Needle cylinder quick connecting device of high-pressure radiography syringe

Abstract

The invention discloses a needle cylinder quick connecting device of a high-pressure radiography syringe, which is used for connecting a needle cylinder and a needle head seat, one end of the needle cylinder is a cylinder inserting end, one end of the needle head seat is an inserting end, the inserting end is matched with the cylinder inserting end in an inserting manner, and the needle cylinder quick connecting device comprises a buckling part arranged on the needle cylinder and an elastic clamping jaw arranged on the needle head seat, the elastic clamping jaw is clamped and matched with the buckling part; the two elastic clamping jaws are connected to the outer side wall of the needle head base and are symmetrically arranged, one ends of the elastic clamping jaws are connected with the needle head base, the other ends of the elastic clamping jaws extend in the axial direction and towards the side close to the inserting end, the sides, close to the inserting end, of the elastic clamping jaws are obliquely arranged in the direction away from the needle head base, and the two ends of each elastic clamping jaw are provided with clamping parts matched with the buckling parts in a clamped mode. The reliability of connection between the needle head and the needle head base can be ensured, and meanwhile self-destruction after one-time use can be achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a quick-connect device for the syringe barrel of a high-pressure contrast injection. Background Technology

[0002] During use, high-pressure contrast injectors deliver contrast agents to the patient at a specific flow rate. The syringe and needle, as the core components that directly contact the contrast agent and withstand high pressure, are of paramount importance in terms of hygiene, safety, and connection reliability. Therefore, syringes and needles are generally designed as disposable consumables. Furthermore, to balance storage convenience and retrieval safety, the syringe and needle are designed as separate units, reassembled only during clinical use.

[0003] Currently, the connection between the syringe and needle in a split-type syringe is mainly a threaded connection, with the two secured by threaded compression to ensure a reliable connection. However, threaded connections are prone to jamming under high pressure or improper assembly, making disassembly difficult. Insufficient tightening force can lead to loosening during high-pressure injection, causing contrast agent leakage and endangering patients or medical staff. Furthermore, contrast agents can reduce the reliability and sealing of threaded connections, leading to contrast agent leakage.

[0004] In addition, to prevent staff injuries and cross-infection caused by the reuse of syringes and needles or during recycling and disposal, the industry has generally required disposable syringes to have a self-destruct function after single use. Existing self-destructing syringes usually achieve self-destruction through the breakage of fragile parts. However, this self-destruction method can easily lead to low reliability of the connection between the syringe and the needle. In contrast injection scenarios that need to withstand high pressure, the fragile parts are prone to premature breakage, leading to safety accidents.

[0005] In summary, the current connection method between the syringe and needle of a high-pressure contrast injector makes it difficult to balance self-destruction functionality and high-pressure connection reliability. Summary of the Invention

[0006] The purpose of this invention is to provide a quick connection device for the syringe barrel of a high-pressure contrast injection, which solves the problem that it is difficult to balance the self-destruct function and the high-pressure connection reliability when connecting the syringe barrel and needle of a high-pressure contrast injection.

[0007] To achieve this objective, the present invention adopts the following technical solution: A quick-connect device for a high-pressure contrast injector is provided for connecting a syringe barrel and a needle holder. One end of the syringe barrel is an insert end, and one end of the needle holder is a plug-in end. The plug-in end is plugged into the insert end. The quick-connect device includes a fastening part on the syringe barrel and an elastic claw on the needle holder. The elastic claw is engaged with the fastening part. The elastic claws are connected to the outer wall of the needle holder and are arranged symmetrically in two. One end of the claw is connected to the needle holder, and the other end extends axially towards the side closer to the insertion end. The side of the elastic claw near the insertion end is inclined away from the needle holder. Both ends of the elastic claw have a locking part that engages with the buckle.

[0008] Optionally, the latching part is a snap-fit ​​hole opened on the side wall of the syringe near the insertion end, the snap-fit ​​part is a wedge-shaped protrusion, and the snap-fit ​​parts at both ends of the elastic claw are arranged with their inclined surfaces facing away from each other.

[0009] Optionally, the insertion end of the needle holder is tapered, and the needle holder has a first channel inside, while the syringe has a tapered second channel inside, and the insertion end is inserted into the second channel.

[0010] Optionally, a tapered sealing ring is fitted on the side of the needle holder near the insertion end, and the sealing ring fits against the side wall of the second channel.

[0011] Optionally, an operating ear plate is provided on the outer side of the elastic claw, which is connected to the middle of the elastic claw via a connecting arm, and the length of the operating ear plate on the side closer to the insertion end is greater than the length on the other side.

[0012] Optionally, a support seat is provided on the outer wall of the needle holder, the support seat is located on the side of the elastic claw near the insertion end, and the side of the syringe barrel near the insertion end matches the support seat.

[0013] Optionally, the quick-connect syringe device further includes a forced self-destruction part, which is used to ensure that the syringe and the needle holder are no longer suitable for secondary use after one use and separation.

[0014] Optionally, the support base has a sliding cavity, and the forced self-destruct part includes: The self-destructing claw is embedded in the sliding cavity. The self-destructing claw is connected to a sliding plate, which is slidably disposed in the sliding cavity. The inner side of the elastic claw has a locking groove that matches the self-destructing claw. A driving component, used to drive the self-destructing claw to slide out of the sliding cavity in a direction away from the insertion end before the syringe and the needle holder are separated after one use; A limiting spring is located at the bottom of the sliding cavity on the side opposite to the insertion end. After the driving member drives the self-destructing claw to slide a maximum distance, the sliding plate abuts against the limiting spring, and at this time there is a gap between the sliding plate and the bottom of the sliding cavity.

[0015] Optionally, a sliding groove is provided on the outer wall of the support base, the sliding groove is connected to the sliding cavity, the driving member includes a connecting plate disposed in the sliding groove, the connecting plate is connected to the sliding plate, and its end protrudes from the outer wall of the support base, and a sliding stop groove is provided on the inner wall of the syringe near the insertion end, the sliding stop groove is used to accommodate the end of the connecting plate protruding from the support base.

[0016] Optionally, a first guide groove is formed on the inner sidewall of the sliding cavity, and a second guide groove is formed on the inner wall of the needle holder. The driving component includes a first magnetic block slidably disposed in the first guide groove and a second magnetic block slidably disposed in the second guide groove, and the first magnetic block and the second magnetic block attract each other.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a quick-connect device for a high-pressure contrast injector. Two symmetrically arranged elastic claws on the needle holder engage with locking positions on the syringe barrel to achieve a quick, direct insertion connection between the needle and needle holder, offering convenient and highly reliable connection. Furthermore, the elastic claws are angled and have locking portions at both ends. During injection, the insertion end is inserted into the syringe barrel, and the side of the elastic claw closest to the insertion end deforms inward, engaging the locking portion on that side with the snap-fit ​​portion, facilitating insertion and separation of the needle and needle holder. After one use, the needle holder with the needle installed is flipped and inserted into the syringe barrel. The locking portion of the elastic claw furthest from the insertion end engages with the snap-fit ​​portion, making it difficult to separate the needle and needle holder by pressing the elastic claws, thus achieving self-destruction. Therefore, this quick-connect device ensures reliable needle-needle holder connection while also enabling self-destruction after one use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1This is a schematic diagram of a quick-connect device for the syringe of a high-pressure contrast injector.

[0021] Figure 2 This is a schematic diagram of the structure after the insert end and the connector end are connected.

[0022] Figure 3 This is a schematic diagram of the plug-in terminal.

[0023] Figure 4 This is a cross-sectional view of the structure after the insert end and the plug end are plugged in, according to one embodiment.

[0024] Figure 5 for Figure 4 A magnified view of part A in the middle.

[0025] Figure 6 This is a cross-sectional view of the structure after the insert end and the plug end are connected in another embodiment.

[0026] Figure 7 for Figure 6 A magnified view of part B in the middle.

[0027] Illustration: 100, Syringe; 101, Insertion end; 102, Second channel; 200, Needle holder; 201, Insertion end; 202, First channel; 203, Support base; 300, Syringe quick connection device; 1, Connecting part; 2, Elastic claw; 21, Snap-fit ​​part; 3, Sealing ring; 4, Operating ear plate; 41, Connecting arm; 5, Forced self-destruction part; 51, Sliding cavity; 52, Self-destruction claw; 521, Sliding plate; 53, Driving component; 531, Slide groove; 532, Connecting plate; 533, Sliding stop groove; 534, First guide groove; 535, Second guide groove; 536, First magnet; 537, Second magnet; 54, Limiting spring; 55, Locking groove. Detailed Implementation

[0028] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0029] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0030] This invention provides a quick-connect device for a high-pressure contrast injection syringe, used to connect a syringe barrel and a needle holder. One end of the syringe barrel is an insertion end, and one end of the needle holder is a plug-in end. The plug-in end and the insertion end are plugged into each other. The quick-connect device includes a fastening part on the syringe barrel and an elastic claw on the needle holder. The elastic claw engages with the fastening part. Two elastic claws are symmetrically arranged on the outer wall of the needle holder. One end of the elastic claw is connected to the needle holder, and the other end extends axially towards the side closer to the plug-in end. The side of the elastic claw near the plug-in end is inclined away from the needle holder. Both ends of the elastic claw have a engaging part that engages with the fastening part.

[0031] This invention provides a quick-connect device for a high-pressure contrast injector. Two symmetrically arranged elastic claws on the needle holder engage with locking positions on the syringe barrel to achieve a quick, direct insertion connection between the needle and needle holder, offering convenient and highly reliable connection. Furthermore, the elastic claws are angled and have locking portions at both ends. During injection, the insertion end is inserted into the syringe barrel, and the side of the elastic claw closest to the insertion end deforms inward, engaging the locking portion on that side with the snap-fit ​​portion, facilitating insertion and separation of the needle and needle holder. After one use, the needle holder with the needle installed is flipped and inserted into the syringe barrel. The locking portion of the elastic claw furthest from the insertion end engages with the snap-fit ​​portion, making it difficult to separate the needle and needle holder by pressing the elastic claws, thus achieving self-destruction. Therefore, this quick-connect device ensures reliable needle-needle holder connection while also enabling self-destruction after one use.

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-7 As shown, this embodiment of the invention provides a quick connection device for the syringe barrel of a high-pressure injector, which is used for quick connection between a disposable syringe barrel 100 and a needle tip and can be self-destructed after use. It aims to solve the problem of difficulty in balancing the connection reliability and self-destruction function of the syringe barrel and needle tip in existing high-pressure contrast injectors. The quick connection device for the syringe barrel provided by this invention has the advantages of convenient connection and simplified structure through structural improvement.

[0034] Example 1: like Figure 1 , Figure 2 , Figure 3 As shown, in this embodiment of the invention, the quick-connect syringe device is used to connect the syringe 100 and the needle holder 200. One end of the syringe 100 is the insertion end 101, and one end of the needle holder 200 is the insertion end 201. The insertion end 201 and the insertion end 101 are inserted into each other. The quick-connect syringe device 300 includes a fastening part 1 on the syringe 100 and an elastic claw 2 on the needle holder 200. The elastic claw 2 is engaged with the fastening part 1. The elastic claw 2 is connected to the outer wall of the needle holder 200 and two are symmetrically arranged. One end of the claw 2 is connected to the needle holder 200, and the other end extends axially towards the side close to the insertion end 201. The side of the elastic claw 2 close to the insertion end 201 is inclined away from the needle holder 200. Both ends of the elastic claw 2 have a engaging part 21 that engages with the fastening part 1.

[0035] Specifically, the syringe 100 has a cylindrical structure, with the diameter gradually decreasing on one side of the insertion end 101; the needle holder 200 is used to install and connect the needle, and the insertion end 201 of the needle holder 200 is inserted and engaged with the insertion end 101 of the syringe 100 to realize the connection between the syringe 100 and the needle holder 200. The connection is made by direct insertion, which helps to improve the convenience and efficiency of the connection.

[0036] Furthermore, the latching part 1 is a snap-fit ​​hole opened on the side wall of the syringe 100 near the insertion end 101, and the snap-fit ​​part 21 is a wedge-shaped protrusion. The snap-fit ​​parts 21 at both ends of the elastic claw 2 are arranged with their inclined surfaces facing away from each other.

[0037] Specifically, the elastic claw 2 is made of a material with elastic deformation and can be integrally molded with the needle holder 200. One end of the elastic claw 2 is fixedly connected to the outer wall of the needle holder 200, and the other end is a free end that extends towards the insertion end 201, with the free end inclined in a direction away from the needle holder 200. Therefore, it is easy to press the symmetrical elastic claws 2 on both sides near the insertion end 201 inward and deform them. After the pressing pressure is removed, the elastic claw 2 automatically springs back to its original position; while the side of the elastic claw 2 away from the insertion end 201 is not easy to deform. Both ends of the elastic claw 2 have wedge-shaped protrusions on their outer sides, and the port on the insertion end 101 side of the syringe 100 can be machined with a bevel. Two symmetrical locking holes that can cooperate with the locking parts 21 are opened on the side wall of the syringe 100 near the insertion end 101. Therefore, pressing the elastic claw 2 near the insertion end 201 allows the insertion end 201 to be inserted into the syringe end 101. After the elastic claw 2 springs back, a reliable connection between the needle and the syringe 100 is achieved. If the needle holder 200 is rotated 180° and then inserted into the syringe end 101, the needle enters the syringe 100, ensuring safe retrieval. After the needle holder 200 is rotated, the locking part 21 on the side of the elastic claw 2 away from the insertion end 201 is press-fitted with the syringe end 101, and the locking part 21 engages with the fastening part 1. The elastic claw 2 on this side is not easily deformed inwards, making it difficult to separate the needle holder 200 from the syringe 100, thus achieving self-destruction. Therefore, the syringe quick-connect device 300 ensures reliable connection between the needle and needle holder 200 while also achieving self-destruction after single use.

[0038] Furthermore, the insertion end 201 of the needle holder 200 is tapered, and the needle holder 200 has a first channel 202 inside. The syringe 100 has a tapered second channel 102 inside, and the insertion end 201 is inserted into the second channel 102. When the syringe 100 and the needle holder 200 are connected, their internal liquid channels are interconnected. The tapered insertion end 201 of the needle holder 200 and the insertion end 101 of the syringe 100 further improve the reliability of the connection between the needle and the needle holder 200, and also enhance the sealing at the connection point between the syringe 100 and the needle holder 200.

[0039] Furthermore, a conical sealing ring 3 is fitted onto the side of the needle holder 200 near the insertion end 201, and the sealing ring 3 fits against the side wall of the second channel 102. For example, an annular groove can be formed on the side of the insertion end 201 of the needle holder 200, at a distance from the end, and the sealing ring 3 can be embedded in the groove. After the syringe 100 and the needle holder 200 are inserted, the inner wall of the syringe 100 fits tightly against the sealing ring 3, which helps to further improve the sealing effect at the connection.

[0040] like Figure 3As shown, in this embodiment of the invention, an operating ear plate 4 is provided on the outer side of the elastic claw 2, which is connected to the middle of the elastic claw 2 through a connecting arm 41. The length of the operating ear plate 4 on the side near the insertion end 201 is greater than the length on the other side.

[0041] Specifically, one end of the connecting arm 41 is fixedly connected to the elastic claw 2, and the other end is fixedly connected to the operating ear plate 4. The connecting arm 41 also has a rib on the side facing away from the insertion end 201. The connecting arm 41 is gradually inclined away from the insertion end 201 along the direction close to the operating ear plate 4. The symmetrically arranged operating ear plates 4 on both sides facilitate pressing the elastic claws 2 on both sides to deform them. Furthermore, the length of the operating ear plate 4 on the side closer to the insertion end 201 is greater than the length of the other side, meaning the force-applying arm on the side of the operating ear plate 4 closer to the insertion end 201 is longer, thus facilitating deformation of the side of the elastic claw 2 closest to the insertion end 201. Simultaneously, pressing the elastic claw 2 using the operating ear plate 4 avoids direct contact with the elastic claw 2, preventing contamination with contrast agent.

[0042] Meanwhile, a support seat 203 is provided on the outer wall of the needle holder 200. The support seat 203 is located on the side of the elastic claw 2 near the insertion end 201, and the side of the syringe 100 near the insertion end 101 matches the support seat 203. For example, the support seat 203 can be formed into an annular seat on the outer wall of the insertion end 201 of the needle holder 200, and symmetrical parallel surfaces are machined on the side wall of the annular seat. The internal shape of the syringe 100 can match the support seat 203, which can guide and position the syringe 100 when it is inserted into the needle holder 200.

[0043] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in this embodiment of the invention, the quick-connect syringe device 300 further includes a forced self-destruction part 5. The forced self-destruction part 5 is used to ensure that the syringe 100 and the needle holder 200 are no longer suitable for secondary use after one use and separation. For example, after the syringe 100 is separated from the needle assembly, the integrity or tilt state of the elastic claw 2 can be destroyed, so that the locking part 21 on the side near the insertion end 201 can no longer connect with the fastening part 1, thereby preventing the insertion and fixation, and avoiding the secondary use of the syringe 100 and the needle holder 200.

[0044] like Figure 4 and Figure 5 As shown, furthermore, a sliding cavity 51 is provided inside the support base 203, and the forced self-destruction part 5 includes: The self-destructing claw 52 is embedded in the sliding cavity 51. The self-destructing claw 52 is connected to the sliding plate 521, which is slidably disposed in the sliding cavity 51. The inner side of the elastic claw 2 has a locking groove 55 that matches the self-destructing claw 52. The driving component 53 is used to drive the self-destructing claw 52 to slide out of the sliding cavity 51 in the direction away from the insertion end 201 before the syringe 100 and the needle holder 200 are separated after one use. The limiting spring 54 is located at the bottom of the sliding cavity 51 on the side away from the insertion end 201. After the driving member 53 drives the self-destructing claw 52 to slide the maximum distance, the sliding plate 521 abuts against the limiting spring 54, and at this time there is a gap between the sliding plate 521 and the bottom of the sliding cavity 51.

[0045] Specifically, the support base 203 is located between the elastic claw 2 and the insertion end 201. A sliding cavity 51 is formed on the bottom surface of the support base 203 facing the elastic claw 2, and the self-destructing claw 52 is disposed in the sliding cavity 51. The self-destructing claw 52 has a wedge-shaped cross-section and can be connected to the sliding plate 521 through a connecting rod. The connection between the self-destructing claw 52 and the connecting rod has a groove. A locking groove 55 is formed on the inner side of the elastic claw 2. The locking groove 55 can be L-shaped in cross-section. The self-destructing claw 52 can be completely inserted into the locking groove 55. When it rebounds, the side wall of the self-destructing claw 52 abuts against the side wall of the locking groove 55, thereby restricting the elastic claw 2 from resetting.

[0046] When the syringe 100 and needle holder 200 are not inserted, the self-destruct claw 52 is located within the sliding cavity 51. The self-destruct claw 52 and the wall of the sliding cavity 51 can be temporarily connected by means of elastic pins or magnetic attraction to ensure that the self-destruct claw 52 will not slide out of the sliding cavity 51 before being inserted into the syringe 100. Only when the syringe 100 and needle holder 200 have been used once and are separated, the drive unit 53 drives the self-destruct claw 52 to slide and disengage from the sliding cavity 51.

[0047] Simultaneously, after the drive cavity drives the self-destructing claw 52 to slide to its maximum distance, the sliding plate 521 abuts against the limiting spring 54, and at this time there is a gap between the sliding plate 521 and the bottom of the sliding cavity 51. Thus, when the elastic claw 2 deforms inward, the edge of the locking groove 55 abuts against the inclined surface of the self-destructing claw 52, ​​and pushes the self-destructing claw 52 to continue sliding downward. The limiting spring 54 is compressed. When the self-destructing claw 52 is fully inserted into the locking groove 55, the groove part on the self-destructing claw 52 coincides with the protruding part of the locking groove 55. The self-destructing claw 52 will rebound a certain distance under the action of the limiting spring 54, so that the side wall of the self-destructing claw 52 abuts against the side wall of the locking groove 55 to lock the elastic claw 2 and the self-destructing claw 52.

[0048] Therefore, after the syringe 100 and needle holder 200 have been used once and before separation, the drive will cause the self-destructing claw 52 to slide and extend away from the insertion end 201. Then, by operating the ear plate 4, the elastic claw 2 is pressed inward, so that the needle holder 200 can be separated from the syringe 100. When the elastic claw 2 deforms inward, the self-destructing claw 52 can be locked into the locking groove 55, locking the elastic claw 2 and the self-destructing claw 52, ​​thereby achieving the purpose of limiting the rebound of the elastic claw 2. When the elastic claw 2 is locked, when one end of the insertion end 201 of the needle holder 200 is inserted into the insertion end 101, the locking part 21 of the elastic claw 2 near the insertion end 201 can no longer engage with the fastening part 1, so the syringe 100 and the needle holder 200 can no longer be securely connected. At this time, the diameter of the locking part 21 on the side of the elastic claw 2 away from the insertion end 201 is larger than the diameter of the locking part 21 on the other side. Thus, when the needle holder 200 is flipped and inserted into the syringe 100, the locking part 21 on the side of the elastic claw 2 away from the insertion end 201 can connect with the fastening part 1, thereby achieving self-destruction of the needle holder 200 and preventing the syringe 100 and the needle holder 200 from being reused.

[0049] For example, a groove 531 is provided on the outer wall of the support base 203, the groove 531 communicates with the sliding cavity 51, the driving member 53 includes a connecting plate 532 disposed in the groove 531, the connecting plate 532 is connected to the sliding plate 521, and its end protrudes from the outer wall of the support base 203, and a sliding groove 533 is provided on the inner wall of the syringe 100 near the insertion end 101, the sliding groove 533 is used to accommodate the end of the connecting plate 532 protruding from the support base 203.

[0050] Specifically, a sliding groove 533 along the axial direction is provided on the inner wall of the syringe 100. When the syringe 100 is inserted into the needle holder 200, the end of the connecting plate 532 is located in the sliding groove 533. When the connecting plate 532 abuts against the top side wall of the sliding groove 533, and the syringe 100 and the needle holder 200 are continuously inserted, the self-destructing claw 52 can be driven to slide and disengage from the sliding cavity 51 by the sliding plate 521.

[0051] Example 2: like Figure 6 ,and Figure 7 As shown, the difference between this embodiment and embodiment one is that in this embodiment, a first guide groove 534 is provided on the inner wall of the sliding cavity 51, a second guide groove 535 is provided on the inner wall of the needle holder 200, and the driving member 53 includes a first magnetic block 536 slidably disposed in the first guide groove 534 and a second magnetic block 537 slidably disposed in the second guide groove 535. The first magnetic block 536 and the second magnetic block 537 attract each other.

[0052] In actual use, after the syringe 100 and the needle holder 200 are connected, there may be situations where they need to be separated without injection. Therefore, it is necessary to ensure that the syringe 100 and the needle holder 200 can still be reconnected after separation. For this reason, the driving component 53 is improved in this embodiment.

[0053] The second guide groove 535 is located in the first channel 202 of the needle holder 200, and the first guide groove 534 is located in the support base 203. The first guide groove 534 and the second guide groove 535 are not connected. The first magnetic block 536 and the second magnetic block 537 attract each other. Therefore, when the second magnetic block 537 slides in the second guide groove 535, it can drive the first magnetic block 536 to slide in the first guide groove 534, which in turn can drive the self-destructing claw 52 of the sliding plate 521 to slide. After the syringe 100 is inserted into the needle holder 200, during the contrast agent injection process, when the contrast agent passes through the first channel 202, it can drive the second magnetic block 537 to move away from the insertion end 201, which in turn can drive the first magnetic block 536 to move, so that the self-destructing claw 52 slides and disengages from the sliding cavity 51. Therefore, the self-destruct claw 52 can only slide out after the contrast injection is performed and play a self-destructing role when the syringe 100 and needle holder 200 are separated. This helps to improve the applicability of the quick-connect syringe device 300 and more accurately avoid the reuse of used syringes 100 and needle holder 200.

[0054] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A syringe quick connection device of a high pressure contrast injector, used for connecting a syringe (100) and a needle seat (200), one end of the syringe (100) is a syringe insertion end (101), one end of the needle seat (200) is a needle insertion end (201), the needle insertion end (201) is inserted and matched with the syringe insertion end (101), characterized in that, The needle cylinder quick connecting device (300) comprises a clasp (1) arranged on the needle cylinder (100) and an elastic claw (2) arranged on the needle seat (200), and the elastic claw (2) is in clamping cooperation with the clasp (1). The elastic claw (2) is connected to the outer side wall of the needle seat (200) and is symmetrically provided with two ends, one end of which is connected to the needle seat (200), and the other end extends along the axial direction and towards the side close to the insertion end (201), and the elastic claw (2) is arranged in an inclined manner towards the direction away from the needle seat (200) on the side close to the insertion end (201), and the elastic claw (2) is provided with a clamping portion (21) at both ends for clamping cooperation with the clasp (1).

2. The syringe quick connect of a high pressure contrast injector of claim 1, wherein, The clasp (1) is a clamping hole arranged on the side wall of the needle cylinder (100) close to the insertion end (101), the clamping portion (21) is a protrusion with a wedge-shaped cross section, and the clamping portions (21) at both ends of the elastic claw (2) are arranged in opposite inclined surfaces.

3. The syringe quick connect of a high pressure contrast injector of claim 1, wherein, The insertion end (201) of the needle seat (200) is conical, and the needle seat (200) has a first channel (202) inside, and the needle cylinder (100) has a second channel (102) formed therein in a conical shape, and the insertion end (201) is inserted into the second channel (102).

4. The syringe quick connect of a high pressure contrast injector of claim 3, wherein, The needle seat (200) is provided with a conical sealing ring (3) on the side close to the insertion end (201), and the sealing ring (3) is in contact with the side wall of the second channel (102).

5. The syringe quick connect of a high pressure contrast injector of claim 3, wherein, An operating lug (4) is arranged on the outer side of the elastic claw (2), which is connected to the middle part of the elastic claw (2) through a connecting arm (41), and the length of the operating lug (4) on the side close to the insertion end (201) is greater than that on the other side.

6. The syringe quick connect of a high pressure contrast injector of claim 5, wherein, A supporting seat (203) is arranged on the outer side wall of the needle seat (200), which is located on the side close to the insertion end (201) of the elastic claw (2), and the side close to the insertion end (101) of the needle cylinder (100) is matched with the supporting seat (203).

7. The syringe quick connect of a high pressure contrast injector of claim 6, wherein, The needle cylinder quick connecting device (300) further comprises a forced self-destruction part (5), which is used to make the needle cylinder (100) and the needle seat (200) not to be used again after being separated after one-time use.

8. The syringe quick connect of a high pressure contrast injector of claim 7, wherein, The supporting seat (203) is provided with a sliding cavity (51), and the forced self-destruction part (5) comprises: A self-destruction claw (52) embedded in the sliding cavity (51), the self-destruction claw (52) is connected with a sliding plate (521), the sliding plate (521) is slidably arranged in the sliding cavity (51), and the inner side of the elastic claw (2) is provided with a locking groove (55) matched with the self-destruction claw (52); A driving member (53) for driving the self-destruction claw (52) to slide out of the sliding cavity (51) in the direction away from the insertion end (201) before the needle cylinder (100) and the needle seat (200) are separated after one-time use. A limiting spring (54) is arranged at the bottom of the sliding cavity (51) away from the insertion end (201), and the sliding plate (521) abuts against the limiting spring (54) after the driving member (53) drives the self-destroying clamping jaw (52) to slide the maximum distance, and at this time, the sliding plate (521) has a gap with the bottom of the sliding cavity (51).

9. The syringe quick connect of a high pressure contrast injector of claim 8, wherein, A sliding groove (531) is arranged on the outer side wall of the support seat (203), and the sliding groove (531) is communicated with the sliding cavity (51), the driving member (53) comprises a connecting plate (532) arranged in the sliding groove (531), the connecting plate (532) is connected with the sliding plate (521), and the end portion thereof protrudes from the outer side wall of the support seat (203), and a sliding stop groove (533) is arranged on the inner wall of the needle cylinder (100) close to the insertion end (101), and the sliding stop groove (533) is used for accommodating the end portion of the connecting plate (532) protruding from the support seat (203).

10. The syringe quick connect of a high pressure contrast injector of claim 8, wherein, A first guide groove (534) is arranged on the inner side wall of the sliding cavity (51), a second guide groove (535) is arranged on the inner wall of the needle head seat (200), the driving member (53) comprises a first magnetic block (536) slidingly arranged in the first guide groove (534) and a second magnetic block (537) slidingly arranged in the second guide groove (535), and the first magnetic block (536) and the second magnetic block (537) are attracted to each other.

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