High-pressure injector

Abstract

The utility model discloses a high-pressure injector which comprises a needle cylinder. The piston is arranged in the needle cylinder; the assembly rod is connected with the piston; an assembling groove is formed in the side, close to an opening of the needle cylinder, of the piston, a containing groove is formed in the side wall of the assembling groove, and a notch is formed in the face, away from the bottom face of the assembling groove, of the containing groove. A mounting plate is arranged at one end of the assembly rod and clamped in the containing groove. The mounting plate is limited by the side wall of the accommodating groove, so that the mounting plate cannot be pulled out of the assembling groove, the mounting plate is limited by the accommodating groove, so that the mounting plate cannot rotate in at least one direction, the mounting stability of the piston and the assembling rod is improved, and the stability of the high-pressure injector is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure injectors, in particular to a high-pressure injector. Background Art

[0002] High-pressure syringes are mainly used to inject liquids such as contrast agents and saline into the human body to enhance the effect of medical imaging, and have gradually become one of the important devices in medical equipment. High-pressure syringes include a syringe, a piston, and an assembly rod, etc. The piston is arranged in the syringe, and the assembly rod is assembled with the piston to push the piston to move in the syringe. In the existing equipment, the assembly rod and the piston are assembled in such a way that the piston has an assembly groove, the assembly rod is placed in the assembly groove, and abuts against the bottom of the assembly groove to push the piston to move. This assembly method makes it easy for the assembly rod to rotate in the assembly groove, resulting in unstable assembly and reducing the stability of the high-pressure syringe when in use. Utility Model Content

[0003] The main purpose of the utility model is to provide a high-pressure injector, aiming to solve the problem of low stability of the assembly rod and the piston of the existing high-pressure injector.

[0004] To achieve the above-mentioned purpose, the utility model proposes a high-pressure syringe, comprising: a syringe; a piston, the piston is arranged in the syringe; an assembly rod, the assembly rod is connected to the piston; wherein, the piston is provided with an assembly groove on the side close to the opening of the syringe, the side wall of the assembly groove is provided with a receiving groove, and the receiving groove is provided with a notch on the side away from the bottom surface of the assembly groove; a mounting plate is provided at one end of the assembly rod, and the mounting plate is clamped in the receiving groove.

[0005] Preferably, the mounting plate is protruding from the side wall of the assembly rod, the width of the mounting plate is smaller than the width of the notch, and the thickness of the mounting plate matches the accommodating groove.

[0006] Preferably, a bottom wall of the accommodating groove facing away from the assembly groove is defined as a reference surface, and a distance between the reference surface at an end close to the notch and the bottom surface of the assembly groove is greater than a distance between the reference surface at an end facing away from the notch and the bottom surface of the assembly groove.

[0007] Preferably, the reference surface is provided with an elastic protrusion at one end close to the notch.

[0008] Preferably, the mounting plate abuts against the side wall of the accommodating groove and the elastic protrusion.

[0009] Preferably, a surface of the elastic protrusion facing away from the reference surface is configured to be arc-shaped.

[0010] Preferably, a plurality of the accommodating grooves are provided, and the distances between adjacent accommodating grooves are equal.

[0011] Preferably, an abutment column is protruding from the bottom wall of the assembly groove, and the top surface of the abutment column is flush with a side surface of the accommodating groove close to the bottom surface of the assembly groove.

[0012] Preferably, an abutment block is protrudingly provided on one side of the mounting plate close to the bottom surface of the assembly groove, and the abutment block abuts against the bottom surface of the assembly groove and / or the side surface of the assembly groove.

[0013] Preferably, the high-pressure injector further comprises a high-pressure injector body, and the high-pressure injector body is sleeved on the outside of the syringe.

[0014] Compared with the prior art, the high-pressure injector provided by the utility model has the following beneficial effects:

[0015] The high-pressure injector in the technical solution of the utility model comprises: a syringe; a piston, which is arranged in the syringe; an assembly rod, which is connected to the piston; wherein an assembly groove is provided on the piston near the opening of the syringe, a receiving groove is provided on the side wall of the assembly groove, and a notch is provided on the side of the receiving groove away from the bottom surface of the assembly groove; a mounting plate is provided at one end of the assembly rod, and the mounting plate is clamped in the receiving groove. The side wall of the receiving groove limits the mounting plate so that it cannot be pulled out of the mounting groove, and the receiving groove also limits the mounting plate so that it cannot rotate in at least one direction, thereby improving the stability of the installation of the piston and the assembly rod, and thus improving the stability of the high-pressure injector. 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 A three-dimensional structural diagram of a high-pressure injector provided in the first embodiment of the utility model

[0018] Figure 2 An explosion diagram of a high-pressure injector provided in the first embodiment of the utility model;

[0019] Figure 3 A schematic diagram of the three-dimensional structure of a syringe of a high-pressure injector provided in the first embodiment of the utility model;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the piston of the high-pressure injector provided in the first embodiment of the utility model;

[0021] Figure 5 for Figure 4The enlarged view of point A in the middle;

[0022] Figure 6 It is a schematic three-dimensional structure diagram of the assembly rod of the high-pressure injector provided in the first embodiment of the utility model.

[0023] Description of Figure Numbers:

[0024] Label name Label name 100 High pressure injector 110 Syringes 120 piston 130 Mounting rod 121 Mounting slot 122 Storage tank 123 gap 131 Mounting Plate 111 Accommodation cavity 140 Needle connection tube 1221 Reference surface 1222 Elastic bump 1223 opposite 1224 Connection surface 1225 Card space 124 Butt column 132 Abutment block 112 Card connection 113 Limiting part

[0025] 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

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See also Figure 1-Figure 6 The first embodiment of the utility model provides a high-pressure syringe 100, comprising: a syringe 110; a piston 120, the piston 120 is arranged in the syringe 110; an assembly rod 130, the assembly rod 130 is connected to the piston 120; wherein, a mounting groove 121 is provided on the piston 120 at one side close to the opening of the syringe 110, a receiving groove 122 is provided on the side wall of the mounting groove 121, and a notch 123 is provided on the bottom surface of the receiving groove 122 away from the mounting groove 121; a mounting plate 131 is provided at one end of the mounting rod 130, and the mounting plate 131 is clamped in the receiving groove 122.

[0030] It can be understood that the syringe 110 defines a receiving chamber 111, and a needle connecting tube 140 is provided at one end of the syringe 110 away from the opening of the receiving chamber 111, the piston 120 is placed in the receiving chamber 111, the assembly rod 130 penetrates into the receiving chamber 111 from the opening of the receiving chamber 111, and is connected to the piston 120, and the needle connecting tube 140 is mainly used to connect the needle to connect the needle and the syringe 110. Further, in order to facilitate the connection of the syringe 110 with other connecting tubes, the outer wall of the needle connecting tube 140 is formed with an external thread, so that the threaded connection of the syringe 110 with other connecting tubes can be achieved through the external thread.

[0031] Furthermore, the shape of the syringe 110 is not limited. In this embodiment, the syringe 110 is configured as a cylindrical structure, the piston 120 is configured as a cylindrical structure, and the side wall of the piston 120 matches the inner wall of the syringe 110; the assembly groove 121 is configured as a circular groove, the receiving groove 122 is configured as a square groove, and the bottom wall of the receiving groove 122 is configured as an arc, so that the mounting plate 131 can be snapped into the receiving groove 122.

[0032] Furthermore, one end of the mounting plate 131 away from the assembly rod 130 is arranged to correspond to the arc of the bottom wall of the accommodating groove 122 .

[0033] Furthermore, the notch 123 is opened on the side wall of the assembly groove 121 at one of the two ends of the accommodating groove 122 in the length direction. The notch 123 is opened to the opening of the assembly groove 121, saving space and facilitating the installation plate 131 to be placed in the accommodating groove 122 from the interface.

[0034] It can be understood that the connection between the assembly rod 130 and the piston 120 is that the mounting plate 131 enters the receiving groove 122 from the notch 123, and the mounting plate 131 is rotated so that the mounting plate 131 abuts against three side surfaces of the receiving groove 122. The side wall of the receiving groove 122 limits the mounting plate 131 so that it cannot be pulled out of the assembly groove 121, and the receiving groove 122 also limits the mounting plate 131 so that it cannot rotate in at least one direction, thereby improving the stability of the installation of the piston 120 and the assembly rod 130, and further improving the stability of the high-pressure injector 100.

[0035] Furthermore, the mounting plate 131 is protruded from the side wall of the assembly rod 130 , the width of the mounting plate 131 is smaller than the width of the notch 123 , and the thickness of the mounting plate 131 matches the accommodating groove 122 , thereby improving the stability of the high-pressure injector 100 .

[0036] Further, the bottom wall of the receiving groove 122 facing away from the assembly groove 121 is defined as a reference surface 1221, and the distance between the reference surface 1221 at the end close to the notch 123 and the bottom surface of the assembly groove 121 is greater than the distance between the reference surface 1221 at the end facing away from the notch 123 and the bottom surface of the assembly groove 121. In this embodiment, the receiving groove 122 is configured as a trapezoidal groove, the reference surface 1221 is tilted, and the angle between the reference surface 1221 and the side wall of the receiving groove 122 opposite to the reference surface 1221 is set to 0-5 degrees, preferably 2 degrees. This facilitates the installation plate 131 to be inserted into the receiving groove 122.

[0037] As an optional implementation, the mounting plate 131 is configured as a trapezoidal plate corresponding to the receiving groove 122 . When the mounting plate 131 is inserted into the receiving groove 122 , the plate surface of the mounting plate 131 abuts against the side surface of the receiving groove 122 .

[0038] Furthermore, the reference surface 1221 is provided with an elastic protrusion 1222 at one end near the notch 123. The side surface of the accommodating groove 122 opposite to the reference surface 1221 is defined as the opposite surface 1223, and the side of the accommodating groove 122 connected to the reference surface 1221 and the opposite surface 1223 is defined as the connecting surface 1224. The reference surface 1221, the connecting surface 1224, the opposite surface 1223 and the elastic protrusion 1222 jointly define a locking space 1225. It can be understood that when the mounting plate 131 is placed in the notch 123, the mounting plate 131 rotates and enters from the gap between the elastic protrusion 1222 and the opposite surface 1223. In the locking space 1225, the elastic protrusion 1222 is deformed to expand the distance between the elastic protrusion 1222 and the opposite surface 1223, which is convenient for the movement of the mounting plate 131. After the mounting plate 131 enters the locking space 1225, the elastic protrusion 1222 returns to its natural state. The distance between the elastic protrusion 1222 and the opposite surface 1223 is less than the thickness of the mounting plate 131. The elastic protrusion 1222 limits the mounting plate 131 so that it is always located in the locking space, thereby further improving the stability of the high-pressure syringe 100.

[0039] Furthermore, the mounting plate 131 abuts against the side wall of the receiving groove 122 and the elastic protrusion 1222. The distance between the elastic protrusion 1222 and the connecting surface 1224 is less than or equal to the length of the mounting plate 131. The length direction of the mounting plate 131 is the length direction of the receiving groove 122. When the mounting plate 131 is located in the clamping space 1225, the two ends of the mounting plate 131 in the length direction abut against the connecting surface 1224 and the elastic protrusion 1222 respectively. At this time, the elastic protrusion 1222 is in a natural state or a slightly deformed state.

[0040] Furthermore, the length of the notch 123 is less than or equal to the diameter of the assembly rod 130 , and the length direction of the notch 123 is the length direction of the accommodating groove 122 .

[0041] Furthermore, the side surface of the elastic protrusion 1222 facing away from the reference surface 1221 is set to be arc-shaped, so as to facilitate the installation plate 131 to enter the locking space 1225 and prevent the installation plate 131 from entering the locking space 1225 from the outside, and one end of the installation plate 131 in the length direction abuts against the elastic protrusion 1222, thereby bringing resistance to the movement of the installation plate 131.

[0042] It can be understood that the side surface of the elastic protrusion 1222 which is away from the reference surface 1221 is configured to be an arc shape protruding toward the opposite surface 1223 .

[0043] Furthermore, the surface of the elastic protrusion 1222 that is away from the reference surface 1221 is defined as an elastic surface, and the distance between the elastic surface at one end close to the notch 123 and the opposite surface 1223 is greater than the distance between the elastic surface at one end away from the notch 123 and the opposite surface 1223. The resistance when the mounting plate 131 is moved out of the locking space 1225 is increased, thereby improving the stability of the high-pressure injector 100.

[0044] Furthermore, a plurality of receiving grooves 122 are provided, and the distances between adjacent receiving grooves 122 are equal. It should be noted that all receiving grooves 122 are of the same size, and the opposite surfaces 1223 on all receiving grooves 122 are coplanar and parallel to the bottom surface of the assembly groove 121, so that when the assembly rod 130 is connected to the piston 120, the axis of the assembly rod 130 is colinear with the axis of the piston 120. The notches 123 are all opened at the same end of the length direction of the receiving grooves 122. The number of receiving grooves 122, notches 123, and mounting plates 131 are all the same.

[0045] It can be understood that the distance between adjacent receiving grooves 122 refers to the distance between the side of the receiving groove 122 closest to the adjacent receiving groove 122 and the side of the adjacent receiving groove 122 closest to the receiving groove 122. The distances between adjacent receiving grooves 122 are equal, so that the mounting plates 131 in each receiving groove 122 are subjected to the same force, which is beneficial to improving the stability of the high-pressure injector 100.

[0046] It can be understood that when the number of the receiving grooves 122 is set to 2, the angle between the connecting surfaces 1224 on adjacent receiving grooves 122 is 180 degrees, when the number of the receiving grooves 122 is set to 3, the angle between the connecting surfaces 1224 on adjacent receiving grooves 122 is 120 degrees, and when the number of the receiving grooves 122 is set to 4, the angle between the connecting surfaces 1224 on adjacent receiving grooves 122 is 90 degrees. In this embodiment, the number of the receiving grooves 122 is set to 4.

[0047] Furthermore, the outer circumference of the assembly rod 130 is smaller than the inner wall of the assembly groove 121, that is, the assembly rod 130 is radially limited in the assembly groove 121, and only the mounting plate 131 abuts against the bottom wall of the accommodating groove 122, which facilitates the assembly rod 130 to be quickly installed on the piston 120, and also makes the assembly rod 130 lighter, so that the high-pressure injector 100 can be used better. As an optional embodiment, the outer circumference of the assembly rod 130 is the same as the inner wall of the assembly groove 121. When the assembly rod 130 is installed in the assembly groove 121, the inner wall of the assembly groove 121 abuts against the inner circumference of the assembly rod.

[0048] Furthermore, an abutting column 124 is convexly provided on the bottom wall of the assembly groove 121, and the top surface of the abutting column 124 is flush with a side surface of the accommodating groove 122 close to the bottom surface of the assembly groove 121. That is, the top surface of the abutting column 124 is coplanar with the opposite surface 1223, and a surface of the mounting plate 131 close to the bottom wall of the accommodating cavity 111 is coplanar with an end surface of the assembly rod 130 close to the bottom wall of the accommodating cavity 111. During installation, the abutting column 124 abuts against the assembly rod 130, and the opposite surface 1223 abuts against the mounting plate 131, further improving the stability of the high-pressure injector 100.

[0049] As an optional implementation, the mounting plate 131 and the assembly rod 130 are integrated.

[0050] Furthermore, abutment block 132 is convexly provided on one side of the bottom surface of the mounting plate 131 close to the assembly groove 121, and the abutment block 132 abuts against the bottom surface of the assembly groove 121 and / or the side surface of the assembly groove 121. That is, when the mounting plate 131 is installed in the clamping space, the abutment block 132 abuts against the bottom surface of the assembly groove 121 and / or the side surface of the assembly groove 121 at the same time. In this embodiment, the abutment block 132, the mounting plate 131 and the assembly rod 130 are all integrated, and the abutment block 132 abuts against the bottom surface of the assembly groove 121 and the side surface of the assembly groove 121 at the same time, further improving the stability of the high-pressure injector 100.

[0051] As an optional embodiment, the side of the abutment block 132 close to the axis of the assembly rod 130 abuts against the abutment column 124, that is, when the assembly rod 130 is assembled with the piston 120, the abutment block 132 abuts against the inner wall of the assembly groove 121 and the outer periphery of the abutment column 124 at the same time; or the abutment block 132 abuts against the inner wall of the assembly groove 121, the inner wall of the assembly groove 121 and the outer periphery of the abutment column 124 at the same time. The stability of the assembly rod 130 and the piston 120 is further improved. It can be understood that at this time, the side of the abutment block 132 close to the axis of the assembly rod 130 fits with the abutment column 124, and the side of the abutment block 132 close to the axis of the assembly rod 130 is set to an arc shape corresponding to the abutment column 124, so that when the mounting plate 131 is rotated into the clamping space 1225, the side of the abutment block 132 close to the axis of the assembly rod 130 can always abut against the abutment column 124.

[0052] Furthermore, the high-pressure injector 100 also includes a high-pressure injector body (not shown), which is sleeved on the outside of the syringe 110 .

[0053] Furthermore, the outer wall of the syringe 110 is provided with a clamping portion 112 and a limiting portion 113 in sequence. The clamping portion 112 is clamped to the high-pressure syringe body, and the limiting portion 113 is in contact with the side of the high-pressure syringe body facing the bottom of the accommodating cavity 111. The clamping portion 112 of the outer wall of the syringe 110 is mainly used to clamp and fix the syringe 110 with the high-pressure syringe body when the syringe 110 is installed on the high-pressure syringe body. The high-pressure syringe body can be provided with a connecting portion at a position corresponding to the clamping portion 112, and the connecting portion can be clamped with the clamping portion 112. The limiting portion 113 is mainly used to limit the high-pressure syringe body during the installation process of the syringe 110 and the high-pressure syringe body, so as to avoid an excessive installation stroke, which affects the clamping effect between the high-pressure syringe body and the clamping portion 112.

[0054] It can be understood that by the limiting portion 113 on the syringe 110 abutting against the side of the bottom of the high-pressure syringe body facing the accommodating cavity 111, the high-pressure syringe body can be limited during the installation process of the syringe 110 and the high-pressure syringe body, ensuring that the position of the syringe body on the clamping portion 112 on the syringe 110 is accurately clamped with the clamping portion 112.

[0055] In this embodiment, the snap-in portion 112 is configured as a snap-in slot, which simplifies the structure of the snap-in portion 112. The shape of the snap-in slot is not limited and may be a common structure such as a circle or a square. In this embodiment, the snap-in slot is preferably configured as a rectangular parallelepiped structure.

[0056] In some optional embodiments, the clamping portion 112 is configured as a hook.

[0057] Furthermore, the limiting portion 113 is configured as a convex plate convexly disposed on the outer wall of the syringe 110, and the convex plate abuts against the side of the high-pressure syringe body facing the bottom of the accommodating cavity 111. It can be understood that the configuration of the convex plate simplifies the structure of the limiting portion 113, reduces the cost of the high-pressure syringe 100, and improves the strength of the syringe 110. In this embodiment, the convex plate is configured in an annular shape and is disposed around the outside of the syringe 110, which can increase the abutment area of ​​the convex plate on the high-pressure syringe body and improve the limiting effect of the limiting portion 113 on the high-pressure syringe 100. In this embodiment, the convex plate is configured as a plurality of pieces, and the plurality of convex plates are evenly spaced and disposed around the outside of the syringe 110.

[0058] 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 high-pressure injector, characterized in that: include: Syringes; A piston, wherein the piston is disposed in the syringe; an assembly rod connected to the piston; Among them, an assembly groove is provided on the piston on the side close to the opening of the syringe, a receiving groove is provided on the side wall of the assembly groove, and a notch is provided on the side of the receiving groove away from the bottom surface of the assembly groove; a mounting plate is provided at one end of the assembly rod, and the mounting plate is clamped in the receiving groove.

2. The high-pressure injector according to claim 1, characterized in that: The mounting plate is protruded from the side wall of the assembly rod, the width of the mounting plate is smaller than the width of the notch, and the thickness of the mounting plate matches the accommodating groove.

3. The high-pressure injector according to claim 1, characterized in that: A bottom wall of the accommodating groove facing away from the assembly groove is defined as a reference surface, and a distance between the reference surface at an end close to the notch and the bottom surface of the assembly groove is greater than a distance between the reference surface at an end away from the notch and the bottom surface of the assembly groove.

4. The high-pressure injector according to claim 3, characterized in that: The reference surface is provided with an elastic protrusion at one end close to the notch.

5. The high-pressure injector according to claim 4, characterized in that: The mounting plate abuts against the side wall of the accommodating groove and the elastic protrusion.

6. The high-pressure injector according to claim 4, characterized in that: A surface of the elastic protrusion facing away from the reference surface is configured in an arc shape.

7. The high-pressure injector according to claim 1, characterized in that: A plurality of the containing grooves are provided, and the distances between adjacent containing grooves are equal.

8. The high-pressure injector according to claim 1, characterized in that: An abutment column is protruding from the bottom wall of the assembly groove, and the top surface of the abutment column is flush with a side surface of the accommodating groove close to the bottom surface of the assembly groove.

9. The high-pressure injector according to claim 1, characterized in that: A contact block is protrudingly provided on one side of the mounting plate near the bottom surface of the assembly groove, and the contact block contacts the bottom surface of the assembly groove and / or the side surface of the assembly groove.

10. The high-pressure injector according to any one of claims 1 to 9, characterized in that: It also includes a high-pressure syringe body, which is sleeved on the outside of the syringe.

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