two and the inner wall of the external pipeline by providing a notch on the conical surface of the liquid discharge tube when the liquid discharge tube is connected with other pipelines, thereby reducing the friction between the outer wall of the liquid discharge tube and the inner wall of the external pipeline and avoiding abnormal noise; and by reducing the contact area, deformation of the taper of the liquid discharge tube and leakage of liquid can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of an embodiment of a syringe of the utility model;

[0018] Figure 2 This is the second structural schematic diagram of an embodiment of the syringe of the utility model;

[0019] Figure 3 A top view of an embodiment of a syringe of the utility model;

[0020] Figure 4 for Figure 3 Sectional view along AA direction;

[0021] Figure 5 for Figure 4 The enlarged schematic diagram of point a in the middle;

[0022] Figure 6 This is a schematic diagram of the matching structure of a syringe and a female connector according to an embodiment of the utility model;

[0023] Figure 7 This is an exploded schematic diagram of an embodiment of a syringe and a female connector of the utility model;

[0024] Figure 8 It is a top view of an embodiment of a syringe and a female connector of the utility model;

[0025] Fig. 9 for Figure 8 The cross-sectional view along the BB direction;

[0026] Fig.10 for Fig. 9 Enlarged schematic diagram of point b in the middle.

[0027] Description of Figure Numbers:

[0028] Syringe 100; main cylinder 1; injection channel 11; male connector 2; installation space 21; liquid outlet 3; missing groove 31; liquid outlet 32; female connector 210;

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] Please refer to Figures 1 to 10 The utility model proposes a syringe 100, which includes: a main cylinder body 1; a male connector 2, which is arranged at one end of the main cylinder body 1 and is used to connect a pipeline; and a liquid outlet cylinder 3, which is installed at one end of the main cylinder body 1 close to the male connector 2, and is connected to the main cylinder body 1; wherein the outer wall of the liquid outlet cylinder 3 is tapered, and the diameter of the liquid outlet cylinder 3 is reduced in the direction away from the main cylinder body 1, and the conical surface of the liquid outlet cylinder 3 is provided with a notch 31 inwardly.

[0034] Specifically, the syringe 100 includes a main cylinder body 1, a male connector 2 and a liquid outlet cylinder 3. The main cylinder body 1 is used to accommodate liquid medicine. The male connector 2 is connected to the main cylinder body 1. The male connector 2 is used to connect other pipelines. The liquid outlet cylinder 3 is connected to the main cylinder body 1 and is used for discharging liquid from the main cylinder body 1. The liquid outlet cylinder 3 has a liquid outlet 32.

[0035] The liquid discharge cylinder 3 is installed at one end of the main cylinder body 1 close to the male connector 2. The side wall of the liquid discharge cylinder 3 is tapered to facilitate connection with other external pipelines. It can also provide guidance and positioning for the connection between the syringe 100 and other pipelines.

[0036] like Figure 5 The direction of the conical surface is reduced in the direction away from the main cylinder body 1, so that when cooperating with other pipelines, more pipelines can be adapted through the conical surface, and the sealing with other pipelines is completed. By setting the taper, the liquid discharge cylinder 3 can be sealed with other pipelines to form a liquid injection channel 11. Other pipelines can be needles, extension tubes, etc., which can be selected according to actual needs.

[0037] The tapered outer wall of the liquid discharge cylinder 3, that is, the tapered surface of the liquid discharge cylinder 3, has a notch 31 inwardly opened on the tapered surface. When the liquid discharge cylinder 3 is connected to an external pipeline, the tapered surface contacts the inner wall of the external pipeline and is sealed. The notch 31 can reduce the contact area between the two, reduce the friction between the outer wall of the liquid discharge cylinder 3 and the inner wall of the external pipeline, avoid abnormal noise, and at the same time, avoid tapered deformation of the liquid discharge cylinder 3 and leakage, making it more convenient and reliable to use.

[0038] The technical solution of the utility model can reduce the contact area between the two and the inner wall of the external pipeline by providing a notch 31 on the conical surface of the liquid discharge tube 3 when the liquid discharge tube 3 is connected with other pipelines, thereby reducing the friction between the outer wall of the liquid discharge tube 3 and the inner wall of the external pipeline and avoiding abnormal noise, and can avoid deformation of the taper of the liquid discharge tube 3 and leakage of liquid by reducing the contact area.

[0039] It should be noted that the attached Figures 1 to 10 The cylinder in the figure is a cutaway portion of the cylinder near the liquid outlet cylinder 3 and is not fully displayed.

[0040] In an embodiment of the present invention, the notch 31 is disposed around the circumference of the liquid discharge cylinder 3 .

[0041] In detail, the notch 31 is arranged around the circumference of the liquid discharge cylinder 3 to form an annular notch 31, and the notch 31 is opened in an annular shape along the circumference of the liquid discharge cylinder 3. This arrangement can greatly reduce the contact area between the liquid discharge cylinder 3 and other pipelines when the liquid discharge cylinder 3 is connected and sealed with other pipelines, thereby reducing friction and making it more convenient to use.

[0042] In an embodiment of the present invention, the notch 31 is in the shape of a truncated cone.

[0043] It is worth noting that the shape of the notch 31 can be set according to actual needs, such as Figure 1 , Figure 5 and Fig.10 In one embodiment, the notch 31 is configured to be a truncated cone cylinder, and the notch 31 is opened along the height direction of the outer wall of the cylinder and is opened to a certain depth inside the cylinder.

[0044] In an embodiment of the utility model, two notches 31 are provided, and the two notches 31 are arranged at intervals along the height direction of the liquid discharge cylinder 3 .

[0045] It should be understood that by providing two notches 31, when the liquid discharge cylinder 3 is connected to different pipelines and different positions of the conical surface of the liquid discharge cylinder 3 are needed, the conical surface can be sealed with other pipelines, and the contact area between the two is reduced, making the liquid discharge cylinder 3 more practical.

[0046] In one embodiment, two notches 31 are arranged in the middle of the conical surface of the liquid discharge cylinder 3. The two notches 31 divide the conical surface of the liquid discharge cylinder 3 into three sealing surfaces, so that the liquid discharge cylinder 3 can be better connected to other pipelines and sealed with other pipelines through the sealing surface.

[0047] In an embodiment of the present utility model, the taper of the liquid outlet cylinder 3 is 1:600.

[0048] It is worth noting that the taper of the liquid discharge tube 3 is 1:600, which can be adapted to most pipes. The taper of the liquid discharge tube 3 can facilitate disassembly and positioning with other pipes, and is used for static fit for precise positioning. Since the taper is very small, a certain torque can be transmitted by utilizing the principle of friction.

[0049] In an embodiment of the present invention, the end surface of the main cylinder body 1 close to the liquid outlet cylinder 3 is tapered.

[0050] It should be understood that the end surface of the main cylinder 1 near the liquid outlet cylinder 3 is also tapered to facilitate the diversion of the liquid in the main cylinder 1 to the position of the liquid outlet cylinder 3 to facilitate the discharge of liquid from the liquid outlet cylinder 3.

[0051] In one embodiment of the utility model, the liquid discharge cylinder 3 is arranged inside the male connector 2, the inner wall of the male connector 2 and the outer wall of the liquid discharge cylinder 3 are arranged at intervals, and an installation space 21 is formed between the male connector 2 and the liquid discharge cylinder 3.

[0052] In detail, Figure 1 The liquid discharge cylinder 3 is arranged inside the male connector 2, and the inner wall of the male connector 2 is spaced apart from the outer wall of the liquid discharge cylinder 3 to form an installation space 21 for connecting other pipelines. The pipeline can extend into the installation space 21, and the inner wall of the pipeline abuts and seals against the conical surface of the liquid discharge cylinder 3, and the interior of the pipeline is connected with the interior of the liquid discharge cylinder 3 to form the entire injection channel 11.

[0053] The inner wall of the male connector 2 may be provided with a connection structure such as a buckle or an internal thread, that is, other pipes and the main cylinder body 1 may be connected by threads, buckles, or plugs, and the connection method between the pipe and the male connector 2 is not limited here. By providing the male connector 2, the connection with other pipes is facilitated, and by providing the installation space 21, the stability of the connection between the syringe 100 and other pipes is improved.

[0054] The utility model also provides a syringe (not shown in the figure), which includes a push rod (not shown in the figure), a piston (not shown in the figure) and the syringe 100 as described above, wherein the push rod extends into the syringe 100 from an opening at one end of the syringe 100 away from the liquid outlet cylinder 3, the piston is arranged inside the syringe 100, one end of the piston is connected to the push rod, and the piston abuts against the inner wall of the syringe 100.

[0055] Specifically, the syringe includes a push rod, a piston and a syringe 100. The push rod and the piston are both arranged inside the syringe 100. The piston is slidably arranged inside the syringe 100 and abuts against the inner wall of the syringe 100. One end of the push rod is connected to the piston. By pushing the push rod to drive the piston to slide inside the syringe 100, the liquid in the syringe 100 is pushed out or the external liquid is drawn back into the syringe 100. By providing the piston and the push rod, the injection efficiency of the syringe can be improved.

[0056] In an embodiment of the present invention, the syringe further comprises a needle, the needle is connected to the male connector 2 , and the needle is communicated with the liquid outlet cylinder 3 .

[0057] In detail, the syringe 100, the liquid outlet cylinder 3 and the needle (not shown) constitute the injection channel 11, and the liquid is driven by pushing the push rod and / or the piston so that the liquid medicine can be sucked into the syringe 100 through the needle or the liquid medicine in the syringe 100 can be injected through the needle.

[0058] In one embodiment of the utility model, the needle includes a female connector 210 and a needle body (not shown) arranged relatively to each other, the female connector 210 is connected to the male connector 2, the liquid outlet tube 3 partially extends into the female connector 210 and abuts against the inner wall of the female connector 210, and the needle body is connected to the main cylinder 1.

[0059] It is worth noting that the male connector 2 is connected to the female connector 210 to facilitate the fixing of the needle body and facilitate the sealed communication between the liquid discharge cylinder 3 and the needle. There are many ways to connect the male connector 2 and the female connector 210, which can be one or more of a threaded connection, a snap connection or a plug-in fit. In one embodiment, Figure 7 and Fig. 9 The male connector 2 is threadedly connected to the female connector 210 for easy assembly and disassembly.

[0060] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A syringe, characterized in that: The syringe comprises: Main cylinder; a male connector, which is provided at one end of the main cylinder and is used for connecting a pipeline; and A liquid discharge cylinder, which is mounted on one end of the main cylinder body close to the male connector and is in communication with the main cylinder body; The outer side wall of the liquid discharge cylinder is tapered, the diameter of the liquid discharge cylinder decreases in the direction away from the main cylinder body, and the conical surface of the liquid discharge cylinder is provided with a notch inwardly.

2. The syringe according to claim 1, wherein The notch is arranged around the circumference of the liquid discharge cylinder.

3. The syringe according to claim 2, wherein: The notch is in the shape of a truncated cone.

4. The syringe according to claim 2, wherein: There are two notches, which are spaced apart along the height direction of the liquid discharge cylinder.

5. The syringe according to claim 1, wherein: The taper of the liquid discharge cylinder is 1:

600.

6. The syringe according to claim 1, wherein: The end surface of the main cylinder body close to the liquid discharge cylinder is tapered.

7. The syringe according to claim 1, wherein: The liquid discharge cylinder is arranged inside the male joint, the inner side wall of the male joint and the outer side wall of the liquid discharge cylinder are spaced apart, and an installation space is formed between the male joint and the liquid discharge cylinder.

8. A syringe, characterized in that: The syringe comprises a push rod, a piston and a syringe as claimed in any one of claims 1 to 7, wherein the push rod extends into the syringe through an opening at one end of the syringe away from the liquid outlet cylinder. The piston is arranged inside the syringe, one end of the piston is connected to the push rod, and the piston abuts against the inner wall of the syringe.

9. The syringe according to claim 8, wherein The syringe further comprises a needle, which is connected to the male connector and communicates with the liquid outlet cylinder.

10. The syringe according to claim 9, wherein The needle includes a female connector and a needle body that are relatively arranged. The female connector is connected to the male connector. The liquid discharge cylinder partially extends into the female connector and abuts against the inner wall of the female connector. The needle body is connected to the main cylinder.

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