CN219878845U - Remaining needle - Google Patents

Abstract

The utility model relates to the field of medical instruments, in particular to an indwelling needle, which aims to solve the problem that an exposed needle core is easy to cause cross infection; the technical scheme provided by the utility model comprises a medical tube and a needle core penetrating through the medical tube, wherein a tube shell is arranged on the medical tube, a needle shell is arranged on the needle core, and the needle shell is detachably connected with the tube shell; the needle shell is slidably provided with a base connected with the needle core, the needle core is sleeved with a deformation tube, the deformation tube is positioned between the base and the inner wall of the needle shell, and the base is provided with a reset component for controlling the compression reset of the deformation tube; the bottom of needle shell is provided with the groove of predetermineeing, and the clearance is provided with the screens ring in the groove of predetermineeing, has offered the screens annular that supplies the screens ring to insert on the periphery lateral wall of base tail end and establish. The proposal provided by the utility model has the advantage of reducing the occurrence of cross infection after the needle core of the indwelling needle is extracted from the medical tube.

Description

Remaining needle

Technical Field

The utility model relates to the field of medical instruments, in particular to an indwelling needle.

Background

The existing multiple injection of medicaments or fluid infusion into the arterial and venous vessels of the human body adopts an indwelling needle which is divided into a Y type and a straight type; the basic principle is that a medical tube is sleeved on a retention needle core, the medical tube is made of a special grade material, is thin and soft, can be penetrated into a blood vessel along with the retention needle core, and then the medical tube is retained in the blood vessel, and the retention needle core is withdrawn; the indwelling needle can repeatedly administer the medicine to the patient at any time.

The general indwelling needle is used as a disposable material, and before use, an outer shell is sleeved on the indwelling needle core and the medical tube; when the medical care needle is used, medical care personnel take down the shell, and when the remaining needle core is withdrawn, the medical care personnel generally need to pick up the shell again to be sleeved on the remaining needle core and then treat the shell as medical waste.

However, since the outer shell is adapted to the housing at the medical tube, the outer shell is easily dropped over the housing at the otherwise non-adapted needle core, thereby exposing the needle core and causing cross-contamination of the exposed needle core.

Disclosure of Invention

In order to reduce the occurrence of cross infection after the needle core of the indwelling needle is pulled out of the medical tube, the utility model provides the indwelling needle.

The utility model provides an indwelling needle which adopts the following technical scheme:

the indwelling needle comprises a medical tube and a needle core penetrating through the medical tube, wherein a tube shell is arranged on the medical tube, a needle shell is arranged on the needle core, and the needle shell is detachably connected with the tube shell; the needle shell is slidably provided with a base connected with the needle core, a deformation tube is sleeved on the base, the deformation tube is positioned between the tail part of the base and the inner wall of the needle shell, and a reset component for controlling the compression reset of the deformation tube is arranged on the base; the bottom of needle shell is provided with predetermineeing the groove, predetermineeing the inslot clearance and being provided with the screens ring, set up the screens annular that supplies the screens ring to insert on the periphery lateral wall of base tail end.

By adopting the technical scheme, when in use, medical staff inserts the needle core and the medical tube into a blood vessel of a patient together, then pulls out the needle core from the medical tube, and separates the tube shell from the needle shell; at the moment, the resetting component resets the compressed deformation tube, the thrust force generated during resetting the deformation tube moves the base to the direction away from the tube shell, and finally the needle core is completely retracted into the tube shell; at this time, the clamping ring is also clamped in the clamping ring groove; at this time, through the cooperation of reset subassembly and deformation pipe, screens ring and screens annular setting, make the nook closing member can stably retract to the needle shell in automatically, reduced the nook closing member that exposes and caused cross infection's condition to take place.

Optionally, the reset component comprises a reset connecting rod, a reset block and a reset slide block, wherein the reset connecting rod is connected with the reset block, a reset hole is formed in the outer wall of the needle shell, a buffer chute and a sliding straight groove are formed in the inner wall of the needle shell, and the reset hole, the buffer chute and the sliding straight groove are communicated and are sequentially arranged; the reset block is inserted in the reset hole and can slide along the buffer chute and the sliding straight chute, and the reset slide block is arranged above the reset hole so as to press the reset block.

Through adopting above-mentioned technical scheme, the slider that resets is pressed downwards, and the reset piece reentrant needle shell is from reset hole in, and the reset piece loses the restriction of needle shell lateral wall this moment, and the deformation thrust of deformation pipe makes the reset piece get into in the buffering chute, and the reset piece lasts the tank bottom friction with the buffering chute this moment, and when the reset piece got into and slides straight flute, only by the thrust continuation motion of deformation pipe after losing the friction of buffering chute, finally the needle core is retracted to in the passageway of sliding completely.

Optionally, be provided with spacing platform on the needle shell is located the lateral wall in hole that resets, reset slider's a part is set up on spacing bench, reset slider's lateral wall is connected with reset semi-ring, reset semi-ring slip cover is established on the needle shell, the one end that the needle shell is close to reset semi-ring is provided with the breach of stepping down, the breach of stepping down communicates with the hole that resets, the notch of stepping down supplies reset slider deformation to press the reset block.

By adopting the technical scheme, the reset slide block moves towards the direction close to the tube shell, and after the reset slide block is separated from the limit of the limit table, the reset slide block is pressed downwards so as to realize the pressing of the reset slide block on the reset block, the reset block can smoothly enter the needle shell, and finally the needle core is brought back to the needle tube under the thrust of the deformation tube; the deformation tube can be reset through the action of sliding forwards and pressing downwards, so that the situation that the indwelling needle is scrapped due to retraction of the needle core after the indwelling needle is touched by mistake is reduced.

Optionally, the cross-section of spacing platform is right trapezoid, the acute angle limit of spacing platform is close to the reset piece, the acute angle limit of spacing platform matches with the recess of reset piece and reset link junction.

Through adopting above-mentioned technical scheme, spacing platform is pasted with the piece that resets this moment, and spacing platform acute angle limit has increased the self-locking force of piece that resets.

Optionally, one end of the base, which is close to the direction of the clamping ring, is conical.

By adopting the technical scheme, the end part of the base is set to be a conical surface, so that the base can be smoothly inserted into the clamping ring in the moving process.

Optionally, the one end that the needle shell is close to the tube shell is provided with a plurality of anti-shake strips, the end wall that the tube shell is close to the needle shell direction has been seted up and has been used for preventing shaking the strip and insert the anti-shake breach of establishing, the lateral wall that the tube shell is located prevents shaking the breach pastes with preventing shaking the strip mutually.

Through adopting above-mentioned technical scheme, the lateral wall that the tube shell is located and prevents shaking breach department pastes with the lateral wall of preventing shaking the strip to restrict the position of preventing shaking the strip, reduced the circumferential motion when needle shell and tube shell are connected.

Optionally, a closed groove is formed at one end of the tube shell, which is close to the needle shell, a closed tube and an elastic closed cap are arranged in the closed groove, the closed tube is communicated with the medical tube, one end, which is far away from the medical tube, of the closed tube is inserted into the elastic closed cap, and the outer wall of the elastic closed cap is attached to the inner wall of the tube shell, which is located in the closed groove, so that the closed groove is divided into two non-communicated areas.

By adopting the technical scheme, the needle core punctures the elastic sealing cap and finally penetrates out of the medical tube through the sealing tube; when the needle core is completely withdrawn from the tube shell, the punctured part of the elastic sealing cap is completely closed under the elastic action; the luer connector is inserted into the tube shell, the elastic sealing cap moves along the axial direction of the sealing groove, and at the moment, the sealing tube punctures the elastic sealing cap, so that blood in the medical tube enters an infusion apparatus or a hemostix connected with the luer connector.

Optionally, a spike part is arranged at one end of the sealing tube close to the elastic sealing cap.

By adopting the technical scheme, when the elastic sealing cap edge is in axial movement of the sealing groove, the spike part of the sealing pipe can puncture the elastic sealing cap rapidly.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. when in use, the medical staff inserts the needle core and the medical tube into the blood vessel of a patient, then pulls out the needle core from the medical tube, and separates the tube shell from the needle shell; at the moment, the resetting component resets the compressed deformation tube, the thrust force generated during resetting the deformation tube moves the base to the direction away from the tube shell, and finally the needle core is completely retracted into the tube shell; at this time, the clamping ring is also clamped in the clamping ring groove; at the moment, through the matching of the resetting component and the deformation tube, the arrangement of the clamping ring and the clamping ring groove enables the needle core to retract into the needle shell stably and automatically, so that cross infection caused by the exposed needle core is reduced;

2. the reset slide block moves towards the direction close to the tube shell, after the reset slide block is separated from the limit of the limit table, the reset slide block is pressed downwards, so that the reset slide block presses the reset block, the reset block can smoothly enter the needle shell, and finally, the needle core is brought back to the needle tube under the thrust of the deformation tube; the trigger condition that the deformation tube is reset can be achieved through the forward sliding and downward pressing actions, and the condition that the retention needle is scrapped due to the fact that the needle core is retracted after the retention needle is touched by mistake is reduced.

Drawings

FIG. 1 is a schematic view of the structure of an indwelling needle according to an embodiment of the present utility model.

FIG. 2 is a schematic cross-sectional view of an indwelling needle according to an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view showing the internal structure of the package according to the embodiment of the present utility model.

Fig. 4 is an enlarged schematic view of a in fig. 1.

Fig. 5 is a schematic cross-sectional view showing the internal structure of the needle housing in the embodiment of the present utility model.

Fig. 6 is an enlarged schematic view of B in fig. 5.

Fig. 7 is an enlarged schematic view of C in fig. 5.

Reference numerals illustrate: 1. a medical tube; 2. a needle core; 3. a tube shell; 31. anti-shake gap; 32. closing the groove; 33. a closed tube; 331. a spike; 34. an elastic airtight cap; 35. pipe holes; 36. rivet hollow tube; 4. a needle housing; 41. presetting a groove; 42. a clamping ring; 43. a reset hole; 431. a limiting table; 44. a buffer chute; 45. a sliding straight groove; 46. a relief notch; 47. an anti-shake bar; 48. a slip path; 5. a base; 51. a deformation tube; 52. a clamping ring groove; 53. an observation groove; 54. observing the plug; 6. a reset assembly; 61. resetting the connecting rod; 62. a reset block; 63. resetting the sliding block; 631. resetting the semi-ring; 632. resetting the plug block.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-7.

The embodiment of the utility model discloses an indwelling needle. Referring to fig. 1 and 2, the indwelling needle comprises a medical tube 1 and a needle core 2, a tube shell 3 is arranged on the medical tube 1, one end of the medical tube 1 is arranged in the tube shell 3, and the other end of the medical tube penetrates out of the tube shell 3; the needle core 2 is provided with a needle shell 4, one end of the needle core 2 is arranged in the needle shell 4, the other end of the needle core 2 penetrates out of the needle shell 4 and is inserted into the tube shell 3 and finally penetrates out of the medical tube 1, at the moment, the distance between the end part of the medical tube 1 far away from the tube shell 3 and the root part of the inclined surface of the needle core 2 is called as the Lai distance, the Lai distance is 0-1mm, and in the embodiment, the Lai distance is 0.4+/-0.3 mm; and the needle housing 4 is detachably connected with the tube housing 3.

When in use, the medical staff inserts the needle core 2 and the medical tube 1 together into the blood vessel of the patient, then pulls the needle core 2 out of the medical tube 1, and separates the tube shell 3 and the needle shell 4.

Referring to fig. 2 and 3, a tube hole 35 is formed in the tube housing 3 in a penetrating manner, the medical tube 1 extends out of one end of the tube hole 35, a rivet hollow tube 36 is inserted into one end of the medical tube 1 located in the tube housing 3, one end of the rivet hollow tube 36 is inserted into the medical tube 1 in an interference manner, and the tube diameter of the rivet hollow tube 36 is increased along a direction away from the medical tube 1.

The one end that the tube shell 3 is close to needle shell 4 has seted up closed groove 32, and closed groove 32 is linked together with tube hole 35, is provided with airtight pipe 33 and the airtight cap 34 of elasticity in the closed groove 32, and airtight pipe 33 inlays and establishes in closed groove 32, and communicates with rivet hollow tube 36, and airtight pipe 33 is close to the one end conflict of rivet hollow tube 36 on closed groove 32 inside wall, and airtight pipe 33 is close to the one end of the airtight cap 34 and is provided with spike portion 331.

The end of the sealing tube 33 far away from the rivet hollow tube 36 is inserted into the elastic sealing cap 34, the elastic sealing cap 34 is made of plastic, and the outer wall of the elastic sealing cap 34 is attached to the inner wall of the tube shell 3 located in the sealing groove 32 so as to separate the sealing groove 32 into two non-communicated areas. The needle core 2 punctures the elastic sealing cap 34 and finally passes out of the medical tube 1 through the sealing tube 33 and the rivet hollow tube 36.

When the needle core 2 is completely withdrawn from the tube shell 3, the punctured part of the elastic sealing cap 34 is completely closed under the elastic action; the luer connector is inserted into the tube shell 3, the elastic sealing cap 34 moves along the axial direction of the sealing groove 32, and at the moment, the spike 331 of the sealing tube 33 pierces the elastic sealing cap 34, so that blood in the medical tube 1 enters an infusion apparatus or a blood collector connected with the luer connector.

Referring to fig. 4, the end wall of the tube housing 3 near the needle housing 4 is provided with two anti-shake notches 31, in this embodiment, the two anti-shake notches 31 are symmetrically arranged along the axis of the tube housing 3; the needle housing 4 is provided with a plurality of anti-shake bars 47 near the end wall of the tube housing 3, and in this embodiment, the anti-shake bars 47 are provided with two, and two anti-shake bars 47 are inserted respectively in two anti-shake gaps 31, and at this time, the side wall of the tube housing 3 at the anti-shake gap 31 is attached to the side wall of the anti-shake bars 47, so as to limit the position of the anti-shake bars 47, reduce the circumferential rotation of the needle housing 4 and the tube housing 3 during assembly, and reduce the bending of the needle core 2 during the skin puncture of a patient.

Referring to fig. 5 and 6, a sliding channel 48 is formed in the needle housing 4, the sliding channel 48 is arranged along the axial direction of the needle housing 4, a base 5 is arranged in the sliding channel 48, one end of the base 5 close to the tube housing 3 is connected with the needle core 2, and the base 5 slides in the sliding channel 48 along the direction far away from the tube housing 3 so as to retract the extended needle core 2 into the needle housing 4.

Referring to fig. 5 and 6, an observation groove 53 is formed in one end of the base 5 far away from the needle core 2, an observation plug 54 is arranged in the observation groove 53, the observation plug 54 is made of a breathable material, when the observation plug 54 is inserted into the observation groove 53, an observation space is reserved between the end wall of the observation plug 54 and the bottom of the observation groove 53, and one end of the needle core 2 close to the observation plug 54 stretches into the reserved observation space; after the needle core 2 punctures the blood vessel of the patient, blood enters the reserved observation space through the needle core 2, and at the moment, the observation plug 54 discharges air in the reserved observation space, but can block the blood from flowing out, and medical staff can judge whether the indwelling needle punctures in place or not through whether blood exists in the reserved observation space.

Referring to fig. 5 and 6, a deformation tube 51 is sleeved on the base 5, in this embodiment, the deformation tube 51 is a spring, and the deformation tube 51 is located between the tail of the base 5 and the inner wall of the needle housing 4; when the deformation tube 51 is compressed, one end of the deformation tube 51 abuts against the inner wall of the needle housing 4, and the other end abuts against the protruding block at the tail end of the base 5, and the needle core 2 extends out of the needle housing 4.

The base 5 is provided with a reset component 6 for controlling the compressed deformation tube 51 to reset, the reset component 6 comprises a reset connecting rod 61, the side wall of the base 5 and one end of the reset connecting rod 61 are integrally formed, one end of the reset connecting rod 61 away from the base 5 is integrally formed with a reset block 62, the thickness of the reset block 62 is larger than that of the reset connecting rod 61, and a gap exists between the reset connecting rod 61 and the side wall of the base 5 for the reset connecting rod 61 to bend and deform.

Referring to fig. 5 and 6, the needle housing 4 is provided with a reset hole 43, the reset hole 43 communicates with the sliding channel 48, the reset block 62 is inserted into the reset hole 43 from the sliding channel 48, at this time, the needle core 2 extends out of the needle housing 4, and the deformation tube 51 is in a compressed state.

The inner wall of the needle shell 4 is provided with a buffer chute 44 and a sliding straight groove 45, the reset hole 43, the buffer chute 44 and the sliding straight groove 45 are communicated, and the buffer chute 44 and the sliding straight groove 45 are sequentially arranged, after the reset block 62 is separated from the reset hole 43, the elastic thrust of the deformation tube 51 enables the reset block 62 to slide along the buffer chute 44 and the sliding straight groove 45.

When the reset block 62 is positioned in the buffer chute 44, the reset connecting rod 61 is in a deformed state, the reset block 62 is abutted against the bottom of the buffer chute 44, and the sliding friction between the buffer chute 44 and the reset block 62 reduces the initial thrust of the deformed tube 51; when the reset block 62 is positioned in the sliding straight groove 45, the reset link 61 is in an original state, and a gap exists between the reset block 62 and the inner side wall of the sliding straight groove 45.

Referring to fig. 5 and 6, a limiting table 431 is arranged on the side wall of the needle shell 4 located in the reset hole 43, the limiting table 431 is integrally formed on the needle shell 4, the cross section of the limiting table 431 is in a right trapezoid shape, an acute angle of the limiting table 431 is close to the reset block 62, and two side walls at the acute angle of the limiting table 431 can be respectively attached to the side wall of the reset block 62 and the side wall of the reset connecting rod 61; under the condition that the compressed deformation tube 51 pushes the reset block 62, the sharp angle edge of the limiting table 431 increases the self-locking force of the reset block 62.

A reset slide block 63 is installed above the reset hole 43, a part of the reset slide block 63 is erected on the limiting table 431, and a reset insert block 632 is integrally formed on the bottom wall, which is not contacted with the limiting table 431, of the reset slide block 63, and the reset insert block 632 can be inserted into the reset hole 43 to press the reset block 62, so that the reset block 62 enters the sliding channel 48.

The side wall of the reset slide block 63 is connected with a reset semi-ring 631, the reset semi-ring 631 is in sliding clamping connection with the needle shell 4, one end of the needle shell 4, which is close to the reset semi-ring 631, is provided with a yielding gap 46, the yielding gap 46 is communicated with the reset hole 43, and the yielding gap 46 is used for deformation of the reset slide block 63. When the needle housing 4 is connected with the cartridge 3, the reset half ring 631 just abuts against the cartridge 3, and when the needle housing 4 is separated from the cartridge 3, the reset half ring 631 can move.

When the indwelling needle is in place, a medical staff moves a part of the needle shell 4 in a direction away from the tube shell 3, but at the moment, the shaking prevention strip 47 is not completely moved out of the shaking prevention notch 31, the reset slide block 63 moves in a direction close to the tube shell 3, after the reset slide block 63 is separated from the limit of the limit table 431, the reset slide block 63 is pressed downwards, the reset insert block 632 is inserted into the reset hole 43 to downwards press the reset block 62, the reset block 62 enters the sliding channel 48 from the reset hole 43, at the moment, the reset block 62 loses the limit of the side wall of the limit table 431, the deformation thrust of the deformation tube 51 promotes the reset block 62 to enter the buffer chute 44, the reset block 62 continuously rubs with the bottom of the buffer chute 44, after the reset block 62 enters the sliding straight groove 45 and loses the friction of the buffer chute 44, only the thrust of the deformation tube 51 continues to move, and finally the needle core 2 completely retracts into the sliding channel 48.

Referring to fig. 5 and 7, a preset groove 41 is formed at the bottom end of the needle housing 4, a clamping ring 42 is arranged in the preset groove 41 in a gap, a clamping ring groove 52 for inserting the clamping ring 42 is formed on the peripheral side wall of the tail end of the base 5, and one end of the base 5 close to the clamping ring 42 is conical.

When the base 5 moves towards the clamping ring 42, the conical end face of the base 5 is inserted into the clamping ring 42, at the moment, the clamping ring 42 is guided by the conical end face of the base 5, the center of the clamping ring 42 moves towards the axial direction of the needle shell 4, when the preset groove 41 on the base 5 moves to the lower side of the clamping ring 42, the clamping ring 42 descends again under the action of gravity, at the moment, the clamping ring 42 is attached to the bottom of the preset groove 41, the center of the clamping ring 42 is re-away from the axial line of the needle shell 4, and the side wall shell of the clamping ring 42 is attached to the inner side wall of the preset groove 41, so that the excessive rebound of the moving speed of the base 5 is avoided.

The implementation principle of the indwelling needle provided by the embodiment of the utility model is as follows: the needle shell 4 is arranged on the tube shell 3, and at the moment, the needle core 2 pierces the elastic sealing cap 34 and finally penetrates out of the medical tube 1 through the sealing tube 33 and the rivet hollow tube 36; at this time, the anti-shake bar 47 is inserted into the anti-shake gap 31, and the installation of the needle housing 4 and the cartridge 3 is completed;

when in use, medical staff inserts the medical tube 1 and the needle core 2 into a blood vessel of a patient at the same time, and after the medical tube 1 reaches the experience position of the medical staff, the needle core 2 is required to be withdrawn; at this time, the medical staff moves the needle shell 4 to a distance away from the tube shell 3, namely the needle core 2 does not move the medical tube 1 to a distance away from the needle shell 4, the tube shell 3 releases the limit of the reset semi-ring 631, the reset slide block 63 moves to a direction close to the tube shell 3, after the reset slide block 63 is separated from the limit of the limit table 431, the reset slide block 63 is pressed downwards, the reset insert block 632 is inserted into the reset hole 43 to press the reset block 62, the reset block 62 enters the sliding channel 48 from the reset hole 43, the reset block 62 loses the limit of the side wall of the limit table 431, the deformation thrust of the deformation tube 51 promotes the reset block 62 to enter the buffer chute 44, at this time, the reset block 62 continuously rubs with the bottom of the buffer chute 44, after the reset block 62 enters the sliding straight chute 45 and loses the friction of the buffer chute 44, the reset block 63 only continues to move by the thrust of the deformation tube 51, and finally the needle core 2 completely retracts into the sliding channel 48; at this time, the detent ring 42 is also locked in the detent ring groove 52.

The medical staff moves the needle shell 4 to the direction away from the tube shell 3 again, so that the needle shell 4 is taken down from the tube shell 3, at the moment, the part of the elastic sealing cap 34, which is punctured by the needle core 2, is closed, the luer connector is inserted into the sealing groove 32, the luer connector moves the elastic sealing cap 34 to the direction close to the medical tube 1, the spike 331 of the sealing tube 33 punctures the elastic sealing cap 34 again, and blood flows out through the sealing tube 33 and is communicated with the blood sampling needle holder or the intravenous infusion set through the luer connector.

Through the cooperation of reset subassembly 6 and deformation pipe 51, screens ring 42 and screens annular 52's setting, make the automatic retract that can stabilize of nook closing member 2 in the passageway 48 that slides, reduced the condition of exposing nook closing member 2 and caused cross infection and take place.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. The indwelling needle comprises a medical tube (1) and a needle core (2) penetrating into the medical tube (1), and is characterized in that: a tube shell (3) is arranged on the medical tube (1), a needle shell (4) is arranged on the needle core (2), and the needle shell (4) is detachably connected with the tube shell (3); the needle shell (4) is slidably provided with a base (5) connected with the needle core (2), the base (5) is sleeved with a deformation tube (51), the deformation tube (51) is positioned between the tail of the base (5) and the inner wall of the needle shell (4), and the base (5) is provided with a reset component (6) for controlling the compression reset of the deformation tube (51); the bottom of needle shell (4) is provided with predetermineeing groove (41), predetermineeing the inslot clearance and being provided with screens ring (42), set up on the periphery lateral wall of base (5) tail end and supply screens ring (42) to insert screens annular (52) of establishing.

2. The indwelling needle according to claim 1, wherein: the reset assembly (6) comprises a reset connecting rod (61), a reset block (62) and a reset slide block (63), wherein the reset connecting rod (61) is connected with the reset block (62), a reset hole (43) is formed in the outer wall of the needle shell (4), a buffer chute (44) and a sliding straight groove (45) are formed in the inner wall of the needle shell (4), and the reset hole (43), the buffer chute (44) and the sliding straight groove (45) are communicated and are sequentially arranged; the reset block (62) is inserted in the reset hole (43) and can slide along the buffer chute (44) and the sliding straight groove (45), and the reset slide block (63) is arranged above the reset hole (43) so as to press the reset block (62).

3. The indwelling needle according to claim 2, wherein: needle shell (4) are provided with spacing platform (431) on the lateral wall that is located reset hole (43), some of slider (63) that resets are set up on spacing platform (431), still be provided with on slider (63) that resets and reset insert piece (632), the lateral wall of slider (63) that resets is connected with reset semi-ring (631), reset semi-ring (631) slip cover is established on needle shell (4), the one end that needle shell (4) is close to reset semi-ring (631) is provided with the breach of stepping down (46), the breach of stepping down (46) communicate with reset hole (43), the breach of stepping down (46) supplies slider (63) deformation that resets to press reset piece (62).

4. The indwelling needle according to claim 3, wherein: the cross section of the limiting table (431) is right trapezoid, the acute angle side of the limiting table (431) is close to the reset block (62), and the acute angle of the limiting table (431) is matched with a groove at the joint of the reset block (62) and the reset connecting rod (61).

5. The indwelling needle according to claim 1, wherein: one end of the base (5) close to the clamping ring (42) is conical.

6. The indwelling needle according to claim 1, wherein: the utility model discloses a needle shell, including needle shell (4), shell (3), lateral wall, needle shell (4) are provided with a plurality of anti-shake strip (47) near one end of shell (3), shell (3) are close to the end wall of needle shell (4) direction and have been offered and have been prevented shaking breach (31) that strip (47) were inserted and establish, shell (3) are located the lateral wall of preventing shaking breach (31) and prevent shaking strip (47) and paste mutually.

7. The indwelling needle according to claim 6, wherein: the medical tube is characterized in that a closed groove (32) is formed in one end, close to the needle shell (4), of the tube shell (3), a closed tube (33) and an elastic closed cap (34) are arranged in the closed groove (32), the closed tube (33) is communicated with the medical tube (1), one end, far away from the medical tube (1), of the closed tube (33) is inserted into the elastic closed cap (34), and the outer wall of the elastic closed cap (34) is adhered to the inner wall, located in the closed groove (32), of the tube shell (3) so as to separate the closed groove (32) into two non-communicated areas.

8. The indwelling needle according to claim 7, wherein: the sealing tube (33) is provided with a spike (331) near one end of the elastic sealing cap (34).