A needle structure

Abstract

This utility model discloses an indwelling needle structure, including a catheter body and a sleeve body fitted onto the catheter body. The catheter body includes an integrally formed head and tail portion, with the tail portion gradually widening from the end near the head to the end away from the head. The sleeve body includes a coaxially arranged tail sleeve, middle sleeve, and head sleeve, with the middle sleeve gradually narrowing from the end near the tail sleeve to the end near the head sleeve. The tail portion is fitted inside the middle sleeve, and the head portion extends from the head sleeve to the outside of the head sleeve. This utility model directly glues the integrally formed catheter body and sleeve body together, eliminating the need for rivets, improving the tightness of the connection, reducing accessories, lowering costs, and improving stability in use.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an indwelling needle structure. Background Technology

[0002] Indwelling needles are a common medical device used to establish a long-term intravenous infusion channel in patients for short or medium term (usually 3-7 days). Currently, the catheter and catheter sleeve in indwelling needles are connected by rivets. This type of structure has a complicated assembly process, and the multi-part splicing mode can cause leakage, affecting the effectiveness of use. Utility Model Content

[0003] This invention provides a rivetless indwelling needle structure to overcome the shortcomings of existing technologies.

[0004] The present invention solves the technical problem by adopting the following technical solution: an indwelling needle structure, comprising a catheter body and a sleeve body fitted onto the catheter body;

[0005] The catheter body includes an integrally formed tube head and tube tail, and the tube tail gradually widens from the end near the tube head to the end away from the tube head.

[0006] The tube sleeve includes a tail sleeve, a middle sleeve, and a head sleeve arranged coaxially. The middle sleeve gradually narrows from one end near the tail sleeve to the other end near the head sleeve. The tail sleeve is fitted inside the middle sleeve, and the head sleeve extends out from the head sleeve to the outside of the head sleeve.

[0007] In several embodiments, a limiting end is coaxially provided below the tail of the tube, and the limiting end is located inside the tail sleeve and cannot be inserted into the middle sleeve.

[0008] In several embodiments, at least one protruding edge is provided on the outer wall of the tube tail, the protruding edge extending from the upper end face of the tube tail to the lower end face of the tube tail.

[0009] In several embodiments, the centerline of the convex edge and the axis of the tube tail are located on the same plane.

[0010] In several embodiments, the inner wall of the middle sleeve is provided with an inwardly recessed groove for the insertion of a convex edge.

[0011] In several embodiments, a positioning ring is provided around the entire body of the headgear.

[0012] In several embodiments, a branch pipe is connected to one side of the sleeve body.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention uses an integrally molded conduit body and sleeve body to be directly glued together, eliminating the need for rivets, improving the tightness of the connection, reducing accessories, lowering costs, and improving the stability of use. Attached Figure Description

[0015] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of this invention.

[0016] Figure 1 This is a schematic diagram of the overall structure of the indwelling needle in Example 1;

[0017] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0018] Figure 3 This is a schematic cross-sectional view of the sleeve body in Example 2;

[0019] Figure 4 This is a schematic diagram of the catheter body in Example 2;

[0020] Figure 5 This is a schematic diagram of the overall structure of the indwelling needle in Example 3. Detailed Implementation

[0021] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figures 1-2 As shown, the indwelling needle structure provided in this embodiment mainly includes a transparent catheter body 10 and a sleeve body 20 sleeved on the catheter body 10, with the needle tip inserted into the catheter body 10.

[0025] The catheter body 10 includes an integrally formed tube head 11, tube tail 12, and limiting end 13. The inner diameter of the tube tail 12 gradually expands from the end near the tube head 11 to the end away from the tube head 11, forming a frustum-shaped structure. The limiting end 13 is annular. The three are coaxially arranged.

[0026] Furthermore, the tube sleeve 20 includes a tail sleeve 21, a middle sleeve 22, and a head sleeve 23 arranged coaxially, which can be integrally formed. The inner diameter of the middle sleeve 22 gradually decreases from the end near the tail sleeve 21 to the end near the head sleeve 23, thus forming a frustum-shaped structure. The tail sleeve 12 is fitted inside the middle sleeve 22, and the head sleeve 11 extends from the head sleeve 23 to the outside of the head sleeve 23. The limiting end 13 is located inside the tail sleeve 21 and cannot be inserted into the middle sleeve 22.

[0027] Furthermore, a positioning ring 231 is provided around the headgear 23.

[0028] Here, the conduit body 10 and the sleeve body 20 are in close contact and can be fixedly connected by adhesive or by ultrasonic welding.

[0029] Furthermore, a branch pipe 30 is connected to one side of the sleeve body 20, forming a tee structure.

[0030] Example 2

[0031] like Figures 3-4 As shown, in this embodiment, two elongated protruding edges 121 are provided on the outer wall of the tube tail 12. The protruding edges 121 extend from the upper end face of the tube tail 12 to the lower end face of the tube tail 12. The center line of the protruding edges 121 and the axis of the tube tail 12 are located on the same plane, and the two protruding edges 121 are symmetrically arranged. The height of the protruding edges 121 is about 1-2 mm. Correspondingly, an inwardly recessed groove 221 is provided on the inner wall of the middle sleeve 22. Similarly, there are two grooves 221, and their positions and shapes correspond to the protruding edges 121. The grooves 221 allow the protruding edges 121 to be inserted, providing positioning and support. At the same time, applying adhesive to the grooves 221 can improve the bonding and fixing effect.

[0032] Example 3

[0033] like Figure 5 As shown, in this embodiment, only the conduit body 10 and the sleeve body 20 are used to form a straight cylindrical structure, which is different from the three-way structure in Embodiment 1.

[0034] All descriptions herein may be presented in any suitable order. Any and all instances used, or exemplary language provided herein (such as "for example"), are merely for the purpose of better illustrating the invention and are not intended to limit the scope of the invention, except as provided in the claims. The language used in the detailed description should not be construed as indicating any essential elements for practicing the invention beyond the claims.

[0035] This invention includes all improvements encompassed by the spirit and scope of the invention as defined in the claims. Furthermore, unless otherwise stated or there is a clear contradiction in the content, this invention includes any of the foregoing elements and all possible variations thereof.

Claims

1. A structure for an indwelling needle, characterized in that, Includes a catheter body (10) and a sleeve body (20) fitted onto the catheter body (10); The catheter body (10) includes an integrally formed tube head (11) and tube tail (12), and the tube tail (12) gradually expands from the end near the tube head (11) to the end away from the tube head (11). The tube sleeve (20) includes a tail sleeve (21), a middle sleeve (22) and a head sleeve (23) arranged coaxially. The middle sleeve (22) gradually narrows from one end near the tail sleeve (21) to the other end near the head sleeve (23). The tail sleeve (12) is fitted inside the middle sleeve (22), and the head sleeve (11) extends from the head sleeve (23) to the outside of the head sleeve (23).

2. A needle retention structure as defined in claim 1, wherein A limiting end (13) is coaxially provided below the tail section (12) of the tube. The limiting end (13) is located inside the tail sleeve (21) and cannot be inserted into the middle sleeve (22).

3. The indwelling needle structure according to claim 1, characterized in that, At least one protruding edge (121) is provided on the outer wall of the tail section (12), and the protruding edge (121) extends from the upper end face of the tail section (12) to the lower end face of the tail section (12).

4. The indwelling needle structure according to claim 3, characterized in that, The centerline of the convex edge (121) and the axis of the tube tail (12) are located on the same plane.

5. The indwelling needle structure according to claim 3, characterized in that, The inner wall of the middle sleeve (22) is provided with an inwardly recessed groove (221) for the protruding edge (121) to be inserted.

6. The indwelling needle structure according to claim 1, characterized in that, The headgear (23) is surrounded by a positioning ring (231).

7. The indwelling needle structure according to claim 1, characterized in that, A branch pipe (30) is connected to one side of the sleeve body (20).

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