Pressing springback type remaining needle

Abstract

The utility model discloses a pressing springback type remaining needle which comprises a three-way shell, a needle core, a needle tube, a springback assembly, an isolation plug, a side cover and a top cover. The infusion tube is arranged on one side of the three-way shell, the isolation plug is arranged in the three-way shell, the side cover is connected to the outer side of the top cover in a sliding mode, one end of the needle core is fixed to the top cover, the other end of the needle core sequentially penetrates through the isolation plug, the three-way shell and the needle tube, the movable end of the rebound assembly is connected with the top end of the needle core, and the side cover makes contact with the trigger end of the rebound assembly. The rebounding assembly used for driving the needle core to move up and down is arranged on the top cover, after the indwelling needle is successfully punctured, the rebounding assembly can drive the needle core to rebound only by pressing the side cover, the difficulty of needle pushing operation is lowered, puncture failure caused by improper manipulation during manual needle core withdrawing is avoided, the success rate of puncture is remarkably increased, and after the needle core rebounds, the needle core is prevented from being damaged. The whole puncture process can be completed by separating the top cover from the three-way shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to a remaining needle structure technical field especially, it relates to a press rebound formula remaining needle. BACKGROUND

[0002] In clinical nursing practice, the puncture of remaining needle is a common and important operation, which is particularly important for patients who need continuous or multiple intravenous infusion. Since the basic steps of remaining needle puncture include selecting a suitable puncture vein, tying a tourniquet, tightening the skin, inserting a needle, continuing to insert a needle to ensure that the hose enters the blood vessel after seeing back blood, withdrawing the needle core to send the hose, fixing, etc. Among them, single-handed puncture operation can reduce the action of hand changing, facilitate the blood vessel to keep fixed and straight state, and the adjustment range of the method is small, the needle holding method is most suitable for the selection of needle insertion angle, and then a good puncture effect is obtained. However, in actual operation, some nurses are not used to single-handed operation, which leads to problems in the process of needle core back-off, and thus causes puncture failure. SUMMARY

[0003] The utility model discloses a press rebound formula remaining needle to solve one or more technical problems in the above background technical field.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] A press rebound formula remaining needle, including three -way casing, needle core, needle tube, rebound assembly, isolation plug, side cover and top cap, one side of three -way casing is equipped with the infusion pipe for with the hose meets, the isolation plug is located in three -way casing, the needle tube is equipped at the bottom of three -way casing, the top cap is equipped at the top of three -way casing, the side cover sliding connection is in the outside of top cap, one end of needle core is fixed to top cap, the other end of needle core passes in order isolation plug, three -way casing and needle tube, the rebound assembly is located in top cap, the movable end of rebound assembly is connected with the top end of needle core, the side cover with the trigger end of rebound assembly meets contact;

[0006] When the bottom end of needle core rebounds to the needle tube, the side cover and the top cap are relative to move, the rebound assembly drives needle core to move along the direction close to the top cap, and the bottom end of needle core rebounds to the needle tube.

[0007] Preferably, the rebound assembly comprises a horizontal moving stopper, a rebound spring and a needle seat, the horizontal moving stopper is slidably arranged in the top cover, the top end of the needle core is fixed on the needle seat, the rebound spring is arranged between the needle seat and the top cover, the side cover cooperates with the horizontal moving stopper, and the horizontal moving stopper cooperates with the needle seat; when the side cover moves relative to the top cover, the horizontal moving stopper moves left and right, and simultaneously drives the needle seat to move up and down.

[0008] Preferably, the bottom of the top cover is provided with a first connecting hook, the top of the needle seat is provided with a second connecting hook, the rebound spring is a tension spring, and the two ends of the tension spring are connected with the first connecting hook and the second connecting hook respectively; in the initial state, the tension spring is in a tension state.

[0009] Preferably, the horizontal moving stopper is provided with a rebound channel penetrating up and down, the rebound channel is matched with the shape of the needle seat, one side of the horizontal moving stopper is provided with a top block, the first reset spring is arranged on the other side of the horizontal moving stopper, one side of the top cover is provided with a limiting hole, the top block corresponds to the limiting hole, the inner side of the side cover is provided with a limiting block, the limiting block is opposite to the limiting hole left and right, the top block abuts against the limiting block, one side of the top block is provided with a first inclined wedge part, and the bottom of the first inclined wedge part is provided with a stop part.

[0010] Preferably, the bottom of the rebound channel is provided with a second inclined wedge part, the top of the needle seat is provided with a third inclined wedge part, and the second inclined wedge part is in contact with the third inclined wedge part.

[0011] Preferably, the other side of the horizontal moving stopper is provided with a first connecting column, the inner side of the top cover is provided with a second connecting column, and the two ends of the first reset spring are sleeved on the first connecting column and the second connecting column respectively.

[0012] Preferably, the second reset spring is further arranged, and the two ends of the second reset spring abut against the limiting block and the top of the three-way shell respectively.

[0013] Preferably, the bottom of the top cover is provided with a connecting plug, the connecting plug extends into the three-way shell from the top of the three-way shell, and the outer side of the connecting plug is attached to the inner wall of the three-way shell.

[0014] The utility model discloses a beneficial effect is: through setting up the rebound assembly for driving needle core up and down in the top cover, after the indwelling needle puncture succeeds, only need press the side cover, can make the rebound of rebound assembly drive needle core, reduced the difficulty of needle operation, avoided the puncture failure caused by improper technique when manual needle core, significantly improved the success rate of puncture, after needle core rebound, through making the top cover separate from the three -way shell, can complete the whole puncture process. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings further illustrate the present application, but do not constitute any limitation on the present application.

[0016] Figure 1 is a schematic diagram of the overall structure of one embodiment of the present application;

[0017] Figure 2 is a schematic diagram of the internal structure of one embodiment of the present application;

[0018] Figure 3 is a partial enlarged schematic diagram of Figure 2

[0019] Wherein: three-way shell 1, needle core 2, needle tube 3, rebound assembly 4, isolation plug 5, side cover 6, top cover 7, infusion tube 8, horizontal moving stop block 41, rebound spring 42, needle seat 21, first connecting hook 71, second connecting hook 211, first reset spring 43, rebound channel 411, top block 412, limiting hole 72, limiting block 61, first inclined wedge part 413, stop part 414, second inclined wedge part 415, third inclined wedge part 211, first connecting column 416, second connecting column 73, second reset spring 9, connecting plug 74. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be further described below in combination with the drawings and through specific embodiments.

[0021] The press rebound type indwelling needle of the present embodiment, with reference to the accompanying drawings Figures 1-3 , comprises three-way shell 1, needle core 2, needle tube 3, rebound assembly 4, isolation plug 5, side cover 6 and top cover 7; one side of the three-way shell 1 is provided with an infusion tube 8 for connecting with a hose, the isolation plug 5 is arranged in the three-way shell 1, the needle tube 3 is arranged at the bottom end of the three-way shell 1, the top cover 7 is arranged at the top end of the three-way shell 1, the side cover 6 is slidingly connected to the outside of the top cover 7, one end of the needle core 2 is fixed to the top cover 7, the other end of the needle core 2 passes through the isolation plug 5, the three-way shell 1 and the needle tube 3 in sequence, the rebound assembly 4 is arranged in the top cover 7, the movable end of the rebound assembly 4 is connected with the top end of the needle core 2, the side cover 6 is arranged outside the top cover 7, and the side cover 6 is in contact with the trigger end of the rebound assembly 4;

[0022] In the initial state, the bottom end of the needle core 2 protrudes out of the needle tube 3; when the side cover 6 and the top cover 7 move relatively, the rebound assembly 4 drives the needle core 2 to move in the direction of approaching the top cover 7, so that the bottom end of the needle core 2 rebounds into the needle tube 3.

[0023] ​By setting the rebound assembly 4 for driving the needle core 2 to move up and down in the top cover 7, after the indwelling needle puncture is successful, only the side cover 6 needs to be pressed to make the rebound assembly 4 drive the needle core 2 to rebound, which reduces the difficulty of the needle pushing operation, avoids the puncture failure caused by improper manual needle core 2 withdrawal, and significantly improves the puncture success rate. After the needle core 2 rebounds, the top cover 7 is separated from the three-way shell 1, the side cover 6, the rebound assembly 4 and the needle core 2 are driven to exit the three-way shell 1, and the whole puncture process is completed.

[0024] Preferably, the rebound assembly 4 comprises a horizontal moving block 41, a rebound spring 42 and a needle seat 21, the horizontal moving block 41 is slidably arranged in the top cover 7, the top end of the needle core 2 is fixed on the needle seat 21, the rebound spring 42 is arranged between the needle seat 21 and the top cover 7, the side cover 6 cooperates with the horizontal moving block 41, and the horizontal moving block 41 cooperates with the needle seat 21; when the side cover 6 moves relative to the top cover 7, the horizontal moving block 41 moves left and right, and simultaneously drives the needle seat 21 to move up and down.

[0025] By setting the horizontal moving block 41 slidably arranged in the top cover 7, and the side cover 6 cooperating with the horizontal moving block 41, the up and down movement of the side cover 6 is converted into horizontal movement, so that when the side cover 6 moves relative to the top cover 7, the horizontal moving block 41 moves left and right. The rebound spring 42 is arranged between the needle seat 21 and the top cover 7, which provides rebound force to the needle seat 21, so that the needle seat 21 and the needle core 2 maintain the tendency to move towards the top cover 7. The needle seat 21 is used for fixing the needle core 2, which increases the contact area between the end of the needle core 2 and the horizontal moving block 41, and ensures the reliability of the rebound action of the needle core 2.

[0026] Preferably, the bottom of the top cover 7 is provided with a first connecting hook 71, the top of the needle seat 21 is provided with a second connecting hook 211, the rebound spring 42 is a tension spring, and the two ends of the tension spring are connected with the first connecting hook 71 and the second connecting hook 211 respectively. In the initial state, the tension spring is in tension. By setting the first connecting hook 71 at the bottom of the top cover 7 and the second connecting hook 211 at the top of the needle seat 21, the rebound spring 42 is fixed; under the pulling of the first connecting hook 71 and the second connecting hook 211, the tension spring is in tension, so that the needle seat 21 and the needle core 2 maintain the tendency to move towards the top cover 7, and the needle seat 21 immediately retreats when the position of the horizontal moving block 41 changes.

[0027] Preferably, the first reset spring 43 is further included, the horizontal moving block 41 is provided with a rebound channel 411 passing through up and down, the rebound channel 411 is matched with the shape of the needle seat 21, one side of the horizontal moving block 41 is provided with a top block 412, the first reset spring 43 is arranged on the other side of the horizontal moving block 41, one side of the top cover 7 is provided with a limiting hole 72, the top block 412 corresponds to the limiting hole 72, the inner side of the side cover 6 is provided with a limiting block 61, the limiting block 61 is opposite to the limiting hole 72, the top block 412 abuts against the limiting block 61, one side of the top block 412 is provided with a first inclined wedge part 413, and the bottom of the first inclined wedge part 413 is provided with a stop part 414.

[0028] By arranging the top block 412 and the first reset spring 43 on both sides of the horizontal moving block 41, the limiting hole 72 is arranged on one side of the top cover 7, and the limiting block 61 is arranged on the inner side of the side cover 6, in the initial state, the limiting block 61 is opposite to the limiting hole 72, and the end of the top block 412 is located in the limiting hole 72 and contacts the limiting block 61; when the side cover 6 is pressed, the limiting block 61 is driven by the side cover 6 to be staggered up and down with the limiting hole 72, at this time, the horizontal moving block 41 is driven by the first reset spring 43 to move to the limiting hole 72, so that the top block 412 extends into the limiting hole 72, and the horizontal moving of the horizontal moving block 41 is realized. The horizontal moving block 41 is provided with the rebound channel 411 passing through up and down and matched with the shape of the needle seat 21, when the horizontal moving block 41 moves left and right, the needle seat 21 slides up and down in the rebound channel 411 under the action of the rebound spring 42, so as to drive the needle core 2 to extend or retract. One side of the top block 412 is further provided with the first inclined wedge part 413, the top block 412 is in sliding fit with the limiting block 61 through the first inclined wedge part 413, so that the rebound speed of the needle core 2 is controllable. The bottom of the first inclined wedge part is provided with the stop part 414, when the needle core 2 rebounds, the stop part 414 extends out of the limiting hole 72 and abuts against one end of the limiting block 61, so that the side cover 6 cannot be reset, and it is ensured that the needle core 2 cannot extend again after rebounding, and the use safety is ensured.

[0029] Preferably, the bottom of the rebound channel 411 is provided with a second inclined wedge part 415, the top of the needle seat 21 is provided with a third inclined wedge part 211, and the second inclined wedge part 415 contacts the third inclined wedge part 211. By arranging the second inclined wedge part 415 and the third inclined wedge part 211, the second inclined wedge part 415 and the third inclined wedge part 211 are kept in contact, so that when the horizontal moving block 41 moves left and right, the needle seat 21 can slide up and down in the rebound channel 411 more smoothly, and the rebound of the needle core 2 is more reliable.

[0030] Preferably, the other side of the transverse block 41 is provided with a first connecting column 416, the inner side of the top cover 7 is provided with a second connecting column 73, and the two ends of the first reset spring 43 are sleeved on the first connecting column 416 and the second connecting column 73 respectively. By arranging the first connecting column 416 and the second connecting column 73, the two ends of the first reset spring 43 are fixed, and the force provided by the first reset spring 43 is ensured to act on the other side of the transverse block 41.

[0031] Preferably, the second reset spring 9 is further arranged, and the two ends of the second reset spring 9 abut against the limiting block 61 and the top of the three-way shell 1 respectively. By arranging the second reset spring 9 between the bottom of the three-way shell 1 and the limiting block 61 of the side cover 6, the elastic force generated by the compression of the second reset spring 9 acts on the side cover 6, so that the movement of the side cover 6 is avoided when no external force is applied.

[0032] Preferably, the bottom of the top cover 7 is provided with a connecting plug 74, the connecting plug 74 extends into the three-way shell 1 from the top of the three-way shell 1, and the outer side of the connecting plug 74 is attached to the inner wall of the three-way shell 1. By matching the connecting plug 74 with the inner wall of the three-way shell 1, the detachable connection between the top cover 7 and the three-way shell 1 is realized. When the puncture of the indwelling needle is completed, the top cover 7, the side cover 6, the rebound assembly 4, the needle seat 21 and the needle core 2 can be separated from the three-way shell 1 by pulling out the connecting plug 74.

[0033] The working principle of the indwelling needle of the embodiment is as follows: in the initial state, the needle core 2 extends out of the needle tube 3, and the limiting block 61, the limiting hole 72 and the top block 412 are opposite to each other. When puncturing, the medical staff holds the three-way shell 1 to puncture the needle core 2 to the puncture site of the patient; after the puncture of the needle core 2 is completed, the side cover 6 is pressed to make the limiting block 61 and the limiting hole 72 staggered up and down, the transverse block 41 moves to the limiting hole 72 under the pushing of the first reset spring 43, the top block 412 extends into the limiting hole 72, and the needle seat 21 slides upward in the rebound channel 411 under the action of the rebound spring 42, so as to drive the rebound of the needle core 2; after the rebound of the needle core 2, the top cover 7 is pulled out to separate the top cover 7, the side cover 6, the rebound assembly 4, the needle seat 21 and the needle core 2 from the three-way shell 1, and the whole puncture process of the indwelling needle is completed.

[0034] The technical principle of the utility model is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanation herein, other specific embodiments of the utility model can be conceived by those skilled in the art without creative labor, and these embodiments will fall within the protection scope of the utility model.

Claims

1. A press-and-rebound indwelling needle characterized by comprising: The utility model provides a kind of three-way shell, needle core, needle tube, rebound assembly, isolation plug, side cover and top cover;The side of the three-way shell is equipped with infusion tube for being connected with hose, the isolation plug is arranged in the three-way shell, the needle tube is arranged at the bottom end of the three-way shell, the top cover is arranged at the top end of the three-way shell, the side cover is slidably connected to the outside of the top cover, one end of the needle core is fixed to top cover, the other end of the needle core sequentially passes through the isolation plug, the three-way shell and the needle tube, the rebound assembly is arranged in the top cover, the movable end of the rebound assembly is connected with the top end of the needle core, the side cover is contacted with the trigger end of the rebound assembly. In initial state, the bottom end of the needle core is stretched out of the needle tube;When the side cover and the top cover relatively move, the rebound assembly drives the needle core to move along the direction of approaching the top cover, so that the bottom end of the needle core rebounds into the needle tube.

2. The press-and-rebound indwelling needle according to claim 1, wherein The rebound assembly includes horizontal shift stop block, rebound spring and needle seat, the horizontal shift stop block is slidably arranged in the top cover, the top end of the needle core is fixed on the needle seat, the rebound spring is arranged between the needle seat and the top cover, the side cover is matched with the horizontal shift stop block, and the horizontal shift stop block is matched with the needle seat;When the side cover and the top cover relatively move, the horizontal shift stop block moves left and right, and simultaneously drives the needle seat to move up and down.

3. The press-and-rebound indwelling needle according to claim 2, wherein The bottom of the top cover is provided with a first connecting hook, the top of the needle seat is provided with a second connecting hook, the rebound spring is a tension spring, and the two ends of the tension spring are respectively connected with the first connecting hook and the second connecting hook.

4. The press-and-rebound indwelling needle according to claim 2, wherein The utility model also includes a first return spring, the horizontal shift stop block is provided with a rebound channel penetrating up and down, the rebound channel is matched with the shape of the needle seat, one side of the horizontal shift stop block is provided with a top block, the first return spring is arranged on the other side of the horizontal shift stop block, one side of the top cover is provided with a limiting hole, the top block corresponds to the limiting hole, the inside of the side cover is provided with a limiting block, the limiting block is left and right opposite to the limiting hole, the top block is abutted with the limiting block, one side of the top block is provided with a first inclined wedge part, and the bottom of the first inclined wedge part is provided with a stop part.

5. The press-and-rebound indwelling needle according to claim 4, wherein The bottom of the rebound channel is provided with a second inclined wedge part, the top of the needle seat is provided with a third inclined wedge part, and the second inclined wedge part is contacted with the third inclined wedge part.

6. The press-and-rebound indwelling needle of claim 4, wherein The other side of the horizontal shift stop block is provided with a first connecting column, the inside of the top cover is provided with a second connecting column, and the two ends of the first return spring are respectively sleeved on the first connecting column and the second connecting column.

7. The press-and-rebound indwelling needle according to claim 4, wherein The utility model also includes a second return spring, and the two ends of the second return spring are respectively abutted with the limiting block and the top of the three-way shell.

8. The press-and-rebound indwelling needle of claim 1, wherein, The bottom of the top cover is provided with a connecting plug, the connecting plug is stretched into the three-way shell from the top of the three-way shell, and the outside of the connecting plug is matched with the inner wall of the three-way shell.

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