A new type of indwelling needle that can automatically deliver the tube with one hand

Abstract

The present invention discloses a new type of indwelling needle that can automatically deliver a tube with one hand, comprising: an indwelling needle seat, a handle, a catheter and a puncture steel needle, wherein the catheter is fixedly connected to one end of the indwelling needle seat, and a handle is arranged at the other end of the indwelling needle seat, and the handle is fixedly connected to the puncture steel needle on the side close to the indwelling needle seat, so that the puncture steel needle passes through the indwelling needle seat and the catheter; the indwelling needle seat is a cavity structure, and a barrier plug is fixedly connected in the cavity of the indwelling needle seat, and a stop block is fixedly connected on the side of the barrier plug away from the catheter, and a compression spring is sleeved on the outer wall of the puncture steel needle between the stop block and the handle, and the two ends of the compression spring are respectively in contact with the handle and the stop block support; the handle is connected to the indwelling needle seat by a buckle. The new type of indwelling needle can realize automatic tube delivery with one hand during intravenous puncture, solve the puncture failure caused by manual tube delivery and needle withdrawal, and improve the puncture success rate of the indwelling needle.

Description

Technical Field

[0001] The invention discloses a medical device used for intravenous treatment, in particular to a novel indwelling needle which can automatically deliver a tube with one hand during the process of venous puncture. Background Art

[0002] Intravenous infusion is an important way of clinical drug administration. According to public data, Chinese people infuse more than 10 billion bottles of fluids each year. With the implementation of "zero tolerance for steel needles", indwelling needles have become the main tool for clinical infusion therapy. They have the advantages of not easily damaging blood vessels and reducing the number of venous punctures for patients. While ensuring intravenous medication, they not only reduce the pain of patients, but also improve the work efficiency of nurses. In clinical nursing work, most of the existing indwelling needle punctures use the two-handed method. During the operation, the left hand tightens the skin, the right hand holds the needle for puncture, and then the right hand fixes the needle wing, and the left hand holds the needle seat to send the catheter, and the catheter is fully inserted into the blood vessel and then the needle core is pulled out.

[0003] However, for some patients with obesity, edema, poor vascular elasticity, loose skin or impaired consciousness, a nurse often cannot complete the operation alone and needs the assistance of two or more nurses, which leads to an increase in manpower. Especially at night and in emergency situations, without help to restrain the limbs, it is more difficult to succeed in puncture. The reason is that in the prior art, when the indwelling needle puncture is delivered by both hands, the puncture site cannot be fixed due to the change of the left hand to deliver the tube, or the position of the needle tip in the blood vessel changes when the direction of the indwelling needle outer tube is rotated, resulting in puncture failure.

[0004] In clinical practice, some nurses also use the one-hand method. During the operation, the left hand holds the skin tight, and the right hand holds the needle for puncture. When delivering the tube, the left hand still holds the skin tight, and the thumb of the right hand holding the needle pushes the catheter forward into the blood vessel, while the index finger pushes the needle handle backward to withdraw the needle core. When delivering the tube with one hand, the thumb and index finger of the right hand must exert force in the same and opposite directions. It is not easy for the two fingers to coordinate and balance the strength. The nurses find it difficult to grasp the stability of the indwelling needle and the angle of delivery, which leads to puncture failure.

[0005] It can be seen that, in the prior art, puncture failure of the indwelling needle often occurs during the needle withdrawal process of manual tube delivery; or puncture can only be performed by both hands; however, puncture failure of the indwelling needle not only increases the patient's pain, but also easily leads to conflicts between nurses and patients. Summary of the invention

[0006] In view of this, the main purpose of the present invention is to provide a new type of indwelling needle that can automatically deliver the tube with one hand, so as to solve the problem that manual delivery and needle withdrawal may easily lead to puncture failure or the defect of inconvenient operation during two-handed puncture operation, and improve the puncture success rate of the indwelling needle.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] A new type of indwelling needle that can automatically deliver a tube with one hand comprises: an indwelling needle seat, a handle, a catheter and a puncture needle, the catheter is fixedly connected to one end of the indwelling needle seat, and a handle is arranged at the other end of the indwelling needle seat, and the handle is fixedly connected to the puncture needle on the side close to the indwelling needle seat, so that the puncture needle passes through the indwelling needle seat and the catheter; the indwelling needle seat is a cavity structure, and a barrier plug is fixedly connected in the cavity of the indwelling needle seat, and a stop block is fixedly connected to the side of the barrier plug away from the catheter, a compression spring is sleeved on the outer wall of the puncture needle between the stop block and the handle, and the two ends of the compression spring are respectively in contact with the handle and the stop block support; the handle and the indwelling needle seat are connected by a snap.

[0009] In a preferred embodiment, the buckle includes: a limiting protrusion provided on the contact surface between the handle and the indwelling needle seat, so that the handle and the indwelling needle seat are detachably connected.

[0010] In a preferred embodiment, the buckle also includes: an arc-shaped hole opened on the needle seat wall of the indwelling needle seat, and an arc-shaped push rod arranged inside the arc-shaped hole; both ends of the arc-shaped hole extend out of the outer wall of the indwelling needle seat, and the extending hole of the arc-shaped hole at the contact surface between the handle and the indwelling needle seat is a first opening, and the position of the first opening is adapted to the position and size of the limiting protrusion, so that the limiting protrusion is snapped into the first opening.

[0011] In a preferred embodiment, the buckle also includes: a spring arranged on the outer wall of the arc-shaped push rod, and a first limiting ring arranged inside the arc-shaped hole and close to the first opening position; the other opening of the arc-shaped hole on the outer wall of the indwelling needle seat is a second opening, and the second opening is opened in the area of ​​the handle not covering the indwelling needle seat, and a second limiting ring is arranged inside the arc-shaped hole and close to the second opening position, and the arc-shaped push rod is fixedly connected to the spring seat at one end close to the second opening, and both ends of the spring are respectively supported and connected to the first limiting ring and the spring seat.

[0012] In a preferred embodiment, the buckle further includes: a push head, which is arranged at the first opening, the middle part of the lower end of the push head is fixedly connected to the end of the arc-shaped push rod, and the edge of the push head is supported by the first limiting ring.

[0013] In a preferred embodiment, the buckle further includes: a snap button, which is arranged at the second opening, and the lower end of the snap button passes through the middle of the second limiting ring and is fixedly connected to the other end of the arc-shaped push rod.

[0014] In a preferred embodiment, the buckle also includes: a flexible cover, the edge of the flexible cover is fixedly connected to the edge of the second opening, the flexible cover is arc-shaped and the middle part protrudes away from the second opening, and the snap button is fixedly connected to the inner wall of the flexible cover.

[0015] In another preferred embodiment, the buckle includes: a limiting hole penetrating the needle seat wall of the indwelling needle seat, and a buckle groove opened on the outer wall of the indwelling needle seat; an elastic buckle strip is fixedly connected to the inside of the buckle groove so that the elastic buckle strip is buckled or detached from the limiting hole.

[0016] In a preferred embodiment, the buckle also includes: a push-press body, the lower end of which contacts and presses the elastic hanging buckle strip, so that the elastic hanging buckle strip bends downward and disengages from the limiting hole; the buckle also includes: an elastic cover, the edge of the elastic cover is fixedly connected to the limiting hole, and the middle part of the inner wall of the elastic cover is fixedly connected to the upper end of the push-press body, so that the elastic cover can elastically recover and drive the push-press body to move upward.

[0017] In a preferred embodiment, the handle and the contact surface of the indwelling needle seat are integrally formed with or fixedly connected with a guide convex strip, and the contact surface of the indwelling needle seat and the handle is provided with a guide notch.

[0018] The novel indwelling needle capable of automatically delivering the tube with one hand of the present invention has the following beneficial effects:

[0019] The new type of indwelling needle that can deliver the tube automatically with one hand, the catheter is fixedly connected to one end of the indwelling needle seat, the other end of the indwelling needle seat is provided with a handle, the side of the handle close to the indwelling needle seat is fixedly connected to the puncture needle; the indwelling needle seat is a cavity structure, the cavity of the indwelling needle seat is fixedly connected to a blocking plug, the side of the blocking plug away from the catheter is fixedly connected to a stop block, the outer wall of the puncture needle between the stop block and the handle is sleeved with a compression spring, the two ends of the compression spring are respectively in contact with the handle and the stop block support; the handle and the indwelling needle seat are connected by a buckle. The existing technology solves the problem that the indwelling needle can only complete the puncture process by manually delivering the tube, especially for patients with obesity, edema, poor vascular elasticity, loose skin or impaired consciousness. When delivering the tube with both hands, the medical staff must have someone to cooperate in pressing the patient's puncture limb or straightening the blood vessel to meet the defects of the puncture process; and when delivering the tube with one hand, nurses often find it difficult to grasp the stability and delivery angle of the indwelling needle, which has great limitations in clinical applications. The new indwelling needle capable of automatically delivering the tube with one hand can be automatically delivered by the medical staff through simple operations such as pressing the handle with one hand to release the buckle to make the compressed spring in the needle seat rebound, and push the stop block to slide forward in the needle seat, while the left hand pressing the patient's punctured limb or straightening the blood vessel does not change its position at all times, thereby solving the problem of puncture failure caused by needle tip displacement, blood vessel bending or difficulty in grasping the stability of the indwelling needle and the delivery angle when the indwelling needle is manually delivered with one hand, fundamentally solving the problem of easy puncture failure in the manual tube delivery link of the existing indwelling needle, and improving the puncture success rate of the indwelling needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of a novel indwelling needle capable of automatically delivering a tube with one hand according to an embodiment of the present disclosure;

[0021] Figure 2 for Figure 1 A cross-sectional view of a novel indwelling needle capable of automatically delivering a tube with one hand according to an embodiment of the present disclosure is shown;

[0022] Figure 3 for Figure 1 A partial cross-sectional view of a novel indwelling needle capable of automatically delivering a tube with one hand according to an embodiment of the present disclosure is shown;

[0023] Figure 4 for Figure 2 A partial cross-sectional view of a novel indwelling needle capable of automatically delivering a tube with one hand according to an embodiment of the present disclosure is shown;

[0024] Figure 5 It is a partial cross-sectional view of the indwelling needle seat of a new indwelling needle capable of one-handed automatic tube delivery at the position of the arc-shaped hole according to an embodiment of the present disclosure;

[0025] Figure 6 It is a structural schematic diagram of a novel indwelling needle capable of automatically delivering a tube with one hand according to another embodiment of the present disclosure;

[0026] Figure 7 for Figure 6 An AA line cross-sectional view of a novel indwelling needle capable of automatic one-handed tube delivery according to another embodiment of the present disclosure.

[0027]

Main component symbol description

[0028] 1. Indwelling needle seat, 11. Blocking plug, 12. Stop block, 13. Compression spring, 14. Limiting boss;

[0029] 2. Handle, 3. Catheter, 4. Puncture needle;

[0030] 51. Limiting protrusion;

[0031] 52, arc-shaped hole, 521, first opening, 522, second opening;

[0032] 53. arc-shaped push rod, 54. spring, 55. first limiting ring, 56. second limiting ring, 57. spring seat, 58. push head, 59. snap button, 510. flexible cover;

[0033] 61. Limiting hole, 62. Buckle slot, 63. Elastic buckle strip, 64. Pushing body, 65. Elastic cover. DETAILED DESCRIPTION

[0034] The novel indwelling needle capable of automatically delivering the tube with one hand of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the new indwelling needle capable of automatically delivering the tube with one hand comprises: an indwelling needle seat 1, a handle 2 for convenient holding and pulling out the puncture steel needle from the catheter 3 and the patient's blood vessel, a catheter 3 mainly indwelling in the patient's blood vessel and delivering drugs to the patient, and a puncture steel needle 4 for puncturing the patient's skin to ensure that the catheter 3 is inserted into the patient's blood vessel. The catheter 3 is fixedly connected to one end of the indwelling needle seat 1, and the handle 2 is set at the other end of the indwelling needle seat 1. The side of the handle 2 close to the indwelling needle seat 1 is fixedly connected to the puncture steel needle 4, so that the puncture steel needle 4 is set in the indwelling needle seat 1 and the catheter 3. Of course, the indwelling needle seat 1 is a cavity structure, which is convenient for conducting the infusion liquid inside the cavity. Furthermore, in order to prevent the medicine inside the indwelling needle from flowing out along the rear end of the indwelling needle seat 1 after the puncture needle 4 is pulled out, a barrier plug 11 is fixedly connected in the cavity of the indwelling needle seat 1, and the barrier plug 11 divides the cavity inside the indwelling needle seat 1 into a cavity area for the flow of medicine and an area where the push device is located to push the entire indwelling needle seat 1 relative to the handle 2 to move toward the patient's infusion position. In order to reduce the manufacturing cost of the entire indwelling needle, the preferred push device is a compression spring 13. Further, in order to facilitate the operation of the compression spring 13, a stop block 12 is fixedly connected to the side of the barrier plug 11 away from the catheter 3, and a compression spring 13 is sleeved on the outer wall of the puncture needle 4 between the stop block 12 and the handle 2, and the two ends of the compression spring 13 are respectively in support contact with the handle 2 and the stop block 12; preferably, a limiting boss 14 is fixedly connected to the contact surface of the handle 2 and the stop block 12, and is inserted into the cavity of the indwelling needle seat 1 through the limiting boss 14. The setting of the limiting boss 14 further facilitates the fixed connection between the handle 2 and the puncture needle 4. In the manufacturing process, the limiting boss 14 can be fixedly connected to the puncture needle 4, and the handle 2 can be produced separately. Then, the connection between the handle 2 and the limiting boss 14 facilitates the manufacturing process of the entire indwelling needle and reduces the production cost of the indwelling needle.

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in order to facilitate the use of medical staff, the handle 2 is separated from the indwelling needle seat 1 by one-hand operation, and the indwelling needle seat 1 is pushed by the compression spring 12, thereby pushing the catheter 3 to move to the patient's infusion position, so as to meet the requirements of pushing the catheter 3 to a reasonable position for the patient's infusion. The handle 2 and the indwelling needle seat 1 are connected by a buckle, and the medical staff can quickly open the buckle with one hand, so as to push the indwelling needle seat 1 and the catheter 3 to a reasonable position by the compression spring 13, so as to achieve the purpose of one-hand operation.

[0041] Specifically: During puncture, medical staff can use one hand to tighten the skin of the patient's puncture site to ensure that the blood vessels are in a straightened state. Medical staff can use the other hand to hold the indwelling needle and insert the needle, and use the puncture needle 4 to pierce the puncture site that needs infusion. When the puncture depth of the puncture needle 4 reaches the indwelling needle and blood returns, the needle insertion angle is further lowered, and then slowly enters 0.1-0.2cm. The hand that tightens the skin does not move, and continues to tighten the skin. The other hand holding the indwelling needle holds the handle 2 steadily, and opens the buckle through convenient operations such as pressing, so that the indwelling needle seat 1 and the handle 2 are separated. The compressed spring 13 in the compressed state bounces off and pushes the indwelling needle seat 1, and then the catheter 3 is inserted into the patient's puncture site, and the puncture needle 4 and the handle 2 remain stationary. The end of the puncture needle 4 is further retracted into the catheter 3 to complete the puncture. During the whole process of puncture and tube delivery, the hand that tightens the skin always fixes the punctured limb or tightens the skin or straightens the blood vessels or fixes the blood vessels, and only the hand holding the indwelling needle delivers the tube alone. This solves the problem that the puncture part cannot remain stable due to the patient's inability to cooperate, or the patient's blood vessels are relatively curved and easy to puncture, and the blood vessels need to be straightened. The new indwelling needle that can automatically deliver the tube with one hand completely frees one hand of the medical staff, and the operation of automatic tube delivery and needle withdrawal can be smoothly realized by one-hand operation. In particular, it solves the defect in the prior art that the cooperation of multiple people is required to complete the puncture process for pediatric, mentally ill patients or the elderly. It also solves the problem of puncture failure caused by the difficulty in grasping the stability of the indwelling needle and the delivery angle when delivering the tube with one hand in the prior art.

[0042] In order to adapt to the existing indwelling needles, especially to facilitate the existing nursing staff's habit of using indwelling needles, the handle 2 of the new indwelling needle that can automatically deliver the tube with one hand is a butterfly structure.

[0043] In one embodiment, the buckle includes: a limiting protrusion 51 provided on the contact surface between the handle 2 and the indwelling needle seat 1, so that the handle 2 and the indwelling needle seat 1 are detachably connected. The limiting protrusion 51 prevents the connection between the handle 2 and the indwelling needle seat 1 from being too strong. During use, the handle 2 can be held tightly by the holding hand, and the connection strength between the handle 2 and the indwelling needle seat 1 can be further ensured by pressing the handle 2. When the catheter 3 needs to be pushed forward, the handle 2 is released, and the handle 2 is slightly touched (for example, the medical staff slightly presses the handle 2 with the fingernail), so that the limiting boss 14 separates the indwelling needle seat 1 from the handle 2, thereby realizing the advancement of the catheter 3 by one hand.

[0044] In order to further facilitate the medical staff to separate the handle 2 from the indwelling needle seat 1, the buckle also includes: an arc-shaped hole 52 opened on the needle seat wall of the indwelling needle seat 1, and an arc-shaped push rod 53 arranged inside the arc-shaped hole 52. The two ends of the arc-shaped hole 52 extend out of the outer wall of the indwelling needle seat 1, and the extending hole of the arc-shaped hole 52 at the contact surface of the handle 2 and the indwelling needle seat 1 is a first opening 521. The position of the first opening 521 is adapted to the position and size of the limiting protrusion 51, so that the limiting protrusion 51 is inserted into the first opening 52. During use, the medical staff presses the arc-shaped push rod 53 at the position of the second opening 522, and the arc-shaped push rod 53 at one end of the first opening 521 pushes the limiting boss 14, thereby separating the handle 2 from the indwelling needle seat 1. By pressing, it is convenient for medical staff to operate and use.

[0045] In order to more conveniently ensure the retraction of the arc push rod 53 and return to the initial position, and to avoid the arc push rod 53 interfering with the limiting boss 14 when the arc push rod 53 is not needed to push the limiting boss 14, causing the handle 2 to be separated from the indwelling needle seat 1. The buckle also includes: a spring 54 arranged on the outer wall of the arc push rod 53, and a first limiting ring 55 arranged inside the arc hole 52 and close to the position of the first opening 521. The other opening of the arc hole 52 on the outer wall of the indwelling needle seat 1 is a second opening 522, and the second opening 522 is opened in the area where the handle 2 does not cover the indwelling needle seat 1. A second limiting ring 56 is arranged inside the arc hole 52 and close to the position of the second opening 522. The arc push rod 53 is fixedly connected to the spring seat 57 at one end close to the second opening 522, and the two ends of the spring 57 are respectively supported and connected with the first limiting ring 55 and the spring seat 57. The spring 57 restores the arc push rod 53 to the initial position, that is, the spring is in a compressed state. When in use, the spring seat 57 pushes the arc-shaped push rod 53 to further push the limiting boss 14 to disengage.

[0046] In order to further facilitate the arc-shaped push rod 53 to push the limiting boss 14, the buckle further includes: a push head 58, which is arranged at the first opening 521 (i.e., the position where the arc-shaped push rod 53 pushes the limiting boss 14), the middle part of the lower end of the push head 58 is fixedly connected to the end of the arc-shaped push rod 53, and the edge of the push head 58 is supported by the first limiting ring 55. Preferably, the push head 58 is an arc-shaped structure, and the arc-shaped surface of the push head 58 is the surface where the limiting boss 14 is pushed, ensuring the pushing effect on the limiting boss 14, avoiding the interference of the push head 58 in the process of pushing the indwelling needle seat 1, and ensuring the smooth progress of puncture and pushing the catheter 3.

[0047] In order to further facilitate the operation of medical staff, especially to facilitate the pressing operation of medical staff to separate the handle 2 and the indwelling needle seat 1, the buckle also includes: a snap button 59, which is arranged at the second opening 522, and the lower end of the snap button 59 passes through the middle of the second limiting ring 56 and is fixedly connected to the other end of the arc push rod 53.

[0048] In order to seal the second opening 522, avoid the accumulation of bacteria or dirt at the second opening 522, and further facilitate the medical staff to push the arc push rod 53. In particular, it is to avoid that the medical staff cannot press the snap button 59 conveniently due to its small size during the process of pressing the snap button 59. The buckle also includes: a flexible cover 510, the edge of the flexible cover 510 is fixedly connected to the edge of the second opening 522, the flexible cover 510 is arc-shaped and the middle part protrudes in the direction away from the second opening 522, and the snap button 59 is fixedly connected to the inner wall of the flexible cover 510. The flexible cover 510 has a certain anti-slip effect, ensuring that the medical staff can press the snap button 59 more smoothly and quickly.

[0049] like Figure 6 and Figure 7 As shown, in another embodiment, the buckle includes: a limiting hole 61 penetrating the needle seat wall of the indwelling needle seat 1, and a buckle groove 62 provided on the outer wall of the indwelling needle seat 1. An elastic buckle strip 63 is fixedly connected inside the buckle groove 62, so that the elastic buckle strip 63 is buckled or disengaged from the limiting hole 61. By pressing the elastic buckle strip 63 at the position of the limiting hole 61, the elastic buckle strip 63 is disengaged from the limiting hole 61, thereby realizing the separation between the indwelling needle seat 1 and the handle 2 by pressing by medical staff.

[0050] In order to further facilitate the operation of medical staff, the buckle also includes: a push-press body 64, the lower end of which contacts and presses the elastic hanging buckle strip 63, so that the elastic hanging buckle strip 63 bends downward and disengages from the limiting hole 61.

[0051] In order to achieve the rebound of the push-press body 64, especially to reduce the safety of the operation affected by inadvertent pressing of the push-press body 64 by medical staff during the puncture process, the buckle also includes: an elastic cover 65, the edge of the elastic cover 65 is fixedly connected to the limiting hole 61, and the middle part of the inner wall of the elastic cover 65 is fixedly connected to the upper end of the push-press body 64, so that the elastic cover 65 elastically recovers to drive the push-press body 64 to move upward.

[0052] like Figure 3 and Figure 4 As shown, in order to ensure that the catheter 3 can be pushed in the direction expected by the medical staff during the process of the compression spring 13 pushing the indwelling needle seat 1, a guide convex strip 7 is integrally formed or fixedly connected on the contact surface between the handle 2 and the indwelling needle seat 1, and a guide notch 8 is provided on the contact surface between the indwelling needle seat 1 and the handle 2. The pushing direction of the catheter 3 is ensured by the cooperation and guidance between the guide convex strip 7 and the wire notch 8.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A new type of indwelling needle capable of automatically delivering the tube with one hand, comprising: An indwelling needle seat (1), a handle (2), a catheter (3) and a puncture needle (4), wherein the catheter (3) is fixedly connected to one end of the indwelling needle seat (1), and a handle (2) is provided at the other end of the indwelling needle seat (1), and the handle (2) is fixedly connected to the puncture needle (4) on the side close to the indwelling needle seat (1), so that the puncture needle (4) passes through the indwelling needle seat (1) and the catheter (3); the indwelling needle seat (1) is a hollow structure, characterized in that A barrier plug (11) is fixedly connected in the cavity of the indwelling needle seat (1), a stopper block (12) is fixedly connected to the side of the barrier plug (11) away from the catheter (3), a compression spring (13) is sleeved on the outer wall of the puncture steel needle (4) between the stopper block (12) and the handle (2), and two ends of the compression spring (13) are respectively in supporting contact with the handle (2) and the stopper block (12); the handle (2) and the indwelling needle seat (1) are connected by a buckle; The buckle comprises: a limiting protrusion (51) provided on the contact surface between the handle (2) and the indwelling needle seat (1), so that the handle (2) and the indwelling needle seat (1) are detachably connected; The buckle further comprises: an arc-shaped hole (52) formed on the needle seat wall of the indwelling needle seat (1), and an arc-shaped push rod (53) arranged inside the arc-shaped hole (52); both ends of the arc-shaped hole (52) extend out of the outer wall of the indwelling needle seat (1), and the extending hole of the arc-shaped hole (52) at the contact surface between the handle (2) and the indwelling needle seat (1) is a first opening (521), and the position of the first opening (521) is adapted to the position and size of the limiting protrusion (51), so that the limiting protrusion (51) is inserted into the first opening (521); The buckle further comprises: a spring (54) arranged on the outer wall of the arc-shaped push rod (53), and a first limiting ring (55) arranged inside the arc-shaped hole (52) and close to the first opening (521); another opening of the arc-shaped hole (52) on the outer wall of the indwelling needle seat (1) is a second opening (522), the second opening (522) is arranged in the area of ​​the handle (2) not covering the indwelling needle seat (1), a second limiting ring (56) is arranged inside the arc-shaped hole (52) and close to the second opening (522), the arc-shaped push rod (53) is fixedly connected to the spring seat (57) at one end close to the second opening (522), and the two ends of the spring (54) are respectively supported and connected to the first limiting ring (55) and the spring seat (57); The buckle further comprises: a push head (58), the push head (58) being arranged at the first opening (521), the middle part of the lower end of the push head (58) being fixedly connected to the end of the arc-shaped push rod (53), and the edge of the push head (58) being supported by the first limiting ring (55); The buckle comprises: a limiting hole (61) penetrating the needle seat wall of the indwelling needle seat (1), and a buckle groove (62) provided on the outer wall of the indwelling needle seat (1); an elastic buckle strip (63) is fixedly connected inside the buckle groove (62) so that the elastic buckle strip (63) is buckled or disengaged from the limiting hole (61).

2. The novel indwelling needle capable of one-handed automatic delivery of the tube according to claim 1 is characterized in that: The buckle further comprises: a snap button (59), wherein the snap button (59) is arranged at the second opening (522), and the lower end of the snap button (59) passes through the middle of the second limiting ring (56) and is fixedly connected to the other end of the arc-shaped push rod (53).

3. The novel indwelling needle capable of one-handed automatic delivery of the tube according to claim 2 is characterized in that: The buckle also includes: a flexible cover (510), the edge of the flexible cover (510) is fixedly connected to the edge of the second opening (522), the flexible cover (510) is arc-shaped and the middle part protrudes in a direction away from the second opening (522), and the snap button (59) is fixedly connected to the inner wall of the flexible cover (510).

4. The novel indwelling needle capable of one-handed automatic delivery of the tube according to claim 1 is characterized in that: The buckle further comprises: a push-press body (64), the lower end of which contacts and presses the elastic buckle strip (63), so that the elastic buckle strip (63) bends downward and disengages from the limiting hole (61); the buckle further comprises: an elastic cover (65), the edge of which is fixedly connected to the limiting hole (61), and the middle part of the inner wall of the elastic cover (65) is fixedly connected to the upper end of the push-press body (64), so that the elastic cover (65) recovers elastically and drives the push-press body (64) to move upward.

5. The novel indwelling needle capable of automatically delivering the tube with one hand according to any one of claims 1 to 4, characterized in that: A guide convex strip (7) is integrally formed or fixedly connected on the contact surface between the handle (2) and the indwelling needle seat (1), and a guide notch (8) is provided on the contact surface between the indwelling needle seat (1) and the handle (2).

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