Safe remaining needle with rotary needle core withdrawing function

Abstract

The utility model discloses a safety remaining needle with a rotary needle core withdrawing function. The safety remaining needle comprises a catheter seat. A needle tube is arranged in the catheter seat, a needle core is arranged in the needle tube, a spiral propelling head is arranged on one side of the catheter seat, a first thread is arranged on the surface of one side of the spiral propelling head, a second thread is arranged at the position, connected with the spiral propelling head, of the catheter seat, and the first thread is in threaded connection with the second thread. A miniature bearing is arranged in the spiral propelling head, and one end of the needle core is connected with an inner ring of the miniature bearing; the spiral propelling head is arranged, the marking ring and the scales are spirally arranged, the needle core makes contact with the skin in the using process, the spiral propelling head is continuously rotated, the moving position is marked, namely the depth of the needle core making contact with the skin, the needle embedding depth can be well prevented from being too long or too short, and needle inserting and needle withdrawing are achieved through accurate control.

Description

TECHNICAL FIELD

[0001] The utility model relates to a needle structure technology, specifically relates to a safe indwelling needle of rotary needle core. BACKGROUND

[0002] Indwelling needle is very widely used in clinical work, it can reduce patient venipuncture times, reduces the vein damage, alleviates the patient's distress, also can keep patient vein passage unobstructed so as to be convenient for use in first aid, so indwelling needle puncture technology is an important nursing operation.

[0003] And in the indwitting needle puncture process, after seeing the blood, the angle is pressed low, continues to push the needle 1-2mm, then the needle core is retreated, and the operation of the needle core is difficult to control the length, too much, the front hose lacks support and is easy to fold in the blood vessel, causes pipeline blockage even breakage, too little, the needle core is still outside the hose, and when further advancing the needle, the blood vessel is easy to be punctured, causes puncture failure, therefore, a safe indwitting needle of rotary needle core is needed to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a safe indwitting needle of rotary needle core to solve the above insufficient of prior art.

[0005] In order to realize the above purpose, the utility model provides the following technical scheme:

[0006] A safe indwitting needle of rotary needle core, including catheter seat,

[0007] The inside of the catheter seat is provided with a needle tube, the inside of the needle tube is provided with a needle core, one side of the catheter seat is provided with a spiral advancing head, the surface of one side of the spiral advancing head is provided with a first screw thread, the part of the catheter seat and spiral advancing head connection is provided with a second screw thread, the first screw thread and second screw thread are screwed, the inside of the spiral advancing head is provided with a micro bearing, one end of the needle core is connected with the inner ring of micro bearing,

[0008] The outside wall of one side of the catheter seat is provided with a scale;

[0009] The spiral advancing head is provided with a mark ring.

[0010] Preferably, the inside of the catheter seat is provided with a rubber sealing plug, the needle core penetrates the rubber sealing plug and extends to the outside of the catheter seat.

[0011] Preferably, the outside of the needle core is provided with a limiting rod, and the limiting rod is located between the rubber sealing plug and the spiral advancing head.

[0012] Preferably, the catheter seat is provided with a limiting groove, and the limiting rod is slidingly connected in the inside of the limiting groove.

[0013] Preferably, the top of the catheter seat is provided with a needle wing.

[0014] Preferably, one end of the catheter seat is provided with a protective tube, which is located outside the needle tube.

[0015] Preferably, the bottom of the catheter seat is provided with a branch pipe, which is located away from the needle wing.

[0016] Preferably, the branch pipe is connected with a catheter, and the outside of the catheter is provided with a tube clamp.

[0017] Preferably, the catheter is provided with an infusion connector, which is located away from the branch pipe.

[0018] Preferably, the surface of the spiral advancing head is provided with anti-skid protrusions.

[0019] In the above technical solution, the utility model provides a kind of safety indwelling needle of rotary needle core, (1) by the spiral advancing head of being set, spiral is provided with marker ring, scale needle core contacts skin when using, continuously rotate spiral advancing head, the position of mark change is the depth of needle core contact skin, can well prevent the depth of buried needle too long or too short, by accurate control realizes needle insertion and needle withdrawal;(2) by the setting of protective protrusion, when using, medical staff's hand can be well kept from sliding, while increasing the friction between hand and spiral advancing head, facilitate the operation of medical staff. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0021] Fig. 1 The utility model provides a kind of sectional structure schematic diagram for the safety indwelling needle of rotary needle core of embodiment of the utility model.

[0022] Fig. 2 The utility model provides a kind of spiral head local amplification structure schematic diagram for the safety indwelling needle of rotary needle core of embodiment of the utility model.

[0023] Fig. 3 The utility model provides a kind of catheter seat schematic diagram for the safety indwelling needle of rotary needle core of embodiment of the utility model.

[0024] Explanation of reference signs:

[0025] 1 catheter seat, 2 protective tube, 3 needle tube, 4 needle core, 5 needle wing, 6 branch pipe, 7 catheter, 8 tube clamp, 9 infusion connector, 10 second thread, 11 first thread, 12 screw propulsion head, 13 anti-skid convex, 14 micro bearing, 15 limiting groove, 16 limiting rod, 17 rubber sealing plug, 18 scale, 19 marker ring. DETAILED DESCRIPTION

[0026] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below with the drawings.

[0027] As Figs. 1-3 shown, the utility model embodiment provides a safe type indwelling needle of rotary needle core, including catheter seat 1, the inside of catheter seat 1 is provided with needle tube 3, the inside of needle tube 3 is provided with needle core 4, one side of catheter seat 1 is provided with screw propulsion head 12, the surface of one side of screw propulsion head 12 is provided with first thread 11, the part of catheter seat 1 with screw propulsion head 12 is provided with second thread 10, first thread 11 is screwed with second thread 10, the inside of screw propulsion head 12 is provided with micro bearing 14, one end of needle core 4 is connected with the inner ring of micro bearing 14;

[0028] One side outer wall of catheter seat 1 is provided with scale 18;

[0029] Screw propulsion head 12 is provided with marker ring 19.

[0030] Specifically in the embodiment, the inside of catheter seat 1 is provided with needle tube 3, the inside of needle tube 3 is provided with needle core 4, one side of catheter seat 1 is provided with screw propulsion head 12, the surface of one side of screw propulsion head 12 is provided with first thread 11, the part of catheter seat 1 with screw propulsion head 12 is provided with second thread 10, first thread 11 is screwed with second thread 10, the inside of screw propulsion head 12 is provided with micro bearing 14, one end of needle core 4 is connected with the inner ring of micro bearing 14, welding connection, the outer ring of micro bearing 14 is welded with the inner wall of screw propulsion head 2, when using, rotate screw propulsion head 12, first thread 11 is screwed with second thread 10, in the process of continuously rotating clockwise, needle core is propelled to one side of catheter seat 1 under the action of force, in this process, the outer ring of micro bearing rotates along with the rotation of screw propulsion head, needle core does not rotate, needle core extends to the outside of needle tube 3, rotate counterclockwise, first thread 11 and the screwed part of second thread 10 are mutually principle, drive needle core 4 to separate from needle tube 3;

[0031] One side outer wall of catheter seat 1 is provided with scale 18, screw propulsion head 12 is provided with marker ring 19, when using, needle core contacts skin, continuously rotate screw propulsion head 12, the position of marker ring 19 movement is the depth of needle core 4 contacting skin, can prevent the depth of buried needle being too long or too short very well.

[0032] Preferably, the inside of the catheter seat 1 is provided with a rubber sealing plug 17, the needle core 4 penetrates the rubber sealing plug 17 and extends to the outside of the catheter seat 1; the rubber sealing plug 17 seals the catheter seat, and can well stabilize the position of the needle core 4.

[0033] Preferably, the outside of the needle core 4 is provided with a limiting rod 16, the limiting rod 16 is located between the rubber sealing plug 17 and the screw propulsion head 12; the catheter seat 1 is provided with a limiting groove 15, the limiting rod 16 is slidingly connected in the inside of the limiting groove 15.

[0034] In this embodiment, in use, the rotating propulsion head 12 is rotated, the first screw thread 11 is screwed with the second screw thread 10, in the process of continuously rotating clockwise, the needle core is pushed to one side of the catheter seat 1 under the action of force, in this process, the outer ring of the micro bearing rotates with the rotation of the screw propulsion head, the needle core remains not to rotate, the needle core extends to the outside of the needle tube 3; counterclockwise rotation, the first screw thread 11 and the second screw thread 10 screwing part mutually principle, drive the needle core 4 to separate from the needle tube 3, at this time the limiting rod slides in the inside of the limiting groove, so as to ensure the stability of the needle core 4 in the process of inserting the needle.

[0035] Preferably, the top of the catheter seat 1 is provided with a needle wing 5.

[0036] The needle wing 5 is a hand holding part, which is used for medical staff to hold and force.

[0037] Preferably, one end of the catheter seat 1 is provided with a protective tube 2, the protective tube 2 is located outside the needle tube 3.

[0038] The protective tube is sleeved outside the needle tube and the needle core, which is used for protecting the needle tube and the needle core, and avoiding the medical staff from being pricked.

[0039] Preferably, the bottom of the catheter seat 1 is provided with a branch pipe 6, the branch pipe 6 is located on the side away from the needle wing 5.

[0040] Preferably, the branch pipe 6 is connected with a catheter 7, the outside of the catheter 7 is provided with a pipe clamp 8.

[0041] Preferably, the catheter 7 is provided with an infusion connector 9, the infusion connector 9 is located at one end away from the branch pipe 6, and the prior art is not described here.

[0042] Preferably, the surface of the screw propulsion head 12 is provided with an anti-skid protrusion 13.

[0043] By setting the protective protrusion 13, the hands of the medical staff can be well prevented from slipping in use, and the friction between the hands and the screw propulsion head is increased, which is convenient for the operation of the medical staff.

[0044] Embodiment 1

[0045] A safety type indwelling needle with rotary needle core, the inside of the catheter seat 1 is provided with a needle tube 3, the inside of the needle tube 3 is provided with a needle core 4, one side of the catheter seat 1 is provided with a spiral advancing head 12, the surface of one side of the spiral advancing head 12 is provided with a first thread 11, the part where the catheter seat 1 and the spiral advancing head 12 are connected is provided with a second thread 10, the first thread 11 and the second thread 10 are screwed, the inside of the spiral advancing head 12 is provided with a micro bearing 14, one end of the needle core 4 is connected with the inner ring of the micro bearing 14, the connection is welding, the outer ring of the micro bearing 14 is welded with the inner wall of the spiral advancing head 2, when in use, the rotary advancing head 12 is rotated, the first thread 11 and the second thread 10 are screwed, in the process of continuously rotating clockwise, the needle core is pushed to one side of the catheter seat 1 under the action of force, in this process, the outer ring of the micro bearing rotates along with the rotation of the spiral advancing head, the needle core does not rotate, the needle core extends to the outside of the needle tube 3; rotate counterclockwise, the first thread 11 and the second thread 10 are screwed in the part where the principle is opposite to each other, drive the needle core 4 to separate from the needle tube 3;

[0046] The outside wall of one side of the catheter seat 1 is provided with a scale 18; the spiral advancing head 12 is provided with a mark ring 19, when in use, the needle core contacts the skin, continuously rotate the spiral advancing head 12, the position where the mark ring 19 moves is the depth where the needle core 4 contacts the skin, which can well prevent the depth of the buried needle from being too long or too short.

[0047] Example 2

[0048] The embodiment is further limited based on the embodiment 1, the inside of the catheter seat 1 is provided with a rubber sealing plug 17, the needle core 4 penetrates the rubber sealing plug 17 and extends to the outside of the catheter seat 1; the rubber sealing plug 17 seals the catheter seat, and can well stabilize the position of the needle core 4; the outside of the needle core 4 is provided with a limiting rod 16, the limiting rod 16 is located between the rubber sealing plug 17 and the screw propulsion head 12; the catheter seat 1 is provided with a limiting groove 15, the limiting rod 16 is slidingly connected in the inside of the limiting groove 15; in use, the rotating propulsion head 12 is rotated, the first screw thread 11 is screwed with the second screw thread 10, in the process of continuously rotating clockwise, the needle core is propelled to one side of the catheter seat 1 under the action of force, in this process, the outer ring of the micro bearing rotates with the rotation of the screw propulsion head, the needle core does not rotate, and the needle core extends to the outside of the needle tube 3; the rotating direction is counterclockwise, the first screw thread 11 and the second screw thread 10 are mutually separated in the screwing part, and the needle core 4 is separated from the needle tube 3, at this time, the limiting rod slides in the limiting groove, so that the stability of the needle core 4 in the needle insertion process is ensured; the top of the catheter seat 1 is provided with a needle wing 5; the needle wing 5 is a hand holding part, which is used for supporting by medical staff and a force applying part; one end of the catheter seat 1 is provided with a protective tube 2, the protective tube 2 is located outside the needle tube 3; the protective tube is sleeved outside the needle tube and the needle core, which is used for protecting the needle tube and the needle core and avoiding the medical staff from being pricked; the bottom of the catheter seat 1 is provided with a branch pipe 6, the branch pipe 6 is located on the side away from the needle wing 5; the branch pipe 6 is connected with a catheter 7, the outside of the catheter 7 is provided with a pipe clamp 8; the catheter 7 is provided with an infusion connector 9, the infusion connector 9 is located at the end away from the branch pipe 6, and the prior art is not described one by one; the surface of the screw propulsion head 12 is provided with anti-skid protrusions 13; the anti-skid protrusions 13 can well keep the hands of the medical staff from sliding in use, and increase the friction force between the hands and the screw propulsion head, so that the operation of the medical staff is facilitated.

[0049] The above only describes some exemplary embodiments of the utility model in a manner of description, without doubt, for ordinary skilled person in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature, and should not be understood as limiting the protection scope of the utility model claims.

Claims

1. A safety type indwelling needle of a rotary needle core withdrawal, characterized in that, The catheter seat (1) is provided with a needle tube (3) inside, the needle tube (3) is provided with a needle core (4) inside, one side of the catheter seat (1) is provided with a spiral propelling head (12), the surface of one side of the spiral propelling head (12) is provided with a first thread (11), the part where the catheter seat (1) is connected with the spiral propelling head (12) is provided with a second thread (10), the first thread (11) is screwed with the second thread (10), the inside of the spiral propelling head (12) is provided with a micro bearing (14), one end of the needle core (4) is connected with the inner ring of the micro bearing (14). One side of the outer wall of the catheter seat (1) is provided with a scale (18). The spiral propelling head (12) is provided with a marker ring (19). The inside of the catheter seat (1) is provided with a rubber sealing plug (17), the needle core (4) penetrates through the rubber sealing plug (17) and extends to the outside of the catheter seat (1).

2. The safety type indwelling needle with a rotary needle withdrawal core according to claim 1, wherein The outside of the needle core (4) is provided with a limiting rod (16), the limiting rod (16) is located between the rubber sealing plug (17) and the spiral propelling head (12).

3. The safety type indwelling needle with a rotary needle withdrawal core according to claim 2, characterized in that, The catheter seat (1) is provided with a limiting groove (15), the limiting rod (16) is slidingly connected inside the limiting groove (15).

4. The safety type indwelling needle with a rotary needle withdrawal core according to claim 3, characterized in that, The top of the catheter seat (1) is provided with a needle wing (5).

5. The safety type indwelling needle with a rotary needle withdrawal core according to claim 1, wherein One end of the catheter seat (1) is provided with a protective tube (2), the protective tube (2) is located outside the needle tube (3).

6. The safety type indwelling needle with a rotary needle withdrawal core according to claim 1, wherein The bottom of the catheter seat (1) is provided with a branch pipe (6), the branch pipe (6) is located on the side away from the needle wing (5).

7. The safety type needle retention device of claim 5 wherein: The branch pipe (6) is connected with a catheter (7), the outside of the catheter (7) is provided with a pipe clamp (8).

8. The safety type needle retention device of claim 7 wherein, The catheter (7) is provided with an infusion connector (9), the infusion connector (9) is located at the end away from the branch pipe (6).

9. The safety-type retention needle of claim 8 wherein, The surface of the spiral propelling head (12) is provided with an anti-skid convex (13).

10. The safety-type indwelling needle with a rotary needle withdrawal core according to claim 1, wherein ​

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