CN210903261U

CN210903261U - Double-cannula medical safety puncture needle with locking function

Info

Publication number: CN210903261U
Application number: CN201921137847.9U
Authority: CN
Inventors: 沈敏峰; 沈天阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-07-03
Anticipated expiration: 2029-07-18

Abstract

The utility model provides a double cannula medical safety pjncture needle is locked in area, including the locking subassembly, the locking subassembly includes the connecting block, insurance piece and elasticity crochet hook, in connecting block and insurance piece located the casing in proper order, the connecting block front end is connected with interior needle, the connecting block rear end is equipped with the first spring that is used for driving interior needle and stretches out outer needle front end, elasticity crochet hook one end is connected with the connecting block, the elasticity crochet hook other end extends to insurance piece direction, be equipped with on the insurance piece with elasticity crochet hook complex locking groove, insurance piece front side be equipped with the first spigot surface of elasticity crochet hook complex, insurance piece rear side is equipped with the second spigot surface with elasticity crochet hook direction locking inslot, be equipped with on the insurance piece and drive the drive assembly that the locking groove is close to or keeps away from elasticity croc. The utility model provides a pair of medical safe pjncture needle of double cannula is locked in area adopts elasticity crochet hook and safe piece to mutually support, and when the stomach wall was penetrated to the outer needle, the outer needle outside and locking were popped out to the inner needle, avoided causing the damage to the tissue or the organ in the abdominal cavity.

Description

Double-cannula medical safety puncture needle with locking function

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a medical safety puncture needle with a locking double-sleeve.

Background

Surgical instruments have been used for hundreds of years, and doctors in surgery use different surgical instruments to complete the operations of tissue grasping, shearing, separating, blood coagulation, suture closing and the like, and the surgical instruments have matured after hundreds of years of development. Endoscopic surgery has been clinically developed for over 30 years and is progressing rapidly. Briefly, endoscopic surgery, i.e., a surgeon, uses a lengthened endoscopic hand-held instrument to enter a patient's body through a natural orifice or a puncture channel formed therein, thereby completing operations such as tissue grasping, cutting, separating, blood coagulation, suture closure, etc.

The most common instruments used in performing laparoscopic surgery are pneumoperitoneum needles, drainage needles and infusion double trocars. The traditional puncture needle comprises an outer needle and an inner needle, wherein the inner needle can move in the outer needle; when the puncture needle is used, one hand of a doctor holds the puncture needle, the other hand of the doctor determines the position of the abdomen of a patient, the doctor acts the puncture needle on the abdomen of the patient after the position is determined, at the moment, the inner needle head of the puncture needle is firstly contacted with the skin of the patient, and the inner needle head is blunt and cannot puncture the skin of the patient to enter the abdominal cavity of the patient after contacting the skin of the patient; the physician continues to apply downward force to the patient's abdominal cavity and the patient's skin exerts an upward force on the inner needle, causing it to retract into the outer needle. When the inner needle tip is fully retracted into the outer needle, the outer needle tip contacts and pierces the patient's skin and enters the patient's abdominal cavity.

The pneumoperitoneum needle penetrates through all tissues of the abdominal wall, and the penetrated tissues comprise skin, subcutaneous tissues, subcutaneous fat layers, subcutaneous muscle layers and peritoneum. Wherein, the peritoneum is particularly compact, the toughness is stronger, and the puncture needle has extremely strong breakthrough feeling due to the sudden drop of resistance when penetrating the peritoneum; when the existing puncture needle penetrates through the abdominal wall, the safety self-locking cannot be realized, and the tissue or the viscera in the abdominal cavity are easily damaged to cause accidents. The clinical urgent need is a puncture needle, which can self-lock the puncture tip when penetrating the abdominal wall, and avoid the damage to the tissues or organs in the abdominal cavity.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects in the prior art, the utility model provides a medical safety puncture needle with a locking double-sleeve.

The utility model provides a technical scheme that its technical problem will adopt is: a double-cannula medical safety puncture needle with locking function comprises a shell, an inner needle and an outer needle, wherein the front end of the outer needle is provided with a puncture tip, the rear end of the outer needle is communicated with the shell, the outer needle is sleeved outside the inner needle, the inner needle is in sliding connection with the outer needle, the front end of the inner needle is provided with a protection part, the side wall of the inner needle, which is close to the protection part, is provided with an injection hole, the double-cannula medical safety puncture needle further comprises a locking assembly, the locking assembly comprises a connecting block, a safety block and an elastic crochet needle, the connecting block and the safety block are sequentially arranged in the shell from front to back, the front end of the connecting block is connected with the inner needle, the rear end of the connecting block is provided with a first spring for driving the inner needle to extend out of the front end of the outer needle, one end of the elastic crochet needle is connected with the connecting block, the other end of the elastic croc, the safety block front side be equipped with the first spigot surface of elasticity crochet hook complex, the safety block rear side be equipped with the direction of elasticity crochet hook the second spigot surface of locking inslot, be equipped with the drive on the safety block the locking groove is close to or keeps away from the drive assembly of elasticity crochet hook removal orbit.

The outer needle is used for contacting the skin of a patient and puncturing the skin of the patient under the action of the puncturing tip, the inner needle is provided with a protection part for preventing accidents caused by the damage of tissues or organs in the abdominal cavity, the protection part can be in a blunt head shape such as a spherical shape and an arc shape, and the inner needle is provided with an injection hole for injecting or extracting gas or liquid in the human body; the inner needle is connected with the connecting block, the position of the inner needle is unchanged when the position of the connecting block is fixed, and the first spring automatically pops out of the outer needle when the front end of the inner needle loses resistance by pushing the connecting block; the elastic crochet hook moves back and forth in the shell along the axial direction when the inner needle extends out and retracts into the outer needle; drive assembly is used for arousing the safety block, move the safety block to in the elasticity crochet hook removes the orbit, medical staff is when carrying out the puncture action, interior needle is pressed in the indentation outer needle, the connecting block drives elasticity crochet hook and is close to the safety block under the drive of interior needle, elasticity crochet hook slides to safety block rear side along first spigot surface, outer needle is in accomplishing the puncture back, interior needle front end loses the resistance, move down to the outer needle outside at first spring propelling movement, it removes to drive elasticity crochet hook when the connecting block removes, elasticity crochet hook slides along the second spigot surface, finally slide into the locking inslot, the locking of interior needle is in the outer needle outside, prevent that outer needle from causing the injury of organizing or the internal organs in the abdominal cavity.

Further, in order to make the safety block reciprocate in the casing, drive assembly includes button and cylindricality slide bar, the slide bar is located the safety block lower extreme, be equipped with on the inboard diapire of casing with slide bar complex spout, the button passes the casing upper end with safety block fixed connection, the cover is equipped with the drive on the button the safety block is kept away from the second spring of spout. The medical staff presses the button to move the safety block to the moving track of the elastic crochet hook, when the outer needle pierces the abdominal wall, the inner needle automatically pops out of the outer needle and automatically locks the position; after the medical staff loosens the button, the safety block resets under the action of the second spring and is far away from the movement track of the elastic crochet hook, after the safety block resets, the elastic crochet hook is separated from the locking groove, and the inner needle can slide back and forth in the outer needle.

Further, in order to enable the safety block to move up and down in the shell, the driving assembly comprises a guide rod and a screw rod, the guide rod penetrates through the safety block along the vertical direction to be connected with the shell in a rotating mode, the guide rod is connected with the safety block in a sliding mode, the screw rod is parallel to the axis of the guide rod, the screw rod is connected with the safety block in a threaded mode, the lower end of the screw rod is connected with the shell in a rotating mode, a torsion spring is sleeved on the upper side of the screw rod, the inner end of the torsion spring is fixedly connected with the screw rod, and the outer end of. The safety block is moved to the moving track of the elastic crochet hook by rotating the screw rod, and when the outer needle pierces the abdominal wall, the inner needle automatically pops out of the outer needle and automatically locks the position; after the medical staff loosens the screw rod, the safety block resets under the action of the torsion spring, the elastic crochet hook is separated from the locking groove, and the inner needle can slide back and forth in the outer needle.

Further, in order when outer needle pierces the stomach wall, the outer needle outside is popped out to interior needle automatic springing to automatic locking position, locking groove sets up in the safety block bottom, locking groove import is located on the safety block lateral wall, the locking inslot is equipped with and is used for preventing the spacing portion of elasticity crochet hook roll-off.

Further, the bottom of the connecting block is provided with a V-shaped avoiding groove matched with the elastic crochet hook. Elastic deformation can take place for the elasticity crochet hook when sliding along first spigot surface and second spigot surface, and in order to guarantee that the elasticity crochet hook removes smoothly, the connecting block bottom sets up the V-arrangement and dodges the groove.

The utility model has the advantages that: the utility model provides a pair of medical safe pjncture needle of double cannula is locked in area adopts elasticity crochet hook and safe piece to mutually support, and when the stomach wall was penetrated to the outer needle, the outer needle outside and locking were popped out to the inner needle, avoided causing the damage to the tissue or the organ in the abdominal cavity.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is an enlarged schematic view of A of FIG. 1;

fig. 3 is a schematic cross-sectional view of the initial state of the present invention;

fig. 4 is a schematic cross-sectional view of the locked state of the present invention;

FIG. 5 is a schematic structural view of a preferred embodiment of the drive assembly of the present invention;

FIG. 6 is a schematic structural view of a preferred embodiment of the drive assembly of the present invention;

FIG. 7 is a schematic structural diagram of a second preferred embodiment of the present invention.

In the figure: 1. the needle comprises a shell, 2, an inner needle, 3, an outer needle, 4, an injection hole, 5, a connecting block, 6, a safety block, 6-1, a first guide surface, 6-2, a second guide surface, 7, an elastic crochet hook, 8, a first spring, 9, a locking groove, 9-1, a limiting part, 10, a button, 11, a sliding rod, 12, a sliding groove, 13, a second spring, 14, a V-shaped avoiding groove, 15, a supporting rod, 16, a guide rod, 17, a screw rod, 18, a torsional spring, 19 and a knob.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

The first embodiment is as follows:

as shown in fig. 1-6, the utility model discloses a medical safe pjncture needle of double cannula is locked in area, including casing 1, interior needle 2 and outer needle 3, outer needle 3 front end is equipped with the puncture pointed end, outer needle 3 rear end with casing 1 intercommunication, outer needle 3 cover is located the interior needle 2 outside, interior needle 2 with outer needle 3 sliding connection, interior needle 2 front end is equipped with the protection portion, interior needle 2 has seted up two injection holes 4 on being close to the lateral wall of protection portion.

The needle locking device is characterized by further comprising a locking assembly, the locking assembly comprises a connecting block 5, a safety block 6 and an elastic crochet hook 7, the connecting block 5 and the safety block 6 are sequentially arranged in the shell 1 from front to back, the front end of the connecting block 5 is connected with the inner needle 2, the rear end of the connecting block 5 is provided with a first spring 8 for driving the inner needle 2 to stretch out of the front end of the outer needle 3, the connecting block 5 is provided with a supporting rod 15 matched with the first spring 8 to prevent the first spring 8 from bending deformation, one end of the elastic crochet hook 7 is connected with the connecting block 5, the other end of the elastic crochet hook 7 extends towards the safety block 6, the safety block 6 is provided with a locking groove 9 matched with the elastic crochet hook 7, the front side of the safety block 6 is provided with a first guide surface 6-1 matched with the elastic crochet hook 7, the rear side of the safety block 6 is provided with a second guide surface 6-2 for guiding the elastic crochet hook 7 into the second guide, and a driving component for driving the locking groove 9 to be close to or far away from the moving track of the elastic crochet hook 7 is arranged on the safety block 6.

Drive assembly includes button 10 and cylindricality slide bar 11, slide bar 11 is located 6 lower extremes of safety block, slide bar 11 forms with safety block 6 integrated into one piece, be equipped with on the 1 inboard diapire of casing with slide bar 11 complex spout 12, button 10 passes 1 upper end of casing with 6 threaded connection of safety block, the cover is equipped with the drive on the button 10 safety block 6 is kept away from the second spring 13 of spout 12.

Locking groove 9 is seted up in the 6 bottoms of safety block, locking groove 9 import is located on the 6 lateral walls of safety block, locking inslot is equipped with and is used for preventing the spacing portion 9-1 of elasticity crochet hook 7 roll-off, the cross-section that locks the 9 horizontal direction is L shape. The bottom of the connecting block 5 is provided with a V-shaped avoiding groove 14 matched with the elastic crochet hook 7.

The working process is as follows:

the medical staff presses the button 10 to lower the position of the safety block 6, the position of the button 10 is kept unchanged, then the medical staff performs a puncture action, the inner needle 2 is pressed to retract into the outer needle 3, the connecting block 5 drives the elastic crochet hook 7 to be close to the safety block 6 under the driving of the inner needle 2, the elastic crochet hook 7 slides to the rear side of the safety block 6 along the first guide surface 6-1, the front end of the inner needle 2 loses resistance after the outer needle 3 completes the puncture, the elastic crochet hook 7 is pushed by the first spring 8 to move downwards to the outer side of the outer needle 3, the elastic crochet hook 7 is driven to move when the connecting block 5 moves, the elastic crochet hook 7 slides along the second guide surface 6-2 and slides into the locking groove 9, the elastic crochet hook 7 falls into the limiting part 9-1 of the locking groove 9, the position of the elastic crochet hook 7 is locked, the inner needle 2 is locked at the outer side of the outer needle 3, and the abdominal tissues;

after the medical staff loosens the button 10, the safety block 6 is reset under the action of the second spring 13, the elastic crochet hook 7 is separated from the limit part 9-1 of the locking groove 9, and the inner needle 2 can slide back and forth in the outer needle 3.

Example two:

as shown in fig. 7, the difference between the first embodiment and the second embodiment is that the driving assembly includes a guide rod 16 and a screw rod 17, the guide rod 16 passes through the safety block 6 and the housing 1 in the vertical direction, the guide rod 16 is connected with the safety block 6 in a rotating manner, the screw rod 17 is parallel to the axis of the guide rod 16, a knob 19 is arranged at the upper end of the screw rod 17, the screw rod 17 is connected with the safety block 6 in a threaded manner, the lower end of the screw rod 17 is connected with the housing 1 in a rotating manner, a torsion spring 18 is sleeved on the upper side of the screw rod 17, the inner end of the torsion spring 18 is connected with the screw rod 17 in a welding manner, and the outer end of the.

The working process is as follows:

the medical staff twists the knob 19 to lower the position of the safety block 6, the position of the knob 19 is kept unchanged, then the medical staff performs a puncture action, the inner needle 2 is pressed to retract into the outer needle 3, the connecting block 5 drives the elastic crochet hook 7 to be close to the safety block 6 under the driving of the inner needle 2, the elastic crochet hook 7 slides to the rear side of the safety block 6 along the first guide surface 6-1, the front end of the inner needle 2 loses resistance after the outer needle 3 completes the puncture, the elastic crochet hook 7 is pushed by the first spring 8 to move downwards to the outer side of the outer needle 3, the elastic crochet hook 7 is driven to move when the connecting block 5 moves, the elastic crochet hook 7 slides along the second guide surface 6-2 and slides into the locking groove 9, the elastic crochet hook 7 falls into the limiting part 9-1 of the locking groove 9, the position of the elastic crochet hook 7 is locked, the inner needle 2 is locked at the outer side of the outer needle 3, and the abdominal tissues;

the medical staff loosens the knob 19, the screw 17 is reset under the action of the torsion spring 18, thereby the safety block 6 is reset, the elastic crochet hook 7 is separated from the locking groove 9, and the inner needle 2 can slide back and forth in the outer needle 3.

Directions and references (e.g., up, down, left, right, etc.) in the present disclosure may be used solely to aid in the description of the features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a two medical safe pjncture needles of sleeve pipe of area locking, includes casing (1), interior needle (2) and outer needle (3), outer needle (3) front end is equipped with the puncture pointed end, outer needle (3) rear end with casing (1) intercommunication, outer needle (3) cover is located interior needle (2) outside, interior needle (2) with outer needle (3) sliding connection, interior needle (2) front end is equipped with the protection portion, be equipped with injection hole (4) on the lateral wall that interior needle (2) are close to the protection portion, its characterized in that: still include the locking subassembly, the locking subassembly includes connecting block (5), safety block (6) and elasticity crochet hook (7), locating in proper order backward in the past in connecting block (5) and safety block (6) in casing (1), connecting block (5) front end with interior needle (2) are connected, connecting block (5) rear end is equipped with and is used for the drive interior needle (2) stretch out first spring (8) of outer needle (3) front end, elasticity crochet hook (7) one end with connecting block (5) are connected, elasticity crochet hook (7) other end to safety block (6) direction extends, be equipped with on safety block (6) with elasticity crochet hook (7) complex locking groove (9), safety block (6) front side is equipped with and first spigot surface (6-1) of elasticity crochet hook (7) complex, safety block (6) rear side is equipped with elasticity crochet hook (7) direction second spigot surface (9) interior locking groove (6) are led (6-2), be equipped with the drive assembly that drives locking groove (9) are close to or keep away from elasticity crochet hook (7) moving trajectory on insurance block (6).

2. The medical safety puncture needle with locking double sleeves as claimed in claim 1, wherein: drive assembly includes button (10) and cylindricality slide bar (11), slide bar (11) are located insurance block (6) lower extreme, be equipped with on casing (1) inboard diapire with slide bar (11) complex spout (12), button (10) are passed casing (1) upper end with insurance block (6) fixed connection, the cover is equipped with the drive on button (10) insurance block (6) are kept away from second spring (13) of spout (12).

3. The medical safety puncture needle with locking double sleeves as claimed in claim 1, wherein: drive assembly includes guide arm (16) and screw rod (17), guide arm (16) are passed along vertical direction safety block (6) with casing (1) is rotated and is connected, guide arm (16) with safety block (6) sliding connection, screw rod (17) with guide arm (16) axis is parallel, screw rod (17) with safety block (6) threaded connection, screw rod (17) lower extreme with casing (1) is rotated and is connected, the side cover is equipped with torsional spring (18) on screw rod (17), torsional spring (18) inner with screw rod (17) fixed connection, torsional spring (18) outer end with casing (1) fixed connection.

4. A locking double cannula medical safety needle as claimed in claim 2 or 3, wherein: locking groove (9) are seted up in safety block (6) bottom, locking groove (9) import is located on safety block (6) lateral wall, be equipped with in locking groove (9) and be used for preventing spacing portion (9-1) of elasticity crochet hook (7) roll-off.

5. The medical safety puncture needle with locking double sleeves as claimed in claim 4, wherein: the bottom of the connecting block (5) is provided with a V-shaped avoiding groove (14) matched with the elastic crochet hook (7).