A type of scalp needle

Abstract

This invention belongs to the field of medical devices, specifically relating to a scalp vein needle, including a needle, a protective sheath, and an infusion tube. The front end of the protective sheath forms a blocking ring, and a slider is disposed inside the protective sheath. A first piston is fixed to the front end of the slider, and an annular protrusion is provided at the rear end of the first piston. A protective cover is provided at the rear end of the slider, fixed to the slider, forming a first sealed chamber between the cover and the slider. The rear end of the needle passes through the first piston and the slider and is fixed to the slider. There is a gap between the protective cover and the protective sheath. A sealing ring is fitted on the protective cover near the rear end, forming a second sealed chamber between the sealing ring and the slider. The protective cover has a connecting hole connecting the first and second sealed chambers. The infusion tube is fixed to the protective sheath and communicates with the second sealed chamber. An operating rod is connected to the rear end of the protective cover, extending beyond the rear end of the protective sheath. This scalp vein needle will not pull on the infusion tube when the needle is pushed forward.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a scalp needle. Background Technology

[0002] Scalp vein needles are commonly used medical instruments by healthcare professionals. The needles of commercially available scalp vein needles are generally exposed, frequently causing accidental injury to healthcare workers during handling. To address this, a puncture-proof scalp vein needle has been developed. A protective sleeve is fitted over the needle tip, with a groove on the sleeve. The needle wings can slide within this groove, allowing the needle tip to be pushed out and retracted into the protective sleeve. This design, to some extent, prevents accidental injury to healthcare workers. However, it has also introduced new technical problems: some needles are connected to IV tubing. When the needle is pushed forward, the connection between the tubing and the needle is subject to traction, sometimes causing the tubing to detach from the needle, affecting the use of the scalp vein needle. How to solve this technical problem has been a subject of ongoing research. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides a scalp needle to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] A scalp vein needle includes a needle tip, a protective sheath, and an infusion tubing. The front end of the protective sheath extends inward to form a blocking ring. A slider is disposed inside the protective sheath, and a first piston is fixed to the front end of the slider. The front end of the first piston can pass through the blocking ring and is located outside the protective sheath. The rear end of the first piston has an annular protrusion that mates with the blocking ring. When the front end of the first piston passes through the blocking ring and is located outside the protective sheath, the annular protrusion abuts against the blocking ring, forming a seal. A protective cover is disposed at the rear end of the slider, and the protective cover is fixed to the slider, forming a seal with the slider. A first sealed chamber is formed, with the rear end of the needle passing through the first piston and fixed on the slider. There is a gap between the protective cover and the protective sleeve. A sealing ring is fitted on the protective cover near the rear end, forming a second sealed chamber between the sealing ring and the slider. The protective cover has a connecting hole connecting the first and second sealed chambers. The infusion tube is fixed on the protective sleeve. When the front end of the first piston passes through the blocking ring and is located outside the protective sleeve, the infusion tube communicates with the second sealed chamber. An operating rod is connected to the rear end of the protective cover, and the operating rod extends out of the rear end of the protective sleeve.

[0006] Preferably, the protective sleeve is provided with a limiting device. When the front end of the first piston passes through the blocking ring and is located outside the protective sleeve, the limiting device abuts against the rear end of the protective cover. When the piston moves back and forth, the limiting device can release its limiting effect on the protective cover.

[0007] Preferably, the protective sleeve has limit blocks on both sides, the limit blocks being right-angled triangles, the rear end of the protective cover being a plane, and the hypotenuse of the limit blocks facing the operating rod; one right-angled side of the limit block is used to abut against the rear end of the protective cover, and a connecting block is fixed to the other right-angled side of the limit block, the connecting block being right-angled triangles, one right-angled side of the connecting block being connected to the limit block, and the hypotenuse of the connecting block being perpendicular to the hypotenuse of the limit block; the protective sleeve has fixing plates on both sides, the fixing plates being located behind the limit blocks and parallel to the hypotenuse of the connecting blocks, and a sliding rod being slidably connected to the fixing plates, one end of the sliding rod passing through the fixing plates and connecting to the hypotenuse of the connecting block, the other end of the sliding rod being connected to an arc-shaped operating part, the opening of the arc-shaped operating part being forward-facing, the end not connected to the sliding rod being close to the middle of the protective sleeve, and a spring being fitted onto the portion of the sliding rod between the fixing plate and the connecting block.

[0008] Preferably, the protective sleeve is provided with needle wings near the front end.

[0009] The protective sleeve has a rearwardly extending flange at its rear end.

[0010] A handle is provided at the rear end of the control lever.

[0011] Preferably, the protective sleeve is provided with a limiting body, the limiting body being a right-angled triangle, with its hypotenuse facing the operating lever and its bottom located inside the protective sleeve; one right-angled side of the limiting body is located at its rear end, and a hinge portion is provided on the other right-angled side; a reinforcing body is provided on the protective sleeve corresponding to the hinge portion, the hinge portion being hinged to the reinforcing body, and a torsion spring is provided at the hinge position; the reinforcing body forms a bend near its front end, and the limiting body contacts the bend near its front end; triangular connecting bodies are provided on both sides of the bottom end of the protective cover, one apex of the triangular connecting body connecting to the corresponding limiting body, the connection position being located at the rear end of the hinge portion, forming a weak point; one side of the triangular connecting body corresponding to the weak point is connected to the protective cover.

[0012] Preferably, the rear end of the triangular connector is flush with the rear end of the protective cover.

[0013] Preferably, a blocking body is provided on the inner side of the protective sleeve, and the blocking body is located at the rear end of the limiting body.

[0014] Before use, the needle tip of the scalp vein needle of this invention is located inside the protective sleeve. During use, pushing the operating lever forward pushes the needle tip out of the protective sleeve. When the needle tip is pushed out, the front end of the first piston passes through the blocking ring and is located outside the protective sleeve. The annular protrusion at the rear end of the first piston abuts against the blocking ring, sealing it. Simultaneously, the sealing ring on the protective cover forms a seal against the inner wall of the sleeve and the protective cover at the rear end of the protective cover. At this time, a second sealed chamber is formed between the sealing ring and the slider. The infusion tube communicates with the second sealed chamber, and the liquid can enter the first sealed chamber through the connecting hole in the second sealed chamber, then pass through the needle tip and enter the human tissue. After use, pulling the operating lever returns the needle tip to the protective sleeve. In this structure, the infusion tube and needle tip are separate; therefore, pushing the needle forward will not pull the infusion tube, and the infusion tube is unlikely to detach and affect the use of the scalp vein needle. Attached Figure Description

[0015] Figure 1 A schematic diagram showing the structure of the scalp needle in use is shown;

[0016] Figure 2 It shows Figure 1 Enlarged view at point A;

[0017] Figure 3 It shows Figure 1 Enlarged view at point B;

[0018] Figure 4 A right view of the reinforcement is shown;

[0019] Figure 5 A schematic diagram of the original structure of the scalp needle is shown;

[0020] Figure 6 It shows Figure 5 Enlarged view at point C;

[0021] Marked in the attached diagram:

[0022] 1. Needle, 2. Protective sheath, 3. Infusion tube, 4. Slider, 5. First piston, 6. Protective cover, 7. First sealing chamber, 8. Sealing ring, 9. Second sealing chamber, 10. Connecting hole, 11. Operating rod, 12. Limiting block, 13. Connecting block, 14. Fixing plate, 15. Sliding rod, 16. Spring, 17. Needle wing, 18. Flange, 19. Handle, 20. Limiting body, 21. Blocking body, 22. Triangular connecting body;

[0023] Reinforcing body 2-1, bending 2-11, blocking ring 2-2;

[0024] Annular protrusion 5-1;

[0025] Operations section 15-1;

[0026] Hinged part 20-1. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] For examples, please refer to Figure 1 , Figure 2 and Figure 4 This embodiment provides a scalp vein needle, including a needle 1, a protective sheath 2, and an infusion tube 3. The front end of the protective sheath extends inward to form a blocking ring 2-2. A slider 4 is disposed inside the protective sheath, and a first piston 5 is fixed to the front end of the slider. The front end of the first piston can pass through the blocking ring and is located outside the protective sheath. The rear end of the first piston is provided with an annular protrusion 5-1 that cooperates with the blocking ring. When the front end of the first piston passes through the blocking ring and is located outside the protective sheath, the annular protrusion abuts against the blocking ring, forming a seal against the blocking ring. A protective cover 6 is provided at the rear end of the slider, and the protective cover is fixed to the slider and... A first sealed chamber 7 is formed between the sliders. The rear end of the needle passes through the first piston and is fixed on the slider. There is a gap between the protective cover and the protective sleeve. A sealing ring 8 is fitted on the protective cover near the rear end. A second sealed chamber 9 is formed between the sealing ring and the slider. The protective cover has a connecting hole 10 that connects the first sealed chamber and the second sealed chamber. The infusion tube is fixed on the protective sleeve. When the front end of the first piston passes through the blocking ring and is located outside the protective sleeve, the infusion tube communicates with the second sealed chamber. An operating rod 11 is connected to the rear end of the protective cover. The operating rod extends out of the rear end of the protective sleeve.

[0029] Before use, the needle tip of the aforementioned scalp vein needle is located inside the protective sheath. During use, pushing the operating lever forward pushes the needle tip out of the protective sheath. As the needle tip is pushed out, the front end of the first piston passes through the blocking ring and is located outside the protective sheath. The annular protrusion at the rear end of the first piston abuts against the blocking ring, sealing it. Simultaneously, the sealing ring on the protective cover forms a seal between the inner wall of the sheath and the protective cover at the rear end of the protective cover. At this time, a second sealed chamber is formed between the sealing ring and the slider. The infusion tube communicates with the second sealed chamber, allowing liquid to enter the first sealed chamber through the connecting hole, then through the needle tip, and finally into the human tissue. After use, pulling the operating lever returns the needle tip to the protective sheath. This structure separates the infusion tube from the needle tip; therefore, pushing the needle forward will not pull on the infusion tube, preventing it from easily detaching and affecting the use of the scalp vein needle.

[0030] For ease of operation, a needle wing 17 may be provided near the front end of the protective sleeve, and a rearwardly extending flange 18 may be provided at the rear end of the protective sleeve. A handle 19 may also be provided at the rear end of the operating lever.

[0031] In one embodiment, see Figure 2The protective sleeve has limit blocks 12 on both sides, each limit block being a right triangle. The rear end of the protective cover is a plane, and the hypotenuse of the limit block faces the operating rod. One right-angled side of the limit block is used to abut against the rear end of the protective cover, and a connecting block 13 is fixed to the other right-angled side of the limit block. The connecting block is also a right triangle, with one right-angled side connected to the limit block, and the hypotenuse of the connecting block perpendicular to the hypotenuse of the limit block. Fixing plates 14 are provided on both sides of the protective sleeve. The fixing plates are located behind the limit blocks and parallel to the hypotenuse of the connecting blocks. A sliding rod 15 is slidably connected to the fixing plate. One end of the sliding rod passes through the fixing plate and connects to the hypotenuse of the connecting block. The other end of the sliding rod is connected to an arc-shaped operating part 15-1, with the opening of the arc-shaped operating part facing forward. The end not connected to the sliding rod is close to the middle of the protective sleeve. A spring 16 is fitted onto the portion of the sliding rod between the fixing plate and the connecting block. In this structure, as the slider moves forward, it presses the inclined edge of the limiting block, causing it to move to both sides until the protective cover passes through. Then, under the action of the spring, the top surface of the limiting block abuts against the protective cover, thus limiting the protective cover. This prevents the needle from moving relative to the protective sleeve during operation by medical personnel. After use, the user's first and middle fingers pull the two arc-shaped operating parts respectively to release the limiting block from restricting the protective cover. At this time, pulling the operating rod will bring the needle into the protective sleeve. It should be noted that the above-mentioned limiting device is only a preferred embodiment. Other limiting devices can also be used, as long as they can achieve the function of the limiting device abutting against the rear end of the protective cover when the front end of the first piston passes through the blocking ring and is located outside the protective sleeve; and the limiting device can release the limiting effect on the protective cover when the piston moves back and forth.

[0032] In one embodiment, see Figure 3 and Figure 4The protective sleeve is provided with a limiting body 20, which is a right-angled triangle with its hypotenuse facing the operating lever and its bottom located inside the protective sleeve. One right-angled side of the limiting body is located at its rear end, and a hinge portion 20-1 is provided on the other right-angled side. A reinforcing body 2-1 is provided on the protective sleeve at the position corresponding to the hinge portion. The hinge portion is hinged to the reinforcing body, and a torsion spring is provided at the hinge position. The reinforcing body forms a bend 2-11 near the front end, and the limiting body near the front end... The position is in contact with the bend; a blocking body 21 is provided on the inner side of the protective sleeve, and the blocking body is located at the rear end of the limiting body. In this embodiment, the blocking body can be a blocking ring structure or a blocking block provided on the inner wall of both sides of the protective sleeve, which is not specifically limited here; a triangular connecting body 22 is provided on both sides of the bottom end of the protective cover, and one apex of the triangular connecting body is connected to the corresponding limiting body. The connection position is located at the rear end of the hinge part, and the connection position forms a weak part; one side of the triangular connecting body corresponding to the weak part is connected to the protective cover. Generally, the rear end of the triangular connecting body is flush with the rear end of the protective cover, or it can be slightly forward relative to the rear end of the protective cover. In use, the operating lever is first pushed. Due to the bending effect restricting the limiting body, the front end of the limiting body cannot rotate to either side. The weak point of the triangular connector is easily damaged. After the weak point is damaged, the protective cover moves forward and is used after being limited by the front limiting device. After use, the limiting device is released from the protective cover, and the operating lever is pulled to make the triangular connector squeeze the hypotenuse of the limiting body, thereby causing the rear end of the limiting body to rotate to both sides. After the triangular connector passes the limiting body, the rear end of the limiting body returns to its original position under the action of the torsion spring. The included angle position of the rear end is stuck between the triangular connector and the sealing ring, restricting the protective cover. Thus, as... If the connection between the limiting body and the reinforcing body is not broken, or the triangular connecting body is broken, the needle cannot be pushed forward again, preventing the disposable scalp needle from being recycled and reused. In actual use, the operating rod can also be pulled down to make the annular protrusion of the first piston located at the rear end of the limiting body. The limiting body blocks the annular protrusion in front, and the blocking body blocks the protective cover behind, thus restricting the needle inside the protective sleeve. If you want the needle to be reused forward, it needs to pass through the restrictions of the annular protrusion and the blocking body, the slider and the blocking body, the sealing ring and the blocking body, and the triangular connecting body and the blocking body, which further increases the difficulty of reusing the scalp needle.

[0033] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0034] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0035] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A scalp needle comprising a needle head (1), a protective sleeve (2) and a transfusion tube (3), characterized in that, The front end of the protective sleeve extends inward to form a blocking ring (2-2), a sliding block (4) is arranged in the protective sleeve, the front end of the sliding block is fixed with a first piston (5), the front end of the first piston can pass through the blocking ring and be located outside the protective sleeve, the rear end of the first piston is provided with an annular protrusion (5-1) matched with the blocking ring, and the annular protrusion is in abutment with the blocking ring to form a seal for the blocking ring in the state that the front end of the first piston passes through the blocking ring and is located outside the protective sleeve; The rear end of the sliding block is provided with a protective cover (6) fixed on the sliding block to form a first sealed chamber (7) between the protective cover and the sliding block, the rear end of the needle passes through the first piston and the sliding block and is fixed on the sliding block, and the protective cover is spaced from the protective sleeve; A sealing ring (8) is arranged on the protective cover and close to the rear end, a second sealed chamber (9) is formed between the sealing ring and the sliding block, the protective cover is provided with a communication hole (10) communicating the first sealed chamber and the second sealed chamber, and the infusion tube is fixed on the protective sleeve and communicates with the second sealed chamber in the state that the front end of the first piston passes through the blocking ring and is located outside the protective sleeve; The rear end of the protective cover is connected with an operating rod (11) extending out of the rear end of the protective sleeve; A limiting device is arranged on the protective sleeve and abuts against the rear end of the protective cover in the state that the front end of the first piston passes through the blocking ring and is located outside the protective sleeve; The limiting device can release the limiting action on the protective cover when the first piston moves forward and backward; Limiting blocks (12) are arranged on both sides of the protective sleeve, the limiting blocks are in the shape of right-angled triangles, the rear end of the protective cover is a plane, and the oblique edges of the limiting blocks face the operating rod; One of the right-angled edges of the limiting blocks is used to abut against the rear end of the protective cover, and a connecting block (13) is fixed on the other right-angled edge of the limiting blocks, the connecting block is in the shape of a right-angled triangle, one of the right-angled edges of the connecting block is connected with the limiting block, and the oblique edge of the connecting block is perpendicular to the oblique edge of the limiting block; Fixed plates (14) are arranged on both sides of the protective sleeve, the fixed plates are located behind the limiting blocks and are parallel to the oblique edge of the connecting block, sliding rods (15) are slidably connected to the fixed plates, one end of the sliding rod passes through the fixed plate and is connected with the oblique edge of the connecting block, the other end of the sliding rod is connected with an arc-shaped operating part (15-1), the opening of the arc-shaped operating part is forwardly arranged, one end of the sliding rod not connected with the sliding rod is close to the middle part of the protective sleeve, and springs (16) are arranged on the part of the sliding rod between the fixed plate and the connecting block.

2. A scalp needle according to claim 1, wherein A needle wing (17) is arranged on the protective sleeve close to the front end.

3. A scalp needle according to claim 1, wherein A flange (18) extending to the rear side is arranged on the rear end of the protective sleeve.

4. A scalp needle according to claim 1, wherein A handle (19) is arranged on the rear end of the operating rod.

5. A scalp needle according to any one of claims 1-4, characterized in that The protection sleeve is provided with a limiting body (20), the limiting body is in the shape of a right triangle, the hypotenuse of the limiting body is opposite to the operating rod, and the bottom is located at the inner side of the protection sleeve; One of the right angles of the limiting body is located at the rear end of the limiting body, the other right angle is provided with a hinged part (20-1), the protection sleeve is provided with a reinforcing body (2-1) at the position corresponding to the hinged part, the hinged part is hinged with the reinforcing body, and the hinged position is provided with a torsional spring; the reinforcing body is formed with a bend (2-11) near the front end, and the position near the front end of the limiting body is in contact with the bend; The bottom end of the protective cover is provided with a triangular connecting body (22) at the positions on both sides, one of the top angles of the triangular connecting body is connected with the corresponding limiting body, the connecting position is located at the rear end of the hinged part, and the connecting position forms a weak part; one side of the triangular connecting body corresponding to the weak part is connected with the protective cover.

6. A scalp needle according to claim 5, wherein The rear end of the triangular connecting body is flush with the rear end of the protective cover.

7. A dermal needle according to claim 5, wherein The inner side of the protection sleeve is provided with a blocking body (21), and the blocking body is located at the rear end of the limiting body.

Images